Ultralow-temperature vacuum sealing structure and full-ceramic rolling bearing performance testing device

Abstract

The invention discloses an ultralow-temperature vacuum sealing structure and a full-ceramic rolling bearing performance testing device, and belongs to the technical field of bearing testing devices. The ultralow-temperature vacuum sealing structure comprises a fixed support, a main shaft mechanism, an ultralow-temperature vacuum sealing chamber and a stress application assembly. The main shaft mechanism comprises a sample main shaft and a driving main shaft; the ultralow-temperature vacuum sealing chamber comprises a vacuum sealing cavity and an axial loading plug, and the sample main shaft isarranged in the vacuum sealing cavity; and the full-ceramic rolling bearing performance testing device comprises an ultralow-temperature vacuum sealing structure, a two-stage vacuum system, a self-pressurization liquid nitrogen tank, a signal acquisition system, a heating pipe, a motor, a controller and an upper computer. The ultralow-temperature vacuum sealing structure and the all-ceramic rolling bearing performance testing device can realize dynamic testing of the friction performance and the vibration performance of the all-ceramic rolling bearing in an ultralow-temperature vacuum environment and under the conditions of different temperatures, vacuum degrees, loads and rotating speeds, and are convenient to operate and high in accuracy.

Description

technical field [0001] The invention relates to the technical field of bearing testing devices, in particular to an ultra-low temperature vacuum sealing structure and an all-ceramic rolling bearing performance testing device. Background technique [0002] In recent years, all-ceramic rolling bearings have been more and more used in equipment in extreme environments such as aerospace and deep sea. All-ceramic rolling bearings can meet the requirements of ultra-low temperature and vacuum environments, but it is necessary to check the specific performance parameters of all-ceramic rolling bearings before using them. Tests to ensure the safety and reliability of full ceramic rolling bearings used in extreme environments. [0003] The existing bearing testing devices under low temperature and vacuum environments mostly use fully enclosed test devices. All components of the bearing test must meet the normal working requirements under vacuum and ultra-low temperature conditions at ...

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Problems solved by technology

[0003] Existing bearing test devices under low temperature and vacuum environments mostly use fully enclosed test devices, and all components of the bearing test must meet the normal working requirements under vacuum and ultra-low temperature conditions , the cost of the experiment is high, and higher requirements are put forward for the sealing and vacuum degree of the whole test device, which leads to the ultra-low temperature of all ceramic rolling bearings, low efficiency of vacuum test, complex operation and low accuracy

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