Buffer relief valve for hydraulic motor

Abstract

The invention discloses a buffer relief valve for a hydraulic motor, which comprises a valve body, a valve seat, a valve sleeve and a screw plug which are matched mutually, wherein the valve sleeve is provided with a valve plug assembly; a buffer piston is sleeved in a sliding cavity position on the valve body on the outer peripheral surface of the valve sleeve in a sliding manner and is provided with a buffer cavity with the screw plug formed at the left end opening of the valve body; the buffer cavity is communicated with an oil inlet of the valve body by a radial damping hole formed by the valve sleeve and an axial hole of the valve plug assembly; and the buffer piston realizes the buffer function of the relief valve by differential pressure delay caused by right shift. The relief valve is compact in a structure and easy to manufacture, and can improve the hydraulic impact of the hydraulic rotation motor during starting and braking and the operability of the hydraulic rotation motor obviously so as to improve prolong the service life of system hydraulic elements.

Description

technical field [0001] The invention relates to the technical field of mechanical and hydraulic control, in particular to an overflow valve, in particular to a buffer overflow valve for a hydraulic motor. Background technique [0002] In the construction machinery system, when there are many slewing mechanisms in motion, due to the large moment of inertia of the upper vehicle, it will cause a large hydraulic shock when starting, braking or suddenly changing direction. Especially when encountering an obstacle and suddenly stopping during the turning process, the hydraulic shock is more obvious. Hydraulic shock can cause vibration and noise to the entire hydraulic system and components, and even damage. In the prior art, people generally use the swing motor relief valve to limit the maximum working pressure of the swing system, but it is difficult for ordinary relief valves to completely eliminate or absorb the hydraulic shock when the system starts or brakes, so it cannot fu...

AI Technical Summary

Problems solved by technology

Hydraulic shock will cause vibration and noise to the entire hydraulic system and components, and even damage

In the prior art, people generally use the swing motor relief valve to limit the maximum working pressure of the swing system, but it is difficult for ordinary relief valves to completely eliminate or absorb the hydraulic shock when the system starts or brakes, so it cannot further improve the system performance. operational performance, no better protection of the service life of the hydraulic components

Images