Conical sealing type hydraulic large-flow high-speed digital valve

A technology of conical surface sealing and large flow, which is applied in the field of solenoid valves, can solve the problems of lax closing, inability to open, and low electromagnetic efficiency, and achieve the effects of improved sealing effect, compact overall structure, and high electromagnetic efficiency

Active Publication Date: 2015-09-16
WEIFANG LICHUANG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The digital valve has the following points to be improved: 1) The electromagnet and electromagnetic coil are located at the end of the valve body, and the electromagnetic efficiency is low; 2) The sealing between the valve body and the valve core adopts surface contact, which is difficult to process. Uniform wear is prone to the problem of loose closing; moreover, the sealing surface in surface contact causes the area of ​​the hydraulic oil in the oil outlet to act on the closing direction of the valve core in the closed state of the valve to be larger than the area in the opening direction. The resultant force of the oil on the spool in the direction of movement is not zero, which will generate a force to close the spool, restrict the movement of the spool, and even prevent it from opening. Therefore, this structure can only be used in hydraulic control with low outlet pressure. limited use

Method used

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  • Conical sealing type hydraulic large-flow high-speed digital valve
  • Conical sealing type hydraulic large-flow high-speed digital valve
  • Conical sealing type hydraulic large-flow high-speed digital valve

Examples

Experimental program
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Effect test

Embodiment 1

[0014] like figure 1 As shown, the cone-sealed hydraulic high-flow high-speed digital valve includes a valve body and a valve core 2 slidingly installed in the valve body. An armature 22, a fixed armature 6 is installed in the valve body behind the moving armature 22, a spring 5 is arranged between the fixed armature 6 and the spool 2, and a through hole 21 that runs through the front and back is provided at the center of the spool 2. The valve body is provided with a liquid inlet 3 and a liquid outlet 4 , the liquid inlet 3 is arranged around the valve core 2 , and the liquid outlet 4 is located at one end of the valve body and on the axis of the valve core 2 . When the valve is opened, the liquid enters the inner cavity of the valve body through the liquid inlet 3, and then is discharged through the liquid outlet 4. The through hole 21 can introduce the liquid at the front end of the valve core 2 into the cavity at the rear end of the valve core 2, so that the valve core 2 ...

Embodiment 2

[0021] like image 3 As shown, the inner cavity of the front valve body 1 is provided with a boss 9 surrounding the valve core 2, and the front end of the boss 9 is provided with an inner tapered surface 34 in the shape of an inner chamfer, and the valve core 2 is provided with a There is an annular buffer tank 31 communicating with the liquid inlet 3 . like Figure 4 As shown, the front end of the buffer tank 31 is provided with an outer tapered surface 25 matching the inner tapered surface 34 , and the inclination angle G of the inner tapered surface 34 is greater than the inclination angle H of the outer tapered surface 25 . This embodiment is a normally open valve. When the valve core 2 moves to the rear end and the valve is closed, the outer cone surface 25 matches the inner cone surface 34 to form a seal. Since the inclination angles of the two cone surfaces are not equal, the seal here is determined by the inner cone surface. The innermost corner of the conical surfac...

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Abstract

The invention relates to the technical field of solenoid valves, in particular to a hydraulic high-flow high-speed digital valve with a solenoid valve arranged in the middle. The hydraulic high-flow high-speed digital valve comprises a valve body and a valve element arranged in the valve body in a sliding manner; the back end of the valve element is provided with a cylindrical moving armature in a sleeving manner; a fixed armature is arranged in the valve body behind the moving armature; the valve body comprises a front valve body, a back valve body and a spacer bush arranged between the front valve body and the back valve body; the front and back valve bodies are made of magnetic materials; the spacer bush is made of a non-magnetic material; the joint faces of the fixed armature and the moving armature are positioned in a coverage area of the spacer bush; an annular coil block is arranged outside the valve body in a sleeving manner. A solenoid coil is positioned in the middle section of the valve body, and the integral structure is more compact; the position of the fixed armature can be conveniently adjusted, so that a gap between the fixed armature and the moving armature is finely adjusted; taper faces with unequal inclination angles at the joint of the valve element and the valve body ensure the stress balance of the valve element, the sealing effect is improved, and leakage caused by nonuniform abrasion of a sealing face can be avoided.

Description

technical field [0001] The invention relates to the technical field of solenoid valves, in particular to a cone-surface sealed hydraulic large-flow high-speed digital valve. Background technique [0002] With the continuous improvement of the automation level in the hydraulic field, the demand for high-speed digital valves is increasingly urgent. Hydraulic unbalance forces increase with spool size and can severely affect spool movement. Therefore, the spool diameter of the current high-speed digital valve cannot be too large, that is, the flow rate is very small. The working pressure of a typical product is 20MPa, the flow rate is only 2-9 liters / min, and the frequency response is 5ms. Obviously, there is a long way to go before the flow rate of engineering hydraulic system reaches hundreds of liters per minute, or even higher. Chinese patent 2013101571439 discloses a "hydraulic large flow high-speed digital valve", which includes a valve body and a valve core slidingly i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/06F16K27/02F16K1/38F15B13/02
CPCF15B13/02F16K1/00F16K1/36F16K1/38F16K27/0254F16K27/029F16K31/0655F16K31/0675F16K31/0696
Inventor 吴龙龙
Owner WEIFANG LICHUANG ELECTRONICS TECH
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