A fluid delivery pump or a mechanical pressurizing the fluid, mainly used to transport water, oil, pulp, alkali, emulsions, suspoemulsions, a mixture of gas and liquid metal and the like, the mining, chemical and metallurgical industries common Conveying equipment, the following small series for you to organize 19 kinds of pumps (gear pump, centrifugal pump, screw pump, reciprocating pump, piston pump, hydraulic piston pump, mud pump , pneumatic diaphragm pump, axial flow pump, self-priming pump, Dynamic working principle and characteristics of vortex pump, water ring vacuum pump, Roots vacuum pump, rotary vane vacuum pump, gas booster pump, gas-liquid booster pump, steam jet pump, etc., in order to select and use the pump There is some help in the aspect.
1, gear pump
Working principle: the teeth of the two gears of the gear pump are separated from each other to form a low pressure, the liquid is sucked in, and sent to the other side along the wall of the casing. The other two gears are closed to each other to form a high pressure to discharge the liquid.
Advantages: simple and compact structure, small size, light weight, good processability, low price, strong self-suction, insensitive to oil pollution, large speed range, impact resistance load, convenient maintenance and reliable operation.
Disadvantages: radial force imbalance, large flow artery, high noise, low efficiency, poor interchangeability of parts, difficult to repair after wear, can not be used for variable pump.
2, centrifugal pump
Working principle: When the centrifugal pump is working, the liquid fills the pump casing, the impeller rotates at high speed, the liquid generates high speed under the action of centrifugal force, and the high-speed liquid passes through the gradually enlarged pump casing passage.
The dynamic head is converted into a static head.
Performance characteristics:
Energy efficient: The pump has an efficient hydraulic line and high efficiency.
Convenient installation and maintenance: vertical pipeline structure, the inlet and outlet of the pump can be installed in any position and any direction of the pipeline like a valve, and the installation and maintenance are extremely convenient.
Smooth operation, safe and reliable: the motor shaft and the pump shaft are coaxial and directly connected, with high concentricity, stable operation, safe and reliable.
Stainless steel bushing: The sealing position of the shaft is relatively easy to be rusted. Once the direct-coupled pump shaft is rusted, it is easy to cause mechanical seal failure. Inlay with stainless steel bushings to avoid rust, improve shaft life and reduce operating and maintenance costs.
Bearing: The lower shaft end bearing of the motor equipped with the pump adopts closed bearing. When it is used normally, the maintenance of the motor bearing is avoided.
Machine seal: The mechanical seal base is generally made of rubber bellows structure. The seal on the shaft of the traditional mechanical seal is changed from the line seal of the O-ring to the two-face seal of the rubber part, which improves the sealing effect in the clear water medium.
3, multi-stage centrifugal pump
Working principle: Compared with single-stage pump, the multi-stage centrifugal pump has the difference that the multi-stage pump has more than two impellers, which can absorb water and pressure water in multiple stages in stages, thereby lifting the water to a high position. The lift can increase or decrease the number of stages of the pump impeller as needed.
The multi-stage centrifugal pump has two types: vertical and horizontal. The pump shaft of the multi-stage centrifugal pump is equipped with two impellers in series, which can achieve a higher lift than a single-stage centrifugal pump.
Performance characteristics: Multi-stage pumps are mainly used for mine drainage, urban and factory water supply. Compared with reciprocating pumps such as piston pumps and diaphragm pumps, a large flow rate can also be pumped. The multi-stage centrifugal pump has high efficiency and can meet the needs of high lift and high flow conditions, and has been widely used in petrochemical, chemical, electric power, construction, fire protection and other industries.
Due to its particularity, multistage centrifugal pumps have different and higher technical requirements in terms of design, use and maintenance than single-stage centrifugal pumps.
4, screw pump
Working principle: The twin-screw pump is very similar to the gear pump. One screw rotates to drive the other screw. The liquid is intercepted in the meshing chamber, propelled along the rod axis, and then squeezed toward the center to discharge.
Advantages of the screw pump:
Wide pressure and flow range. The pressure is about 3.4-340 kgf/cm2, and the flow rate can reach 100cm3/min;
Type and viscosity of the liquid transporting a wide range, can be used for dressing plant delivery collector, flocculants and the like;
Because the inertial force of the rotating parts in the pump is low, a very high speed can be used;
Good inhalation performance and self-priming ability;
The flow rate is uniform and continuous, the vibration is small, and the noise is low;
Less sensitive to incoming gases and dirt than other rotary pumps;
The structure is solid and easy to install and maintain.
Disadvantages of the screw pump: The processing and assembly requirements of the screw are high; the performance of the pump is sensitive to the viscosity change of the liquid.
5, reciprocating pump
Working principle: When the reciprocating pump works, the piston moves to the right, the pressure in the chamber decreases, the upper valve is pressed down, the lower valve is lifted up, the liquid is sucked in; the piston is moved to the left, the pressure in the chamber is increased, and the upper valve is lifted up, and the lower valve is pressed. The liquid is discharged.
Advantages of the reciprocating pump:
High discharge pressure can be obtained, and the flow rate is independent of pressure, the suction performance is good, and the efficiency is high, wherein the steam reciprocating pump can reach 80%~95%;
In principle, any medium can be transported, almost independent of the physical or chemical properties of the medium;
The performance of the pump does not vary with changes in pressure and viscosity of the delivery medium.
Disadvantages of reciprocating pumps: The flow rate is not very stable. The same flow rate is larger than the centrifugal pump; the mechanism is complicated; the amount of funds is large; it is not easy to repair.
6, double action reciprocating pump
Working principle: When the double-action reciprocating pump works, the piston moves to the right, the bottom left absorbs the liquid, and the upper right drains. The piston is moved to the left, the bottom right is aspirated, and the upper left is drained. The piston reciprocates once, and it has two suctions and discharges, and the flow rate is more uniform.
7, piston pump
Working principle: The piston pump is also called electric reciprocating pump. It is divided into single cylinder and multi cylinder from the structure. When the piston pump is working, the internal volume of the cylinder is repeatedly changed by the reciprocating action of the piston in the cylinder to suck and discharge the fluid.
Performance characteristics of the piston pump:
The piston pump is suitable for high pressure and small flow, especially when the flow rate is less than 100m3/h, and the discharge pressure is greater than 9.8 MPa, which shows its high efficiency and good running performance.
Suction performance, to a variety of pumping liquid media of different viscosity, may be used in oil field, coal seam water, grease, oil. Corrosive liquids can be transported if the flow-through components are stainless steel. In addition, depending on the material of the structure, high-temperature tar, slime, high-concentration mortar, high-viscosity liquid, etc. can also be transported.
Piston pumps are widely used in the petrochemical industry, machinery manufacturing industry, papermaking, food processing, and pharmaceutical production.
8, hydraulic piston pump
Working principle: hydraulic piston pump or solid pump, hydraulic hydraulic cylinder drives hydraulic cylinder, hydraulic cylinder pushes the conveying cylinder, and the material in the conveying cylinder is output to the pipeline.
Generally divided into single plunger and double plunger, the basic principle of the plunger pump is very simple. This pump uses the momentum of a relatively large moving water body to pump a relatively small volume of water to a high point.
Hydraulic piston pumps are widely used in sewage treatment, solid waste treatment, mining metallurgy, dredging, dredging, petrochemical, power plants, cement industry and other fields.
9, mud pump
Working principle: The commonly used mud pump is piston type or plunger type. The crankshaft of the pump is driven by the power machine. The crankshaft drives the piston or plunger to reciprocate in the pump cylinder through the crosshead. Under the alternating action of the suction and discharge valves, the purpose of pumping and circulating the flushing liquid is achieved.
Mud pump refers to the machine that transports mud or water and other flushing fluid into the borehole during drilling, and is an important part of drilling equipment.
In the commonly used positive circulation drilling, the surface flushing medium—clear water, mud or polymer flushing liquid is directly sent to the bottom end of the drill bit through a high-pressure hose, faucet and drill rod center hole under a certain pressure to achieve cooling. The drill bit removes and transports the cutting debris to the surface.
10, pneumatic diaphragm pump
Working principle: When the pneumatic diaphragm pump is working, in order to make the living column not directly contact with the corrosive liquid, the cylinder cavity and the liquid material are separated by a diaphragm, which is also the principle of the reciprocating pump. Pneumatic diaphragm pump has four of material: plastic, aluminum alloy, cast iron, stainless steel.
Performance characteristics of pneumatic diaphragm pump
Compressed air is used as a power source for a variety of corrosive liquids. Different materials can be used according to different liquid media to meet the needs of different users.
The pump will not overheat: the compressed air is used as the power, and it is a process of expansion and heat absorption when exhausting. The temperature of the pneumatic pump is reduced when working, and no harmful gas is discharged.
No sparks are generated: the pneumatic diaphragm pump does not use electricity for power, and prevents static sparks after grounding.
It can pass through the liquid containing particles: because it is volumetric and the inlet is a ball valve, it is not easy to be blocked.
The shearing force on the material is extremely low: how to suck in when working, so the agitation of the material is minimal, suitable for the transport of unstable materials.
The flow rate is adjustable and a throttle valve can be added to the material outlet to regulate the flow.
Has the function of self-priming.
It can run empty without danger.
Can work diving.
The fluids that can be transported are extremely wide, from low viscosity to high viscosity, and viscous from corrosive.
No complicated control system, no cables, fuses, etc.
Small size, light weight and easy to move.
No lubrication is required, so maintenance is easy and there is no pollution to the working environment due to dripping.
The pump is always efficient and does not degrade due to wear.
100% energy utilization, when the outlet is closed, the pump automatically stops, the equipment moves, wears, overloads, heats up
No dynamic seals, easy maintenance and avoid leakage. There is no dead point when working.
11, axial flow pipe pump
Working principle: The impeller of the axial flow pump is designed to be axial flow, and the rotation speed is very high. If the motor power, the impeller diameter and the pipe diameter are large enough, the flow rate can be large.
Performance characteristics of axial flow pump:
The pipeline pump has compact structure, integrated pump and small volume, and its vertical structure has small installation area, stable operation and no adjustment for installation.
The pump inlet and outlet are designed to have the same flange and are located in the same center. They can be directly installed on the pipeline like a valve, and the center is low, which is convenient for pipeline layout and easy to install.
The pump is coaxial with the motor and has a short axial dimension, which makes the pump run more smoothly and with low noise.
The traditional shaft sealing method is eliminated, and the leakage of the conveying medium is avoided, so that it has a remarkable characteristic of no leakage at all.
12, self-priming pump
Working principle: Before the pump starts, fill the pump casing with water (or water in the pump casing). After the start, the impeller rotates at a high speed to make the water in the impeller channel flow toward the volute. At this time, the inlet forms a vacuum, so that the inlet water stops the door, and the air in the suction pipe enters the pump and reaches the outer edge through the impeller channel.
Self-priming pump performance characteristics:
The self-priming pump is a self-priming centrifugal pump, which has the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long service life and strong self-priming capability.
The pipeline does not need to be installed with a bottom valve. It is only necessary to ensure that the pump body has a quantitative liquid before the work. Different materials can be self-priming pumps of different materials.
13, vortex pump
Working principle: the liquid in the groove of the vane of the vortex pump is centrifugally forced to the flow channel for one pressurization; the liquid in the flow channel is decomposed by the liquid in the trough to form a low pressure, enter the groove again, and pressurize again; The groove has a vortex motion of a groove, so that a higher pressure head is obtained.
Advantages of the vortex pump:
W type single-stage direct-connect vortex pump is used for sucking clean water or liquid with physical and chemical properties similar to water. The liquid temperature is not more than 60 °C, which is often used for boiler feed water, in shipbuilding, textile, chemical, metallurgy, Machinery manufacturing, aquaculture, fixed fire control, heat exchanger groups, agricultural remote sprinklers, etc. have a wide range of applications.
The small size and light weight of the vortex pump have great advantages in marine installations. Self-priming with self-priming or with simple means.
It has a steep drop characteristic curve and is therefore insensitive to pressure fluctuations in the system. Some vortex pumps allow for vapor-liquid mixing. This is of great significance for the pumping of volatile liquids containing gases and high temperature liquids with high vaporization pressures.
The vortex pump has a simple structure, and the casting and processing processes are easy to implement. Some vortex pump parts can also use non-metallic materials such as plastic and nylon molded impellers.
Disadvantages of the vortex pump:
The efficiency is low, up to 55%, and most vortex pumps are 20-40% efficient, thus hindering their development toward high power.
The cavitation performance of the vortex pump is poor.
Vortex pumps cannot be used to pump more viscous media. As the viscosity of the liquid increases, the lift and efficiency of the pump drop sharply, and the viscosity of the medium is limited to 114 centistokes.
The stricter radial clearance and axial clearance between the vortex pump impeller and the pump body imposes certain difficulties on the machining and assembly process.
The pumped media is limited to pure liquids. When the liquid contains solid particles, the axial and radial gaps increase due to wear, which degrades the performance of the pump or causes the vortex pump to fail.
14, water ring vacuum pump
Working principle: The impeller of the water ring vacuum pump blade is eccentrically mounted in a cylindrical pump casing. Inject a certain amount of water into the pump. When the impeller rotates, the water is pumped to the pump casing to form a water ring, and the inner surface of the ring is tangent to the impeller hub. Since the pump casing is not concentric with the impeller, the intake space 4 between the right half hub and the water ring is gradually enlarged, thereby forming a vacuum, and the gas enters the intake space of the pump through the intake pipe. The gas then enters the left half, and as the volume between the hub rings is gradually compressed, the pressure is increased, so that the gas is discharged to the outside of the pump through the exhaust space and the exhaust pipe.
Advantages of the water ring vacuum pump:
The structure is simple, the manufacturing precision is not high, and the processing is easy.
The structure is compact, the number of revolutions of the pump is high, and it can generally be directly connected with the motor without the need for a speed reducer. Therefore, with a small structural size, a large displacement can be obtained, and the footprint is small.
The compressed gas is substantially isothermal, i.e., the temperature of the compressed gas process changes little.
Since there is no metal friction surface in the pump chamber, there is no need to lubricate the pump and the wear is small. The seal between the rotating member and the fixing member can be directly completed by a water seal.
Uniform suction, stable and reliable operation, easy operation and convenient maintenance.
Disadvantages of water ring vacuum pumps:
The efficiency is low, generally around 30%, preferably up to 50%.
The degree of vacuum is low, not only because of structural limitations, but more importantly by the vapor pressure of the working fluid. With water as the working fluid, the ultimate pressure can only reach 2000~4000Pa. Use oil as working fluid, up to 130Pa.
In short, since the gas compression in the water ring pump is isothermal, it is possible to remove flammable and explosive gases. Since there is no exhaust valve and friction surface, it is possible to remove dusty gas, condensable gas and gas-water mixture. With these outstanding features, despite its inefficiency, it is still widely used.
15, Roots vacuum pump
How it works: The Roots pump works like a Roots blower. Due to the continuous rotation of the rotor, the pumped gas is sucked from the intake port into the space v0 between the rotor and the pump casing, and then discharged through the exhaust port. Since the v0 space is fully closed after inhalation, the gas is not compressed and expanded in the pump chamber. However, when the top of the rotor turns over the edge of the exhaust port and the v0 space communicates with the exhaust side, since the gas pressure on the exhaust side is high, a part of the gas is returned to the space v0, so that the gas pressure suddenly increases. When the rotor continues to rotate, the gas exits the pump.
Large pumping speed over a wide range of pressures;
Start fast and work immediately;
Insensitive to dust and water vapor contained in the pumped gas;
The rotor does not have to be lubricated and there is no oil in the pump chamber;
The vibration is small, the rotor dynamic balance condition is good, and there is no exhaust valve;
Low driving power and low mechanical friction loss;
Compact structure and small footprint;
Low operating and maintenance costs.
Therefore, Roots pumps are widely used in the metallurgical, petrochemical, paper, food, and electronics industries.
16, rotary vane vacuum pump
Working principle: The rotary vane of the rotary vane pump divides the crescent-shaped space enclosed by the rotor, the pump chamber and the two end caps into three parts A, B and C. When the rotor rotates in the direction of the arrow, it communicates with the suction port. The volume of space A is gradually increasing and is in the process of inhalation. The volume of the space C communicating with the exhaust port is gradually reduced, and is in the process of exhausting. The volume of the centered space B is also gradually decreasing and is in the process of compression.
Since the volume of the space A is gradually increased (i.e., expanded), the gas pressure is lowered, and the external gas pressure at the inlet of the pump is stronger than the pressure in the space A, so that the gas is sucked. When space A is isolated from the suction port, that is, to the position of space B, the gas begins to be compressed, the volume is gradually reduced, and finally communicates with the exhaust port. When the compressed gas exceeds the exhaust pressure, the exhaust valve is pushed away by the compressed gas, and the gas is discharged to the atmosphere through the oil layer in the oil tank. Continuous operation of the pump achieves the purpose of continuous pumping. If the exhausted gas passes through the air passage and is transferred to another stage (low vacuum level), it is pumped away by the low vacuum stage, and then compressed by the low vacuum stage and discharged to the atmosphere, which constitutes a two-stage pump. At this time, the total compression ratio is borne by two stages, thereby increasing the ultimate vacuum.
Performance characteristics of rotary vane vacuum pump:
The rotary vane vacuum pump is an oil-sealed mechanical vacuum pump. It is a low vacuum pump that can be used alone or as a foreline pump for other high vacuum pumps or ultra high vacuum pumps. Widely used in metallurgy, machinery, military, electronics, chemical, light industry, petroleum and pharmaceutical production and scientific research departments.
Small size, light weight and low noise;
It is equipped with a gas ballast valve to remove a small amount of water vapor;
With automatic anti-return oil check valve, easy to start;
The air inlet shall be continuously and smoothly operated in the atmosphere for no more than one minute;
It is not suitable for removing gases that are corrosive to metals, chemically reacting to pump oil, containing particulate dust, and oxygen-containing, explosive, toxic gases.
17, gas booster pump
Working principle: The air booster pump is powered by compressed air, and the low pressure gas pressure is increased and then continuously output. The final output pressure can be increased to twice or even tens of times the power source pressure. It is a pollution-free gas booster. .
According to the output pressure and structure, it is divided into a low pressure pump and a high pressure pump.
The low-pressure pump is mainly used to maintain the normal operation of the pneumatic device when the pressure of the air source on the site is insufficient or unstable, and the minimum service pressure of the pneumatic device cannot be ensured, and meet the local high-pressure gas requirement of the equipment.
The high-pressure pump is mainly used for pressurizing non-common compressed air, such as pressurizing nitrogen, helium , argon, etc. to several tens of MPa and loading it into a high-pressure gas storage tank.
Performance characteristics of the air booster pump:
The working pressure range is large, different types of pumps can be used to obtain different pressure zones, and the input air pressure output air pressure can be adjusted accordingly. Extremely high pressure, 90Mpa gas
The flow range is wide, and it can work smoothly with only 0.1Kg of air pressure for all types of pumps. At this time, the minimum flow rate is obtained, and the flow rate can be adjusted to obtain different flow rates.
Easy to control, from simple manual control to full automatic control.
Automatic restart, for any reason, the pressure of the pressure-holding circuit drops, it will automatically restart, supplement the leakage pressure, and keep the circuit pressure constant.
Safe operation, gas driven, no arc and spark, can be used in hazardous situations.
The maximum energy saving is up to 70%, because maintaining pressure does not consume any energy.
18, gas-liquid booster pump
Working principle: The gas-liquid booster pump continuously discharges the liquid by the high-pressure plunger controlled by the check valve. The outlet pressure of the booster pump is related to the air driving pressure. When the pressure between the drive section and the output liquid section is balanced, the booster pump will stop running and no longer consume air. When the output pressure drops or the air drive pressure increases, the booster pump will automatically start running until it automatically stops after reaching the pressure balance again.
The single air-controlled unbalanced gas distribution valve is used to realize the automatic reciprocating motion of the pump, and the gas drive part of the pump body is made of aluminum alloy. The wetted parts are made of carbon steel or stainless steel according to the medium. The complete set of seals of the pump are imported high quality products, thus ensuring the performance of the gas-liquid booster pump.
Performance characteristics of gas-liquid booster pump:
High output pressure: liquid pump up to 640MPa, air pump up to 200MPa
Wide range of applications: The working medium can be hydraulic oil, water and most chemically corrosive liquids, and it has high reliability and long maintenance-free life.
Wide range of output flow: For all models, only a small drive air pressure is required to work smoothly. At this time, a small flow rate is obtained, and the flow rate can be adjusted to obtain different flow rates.
Flexible application: Different pressure zones are available with different types of pumps.
Easy to adjust: Adjust the regulating valve to adjust the intake pressure within the pressure range of the pump, and the output hydraulic pressure is adjusted accordingly.
Automatic pressure holding: If the pressure of the pressure holding circuit drops due to any reason, it will start automatically, supplement the leakage pressure and keep the circuit pressure constant.
Operational safety: It is driven by gas, without arc and spark, and can be used in hazardous places.
19. Steam jet pump
Working principle: When the steam jet pump enters the nozzle, the steam is sprayed at a high speed to generate a low pressure. The gas is sucked in and mixed in the mixing chamber. After the tube is enlarged, the kinetic energy is converted into pressure energy. If the inhaled gas comes from the container and the container is depressurized, it can be called a jet vacuum pump.
The pump has no mechanical movement and is not restricted by friction, lubrication, vibration, etc., so it can be made into a pump with a large pumping capacity. As long as the structural material of the pump is properly selected, it is extremely advantageous for eliminating corrosive gases, gases containing mechanical impurities, and steaming.
The structure is simple, the weight is light, and the floor space is small.
The working steam pressure is 4 to 9×105 Pa, and it has such a water vapor source in general metallurgical, chemical, pharmaceutical and other enterprises.
The pump is a machine that transports fluid or pressurizes the fluid. It is mainly used to transport water, oil, pulp, acid and alkali, emulsion, suspoemulsion, gas mixture and liquid metal. It is a common transportation in the mining, chemical and metallurgical industries. Equipment, the following small series for everyone to organize 19 kinds of pumps (gear pump, centrifugal pump, screw pump, reciprocating pump, piston pump, hydraulic piston pump, mud pump, pneumatic diaphragm pump, axial flow pump, self-priming pump, vortex Dynamic working principle and characteristics of pumps, water ring vacuum pumps, Roots vacuum pumps, rotary vane vacuum pumps, gas booster pumps, gas-liquid booster pumps, steam jet pumps, etc., in order to optimize the selection and use of pumps for everyone. Have some help.
1, gear pump
Working principle: the teeth of the two gears of the gear pump are separated from each other to form a low pressure, the liquid is sucked in, and sent to the other side along the wall of the casing. The other two gears are closed to each other to form a high pressure to discharge the liquid.
Advantages: simple and compact structure, small size, light weight, good processability, low price, strong self-suction, insensitive to oil pollution, large speed range, impact resistance load, convenient maintenance and reliable operation.
Disadvantages: radial force imbalance, large flow artery, high noise, low efficiency, poor interchangeability of parts, difficult to repair after wear, can not be used for variable pump.
2, centrifugal pump
Working principle: When the centrifugal pump is working, the liquid fills the pump casing, the impeller rotates at high speed, the liquid generates high speed under the action of centrifugal force, and the high-speed liquid passes through the gradually enlarged pump casing passage.
The dynamic head is converted into a static head.
Performance characteristics:
Energy efficient: The pump has an efficient hydraulic line and high efficiency.
Convenient installation and maintenance: vertical pipeline structure, the inlet and outlet of the pump can be installed in any position and any direction of the pipeline like a valve, and the installation and maintenance are extremely convenient.
Smooth operation, safe and reliable: the motor shaft and the pump shaft are coaxial and directly connected, with high concentricity, stable operation, safe and reliable.
Stainless steel bushing: The sealing position of the shaft is relatively easy to be rusted. Once the direct-coupled pump shaft is rusted, it is easy to cause mechanical seal failure. Inlay with stainless steel bushings to avoid rust, improve shaft life and reduce operating and maintenance costs.
Bearing: The lower shaft end bearing of the motor equipped with the pump adopts closed bearing. When it is used normally, the maintenance of the motor bearing is avoided.
Machine seal: The mechanical seal base is generally made of rubber bellows structure. The seal on the shaft of the traditional mechanical seal is changed from the line seal of the O-ring to the two-face seal of the rubber part, which improves the sealing effect in the clear water medium.
3, multi-stage centrifugal pump
Working principle: Compared with single-stage pump, the multi-stage centrifugal pump has the difference that the multi-stage pump has more than two impellers, which can absorb water and pressure water in multiple stages in stages, thereby lifting the water to a high position. The lift can increase or decrease the number of stages of the pump impeller as needed.
The multi-stage centrifugal pump has two types: vertical and horizontal. The pump shaft of the multi-stage centrifugal pump is equipped with two impellers in series, which can achieve a higher lift than a single-stage centrifugal pump.
Performance characteristics: Multi-stage pumps are mainly used for mine drainage, urban and factory water supply. Compared with reciprocating pumps such as piston pumps and diaphragm pumps, a large flow rate can also be pumped. The multi-stage centrifugal pump has high efficiency and can meet the needs of high lift and high flow conditions, and has been widely used in petrochemical, chemical, electric power, construction, fire protection and other industries.
Due to its particularity, multistage centrifugal pumps have different and higher technical requirements in terms of design, use and maintenance than single-stage centrifugal pumps.
4, screw pump
Working principle: The twin-screw pump is very similar to the gear pump. One screw rotates to drive the other screw. The liquid is intercepted in the meshing chamber, propelled along the rod axis, and then squeezed toward the center to discharge.
Advantages of the screw pump:
Wide pressure and flow range. The pressure is about 3.4-340 kgf/cm2, and the flow rate can reach 100cm3/min;
The range and viscosity of the liquid to be transported are wide, and the concentrator can be used to transport collectors, flocculants, etc.
Because the inertial force of the rotating parts in the pump is low, a very high speed can be used;
Good inhalation performance and self-priming ability;
The flow rate is uniform and continuous, the vibration is small, and the noise is low;
Less sensitive to incoming gases and dirt than other rotary pumps;
The structure is solid and easy to install and maintain.
Disadvantages of the screw pump: The processing and assembly requirements of the screw are high; the performance of the pump is sensitive to the viscosity change of the liquid.
5, reciprocating pump
Working principle: When the reciprocating pump works, the piston moves to the right, the pressure in the chamber decreases, the upper valve is pressed down, the lower valve is lifted up, the liquid is sucked in; the piston is moved to the left, the pressure in the chamber is increased, and the upper valve is lifted up, and the lower valve is pressed. The liquid is discharged.
Advantages of the reciprocating pump:
High discharge pressure can be obtained, and the flow rate is independent of pressure, the suction performance is good, and the efficiency is high, wherein the steam reciprocating pump can reach 80%~95%;
In principle, any medium can be transported, almost independent of the physical or chemical properties of the medium;
The performance of the pump does not vary with changes in pressure and viscosity of the delivery medium.
Disadvantages of reciprocating pumps: The flow rate is not very stable. The same flow rate is larger than the centrifugal pump; the mechanism is complicated; the amount of funds is large; it is not easy to repair.
6, double action reciprocating pump
Working principle: When the double-action reciprocating pump works, the piston moves to the right, the bottom left absorbs the liquid, and the upper right drains. The piston is moved to the left, the bottom right is aspirated, and the upper left is drained. The piston reciprocates once, and it has two suctions and discharges, and the flow rate is more uniform.
7, piston pump
Working principle: The piston pump is also called electric reciprocating pump. It is divided into single cylinder and multi cylinder from the structure. When the piston pump is working, the internal volume of the cylinder is repeatedly changed by the reciprocating action of the piston in the cylinder to suck and discharge the fluid.
Performance characteristics of the piston pump:
The piston pump is suitable for high pressure and small flow, especially when the flow rate is less than 100m3/h, and the discharge pressure is greater than 9.8 MPa, which shows its high efficiency and good running performance.
It has good inhalation performance and can pump liquids of different media and different viscosities. It can be used for oil field, coal seam water injection, oil injection and oil recovery. Corrosive liquids can be transported if the flow-through components are stainless steel. In addition, depending on the material of the structure, high-temperature tar, slime, high-concentration mortar, high-viscosity liquid, etc. can also be transported.
Piston pumps are widely used in the petrochemical industry, machinery manufacturing industry, papermaking, food processing, and pharmaceutical production.
8, hydraulic piston pump
Working principle: hydraulic piston pump or solid pump, hydraulic hydraulic cylinder drives hydraulic cylinder, hydraulic cylinder pushes the conveying cylinder, and the material in the conveying cylinder is output to the pipeline.
Generally divided into single plunger and double plunger, the basic principle of the plunger pump is very simple. This pump uses the momentum of a relatively large moving water body to pump a relatively small volume of water to a high point.
Hydraulic piston pumps are widely used in sewage treatment, solid waste treatment, mining metallurgy, dredging, dredging, petrochemical, power plants, cement industry and other fields.
9, mud pump
Working principle: The commonly used mud pump is piston type or plunger type. The crankshaft of the pump is driven by the power machine. The crankshaft drives the piston or plunger to reciprocate in the pump cylinder through the crosshead. Under the alternating action of the suction and discharge valves, the purpose of pumping and circulating the flushing liquid is achieved.
Mud pump refers to the machine that transports mud or water and other flushing fluid into the borehole during drilling, and is an important part of drilling equipment.
In the commonly used positive circulation drilling, the surface flushing medium—clear water, mud or polymer flushing liquid is directly sent to the bottom end of the drill bit through a high-pressure hose, faucet and drill rod center hole under a certain pressure to achieve cooling. The drill bit removes and transports the cutting debris to the surface.
10, pneumatic diaphragm pump
Working principle: When the pneumatic diaphragm pump is working, in order to make the living column not directly contact with the corrosive liquid, the cylinder cavity and the liquid material are separated by a diaphragm, which is also the principle of the reciprocating pump. The pneumatic diaphragm pump is available in four materials: engineering plastics, aluminum alloys, cast iron, and stainless steel.
Performance characteristics of pneumatic diaphragm pump
Compressed air is used as a power source for a variety of corrosive liquids. Different materials can be used according to different liquid media to meet the needs of different users.
The pump will not overheat: the compressed air is used as the power, and it is a process of expansion and heat absorption when exhausting. The temperature of the pneumatic pump is reduced when working, and no harmful gas is discharged.
No sparks are generated: the pneumatic diaphragm pump does not use electricity for power, and prevents static sparks after grounding.
It can pass through the liquid containing particles: because it is volumetric and the inlet is a ball valve, it is not easy to be blocked.
The shearing force on the material is extremely low: how to suck in when working, so the agitation of the material is minimal, suitable for the transport of unstable materials.
The flow rate is adjustable and a throttle valve can be added to the material outlet to regulate the flow.
Has the function of self-priming.
It can run empty without danger.
Can work diving.
The fluids that can be transported are extremely wide, from low viscosity to high viscosity, and viscous from corrosive.
No complicated control system, no cables, fuses, etc.
Small size, light weight and easy to move.
No lubrication is required, so maintenance is easy and there is no pollution to the working environment due to dripping.
The pump is always efficient and does not degrade due to wear.
100% energy utilization, when the outlet is closed, the pump automatically stops, the equipment moves, wears, overloads, heats up
No dynamic seals, easy maintenance and avoid leakage. There is no dead point when working.
11, axial flow pipe pump
Working principle: The impeller of the axial flow pump is designed to be axial flow, and the rotation speed is very high. If the motor power, the impeller diameter and the pipe diameter are large enough, the flow rate can be large.
Performance characteristics of axial flow pump:
The pipeline pump has compact structure, integrated pump and small volume, and its vertical structure has small installation area, stable operation and no adjustment for installation.
The pump inlet and outlet are designed to have the same flange and are located in the same center. They can be directly installed on the pipeline like a valve, and the center is low, which is convenient for pipeline layout and easy to install.
The pump is coaxial with the motor and has a short axial dimension, which makes the pump run more smoothly and with low noise.
The traditional shaft sealing method is eliminated, and the leakage of the conveying medium is avoided, so that it has a remarkable characteristic of no leakage at all.
12, self-priming pump
Working principle: Before the pump starts, fill the pump casing with water (or water in the pump casing). After the start, the impeller rotates at a high speed to make the water in the impeller channel flow toward the volute. At this time, the inlet forms a vacuum, so that the inlet water stops the door, and the air in the suction pipe enters the pump and reaches the outer edge through the impeller channel.
Self-priming pump performance characteristics:
The self-priming pump is a self-priming centrifugal pump, which has the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long service life and strong self-priming capability.
The pipeline does not need to be installed with a bottom valve. It is only necessary to ensure that the pump body has a quantitative liquid before the work. Different materials can be self-priming pumps of different materials.
13, vortex pump
Working principle: the liquid in the groove of the vane of the vortex pump is centrifugally forced to the flow channel for one pressurization; the liquid in the flow channel is decomposed by the liquid in the trough to form a low pressure, enter the groove again, and pressurize again; The groove has a vortex motion of a groove, so that a higher pressure head is obtained.
Advantages of the vortex pump:
W type single-stage direct-connect vortex pump is used for sucking clean water or liquid with physical and chemical properties similar to water. The liquid temperature is not more than 60 °C, which is often used for boiler feed water, in shipbuilding, textile, chemical, metallurgy, Machinery manufacturing, aquaculture, fixed fire control, heat exchanger groups, agricultural remote sprinklers, etc. have a wide range of applications.
The small size and light weight of the vortex pump have great advantages in marine installations. Self-priming with self-priming or with simple means.
It has a steep drop characteristic curve and is therefore insensitive to pressure fluctuations in the system. Some vortex pumps allow for vapor-liquid mixing. This is of great significance for the pumping of volatile liquids containing gases and high temperature liquids with high vaporization pressures.
The vortex pump has a simple structure, and the casting and processing processes are easy to implement. Some vortex pump parts can also use non-metallic materials such as plastic and nylon molded impellers.
Disadvantages of the vortex pump:
The efficiency is low, up to 55%, and most vortex pumps are 20-40% efficient, thus hindering their development toward high power.
The cavitation performance of the vortex pump is poor.
Vortex pumps cannot be used to pump more viscous media. As the viscosity of the liquid increases, the lift and efficiency of the pump drop sharply, and the viscosity of the medium is limited to 114 centistokes.
The stricter radial clearance and axial clearance between the vortex pump impeller and the pump body imposes certain difficulties on the machining and assembly process.
抽é€çš„介质åªé™äºŽçº¯å‡€çš„液体。当液体ä¸å«æœ‰å›ºä½“é¢—ç²’æ—¶ï¼Œå°±ä¼šå› ç£¨æŸå¼•èµ·è½´å‘和径å‘的间隙增大而é™ä½Žæ³µçš„性能或导致旋涡泵ä¸èƒ½å·¥ä½œã€‚
14ã€æ°´çŽ¯å¼çœŸç©ºæ³µ
工作原ç†ï¼šæ°´çŽ¯å¼çœŸç©ºæ³µå¶ç‰‡çš„å¶è½®å心地装在圆柱形泵壳内。泵内注入一定é‡çš„水。å¶è½®æ—‹è½¬æ—¶ï¼Œå°†æ°´ç”©è‡³æ³µå£³å½¢æˆä¸€ä¸ªæ°´çŽ¯ï¼ŒçŽ¯çš„内表é¢ä¸Žå¶è½®è½®æ¯‚相切。由于泵壳与å¶è½®ä¸åŒå¿ƒï¼Œå³åŠè½®æ¯‚与水环间的进气空间4é€æ¸æ‰©å¤§ï¼Œä»Žè€Œå½¢æˆçœŸç©ºï¼Œä½¿æ°”体ç»è¿›æ°”管进入泵内进气空间。éšåŽæ°”体进入左åŠéƒ¨ï¼Œç”±äºŽæ¯‚环之间容积被é€æ¸åŽ‹ç¼©è€Œå¢žé«˜äº†åŽ‹å¼ºï¼ŒäºŽæ˜¯æ°”体ç»æŽ’气空间åŠæŽ’气管被排至泵外。
水环å¼çœŸç©ºæ³µçš„优点：
结构简å•ï¼Œåˆ¶é€ 精度è¦æ±‚ä¸é«˜ï¼Œå®¹æ˜“åŠ å·¥ã€‚
结构紧凑，泵的转数较高，一般å¯ä¸Žç”µåŠ¨æœºç›´è”ï¼Œæ— é¡»å‡é€Ÿè£…置。故用å°çš„结构尺寸，å¯ä»¥èŽ·å¾—大的排气é‡ï¼Œå 地é¢ç§¯ä¹Ÿå°ã€‚
压缩气体基本上是ç‰æ¸©çš„，å³åŽ‹ç¼©æ°”体过程温度å˜åŒ–很å°ã€‚
由于泵腔内没有金属磨擦表é¢ï¼Œæ— 须对泵内进行润滑，而且磨æŸå¾ˆå°ã€‚转动件和固定件之间的密å°å¯ç›´æŽ¥ç”±æ°´å°æ¥å®Œæˆã€‚
å¸æ°”å‡åŒ€ï¼Œå·¥ä½œå¹³ç¨³å¯é ，æ“作简å•ï¼Œç»´ä¿®æ–¹ä¾¿ã€‚
水环å¼çœŸç©ºæ³µçš„缺点：
效率低，一般在30%å·¦å³ï¼Œè¾ƒå¥½çš„å¯è¾¾50%。
真空度低，这ä¸ä»…æ˜¯å› ä¸ºå—到结构上的é™åˆ¶ï¼Œæ›´é‡è¦çš„是å—工作液饱和蒸气压的é™åˆ¶ã€‚用水作工作液，æžé™åŽ‹å¼ºåªèƒ½è¾¾åˆ°2000~4000Pa。用油作工作液，å¯è¾¾130Pa。
总之，由于水环泵ä¸æ°”体压缩是ç‰æ¸©çš„，故å¯ä»¥æŠ½é™¤æ˜“燃ã€æ˜“爆的气体。由于没有排气阀åŠæ‘©æ“¦è¡¨é¢ï¼Œæ•…å¯ä»¥æŠ½é™¤å¸¦å°˜åŸƒçš„气体ã€å¯å‡æ€§æ°”体和气水混åˆç‰©ã€‚有了这些çªå‡ºçš„特点，尽管它效率低，ä»ç„¶å¾—到了广泛的应用。
15ã€ç½—茨真空泵
工作原ç†ï¼šç½—茨泵的工作原ç†ä¸Žç½—茨鼓风机相似。由于转åçš„ä¸æ–旋转，被抽气体从进气å£å¸å…¥åˆ°è½¬å与泵壳之间的空间v0内，å†ç»æŽ’æ°”å£æŽ’出。由于å¸æ°”åŽv0空间是全å°é—状æ€ï¼Œæ‰€ä»¥ï¼Œåœ¨æ³µè…”内气体没有压缩和膨胀。但当转å顶部转过排气å£è¾¹ç¼˜ï¼Œv0空间与排气侧相通时，由于排气侧气体压强较高，则有一部分气体返冲到空间v0ä¸åŽ»ï¼Œä½¿æ°”体压强çªç„¶å¢žé«˜ã€‚当转å继ç»è½¬åŠ¨æ—¶ï¼Œæ°”体排出泵外。
罗茨泵具有以下特点：
在较宽的压强范围内有较大的抽速;
起动快，能立å³å·¥ä½œ;
对被抽气体ä¸å«æœ‰çš„ç°å°˜å’Œæ°´è’¸æ°”ä¸æ•æ„Ÿ;
转åä¸å¿…æ¶¦æ»‘ï¼Œæ³µè…”å†…æ— æ²¹;
振动å°ï¼Œè½¬å动平衡æ¡ä»¶è¾ƒå¥½ï¼Œæ²¡æœ‰æŽ’气阀;
驱动功率å°ï¼Œæœºæ¢°æ‘©æ“¦æŸå¤±å°;
结构紧凑，å 地é¢ç§¯å°;
è¿è½¬ç»´æŠ¤è´¹ç”¨ä½Žã€‚
å› æ¤ï¼Œç½—茨泵在冶金ã€çŸ³æ²¹åŒ–å·¥ã€é€ 纸ã€é£Ÿå“ã€ç”µå工业部门得到广泛的应用。
16ã€æ—‹ç‰‡å¼çœŸç©ºæ³µ
工作原ç†ï¼šæ—‹ç‰‡æ³µçš„旋片把转åã€æ³µè…”和两个端盖所围æˆçš„月牙形空间分隔æˆAã€Bã€C三部分，当转å按ç®å¤´æ–¹å‘旋转时，与å¸æ°”å£ç›¸é€šçš„空间A的容积是é€æ¸å¢žå¤§çš„，æ£å¤„于å¸æ°”过程。而与排气å£ç›¸é€šçš„空间C的容积是é€æ¸ç¼©å°çš„，æ£å¤„于排气过程。居ä¸çš„空间B的容积也是é€æ¸å‡å°çš„，æ£å¤„于压缩过程。
由于空间A的容积是é€æ¸å¢žå¤§(å³è†¨èƒ€)，气体压强é™ä½Žï¼Œæ³µçš„å…¥å£å¤„外部气体压强大于空间Aå†…çš„åŽ‹å¼ºï¼Œå› æ¤å°†æ°”体å¸å…¥ã€‚当空间A与å¸æ°”å£éš”ç»æ—¶ï¼Œå³è½¬è‡³ç©ºé—´Bçš„ä½ç½®ï¼Œæ°”体开始被压缩，容积é€æ¸ç¼©å°ï¼Œæœ€åŽä¸ŽæŽ’æ°”å£ç›¸é€šã€‚当被压缩气体超过排气压强时，排气阀被压缩气体推开，气体穿过油箱内的油层排至大气ä¸ã€‚由泵的连ç»è¿è½¬ï¼Œè¾¾åˆ°è¿žç»æŠ½æ°”的目的。如果排出的气体通过气é“而转入å¦ä¸€çº§(低真空级)，由低真空级抽走，å†ç»ä½ŽçœŸç©ºçº§åŽ‹ç¼©åŽæŽ’至大气ä¸ï¼Œå³ç»„æˆäº†åŒçº§æ³µã€‚这时总的压缩比由两级æ¥è´Ÿæ‹…ï¼Œå› è€Œæ高了æžé™çœŸç©ºåº¦ã€‚
旋片å¼çœŸç©ºæ³µçš„性能特点：
旋片å¼çœŸç©ºæ³µæ˜¯ä¸€ç§æ²¹å°å¼æœºæ¢°çœŸç©ºæ³µï¼Œå±žäºŽä½ŽçœŸç©ºæ³µï¼Œå¯å•ç‹¬ä½¿ç”¨ï¼Œä¹Ÿå¯ä½œä¸ºå…¶å®ƒé«˜çœŸç©ºæ³µæˆ–超高真空泵的å‰çº§æ³µã€‚广泛地应用于冶金ã€æœºæ¢°ã€å†›å·¥ã€ç”µåã€åŒ–å·¥ã€è½»å·¥ã€çŸ³æ²¹åŠåŒ»è¯ç‰ç”Ÿäº§å’Œç§‘ç ”éƒ¨é—¨ã€‚
体积å°ã€é‡é‡è½»ã€å™ªéŸ³ä½Ž;
设有气镇阀，å¯æŠ½é™¤å°‘é‡æ°´è’¸æ°”;
设有自动防返油æ¢å›žé˜€ï¼Œå¯åŠ¨æ–¹ä¾¿;
进气å£è¿žç»ç•…通大气è¿è½¬ä¸å¾—超过一分ç§;
ä¸é€‚用于抽除对金属有è…蚀的，对泵油起化å¦å应的，å«æœ‰é¢—粒尘埃的气体，以åŠå«æ°§è¿‡é«˜çš„，有爆炸性的，有毒的气体。
17ã€æ°”气增压泵
工作原ç†ï¼šæ°”气增压泵以压缩空气为动力，将低压气体压力å‡é«˜åŽè¿žç»è¾“出，最终输出压力å¯å‡é«˜è‡³åŠ¨åŠ›æºåŽ‹åŠ›çš„两å€ç”šè‡³æ•°åå€ï¼Œæ˜¯æ— 污染的气体增压装置。
æ ¹æ®è¾“出压力和结构形å¼åˆåˆ†æˆä½ŽåŽ‹æ³µå’Œé«˜åŽ‹æ³µã€‚
低压泵主è¦ç”¨äºŽå½“现场气æºåŽ‹åŠ›ä¸è¶³æˆ–ä¸ç¨³å®šï¼Œä¸èƒ½ä¿è¯æ°”动装置的最低使用压力时，维æŒæ°”动装置æ£å¸¸å·¥ä½œï¼Œæ»¡è¶³è®¾å¤‡çš„局部高压用气è¦æ±‚。
高压泵主è¦ç”¨äºŽå¢žåŽ‹éžæ™®é€šåŽ‹ç¼©ç©ºæ°”场åˆï¼Œå¦‚把氮气ã€æ°¦æ°”ã€æ°©æ°”ç‰å¢žåŽ‹è‡³å‡ å兆帕并装入高压储气ç½ã€‚
气气增压泵的性能特点：
工作压力范围大，选用ä¸åŒåž‹å·çš„æ³µå¯èŽ·å¾—ä¸åŒçš„压力区域，调节输入气压输出气压相应得到调整。å¯è¾¾åˆ°æžé«˜çš„压力，气体90Mpa
æµé‡èŒƒå›´å¹¿ï¼Œå¯¹æ‰€æœ‰åž‹å·æ³µä»…0.1Kg气压就能平稳工作，æ¤æ—¶èŽ·å¾—最å°çš„æµé‡ï¼Œè°ƒèŠ‚进气é‡åŽå¯å¾—到ä¸åŒçš„æµé‡ã€‚
易于控制，从简å•çš„手动控制到完全的自动控制å‡å¯æ»¡è¶³è¦æ±‚。
自动é‡æ–°å¯åŠ¨ï¼Œæ— 论何ç§åŽŸå› é€ æˆä¿åŽ‹å›žè·¯åŽ‹åŠ›ä¸‹é™ï¼Œå°†è‡ªåŠ¨é‡æ–°å¯åŠ¨ï¼Œè¡¥å……泄æ¼åŽ‹åŠ›ï¼Œä¿æŒå›žè·¯åŽ‹åŠ›æ’定。
æ“ä½œå®‰å…¨ï¼Œé‡‡ç”¨æ°”ä½“é©±åŠ¨ï¼Œæ— ç”µå¼§åŠç«èŠ±ï¼Œå¯åœ¨å±é™©åœºåˆä½¿ç”¨ã€‚
最大节能å¯è¾¾70%ï¼Œå› ä¸ºä¿æŒä¿åŽ‹ä¸æ¶ˆè€—任何能é‡ã€‚
18ã€æ°”液增压泵
工作原ç†ï¼šæ°”液增压泵由å•å‘阀控制的高压柱塞ä¸æ–的将液体排出，增压泵的出å£åŽ‹åŠ›å¤§å°ä¸Žç©ºæ°”驱动压力有关。当驱动部分和输出液体部分之间的压力达到平衡时，增压泵会åœæ¢è¿è¡Œï¼Œä¸å†æ¶ˆè€—空气。当输出压力下é™æˆ–ç©ºæ°”é©±åŠ¨åŽ‹åŠ›å¢žåŠ æ—¶ï¼Œå¢žåŽ‹æ³µä¼šè‡ªåŠ¨å¯åŠ¨è¿è¡Œï¼Œç›´åˆ°å†æ¬¡è¾¾åˆ°åŽ‹åŠ›å¹³è¡¡åŽè‡ªåŠ¨åœæ¢ã€‚
采用å•æ°”控éžå¹³è¡¡æ°”体分é…阀æ¥å®žçŽ°æ³µçš„自动往å¤è¿åŠ¨ï¼Œæ³µä½“气驱部分采用é“åˆé‡‘åˆ¶é€ ã€‚æŽ¥æ¶²éƒ¨åˆ†æ ¹æ®ä»‹è´¨ä¸åŒé€‰ç”¨ç¢³é’¢æˆ–ä¸é”ˆé’¢ï¼Œæ³µçš„全套密å°ä»¶å‡ä¸ºè¿›å£ä¼˜è´¨äº§å“，从而ä¿è¯äº†æ°”液增压泵的性能。
气液增压泵的性能特点：
输出压力高：液泵最大å¯è¾¾640MPa，气泵最大å¯è‡³200MPa
使用范围广：工作介质å¯ä¸ºæ¶²åŽ‹æ²¹.æ°´åŠå¤§éƒ¨åˆ†åŒ–å¦è…蚀性液体，而且å¯é 性高，å…维护寿命长。
输出æµé‡èŒƒå›´å¹¿ï¼šå¯¹æ‰€æœ‰åž‹å·æ³µä»…需较å°é©±åŠ¨æ°”压就能平稳工作，æ¤æ—¶èŽ·å¾—较å°æµé‡ï¼Œè°ƒèŠ‚驱动进气é‡åŽå¯èŽ·å¾—ä¸åŒæµé‡ã€‚
应用çµæ´»ï¼šé€‰ç”¨ä¸åŒåž‹å·çš„泵，å¯èŽ·å¾—ä¸åŒçš„压力区域。
æ˜“äºŽè°ƒèŠ‚ï¼šåœ¨æ³µçš„åŽ‹åŠ›èŒƒå›´å†…ï¼Œè°ƒèŠ‚è°ƒèŠ‚é˜€ä»Žè€Œè°ƒèŠ‚è¿›æ°”åŽ‹åŠ›ï¼Œè¾“å‡ºæ¶²åŽ‹ç›¸åº”ç›¸åº”å¾—åˆ°æ— æžè°ƒæ•´ã€‚
自动ä¿åŽ‹ï¼šæ— 论何ç§åŽŸå› é€ æˆä¿åŽ‹å›žè·¯åŽ‹åŠ›ä¸‹é™ï¼Œå°†è‡ªåŠ¨å¯åŠ¨ï¼Œè¡¥å……泄æ¼åŽ‹åŠ›ï¼Œä¿æŒå›žè·¯åŽ‹åŠ›æ’定。
æ“ä½œå®‰å…¨ï¼šé‡‡ç”¨æ°”ä½“é©±åŠ¨ï¼Œæ— ç”µå¼§åŠç«èŠ±ï¼Œå¯åœ¨å±é™©åœºæ‰€ä½¿ç”¨ã€‚
19ã€è’¸æ±½å–·å°„æ³µ
工作原ç†ï¼šè’¸æ±½å–·å°„泵工作时蒸汽进入喷嘴åŽï¼Œé«˜é€Ÿå–·å‡ºï¼Œäº§ç”Ÿä½ŽåŽ‹ï¼Œå°†æ°”体å¸å…¥å¹¶åœ¨æ··åˆå®¤æ··åˆï¼Œç»æ‰©å¤§ç®¡åŽï¼ŒåŠ¨èƒ½è½¬å˜ä¸ºåŽ‹å¼ºèƒ½ã€‚如果å¸å…¥çš„气体æ¥è‡ªå®¹å™¨ï¼Œå®¹å™¨å‡åŽ‹ï¼Œå³å¯ç§°ä½œå–·å°„真空泵。
蒸汽喷射泵的性能特点：
è¯¥æ³µæ— æœºæ¢°è¿åŠ¨éƒ¨åˆ†ï¼Œä¸å—摩擦ã€æ¶¦æ»‘ã€æŒ¯åŠ¨ç‰æ¡ä»¶é™åˆ¶ï¼Œå› æ¤å¯åˆ¶æˆæŠ½æ°”能力很大的泵。åªè¦æ³µçš„结构æ料选择适当，对于排除具有è…蚀性气体ã€å«æœ‰æœºæ¢°æ‚质的气体以åŠæ°´è’¸ç‰åœºåˆæžä¸ºæœ‰åˆ©ã€‚
结构简å•ã€é‡é‡è½»ï¼Œå 地é¢ç§¯å°ã€‚
工作蒸汽压力为4～9×105Pa，在一般的冶金ã€åŒ–å·¥ã€åŒ»è¯ç‰ä¼ä¸šä¸éƒ½å…·å¤‡è¿™æ ·çš„水蒸汽æºã€‚
Aluminum PP Caps Making Machine
Aluminum PP Cap Making Machine, Bottle cap Making Machine, ROPP Cap Making Machine,Aluminum PP Cap Making Machinery, Aluminium Cap and Bottle Cap Making Machine
Zhoushan Jiaolong Import And Export Co., Ltd.  , https://www.jiaolongmachinery.com