Performance test system for high-performance combined sealing ring of reciprocating machinery

Abstract

The invention relates to a performance testing system of high-performance combined seal rings of a reciprocating machine. The performance testing system comprises a reciprocating power system and a seal cavity hydraulic system, wherein the reciprocating power system comprises a piston rod, a servo cylinder and a piston; the seal cavity hydraulic system comprises an actuator cylinder, a testing cylinder, the combined seal rings, a displacement sensor and a spherical joint; one end of the piston rod horizontally penetrates through the servo cylinder; an inner cavity of the servo cylinder is divided into a left cavity body and a right cavity body by the piston; the other end of the piston rod is connected with the actuator cylinder via the spherical joint; the actuator cylinder horizontally penetrates through the testing cylinder; a groove is formed in the middle of an internal cylinder surface of the testing cylinder; a seal cavity is formed between the groove and an outer wall of the testing cylinder; the seal cavity can simulate fluctuation of oil pressure in an undercarriage buffer when an aircraft lands; two seal ring mounting grooves are formed in the two ends of the internal cylinder surface of the testing cylinder correspondingly; the combined seal rings are mounted in the two seal ring mounting grooves; one end, far away from the piston rod, of the actuator cylinder is connected with the displacement sensor; and the displacement sensor is used for measuring a reciprocating motion distance.

Description

technical field [0001] The invention relates to a performance testing system for a high-performance combined sealing ring of a reciprocating machine, belonging to the technical field of performance testing of a combined sealing ring of reciprocating components. Background technique [0002] The buffer is a key part of the landing gear, and the design of its sealing device plays an important role in the performance of the buffer and the safety and attendance of the aircraft. Therefore, when designing the buffers of modern aircraft, especially the landing gear of civil aircraft, wear resistance, long life and reliable sealing performance in the intended use environment are taken as the main design goals of the seal. The leakage problem in the research is one of the cores of the research. The buffer seal is an axial end face sealing device that relies on the elastic element to preload the end faces of the moving ring and the static ring or the medium pressure and the elastic e...

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Problems solved by technology

[0003] In order to solve the above-mentioned defects in the existing hydraulic reciprocating motion performance testing methods, the present invention provides a method that utilizes two subsystems (reciprocating power system and sealed cavity hydraulic system) to achieve different reciprocating motion speeds and different oil pressure levels for different The high-performance combined sealing ring performance test system of reciprocating machinery for the measurement of the leakage (rate) and friction of the combined sealing ring, the simulation parameters of the present invention can reach the level of each parameter in the buffer when the aircraft landing gear normally lands, but does not include accidents Working conditions and other abnormal working conditions

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