Fluid control assembly and seal

Abstract

The fluid control assembly comprises a shell assembly and a valve element, the shell assembly is provided with a valve cavity, and at least part of the valve element is located in the valve cavity; the fluid control assembly further comprises a sealing piece, the sealing piece is arranged between the valve element and the shell assembly in a sealed mode, the sealing piece is provided with a hole channel, the shell assembly is provided with a valve port communicated with the valve cavity, and the hole channel corresponds to the valve port. The sealing piece comprises a sealing lip, the sealing lip comprises a first inner surface, the first inner surface limits part of the wall portion of the hole channel, the sealing lip abuts against the shell assembly, and the sealing lip is integrally annular and points to the direction corresponding to the valve port along the hole channel. At least part of the first inner surface extends in the direction away from the axis, and the projection of the wall part limiting the valve port is located in the projection of the hole channel wall limited by the axial end of the sealing lip. According to the fluid control assembly, the sealing performance can be improved.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, and more specifically to a fluid control component and seal for automotive and energy storage applications. Background Technology

[0002] Currently, rubber sealing rings are widely used in automotive thermal management system electronic water valves. These sealing rings function to prevent crossflow between different flow channels within the electronic water valve. With the rapid development of thermal management systems and the increasing complexity and diversity of customer systems, the hydraulic pressure requirements for the electronic water valve's internal cavity are becoming increasingly stringent. As hydraulic pressure increases, the risk of sealing ring leakage also increases. Summary of the Invention

[0003] The purpose of this application is to provide a fluid control component and a seal to improve the sealing performance of the fluid control component.

[0004] To achieve the above objectives, this application adopts the following technical solution: a fluid control assembly, including a housing assembly and a valve core, the housing assembly having a valve cavity, at least a portion of the valve core being located within the valve cavity; the fluid control assembly further includes a seal, the seal being sealed between the valve core and the housing assembly, the seal having a channel, the housing assembly having a valve port communicating with the valve cavity, the channel and the valve port corresponding to each other; the seal includes a sealing lip, the sealing lip including a first inner surface, the first inner surface defining a portion of the wall of the channel, the sealing lip abutting against the housing assembly, the sealing lip being generally annular, pointing along the channel in a direction corresponding to the valve port, at least a portion of the first inner surface extending in a direction away from the axis, and the projection of the wall defining the valve port being located within the projection of the channel wall defined by the axial end of the sealing lip.

[0005] The fluid control component provided in this application has a sealing channel corresponding to a valve port, and the projection of the valve port wall is located within the projection of the channel wall defined by the axial end of the sealing lip. Simultaneously, because the sealing lip includes a first inner surface, at least a portion of the first inner surface extends away from the axis along the direction from the channel to the corresponding valve port. When the valve cavity is filled with fluid, the fluid acts on the outer surface of the sealing component, compressing the sealing lip. The sealing lip is compressed towards the axis by the fluid pressure. Since at least a portion of the first inner surface extends away from the axis along the direction from the channel to the corresponding valve port, the angle between the compression direction of the sealing lip and the axis of the sealing component is acute. The fluid pressure does not act perpendicularly on the sealing lip. As the fluid pressure increases, the distance between the sealing lip and the housing assembly decreases, and the compression of the sealing lip increases, increasing the contact force between the sealing component and the housing assembly. This prevents fluid in the valve cavity from entering the valve port through the gap between the sealing lip and the housing assembly, thereby reducing the risk of leakage and improving sealing performance. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of a fluid control component.

[0007] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0008] Figure 3 This is a cross-sectional view of the fluid control assembly provided in an embodiment of this application;

[0009] Figure 4 yes Figure 3 A magnified view of a portion of the image;

[0010] Figure 5 yes Figure 3 A schematic diagram of the structure of the sealing element in the diagram;

[0011] Figure 6 yes Figure 5 Another structural diagram from another perspective;

[0012] Figure 7A yes Figure 5 A schematic diagram of the cross-section;

[0013] Figure 7B yes Figure 7A A magnified view of the area within the dashed frame;

[0014] Figure 8 yes Figure 3 A schematic diagram of a partial three-dimensional structure;

[0015] Figure 9 yes Figure 8 A magnified view of a portion of the image;

[0016] Figure 10 This is a schematic diagram comparing the sealing performance of the sealing element provided in the embodiments of this application and a comparative sealing element;

[0017] Figure 11 This is a structural schematic diagram of a comparative seal.

[0018] The annotations in the figure are explained as follows:

[0019] 1. Housing assembly; 10. Valve chamber; 11. Valve port; 2. Valve core; 21. Conducting chamber; 22. Sealing part; 3. Seal; 30. Channel; 312. First outer surface; 31. Sealing lip; 311. First inner surface; 36. Second inner surface; 39. Side surface; 37. First axial end; 38. Second axial end; 313. Root; 314. End; 32. Mounting part; 320. Liquid storage space; 300. First opening; 321. Elastic layer; 322. Skeleton layer; 33. Connecting rib. Detailed Implementation

[0020] As is known from the background art, as the hydraulic pressure increases, the risk of leakage in the fluid control components increases.

[0021] The following analysis uses a fluid control component as an example to explain why the risk of leakage in the fluid control component increases with increasing hydraulic pressure.

[0022] Please refer to Figures 1-2 A fluid control assembly includes components such as a valve housing 21, a valve core 22, a sealing ring 24, a reinforcing ring 25, and a cap 26. The valve core 22 is located within the valve cavity of the valve housing 21. Along the radial direction of the valve core 22, the sealing ring 24 is disposed between the valve core 22 and the valve housing 21. The sealing ring 24 has a spherical surface on one side near the valve core 22, with a diameter equivalent to that of the valve core 22. On the other side of the sealing ring 24 facing away from its spherical surface, there is an annular groove 242. The top surfaces of the outer and inner rings of the annular groove 242 perpendicularly abut against the inner wall of the valve housing 21 to form a contact seal. As the hydraulic pressure increases, the fluid exerts pressure on the sealing ring 24 in the direction indicated by the thick arrow (shown in...). Figure 2 Under the hydraulic pressure, the top surfaces of the outer and inner rings of the annular groove 242 of the sealing ring 24 are compressed and pressed against the valve body 21 to achieve a seal. As the hydraulic pressure increases, the hydraulic pressure acting on the outer surface of the sealing ring 24 may cause the inner ring of the annular groove 242 of the sealing ring 24 to move closer to the axis of the sealing ring 24, which reduces the contact force between the sealing ring 24 and the valve body 21 and increases the risk of leakage.

[0023] Please refer to Figures 3-8To reduce the risk of leakage in fluid control components, this application provides a fluid control component, including a housing assembly 1 and a valve core 2. The housing assembly 1 has a valve cavity 10, and at least a portion of the valve core 2 is located within the valve cavity 10. The fluid control component also includes a seal 3, which is sealed between the valve core 2 and the housing assembly 1. The seal 3 has a channel 30. The housing assembly 1 has a valve port 11 communicating with the valve cavity 10, and the channel 30 and the valve port 11 correspond to each other. The valve core 2 has a through cavity 21 and a blocking portion 22, which defines a portion of the wall of the through cavity 21. The through cavity 21 and the valve port 11 are connected through the channel 30 of the seal 3.

[0024] The seal 3 includes a sealing lip 31, which includes a first inner surface 311 that defines a portion of the wall of the channel 30. The sealing lip 31 is capable of abutting against the housing assembly 1. The sealing lip 31 is generally annular. The seal 3 includes an axial first end 37 and an axial second end 38. The axial first end 37 is closer to the valve core 2 than the axial second end 38 in the direction from the axial first end 37 to the axial second end 38. Figure 7A In the direction A), at least a portion of the first inner surface 311 extends in a direction away from the axis L (shown in FIG. 7) of the seal 3, and the projection of the wall portion defining the valve port 11 is located within the projection of the wall of the orifice 30 of the axial second end 38. The sealing lip 31 is generally annular, meaning that the sealing lip 31 is generally closed in the circumferential direction, and can be annular, conical, square, irregular, etc., as long as it is a closed shape.

[0025] In the direction A along the first end 37 to the second end 38 of the axial direction, at least part of the first inner surface 311 extends in a direction away from the axis L. This means that the first inner surface 311 of the sealing lip 31 and the axis L are inclined as a whole. The first inner surface 311 can be a plane, an arc surface or a wave surface, as long as the first inner surface 311 is distributed in a direction away from the axis L in the direction along the first end 37 to the second end 38 of the axial direction.

[0026] like Figure 7A As shown, in one specific embodiment, the first inner surface 311 is generally funnel-shaped and is an arc surface. In the direction A along the axial direction from the first end 37 to the second end 38, the first inner surface 311 gradually moves away from the axis of the seal 3. This reduces fluid flow resistance and facilitates the processing of the seal 3.

[0027] The fluid control assembly provided in this application has a channel 30 of the seal 3 corresponding to a valve port 11. Fluid can enter the valve port 11 through the guiding cavity 21 of the valve core and the channel 30 of the seal 3, realizing fluid flow. Simultaneously, because the wall of the channel 30 of the seal 3 includes a first inner surface 311, at least a portion of the first inner surface 311 extends away from the axis in the direction A along the axial direction from the first end 37 to the second end 38. Figures 4-7B As shown, the seal 3 includes a first outer surface 312, which is located radially outside the first inner surface 311. When the valve chamber 10 is filled with fluid ( Figure 4 (Illustrated by the black curve in the middle) After the fluid acts on the first outer surface 312 of the seal 3, the fluid acting on the first outer surface 312 squeezes the sealing lip 31. The sealing lip 31 is subjected to fluid pressure and tends to move towards the axis L. Since at least part of the first inner surface 311 extends away from the axis L in the direction A from the first end 37 to the second end 38 along the axial direction, the fluid pressure does not act perpendicularly on the sealing lip. When the fluid pressure increases, the distance between the sealing lip and the housing assembly decreases. When the hydraulic pressure increases, the compression of the sealing lip 31 increases, which increases the contact force between the seal 3 and the housing assembly 1. This can prevent the fluid in the valve cavity from entering the valve port along the gap between the sealing lip and the housing assembly, thereby reducing the risk of leakage, improving sealing performance, and extending service life.

[0028] The sealing lip 31 is an elastic element, thus enabling it to deform under fluid pressure. The sealing lip 31 is configured such that at least a portion of the sealing lip 31 forms an angle α with the axis (shown in...). Figure 7A (The sealing lip 31) is adjustable. The extension direction of the first inner surface of the sealing lip forms an acute angle with the axial direction. By setting the sealing lip to form an acute angle with the axis of the seal, when the fluid pressure increases, the inclined sealing lip can generate a corresponding compression based on the change in fluid pressure, so as to ensure that the sealing lip always seals against the housing assembly. In one specific embodiment, the angle α between at least a portion of the sealing lip 31 and the axis ranges from 0° to 60°, for example, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°.

[0029] like Figure 5 As shown, in one specific embodiment, the seal 3 further includes a mounting portion 32, which is located radially outward of the first outer surface 312. A liquid storage space 320 is formed between the mounting portion 32 and the wall of the defining channel 30. The mounting portion 32 has a first opening 300 communicating with the liquid storage space 320. The annular outer peripheral surface of the mounting portion 32 and the housing assembly 1 are matched in a limiting manner, which allows the fluid in the valve cavity to enter the liquid storage space through the outer surface of the mounting portion, and also serves to limit the seal to prevent the seal from moving significantly in the radial direction.

[0030] Fluid fills the valve chamber 10, and fluid on the surface of the mounting part enters the liquid storage space 320 through the first opening 300 of the mounting part 32. The first outer surface 312 of the sealing lip 31 defines a portion of the wall of the liquid storage space 320. The fluid acts on the first outer surface 312, applying a force towards the axis to the sealing lip 31. At the same time, the sealing lip 31 is inclined relative to the axis, causing the sealing lip 31 to be further compressed under the action of the fluid, thereby increasing the contact force between the sealing lip 31 and the housing assembly 1 and improving the sealing performance of the seal 3. Furthermore, as the hydraulic pressure of the fluid increases, the fluid force increases, the degree of compression of the seal 3 increases, and the sealing performance is further improved.

[0031] It can be seen that the seal 3 is squeezed and sealed with the valve core 2 and the housing assembly 1. When the hydraulic pressure is low, the sealing lip 31 provides elasticity through compression, making the seal 3 fit and seal with the valve core 2 and the housing assembly 1. When the hydraulic pressure increases, due to the inclined setting of the sealing lip 31, the hydraulic pressure in the reservoir 320 acts on the sealing lip 31, causing the sealing lip 31 to deform along the axis close to the seal 3, making the sealing lip 31 and the housing assembly 1 increasingly tighter, achieving a tight seal. By making the first inner surface 311 of the sealing lip 31 of the seal 3 with a certain inclined angle, and opening a certain number of first openings 300 in the mounting part 32, fluid can enter the reservoir 320 and act on the sealing lip 31 to press the sealing lip 31 against the housing assembly 1, the sealing performance of the seal 3 can be improved, and the self-sealing function of the seal 3 can be achieved without the need for external tools. This not only improves the sealing performance but also simplifies the structure of the seal 3. As the hydraulic pressure in the valve cavity increases, the sealing effect of the seal increases, thereby achieving the sealing effect by compensating for the elasticity of the rubber through fluid pressure.

[0032] In another specific embodiment, the second opening 300a of the liquid storage space 320 (shown in...) Figure 5 (Middle) Facing the second axial end 38, the mounting portion 32 is generally annular. Along the axial direction of the seal 3, the distance from the end of the mounting portion 32 to the cross section of the housing assembly perpendicular to the axis of the seal 3 is greater than or equal to the distance from the end of the first inner surface 311 to the same cross section. That is, the axial end of the mounting portion 32 does not exceed the axial end of the first inner surface 311. Figure 6 As shown, the distance between the axial end of the mounting portion 32 and the axial end of the first inner surface 311 is S. Since the end 314 of the sealing lip 31 abuts against the housing assembly 1, there is a certain gap S between the axial end of the mounting portion 32 and the housing assembly 1. (Refer to...) Figures 4-9When the fluid fills the valve chamber 10, the fluid can enter the liquid storage space 320 through the gap between the axial end of the mounting part 32 and the housing assembly 1. Then the fluid acts on the first outer surface 312 of the sealing lip 31, applying a force to the sealing lip 31 toward the axis L. At the same time, the sealing lip 31 is inclined relative to the axis L, so that the sealing lip 31 is further compressed under the action of the fluid, thereby increasing the contact force between the sealing lip 31 and the housing assembly 1 and improving the sealing performance of the seal 3.

[0033] Continue to refer to Figure 6 and Figure 7A , Figure 7B The mounting portion 32 defines the radial outer surface of the seal 3. Based on the gap S between the axial end of the mounting portion 32 and the axial end of the sealing lip, a first opening 300 can be further opened in the mounting portion 32. The first opening 300 communicates with the liquid storage space 320, so that the fluid can flow into the liquid storage space 320 simultaneously through the first opening 300 and the gap S. This can not only increase the speed at which the fluid enters the liquid storage space 320, but also save raw materials and reduce costs.

[0034] Please refer to Figure 6 and Figure 7A , Figure 7B In one specific embodiment, the first opening 300 is distributed along the axis L of the seal 3. For example... Figure 6 As shown, the mounting portion 32 has a plurality of first openings 300, which are arranged circumferentially around the mounting portion 32. The shape of the first openings 300 is not limited; of course, the first openings also include holes that penetrate radially along the mounting portion. The shape of the openings can be square, V-shaped, rectangular, circular, irregular, etc., as long as the first opening 300 can communicate with the liquid storage space 320 and allow fluid to flow into the liquid storage space 320 through the opening 300. The number of first openings 300 can be one or more. When there are multiple first openings 300, the size and shape of each first opening 300 can be the same or different. Of course, in one specific embodiment, the area of ​​a single first opening 300 is ≤3.5 mm². 2 The first opening 300 should not be too large to prevent the sealing lip from being detached from the housing assembly due to the sudden influx of fluid into the liquid storage space.

[0035] refer to Figure 7A and Figure 7BTo increase the strength of the sealing lip 31 and prevent excessively fast fluid flow from impacting the sealing lip 31 and causing it to detach from the housing assembly 1, thus posing a risk of fluid leakage, in one specific embodiment, the sealing lip 31 includes a root 313 and an end 314. The root 313 is a fixed end, the end of the root 313 is the end of the first outer surface 312, and the end 314 is a free end that abuts against the housing assembly 1. The first outer surface 312 of the sealing lip 31 includes a first axial end face 312a and a second axial end face 312b. The first axial end face 312a forms a part of the end 313 of the sealing lip 31. Along the axial direction parallel to the valve core 2, the distance S1 from the second axial end face 312b to the first inner surface 311 is defined as the thickness of the root 313, and the distance S2 from the first axial end face 312a to the first inner surface 311 is defined as the thickness of the end 314, where S1 ≥ S2.

[0036] It is easy to understand that the root 313 of the sealing lip 31 should not be too thin or too thick. If it is too thin, the fluid force may be too great, causing the sealing lip 31 to detach from the housing assembly 1 and resulting in fluid leakage. If it is too thick, more raw materials are needed, increasing costs. Therefore, in a specific embodiment, the thickness of the root 313 is in the range of 1.5mm-3.0mm, such as 1.8mm, 2mm, 2.5mm, etc. By setting the thickness of the root 313 of the seal 3 between 1.5mm and 3.0mm, the strength of the sealing lip 31 can be improved, resulting in a 70% improvement in sealing effect. Specifically, please refer to Table 1 below, which compares the sealing performance of sealing lips of different thicknesses under different fluid pressures. Mode 1 and Mode 2 represent two different operating modes of the three-way ball valve. Table 1 shows that when the root thickness of the sealing lip is 1.5 mm, the sealing lip is forced open and detached from the housing assembly 1 at a fluid pressure of 150 kPa. When the root thickness of the sealing lip is greater than 1.5 mm, the internal leakage sealing requirement can be met at a fluid pressure of 200 kPa. To save materials and reduce costs, the thickness of the sealing lip can be less than or equal to 3 mm.

[0037] Table 1. Comparison of sealing performance of sealing lips of different thicknesses under different fluid pressures.

[0038]

[0039] like Figure 5As shown, in one specific embodiment, a connecting rib 33 is provided between the mounting portion 32 and the wall portion defining the channel 30; by connecting the sealing lip 31 and the mounting portion 32 through the connecting rib 33, the strength of the sealing lip 31 can be further increased. The position of the connecting rib 33 is not limited, and the connecting rib 33 and the opening 300 are spaced apart circumferentially along the mounting portion 32 to improve the structural strength of the seal 3. In one specific embodiment, the connecting rib 33 can be close to the root 313 of the sealing lip 31, thereby increasing the space of the liquid storage space 320 and providing more space for the fluid acting on the end 314.

[0040] like Figure 7A and Figure 7B As shown, in one specific embodiment, the mounting portion 32 includes an elastic layer 321 and a skeleton layer 322, with at least a portion of the skeleton layer 322 covering the elastic layer 321. By embedding the skeleton layer 322 within the elastic layer 321, the deformation resistance of the mounting portion 32 is increased, reducing the risk of deformation during the installation of the seal 3 and thus improving the sealing performance of the seal 3. In one specific embodiment, the elastic layer 321 is made of rubber, and the skeleton layer 322 is made of metal. In other embodiments, the skeleton layer 322 can also be made of resin, as long as the hardness of the skeleton layer 322 is greater than that of the elastic layer 321.

[0041] In one specific embodiment, to further improve the strength of the mounting part 32, the skeleton layer 322 is generally annular, and the skeleton layer 322 is made of metal ring, which provides high support strength. Of course, in other embodiments, the shape of the skeleton layer is not limited, and the metal skeleton layer 322 can also be metal sheets, metal blocks, or metal wires dispersedly embedded in the elastic layer 321. By embedding a metal skeleton in the elastic layer, wear and deformation of the seal are reduced, and the life performance of the water valve is improved.

[0042] In one specific embodiment, along the axis L of the seal 3, the width of the skeleton layer 322 is smaller than the width of the elastic layer 321. On the one hand, this avoids the skeleton layer 322 blocking the first opening 300; on the other hand, it reduces the material used in the skeleton layer 322 while still meeting the required support strength, thus saving costs. Of course, in other embodiments, the width of the skeleton layer 322 is not limited, as long as it does not exceed the axial second end of the sealing lip 31.

[0043] In one specific embodiment, the seal 3 can be a one-piece molded part for ease of processing. Since the seal 3 is a single-piece structure, problems such as increased assembly steps, potential loss or breakage, or jamming of the valve core 2 can be avoided. Of course, in other embodiments, the skeleton layer 322 and the elastic layer 321 of the seal 3 can also be combined and fixed together by bonding or other methods.

[0044] In one specific embodiment, the seal 3 further includes a second inner surface 36, which is disposed opposite to the first inner surface 311. The outer peripheral wall of the valve core 2 includes a spherical surface. At least a portion of the second inner surface 36 contacts and seals with the spherical surface. The second inner surface 36 abuts against the valve core 2, and at least the area of ​​the second inner surface 36 abutting against the valve core 2 has a wear-resistant coating. The wear-resistant coating may be a PTFE coating, achieving self-lubrication and reducing friction between the valve core and the seal. The arc surface of the seal is sprayed with PTFE, or the wear-resistant coating is bonded and fixed to the rubber body of the seal.

[0045] The second inner surface 36 and the contact surface of the valve core 2 adopt a spherical seal, which can reduce the friction between the sealing component and the valve core 2, reduce the operating resistance, reduce the torque of the valve body components, improve the product's operating stability, and further extend the service life of the fluid control component.

[0046] The seal also includes a side surface 39, which is fixedly connected to or integrally formed with a second inner surface 36. The outer side of the side surface 39 is fixed to the mounting part 32, and the second inner surface is in sealing contact with the valve core 2.

[0047] Please refer to Figures 5-7B To solve the above problems, this application also provides a sealing element 3, the sealing element 3 having a channel 30, the sealing element 3 including a first inner surface 311, the first inner surface 311 defining a portion of the wall of the channel 30, the first inner surface 311 being generally annular, the sealing element 3 including an axial first end 37 and an axial second end 38, at least a portion of the first inner surface 311 extending in a direction away from the axis in the direction along the axial first end 37 to the axial second end 38;

[0048] The seal 3 also includes a mounting portion 32, which is located radially outward of the first inner surface 311, and a liquid storage space 320 is formed between the mounting portion 32 and the wall portion defining the channel 30.

[0049] The mounting portion 32 has an opening 300 communicating with the liquid storage space 320; and / or, the opening 300 of the liquid storage space 320 faces the second axial end 38, the mounting portion 32 is generally annular, and along the axial direction of the seal 3, the end 314 of the mounting portion 32 does not exceed the end 314 of the first inner surface 311.

[0050] The sealing element provided in this application can be disposed between the valve core 2 and the housing assembly 1. Fluid acts on the first outer surface 312, applying a force towards the axis to the sealing lip 31. Simultaneously, the sealing lip 31 is inclined relative to the axis, causing it to be further compressed under the action of the fluid, thereby increasing the contact force between the sealing lip 31 and the housing assembly 1 and improving the sealing performance of the sealing element 3. Furthermore, as the internal pressure of the fluid increases, the fluid force increases, the degree of compression of the sealing element 3 increases, and the sealing performance is further improved. It can be seen that the sealing element 3 is squeezed and sealed with the valve core 2 and the housing assembly 1. When the hydraulic pressure is low, the compression of the sealing lip 31 body provides elasticity, causing the sealing element 3 to adhere and seal with the valve core 2 and the housing assembly 1. When the hydraulic pressure increases, due to the inclined arrangement of the sealing lip 31, the hydraulic pressure acts on the sealing lip 31, making it increasingly tighter, achieving a tight seal. By making the first inner surface 311 of the sealing lip 31 of the seal 3 into a structure with a certain outward tilt angle, and opening a certain number of openings 300 on the outer circular surface of the mounting part 32, fluid can enter the liquid storage space 320 and act on the sealing lip 31 to press the sealing lip 31 against the housing assembly 1, the sealing performance of the seal 3 can be improved, and the self-sealing function of the seal 3 can be achieved without the aid of external tools. This not only improves the sealing performance but also simplifies the structure of the seal 3.

[0051] The leakage rate of the seal after 800,000 cycles at 100 kPa is less than or equal to 5.5 mL / min; and / or, the leakage rate of the seal after 800,000 cycles at 200 kPa is less than or equal to 2 mL / min.

[0052] The seal provided in this application can be disposed between the valve core and the housing assembly. Fluid acts on the first outer surface 312, applying a force towards the axis to the sealing lip 31. Simultaneously, the sealing lip 31 is inclined relative to the axis, causing it to be further compressed under the action of the fluid, thereby increasing the contact force between the sealing lip 31 and the housing assembly 1, and improving the sealing performance of the seal 3. Furthermore, as the internal pressure of the fluid increases, the fluid force increases, the degree of compression of the seal 3 increases, and the sealing performance is further improved. It can be seen that the seal 3 is squeezed and sealed with the valve core 2 and the housing assembly 1. When the hydraulic pressure is low, the compression of the sealing lip 31 body provides elasticity, causing the seal 3 to fit and seal with the valve core 2 and the housing assembly 1. When the hydraulic pressure increases, due to the inclined arrangement of the sealing lip 31, the hydraulic pressure acts on the sealing lip 31, making it increasingly tighter, achieving a tight seal. By making the first inner surface 311 of the sealing lip 31 of the seal 3 into a structure with a certain outward tilt angle, and opening a certain number of openings 300 on the outer circular surface of the mounting part 32, fluid can enter the liquid storage space 320 and act on the sealing lip 31 to press the sealing lip 31 against the housing assembly 1, the sealing performance of the seal 3 can be improved, and the self-sealing function of the seal 3 can be achieved without the aid of external tools. This not only improves the sealing performance but also simplifies the structure of the seal 3.

[0053] Figure 10 This is an electronic water valve seal (denoted as the comparative seal) and this application. Figure 3 The data of internal leakage test of the seals in the sample at 100 kPa and 200 kPa respectively. Figure 11 This is a structural schematic diagram of the comparative sealing element. The comparative sealing element 9 consists of two parts: a plastic sealing block 91 and a rubber sealing ring 92. The rubber sealing ring 92 abuts against the housing, and the plastic sealing block 91 makes sealing contact with the ball valve core. The testing equipment for the comparative experiment is a water valve performance testing bench, model QLTC-KF-B-0214, and the fluid medium is an ethylene glycol aqueous solution (ratio 1:1). Figure 10As can be seen, when the fluid pressure is 100 kPa, after 400,000 durability tests, the leakage of the comparative seal reaches 22 mL / min, while the leakage of the seal in this embodiment is 8 mL / min. Moreover, as the number of tests increases, the leakage of the seal in this application under the same experimental conditions is always lower than that of the comparative seal. When the fluid pressure is 200 kPa, after 150,000 durability tests, the leakage of the comparative seal reaches 16 mL / min, while the leakage of the seal in this embodiment is 1.5 mL / min. Furthermore, after 800,000 cycles of testing, the leakage of the seal in this application at 200 kPa is still no higher than 1 mL / min. After 80W cycles of testing, the leakage of the comparative seal was 10mL / min, while the leakage of the hydraulic self-sealing seal was 1mL / min, a decrease of 9mL / min. Compared to the comparative seal, the sealing performance of the seal of this application is improved by 90% at 200kPa. Therefore, the sealing performance of the seal of this application at 100kPa is better than that of the comparative seal. Furthermore, as the fluid pressure increases, the sealing performance of the seal of this application at 200kPa is better than that at 100kPa. The seal of this application also has a self-sealing function under high pressure.

[0054] The above embodiments only illustrate several implementation methods of this application, and their descriptions are quite specific, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make several modifications without departing from the concept of this invention, and these modifications all fall within the protection scope of this invention.

Claims

1. A fluid control component, characterized in that, The fluid control assembly includes a housing assembly (1) and a valve core (2), the housing assembly (1) having a valve cavity (10), at least a portion of the valve core (2) being located within the valve cavity (10); the fluid control assembly further includes a seal (3), the seal (3) being sealed between the valve core (2) and the housing assembly (1), the seal (3) having a channel (30), the housing assembly (1) having a valve port (11) communicating with the valve cavity, the channel (30) and the valve port (11) corresponding to each other; The seal (3) includes a sealing lip (31), the sealing lip (31) including a first inner surface. (311), the first inner surface (311) defines a portion of the wall of the channel (30), the sealing lip (31) abuts against the housing assembly (1), the sealing lip (31) is generally annular and points along the channel (30) in the direction corresponding to the valve port (11), at least a portion of the first inner surface (311) extends in a direction away from the axis of the seal (3), and the projection of the wall defining the valve port (11) is located within the projection of the wall of the channel (30) defined by the axial end of the sealing lip (31).

2. The fluid control assembly as claimed in claim 1, characterized in that, The first inner surface (311) is generally funnel-shaped and is an arc surface. The seal (3) includes an axial first end (37) and an axial second end (38). The axial first end (37) faces the valve core (2), and the axial second end (38) faces the housing assembly (1). In the direction from the axial first end (37) to the axial second end (38), the first inner surface (311) gradually moves away from the axis of the seal (3). The sealing lip (31) is configured such that at least a portion of the sealing lip (31) has an adjustable angle with the axis.

3. The fluid control assembly as described in claim 2, characterized in that, The angle between at least a portion of the sealing lip (31) and the axis ranges from 0° to 60°.

4. The fluid control assembly according to any one of claims 1-3, characterized in that, The sealing lip (31) further includes a first outer surface (312) located radially outside the first inner surface (311). The sealing member (3) further includes a mounting portion (32) located radially outside the first outer surface (312). A liquid storage space (320) is formed between the mounting portion (32) and the wall portion defining the channel (30). The liquid storage space (320) communicates with the valve chamber (10). The mounting portion (32) has at least one first opening (300) communicating with the liquid storage space (320), each of the first openings (300) being distributed along the axis of the seal (3); and / or, the liquid storage space (320) has a second opening (300a) facing the housing assembly (1), the mounting portion (32) being generally annular along the axial direction of the seal (3), the distance from the end of the mounting portion (32) to the housing assembly section perpendicular to the axis of the seal being greater than or equal to the distance from the end (314) of the first inner surface (311) to the same section.

5. The fluid control assembly as described in any one of claims 1-3, characterized in that, The sealing lip (31) includes a root (313) and an end (314), the end (314) abutting against the housing assembly (1). The sealing lip (31) also includes a first outer surface (312), the first outer surface (312) including a first axial end face (312a) and a second axial end face (312b). The first axial end face (312a) forms a portion of the end (313) of the sealing lip (31). Along a direction parallel to the axis of the valve core (2), the distance S1 from the second axial end face (312b) to the first inner surface (311) is defined as the thickness of the root (313), and the distance S2 from the first axial end face (312a) to the first inner surface (311) is defined as the thickness of the end (314). S1≥S2; The thickness S1 of the root (313) is in the range of 1.5mm < S1 ≤ 3.0mm.

6. The fluid control assembly as claimed in claim 4, characterized in that, A connecting rib (33) is provided between the mounting part (32) and the sealing lip (31); and / or, the sealing element (3) is an integrally molded part.

7. The fluid control assembly as claimed in claim 4, characterized in that, The mounting part (32) includes an elastic layer (321) and a skeleton layer (322), with at least a portion of the skeleton layer (322) covering the elastic layer (321); The skeleton layer (322) is generally annular, the hardness of the skeleton layer (322) is greater than the hardness of the elastic layer (321), and the width of the skeleton layer (322) is smaller than the width of the elastic layer (321).

8. The fluid control assembly according to any one of claims 1-3, characterized in that, The seal (3) further includes a second inner surface (36), which is disposed opposite to the first inner surface (311). The outer peripheral wall of the valve core (2) includes a spherical surface. At least a portion of the second inner surface (36) contacts and seals with the spherical surface. At least the area of ​​the second inner surface (36) in contact with the valve core (2) has a wear-resistant coating.

9. A sealing element, characterized in that, The seal has a channel (30) and includes a sealing lip (31). The sealing lip (31) includes a first inner surface (311) that defines a portion of the wall of the channel (30). The first inner surface (311) is generally annular. The seal is capable of sealing between a valve core (2) and a housing assembly (1). The housing assembly (1) has a valve port (11) communicating with a valve cavity (10). The channel (30) and the valve port (11) correspond to each other, and the projection of the wall defining the valve port (11) is located within the projection of the wall of the channel (30) defined by the axial end of the sealing lip (31). At least a portion of the first inner surface (311) extends away from the axis of the seal along the direction of the channel (30) corresponding to the valve port (11).

10. The seal as claimed in claim 9, characterized in that, It also includes a mounting portion (32) located radially outside the first inner surface (311), and a liquid storage space (320) is formed between the mounting portion (32) and the wall portion defining the channel (30); The mounting portion (32) has a first opening (300) communicating with the liquid storage space (320); the opening area of ​​the first opening (300) is less than or equal to 3.5 mm. 2 ; and / or, the liquid storage space (320) has a second opening (300a) facing the corresponding housing assembly (1), the mounting portion (32) is generally annular along the axial direction of the seal, the distance from the end of the mounting portion (32) to the housing assembly section perpendicular to the axis of the seal is greater than or equal to the distance from the end (314) of the first inner surface (311) to the same section; the sealing lip (31) is configured such that at least a portion of the sealing lip (31) has an adjustable angle with the axis.

11. The seal as claimed in claim 9, characterized in that, The sealing lip (31) includes a root (313) and an end (314), the end (314) abutting against the housing assembly (1). The sealing lip (31) also includes a first outer surface (312), the first outer surface (312) including a first axial end face (312a) and a second axial end face (312b). (312a) A portion of the end (313) of the sealing lip (31) is formed along a direction parallel to the axis of the valve core (2). The distance S1 from the second axial end face (312b) to the first inner surface (311) is defined as the thickness of the root (313). The first axial end face is defined as... The distance S2 from (312a) to the first inner surface (311) is the thickness of the end (314). S1≥S2; The thickness S1 of the root (313) ranges from 1.5mm to 3.0mm.

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