High-speed testing machine for joint bearings with single swing follower and double disc cam

Abstract

The invention discloses a single-oscillating-follower double-disc-shaped cam knuckle bearing high-speed tester. Transmission gears I, II and III are fixedly connected with middle portions of high-speed rotating shafts I and II and an intermediate transmission shaft respectively, working cams I and II and balancing cams I and II are fixedly installed at one ends of the high-speed rotating shafts I and II respectively, and the other end of one of the high-speed rotating shafts I and II is connected with an electric motor through a coupling. An outer ring of a tested knuckle bearing is fixedly connected with a loading hydraulic cylinder. A rolling bearing IX is installed on a transverse short shaft on the lower portion of an L-shaped swing rod which is fixedly connected with one end of a high-frequency swing shaft. According to the high-speed tester, the high-speed rotating shafts and the working cams and the balancing cams which are fixedly installed on the high-speed rotating shafts are in a quasi-and-dynamic-balance structure, so that the high-speed tester has the advantages of being small in friction force, light in abrasion, small in shock, low in noise and the like. The swing frequency of the high-speed tester can be up to 70-80Hz, so that the requirements of fatigue tests for high-frequency swing aviation knuckle bearings.

Description

technical field [0001] The invention relates to a high-speed testing machine for joint bearings with single swing follower and double disc cams. Background technique [0002] Spherical joint bearing is a kind of sliding bearing with special structure, which is mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface. Joint bearings are widely used in the connection of swing components of aviation vehicles because of their flexible rotation, maintenance-free, compact structure, easy assembly and disassembly, large load-carrying capacity, and long life. [0003] During the flight of an aircraft, the failure of any component will cause catastrophic consequences. Therefore, it is a very serious and important work to determine the service life of the components of the aircraft. In order to accurately determine the service life of the components of the aircraft, the usual practice is to carry out fatigue tests on the comp...

AI Technical Summary

Problems solved by technology

The oscillating frequency of joint bearings on some aviation vehicles is very high (30-70 Hz), while the joint bearing fatigue testing machines currently used in my country mostly use crank slider mechanisms, because it is difficult for this mechanism to achieve dynamic balance of moving components, so its highest oscillating frequency Generally, it does not exceed 20Hz, which cannot meet the fatigue test requirements of high-frequency oscillating aviation joint bearings, which seriously restricts the development of domestic high-frequency oscillating aviation joint bearings.

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