Anti-deformation composite gasket for new energy thermal management system

Abstract

The invention relates to the technical field of composite gaskets, in particular to an anti-deformation composite gasket for a new energy thermal management system, which comprises a metal gasket and a rubber body, the metal gasket is integrally in a circular ring shape and is divided into an outer circular ring body and an inner ring belt, and the inner ring belt is positioned on the inner ring of the metal gasket and is thinner than the outer circular ring body; more than three grooves which are uniformly and equally divided are formed in the circumference of the inner ring of the metal gasket, and the rubber body is vulcanized on the inner edge of the metal gasket, is higher than the outer circular ring body towards the two sides in the thickness direction and wraps the outer circular ring body. The design that the rubber body wraps the outer circular ring body guarantees that the rubber body and the metal gasket are tightly combined, the sealing effect of the composite gasket in an automobile air conditioner pipeline system is greatly improved through the improvements, air conditioner refrigerant leakage is prevented, meanwhile, vibration in the automobile running process is absorbed, and noise generated by vibration is reduced.

Description

Technical Field

[0001] This invention relates to the field of composite gaskets, and more specifically to a deformation-resistant composite gasket for a new energy thermal management system. Background Technology

[0002] The thermal management system for new energy vehicles is a core device used to regulate the temperature of various vehicle components. It consists of components such as an electric compressor, condenser, and controller, and is applied to battery management, engine cooling, and air conditioning systems. Currently, in automotive air conditioning piping systems, composite gaskets made of rubber and vulcanized metal are commonly used for sealing pipe joints in the compressor. Figure 10 As shown, it is installed at the sealing surface of the pipe joint. Through the coordinated action of the mounting components above and below it, the rubber is compressed in the axial direction of the pipe to achieve a sealing effect. The height after compression is approximately the thickness of the metal gasket. The rubber body in the composite gasket utilizes its own elasticity to fill the microscopic unevenness of the surface at the pipe joint, preventing air conditioning refrigerant leakage. At the same time, it absorbs vibrations during vehicle operation, preventing the joint from loosening or wearing due to vibration, and reducing noise caused by vibration.

[0003] Existing composite washers consist of a metal gasket and a rubber body. The metal gasket is divided into an outer ring and an inner ring band, with the inner ring band being thinner than the outer ring. The upper and lower surfaces of the inner ring band are vulcanized with rubber. To ensure a firm bond between the rubber body and the inner ring band, the applicant has created uniformly spaced rectangular or trapezoidal openings on the inner circumference of the metal gasket, forming a toothed structure for the inner ring band. However, in actual use, the fixing effect of the rubber body embedded in these openings is not good, and twisting and dislocation are likely to occur. Later, the applicant attempted to develop a composite washer with holes drilled on the inner circumference of the metal gasket. However, the holes only provide localized point-to-point fixation and lack radial continuity constraint. When the rubber is subjected to pressure, vibration, or assembly force, it will still shift and twist along the circumferential direction. Stress concentration is likely to occur at the edge of the holes, which may lead to cracks or even breakage after long-term use. Furthermore, the rubber body and the gasket of composite washers on the market have the same thickness at the connection. This design lacks the protection and buffering effect of the rubber body on the outer ring. The connection between the rubber body and the metal gasket is prone to wear and aging, and long-term use can easily lead to problems such as cracking and falling off. Summary of the Invention

[0004] To address the problems of unstable rubber body fixation, easy wear, deformation, and displacement in composite gaskets, this invention proposes a deformation-resistant composite gasket for new energy thermal management systems. The technical solution adopted by this invention to solve its technical problem is: a deformation-resistant composite gasket for new energy thermal management systems, comprising: A metal gasket, the metal gasket being generally annular in shape, comprising an outer ring body and an inner ring band, the inner ring band being located within the inner circle of the metal gasket, the thickness of the inner ring band being less than the thickness of the outer ring body, the inner circumference of the inner ring band having three or more evenly distributed grooves along the radial direction, the grooves being triangular in shape gradually widening from the inside to the outside along the radial direction, the groove opening width being 1 / 3 to 1 / 8 of the groove bottom width; A rubber body is located in the inner ring of the metal gasket, and the inner ring is completely covered. The rubber body is higher than the two sides of the outer ring in the thickness direction. The rubber body and the metal gasket are vulcanized and bonded together.

[0005] Furthermore, the bottom of the groove is located on the outer ring body, and the groove extends from the inner ring to the outer ring body in the radial direction to form an outer groove, which penetrates the outer ring body in the thickness direction of the metal gasket.

[0006] Furthermore, the sidewall of the groove includes, from the groove opening to the groove bottom, a constant diameter section, an upper chamfer section, an expanded diameter section, and a lower chamfer section. The constant diameter section is a narrow slit with equal width at the top and bottom. The upper chamfer section is connected to the constant diameter section and forms an "eight"-shaped arc channel that widens from narrow to wide. The expanded diameter section extends outward from the upper chamfer section and connects to the lower chamfer section. The lower chamfer section is an "eight"-shaped channel that widens from narrow to wide in the radial direction and is directly connected to the groove bottom.

[0007] Furthermore, the length of the equal-diameter section is 0.65 times the width of the slot.

[0008] Furthermore, the rubber body covers the upper and lower surfaces of the outer ring body. The portion of the rubber body covering the upper surface of the outer ring body forms an upper outer extension, and the portion covering the lower surface forms a lower outer extension. The covered area extends 0.35±0.1mm from the bottom of the groove to the outer circumference of the outer ring body.

[0009] Furthermore, the distance between the bottom of the groove and the inner diameter of the outer ring is 0.15±0.1mm.

[0010] The beneficial effects of this invention are: The triangular grooves on the inner ring provide a reliable mechanical interlocking structure for the vulcanization of the rubber body, significantly increasing the contact area between the two. The triangular grooves gradually widen from the inside to the outside in the radial direction, so that the vulcanized rubber is embedded in the grooves to form an inverted locking fixation. When the rubber is subjected to compression, vibration or assembly force, the rubber in the grooves will generate reverse tensile and thrust forces, restricting the deformation and displacement of the rubber body. The rubber body is thicker than the outer ring and covers specific areas on the upper and lower surfaces of the outer ring. This not only inhibits cracking at the joint caused by aging or displacement of the rubber body, but also avoids excessive tearing of burrs during vulcanization. Furthermore, when external force is applied to the rubber body, the upper and lower outer extensions can prevent the rubber body from twisting. The groove design that extends through the outer ring further strengthens the mechanical interlocking strength between the rubber and the metal, reduces the risk of rubber detachment caused by long-term vibration and temperature changes, and extends the service life of the composite gasket.

[0011] The sidewall of the groove adopts a multi-segment arc-shaped structure of "equal diameter section + upper chamfer section + expanded diameter section + lower chamfer section" to disperse the stress concentration at the edge of the groove, suppress the problem of cracks and fractures easily generated at the edge of the hole, and avoid the problem of the groove sharp corners scratching the rubber body.

[0012] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a top view of the metal gasket; Figure 2 This is a three-dimensional schematic diagram of a metal gasket; Figure 3 This is a longitudinal section view of the metal gasket; Figure 4 This is a magnified view of a portion of the groove; Figure 5 This is a top view of a composite washer; Figure 6 This is a three-dimensional schematic diagram of a composite gasket; Figure 7 This is a front view of a composite gasket; Figure 8 This is a magnified view of the upper and lower extension regions. Figure 9 This is a longitudinal section view of the composite washer; Figure 10 It is a longitudinal section view of the assembly of the composite gasket and the pipe fitting; In the picture: 1. Metal gasket; 11. Outer ring; 12. Inner ring band; 121. Groove; 1211a, constant diameter section; 1211b, upper chamfer section; 1211c, expanded diameter section; 1211d, lower chamfer section; 2. Rubber body; 21. Upper extension portion; 22. Lower extension portion; 3. Male connector block; 4. Female connector block; 5. Bolt. Detailed Implementation

[0015] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and the orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be limiting, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0016] A deformation-resistant composite gasket for a new energy thermal management system includes a metal gasket 1 and a rubber body 2. A metal gasket 1 is generally annular in shape, comprising an outer ring body 11 and an inner ring band 12. The inner ring band 12 is located within the inner circle of the metal gasket 1, and its thickness is less than that of the outer ring body 11, approximately 0.2 to 0.6 times the thickness of the metal gasket 1. The inner ring band 12 has three or more evenly distributed grooves 121 along its inner circumference in the radial direction. Each groove 121 is a triangular-like groove that gradually widens from the inside to the outside in the radial direction, with the groove opening width being 1 / 3 to 1 / 8 of the groove bottom width. The metal gasket 1 can be made of aluminum, copper, iron, or a metal composite material thereof. The grooves 121 on the inner circumference are vulcanized rubber body 2. The process provides a mechanical interlocking structure, allowing the rubber to embed into the groove 121 during vulcanization. The triangular groove 121 ensures a tight interlock between the rubber and the metal, significantly increasing the contact area between the rubber and the metal gasket 1. When the rubber is deformed by compression during assembly, the rubber portion stuck in the groove 121 will generate tensile or pushing forces, limiting the deformation and displacement of the rubber. The inner ring band 12 is in direct contact with the rubber body 2. Its thinner thickness reduces its own rigidity, preventing uneven pressure on the rubber body 2 due to excessive thickness of the inner ring band 12. At the same time, it allows the inner ring band 12 to make appropriate concessions with the elastic deformation of the rubber, maximizing the function of the composite gasket with minimal usage and lowest cost.

[0017] Rubber body 2, such as Figure 6 , Figure 7 and Figure 8As shown, the rubber body 2 is located in the inner ring of the metal gasket 1, and the inner ring band 12 is completely covered. The rubber body 2 is higher than both sides of the outer ring body 11 in the thickness direction. The rubber body 2 and the metal gasket 1 are vulcanized and bonded together. The rubber body 2 covers the upper and lower surfaces of the outer ring body 11. The part of the rubber body 2 covering the upper surface of the outer ring body 11 forms an upper outer extension 21, and the part of the rubber body 2 covering the lower surface forms a lower outer extension 22. The covered area extends from the bottom of the groove to the outer circumference of the outer ring body 11 by 0.35±0.1mm. This structure is beneficial to suppress the rubber body 2 from aging or displacement, prevent it from cracking at the joint with the metal gasket 1, avoid the problem of excessive tearing of burrs during vulcanization, and prevent the rubber body from twisting when external force is applied to the rubber body 2.

[0018] In some examples, such as Figure 5 and Figure 9 As shown, the bottom of the groove 121 is located on the outer ring body 11. The groove 121 extends from the inner ring band 12 to the outer ring body 11 in the radial direction to form an outer groove. The outer groove penetrates the outer ring body 11 in the thickness direction of the metal gasket 1.

[0019] In some examples, such as Figure 4 As shown, the sidewall of the groove 121 includes, from the groove opening to the groove bottom, a constant diameter section 1211a, an upper chamfered section 1211b, an expanded diameter section 1211c, and a lower chamfered section 1211d. The constant diameter section 1211a is a narrow slit with equal width at the top and bottom. The inner end of the constant diameter section is the groove opening. The upper chamfered section 1211b is connected to the constant diameter section 1211a and is an "eight"-shaped arc channel that widens from narrow to wide. The expanded diameter section 1211c extends outward from the upper chamfered section 1211b and connects to the lower chamfered section 1211d. The lower chamfered section 1211d is an "eight"-shaped channel that widens radially and directly connects to the groove bottom. The length of the constant diameter section 1211a is 0.65 times the width of the groove opening. The distance between the groove bottom and the inner diameter of the outer ring 11 is 0.15±0.1mm. This multi-segment arc-shaped structure, consisting of "equal diameter section + upper chamfer section + expanded diameter section + lower chamfer section," disperses stress concentration at the edge of the groove, suppresses the problem of cracks and fractures easily occurring at the edge of the groove, and prevents the sharp corners of the groove from scratching the rubber body.

[0020] The working principle of the anti-deformation composite gasket used in the new energy thermal management system in the above embodiments is as follows: Currently, in fields such as automotive air conditioning piping systems, composite gaskets made of rubber and metal vulcanized together are commonly used for sealing pipe joints, such as... Figure 10As shown, it is installed at the sealing joint surface between the male connector block 3 and the female connector block 4 of the air conditioning pipe. By applying torque to the bolt 5 and nut on the side, the male connector block 3 and the female connector block 4 work together to generate a force that compresses the rubber body 2 in the axial direction of the pipe, causing it to elastically deform and compress to a height approximately the thickness of the metal gasket 1. The rubber body 2 utilizes its high elasticity to actively fill the microscopic unevenness on the surface of the pipe joint, forming a sealing interface and playing a sealing role. This prevents air conditioning refrigerant leakage and absorbs vibrations during vehicle operation, preventing the joint from loosening or wearing due to vibration and reducing noise caused by vibration.

[0021] The composite gasket includes a metal gasket 1 and a rubber body 2. The metal gasket 1 includes an outer ring 11 and an inner ring band 12. The triangular groove 121 on the inner ring band 12 provides a reliable mechanical interlocking structure for the vulcanization of the rubber body 2, greatly increasing the contact area between the two. The triangular groove 121 gradually widens from the inside to the outside in the radial direction, so that the vulcanized rubber is embedded in the groove 121 to form an inverted locking fixation. When the rubber is subjected to compression, vibration or assembly force, the rubber in the groove 121 will generate reverse tension and thrust, which restricts the deformation and displacement of the rubber body 2.

[0022] The sidewall of the groove 121 adopts a multi-segment arc-shaped structure of "equal diameter section 1211a + upper chamfer section 1211b + expanded diameter section 1211c + lower chamfer section 1211d" to disperse the stress concentration at the edge of the groove 121, suppress the problem of cracks and fractures easily generated at the edge of the hole, and avoid the problem of the sharp corner of the groove 121 scratching the rubber body 2.

[0023] The rubber body 2 is thicker than the outer ring body 11 and covers specific areas on the upper and lower surfaces of the outer ring body 11. This not only inhibits cracking at the joint caused by aging or displacement of the rubber body 2, but also avoids excessive tearing of burrs during vulcanization. Furthermore, when external force is applied to the rubber body 2, the upper outer extension 21 and the lower outer extension 22 can prevent the rubber body 2 from twisting. The design of the groove 121 penetrating into the outer ring body 11 further strengthens the mechanical interlocking strength between the rubber and the metal, reduces the risk of rubber detachment caused by long-term vibration and temperature changes, and extends the service life of the composite gasket.

[0024] The above description, based on the preferred embodiments of the present invention, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A deformation-resistant composite gasket for a new energy thermal management system, characterized in that: include: Metal gasket (1), the metal gasket (1) is in the shape of a ring, including an outer ring body (11) and an inner ring band (12). The inner ring band (12) is located in the inner circle of the metal gasket (1). The thickness of the inner ring band (12) is less than the thickness of the outer ring body (11). The inner circumference of the inner ring band (12) is provided with three or more evenly distributed grooves (121) in the radial direction. The grooves (121) are triangular in shape that gradually widens from the inside to the outside in the radial direction. The width of the groove opening is 1 / 3 to 1 / 8 of the width of the groove bottom. The rubber body (2) is located in the inner ring of the metal gasket (1), and the inner ring band (12) is completely covered. The rubber body (2) is higher than the outer ring body (11) on both sides in the thickness direction. The rubber body (2) and the metal gasket (1) are vulcanized and combined into one.

2. The anti-deformation composite gasket for a new energy thermal management system according to claim 1, characterized in that: The bottom of the groove (121) is located on the outer ring body (11). The groove (121) extends from the inner ring band (12) to the outer ring body (11) in the radial direction to form an outer groove. The outer groove penetrates the outer ring body (11) in the thickness direction of the metal gasket (1).

3. The anti-deformation composite gasket for a new energy thermal management system according to claim 1, characterized in that: The sidewall of the groove (121) includes, from the groove opening to the bottom of the groove, a constant diameter section (1211a), an upper chamfered section (1211b), an expanded diameter section (1211c), and a lower chamfered section (1211d). The constant diameter section (1211a) is a narrow slit with equal width at the top and bottom. The upper chamfered section (1211b) is connected to the constant diameter section (1211a) and is an arc-shaped channel that widens from narrow to wide. The expanded diameter section (1211c) extends outward from the upper chamfered section (1211b) and connects to the lower chamfered section (1211d). The lower chamfered section (1211d) is an arc-shaped channel that widens from narrow to wide in the radial direction and is directly connected to the bottom of the groove.

4. The anti-deformation composite gasket for a new energy thermal management system according to claim 3, characterized in that: The length of the equal diameter section (1211a) is 0.65 times the width of the slot.

5. The anti-deformation composite gasket for a new energy thermal management system according to claim 1, characterized in that: The rubber body (2) covers the upper and lower surfaces of the outer ring body (11). The portion of the rubber body (2) covering the upper surface of the outer ring body (11) forms an upper extension (21), and the portion of the rubber body (2) covering the lower surface forms a lower extension (22). The covered area extends 0.35±0.1mm from the bottom of the groove to the outer circumference of the outer ring body (11).

6. The anti-deformation composite gasket for a new energy thermal management system according to claim 1, characterized in that: The distance between the bottom of the groove and the inner diameter of the outer ring (11) is 0.15±0.1mm.

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