Ultra-low-temperature friction and wear vacuum testing machine

Abstract

The invention discloses an ultra-low-temperature friction and wear vacuum testing machine. The ultra-low-temperature friction and wear vacuum testing machine comprises a vacuum box; the upper inner surface and lower inner surface of the vacuum box are respectively provided with a base and a bracket; a rotating disc is connected into the base; the upper end of the rotating disc is connected with avariable frequency motor; an eccentric pin is fixed to the lower part of the rotating disc; a sample disc is disposed under the eccentric pin in a manner that the sample disc can contact with the eccentric pin; the sample disc is fixed on a worktable; a liquid nitrogen flowing pipeline is arranged in the worktable; the lower part of the worktable is connected with a three-dimensional force sensor,a guide rod, a lead screw and a stepping motor sequentially; the three-dimensional force sensor is connected with a data acquisition and processing system; the guide rod and the bracket are connectedwith each other through clearance fit; the relative slide of the eccentric pin and the sample disk is achieved; and the stepping motor applies a load to the sample disc. The ultra-low-temperature friction and wear vacuum testing machine of the invention has the advantages of simple structure and reliable operation. With the ultra-low-temperature friction and wear vacuum testing machine adopted, the relationship of the change of pressure, friction forces and friction coefficients with time under vacuum ultra-low temperature conditions can be obtained, and data are accurate, and high repeatability can be realized.

Description

technical field [0001] The invention relates to an experimental device, in particular to an experiment and detection device for friction grinding under vacuum ultra-low temperature conditions. Background technique [0002] Friction and wear is a common form of material failure. Vacuum ultra-low temperature tribology research is an important tribological problem. To conduct vacuum ultra-low temperature tribology research, a reliable vacuum ultra-low temperature friction and wear testing machine must be available. However, due to vacuum ultra-low temperature friction and wear experiments The machine involves difficulties in achieving and maintaining a vacuum ultra-low temperature environment, rotating sealing, data acquisition and processing, etc. At present, there is no experimental equipment specially used for vacuum ultra-low temperature friction and wear. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior ...

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Problems solved by technology

[0002] Friction and wear is a common form of material failure. Vacuum ultra-low temperature tribology research is an important tribological problem. To conduct vacuum ultra-low temperature tribology research, a reliable vacuum ultra-low temperature friction and wear testing machine must be available. However, due to vacuum ultra-low temperature friction and wear experiments The machine involves difficulties in achieving and maintaining vacuum ultra-low temperature environment, rotary sealing, data acquisition and processing, etc. At present, there is no experimental equipment specially used for vacuum ultra-low temperature friction and wear.

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