High-speed testing machine for dual cylindrical cam joint bearings with four oscillating followers

Abstract

The invention discloses a centering four-oscillating-follower double-cylindrical-cam knuckle bearing high-speed testing machine. Two cylindrical cams (I and II) are fixedly connected onto a high-speed rotating shaft, one end of each of high-frequency oscillating shafts (I, II, II and IV) is fixedly connected with an L-shaped fork-shaped oscillating rod, and outer spherical face abrasion-resistant sleeves installed on rolling bearings of the L-shaped fork-shaped oscillating rods are tangent with four inner end inclined faces of the two cylindrical cams (I and II). The other end of each high-frequency oscillating shaft is fixedly connected with an inner ring of a corresponding test knuckle bearing, and an outer ring of each test knuckle bearing is fixedly connected with a loading hydraulic cylinder. The high-speed rotating shaft and the cylindrical cams (I and II) are of a balance structure, the cylindrical cams (I and II) and the outer spherical face abrasion-resistant sleeves in contact with the cams are in rolling friction, friction is small, abrasion is small, and working efficiency is high. Meanwhile, the machine can be used for conducting fatigue tests on different knuckle bearings. The oscillating frequency can reach 70-80Hz, and the requirements of fatigue tests of high-frequency oscillating aviation knuckle bearings can be met.

Description

technical field [0001] The invention relates to a high-speed testing machine for a double-cylindrical cam joint bearing of a centering four-oscillating 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 fatigue ...

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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