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一、电液比例控制电液联动控制方式可分三大类,即电液开关控制、电液比例控制及电液伺服控制。就发展过程来看,首先出现的是电液开关控制。它以电作为发信装置,以液压阀控制执行机构,从而实现了电气和液压的联动,为各行各业广泛机械化、自动化提供了有力的工具。虽然在这种控制方式中,液流的压力和流量需靠人工手调,因而难于进行连续的、按比例的控制,闭环就更谈不上了,但是,直到今天绝大多数机器仍然采用这种控
First, the electro-hydraulic proportional control Electro-hydraulic linkage control can be divided into three categories, namely, electro-hydraulic switch control, electro-hydraulic proportional control and electro-hydraulic servo control. The development process, the first thing that appears is the electro-hydraulic switch control. It uses electricity as the sending device, controls the actuator with the hydraulic valve, thus realizes the electric and the hydraulic linkage, has provided the powerful tool for the extensive mechanization, the automation in all trades and professions. Although in this type of control the pressure and flow of the fluid flow are manually controlled, it is difficult to carry out a continuous, proportional control of the closed loop even less so, but until today most machines still use this Seed control