Radial digital pump capable of adjusting pressure impact and control method thereof

Abstract

The invention discloses a radial digital pump capable of adjusting pressure impact and a control method of the radial digital pump. A control unit is designed for each plunger of the digital pump; the dynamic characteristics of the corresponding high-speed switch valve are adjusted according to the current movement speed of the plunger, so that when the plunger enters the oil discharge movement state and the movement speed is high, the dynamic characteristics of the high-speed switch valve are adjusted, opening and closing of the high-speed switch valve are slowed down, and pressure impact on a containing cavity caused by high-speed opening of the high-speed switch valve during high-speed movement of the plunger is reduced; when the plunger enters the oil suction motion state and the motion speed is low, the dynamic characteristics of the corresponding high-speed switch valve are adjusted, and the high-speed switch valve is opened and closed faster. The equivalent driving voltage of the high-speed switch valve can be changed by changing the duty ratio of the control voltage signal of each control unit, and the control is simple and effective. And the dynamic performance of the high-speed switch valve can be adjusted by adjusting the opening duty ratio and the closing duty ratio, the efficiency and the flow response characteristic of the digital pump can be greatly improved, and the oil suction and discharge time of the radial digital pump is shortened.

Description

technical field [0001] The invention relates to the field of radial digital pump control, in particular to a control method for adjusting the pressure shock of the radial digital pump. Background technique [0002] The hydraulic pump provides oil with a certain pressure for the actuators such as hydraulic motors or hydraulic cylinders in the hydraulic system to ensure that the actuators can work normally, and its performance often directly affects the characteristics and reliability of the entire hydraulic system. Due to its advantages of high working pressure, long service life, low noise and high control precision, radial piston pumps are favored by the hydraulic industry at home and abroad, and are widely used in hydraulic systems of metallurgy, mining, forging, ships and other mechanical equipment. Traditional radial plunger hydraulic pumps are mostly driven by cams and flow distribution by check valves. Although they have a simple structure and low cost, they also have ...

AI Technical Summary

Problems solved by technology

However, this control method cannot adjust the dynamic performance of high-speed switches

When the speed of the radial digital pump is high, the speed of the plunger inside the cavity is relatively high, and the high-speed switching valve will be subjected to strong pressure shock during rapid opening and closing, which will generate huge noise, and will also affect the plunger, high-speed switching valve and other parts. cause damage

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