Rolling friction fatigue testing machine with adjustable sliding-rolling ratio

Abstract

The invention provides a rolling friction fatigue testing machine with an adjustable sliding-rolling ratio, which comprises a machine body, a machine body panel is arranged on the machine body, a main test piece and three accompanying test pieces are arranged on one side of the machine body panel, the accompanying test pieces are uniformly distributed in an equilateral triangle shape around the circumferential surface of the main test piece, and the main test piece is driven to rotate by a main test motor through a transmission shaft; the main test piece and the transmission shaft are in floating connection, a dynamic torque sensor is installed between the transmission shaft and the main test motor, the accompanying test piece is driven by the accompanying test motor to rotate synchronously through a synchronous belt, an accompanying test piece loading mechanism is arranged above the accompanying test piece, an axial limiting mechanism is arranged at the outer end of the main test piece, and lubricating oil cavities are formed around the main test piece and the accompanying test piece. And a vibration sensor is arranged on a panel of the machine body. The testing machine is compact in structure and reasonable in layout, friction performance tests of a test piece in different states such as rolling, sliding or rolling and sliding combination can be achieved by adjusting the rotating speed of the motor, and the testing efficiency is higher; load loading is automatically controlled in a closed loop mode, and the automation degree is high.

Description

technical field [0001] The invention belongs to the technical field of rolling bearing processing and testing equipment, and in particular relates to a rolling friction fatigue testing machine with adjustable slip-to-roll ratio. Background technique [0002] Tribology is a subject related to friction, wear and lubrication, involving physics, chemistry, material science, reliability engineering and other disciplines. It has a very wide range of applications and is very practical. In the study of tribology, both Analyzing the theoretical model requires a large number of experimental tests, and the combination of the two can solve practical problems. [0003] Friction is divided into sliding friction and rolling friction according to the mode of motion. Corresponding to sliding friction, rolling friction has a very low coefficient of friction and is therefore a very important means of reducing friction. When rolling motion is used to carry and transmit loads, it can achieve m...

AI Technical Summary

Problems solved by technology

The disadvantage is that two ring-shaped samples are used for the test. The test load is high, the stress of the sample is high, and the rotation speed is low. For two rings, one of the test pieces has only one contact point with the other accompanying test piece. Contact once, for the rolling and sliding friction fatigue test under medium and low load, the test period is too long, the test efficiency is very low, the equipment is bulky, and the energy consumption is high

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