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Hydraulic oil pump working principle and internal structure analysis
Release time:
2023-12-08 14:44
Constant pressure variable pump is composed of piston pump, variable cylinder and regulator.
Working principle of hydraulic oil pump
The constant pressure variable pump is composed of a plunger pump, a variable cylinder and a pressure regulator.
Before the constant pressure pump reaches the set pressure of the regulator valve on the pump, the variable pump swash plate is at the maximum deflection Angle, and the pump displacement is maximum and constant. In fact, the constant pressure variable pump is quite a quantitative pump at this stage.
After reaching the set pressure of the regulator, the control oil enters the variable cylinder, and the variable cylinder pushes the swash plate to reduce the pump displacement.
In the constant pressure variable pump system, if there is an relief valve, the set pressure of the pressure regulator on the pump is less than the set pressure of the system relief valve 0.5-1Mpa. Otherwise, the pump pressure cannot reach the setting value of the pressure regulator, and it cannot be variable.
Advantages of constant pressure variable piston pump
1, high parameters: high rated pressure, high speed, pump driving power.
2, high efficiency, volume efficiency is about 95%, the total efficiency is about 90%.
3, long life.
4. Convenient variables and many forms.
5, light weight per unit power
6, the main parts of the plunger pump are under pressure stress, the strength of the material can be fully utilized
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