The Application Of Digital Control On The Hydraulic Pump Performance Test

Hydraulic pump, one of the hydrokinetic components, is the heart of the whole hydraulic system in the fluid transmission and control technology. The performance of the whole hydraulic system, even the stabilization of the whole system is seriously affected by the performance of hydraulic pump. With the rapid development of the hydraulic technology and computer control technology, the high performance and high quality hydraulic pump is actively demanded in the engineering application. Therefore, the study of the testing technique, especially the computer aided testing technique is very important in the practical application.Till now, the items of most of the hydraulic pump performance experiment stands are not enough. The style of hydraulic pump that can be tested is single and the level of the computer integration is not high. All these lead to that the enterprises are unable to evaluate the high performance and high quality hydraulic pump and can't adapt to the need of the rapid development of the market.Based on the upward considerations, analyzing the hydraulic CAT system at home and abroad, the author improved the present hydraulic pump performance experiment stand of the hydraulic factory of Fuzhou University. Based on the idea of computer automatic control of mechanical, electric and fluid integration, an idea of computer digital control of hydraulic pump test was put forward and an advanced hydraulic pump performance experiment stand was designed in the present dissertation. It can be adapted to the quick, accurate and reliable testing of the low, medial and high pressure pump.In the present control system, the technology of variable frequency speed governing was used in the driving system of the experiment stand and the advanced stepping digital overflow valve was adopted in the part of loading. It was new face that the computer digital control was used in the testing technique. And it was helpful to further study on the digital design of the hydraulic pump performance testing.The measure of hardware was adopted to deal with the in-out sign of testing system in the present dissertation. It strengthened the anti-jamming performance of the system and increased the precision of the computer testing. The application software with friendly interface was worked out in the same time. And the latent potential of the hardware system was fully excavated. Finally the specimen examination was carried out aiming at the practical production. The results showed that the system had the fine practicability and the portable system software had the fine commonality that was applicable for other hydraulic control system.Through the design, the author expected that the present study would throw out a brick to attract a jade and would inject the new blood into the traditional hydraulic technology that was intelligent information technology (IT). And it would promote the further development of domestic hydraulic industry.