On-line test device for dynamic friction performance of paired angular contact ball bearings

Abstract

The invention relates to an on-line test device for dynamic friction performance of paired angular contact ball bearings. It uses the principle of air suspension and combines precision displacement measurement and adjustment technology. Bearing II is loaded in a non-contact axial direction, and the friction torque measuring device proposed by our research group in the patent "A High-speed Miniature Bearing Dynamic Friction Torque Measuring Instrument" (application number: 201610639490.9) measures the friction torque of the tested bearing II, thereby realizing Synchronous online measurement of friction torque, vibration, temperature and wear of a single precision bearing. The outer ring of the accompanying test bearing I of this device is fixed on the base, which not only can limit the rightward movement of the shaft system, but also can be used together with the radial axial air bearing and the non-working surface of the thrust plate when the shaft system is not working statically. To undertake the moment balance of the shaft system through careful counterweighting, so as to protect the non-working surface of the high-precision radial and axial air bearings from long-term contact damage.

Description

technical field [0001] The invention relates to an online test device for dynamic friction performance of paired angular contact ball bearings, which is a simultaneous online test device for simulating friction torque, vibration, temperature and wear of angular contact ball bearings under actual working conditions. Background technique [0002] Angular contact ball bearings are generally used in very precise and light-loaded occasions, such as the gyroscope of satellite inertial instruments, which determines that the failure mode is not fatigue failure, but the excessive fluctuation of the friction torque of the bearing affects the stability of the bearing or due to Excessive wear leads to reduced bearing accuracy and premature failure. These two failure modes are caused by the degradation of the lubricant and the wear between the ball and the inner and outer rings of the raceway after the bearing has been in operation for a long time, and the specific failure cannot be pred...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the difficulty of centering and locking the sleeve of the matching bearing outer ring in the locking part of the original patent, and to use the free and centering locking of the sleeve to measure the real-time dynamic friction torque and vibration of the bearing respectively. It is easy to interfere with the normal operation of the bearing, it is inconvenient to adjust the axial preload of the bearing under test, and it is impossible to measure the friction torque of a single bearing. Without any adjustments to the testing machine, the dynamic friction torque, vibration and temperature of a single bearing can be measured simultaneously, and the dynamic wear of the bearing can also be measured online for a long time

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