Electro-hydraulic servo valve based on Ethercat bus

Abstract

The invention discloses an electro-hydraulic servo valve based on an Ethercat bus. The electro-hydraulic servo valve comprises a shell, a circuit board arranged in the shell, a pre-stage nozzle bafflevalve, a power-stage sliding valve and a torque motor. A field Ethercat slave station controller, an MCU, a servo valve driving unit, an inlet RJ45 interface and an outlet RJ45 interface are integrated on the circuit board, wherein the inlet RJ45 interface and the outlet RJ45 interface support the POE function. The pre-stage nozzle baffle valve and the power-stage sliding valve are driven by theservo valve driving unit to move through the torque motor; and at least two PHY interfaces are integrated in the field Ethercat slave station controller, wherein the two PHY interfaces are in two-waycommunication connection with an Ethercat master station and a next-stage Ethercat slave station through the inlet RJ45 interface and the outlet RJ45 interface separately. The electro-hydraulic servovalve is simple in wiring, and high in integration and reliability, and further has multiple functions of predictive maintenance, fault diagnosis and the like.

Description

technical field [0001] The invention relates to an Ethercat bus-based electro-hydraulic servo valve, which belongs to the field of high-end hydraulic components. Background technique [0002] The electro-hydraulic servo valve is a key component in the electro-hydraulic servo control. It is a hydraulic control valve that converts the current signal into hydraulic flow or pressure. The electro-hydraulic servo valve has the advantages of fast dynamic response, high control precision and long service life, and has been widely used in electro-hydraulic servo control systems in the fields of aviation, aerospace, ships, metallurgy, and chemical industry. The electro-hydraulic servo valve is the core control element of the hydraulic servo mechanism. At present, the traditional electro-hydraulic servo valve is still driven by analog current. When using it, each servo valve needs to be equipped with a special drive circuit board. The drive circuit board and the electro-hydraulic servo...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an electro-hydraulic servo valve based on the Ethercat bus to solve the problems of difficult wiring, insufficient monitoring ability, low real-time performance, and high delay in the prior art.

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