Development and Life Evaluation of Rubber Sealing Materials for Subway Brake Devices
The blend of NBR/EPDM was used to improve aging resistance.CSM was used as the interfacial compatibilizer to improve the mechanical properties of NBR/EPDM blends.On this basis,the rubber sealing material of the standard subway brake device was prepared.Accelerated aging ex-periments at different temperatures were carried out to predict the service life of the rubber material based on Arrhenius equation.The results showed that the service life of the rubber material was 25 a at 35℃by using the elongation at break as the criteria.According to the temperature environment of the brake device,the minimum service life of the rubber material was 32 a.The rubber sealing material had no fatigue failure within 6.1 million times of fatigue test,and the fatigue life was far beyond the technical requirements and had a high safety margin.
standard subwaybrake devicerubber sealsaccelerated aginglife evaluationfatigue test
NETL
NSTL
万方数据
维普
