大型货车卸货用液压阀质量检测试验台的设计与实现
[Abstract]:With the rapid development of market economy, the loading capacity of large freight cars is increasing. The quality of reversing hydraulic valves for unloading has a direct impact on the safety and stability of automatic unloading of freight cars. It is required that the reversing hydraulic valves have the pressure above 30MPa. And strict requirements for its leakage performance. If the quality of reversing hydraulic valve is not up to standard, it is possible to turn over during unloading. Therefore, it is very important to test the quality and performance of this kind of reversing hydraulic valve. The traditional quality inspection methods are mainly manual clamping, manual operation and commutation, and the quality of valve body is detected by reading mechanical instruments. Generally, the data are not processed, recorded and analyzed, and no traceability of data is found. This backward detection method can no longer meet the quality requirements of modern production. The design and implementation of ultra-high pressure hydraulic reversing valve for testing and unloading, automatic clamping and accurate detection are realized. And how to realize the traceability query of inspection data becomes an urgent technical problem that enterprises need to solve. This paper makes full use of the advanced hydraulic CAT technology to develop a kind of hydraulic valve testing test-bed which can be used for the same type and many different products. The fluid analysis is carried out according to the internal structure of the valve body, and the structure of the testing system is optimized. Thus, the quality of reversing hydraulic valve is improved, and the safety performance of large truck is improved when unloading. First of all, according to the system requirements and combined with the quality inspection regulation of the multi-way reversing valve in TS16949, the reasonable test plan, test principle and test procedure are worked out, and the test bench can be used to detect the reversing hydraulic valve for unloading. According to the principle of computer test system, the control system with high performance-to-price ratio is designed, the hardware needed for the test bench is selected reasonably, and the motion performance of the hydraulic cylinder of the clamping hydraulic system is analyzed. The flow field structure of reversing hydraulic valve chamber for unloading is simulated and analyzed, which solves the problems of hydraulic shock, temperature rise and noise of hydraulic components. Finally, a man-machine friendly automatic detection software system is developed by using Delphi7.0 software. The function and testing method of each module are briefly explained, the research work of the full text is summarized, the shortcomings of the test bed are analyzed, and the optimization design work after the test bed is prospected. The reversing hydraulic valve quality test bench has been successfully used in the factory inspection of the hydraulic reversing valve of Wuhan Dongjiang Valve Manufacturing Co., Ltd., which provides a stable and reliable test platform for the hydraulic valve detection. After trial operation, the test bench meets the requirements of the enterprise, and greatly improves the efficiency of the quality inspection, and creates huge economic benefits for the enterprise.
【学位授予单位】:武汉理工大学
【学位级别】:硕士
【学位授予年份】:2012
【分类号】:TH137
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