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Ultralow-temperature rolling bearing service life test device

A life test device, a technology of rolling bearings, applied in the direction of mechanical bearing testing, etc., can solve problems such as the inability to detect the friction loss of the test bearing and the inability to completely simulate the bearing.

Pending Publication Date: 2022-03-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings in the prior art that the actual working conditions of the bearing cannot be completely simulated and the friction loss during the test bearing operation cannot be detected, the present invention proposes an ultra-low temperature rolling bearing life test device

Method used

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  • Ultralow-temperature rolling bearing service life test device

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Embodiment Construction

[0051] An improved ultra-low temperature rolling bearing life test device includes a test section, an axial loading mechanism 1, a radial loading mechanism, a driving motor and a monitoring system. Among them, the test section, the axial loading mechanism 1, the drive motor and the detection system are all existing technologies; on the basis of the existing technology, a radial loading mechanism is added and key components are improved to realize the radial loading mechanism. Use effectively.

[0052] The test section includes a test cavity and a test shaft system. The test chamber consists of two parts, the low temperature chamber is located at the upper end of the oil-air lubrication chamber; there is a combined sealing structure 4 between the low-temperature chamber and the oil-air lubrication chamber. The low temperature cavity is a cavity surrounded by the low temperature cavity shell 2, the combined sealing structure 4 and the low temperature cavity sealing end cover 3;...

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Abstract

The invention discloses an ultralow-temperature rolling bearing service life testing device. A radial loading mechanism and a friction torque measuring assembly are additionally arranged on the ultralow-temperature rolling bearing service life testing device. In order to ensure that the radial loading mechanism is not influenced by an ultralow-temperature environment, the outer surface of the circumference of the radial loading mechanism is wrapped with a flexible corrugated pipe, and the radial loading mechanism is effectively isolated from the ultralow-temperature environment; meanwhile, in order to ensure that the friction torque measuring assembly is not influenced by an ultralow-temperature environment, the friction torque measuring assembly is arranged on a transmission path of a radial airborne mechanism and is measured through a torque balance method, and in order to ensure the authenticity and credibility of the friction torque, the loading mechanism and the friction torque measuring assembly adopt flexible mechanisms. The friction torque is arranged in the transmission path of the radial loading mechanism, so that the friction torque of the test bearing under different loads and rotating speeds can be measured, the same mechanism is used for measuring the friction torque and applying the radial load, the structure is simplified, and the space is saved.

Description

technical field [0001] The invention relates to the field of rolling bearing life tests, in particular to an ultra-low temperature rolling bearing life test method. Background technique [0002] With the sharp increase in human demand for heavy-duty launch vehicles, the requirements for the speed and load capacity of ultra-low temperature rolling bearings used in rocket engines are getting higher and higher, and the life and reliability indicators are becoming more and more stringent. These bearings serve in ultra-low temperature environments formed by liquid oxygen or liquid hydrogen. At the same time, it is subjected to high-speed and heavy-load conditions, and the friction torque generated during the operation of the bearing will cause energy loss, thereby affecting the bearing life, which is an important technical indicator of the bearing life. In view of the importance of simulating the ultra-low temperature environment and real working conditions of bearings for the li...

Claims

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Application Information

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IPC IPC(8): G01M13/04
CPCG01M13/04
Inventor 杨朝晖牛晓亮李崇赫杨宏章南凯刚
Owner NORTHWESTERN POLYTECHNICAL UNIV
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