Research On The Comprehensive Performance Optimization Of Gas Thermal Fatigue Test Equipment

With the development of the industry,the demand for industrial efficiency and energy utilization is increasing,which is reflected in the research of engine field is how to powerful work capability with less fuel consumption and emission.The improvement of engine working capability means that the engine needs to bear both higher mechanical and heat load,which puts an acid test on the reliability of the components of engine.Our research has been committed to the research of engine fatigue reliability.Via simulation calculation and building fatigue reliability test equipment,many achievements have been made in both theoretical and practical researches of engine fatigue life and thermal fatigue life.This paper research on the comprehensive performance optimization of the project group's original gas thermal fatigue test equipment and the main research and results are as follows:1)Based on the original test equipment,the cooling method is optimized to the alternating cooling,each cooling system is constant temperature and constant current.With the optimization,the test equipment can completely simulate the cooling environment of the piston and cylinder head under the working state and the idle state,which improve the accuracy of the thermal fatigue simulation test.2)Based on the original test equipment,the experiment range of the thermal fatigue life test is expanded from two piston to one to three pistons and cylinder heads,and the corresponding non-standard device is designed.With the optimization,the equipment can completely simulate the mechanical constraints and heat environment of the piston and cylinder head under the practical working state,which improve the accuracy of the thermal fatigue simulation test.3)The equipment is added devices of automatic ignition and flame detection,and additional recording equipment and a large number of sensors is also included in the optimization in order to completely monitoring the working state of the test equipment.The test software is written in C++ language to realize the complete automatic control and tests of the equipment,which greatly improves both the accuracy of the test and the comprehensive performance of the test equipment.After the optimization,the equipment can completely simulate the low cycle thermal fatigue cycle state of the piston and cylinder head,which provides a practical basis for the evaluation of the thermal fatigue life.