Rebound jet deflector electro-hydraulic servo valve

Abstract

The invention relates to a rebound jet deflector electro-hydraulic servo valve comprising a jet device, a power stage, a feedback device and a driving device; the jet device is arranged in a valve body and connected to the driving device, and comprises a jet disk, an oil return cavity arranged in the jet disk, and a deflector which is arranged in the oil return cavity and provided with a w-shapedslot; the power stage comprises a slide valve arranged in a valve sleeve, and is used for controlling the flow direction of fluid and regulating pressure and flow; the feedback device is used for feeding back offset, and comprises a feedback rod of one end is connected to a valve core of the slide valve, and the other end of the feedback rod is connected to the deflector; and the driving device comprises a torque motor and an armature component which are arranged on the valve body, and the driving device is used for driving the deflector to deviate, thereby driving the valve core of the slidevalve. Compared with an existing deflector servo valve, the electro-hydraulic servo valve adopts a rebound jet mode, and a V-shaped slot in the deflector is cancelled; and the electro-hydraulic servovalve has the advantages of higher reliability, long service life and the like.

Description

technical field [0001] The invention relates to the technical field of fluid control, in particular to a rebound jet type deflector plate electro-hydraulic servo valve. Background technique [0002] The jet deflector valve appeared in the 1970s. In 1967, the Moog Company of the United States researched and developed the jet stream servo valve of the deflector (see patent literature: Mcfadden, Edward F, Williams, Leonard J. Free jet stream deflector valve: US 3542051 [P] , 1970-11-24). Compared with the jet pipe servo valve, the main advantage of the deflector plate servo valve is that it does not need a coiled oil supply pipe, which eliminates the possible vibration in the structure, and has a simple structure and reliable operation. The key components of the deflector jet servo valve are the deflector plate and the jet disc, whose structure has a direct impact on the dynamic and static characteristics of the servo valve. Therefore, there have been a number of patents on th...

AI Technical Summary

Problems solved by technology

In 2004, Muchlis Achmad improved the structure of the jet tube servo valve, canceled the flexible oil supply pipe of the jet tube servo valve, arranged the jet port and the receiving port on the same side, and controlled it through the movement of the deflector plate with grooves cut above it. The flow entering the receiving port, this structure actually belongs to the jet servo valve of the deflector plate, but the heavy hammer type deflector plate has a large mass, which reduces the response speed of the servo valve (see patent literature: Muchlis Achmad.Methods and apparatus for splitting and directing a pressurized fluid jet within a servo valve: US 20060216167A1, 2006-9-28)

[0005] At present, most of the deflector jet servo valves developed and used adopt a deflector structure with a V-shaped window. For this structure, when the V-shaped window of the deflector is blocked or worn during work, it will affect the servo valve. The flow and pressure gain of the valve will cause the zero deviation of the servo valve at the same time, and even cause the servo valve to fail

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