Design And Research On The Hydraulic Test-bed Of Dump Truck Lift Cylinder

With the development of automotive technology, the production and the usage of domestic dump trucks is increasing, especially in the heavy front top tipper in recent years. While the continuous improvement of the heavy-duty dump truck vehicle center of gravity, its stability continue to lower. The hydraulic lift system quality is directly related to the safety of the dump truck, dump truck loading efficiency, work efficiency and maintenance costs. The former top-fuel tank of a dump truck usually use of the multi-stage fuel tank. Because the trip of fuel tank is longer, general test-bed can not be completed performance testing of such fuel tanks. In addition, China’s hydraulic cylinder detection technology relatively gets behind, which severely restricts the quality of the hydraulic cylinder products. The detection system of the hydraulic cylinder is toward the high-precision, highly intelligent, highly automated direction.The paper first describes the development and significance of the hydraulic cylinder test bench. By analyzing the common failure of the dump truck fuel tank, and in accordance with the relevant standards of the dump truck cylinder test, it analysis of the fuel tank of the pilot projects and test methods. On this basis, designs the structure of the system. The test system developed can automatically achieve prototype test and delivery test. The test system is mainly used for delivery test inspection of dump truck lift cylinder.The test system consists of the loading bench, hydraulic system and electrical control system. Firstly, design loading bench, taking into account the longer stroke of the fuel tank, in accordance with the relevant standards, to improve the fuel tank loading program.The mechanical structure of horizontal and parallel connection is designed for the loading bench, which can simulate the actual working condition of hydraulic cylinders. Secondly, the principle design of hydraulic system for hydraulic cylinder test system is carried out using electro-hydraulic proportional control technique. The hydraulic system can control the pressure and flow automatically. Thirdly, electric control system is designed based on the IPC and data acquired card, and a control software is developed using BCB and virtual instruments technology.In addition, The article also analyzed the loading principle and loading control programs of electro-hydraulic proportional valve, and selection sensors and other detection equipment.Finally, debugg the detection system and test run the experimental. Load bench test rig, hydraulic system and control the detection system when debugging a comprehensive debugging. Pilot project test operation procedures and steps are introduced during the trial run of the fuel tank. The detection system achieved the desired objectives to be completed by the detection of different levels, different bore stroke multi-stage cylinder. The detection system can automatically. complete the test, the detection accuracy, high reliability and testing efficiency.