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CN-122014707-A - Valve core rotary high-speed switch valve

CN122014707ACN 122014707 ACN122014707 ACN 122014707ACN-122014707-A

Abstract

The invention discloses a valve core rotary high-speed switch valve which comprises a valve body and a valve core, wherein the valve body is provided with a left end cover and a right end cover, the valve core is rotationally connected with the end cover, a first oil outlet, a second oil outlet, a first oil return port, a second oil return port and an oil inlet are formed in the valve body, annular grooves communicated with the first oil return port, the second oil return port and the oil inlet are formed in the valve body, the valve core is driven to rotate by an external motor, a plurality of rectangular oil guide grooves are formed in the valve core and are correspondingly communicated with the first oil outlet, the second oil outlet and the annular grooves respectively, and the rectangular oil guide grooves are mutually matched with the first oil outlet, the second oil outlet and the annular grooves to realize high-frequency reversing of pressure oil at the oil outlet and the oil return port. According to the invention, the annular grooves communicated with the oil inlet and the oil return port are formed in the valve body, so that the processing quantity of the annular grooves of the valve core is remarkably reduced, the integral strength of the valve core is remarkably improved, and the working stability of the switching valve is improved.

Inventors

  • LIU HONGLIANG
  • ZHANG ZHIGUANG
  • GAO HAIPING
  • WU GANG
  • XIE XINLEI

Assignees

  • 中石化石油机械股份有限公司
  • 中石化石油机械股份有限公司数智装备与材料创新研究分公司

Dates

Publication Date
20260512
Application Date
20260203

Claims (9)

  1. 1. The spool rotary high-speed switch valve is characterized by comprising a valve body and a spool arranged in the valve body; The two ends of the valve body are respectively provided with a left end cover and a right end cover, the two ends of the valve core are respectively and rotatably connected with the left end cover and the right end cover, the valve body is provided with a first oil outlet, a second oil outlet, a first oil return port, a second oil return port and an oil inlet, the oil inlet is positioned between the first oil return port and the second oil return port, the valve body is axially provided with a plurality of annular grooves which are respectively communicated with the first oil return port, the second oil return port and the oil inlet, the oil inlet is communicated with an external high-pressure pump station, the first oil outlet and the second oil outlet are respectively communicated with an oil cavity of an external membrane head, and the first oil return port and the second oil return port are communicated with an external oil tank; One side of the valve core penetrates through the corresponding end cover to be connected with an external motor and is driven to rotate by the external motor, a plurality of rectangular oil guide grooves are formed in the valve core and are respectively communicated with the first oil outlet, the second oil outlet and the annular grooves correspondingly, and the rectangular oil guide grooves are matched with the first oil outlet, the second oil outlet and the annular grooves to realize high-frequency reversing of pressure oil at the oil outlet and the oil return port.
  2. 2. The spool-rotatable high-speed switching valve according to claim 1, wherein the spool is further provided with a plurality of pressure equalizing grooves which are arranged at intervals along the axial direction of the spool, any pressure equalizing groove is provided along the circumferential direction of the spool, and the pressure equalizing groove is not communicated with the first oil outlet, the second oil outlet, the first oil return port, the second oil return port and the oil inlet.
  3. 3. The spool rotary high-speed switching valve according to claim 1, wherein triangular transition grooves are symmetrically formed in both sides of one end of the rectangular oil guide groove communicated with the oil inlet through the annular groove.
  4. 4. The spool-rotatable high-speed switching valve of claim 1, wherein the first oil outlet, the second oil outlet, the first oil return port, the second oil return port, and the oil inlet are rectangular openings.
  5. 5. The spool rotary high-speed switching valve according to claim 4, wherein the circumferential angles of the valve body corresponding to the first oil outlet and the second oil outlet are coaxially aligned with the circumferential notch angles of the spool corresponding to the rectangular oil guiding grooves on the spool, and when the spool is in the neutral initial position, the throttling edges of the rectangular oil guiding grooves and the rectangular opening edges of the first oil outlet and the second oil outlet have no circumferential spacing angle and no radial overlapping amount so as to form zero-coverage fit.
  6. 6. The spool-rotatable high-speed switching valve according to claim 1, wherein the first oil return port and the second oil return port are disposed at 90 ° with respect to the valve body circumferential direction, and the oil inlet is disposed at 180 ° with respect to the first oil outlet and the second oil outlet in the valve body circumferential direction.
  7. 7. The spool-rotatable high-speed switching valve according to claim 1, wherein the rectangular oil guide grooves each have a width dimension and a depth dimension of 0.5mm.
  8. 8. The spool-rotatable high-speed switching valve according to claim 1, wherein an inner periphery of the valve body is clearance-fitted with an outer periphery of the spool.
  9. 9. The spool-rotatable high-speed switching valve of claim 1, wherein a sealing ring is embedded at the junction of the spool with the left and right end caps.

Description

Valve core rotary high-speed switch valve Technical Field The invention relates to the technical field of hydraulic equipment. More particularly, the present invention relates to a spool-rotatable high-speed switching valve. Background High-speed switching valves are key components of fluid control systems, whose performance directly affects the dynamic response and accuracy of hydraulic, pneumatic, and fuel systems. Traditional linear motion type high-speed switching valves (such as electromagnetic slide valves) are limited by mechanical inertia and friction, and are difficult to meet the requirements of high-frequency and high-precision control. In order to break through the limitation, the spool rotary high-speed switch valve is adopted to replace the linear motion type high-speed switch valve, so that the spool inertia of the spool rotary high-speed switch valve can be obviously reduced, the working frequency is greatly improved, the abrasion is obviously reduced, and the service life is prolonged, and therefore, the spool rotary high-speed switch valve is widely applied to hydraulic diaphragm type hydrogen compressors. The valve core rotary high-speed switch valve used in the hydraulic diaphragm type hydrogen compressor at present mainly comprises a valve core and a valve sleeve, wherein the valve core is provided with an annular oil guide groove, and the inertia of the valve core can be obviously reduced through the annular oil guide groove, but the following defects exist: 1) The valve core is too much in grooving, the annular oil guide groove seriously weakens the integral strength of the valve core, and the integral working stability is reduced; 2) The radial load of the valve core along the axial direction is unevenly distributed, so that the unbalanced load of the valve core is easily caused, and the working stability of the rotary valve is influenced; 3) By adopting a negative opening (positive covering) design, each reversing process is accompanied by larger pressure impact, and meanwhile, the working stability of the whole hydraulic system is greatly reduced under the influence of a water hammer effect; 4) Valve port interface mutations tend to cause large pressure and flow step responses. Disclosure of Invention The invention also aims to provide the valve core rotary high-speed switch valve which can remarkably reduce the processing quantity of the valve core ring grooves, remarkably improve the integral strength of the valve core and improve the working stability of the switch valve. To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a spool-rotating high-speed switching valve including a valve body and a spool disposed inside the valve body; The two ends of the valve body are respectively provided with a left end cover and a right end cover, the two ends of the valve core are respectively and rotatably connected with the left end cover and the right end cover, the valve body is provided with a first oil outlet, a second oil outlet, a first oil return port, a second oil return port and an oil inlet, the oil inlet is positioned between the first oil return port and the second oil return port, the valve body is axially provided with a plurality of annular grooves which are respectively communicated with the first oil return port, the second oil return port and the oil inlet, the oil inlet is communicated with an external high-pressure pump station, the first oil outlet and the second oil outlet are respectively communicated with an oil cavity of an external membrane head, and the first oil return port and the second oil return port are communicated with an external oil tank; One side of the valve core penetrates through the corresponding end cover to be connected with an external motor and is driven to rotate by the external motor, a plurality of rectangular oil guide grooves are formed in the valve core and are respectively communicated with the first oil outlet, the second oil outlet and the annular grooves correspondingly, and the rectangular oil guide grooves are matched with the first oil outlet, the second oil outlet and the annular grooves to realize high-frequency reversing of pressure oil at the oil outlet and the oil return port. Preferably, the valve core is further provided with a plurality of pressure equalizing grooves which are arranged at intervals along the axial direction of the valve core, any pressure equalizing groove is arranged along the circumferential direction of the valve core, and the pressure equalizing grooves are not communicated with the first oil outlet, the second oil outlet, the first oil return port, the second oil return port and the oil inlet. Preferably, triangular transition grooves are symmetrically formed in two sides of one end of the rectangular oil guide groove communicated with the oil inlet through the annular groove. Preferably, the first oil outlet, the second oil outlet, the fir