The working principle and usage method of the progressive cavity pump, the more complete the better

1.It is a single-screw [1] type transfer pump, and its main working parts are the screw (called the rotor) of the eccentric spiral body and the screw bushing (called the stator) with a double-line helix surface on the inner surface. Its working principle is that when the motor drives the pump shaft to rotate, the screw rotates around its own axis on the one hand, and on the other hand, it rolls along the inner surface of the bushing, thus forming the sealed chamber of the pump.

With the continuous rotation of the screw, the liquid in the sealing chamber is pushed forward by one pitch, and with the continuous rotation of the screw, the liquid is pressed from one sealing chamber to another in a spiral manner, and finally the pump body is extruded. Screw pump is a new type of machinery for transporting liquids, which has the advantages of simple structure, safe and reliable work, convenient use and maintenance, continuous and uniform liquid discharge, and stable pressure.

2.The working principle of the progressive cavity pump is: when the progressive cavity pump is working, the liquid is sucked in and enters the sealing space surrounded by the thread and the pump casing, when the active screw rotates, the sealing volume of the progressive cavity pump increases the pressure of the progressive cavity pump under the extrusion of the screw teeth, and moves along the axial direction.

Since the screw rotates at a constant velocity, the liquid outflow flow is also uniform.

The characteristics of the screw pump are: the screw pump has small loss and good economic performance. The pressure is high and uniform, the flow is uniform, the speed is high, and it can be directly connected with the prime mover.

The progressive cavity pump can convey lubricating oil, fuel oil, various oils and polymers, and is used to convey viscous liquids.

Conveying high viscosity media:

3.Depending on the size of the pump, it can convey media with viscosity from 37,000 to 200,000 centipoise.

Media containing particles or fibers: the diameter of the particles can be 30 mm (no more than the rotor eccentricity). The fiber length can be 350 mm (equivalent to the pitch of the rotor).

Its content can generally reach 40% of the medium cellar, and if the solid matter in the medium is fine powder, the maximum content can reach 60% or higher can also be conveyed.

When the conveying pressure is required to be stable and the inherent structure of the medium is not damaged, it is most ideal to use a single screw pump for transportation.

The working principle of a progressive cavity pump is to draw a liquid or gas from the inlet by the rotation of the screw, which is then compressed and discharged by the movement of the screw. Progressive cavity pumps are typically used to convey highly viscous liquids, high-temperature liquids, volatile liquids, and liquids containing solid particles.

The following points need to be paid attention to when using a progressive cavity pump:

1.When installing progressive cavity pumps, avoid installing them in places with high humidity or corrosive gases to prevent damage to the pump.

2.Make sure the progressive cavity pump is well grounded to prevent electrical hazards.

3.Do not operate the progressive cavity pump without proper lubrication, as this will cause damage to the pump.

4.Avoid operating the progressive cavity pump at high temperatures or pressures that exceed its rated capacity, as this will cause damage to the pump.

5.Progressive cavity pumps are cleaned and maintained regularly to prevent the accumulation of impurities and other contaminants from affecting its performance.

6.Do not disassemble or modify the progressive cavity pump without proper training or guidance, as this will cause damage to the pump or result in injury.

7.Always follow the manufacturer's instructions and guidelines for safe and correct use of progressive cavity pumps.

How does a progressive cavity pump work and what is the principle? 1 minute 3D animation, intuitive and easy to understand.

A progressive cavity pump is a type of forward displacement pump that is used to transport a variety of fluids. It is mainly composed of a screw and a stator, when working, the screw rotates, pushing the fluid from the suction end into the pump chamber, forming a seal under the action of the stator to advance along the axial direction, and finally discharged from the extrusion end.

Working principle: Suction: The screw rotates to form a certain volume, so that the medium is sucked into the pump cavity.

The screw continues to rotate to push the suction medium, and the medium is gradually compressed from the suction inlet to the pressure outlet, and the volume is gradually reduced.

Propulsion: After the suction medium is propelled by a screw, it is finally discharged from the pump body. At the same time, due to the difference in the suction pressure and discharge pressure inside the pump body, the medium moves towards the discharge outlet.

How to use: Check before installation: Before installation, you must carefully check whether all parts of the progressive cavity pump are complete, and whether there are defects such as wear, deformation, cracks, etc.

Installation and commissioning: Install the screw pump to the correct position, connect the suction pipe and the press-out pipe, and adjust the seal at the interface between the pipeline and the pump. Start the progressive cavity pump and check if there is any abnormality.

Normal use: During the normal use of the progressive cavity pump, attention should be paid to maintaining a stable working state, and replacing the worn parts and seals in time.

Maintenance: In the process of long-term use, it is necessary to maintain and maintain the screw pump, regularly check whether all parts of the screw pump are normal, and regularly replace the seals and bearings and other vulnerable parts.

Maintenance Method: Routine Maintenance: The progressive cavity pump should be cleaned and lubricated regularly to keep it running normally.

Regular Inspections: Regularly inspect pump bodies, bearings, seals, and tubing for damage or wear, and replace or repair them if necessary.

Troubleshooting: Once there is an abnormality, troubleshoot and repair in time to avoid more serious consequences.

Instructions for use: Use in strict accordance with the instructions for use to avoid damage caused by incorrect operation or improper operation.

The above is a detailed introduction to the working principle and usage method of progressive cavity pump, maintenance, etc. For users, the reasonable use and maintenance of progressive cavity pumps can effectively extend their service life and improve production efficiency.

The progressive cavity pump is a kind of rotary positive displacement pump, which has the characteristics of simple structure, small size, small flow and pressure pulsation, and stable operation. However, due to the complex manufacturing process and low service life of the screw and bushing working moving pair, it is only used for low-pressure transportation of drilling fluid with less sand content at present.

The progressing cavity pump (Fig. 11-9) consists of two parts: the power end and the hydraulic end.

1.Power end.

The main component of the power end is a bearing box 8, wherein a transmission shaft is installed with a rolling bearing. One end of the shaft is directly connected to the power input section by means of a coupling, and a clutch and transmission mechanism can also be installed in the middle of it. At the other end of the shaft, power is transmitted to the screw by a universal mechanism.

In order to prevent drilling fluid from entering the bearing housing, a sealing device is provided between the transmission shaft and the pump body.

Design and use of hydraulic power head core drilling rig.

Figure 11-9 Structural diagram of progressing cavity pump1-discharge end; 2-screw ** sub); 3-bushing; 4-universal coupling; 5-cardan shaft; 6-pump body; 7-sealing ring; 8-bearing housing; 9-drive shaft 2Fluid end.

The hydraulic end is mainly composed of 3 parts: pump body 6, stator 3 (i.e., bushing) and rotor 2 (i.e., screw). The pump body is generally made of steel castings. The rotor is placed in the stator, the front end is directly connected to the cardan shaft, and the rear end is the movable end.

The longitudinal shape of the rotor is spiral wave-like, and its cross-section is round. The rotor is the main working part of the pump, and its material is mostly wear-resistant and corrosion-resistant chromium steel. The longitudinal direction of the stator is double-headed spiral wave-like, and its cross-section is oblong.

The outer layer of the stator is a metal cylinder, and the inner layer is wear-resistant rubber. The right end of the pump body has a bearing box and a water inlet pipe, and the other end is a water outlet pipeline, and the two ends of the stator are connected into a whole with bolts.

The structure of the progressing cavity pump mainly includes 8 parts: bearing seat, transmission shaft, inlet mouth, machine seal, universal joint, stator, rotor, and outlet termination.

It is a positive displacement pump that mainly relies on the volume change of the sealing space formed by the rotor and stator to transport liquid.

At present, the technology of progressing cavity pump in China has become mature, and the progressing cavity pump manufactured by Huangshan Industrial Pump is very good, and it has been seen in many sites.

The device of the screw pump includes three parts: the prime mover, the variable speed transmission device and the screw pump, which is specifically composed of the screw vane, the pump shaft, the bearing seat and the shell. The screw pump is installed inclimatically between the upper and lower pools, and the lower blades of the screw pump are immersed below the water surface.

When the pump shaft rotates, the spiral blades push the water in the pool into the leaf groove, and the water is lifted up along the spiral shaft step by step under the action of the rotating blades of the spiral until the outlet of the screw pump. The screw pump only changes the potential energy of the fluid, which is different from the vane pump, which converts the mechanical energy into the potential energy and kinetic energy of the liquid.

The progressive cavity pump is a positive displacement pump with a unique structure, which is mainly composed of a drive motor and a reducer, a connecting rod and a connecting rod box, a stator and a rotor. When working, the rotor is driven by a motor, and the planetary rotation is made in the stator, and the elastic bushing of the rotor and stator that cooperate with each other forms several sealing cavities that are not connected with each other. Due to the rotation of the rotor, the sealing cavity moves axially from the suction end to the discharge end, and the medium is continuously transported from the suction end to the discharge end in the cavity.

The method and process of using progressive cavity pump are as follows:

Before the pump starts, open the suction and discharge valves in their entirety.

1) Start the pump for the first time or use the pump for a long time again, the input liquid should be injected, and the pump shaft should be turned several times with the help of auxiliary tools, so that the stator will not be damaged. The pump cannot be started without liquid, and the stator will be damaged if started without liquid;

2) Start the motor for a while, check the rotation direction of the pump, and confirm that it is consistent with the direction marked on the pump casing before starting the operation;

3) After starting the pump, observe whether the readings of the pressure gauge and vacuum gauge meet the requirements, pay attention to the sound and vibration of the pump, and stop the car immediately for inspection if it is found to be abnormal.

4) During the initial start-up process, the initial leakage allowed by the packing seal (especially PTFE) should be evenly adjusted during the 15 minutes of the initial start-up process. Approximately 1 8 revolutions at a time, adjusted to the lowest leakage. If the temperature of the stuffing box rises sharply and the leakage decreases sharply, the nut should be loosened immediately and the above process should be repeated;

5) When the pump is running normally, the flow is controlled by adjusting the speed.

When the progressive cavity pump is running, after the liquid is sucked in, it is put into the enclosed space surrounded by the thread and the pump casing, when the active screw rotates, the closed volume of the progressive cavity pump increases the pressure of the progressive cavity pump under the pressure of the screw teeth, and transfers along the axial direction. Because the screw rotates at the same speed, the flow of liquid out is also average.

The working principle is that the rotor rotates around the axis of the stator in the inner cavity of the stator (the radius value is the eccentricity of the rotor x2), and the rotor and the stator form a continuous suction and discharge chamber through the rubber seal, and the medium is transported from the suction end to the extrusion end with a constant speed and constant volume. The key to the quality of the pump lies in the control of the size of the stator cavity, and a good inner cavity core can increase the pressure and flow of the pump, while greatly reducing energy consumption and prolonging the service life. Yangxin County Biyang Machinery Processing Factory specializes in precision production of mold cores, and has been recognized by the industry for the upgrading of a full range of pump enterprises.

The short answer is: the rotation of the screw shaft produces spatial changes, and the material is pushed forward, imagine the spiral elevator

How does a progressive cavity pump work and what is the principle? 1 minute 3D animation, intuitive and easy to understand.

Single-screw pump is a kind of internal meshing eccentric rotary screw pump, belongs to the rotor type volumetric pump, the single-head screw rotor meshes in the stator hole cavity of the screw hole to form a number of closed cavities, when the rotor rotates around the stator shaft, these closed cavities make spiral motion, they continuously and uniformly, the volume remains unchanged from the suction end to the extrusion end, due to the rotor-stator sub-meshing sealing line, the suction cavity and the discharge cavity are effectively separated, and the rotor is not completely sliding friction movement on the inner surface of the stator hole. Therefore, it has good pump suction performance, stable pump pressure, small disturbance, and unended flow and agitation of the medium. It can convey concentrates with high viscosity and abrasive impurities and solid particles, and can also realize the mixed transportation of two-phase and three-phase media, with good pump volume adjustment performance, high efficiency and wide efficiency zone.

It is suitable for all industrial sectors with a medium temperature of 10 100 (up to 150 for special pumps) and a special structure for pumps with the highest viscosity for conveying media above it.

There are many kinds of screw pumps, and the following is a sanitary screw pump.

Working principle of sanitary progressive cavity pump:

Sanitary grade screw pumps use the rotation of the screw to suck and drain liquids. Due to the meshing of the screws and the close fit of the screws to the inner wall of the liner, one or more sealing spaces are separated between the suction and discharge outlets of the pump. With the rotation and meshing of screw, these sealing spaces are continuously formed at the suction end of pump, the liquid in the suction chamber is sealed therein, and from the suction chamber along the screw axial direction to the discharge end continuously, the liquid that is enclosed in each space is continuously discharged, just like a nut is continuously pushed forward when the thread rotates, this is when the vertical screw pump works, the liquid is sucked in and enters the sealing space surrounded by the thread and the pump casing, when the active screw rotates, The sealing volume of the progressive cavity pump increases the pressure of the progressive cavity pump under the extrusion of the screw teeth and moves in the axial direction.

Since the screw rotates at a constant velocity, the liquid outflow flow is also uniform.

How does a progressive cavity pump work and what is the principle? 1 minute 3D animation, intuitive and easy to understand.

There are many kinds of progressive cavity pumps, which one do you want to ask? However, they are all progressive cavity pumps, and the principle should be similar. The following is the principle of a sanitary progressive cavity pump, I hope it can help you.

Working principle of sanitary progressive cavity pump:

Sanitary grade screw pumps use the rotation of the screw to suck and drain liquids. Due to the meshing of the screws and the close fit of the screws to the inner wall of the liner, one or more sealing spaces are separated between the suction and discharge outlets of the pump. With the rotation and meshing of screw, these sealing spaces are continuously formed at the suction end of pump, the liquid in the suction chamber is sealed therein, and from the suction chamber along the screw axial direction to the discharge end continuously, the liquid that is enclosed in each space is continuously discharged, just like a nut is continuously pushed forward when the thread rotates, this is when the vertical screw pump works, the liquid is sucked in and enters the sealing space surrounded by the thread and the pump casing, when the active screw rotates, The sealing volume of the progressive cavity pump increases the pressure of the progressive cavity pump under the extrusion of the screw teeth and moves in the axial direction.

Since the screw rotates at a constant velocity, the liquid outflow flow is also uniform.