Development of a New Testing System for Reliability Assessment of Hydraulic Cylinder

Aiming at improving reliability of hydraulic cylinder and pertinent machine system, it is meaningful to promote reliability testing of the cylinder. In this work, a novel idea to organize reliability testing of hydraulic cylinder under normal or accelerated stress levels is proposed, the variable loading stresses applied include working pressure, velocity, side load and oil temperature of the cylinder. Modular design and development of the mechanical testing bench, the fluid power drive and control system with power recovery, and the computer-aided measurement and control system are implemented, with the integrated new testing system, an accelerated life test and prediction of reliability characteristics of an industrial hydraulic cylinder under normal stress level are successfully performed. The developed new testing system would provide an excellent test platform for hydraulic cylinder reliability assessment.