A variable load rolling friction and wear testing machine

Abstract

The invention discloses a variable-load rolling friction-abrasion testing machine, belongs to mechanical friction-abrasion testing devices, and relates to the variable-load rolling friction-abrasion testing machine which is controlled by double motors and is capable of changing the load size in real time, controlling the roll-slide ratio and controlling the temperature. In a driving mode of simultaneously driving a transmission assembly through the double motors, the testing machine consists of a rack, the left motor, the right motor, the transmission assembly, a lubricating temperature control assembly, a variable-load loading assembly and a torque detection assembly. In the variable-load loading assembly, a pneumatic generation device is connected with a pressure control valve through a pipe, the pressure control valve is connected with a pneumatic cylinder through a pipe, the pneumatic cylinder is arranged on a motor base plate through a bolt in a vertical direction, and a piston rod is arranged above the pneumatic cylinder and is capable of being finely adjusted up and down. The variable-load rolling friction-abrasion testing machine is simple in structure, accurate in measurement and complete in functionality; parameters such as slippage rate, lubrication, temperature and load can be controlled simultaneously.

Description

technical field [0001] The invention belongs to a mechanical friction and wear test device, and relates to a variable load rolling friction and wear test machine controlled by double motors, which can change the load size in real time, control the rolling-slip ratio and control the temperature of the rolling friction and wear test machine. Background technique [0002] During the working process of gears and bearings, there are both rolling and sliding between the tooth surfaces and between the ball and the raceway, so the friction between them also includes rolling friction and sliding friction. When studying the mechanism of the tooth surface failure form, the contact motion of the tooth surface can also be regarded as the contact between the arc surfaces in essence. Therefore, as long as the contact pressure, temperature, lubrication, surface characteristics and The sliding-rolling ratio can be used to simulate the meshing between the tooth surfaces by using the sliding-r...

AI Technical Summary

Problems solved by technology

For example, in the published patent application number CN200720039048.9, the patent name is: a rolling friction and wear testing machine patent document, which consists of three different orientation stepper motors, torque sensors, two-dimensional mobile platform, measuring Force sensor, rolling load module and computer control module; one motor drives the active friction ring sample, and the other two motors control the front and rear and left and right movements of the passive friction ring sample respectively, and the motor drives the movement of the platform and the force sensor To apply the load, the size of the load is determined by the load cell. This kind of friction machine has a simple structure, accurate measurement, and can realize continuous controllable slip rate and traction load; but the original design intention of this type of testing machine is not for gears. As well as experiments with large normal forces such as bearings, it cannot fully simulate specific working conditions such as gear meshing and bearing rolling

The movement of the motor-driven platform is used for loading, the loading range is small, and the loading of large loads cannot be achieved, and the loading response speed is not very high; and the most important problem is that due to the loading external force on one side of the friction ring, it is easy to cause due to The deformation of the shaft leads to uneven contact of the friction ring under eccentric load, which may affect the accuracy of the experimental results; the lack of a lubrication temperature control system makes it impossible to conduct friction ring rolling friction experiments at different temperatures and different lubrication conditions

Images