Method for evaluating compression relaxation rate of PTFE spring based on temperature

The invention discloses a method for evaluating the compression relaxation rate of a PTFE (polytetrafluoroethylene) spring based on temperature, which considers that the PTFE spring in a valve body absorbs larger heat energy due to the influence of fluid environment temperature, so that the molecular activation energy in the PTFE spring is influenced, and the service life of the PTFE spring is influenced, and combines the heating condition of the PTFE spring under the actual working condition with the compression relaxation rate of the spring, so that the compression relaxation rate of the PTFE spring is evaluated. According to the stress condition of the spring and the actual temperature of the spring in the working state, the stress relaxation rate of the spring under the actual temperature average value of the PTFE spring is obtained, and when the stress relaxation rate of the spring reaches a preset value, the PTFE spring is considered to be invalid. According to the method, the evaluation precision of th