The working principle of electro-hydraulic servo system
Release time:
2020-10-28 13:20
Source:
electro-hydraulic servo systemIt is a relatively young industrial technology, an important branch of hydraulic technology, and one of the basic technical components of modern control engineering. There are usually two types of open loop and closed loop. In recent years, as the demand for high-response, high-precision, high-power ratio, and high-power hydraulic control systems in my country's manufacturing industry continues to expand, the research on electro-hydraulic servo control systems has become more and more extensive. Our country has also made great progress.
electro-hydraulic servo systemIts working principle is to compare the command signal sent by the automatic control system with the actual position signal of the cylinder in the servo controller, and amplify the error signal and send it to the electro-hydraulic servo valve. Servo valve according to a certain proportion of the current signal is converted into the amount of hydraulic oil to drive the cylinder movement. The feedback signal sent by the position sensor changes continuously until the command signal is equal and the cylinder stops moving. The cylinder stops at a specified position to stabilize the transparent blade at a certain opening. The linear motion of the cylinder is turned into the rotary motion of the valve plate (static vane) through a set of cranks, thereby changing the working opening of the valve plate or fixed vane. With the continuous change of the system signal, the opening of the transparent fixed blade will also change continuously, and through the change of the opening of the fixed blade, the purpose of controlling the number of revolutions, controlling the gas flow and controlling the speed is achieved. The output of the turbine is controlled.
electro-hydraulic servo systemIt also has many advantages, the most prominent of which is fast response speed, large output power and high control accuracy. Therefore, it has been widely used in aviation, aerospace, military, metallurgy, transportation, engineering machinery and other fields. Electro-hydraulic servo technology is the best technical means to realize dynamic high cycle fatigue, programmed fatigue and low cycle fatigue as well as static constant deformation rate, constant load rate and various analog simulation test systems.
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