High-speed high-temperature friction and wear test bed adopting symmetrical loading

Abstract

The invention provides a high-speed high-temperature friction and wear test bed adopting symmetrical loading, and belongs to the field of high-speed high-temperature friction and wear tests. The high-speed high-temperature friction and wear test bed comprises a base, a driving module, a test module, a heating module and a measurement monitoring module, wherein power and a high-temperature environment are provided for the test module through the driving module and the heating module respectively; a high-speed electric spindle of the driving module is fixed at one end of a bottom plate through aclamping mechanism, and an output shaft of the high-speed electric spindle is connected with the test module through a flexible coupling; the test module comprises a mechanical shaft, a bearing seatand loading devices; two ends of the mechanical shaft are supported and mounted at the other end of the bottom plate through the bearing and the bearing seat respectively; a test ring is coaxially mounted in the middle of the mechanical shaft through a modular test ring mounting seat and driven by the high-speed electric spindle to rotate synchronously; the two loading devices are symmetrical about the central axis of the mechanical shaft and fixed on the bottom plate; and the highest test rotating speed can reach 30,000 r / min, the highest linear speed of a contact point of the test ring and atest block can reach 400m / s, and the test is stable to complete the measurement function.

Description

Technical field[0001]The invention belongs to the field of high-speed and high-temperature friction and wear tests, and specifically relates to a high-speed and high-temperature friction and wear test bench adopting symmetrical loading.Background technique[0002]The sliding friction pairs of typical tribological components such as seals and bearings in aero-engines need to work at high speeds, high temperatures and other harsh working conditions that are approaching the limits of the current materials. The friction pairs such as seals often cause excessive surface contact stress and friction heat. Intensified and lubrication failure, resulting in increased wear and tear, resulting in seal failure. In order to meet the development trend of aero engines towards large thrust-to-weight ratio, high reliability and long life, the material characteristics and structure of seals and other parts need to be continuously improved. Therefore, carrying out research on tribological characteristics...

AI Technical Summary

Problems solved by technology

[0003] The currently used friction and wear test devices use the motor as the driving device, and the tester is connected by gears, belts and other transmission methods. The test speed is very limited and the safety of the motor cannot be guaranteed, and the loading method of the specimen is mostly vertical and unidirectional. Loading increases the radial force on the shaft. When a large loading force is used, the shaft speed cannot be guaranteed not to exceed the critical speed under the condition of high-speed rotation of the main shaft, and the life of the bearing is severely reduced due to excessive load, which restricts high speed and large loading force. Application in the test

In addition, due to the functional and size limitations of the testing machine as a whole, heating and heat preservation devices, the current testing device cannot realize the testing conditions above 500°C at the same time of high rotational speed and high line speed, which limits the choice of testing conditions and the exploration of high-temperature friction mechanism. Or the heater is fixedly installed, the test specimen cannot be disassembled flexibly and has no modular design

Most of the test pieces are ring-shaped test pieces and cylindrical or square test blocks, which are not conducive to replacement when they are supported on both sides. Due to the repeated reinstallation of bearings and bearing seats during replacement, the disassembly and assembly of multiple tests is more complicated and cannot be repeated. Installation accuracy

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