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CN-121993534-A - Rigidity valve

CN121993534ACN 121993534 ACN121993534 ACN 121993534ACN-121993534-A

Abstract

The application discloses a rigidity valve which comprises a valve seat, a valve block and a sealing assembly, wherein the sealing assembly is in limiting connection with the valve seat in the axial direction, the valve block is inserted into the sealing assembly and can move relative to the sealing assembly in the axial direction to close or open a valve opening of the valve seat, the valve block comprises a large-diameter part and a small-diameter part, the large-diameter part is positioned above the small-diameter part, a first downward step surface is formed at the connection part of the large-diameter part and the small-diameter part, the sealing assembly is provided with an inserting hole part in guiding fit with the small-diameter part, the sealing assembly is provided with a sealing lip in an annular structure, the sealing lip protrudes out of the hole wall surface of the inserting hole part, the outer diameter of the small-diameter part is not larger than the minimum inner diameter of the sealing lip, the outer diameter of the large-diameter part is larger than the minimum inner diameter of the sealing lip, and the sealing lip deforms under the extrusion action of the first step surface under the sealing action of the valve block to form sealing with the outer peripheral wall surface of the first step surface and the small-diameter part under the state that the valve opening is closed. The rigidity valve can reduce the valve closing driving force and improve the valve opening response speed through optimizing the related sealing structure.

Inventors

  • Request for anonymity

Assignees

  • 浙江三花智能控制股份有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (10)

  1. 1. The stiffness valve is characterized by comprising a valve seat, a valve block and a sealing assembly, wherein the sealing assembly is in limiting connection with the valve seat in the axial direction, the valve block is inserted into the sealing assembly, and the valve block can move relative to the sealing assembly in the axial direction so as to close or open a valve opening of the valve seat; The valve block comprises a large-diameter part and a small-diameter part, the large-diameter part is positioned above the small-diameter part, and a first downward step surface is formed at the joint of the large-diameter part and the small-diameter part; The sealing assembly is provided with an inserting hole part in guiding fit with the small-diameter part, and is provided with a sealing lip with an annular structure, and the sealing lip protrudes out of the hole wall surface of the inserting hole part; The outer diameter of the small-diameter part is not larger than the minimum inner diameter of the sealing lip, and the outer diameter of the large-diameter part is larger than the minimum inner diameter of the sealing lip; The sealing lip is deformed by the pressing action of the first step surface in a state where the valve block closes the valve opening portion, so as to form a seal with the first step surface and the outer peripheral wall surface of the small diameter portion.
  2. 2. The stiffness valve of claim 1 wherein the seal assembly includes a support and a seal, the seal being integral with the support, the support having a hardness greater than the hardness of the seal, the seal lip being formed in the seal, the socket portion being formed in the support.
  3. 3. The stiffness valve of claim 2 wherein the support includes a first support portion above the seal and a second support portion below the seal, the peripheral wall of the seal protruding from the peripheral wall of the support, the peripheral wall of the seal being in interference engagement with the peripheral wall of the valve cavity of the valve seat.
  4. 4. A stiffness valve according to claim 3 wherein the peripheral wall of the seal is a convex arcuate surface.
  5. 5. A rigidity valve according to claim 3, wherein the insertion hole portion is formed in the second support portion, and the first support portion has a through hole having a diameter larger than a maximum inner diameter of the seal lip.
  6. 6. The stiffness valve according to claim 5 wherein the second support portion includes a cylindrical portion extending axially upward and into which the seal is inserted, a portion of the socket portion being formed in the cylindrical portion, the sealing lip being located at an upper end of the cylindrical portion.
  7. 7. The stiffness valve according to any of the claims 1 to 6 wherein the sealing lip is also inclined in the axial direction towards the side of the first step surface.
  8. 8. The stiffness valve according to any of claims 1 to 6 further comprising a head member, the valve cavity of the valve seat having an upwardly facing second stepped surface that supports the seal assembly, the head member pressing against an upper end surface of the seal assembly.
  9. 9. The stiffness valve according to claim 8, wherein the head member includes a connecting portion and a head portion, the head portion includes a main body portion and an extending portion extending downward from a lower end of the main body portion, a downward stepped surface is formed at a junction of the extending portion and the main body portion, the extending portion is fixedly inserted into an inner hole portion of the connecting portion, the stepped surface abuts against an upper end surface of the connecting portion, and a lower end surface of the connecting portion abuts against an upper end surface of the sealing assembly.
  10. 10. The rigidity valve according to claim 9, wherein the connecting portion and the head portion are welded and fixed, a third step surface facing downward is provided on a wall of the inner hole portion of the connecting portion, an axial gap is provided between the third step surface and an upper end surface of the seal assembly, and an axial gap is provided between a lower end surface of the extending portion and an upper end surface of the seal assembly.

Description

Rigidity valve Technical Field The application relates to the technical field of valve devices, in particular to a rigidity valve. Background The suspension system of an automobile is closely related to safety, comfort, handling, and the like of the vehicle. To meet the requirements of high vehicle comfort and handling, air suspension systems are one of the directions of development of suspension systems. Air springs are key components in automotive air suspension systems that directly affect vehicle performance. The dual-cavity, three-cavity and other multi-cavity air springs have the advantages of being more applicable than single-cavity air springs because the rigidity is adjustable and the rigidity adjusting range is wide. The stiffness adjustment of the dual-cavity, three-cavity and other multi-cavity air springs depends on the stiffness valve. Taking a double-cavity air spring as an example, the communication relation between the main cavity and the auxiliary cavity can be controlled by opening and closing the rigidity valve, so that the rigidity of the double-cavity air spring is adjusted. The stiffness valve is closed, the main cavity and the auxiliary cavity of the double-cavity air spring are not communicated, the volume of the compressible gas is reduced, and the stiffness of the double-cavity air spring is increased. In the related art, the stiffness valve comprises an end socket, a valve seat, core iron, a mandrel and a sealing block, wherein the mandrel penetrates through the end socket and can axially move relative to the end socket, the upper end of the mandrel is relatively fixed with the core iron, and the lower end of the mandrel is relatively fixed with the sealing block. Through the excitation of the coil, the core iron can drive the sealing block to be abutted against or away from the valve opening of the valve seat through the mandrel, so that valve opening or closing actions are realized. The sealing structure is arranged between the sealing head and the valve seat, the outer peripheral surface of the sealing block is matched with the inner peripheral surface of the sealing structure, sealing is not needed between the sealing block and the sealing structure in the valve opening state of the sealing block far away from the valve opening, and the sealing block is sealed between the sealing block and the sealing structure in the valve closing state of the sealing block abutting the valve opening. The sealing structure comprises a supporting piece and a sealing piece integrally formed on the supporting piece, wherein two annular convex parts protruding inwards are arranged on the inner hole wall of the sealing piece in the axial direction, the sealing block is provided with two large-diameter parts and two small-diameter parts, the large-diameter parts and the small-diameter parts are alternately arranged in the axial direction, when the sealing block is in a valve opening position, the two annular convex parts of the sealing piece correspond to the positions of the two small-diameter parts of the sealing block respectively, and when the sealing block is in a valve closing position, the two annular convex parts of the sealing piece are matched with the two large-diameter parts of the sealing block respectively, and sealing is formed through extrusion deformation of the annular convex parts and pressure acting on the annular convex parts. The sealing structure and the sealing block are matched in a sealing way through the extrusion of the two annular convex parts when the sealing block axially moves, the dynamic friction force between the annular convex parts and the sealing block is large in the initial stage of the switching valve, the driving force required for closing the valve is large, the response speed of opening the valve is slow, and in addition, pressure exists in a cavity formed between the two annular convex parts and the sealing block, and the annular convex parts can be extruded to cause internal leakage when the pressure is too large. Disclosure of Invention The application aims to provide a rigidity valve which can reduce valve closing driving force and improve valve opening response speed through optimizing a related sealing structure. In order to solve the technical problems, the application provides a rigid valve, which comprises a valve seat, a valve block and a sealing assembly, wherein the sealing assembly is in limiting connection with the valve seat in the axial direction, the valve block is inserted into the sealing assembly, and the valve block can move relative to the sealing assembly in the axial direction so as to close or open a valve opening of the valve seat; The valve block comprises a large-diameter part and a small-diameter part, the large-diameter part is positioned above the small-diameter part, and a first downward step surface is formed at the joint of the large-diameter part and the small-diameter part; The sealing assembly is provided with an inse