Rotary direct drive type electro-hydraulic servo valve
An electro-hydraulic servo valve, driven technology, applied in servo motor components, valve details, valve devices, etc., can solve problems such as the inability to apply the electro-hydraulic servo valve structure, the inability to apply the spool to rotate the direct drive valve, etc., and achieve a simple structure. , the effect of reducing friction and reducing side clearance leakage
Active Publication Date: 2022-05-13
TONGJI UNIV
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Problems solved by technology
[0003] Chinese patent CN207609815U discloses a direct-drive servo valve with a push-pull structure. The direct-drive valve is realized by using a flexible rod structure connected by a lead screw arranged at both ends of the valve core The redundant configuration of the drive mechanism, when one end fails, the other end can continue to work, but this patent cannot be applied to the rotary direct drive electro-hydraulic servo valve structure
Chinese patent CN211288293U discloses a plug-in rotary direct-drive electro-hydraulic servo valve. A hydraulic amplifying mechanism is designed between the actuating driver and the valve core, which reduces the torque requirement of the servo valve on the actuator. However, this patent can only Applied to direct drive valves with spool rotation, not applicable to rotary direct drive valves with linear motion of spools
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[0025] The invention relates to a rotary direct-drive electro-hydraulic servo valve, the structure of which is referred to figure 1 , figure 2 . Such as figure 1 , figure 2 As shown, the servo valve includes a controller 1 , a driving motor 2 , a pressing plate 3 , a valve body 4 , a support member 5 and a valve core 6 . The valve core 6 is sleeved in the valve body 4, and the centers of the valve body 4 and the valve core 6 are provided with flow passages. A sunken hole is provided in the middle of the flow channel of the valve body 4 for accommodating the support member 5 , and the sunken hole is arranged at the bottom of the flow channel of the valve core 6 .
[0026] The controller 1 is connected to the drive motor 2, and the drive motor 2 is inserted into the valve body 4 through two pressure plates 3 to form a tight connection, that is, the end surface of the valve body 4 corresponding to the direction of the controller 1 corresponds to the rotation axis of the dri...
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The invention relates to a rotary direct drive type electro-hydraulic servo valve which comprises a controller, a drive motor connected with the controller and a valve body connected with the drive motor, a valve element is sleeved with the valve body, a flow channel is formed in the center of the valve body and the center of the valve element, a rotary shaft of the drive motor is inserted into the valve element after being inserted into the valve body, and the rotary shaft of the drive motor is connected with the controller. The valve element is internally provided with a supporting structure used for reducing friction at the joint of a rotating shaft of the driving motor and the valve element, and a flexible structure arranged in the valve element and used for reducing a backlash between the driving motor and the valve body caused by the counter-acting force of the valve element to the driving motor. Compared with the prior art, the servo valve has the advantages that friction of a driving structure is reduced, the stability of the servo valve is improved, and the service life of the servo valve is prolonged.
Description
technical field [0001] The invention relates to the technical field of hydraulic control components, in particular to a rotary direct drive electro-hydraulic servo valve. Background technique [0002] The direct-drive electro-hydraulic servo valve uses an electro-mechanical conversion device to directly drive the main valve spool, which overcomes the traditional electro-hydraulic servo valve with pre-stage mechanical feedback represented by double-nozzle baffle servo valves and jet tube servo valves. Liquid servo valves are difficult to overcome, such as poor anti-pollution ability, large internal leakage, and harsh processing technology. At the same time, they have the advantages of simple structure, low cost, high reliability, and easy self-testing. The existing rotary direct-drive electro-hydraulic servo valve mostly uses the driving interface in the form of eccentric small ball pair to realize the conversion between the rotary motion of the torque motor and the linear mo...
Claims
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Login to View More IPC IPC(8): F15B13/02F16K31/04
CPCF15B13/021F16K31/04
Inventor 陆亮徐寅鹏李梦如
Owner TONGJI UNIV