Three-roller integrated load roller pin optic elastohydrodynamic tester

Abstract

The invention relates to a three-roller integrated load roller pin optic elastohydrodynamic tester. The tester comprises a stand, a base supporting plate, a base, a cross beam supporting plate, a cross beam, an optical interference measurement system, a loading system and a transmission mechanism, wherein the stand is positioned at the bottom; the base supporting plate is connected to the stand through a screw; the base and the transverse beam supporting plate are mounted on the top end of the base supporting plate; the optical interference measuring system is fixed to the side edge of the base; the loading system is mounted on the cross beam; the transmission mechanism is connected and located on the stand through the screw. According to the tester, the elastohydrodynamic test of a needle roller thrust bearing can be simulated; the diameter of a test roller ranges from phi 4 to 6mm, and the reachable length of the roller is 10 to 25mm; the test can be performed under the maximum load of hertz contact stress of 1.5GPa, which his close to the actual working condition load condition; the constant-speed, accelerating and deceleration movement of a roller can be achieved; a roller elastohydrodynamic oil film under different specification, different roller convexity, different lubricating grease and different working loads can be tested.

Description

technical field [0001] The invention relates to a three-roller integrally loaded needle roller opto-elastohydrodynamic testing machine, in particular to a testing machine for measuring the thickness and shape of a needle-roller elastohydrodynamic lubricating oil film. Background technique [0002] Needle roller bearings are components that support rotating shafts and are widely used in various fields of the machinery industry. With the rapid development of modern industrial technology, high-speed, heavy-load and high-reliability requirements are put forward for line contact pairs. Modern elastohydrodynamic lubrication theory, which comprehensively considers factors such as surface topography effect, time-varying effect, thermal effect, and lubricant rheological properties, has basically matured, and is developing in a direction closer to actual working conditions. In order to truthfully explore the actual working conditions of mechanical parts in engineering, effectively re...

AI Technical Summary

Problems solved by technology

The constant changes in the working conditions of the needle roller lubrication surface will inevitably cause the dynamic effect of the oil film, and then the characteristics of the contact stress distribution and oil film shape of the oil film will be different. Some experimental studies have been done, but there are few experimental studies on the elastohydrodynamic characteristics of the finite-length line contact pair under the rotating motion of the needle roller with a large aspect ratio. Therefore, it is necessary to study the elasto-hydrodynamic characteristics of the finite-length line contact pair of the needle roller

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