Zero-position-adjustable two-dimensional motor direct-drive electro-hydraulic servo valve

Abstract

The invention discloses a zero-position-adjustable two-dimensional motor direct-drive electro-hydraulic servo valve which comprises a sliding valve assembly, a two-dimensional motor, a magnetic steel zero-setting reset mechanism and a displacement sensor which are coaxially arranged. The sliding valve assembly is of a traditional two-dimensional servo valve structure, a two-dimensional motor can directly drive a valve element to rotate so as to control the opening size of a valve port, a magnetic steel zero setting and resetting mechanism is used for zero setting and resetting of the valve, and a displacement sensor can monitor the position of the valve element in real time and feed back signals to achieve closed-loop control. According to the servo valve, the valve element is directly driven through the two-dimensional motor, a transmission mechanism of a traditional two-dimensional valve is omitted, the electro-mechanical conversion process is simplified, non-contact zero adjustment and reset are achieved through the magnetic steel zero adjustment and reset mechanism, contact abrasion is reduced, and the service life of the servo valve can be prolonged. In addition, the two-dimensional motor is of a wet-type rotor structure, heat dissipation can be improved, meanwhile, the problem of high-pressure dynamic sealing is avoided, and the overall reliability is improved.

Description

technical field [0001] The present application relates to the technical field of motors, in particular to a two-dimensional motor direct-drive electro-hydraulic servo valve with adjustable zero position. Background technique [0002] Servo valve is not only an electro-hydraulic conversion element, but also a power amplifying element. It connects the electrical part with the hydraulic part to realize the conversion and amplification of electro-hydraulic signals. Its performance largely determines the performance of the entire electro-hydraulic control system. Compared with ordinary servo valves, two-dimensional servo valves have many advantages, such as large flow, small size, high frequency response, strong anti-pollution ability, simple structure and low cost. [0003] The inventor of the present application found in the long-term research and development that the current two-dimensional servo valve generally drives the transmission mechanism through the motor, and the tran...

AI Technical Summary

Problems solved by technology

[0004] This application provides a two-dimensional motor direct-driven electro-hydraulic servo valve with adjustable zero position, to solve the electric problem caused by the connection of the valve body with the motor through the transmission mechanism and the use of a spring structure for zero adjustment and reset in the two-dimensional servo valve in the prior art. -Technical problems such as complex machine conversion, contact wear, high-pressure dynamic seal, etc.

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