What is the structure of the piston pump, and the working principle of the piston pump

Disadvantages of diaphragm pumps: 1. It needs to work continuously; 2. High maintenance cost; 3. It is difficult to absorb materials, and it is easy to produce cavitation phenomenon - that is, air enters the pump (usually caused by the insufficient power of the pump to transport the coating); 4. Cannot handle high-viscosity paints (as mentioned above); 5. Must be kept clean (small moving parts); 6. It needs to be continuously maintained; 7. Hydraulic oil is easy to leak; 8. The diaphragm often fails. Piston pump disadvantages:

1. The manufacturing cost is high; 2. The purchase cost is high, and the diaphragm pump uses eccentric bearings and pistons to generate movement to drive the diaphragm movement and pressurize the coating. When the motor rotates, the eccentric bearing also rotates, and one end of the piston rests on the eccentric bearing. The rotation of the eccentric bearing causes the piston to move up and down, and when the piston goes down, the diaphragm is depressed, and the inlet valve opens to suction the material.

When the piston goes up, the membrane....

Piston pumps. It is composed of electrical part, power end, hydraulic end and transmission part. (1) The electrical part is composed of an electric power machine and an electric control box. (2) The power end consists of the power box and crankshaft.

It consists of connecting rods, bearings, crosshead bodies and seals. (3) The hydraulic end assembly is equipped with a discharge valve, a plunger, a seal, and a safety valve.

And buffers? (High pressure pumps have). (4) The transmission part is composed of large and small pulleys and a group of narrow belts and shields. This is the structure of our commonly used piston pump, and we hope to communicate more.

How it works. The main body section (see Structural Section.)

The cylinder block is driven to rotate by the transmission shaft, so that the seven plungers evenly distributed on the cylinder body rotate around the center line of the transmission shaft, and the sliding shoe in the column sliding assembly is pressed against the variable head ( through the central spring

The working principle of the piston pump: the piston pump is to make reciprocating motion in the cylinder through the plunger rod, so as to produce a pressure difference to input the fluid. Its advantages are mainly that it has a wide range of applications and can output high-pressure media; The main disadvantages are that the structure is more complex, the amount of maintenance is large, the vibration is large during operation, the noise is large, and there are many wearing parts.

Piston pumps are available in single-cylinder and multi-cylinder versions, with different structures.

The structural form of the piston pump:Piston pumps are divided into two representative structural forms: axial piston pumps and radial piston pumps; Since the radial piston pump is a new type of high-efficiency pump with relatively high technical content, with the continuous acceleration of localization, the radial piston pump will inevitably become an important part of the piston pump application field; A radial piston pump is a piston pump in which the reciprocating direction of motion of the piston or plunger is perpendicular to the drive shaft.

The working principle of the radial piston pump: the driving torque is transmitted by the drive shaft to the star-shaped hydraulic cylinder rotor through the cross coupling, and the stator is not subject to other transverse forces. The rotor is mounted on the distribution shaft.

The radially arranged plunger in the rotor is pressed against the eccentric stroke stator by means of a hydrostatically balanced sliding shoe.

Adopt double plunger structure, low pressure pulsation, long life of gem balls;

Imported gem plunger and gem ball are used to ensure accurate flow.

Communicate with the computer through the RS232 interface, which can be controlled directly by the computer;

The contact medium material is resistant to organic solvent corrosion;

Built-in overvoltage protection and flow correction system;

Large-screen LCD display;

The well-designed exhaust device effectively removes air bubbles from the conveyed liquid.

Flow rate and pressure setting can be memorized, and communication (customized) software functions can be realized with PLC.

Real-time display of current pressure, set pressure, set flow; Real-time curve display pump working pressure Flow rate and pressure can be set in two ways, fast and practical; It has a timing function, which is convenient to set the working time of the pump; The current working pressure can be saved for easy viewing; Important parameters such as the current pressure can be printed.

Advection pump (piston pump) products are widely used in petroleum exploration and development evaluation experiments, petrochemical catalytic reactions, polymerization reactions, food, pharmaceutical, liquid chromatography analysis, supercritical extraction, separation, atomic science, environmental science, process equipment, experimental equipment and micro-delivery of various liquids. The performance indicators of TBP series advection pump (piston pump) can meet the requirements of the research on the rheological characteristics of oilfield fluid seepage, fill the gap in China's equipment manufacturing in the field of related experimental technology, and reach the international advanced level of similar instruments.

The advantages are high pressure resistance, high efficiency, large transmission power, wide speed range, long life, and its disadvantages are harsh requirements for the cleanliness of the working medium, complex structure, and difficult maintenance.

The working principle of the piston pump in the hydraulic system is actually very simple, just look at this single piston pump and you will understand.

Axial piston pump is a common hydraulic pump, which is mainly composed of the following components:

Pump body: The pump body is the main part of the axial piston pump and is usually made of cast iron or steel. There are multiple plunger holes inside the pump body, and each plunger hole is equipped with components such as plunger and spring in the Chanzhou stove.

Bearings: Bearings support the rotation of the pump body and rotor, usually rolling or plain bearings.

Shaft seal: The shaft seal is located between the pump body and the rotor and is used to prevent liquid leakage. Shaft seals are typically packed, mechanical, or rotary seals.

Plunger: The plunger is the core component of an axial piston pump and is primarily used to push the flow of liquids. Plungers are usually made of hard materials such as ceramic, alloys, etc.

Rotor: The rotor is the rotating part of an axial piston pump and consists of a shaft and vanes. As the rotor rotates, the blades interact with the plunger, pushing the liquid to the outlet.

Interface: The inlet and outlet of axial piston pumps are usually in the form of threaded interfaces, flange interfaces, etc., to facilitate the connection of piping and other system components.

To sum up, the axial piston pump is mainly composed of pump body, bearing trace, shaft seal, plunger, rotor and interface. These components work together to enable axial piston pumps to provide liquid power and meet the requirements of different hydraulic systems.

Piston pump is a screw hydraulic pump composed of plunger, pump casing, inlet and outlet, bearing seat, seal, shaft seal, gear and drive device. The working principle of the piston pump is that when the screw rises, the fluid is fed from the pump head into the pump casing, and when the screw is lowered, the fluid is discharged from the pump casing with the pump head.

1. Gear pump.

The size is small, the structure is simple, the cleanliness of the oil is not strict, and it is cheaper; However, the auspicious section of the pump shaft is not balanced, and the wear is serious and the leakage is large.

2. Vane pump.

It is divided into double-acting vane pumps and single-acting vane pumps. This kind of pump has uniform flow, stable operation, low noise, higher working pressure and volumetric efficiency than gear pumps, and more complex structure than gear pumps.

3. Piston pump.

High volumetric efficiency, small leakage, can work under high pressure, mostly used in high-power hydraulic systems; However, the structure is complex, the material and processing accuracy are high, the most expensive, and the cleanliness of the oil is high.

Generally, piston pumps are used when gear pumps and vane pumps cannot meet the requirements. There are some other forms of hydraulic pumps, such as screw pumps, etc., but the application is not as good as the above three kinds of general lifting.

Piston pump is a type of reciprocating pump, which belongs to positive displacement pump. The rotational motion of the motor is transformed into the reciprocating motion of the plunger by means of an eccentric wheel and a crosshead slide mechanism.

When the plunger is pulled back, the volume of the closed cavity formed by the inlet check valve, the outlet check valve and the plunger increases, the pressure decreases, the outlet valve is closed, the inlet valve is opened, and the liquid enters the cavity; When the plunger is pushed forward, the volume of the closed cavity formed by the inlet check valve, the outlet check valve and the plunger decreases, the chamber pressure rises, the inlet valve closes, and when the pressure is higher than the outlet pipeline, the outlet valve opens and the liquid is discharged. In this way, as the plunger reciprocates, the liquid continues to enter the outlet pipe from the inlet pipe through the plunger pump.

The working principle of the piston pump is:Piston pump is a kind of reciprocating pump, which belongs to the volume pump, and its plunger is driven by the eccentric rotation of the pump shaft, reciprocating motion, and its suction and discharge valves are one-way valves.

When the plunger is pulled out, the pressure in the working chamber decreases, the outlet valve is closed, and when the pressure is lower than the inlet, the inlet valve opens and the liquid enters; When the plunger pushes inward, the chamber pressure rises and the inlet valve closes, and when the outlet pressure is higher than the outlet, the outlet valve opens and the liquid is discharged. When the transmission shaft drives the cylinder to rotate, the swash plate pulls or pushes the plunger back from the cylinder to complete the suction and discharge process.

The oil in the working chamber composed of plunger and cylinder bore communicates with the suction and discharge chambers of the pump respectively through the oil distribution pan. The variable mechanism is used to change the inclination angle of the swash plate, and the displacement of the pump can be changed by adjusting the inclination angle of the swash plate.