Two-dimensional servo valve with double sensitive cavities
A sensitive cavity, servo valve technology, applied in servo motor components, valve details, multi-port valves, etc., can solve the problems of high processing and assembly accuracy, large pilot leakage power consumption, poor anti-pollution ability, etc. The effect of reducing processing difficulty and strong anti-pollution ability
Pending Publication Date: 2022-03-29
ZHEJIANG UNIV OF TECH
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Problems solved by technology
The nozzle baffle type electro-hydraulic servo valve currently on the market has poor anti-pollution ability, complex structure, high processing and assembly precision
The jet pipe electro-hydraulic servo valve is used instead of the nozzle baffle electro-hydraulic servo valve as the pilot stage. Although the anti-pollution performance of the valve is improved to a certain extent, it is at the expense of larger pilot leakage power consumption.
Although the two-dimensional servo valve with a single sensitive cavity overcomes the problems of poor anti-pollution ability, complex structure, and high processing and assembly precision of the nozzle baffle electro-hydraulic servo valve currently on the market, it has a slow response speed and high processing difficulty.
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[0043] The technical solution of the patent of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0044] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear ” and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or...
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A double-sensitive-cavity two-dimensional servo valve comprises a valve body and a torque motor, the valve body comprises a valve element and a valve sleeve, and the valve element is arranged in the valve sleeve in a rotatable and axially movable mode; four shoulders are arranged on the valve element, the right side of the valve element is connected with a rotating plate, and the rotating plate is connected with an armature of the torque motor through a rotating frame; and the pressure of the right sensitive cavity is controlled by two hydraulic resistance half bridges which are formed by connecting a first groove, a second groove and a first spiral groove in series and have small square areas, and two hydraulic resistance half bridges which are formed by connecting a third groove and a fourth groove and a third spiral groove in series and have small square areas. And the pressure of the left sensitive cavity is controlled by two hydraulic resistance half bridges which are formed by connecting a second groove, a third groove and a second spiral groove in series and have small square areas, a fourth groove and two hydraulic resistance half bridges which are formed by connecting a first groove and a fourth spiral groove in series and have small square areas. The double sensitive cavities are added, the axial pressure difference is increased to two times of the original pressure difference, and the response speed is higher.
Description
technical field [0001] The invention relates to a two-dimensional servo valve with double sensitive chambers. Background technique [0002] In the electro-hydraulic servo control system, the electro-hydraulic servo valve plays the role of electromechanical conversion and signal amplification, and has a decisive impact on the performance of the entire system to a large extent. The nozzle baffle type electro-hydraulic servo valve currently on the market has poor anti-pollution ability, complex structure, and high processing and assembly precision. The jet pipe electro-hydraulic servo valve is used instead of the nozzle baffle electro-hydraulic servo valve as the pilot stage. Although the anti-pollution performance of the valve is improved to a certain extent, it is at the expense of large pilot leakage power consumption. Although the two-dimensional servo valve with a single sensitive chamber overcomes the problems of poor anti-pollution ability, complex structure, and high p...
Claims
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IPC IPC(8): F16K11/078F16K31/06F15B13/02
CPCF16K11/078F16K31/0613F15B13/02
Inventor 李胜季剑波宋占凯阮健曹杰薛任政
Owner ZHEJIANG UNIV OF TECH