A Low Flow Switch Control Actuator

Abstract

The invention discloses a low-flow opening and closing control driver. The low-flow opening and closing control driver comprises a valve driving system and a main valve (1), wherein the input end of the valve driving system is connected with an oil supply circuit, and the output end of the valve driving system is connected with a rod-free cavity end port A of a bearing hydraulic cylinder; the input end of the main valve (1) is connected with the rod-free cavity end port A of the bearing hydraulic cylinder, and the output end of the main valve (1) is connected with the an oil return circuit; and the oil supply circuit is connected with a rod cavity B of the bearing hydraulic cylinder at the same time. According to the low-flow opening and closing control driver, a differential circuit is formed trough driving of two valves, so that the oil supply flow of a pump can be reduced; meanwhile, an oscillation circuit is formed by utilizing a fluid volume element and a fluid sense element, and micro-amplitude pressure waves existing in the oil supply circuit are converted into flow waves which meet requirements in amplitude and then are output, so that flow passing through the main valve is reduced to zero, the main valve is closed, and consequently, consumption of turning and closing of the main valve can be reduced; and the low-flow opening and closing control driver is a valve control driver which is low in oil supply quantity and low in valve consumption and has no hydraulic impact.

Description

technical field [0001] The invention relates to a driver, in particular to a low flow switch control driver. Background technique [0002] In the hydraulic system, hydraulic shock and vibration noise are one of the common faults, which seriously affect the control accuracy and reliability of the hydraulic system, increase the energy consumption of the system, and even bring potential failures to the system. The main causes of hydraulic shock are the pump station, hydraulic valve and pipeline structure, and the hydraulic valve is the second biggest culprit after the pump station. In the process of hydraulic valve control, changing the state of the valve port or switching the control state will cause a sharp change in the velocity of the liquid flow, turning the kinetic energy of the fluid into pressure energy, resulting in a sharp change in pressure. The process of sharp alternating ups and downs of pressure caused by hydraulic shock is a kind of unsteady flow. In the dynami...

AI Technical Summary

Problems solved by technology

This type of design can effectively solve the pressure pulse in some switching control systems and low-speed digital hydraulic systems, but due to the limited response speed and pressure compensation capability of the check valve, zero-flow switching control chamber and throttle chamber, in When the pressure shock is too large or the pulsation frequency is too high, this design can only reduce the hydraulic shock but cannot effectively remove the hydraulic shock

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