现有的压力模拟器是计算机控制伺服阀加减压实现压力模拟,但由于液体压缩率小,系统泄漏以及空气溶解导致降压较快,压力难以持续稳定,同时微小的体积变化引起较大的压力波动,高精度的压力自动控制较为困难。针对快捷高精度压力自动模拟的需要,研制了一种齿轮泵动态压力模拟器,介绍了其组成、工作原理、关键设计和具体设计应用,计算机PID闭环控制变频电机驱动齿轮泵动态加压,研制两级稳压腔、节流孔、回油孔组合的节流稳压器实现消波稳压,解决齿轮泵产生的压力脉动,经过试制和测试,压力波动小,稳压精度高,加减压平顺快捷,验证了高精度动态稳压技术和模拟器的性能。
Abstract
Traditional pressure simulator use computer-controlled servo valve to achieve automatic pressure calibration, but because of the small liquid compression rate, system leakage and air dissolution resulting in rapid pressure reduction, at the same time, the small volume change causes the big pressure fluctuation, so it is difficult to control the pressure automatically with high precision. A gear pump dynamic pressure simulator is developed to meet the need of quick and high precision pressure automatic simulator. Throttling regulator is developed to eliminate pressure pulsation caused by gear pump. after trial-manufacture and test, the pressure fluctuation is small, the precision of pressure stabilization is high, and the adding and reducing pressure is smooth and fast, the high precision dynamic voltage stabilization technology and the performance of the pressure simulator are verified.
关键词
液压 /
压力模拟器 /
节流稳压器 /
动态加压
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