定量泵液压系统一般由定量泵和节流调速回路组成。目前在机械加工机床中应用较多,如磨床、插床、拉床及一些自动机床的主传动几乎都采用这种系统。但工厂普遍认为这种系统的效率很低,大量的功率损失使得使用费用相对于机械传动系统或电传动系统要高出很多。减小这种系统的功率损失, Quantitative pump hydraulic system is generally composed of quantitative pumps and throttling speed control circuit. Currently used in machining more machine tools, such as grinding machines, slotting machines, broaching machine and some of the main drive almost all automatic machine using this system. However, factories generally consider the efficiency of such a system to be very low, and a large amount of power loss makes the utilization cost much higher than that of a mechanical transmission system or an electric transmission system. Reduce the system’s power loss,