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A high-flow high-response proportional servo valve

A proportional servo valve, high-frequency response technology, applied in the field of proportional servo valve, can solve problems such as unfavorable actuator control, affecting valve working efficiency and dynamic performance, poor linearity of output signal of jet tube servo valve, etc. Simplicity, improved linearity and sensitivity, improved dynamic response

Inactive Publication Date: 2017-04-12
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the linearity of the output signal of the jet pipe servo valve is poor, it is not conducive to the control of the actuator. The jet reaction force will affect the working efficiency and dynamic performance of the valve. The quality of the main valve core is directly related to the frequency response.

Method used

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  • A high-flow high-response proportional servo valve
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  • A high-flow high-response proportional servo valve

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A high-flow high-response proportional servo valve. Such as figure 1 As shown, the large-flow high-response proportional servo valve includes an upper valve body 6, a lower valve body 4, a displacement adaptive assembly 1 and a valve core assembly 3, and a piston is arranged between the upper valve body 6 and the lower valve body 4. The base 5, the upper valve body 6, the piston base 5 and the lower valve body 4 are connected as a whole by bolts 8 concentrically.

[0037] The structure of the upper valve body 6 is as figure 2 and image 3 As shown: an upper cavity 9 , a middle cavity 11 and a lower cavity 12 are coaxially arranged in sequence from top to bottom, and the upper cavity 9 , the middle cavity 11 and the lower cavity 12 communicate with each other. The upper end of the upper cavity 9 is coaxially fixed with an elastic sealing support 14, the lower part of the jet tube 15 is coaxially located in the upper cavity 9 through the elastic sealing support 14, an...

Embodiment 2

[0048] A high-flow high-response proportional servo valve. Except following technical parameter, all the other are with embodiment 1.

[0049] The ratio of the diameter of the cylindrical cavity (19) to the diameter of the oil discharge hole (23) is 1: (0.7-0.8).

[0050] The main valve core (32) is a hollow cylinder, and the bottom of the hollow cylinder is in the shape of a truncated cone, and the cone angle of the truncated cone is 75° to 90°.

[0051] The included angle between the right oil passage 35 of the receiver and the left oil passage 36 of the receiver is 45°-60°.

[0052] The working process of this specific embodiment is: when the armature assembly 16 does not produce torque, the jet tube 15 is in the middle position of the receiver left oil passage 36 and the receiver right oil passage 35, that is, the zero position, and the receiver left oil passage 36 and the receiver The pressure oil flow rate received by the right oil passage 35 of the device is the same,...

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Abstract

The invention relates to a high-flow and high-frequency-response proportional servo valve. According to the technical scheme, an upper valve body (6), a piston base (5) and a lower valve body (4) are connected into a whole through bolts (8). The lower portion of a jet pipe (15) penetrates through an elastic sealing bearing part (14) fixed to the upper end of an upper cavity (9) of the upper valve body (6), and an armature assembly (16) is fixed to the upper portion of the jet pipe (15). A receiver (33) is fixedly installed inside the upper cavity (9), and the lower end face of the receiver (33) and the upper end face of a displacement sensor (34) are coaxially and fixedly connected. The lower portion of the displacement sensor (34) is movably inserted into a guide hole (28) of an upper piston rod section (29). The upper piston rod section (29) is movably installed in the lower portion of a middle cavity (11), a piston (26) is movably installed in a lower cavity (12) of the upper valve body (6), a lower connection rod section (31) movably penetrates through a through hole of the piston base (5), and a main valve element (32) is movably installed in a cylindrical cavity (19). The high-flow and high-frequency-response proportional servo valve has the characteristics of being simple in structure, convenient to maintain, and high in anti-pollution capacity, linearity and sensitivity.

Description

technical field [0001] The invention belongs to the technical field of proportional servo valves. Specifically, it relates to a proportional servo valve with large flow rate and high frequency response. Background technique [0002] In the hydraulic system, the proportional servo valve is one of the indispensable components. The proportional servo valve can continuously control the pressure, flow and direction of the oil in proportion to the input electrical signal. For example, the proportional servo valve is required to have the characteristics of large flow and fast response in the injection system of the injection molding machine and the quick discharge system of the large forging press. The large flow proportional servo valve mainly has the following types according to its pilot control mode: the pilot stage of the nozzle baffle servo valve and the pilot stage of the jet tube servo valve. The nozzle baffle servo valve has high requirements on the working medium, low ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02F16K31/124
Inventor 吴凛湛从昌陈奎生文小莉周娇
Owner WUHAN UNIV OF SCI & TECH
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