Electro-hydraulic servo valve with stroke braking controlled by servo motor
An electro-hydraulic servo valve and servo motor technology, applied in servo motors, servo motor components, mechanical equipment, etc., can solve the problems of slow commutation speed and poor commutation accuracy, and achieve the effect of simple structure and high control accuracy.
Pending Publication Date: 2022-05-20
范文豹
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Problems solved by technology
[0005] At present, the hydraulic transmission uses an oil cylinder to drive the workbench, which has the advantages of stable movement and reversing and large driving force, but the reversing accuracy is poor and the reversing speed is slow, so it is considered impossible to be used in CNC machine tools.
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Embodiment 1
[0021] Example 1, such as figure 1 , figure 2 with image 3 As shown, the electro-hydraulic servo valve controlled by a servo motor for stroke braking includes a servo motor 1, a PT valve 3, an AB valve 4, a valve body 5 and a feedback gear 6, and the AB valve 4 and the feedback gear 6 are connected by a flat key The servo motor 1 is arranged on the outside of one end of the valve body 5, and is connected with the outer end of the PT valve 3 arranged in the inner cavity of the valve body 5 through a coupling 2; the AB valve 4 is arranged in the inner cavity of the valve body 5 and The end faces of the PT valve 3 are arranged oppositely; the second bearing 5.2 is arranged between the outer end of the AB valve 4 and the valve body 5, and the first bearing 5.1 is arranged between the outer end of the PT valve 3 and the valve body 5, which is used to support the PT valve. 3 and AB valve 4 to limit the position; the inner wall of the valve body 5 is provided with four annular gr...
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The invention belongs to the technical field of hydraulic reversing valves, and particularly relates to an electro-hydraulic servo valve with stroke braking controlled by a servo motor. Comprising a servo motor, a PT valve, an AB valve, a valve body and a feedback device. The servo motor is arranged at one end of the valve body and connected with the outer side end of the PT valve arranged in an inner cavity of the valve body through a coupler. The AB valve is arranged in the inner cavity of the valve body and is opposite to the end surface of the PT valve; a bearing for limiting is respectively arranged between the AB valve and the valve body and between the PT valve and the valve body; the PT valve and the AB valve are end face rotary valves; and the outer side end of the AB valve is connected with a feedback device arranged at the other end of the valve body. According to the hydraulic servo valve, a hydraulic oil cylinder which is stable in movement and reversing and large in thrust can be rapidly and accurately controlled, it is expected that the hydraulic servo valve is used for a numerical control machine tool instead of a ball screw, and especially a small servo motor can be used for controlling the numerical control machine tool of a large machine through the hydraulic servo valve.
Description
technical field [0001] The invention belongs to the technical field of hydraulic reversing valves, in particular to an electro-hydraulic servo valve whose travel braking is controlled by a servo motor. Background technique [0002] Traditional theories at home and abroad now believe that travel braking can only be used in the low-speed range of the workbench, and travel braking is currently used in the low-speed range. [0003] In the existing electro-hydraulic stepping motor, the hydraulic valve is a slide valve, and the stepping motor is a rotary motion, which needs to be converted into an axial motion through the screw thread, which results in a decrease in precision and an increase in the amount of reverse air travel, so it is rarely used. . [0004] The current CNC machine tools are inseparable from the ball screw, the structure of the ball screw is complex, there are high requirements for installation accuracy, the nut generates a lot of heat, and the heat is transfer...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F15B13/02F15B9/09F15B21/02
CPCF15B13/02F15B9/09F15B21/02
Inventor范文豹
Owner范文豹