Development Of Test Device For Evaluating High Temperature Lubrication Performance Of Grease

With the continuous development of economy, more and more lubrication sections of mechanical equipment work in high temperature environments, the requirements of grease high temperature lubrication performance are also growing.Currently, there are neither dedicated single static evaluation methods and standards nor dynamic test methods and standards in China, there is also no dedicated single test method for evaluating high temperature performance of grease in the world. The paper aims to investigate the friction chemical mechanism of grease under high temperature conditions, establish appropriate evaluation methods, and ultimately develop practical grease high temperature performance test equipment to guide the development and application of grease.Firstly, the existing grease high temperature lubrication performance test methods are studied, their shortcomings are pointed out, the paper proposes a new evaluation method called critical temperature method.Secondly, according to the functional requirements and characteristics of the testing machine, three-dimensional design of testing machine mechanical structure is completed by SolideWorks and a set of measurement and control system is developed based on LabVIEW. The system includes the servo motor control system, the friction torque measurement system, temperature control system and test data storage system, and the electrical control box and friendly interface are developed to meet the system requirements and convenient to user operation.Finally, choose the reasonable test environment, test a variety of grease, analyze and compare the test datas, grease high temperature lubrication performance can be evaluated through grease friction coefficient-temperature (f-T) curves.The test results show that the testing machine can fully reflect the grease friction characteristics at different temperature points and it has a good ability to distinguish a variety of grease.