Test And Optimization Design Of Hydraulic Cylinder Test Bench

As an important executive component in reducing fin rays system of ships, fin rotation cylinder and its performance is directly concerned with the formal operation of reducing fin rays. So the performance test of fin rotation cylinders has great significance. Aimed at the current situation that hydraulic cylinder tests are mainly type test, the structure design, test contents and test methods of hydraulic cylinder test bench are improved. The simulation of the working condition under lateral loads and impacts are added to meet the needs of complicated undersea working conditions of fin rotation cylinders.Firstly, through the installation and debugging of the hydraulic cylinder test bench prototype independently designed by the university and the company, the type test and the lateral force test were completed. The shortcomings of the existing hydraulic cylinder test bench were analyzed and summarized. An optimized general solution was proposed from three inspects including test bench structure, test methods and hydraulic system.Secondly, with respect to test bench structure, to meet the needs of weight reduction and static and dynamic stiffness, the structure of the test bench was improved and optimized based on the topology optimization methods.17.5% weight was reduced while the reliability of the bench was guaranteed. With respect to test methods, the internal leakage measurement was conducted by high precision displacement sensor instead of measuring glass, thus the test accuracy and efficiency were remarkably improved. Then, the damage of lateral force to hydraulic cylinder was analyzed to further improve lateral force tests. Meanwhile, to meet the need of hydraulic cylinder’s reliability under the impact load and the test requirements of cushion chamber’s allowable stress, the impact test module was developed. As respect to hydraulic system design, the pressure regulating loop of hydraulic system was improved. The new model of reducing valve and slippage pump was chose to solve the problems appeared in prototype debugging, including the inaccuracy of system pressure control and malfunction of slippage pump. The performance of the system was improved.Lastly, the test contrast experiment was conducted again on the optimized hydraulic cylinder test bench. It was shown that the test bench could complete the type test on fin rotation cylinder and other test items under the lateral force. The structure of the optimized test bench was more convenient. The test was more precise, the test was more efficient and the test bench was more reliable.The optimized hydraulic cylinder test bench meets the needs of complicated undersea working conditions of fin rotation cylinder tests. It has clinical significance on hydrauliccylinder design and provides solid foundation to the improvement of quality of hydraulic cylinder.