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CN-122014708-A - Slide valve device

CN122014708ACN 122014708 ACN122014708 ACN 122014708ACN-122014708-A

Abstract

The invention relates to a slide valve device, which belongs to the technical field of valves and is applied to aviation, aerospace and hydraulic machinery. The slide valve device comprises a shell, a valve sleeve, a valve core, a left end cover and a right end cover, wherein an oil return cavity is formed in two ends of the valve core, a fine slide core mechanism and a coarse slide core mechanism are arranged in two ends of the valve core, the fine slide core mechanism is communicated with an oil inlet cavity, the coarse slide core mechanism is communicated with a control cavity, the fine slide core mechanism is used for pushing the valve core to move towards one end of the coarse slide core mechanism, and the coarse slide core mechanism is used for pushing the valve core to move towards one end of the fine slide core mechanism. According to the invention, by combining sliding cores with different diameters at two ends with pressure change of a control cavity, left and right movement of the valve core is realized, and under the condition of ensuring the size and flow opening of the valve core with the same specification, the diameters of the sliding cores at two ends are reasonably matched, so that impact noise generated by movement of the valve core is reduced.

Inventors

  • Lu Lingzhong
  • LIU WEI
  • WANG JIANGTAO

Assignees

  • 西安航空制动科技有限公司

Dates

Publication Date
20260512
Application Date
20260317

Claims (10)

  1. 1. A slide valve device comprises a shell, a valve sleeve, a valve core, a left end cover and a right end cover, wherein the valve sleeve is fixedly arranged in the shell, the valve core is slidably arranged in the valve sleeve, the left end cover and the right end cover are respectively arranged at two ends of the valve sleeve and are fixedly connected with the shell, and the slide valve device is characterized in that: The two ends of the valve core are respectively provided with an oil return cavity, one end of the valve core facing the left end cover is provided with a thin sliding core mechanism, one end of the valve core facing the right end cover is provided with a thick sliding core mechanism, the thin sliding core mechanism is communicated with the oil inlet cavity, and the thick sliding core mechanism is communicated with the control cavity; the fine sliding core mechanism is used for pushing the valve core to move towards one end of the coarse sliding core mechanism, and the coarse sliding core mechanism is used for pushing the valve core to move towards one end of the fine sliding core mechanism; The oil return cavity, the oil inlet cavity, the control cavity and the working cavity are of independent cavity structures formed between the valve sleeve, the coarse slide core mechanism, the left end cover and the right end cover and the shell after being installed on the shell, the oil return cavity is communicated with an oil return port on the shell, the oil inlet cavity is communicated with an oil inlet on the shell, the working cavity is communicated with a brake port on the shell, the control cavity is communicated with an electromagnetic valve outside the slide valve device, and the control cavity is controlled to be communicated with oil inlet or oil return through the electromagnetic valve.
  2. 2. The spool valve assembly according to claim 1 wherein the fine slide core mechanism includes a fine slide core and a fine slide sleeve, the fine slide core being coaxially slidably mounted in a through hole of the fine slide sleeve, the inner side of the fine slide sleeve being fitted into and tightly fitted with one end of the valve sleeve, the outer side of the fine slide sleeve being fitted into and clearance fitted with a left end cap, the oil in the oil intake chamber being communicated with the end of the fine slide core facing the left end cap.
  3. 3. The spool valve assembly according to claim 2 wherein the coarse slide core mechanism includes a coarse slide core and a coarse bore slide sleeve, the coarse slide core being coaxially slidably mounted within a through bore of the coarse bore slide sleeve, the inner side of the coarse bore slide sleeve being embedded in and in close engagement with one end of the valve sleeve, the oil of the control chamber being in communication with the end of the coarse slide core facing the right end cap.
  4. 4. A slide valve arrangement as claimed in claim 3, wherein the clearance between the fine slide core and the fine bore slide sleeve and the clearance between the coarse slide core and the coarse bore slide sleeve are all within 0.01 mm.
  5. 5. A slide valve arrangement as claimed in claim 3, wherein the outer diameter walls of the fine and coarse slide cores are provided with pressure equalizing grooves for equalizing radial pressure to avoid sliding jamming.
  6. 6. The slide valve device according to claim 3, wherein the fine slide core mechanism and the coarse slide core mechanism further comprise throttle plugs, a left throttle plug is fixedly arranged at one end of the fine pore sliding sleeve of the fine slide core mechanism, which is far away from the valve core, a right throttle plug is fixedly arranged at one end of the coarse pore sliding sleeve of the coarse slide core mechanism, which is far away from the valve core, the left throttle plug and the right throttle plug have the same structure, and the throttle plugs are provided with through holes along the central axis; the fine hole sliding sleeve is of a stepped cylindrical structure, a radial first protruding part is arranged in the middle of the fine hole sliding sleeve, the first protruding part is clamped between the left end cover and the valve sleeve and is positioned at the position where the oil inlet cavity is positioned, a second radial groove is formed in the end part of one end of the fine hole sliding sleeve, which is embedded into the left end cover, a first radial hole is formed in the contact surface of the left end cover and the first protruding part, and oil in the oil inlet cavity enters the fine sliding core to face one end of the left end cover through the first radial hole, a radial gap of the fine hole sliding sleeve, the radial groove and a through hole of the left throttling screw plug; The coarse-bore sliding sleeve is of a stepped cylindrical structure, a radial second protruding portion is arranged in the middle of the coarse-bore sliding sleeve, the second protruding portion is clamped between the right end cover and the valve sleeve and located at the position where the control cavity is located, the right end cover is embedded in the outer side of the coarse-bore sliding sleeve and in clearance fit with the coarse-bore sliding sleeve, a fourth radial groove is formed in the end portion of the coarse-bore sliding sleeve, the contact surface of the right end cover and the second protruding portion is provided with a third radial hole, and oil in the control cavity enters the coarse-bore sliding core to face one end of the right end cover through the third radial hole, the radial gap of the coarse-bore sliding sleeve embedded in the right end cover, the fourth radial groove and the through hole of the right throttling screw plug.
  7. 7. The slide valve device of claim 6, wherein the spool is a solid stepped shaft, and has an outer diameter provided with a third protruding portion and a fourth protruding portion protruding radially, a first concave portion is formed between the third protruding portion and the fourth protruding portion, and a second concave portion is formed at an outer side of the fourth protruding portion away from the third protruding portion; When the valve core is positioned at the leftmost end, the second oil return cavity and the first working cavity are communicated through the second concave part, and when the valve core is positioned at the rightmost end, the second oil inlet cavity and the first working cavity are communicated through the first concave part.
  8. 8. A slide valve device according to claim 3, wherein the fine-hole sliding sleeve and the coarse-hole sliding sleeve are each of a cylindrical tubular structure; The oil in the oil inlet cavity passes through the first axial gap, the radial gap at the position where the fine pore sliding sleeve is embedded in the left end cover, and the fifth radial groove enters the end of the fine sliding core facing the left end cover; the rough hole sliding sleeve is embedded in the valve sleeve, the outer end of the rough hole sliding sleeve is flush with the valve sleeve, a second axial gap is arranged between the valve sleeve and the right end cover, the second axial gap is positioned at the control cavity, and oil in the control cavity enters one end of the rough sliding core facing the right end cover through the second axial gap.
  9. 9. The spool valve device according to claim 8, wherein the spool is a stepped shaft having a through hole along an axis, a fifth protruding portion and a sixth protruding portion protruding radially are provided on an outer diameter thereof, a third recessed portion is formed therebetween, and a fourth recessed portion is formed on an outer side of the sixth protruding portion away from the fifth protruding portion; When the valve core is positioned at the leftmost end, the third oil return cavity and the second working cavity are communicated through the fourth concave part and the radial gap between the coarse sliding core and the valve sleeve; The third oil return cavity is communicated with two ends of the valve core through a through hole in the center of the valve core and is used for connecting the oil return cavity.
  10. 10. A slide valve device according to claim 1, characterized in that the valve sleeve is provided with a plurality of sealing ring grooves on its outer diameter for mounting sealing rings by means of which hydraulic isolation between adjacent chambers is achieved.

Description

Slide valve device Technical Field The invention relates to the technical field of valves, in particular to a slide valve device. Background The slide valve is a hydraulic or pneumatic structure commonly used in the field of aerospace machinery, and through the movement of the slide valve and the combination of the valve sleeve and the slide valve structure, the change of the direction of liquid flow or air flow is realized, and the corresponding product function is realized. When the slide valve works under the action of liquid flow or gas flow, the valve core moves to collide with a stop piece at the end part of the valve core, and the collision force is high due to the high-pressure characteristic in the aerospace field, so that noise is caused. Fig. 1 shows a slide valve structure of a shut-off valve in the field of aviation brake, which has the disadvantage of larger noise, and when in operation, the third valve core 003 collides with the third left end cover 005, and the impact noise reaches more than 100dB when in actual measurement. Therefore, it is necessary to improve the existing slide valve structure, and on the basis of not changing the circulation function performance of the slide valve, the movement impact of the slide valve is reduced, and the working noise of the slide valve is reduced. Disclosure of Invention The technical problems to be solved are as follows: In order to avoid the defects of the prior art, the invention provides the slide valve device, wherein through the design of a serial structure, an oil return cavity and a slide core mechanism are respectively designed at two ends of a valve core, the slide cores with different diameters at the two ends are combined with the pressure change of a control cavity, so that the left and right movement of the valve core is realized, and under the condition of ensuring the size and the flow opening of the valve core with the same specification, the diameters of the slide cores at the two ends are reasonably matched, so that the impact noise generated by the movement of the valve core is reduced. The technical scheme is that the slide valve device comprises a shell, a valve sleeve, a valve core, a left end cover and a right end cover, wherein the valve sleeve is fixedly arranged in the shell, the valve core is slidably arranged in the valve sleeve, the left end cover and the right end cover are respectively arranged at two ends of the valve sleeve and are fixedly connected with the shell, and the slide valve device is characterized in that: The two ends of the valve core are respectively provided with an oil return cavity, one end of the valve core facing the left end cover is provided with a thin sliding core mechanism, one end of the valve core facing the right end cover is provided with a thick sliding core mechanism, the thin sliding core mechanism is communicated with the oil inlet cavity, and the thick sliding core mechanism is communicated with the control cavity; the fine sliding core mechanism is used for pushing the valve core to move towards one end of the coarse sliding core mechanism, and the coarse sliding core mechanism is used for pushing the valve core to move towards one end of the fine sliding core mechanism; the oil return cavity, the oil inlet cavity, the control cavity and the working cavity are of independent cavity structures formed between the valve sleeve, the coarse slide core mechanism, the left end cover and the right end cover and the shell after being installed on the shell, the oil return cavity is communicated with an oil return port on the shell, the oil inlet cavity is communicated with an oil inlet on the shell, the working cavity is communicated with a brake port on the shell, the control cavity is communicated with an electromagnetic valve outside the slide valve device, and the electromagnetic valve is used for controlling the control cavity to be communicated with oil inlet or oil return. The fine sliding core mechanism comprises a fine sliding core and a fine sliding sleeve, wherein the fine sliding core is coaxially and slidably arranged in a through hole of the fine sliding sleeve, the inner side of the fine sliding sleeve is embedded into one end of a valve sleeve and is tightly matched with the valve sleeve, the outer side of the fine sliding sleeve is embedded into a left end cover and is in clearance fit with the left end cover, and oil in an oil inlet cavity is communicated with one end of the fine sliding core facing the left end cover. The invention further adopts the technical scheme that the coarse sliding core mechanism comprises a coarse sliding core and a coarse hole sliding sleeve, the coarse sliding core is coaxially and slidably arranged in a through hole of the coarse hole sliding sleeve, the inner side of the coarse hole sliding sleeve is embedded into one end of the valve sleeve and is tightly matched with the valve sleeve, and oil in the oil inlet cavity is communicated with one e