A hydraulic valve reversing buffer device

Abstract

The invention discloses a hydraulic valve reversing buffer device, which belongs to the technical field of hydraulic valves. An anti-rotation screw plug is connected between the end cover and the valve stem; one end of the anti-rotation screw plug is provided with a guide section, and the other end of the anti-rotation screw plug is connected to the valve stem; a guide surface and a throttling groove are opened on the circumferential surface of the guide section; Two flow grooves are arranged axially along the guide section, and the two throttle grooves are symmetrically arranged; a partition plate is provided inside the end cover, and the partition plate divides the inside of the end cover into a front chamber and a rear chamber; the axis of the partition plate is provided with a guide The cross section of the guide hole is matched with the cross section of the guide section, and the guide section is slidably fitted in the guide hole. The present invention realizes the micro-motion operation of the valve stem in the positive and negative directions, improves the flow control accuracy and the operability of the actuator during the micro-motion; effectively reduces the flow and pressure generated when the valve stem returns to the neutral position in the positive and negative directions Fluctuation improves the safety performance and operating comfort of the main engine; effectively prevents the rotation of the valve stem, avoids the risk of the valve core sticking, and improves the safety of the actuator.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a reversing buffer device for hydraulic valves. Background technique [0002] The application environment of construction machinery is relatively harsh, the working conditions are complex, and there are many uncontrollable factors; during the working process of hydraulic valves, especially during the reversing process of the valve stem, sudden changes in the flow rate are prone to occur, and the actuators are accelerated or rushed due to sudden changes in the liquid flow. stop, resulting in the vibration of the actuator, causing a certain hidden danger to the safety of the main engine, the vibration of the main engine is not conducive to operation, control and poor operating comfort; High performance requirements, the stability of the valve core is conducive to the control of flow accuracy, and is convenient for the micro-operation of the actuator; in the process of the ...

AI Technical Summary

Problems solved by technology

[0005] 1. Neglecting the requirements of the micro-operation of the actuator on the control of the valve core flow accuracy, which is not conducive to the fine work of construction machinery;

[0006] 2. Neglecting the influence of valve stem rotation on the throttling area of ​​the valve stem, the flow through the valve stem changes when the valve stem rotates, resulting in uncoordinated actions of the actuator

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