Sealing device between two objects of performing relative reciprocating motion

Abstract

The invention provides a sealing device between two objects of performing relative reciprocating motion, wherein one object is stationary, and the other object is moving; a gap I is formed between the two objects; the stationary object is provided with a sealing groove; the sealing device is arranged in the sealing groove; the sealing device comprises a sealing ring and a check ring; the cross section of the sealing ring is circular; the cross section of the check ring is square; the sealing ring and the check ring are both arranged in the sealing groove, and both sleeve on the moving object; the two objects compress the sealing ring; the cross section diameter of the sealing ring is less than the width of the sealing groove; the check ring is arranged at one side, which is opposite to the stress side of the stationary object, of the sealing ring; a gap II is formed between the check ring and the moving object. The sealing device between two objects of performing relative reciprocating motion, provided by the invention, is simple in structure; regardless of the fact that one side or two sides of the sealing device is / are stressed, the sealing ring can be enabled not to be early damaged, and the reciprocating motion of the moving object is not hindered.

Description

technical field [0001] The invention relates to a sealing device between two objects which perform relative reciprocating motion, and belongs to the technical field of machinery. Background technique [0002] In the hydraulic system, the seal between two objects that reciprocate each other, especially the seal between the piston and the inner wall of the liquid oxygen cylinder, is the most important and effective part to solve the leakage problem of the hydraulic system. If the seal of the hydraulic system is not good, there may be unacceptable The leaked oil will pollute the environment and may cause air to enter the oil suction chamber, affecting the working performance of the liquid oxygen pump and the stability of the hydraulic actuator movement. When the leakage is serious, the volumetric efficiency of the system is too low, and even the working pressure reaches Less than the required value; if the seal is transitional, although leakage can be prevented, it will cau...

AI Technical Summary

Problems solved by technology

In the prior art, generally only sealing rings are used as the sealing device between two objects that do relative reciprocating motion. The material of the sealing rings is generally rubber. The physical characteristics of rubber are flexibility and better oil resistance. However, due to its sealing The two objects are stationary on the outside and moving on the inside, so it often happens that the sealing ring enters the gap between the two objects. Once the sealing ring receives the reciprocating friction and extrusion between the moving object and the stationary object, the sealing ring will become invalid in a short period of time. , and then oil leakage occurs, and severe wear of the seal will also occur

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