How does a hydraulic pump work?

Hydraulic pumps. It relies on the change of sealing volume to achieve oil suction and oil pressure, so it can be called a positive displacement pump. Its working process is the process of oil suction and oil pressing.

To ensure the proper operation of the hydraulic pump, the following conditions must be met:

1. It should have a sealing working volume, and the sealing volume should be able to repeatedly change from small to large, and then from large to small;

2. There must be an oil distribution device, and the oil tank must be communicated with the atmosphere during the oil absorption process, and the oil must be pressed to the system when the volume is reduced.

Hydraulic pump is divided into: gear pump.

Piston pumps, vane pumps, worm pumps. You can take a look at their detailed working process.

Hydraulic pump is a kind of hydraulic component that provides pressurized liquid for hydraulic transmission, and it is a kind of pump. Its function is to convert the mechanical energy of power engines (such as electric motors and internal combustion engines) into the pressure energy of liquids. The diagram shows the working principle of a single piston pump.

The cam is driven by an electric motor to rotate. When the cam pushes the plunger upward, the sealing volume formed by the plunger and the cylinder body decreases, and the oil is squeezed out of the sealing volume and discharged to the required place through the check valve. When the cam rotates to the descending part of the curve, the spring forces the plunger downwards to form a certain vacuum, and the oil in the oil tank enters the sealing volume under the action of atmospheric pressure.

The cam makes the plunger constantly rise and fall, the sealing volume periodically decreases and increases, and the pump continuously sucks and discharges oil.

The basic principle of hydraulic pumps.

It is a hydraulic component that provides pressurized liquid for hydraulic transmission, and it is a kind of pump. Its function is to transfer the mechanical energy of power engines (such as electric motors and internal combustion engines, etc.).

Converted into liquid pressure energy.

Cam. Rotated by an electric motor. When the cam pushes the plunger upward, the seal volume formed by the plunger and the cylinder body decreases, and the oil is squeezed out of the seal volume through the check valve.

Queue to where needed.

When the cam rotates to the lower part of the curve, the spring forces the plunger downward, creating a vacuum.

The oil in the tank is at atmospheric pressure.

under the effect of entering the sealing volume. The cam makes the plunger constantly rise and fall, the sealing volume periodically decreases and increases, and the pump continuously sucks and discharges oil.

Hydraulic pumps can be divided into the following types according to their working principle:

1. Gear pump.

The size is small, the structure is simple, the cleanliness requirements for the oil are not strict, and it is cheaper; However, the pump shaft is subject to unbalanced force, serious wear and leakage.

When the gear rotates, in the A cavity, the volume gradually increases due to the disengagement of the gear teeth, forming a vacuum to absorb oil from the oil tank, and the oil filled in the tooth groove is brought to the B cavity with the rotation of the gear, and in the B cavity, due to the meshing of the gear teeth, the volume gradually decreases, and the hydraulic oil is put in.

The discharge uses the change of the closed volume formed by the tooth and the pump casing to complete the function of the pump.

2. Vane pump.

It is divided into double-acting vane pumps and single-acting vane pumps. This kind of pump has uniform flow, smooth operation, low noise, higher working pressure and volumetric efficiency than gear pumps, and more complex structure than gear pumps. When the rotor rotates, the blades are under centrifugal force.

and pressure oil, the tip is attached to the inner surface of the stator.

In this way, the working volume of the two blades and the inner surface of the rotor and stator is first absorbed from small to large, and then drained from large to small, and when the blades rotate for one week, two oil absorption and two oil discharge are completed, and the volume change between the blades inserted into the rotor groove is used to complete the role of the pump.

The working principle of a hydraulic pump.

Open circuit: The hydraulic pump sucks oil from the oil tank and pressurizes it, and the pressure oil drives the actuator to return the oil to the oil tank after the work is done. There are "open" units in the circuit — fuel tanks.

Closed circuit: The pressure oil output by the hydraulic pump directly enters the actuator, and the oil is returned to the low-pressure oil port of the hydraulic pump after the actuator is driven to work, forming a "closed" circuit. The open system is large in size, slightly less efficient, less costly, has a wide range of applications, short component lead times, and low maintenance requirements.

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The working principle of the hydraulic pump is: 1. The hydraulic pump is a hydraulic component that provides pressurized liquid for hydraulic transmission, and it is a kind of pump. Its function is to convert the mechanical energy of the power machine into the pressure energy of the liquid.

The output flow can be adjusted according to the needs of the variable pump, and the flow can not be adjusted is called the fixed pump. There are three types of pumps commonly used in hydraulic systems: gear pumps, vane pumps and piston pumps; 2. Gear pump: small size, simple structure, low requirements for oil cleanliness, cheaper; However, the pump shaft is subject to unbalanced force, serious wear and leakage. 3. Vane pump:

It is divided into double-acting vane pumps and single-acting vane pumps. This kind of pump has uniform flow, smooth operation, low noise, higher working pressure and volumetric efficiency than gear pumps, and more complex structure than gear pumps. 4. Piston pump: high volumetric efficiency, small leakage, can work under high pressure, mostly used in high-power hydraulic system; However, the structure is complex, the material and processing accuracy are high, the most expensive, and the cleanliness of the oil is high.