Pilot-operated electrical feedback proportional direction valve

Abstract

The invention relates to a pilot-operated electrical feedback proportional direction valve comprising a pilot-operated level and a main level, wherein a decompression base plate is arranged between the pilot-operated level and the main level; the pilot-operated level comprises a stroke control type proportional direction valve, a proportional electromagnet A and a proportional electromagnet B; the lower part of the pilot-operated valve body is provided with a plurality of hydraulic fluid ports; the pilot-operated valve core is communicated with each hydraulic fluid port through an oil duct; each hydraulic fluid port is communicated with the oil duct of the main level; the main level comprises a main valve body, a main valve core, a main valve core centering spring, a main valve end cover A and a main valve end cover B, wherein the lower part of the main valve body is provided with a hydraulic pressure fluid port P, an oil inlet and outlet A, an oil inlet and outlet B, a return opening T, a control hydraulic fluid port X and an oil drain port Y; the main valve body leads to the hydraulic fluid port via the oil duct; a pin fixed on the main valve end cover B is arranged in a chute; and the end part of the main valve core provided with the chute is fixedly connected with a position sensor. The invention has the advantages of high sensitivity, high dynamic quality and high reliability.

Description

technical field [0001] The invention relates to a valve, in particular to a pilot type electric feedback proportional directional valve. Background technique [0002] Ordinary valves can only function as reversing valves, and the median coverage of the valve port is affected by the dead zone. The pressure gain and flow gain of the valve are not high, and the sensitivity of the valve is not high. Since there is no amplifier connected, it can only be an open loop control, the steady-state and dynamic performance of the valve is poor. Contents of the invention [0003] The purpose of the present invention is to provide a pilot type electric feedback proportional directional valve with high sensitivity, high dynamic quality and high reliability. [0004] The technical scheme adopted in the present invention is: [0005] Pilot-operated electric feedback proportional directional valve, including a pilot stage and a main stage, a decompression pad is provided between the pilot ...

AI Technical Summary

Problems solved by technology

[0002] Ordinary valves can only function as reversing valves, and the median coverage of the valve port is affected by the dead zone. The pressure gain and flow gain of the valve are not high, and the sensitivity of the valve is not high. Since there is no amplifier connected, it can only be an open loop control, poor steady-state and dynamic performance of the valve

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