Seal performance test device of airplane landing gear buffer

Abstract

The sealing performance test device of the aircraft landing gear buffer comprises a servo cylinder mounted on the test stand, a piston rod for reciprocating motion under the hydraulic drive, a test cylinder, a actuator and a detection mechanism; one end of the piston rod passes through the servo cylinder; a cylindrical boss is arranged in the middle of the piston rod located in the servo cylinder. The cylindrical boss divides the inner cavity of the servo cylinder into a left cavity and a right cavity, and the ends of the left cavity and the right cavity are respectively provided with a first drive oil source inlet and a second drive oil source inlet; one end of the piston rod is connected with the actuator through a spherical joint; the first groove of the inner cylinder surface of the test cylinder is provided with a first groove, and the first groove is provided with actuator; there is a gap between the first groove and the outer wall of the actuator; the gap between the first groove and the outer wall of the actuator forms a hydraulic oil chamber; each side of the hydraulic oil chamber is provided with a hydraulic oil inlet and a circulating oil return port respectively; one end of actuator that is far away from the piston is connected to the detection mechanism, and a displacement sensor is installed at the end of the detection mechanism.

Description

technical field [0001] The invention relates to a sealing performance test device for an aircraft landing gear buffer, and belongs to the technical field of design and development of high-performance seals and sealing performance test devices. 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 element to press to...

AI Technical Summary

Problems solved by technology

However, it is very difficult to accurately obtain the performance parameters of hydraulic reciprocating seals in theory, and it is also difficult to evaluate the product quality comprehensively and reasonably in production practice, and only some extremely limited certainty can be obtained from the use process. indirect result of

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