Electro-hydraulic servo valve with damping throttling device and liquid container
An electro-hydraulic servo valve and restrictor technology, applied in servo motor components, fluid pressure actuating devices, mechanical equipment, etc., can solve problems such as weak anti-interference ability, and achieve the effect of improving anti-interference ability.
Inactive Publication Date: 2009-10-21
TONGJI UNIV
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Problems solved by technology
[0005] The main purpose of the present invention is to provide an electro-hydraulic servo valve with a damping restrictor and a liquid capacity, through hardware measures to solve the problem that the electro-hydraulic servo valve is not strong in anti-interference ability to extreme conditions such as vibration, centrifugal, impact, etc., to realize Stable output control of flow pressure of electro-hydraulic servo valve
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[0023] The present invention will be further described below in conjunction with the embodiments described in the accompanying drawings.
[0024] figure 1 It is a schematic diagram of the main part of an embodiment of the present invention. As shown in the figure, the torque motor is composed of the control coil 1, the permanent magnet 2 and the armature 3, and realizes the conversion between the input electric signal and the force. The conversion of force and displacement is realized by the armature 3, the lever and the feedback spring 4. The cavity between the baffle 4, the nozzle 5, the main valve cylindrical spool 7, the fixed throttle 10 and the damping throttle 8 constitutes a nozzle baffle hydraulic amplifier, which pushes the main spool 7 to move, thereby controlling the main spool The size of the restrictor realizes the stable control of pressure and flow. The displacement of the main valve core 7 is fed back to the nozzle 5 and the damping restrictors 8 and 12 by ...
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An electro-hydraulic servo valve with damping throttling device and liquid container comprises damping throttling devices at the two ends of a main valve core, and a valve jacket. The damping throttling devices at the two ends form a pair of geometrical cavities together with the ends of the main valve core and the valve jacket, and form a pair of geometrical cavities together with a fixed throttling device, a nozzle and the valve jacket, namely the liquid container. The two ends of the main valve core perform characteristic compensation using a damping throttling device, respectively; between the main valve core of a secondary control valve and the nozzle baffle plate of a primary control valve, two pairs of cavities are naturally formed by assembling the parts including the main valve core inside the valve, the nozzle, a baffle plate, the fixed throttling device, the damping throttling devices and a valve body. The two pairs of geometrical cavities form the liquid container for characteristic compensation. The invention uses an integrated structure, and the main valve portion of the electro-hydraulic servo valve stably controls output flux and pressure under the ultimate conditions of vibration, impact and centrifugation by comprehensive compensation of the two damping throttling devices and the two pairs of geometrical cavities.
Description
technical field [0001] The invention belongs to the technical field of mechanical parts, transmission devices and fluid control in mechanical engineering, and in particular relates to an electro-hydraulic servo valve with a damping restrictor and a liquid capacity. Background technique [0002] The development of hydraulic servo control technology has been widely used in various industrial products, especially the attitude control of aerospace vehicles is mostly controlled by hydraulic servo mechanism. As the core component of the hydraulic servo control system, the electro-hydraulic servo valve has high performance requirements and great technical difficulties. Because the working environment of the aircraft is very complex, often accompanied by extreme working conditions such as vibration, centrifugal, impact, etc., the valve body and the valve core produce instantaneous non-active control relative displacement, resulting in unstable output flow pressure of the valve body,...
Claims
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IPC IPC(8): F15B13/044
Inventor 訚耀保孟伟
Owner TONGJI UNIV