High-speed testing machine of offset double-oscillating follower floating swash plate end cam oscillating bearing

Abstract

The invention discloses a high-speed testing machine of an offset double-oscillating follower floating swash plate end cam oscillating bearing. Double-swash-plate end cams are mounted at spline shaft sections in the middles of high-speed rotating shafts; one end of a high-frequency oscillating shaft I is fixedly connected with an inner ring of a testing oscillating bearing I; an outer ring of the testing oscillating bearing I is fixedly connected with a loading hydraulic cylinder I; and two groups of rolling bearings of a rolling bearing VII, a rolling bearing VIII, a rolling bearing IX and a rolling bearing X of C X-shaped oscillating shafts I and II mounted on an L-shaped fork frame of the high-frequency oscillating shaft I are tangent to swash plate end surfaces of the double-swash-plate end cams respectively. According to the invention, motions and loadings of the two high-speed rotating shafts are symmetrical, the double-swash-plate end cams and the rolling bearings contacted with the double-swash-plate end cams are in a tangent state all the time and are in rolling friction, so that the abrasion is slight, and the noise is low; and the oscillating frequency can reach 70-80 Hz, so that the requirement of a fatigue test of a high-frequency oscillating aviation oscillating bearing can be met.

Description

technical field [0001] The invention relates to a high-speed testing machine for a floating swash plate end face cam joint bearing of an offset double swing follower. 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 fat...

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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