CN220268504U

CN220268504U - Valve and thermal management system for vehicle

Info

Publication number: CN220268504U
Application number: CN202321552467.8U
Authority: CN
Inventors: 李勇; 周绘蓝; 刘鑫; 张岳林
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2023-06-16
Filing date: 2023-06-16
Publication date: 2023-12-29
Anticipated expiration: 2033-06-16

Abstract

The application provides a valve and a thermal management system for a vehicle. In the valve, a housing, a valve core and a gasket are assembled together. The housing is formed with a valve cavity, and the valve core is at least partially received in the valve cavity and can rotate relative to the valve core, so that the interface part of the housing realizes different communication logics. Further, a gasket is received in the valve chamber and is stationary relative to the housing, the gasket forming an outer sealing lip on an outer surface thereof and an inner sealing lip on an inner surface thereof. The outer seal lip projects toward and abuts against the housing to achieve a contact seal, and the inner seal lip projects toward and abuts against the spool to achieve a contact seal, wherein the outer seal lip and the inner seal lip are arranged in pairs in a radial direction of the gasket. In this way, the friction between the valve core and the sealing gasket is greatly reduced in the process of rotating relative to the shell and the sealing gasket, and the sealing performance between the sealing gasket and the shell and the valve core is improved.

Description

Valve and thermal management system for vehicle

Technical Field

The present application relates to the field of thermal management of vehicles, and in particular to a valve and a thermal management system for a vehicle including the same.

Background

In the prior art, valves (such as plug valves) can be used to control the on-off and flow of fluids in different systems, for example, chinese patent publication No. CN 218440701U, entitled "a metal-clad sealing ring and combined sealing pair plug valve" discloses one such plug valve. Moreover, such valves are also often used in thermal management systems for vehicles. In conventional valves, a housing, a spool, and a gasket are included. A columnar valve cavity for accommodating the columnar valve core and the sealing gasket is formed in the shell. In the process of rotating the columnar valve core relative to the shell, different communication logics are realized at the interface part of the shell, and the flow of the interface part can be controlled as required. The sealing gasket is formed into a cylindrical shape and is arranged between the shell and the columnar valve core, and the sealing gasket is fixed relative to the shell and is used for sealing between the shell and the columnar valve core.

However, the surface contact seal is realized between the whole inner surface of the sealing gasket facing the columnar valve core and the columnar valve core, and the surface contact seal can cause larger friction force between the sealing gasket and the columnar valve core in the rotation process of the columnar valve core, so that larger friction torque is generated. In addition, because the area of the sealing gasket for realizing contact sealing with the columnar valve core is larger, the contact pressure between the sealing gasket and the columnar valve core is possibly insufficient and unstable, and the contact position between the sealing gasket and the columnar valve core is uncertain and not tightly contacted with each other in the working process of the columnar valve core, so that the sealing performance between the sealing gasket and the columnar valve core is adversely affected.

Disclosure of Invention

The present application has been made based on the above-described drawbacks of the prior art. An object of the present application is to provide a novel valve capable of improving sealing performance between a valve body and a gasket while reducing friction between the valve body and the gasket during rotation. It is another object of the present application to provide a thermal management system for a vehicle including the valve described above.

In order to achieve the above object, the present application adopts the following technical solutions.

The present application provides a valve comprising:

a housing formed with a valve chamber and a plurality of interface portions;

a valve cartridge at least partially received within the valve cavity, the plurality of interface portions being selectively communicable during rotation of the valve cartridge relative to the housing; and

a gasket fixedly located between the spool and the housing with respect to the housing, the gasket being formed with an outer seal lip on an outer surface thereof, the outer seal lip protruding toward the housing and abutting against the housing to effect a contact seal, the gasket being formed with an inner seal lip on an inner surface thereof, the inner seal lip protruding toward the spool and abutting against the spool to effect a contact seal, wherein the outer seal lip and the inner seal lip are arranged in pairs in a radial direction of the gasket.

In one alternative, the gasket is formed with a gasket through hole communicating with the interface portion, the gasket through hole having an outer opening on the outer surface and an inner opening on the inner surface,

the outer sealing lips are configured to be disposed continuously around each of the outer openings, and the inner sealing lips are configured to be disposed continuously around each of the inner openings.

In another alternative, the protruding height of the outer sealing lip is greater than the protruding height of the inner sealing lip.

In another alternative, the outer seal lip arrangement pattern shape and the inner seal lip arrangement pattern shape are identical.

In another alternative, the gasket is formed in a cylindrical shape, the outer seal lip includes an outer circumferential lip extending along a circumferential direction of the gasket and an outer axial lip extending along an axial direction of the gasket, the outer axial lip intersecting or being connected with the outer circumferential lip such that a plurality of spaced apart regions are divided on the outer surface by the outer seal lip, and the inner seal lip includes an inner circumferential lip disposed corresponding to the outer circumferential lip and an inner axial lip disposed corresponding to the outer axial lip.

In another alternative, at least a portion of the outer axial lip extends continuously along the axial direction for the entire axial length of the gasket; and/or

At least a portion of the inner axial lip extends continuously along the axial direction over the entire axial length of the gasket.

In another alternative, the gasket is formed with an opening extending in the axial direction, and the housing is formed with a projection projecting toward the valve chamber, the projection being located in the opening in a state in which the gasket is mounted to the housing so that the gasket is immobilized with respect to the housing.

In another alternative, the gasket includes a main body portion and a wear portion that is arranged in a layered manner with the main body portion, and that covers at least a portion of the gasket where the inner seal lip is formed and abuts the spool.

In another alternative, the body portion is made of rubber and the wear portion is made of polytetrafluoroethylene.

The application also provides a vehicle thermal management system which comprises the valve according to any one of the technical schemes.

By adopting the technical scheme, the application provides the valve and the vehicle thermal management system comprising the valve. In the valve of the present application, a housing, a valve core and a gasket are included that are assembled together. The housing is formed with a valve cavity, and the valve core is at least partially received in the valve cavity and can rotate relative to the valve core, so that the interface part of the housing realizes different communication logics. Further, a gasket is received in the valve chamber and is stationary relative to the housing, the gasket forming an outer sealing lip on an outer surface thereof and an inner sealing lip on an inner surface thereof. The outer seal lip projects toward and abuts against the housing to achieve a contact seal, and the inner seal lip projects toward and abuts against the spool to achieve a contact seal, wherein the outer seal lip and the inner seal lip are arranged in pairs in a radial direction of the gasket.

In this way, due to the fact that the so-called line contact seal is achieved between the inner sealing lip of the gasket and the valve core, the contact area between the gasket and the valve core in the present application is greatly reduced compared to the case where the surface contact seal is achieved between the entire inner surface and the valve core, so that the friction force between the valve core and the gasket during rotation of the valve core relative to the housing and the gasket is greatly reduced. In addition, since the outer seal lip and the inner seal lip are formed in a convex shape and are arranged in pairs, it is advantageous to concentrate the contact pressure at the portion where the outer seal lip contacts the housing and the portion where the inner seal lip contacts the valve spool, and further to make the contact pressure at the contact portion between the gasket and the housing and the valve spool sufficient and stable, thereby improving the sealing performance between the gasket and the housing and the valve spool.

Drawings

Fig. 1 is a schematic diagram showing an exploded structure of a valve according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view showing the valve in fig. 1.

Fig. 3 is an enlarged schematic view showing a region M in fig. 2.

Description of the reference numerals

1, a shell; 11 a housing body; 11c valve cavity; 12 covers;

2, a valve core; a 21 spool body; 21h valve core through holes; 22 transmission rods;

3, a sealing gasket; 3s1 outer surface; 3s2 inner surface; 3h pad through holes; 3p1 outer opening; 3p2 inner opening; 31 a main body portion; 32 wear parts; 33 an outer sealing lip; 331 an outer circumferential lip; 332 an outer axial lip; 34 an inner sealing lip; 341 an inner circumferential lip; 342 an inner axial lip;

aaxial direction; r is radial.

Detailed Description

Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are merely illustrative of how one skilled in the art may practice the present application and are not intended to be exhaustive of all of the possible ways of practicing the present application nor to limit the scope of the present application.

In the present application, "circumferential", "axial" and "radial" refer to the circumferential, axial and radial directions of the cylindrical gasket, respectively.

Hereinafter, a structure of a valve according to an embodiment of the present application will be described with reference to the drawings.

As shown in fig. 1 and 2, a valve according to an embodiment of the present application includes a housing 1, a valve core 2, and a gasket 3 assembled together.

In the present embodiment, as shown in fig. 1 and 2, the housing 1 includes a housing main body 11, a cover 12, and a plurality of interface portions, and the housing main body 11 and the cover 12 are fixedly connected together by a plurality of screw connectors so as to enclose a valve chamber 11c formed in a cylindrical shape. A plurality of interface portions are formed integrally with the housing main body 11, each interface portion being formed with a passage communicating with the valve chamber 11c, different interface portions being arranged spaced apart from each other and passages in different interface portions being able to selectively communicate during rotation of the spool 2 relative to the housing 1.

In the present embodiment, as shown in fig. 1 and 2, a part of the valve spool 2 is housed in the valve chamber 11c, and another part of the valve spool 2 protrudes from the valve chamber 11c. Specifically, the spool 2 includes a spool body 21 and a transmission rod 22 fixed to each other. The valve body 21 is formed in a cylindrical shape, and the valve body 21 is housed in the valve chamber 11c of the housing 1. The side wall of the spool body 21 is formed with spool through holes 21h having a predetermined size and shape, and these spool through holes 21h can selectively communicate with passages in the interface portion of the housing 1 during rotation of the spool body 21 relative to the housing 1. In this way, during rotation of the valve body 2 relative to the housing 1, the passages of the plurality of interface portions of the housing 1 can be selectively communicated via the valve body through-hole 21h, thereby realizing different communication logics. Further, the transmission rod 22 is fixedly connected with the valve core main body 21 in a coaxial manner, the transmission rod 22 extends out of the valve cavity 11c, and an external spline is formed at the end of the transmission rod 22 far away from the valve core main body 21, so that the transmission rod 22 can be in spline fit with an external power source (such as a motor), and the transmission rod 22 is driven by the power source to drive the valve core 2 to rotate.

In the present embodiment, as shown in fig. 1 to 3, the gasket 3 is housed in the valve chamber 11c of the housing 1 and is fixed relative to the housing 1, and the gasket 3 is located between the housing 1 and the valve spool 2 for achieving a contact seal between the housing 1 and the valve spool 2. The gasket 3 may be fixed to the housing 1 by means of a snap fit or adhesive. Cooperating with a valve chamber 11c formed in a cylindrical shape. The gasket 3 is formed in a cylindrical shape, and the gasket 3 may be formed with a strip-shaped opening (strip slit) extending over the entire axial length along the axial direction a, which may penetrate the gasket 3 in the radial direction R, so that the gasket 3 is formed in a shape broken at the strip-shaped opening. In a state in which the gasket 3 is mounted inside the housing 1, the strip-shaped opening formed by the gasket 3 may be shape-fitted with a strip-shaped protrusion formed by the inner wall of the housing 1 protruding toward the valve chamber 11c so that the strip-shaped protrusion can be inserted into the strip-shaped opening, thereby restricting the gasket 3 and making the gasket 3 stationary with respect to the housing 1. Further, after the gasket 3 is mounted inside the housing 1, the valve body 2 may be mounted inside an assembly of both the housing 1 and the gasket 3 such that an outer seal lip 33 of the gasket 3, described below, is compressed.

Further, as shown in fig. 1 and 2, the outer surface 3s1 of the gasket 3 is the outer peripheral surface of the gasket 3 facing the housing 1, that is, the outer side surface of the gasket 3 in the radial direction R. The gasket 3 is formed with an outer seal lip 33 on an outer surface 3s1 thereof, the outer seal lip 33 protruding toward the housing 1 and abutting against the housing 1 to achieve a contact seal. Further, the outer seal lip 33 includes an outer circumferential lip 331 and an outer axial lip 332, the outer circumferential lip 331 extending continuously over the entire circumference along the circumferential direction of the gasket 3, and a portion of the outer axial lip 332 extending continuously over the entire axial length along the axial direction a of the gasket 3. The outer circumferential lip 331 and the outer axial lip 332 intersect each other such that a plurality of spaced apart areas are defined on the outer surface 3s1 by the outer seal lip 33, and the outer opening 3p1 of the pad through hole 3h can be formed in these areas.

Further, as shown in fig. 1 and 2, the inner surface 3s2 of the gasket 3 is the inner peripheral surface of the gasket 3 facing the valve body 2, that is, the inner side surface of the gasket 3 in the radial direction R. The gasket 3 is formed with an inner seal lip 34 on an inner surface 3s2 thereof, the inner seal lip 34 protruding toward the valve spool 2 and abutting against the valve spool 2 to achieve a contact seal. Further, the inner seal lip 34 includes an inner circumferential lip 341 and an inner circumferential lip 342, the inner circumferential lip 341 extending continuously over the entire circumference along the circumferential direction of the gasket 3, and a portion of the inner circumferential lip 342 extending continuously over the entire axial length along the axial direction a of the gasket 3. The inner circumferential lip 341 and the inner axial lip 342 intersect each other so that an inner opening 3p2 of the gasket through hole 3h can be formed in a plurality of spaced apart areas on the inner surface 3s2 by the inner seal lip 34.

Further, as shown in fig. 1 and 2, the gasket 3 is formed with a gasket through hole 3h communicating with the passage of the interface portion. The number of pad through holes 3h may be the same as the number of interface portions, and the size of the pad through holes 3h may be matched with the size of the channels of the interface portions, and the pad through holes 3h and the corresponding interface portions are always communicated. Further, the gasket through hole 3h forms an outer opening 3p1 on the outer surface 3s1 of the gasket 3 and an inner opening 3p2 on the inner surface 3s2 of the gasket 3, the outer seal lip 33 is configured to be continuously arranged around each outer opening 3p1, and the inner seal lip 34 is configured to be continuously arranged around each inner opening 3p2. That is, the periphery of each outer opening 3p1 and each inner opening 3p2 is surrounded by the seal lips 33, 34, whereby the seal lips can achieve a desired sealing action in the case where the valve body through hole 21h of the valve body 2 communicates with the passage of the interface portion via the pad through hole 3h. In addition to this, in order to enable the opening degree of the inner opening 3p2 to be adjustable in terms of rotation of the spool 2 to control the flow rate, the inner seal lip 34 may be configured to be provided in a so-called proportional region in cooperation with the adjustment of the opening degree of the inner opening 3p2 to perform a corresponding sealing function, whereby the control of the opening degree of the inner opening 3p2 can be achieved.

Further, as shown in fig. 1 to 3, the outer seal lip 33 and the inner seal lip 34 are arranged in pairs in the radial direction R such that the arrangement pattern shape of the outer seal lip 33 and the arrangement pattern shape of the inner seal lip 34 are identical. Specifically, the outer circumferential lip 331 and the outer axial lip 332 of the outer seal lip 33 each extend and intersect each other during extension such that the outer seal lip 33 forms a specific pattern shape. The inner circumferential lip 341 and the inner axial lip 342 of the inner seal lip 34 each extend and intersect each other during the extension so that the inner seal lip 34 also forms a specific pattern shape. In the case where the gasket 3 is deployed in the circumferential direction, the pattern shape of the outer seal lip 33 is the same as the pattern shape of the inner seal lip 34, wherein the arrangement position of the outer circumferential lip 331 is the same as the arrangement position of the inner circumferential lip 341, and the arrangement position of the outer axial lip 332 is the same as the arrangement position of the inner axial lip 342. Further, in the case where the gasket 3 is spread in the circumferential direction, the length of the outer circumferential lip 331 and the length of the inner circumferential lip 341 may be equal, and the width of the outer circumferential lip 331 and the width of the inner circumferential lip 341 may be unequal; the length of the outer axial lip 332 and the length of the inner axial lip 342 may be equal, and the width of the outer axial lip 332 and the width of the inner axial lip 342 may not be equal; the height of the outer circumferential lip 331 may be greater than the height of the inner circumferential lip 341, and the height of the outer axial lip 332 may be greater than the height of the inner axial lip 342, such that the height of the outer sealing lip 33 may be greater than the height of the inner sealing lip 34. The height of the outer seal lip 33 is the dimension that projects the most in the direction perpendicular to the outer surface 3s1, and the height of the inner seal lip 34 is the dimension that projects the most in the direction perpendicular to the inner surface 3s 2. In practice, the height of both the outer seal lip 33 and the inner seal lip 34 can be adjusted to accommodate the pressure within the valve chamber 11c. Further, the portion of the outer seal lip 33 for contact with the housing 1 is formed as a curved surface, and the portion of the inner seal lip 34 for contact with the valve spool 2 is formed as a curved surface.

Further, as shown in fig. 2 and 3, two outer axial lips 332 and two inner axial lips 342 are provided between the circumferentially adjacent pad through holes 3h, and two outer circumferential lips 331 and two inner circumferential lips 341 are provided between the axially adjacent pad through holes 3h. Thus, even if one layer of lips for sealing fails, the other layer of lips still functions, and such an arrangement is advantageous in ensuring sealing performance between the gasket 3 and the valve spool 2 and the housing 1.

Further, as shown in fig. 2 and 3, the gasket 3 includes a main body portion 31 and a wear-resistant portion 32. The wear-resistant portion 32 is arranged in lamination with the main body portion 31 in the thickness direction, and the wear-resistant portion 32 covers the entire inner surface 3s2 of the main body portion 31, whereby the wear-resistant portion 32 covers the portion of the gasket 3 where the inner seal lip 34 is formed, and the wear-resistant portion 32 will always be in contact with the valve spool 2. In the present embodiment, the body portion 31 may be made of rubber, the wear-resistant portion 32 may be made of polytetrafluoroethylene, and the body portion 31 and the wear-resistant portion 32 may be formed integrally by vulcanization molding.

In the present embodiment, as shown in fig. 1, bearings may also be provided between the spool 2 and the housing main body 11 and between the spool 2 and the cover 12, so that the spool 2 can be supported by both bearings. In the present embodiment, the gasket 3 may have a notch instead of a cylindrical shape extending over the entire circumference in the circumferential direction, but the present application is not limited thereto, and the gasket 3 may be formed in a cylindrical shape extending over the entire circumference in the circumferential direction.

The present application also provides a thermal management system for a vehicle including a flow control module including the valve described in the above embodiments, such that the flow control module can implement predetermined communication logic and flow control.

The foregoing has described the technical solution of the present application, but the present application is not limited to the above-described embodiments, and those skilled in the art can make various modifications to the above-described embodiments of the present application under the teachings of the present application without departing from the scope of the present application. The following supplementary explanation is further made.

i. In the above embodiment, the outer seal lip 33 including the outer circumferential lip 331 and the outer axial lip 332, and the inner seal lip 34 including the inner circumferential lip 341 and the inner axial lip 342 are described, but the present application is not limited thereto. The outer sealing lip 33 and the inner sealing lip 34 may take other pattern shapes as long as the sealing lips 33, 34 satisfy the sealing action which is arranged in pairs in the radial direction R and can achieve a certain operation mode of the valve. It will be appreciated that the pair arrangement of the outer seal lip 33 and the inner seal lip 34 in the radial direction R includes the case where the arrangement pattern shapes thereof are identical or slightly different (for example, the circumferential dimension of the outer circumferential lip 331 of the outer seal lip 33 may be slightly different from the inner circumferential lip 341 of the corresponding inner seal lip 34).

in the above embodiment, it was explained that the abrasion resistant portion 32 covers the entire inner surface 3s2 of the main body portion 31, but the present application is not limited thereto. The wear part 32 may cover only the portion of the gasket 3 where the inner seal lip 34 is formed.

it can be appreciated that by adopting the technical solution of the present application, the effective contact pressure between the gasket 3 and the housing 1 and the valve core 2 can be greatly increased, and the contact portions of the gasket 3 and the housing 1 and the valve core 2 are always at the portions where the sealing lips 33, 34 are located, and the contact pressure can be concentrated at the sealing lips 33, 34, thereby improving the sealing performance between the gasket 3 and the housing 1 and the valve core 2. In addition, since the so-called line contact seal is realized between the inner seal lip 34 and the valve element 2, the friction force between the inner seal lip 34 and the valve element 2 is greatly reduced during the rotation of the valve element 2, which is advantageous for the rotation of the valve element 2. Thereby, the service life of the valve can be improved.

it will be appreciated that the number of sealing lips between adjacent outer and inner openings 3p1, 3p2 may be provided as desired, may be two as in the specific embodiment described above, or may be only one or more than three. In addition, the extension shape and the size of the seal lip may be adjusted as needed, and are not limited to those described in the above embodiments.

Claims

1. A valve, comprising:

a housing formed with a valve chamber and a plurality of interface portions;

2. The valve according to claim 1, wherein the gasket is formed with a gasket through hole communicating with the interface portion, the gasket through hole having an outer opening on the outer surface and an inner opening on the inner surface,

3. The valve of claim 1, wherein the protruding height of the outer sealing lip is greater than the protruding height of the inner sealing lip.

4. A valve according to any one of claims 1 to 3, wherein the outer seal lip arrangement pattern shape and the inner seal lip arrangement pattern shape are identical.

5. The valve according to claim 4, wherein,

the gasket is formed in a cylindrical shape,

the outer seal lip includes an outer circumferential lip extending along a circumferential direction of the gasket and an outer axial lip extending along an axial direction of the gasket, the outer axial lip intersecting or being connected with the outer circumferential lip such that a plurality of spaced apart regions are divided on the outer surface by the outer seal lip, and the inner seal lip includes an inner circumferential lip disposed in correspondence with the outer circumferential lip and an inner axial lip disposed in correspondence with the outer axial lip.

6. A valve according to claim 5, wherein,

at least a portion of the outer axial lip extends continuously along the axial direction throughout the axial length of the gasket; and/or

7. The valve according to claim 5, wherein the gasket is formed with an opening extending in the axial direction, and the housing is formed with a projection projecting toward the valve chamber, the projection being located in the opening in a state in which the gasket is mounted to the housing so that the gasket is immobilized with respect to the housing.

8. A valve according to any one of claims 1 to 3, wherein the gasket includes a main body portion and a wear portion, the wear portion being arranged in a layered relation with the main body portion, and the wear portion covering at least a portion of the gasket where the inner seal lip is formed and abutting the spool.

9. The valve of claim 8, wherein the body portion is made of rubber and the wear portion is made of polytetrafluoroethylene.

10. A thermal management system for a vehicle, characterized by comprising the valve according to any one of claims 1 to 9.