Device and method for testing thickness of lubricating oil film of rolling bearing

Abstract

The invention discloses a device and method for testing the thickness of a lubricating oil film of a rolling bearing. The device comprises a high speed motorized spindle and a low speed motorized spindle which are arranged opposite to each other in the radial direction of a support, the front end of the high speed motorized spindle is connected with a rolling element, the front end of the low speed motorized spindle is connected with a ring body of the bearing to be tested, and the rolling element applies radial loads to the ring body of the bearing to be tested through a loading mechanism; the high speed motorized spindle and the lower speed motorized spindle are respectively provided with a speed measurement sensor which is connected with a data acquiring and processing system through a frequency converter; a lubricating device is arranged beside the position of contact between the ring body of the bearing to be tested and the rolling element to change the lubricating status; an ultrasonic sensor is attached to the inner surface of the ring body of the bearing to be tested and connected with a sliding ring by a signal line through a clamp and a hole formed in a pull rod, signals are transmitted to the ultrasonic data acquiring and processing system, and real-time film thickness values of a test point in the contact position of the rolling bearing can be acquired under the action of slip frequency factors with the ultrasonic film thickness measurement technology.

Description

technical field [0001] The invention belongs to rolling bearing test technology, in particular to an oil film thickness testing device and method for a rolling bearing slip test bench. Background technique [0002] Rolling bearings are an important mechanical basic part that is widely used. The development of modern industry has put forward higher requirements for the working performance of rolling bearings, and bearings with high speed and long life are more and more favored by users. However, the slipping and scratching of light-loaded bearings under high-speed conditions have always been the key factors affecting the service life of bearings. Therefore, it is particularly important to study the mechanism of sliding failure of rolling bearings. The applicant has developed a simple and feasible rolling bearing slip test bench, which can be used to analyze the deep-seated mechanism of rolling bearing slip failure under the action of various parameters, and then optimize th...

AI Technical Summary

Problems solved by technology

In the research process of rolling bearing slipping failure, it is found that the thickness distribution and performance of the bearing lubricating film is a key performance index reflecting the lubrication state of the bearing, especially whether it is cracked or not is very important to reveal the essential mechanism of rolling bearing slipping failure, but at present There is a lack of effective technical support for the accurate acquisition of the extremely thin oil film thickness of the rolling bearing lubricating film

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