Anti-reversal valve for excavator rotary motor

Abstract

The invention discloses an anti-reversal valve for an excavator rotary motor. The anti-reversal valve for the excavator rotary motor is characterized by comprising a valve body, a valve sleeve is arranged in the valve body, one end of the valve sleeve is connected with step surfaces inside the valve body, the other end of the valve sleeve is connected with a screw plug, the screw plug is connected with the valve body through a screw thread, a third O-shaped ring and a check ring are arranged between the screw plug and the valve body to perform sealing, a first valve element is disposed in an inner cavity of the valve sleeve, a second spring is mounted between the first valve element and steps inside the valve sleeve, a third valve element is disposed in an inner cavity of the first valve element, the other end of the third valve element is connected with the screw plug, a first O-shaped ring is disposed between the third valve element and the first valve element to perform sealing, the other end of the first valve element is connected with a second valve element, a steel ball is mounted between the first valve element and the second valve element, a first spring is disposed at the other end of the second valve element, and an end face of the valve sleeve, which is connected with the screw plug, is provided with a second O-shaped ring. The anti-reversal valve for the excavator rotary motor has the advantages that the structure is simple and reasonable, performances are stable, opening and closing performances are good, manufacturing costs are low, and the like.

Description

Technical field [0001] The invention relates to a hydraulic component, in particular to an anti-reverse valve for a swing motor of an excavator. Background technique [0002] Excavators play a very important role in engineering construction. With the development of society, people have higher and higher requirements for the performance, safety, and operating comfort of excavators. Therefore, the entire machine and parts of excavators are Design and manufacturing requirements are getting higher and higher. During the excavation operation of the excavator, when the slewing motor of the excavator stops working, due to the existence of inertia, a high-pressure shock will be generated at the oil outlet of the motor, which will cause the reversal of the motor and affect the stability of the excavator. Therefore, it is necessary to provide a device that can eliminate the reversal caused by the parking brake of the motor and ensure the smooth operation of the swing motor and the entire ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an anti-reversal valve for excavator rotary motor with simple and reasonable structure, stable performance, good opening and closing performance, low manufacturing cost, and can eliminate the reverse rotation caused by motor parking brake, so as to solve the problem of excavation. The problem of braking shock generated by the engine during parking braking

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