Vertical double-swing-shaft four-disc-cam four-oscillating-bar knuckle bearing high-speed testing machine

Abstract

The invention discloses a vertical double-swing-shaft four-disc-cam four-oscillating-bar knuckle bearing high-speed testing machine. The end portions of high-speed rotation shafts I and II are fixedly connected with transmission gears I and II respectively, the high-speed rotation shafts I and II are fixedly provided with working cams I and III, balance cams I and III, working cams II and IV and balance cams II and IV respectively, one end of a high-frequency swing shaft I and one end of a high-frequency swing shaft II are fixedly connected with inner rings of testing knuckle bearings I and II, the other end of the high-frequency swing shaft I and the other end of the high-frequency swing shaft II are fixedly connected with two pairs of swing rods I, II, III and IV, and outer spherical surface abrasion-resisting sleeves I, II, III and IV on bearings of the two pairs of swing rods I, II, III and IV are tangent with the working cams I, II, III and IV. The high-speed rotation shafts, the working cams and the balance cams fixedly connected onto the high-speed rotation shafts form a dynamic balance structure, the working cams and the outer spherical surface abrasion-resisting sleeves in contact with the working cams form rolling friction, and the vertical double-swing-shaft four-disc-cam four-oscillating-bar knuckle bearing high-speed testing machine is small in friction force, low in abrasion degree and low in noise. The swing frequency of the machine can reach to 70-80 Hz and can meet the requirement for a high-frequency swing aviation knuckle bearing fatigue test.

Description

technical field [0001] The invention relates to a high-speed testing machine for joint bearings with vertical double pendulum shafts, four disc cams and four pendulum rods. 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...

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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