Radial sealing device and fuel cell

Abstract

The utility model provides a radial sealing device and a fuel cell. The radial sealing device comprises a sealing ring, a male end part and a female end part, the bulge of the male end part comprises an outer side wall, the recess of the female end part comprises an inner side wall, and the outer side wall and the inner side wall have the same taper; a groove is formed in the outer side wall of the male end part and is used for placing a sealing ring; and after the male end part is inserted into the female end part, the sealing ring is in contact with the convex outer side wall and the concave inner side wall to form sealing. The outer side wall of the male end protrusion has the taper, and the inner side wall of the female end recess also has the taper the same as that of the outer side wall, so that when the male end protrusion is inserted into the female end recess, a gap between the male end and the female end is larger than that of the male end and the female end without the taper, the compression degree of the sealing ring is smaller, and the sealing effect is better. And the relative pressure between the sealing ring and the inner side wall of the concave part of the female end part is smaller, so that the risks of scratching and twisting of the sealing ring in the mounting process can be reduced.

Description

Technical Field

[0001] This application belongs to the field of sealing technology, specifically relating to a radial sealing device and a fuel cell. Background Technology

[0002] Current radial sealing devices are installed in a compressed state. When the male end with the sealing ring is inserted into the female end, there is significant friction between the sealing ring and the recessed inner wall of the female end, thus posing a considerable risk of sealing ring twisting. If there are tiny burrs on the recessed port or inner wall of the female end, these burrs can easily scratch the surface of the sealing ring under the compression of the male and female ends. Twisting or scratching of the sealing ring will affect the sealing effect of the radial sealing device.

[0003] Therefore, there is a need in the art for a radial sealing device with a low risk of scratching and twisting of the sealing ring during installation. Utility Model Content

[0004] To address the problems existing in the prior art, a radial sealing device and fuel cell are proposed. Using this radial sealing device and fuel cell, the risk of scratches and twisting of the sealing ring during installation can be reduced.

[0005] This application provides the following solutions.

[0006] In a first aspect, this application provides a radial sealing device, comprising: a sealing ring, a male end, and a female end;

[0007] The male end protrusion includes an outer sidewall, and the female end recess includes an inner sidewall, with the outer and inner sidewalls having the same taper.

[0008] The outer wall of the male end is provided with a groove for placing a sealing ring;

[0009] After the male end is inserted into the female end, the sealing ring contacts the raised outer wall and the recessed inner wall to form a seal.

[0010] In some possible embodiments, the protrusion at the male end includes an outer sidewall and an end face, and the recess at the female end includes an inner sidewall and a bottom face.

[0011] After the male end is inserted into the female end, the outer side wall and the inner side wall fit together, and there is a cavity between the end face and the bottom face.

[0012] In some possible embodiments, the protrusion at the male end is frustum-shaped, and the angle between the generatrix of the protrusion and the axis is greater than 0 degrees and less than 90 degrees.

[0013] In some possible embodiments, the angle between the protruding generatrix at the male end and the axis is 8 degrees.

[0014] In some possible embodiments, the protruding outer sidewall of the male end is provided with a groove in the circumferential direction;

[0015] The sealing ring is an O-ring, and the cross-sectional diameter of the O-ring is greater than the depth of the groove.

[0016] In some possible embodiments, the cross-sectional diameter of the O-ring is 1.8 mm to 2.65 mm.

[0017] In some possible embodiments, the male end also includes a sealing plate, with the first side of the protrusion away from the end face connecting to the sealing plate;

[0018] The sealing plate is provided with a first screw hole, and the female end recess is provided with a second screw hole corresponding to the first screw hole;

[0019] The fixing component passes through the first screw hole and the second screw hole to fix the male end and the female end.

[0020] In some possible embodiments, radial sealing devices are applied to proton exchange membrane fuel cells.

[0021] Secondly, this application provides a fuel cell that includes the aforementioned radial sealing device.

[0022] The radial sealing device provided in this application embodiment has a tapered outer wall on the male end protruding and a tapered inner wall on the female end recessed. This allows the gap between the male end and the female end to be larger when the male end protruding is inserted into the female end recess compared to male and female ends without tapering. The sealing ring is compressed less, and the relative pressure between the sealing ring and the inner wall of the female end recess is less, thereby reducing the risk of scratching and twisting of the sealing ring during installation.

[0023] Other advantages of this application will be explained in more detail with reference to the following description and figures.

[0024] It should be understood that the above description is merely an overview of the technical solution of this application, so as to enable a clearer understanding of the technical means of this application and thus allow for its implementation in accordance with the contents of the specification. To make the above and other objects, features, and advantages of this application more apparent and understandable, specific embodiments of this application are illustrated below. Attached Figure Description

[0025] By reading the detailed description of the exemplary embodiments below, those skilled in the art will understand the advantages and benefits described herein, as well as other advantages and benefits. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0026] Figure 1A schematic diagram of a radial sealing device provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the installation of a radial sealing device provided in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the installation of another radial sealing device provided in an embodiment of this application;

[0029] Figure 4 A schematic diagram of another radial sealing device provided in the embodiments of this application;

[0030] Figure 5 A schematic diagram of a sealing ring provided in an embodiment of this application;

[0031] Figure 6 A schematic diagram of a radial sealing device provided in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of the installation of a radial sealing device provided in an embodiment of this application.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] Sealing ring 100; male end 200; outer side wall 201; groove 202; end face 203; sealing plate 204; first screw hole 205; female end 300; inner side wall 301; bottom surface 302; second screw hole 303.

[0035] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts. Detailed Implementation

[0036] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0037] In the description of embodiments of this application, it should be understood that terms such as "comprising" or "having" are intended to indicate the presence of the disclosed features, numbers, steps, actions, components, portions, or combinations thereof in this specification, and do not exclude the possibility of the presence of one or more other features, numbers, steps, actions, components, portions, or combinations thereof. The terms "first," "second," etc., are used only for ease of description to distinguish identical or similar technical features and should not be construed as indicating or implying the relative importance or number of these technical features. Thus, a feature defined by "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of embodiments of this application, unless otherwise stated, the term "multiple" means two or more.

[0038] Unless otherwise stated, " / " signifies "or," for example, A / B can mean either A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. For ease of description, spatial relation terms such as "below," "under," "above," and "upper" may be used here to describe the relationship between one element or feature shown in the accompanying drawings and other elements or features. It will be understood that these spatial relation terms are intended to include directions other than those depicted in the accompanying drawings for devices in use or operation.

[0039] It should also be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0040] In traditional radial sealing devices, the male and female ends are typically cylindrical without taper. Therefore, when the male end with the sealing ring is inserted into the female end, there is significant friction between the sealing ring and the recessed inner wall of the female end, leading to a greater risk of twisting and scratching of the sealing ring. To address this issue, conventional techniques typically apply grease during radial sealing device installation to aid in installation and reduce the risk of twisting and scratching. However, in some specialized devices, such as proton exchange membrane fuel cells, the lubricating oil from the radial sealing device can seep into the internal components, affecting its performance.

[0041] To address the aforementioned technical problems, this application provides a radial sealing device that can reduce the risk of scratches and twisting of the sealing ring during installation without the use of lubricating oil.

[0042] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] See Figure 1 The figure is a schematic diagram of a radial sealing device provided in an embodiment of this application.

[0044] like Figure 1 As shown, the radial sealing device provided in this application embodiment includes: a sealing ring 100, a male end 200, and a female end 300;

[0045] The male end 200 has a protrusion including an outer sidewall 201, and the female end 300 has a recess including an inner sidewall 301, the inner sidewall 301 having the same taper as the outer sidewall 201.

[0046] The outer wall 201 of the male end 200 is provided with a groove 202, which is used to place the sealing ring 100;

[0047] After the male end 200 is inserted into the female end 300, the sealing ring 100 contacts the raised outer sidewall 201 and the recessed inner sidewall 301 to form a seal.

[0048] It should be noted that, in this embodiment, the outer sidewall 201 of the male end 200 and the inner sidewall 301 of the female end 300 have the same taper, such as Figure 2 As shown, during the insertion of the male end 200 into the female end 300, the gap between the male end 200 and the female end 300 gradually decreases, and the sealing ring 100 is gradually compressed until it reaches the target position. Therefore, compared with radial sealing devices without a taper, the sealing ring in this application is compressed to a lesser extent, resulting in less relative pressure between the sealing ring and the recessed inner wall of the female end, thereby reducing the risk of scratches and twisting of the sealing ring during installation.

[0049] It should be noted that the radial sealing device provided in this application embodiment can be applied to proton exchange membrane fuel cells. The proton exchange membrane, a core component inside the fuel cell stack, is highly sensitive to substances such as lubricating oil. Using lubricating oil in the radial sealing device can easily allow it to enter the proton exchange membrane fuel cell, poisoning it and causing a severe decline in performance, or even complete failure. Therefore, lubricating oil cannot be used for the installation of the radial sealing device in a proton exchange membrane fuel cell. The radial sealing device provided in this application embodiment features a tapered outer wall at the male end and a tapered inner wall at the female end, which reduces the relative pressure between the sealing ring and the recessed inner wall of the female end. This reduces the risk of scratches and twisting of the sealing ring during installation without the use of lubricating oil.

[0050] As one possible implementation method, such as Figure 3As shown, in the embodiments of this application, the protrusion of the male end 200 may include an outer sidewall 201 and an end face 203, and the recess of the female end 300 includes an inner sidewall 301 and a bottom face 302; after the male end 200 is inserted into the female end 300, the outer sidewall 301 and the inner sidewall 301 fit together, and there is a cavity between the end face 203 of the male end 200 and the bottom face 302 of the female end 300.

[0051] In practical applications, the protrusion at the male end in this embodiment can be frustum-shaped, with the angle between the generatrix of the protrusion and the axis greater than 0 degrees and less than 90 degrees. As an example, such as... Figure 4 As shown, in this embodiment, the angle between the generatrix of the male end protruding and the axis can be 8 degrees. It should be noted that when the angle between the generatrix of the male end protruding and the axis is 8 degrees, it can simultaneously ensure that the compression ratio and compression direction of the O-ring are similar to those of the O-ring in a radial sealing device without a taper.

[0052] In this embodiment, the protruding outer wall of the male end can be provided with a groove in the circumferential direction. For example... Figure 5 As shown, the sealing ring can be an O-ring, and the cross-sectional diameter D1 of the O-ring is greater than the depth of the groove. As an example, the cross-sectional diameter D1 of the O-ring can be 2.65 mm, and the corresponding groove depth can be 1.96 mm. As another example, the cross-sectional diameter D1 of the O-ring can also be 1.8 mm. Figure 6 As shown, if the cross-sectional diameter D1 of the O-ring is 2.65 mm, the diameter D2 of the recessed port of the female end 300 can be 21-51 mm. If the cross-sectional diameter D1 of the O-ring is 1.8 mm, the diameter D2 of the recessed port of the female end 300 can be 15-20 mm.

[0053] In the embodiments of this application, such as Figure 4 and Figure 7 As shown, the male end 200 also includes a sealing plate 204, and the first side of the protrusion of the male end 200 away from the end face is connected to the sealing plate 204. As an example, the horizontal distance from the groove 202 on the male end 200 to the sealing plate 204 can be 2.5D1. If D1 is 2.65mm, the horizontal distance from the groove 202 on the male end 200 to the sealing plate 204 can be 6.625mm.

[0054] In this embodiment, a first screw hole 205 is provided on the sealing plate 204, and a second screw hole 303 corresponding to the first screw hole 205 is provided around the recess of the female end 300. A fixing component (not shown in the figure) passes through the first screw hole 205 and the second screw hole 303 to fix the male end 200 and the female end 300. The fixing component in this embodiment can be a screw or bolt, etc., and is not limited thereto. It should be noted that both the male end and the female end in this embodiment are tapered, which results in an axial component of the pressure on the sealing ring. Therefore, this application uses a fixing component to fix the male end and the female end to prevent the male end from coming out of the female end under the action of axial force.

[0055] The following is a specific example to illustrate the scheme of this application.

[0056] Taking an O-ring with a cross-sectional diameter of 2.65mm as an example, the depth of the groove is approximately 1.96mm, and the compression of the O-ring at the sealing position is 2.65mm - 1.96mm = 0.69mm.

[0057] If a non-tapered radial sealing device is used, and the O-ring is installed 10mm from the female end port, the O-ring will be compressed by 0.69mm throughout its installation path, i.e., during the insertion of the male end into the female end. The force between the O-ring and the inner wall of the female end is 0.69k, where k is the reaction force per unit compression of the O-ring.

[0058] In the radial sealing device provided in this application embodiment, the compression of the O-ring decreases by 0.14 mm for every 1 mm retraction of the O-ring. Taking a distance of 6 mm between the O-ring and the port of the female end as an example, the compression of the sealing ring at the installation position is 0.69 mm, the compression of the sealing ring along the path is tan8°*L, and the force exerted between the sealing ring and the inner wall of the female end is tan8°*L*K, where L is the distance between the O-ring and the port of the female end. During installation, the force between the O-ring and the inner wall of the female end is 0 when the O-ring is 1mm away from the female end; 0.13k when the O-ring is 2mm away; 0.27k when the O-ring is 3mm away; 0.41k when the O-ring is 4mm away; and 0.55k when the O-ring is 5mm away. All these values ​​are less than 0.69k. When the O-ring is 6mm away from the female end, i.e., when the O-ring reaches the installation position, the force between the O-ring and the inner wall of the female end is 0.69k. Therefore, although the force between the O-ring and the inner wall of the female end is 0.69k in both schemes, the force between the O-ring and the inner wall in the technical solution of this application is less than 0.69k during installation. Thus, the technical solution of this application can reduce the risk of scratches and twisting of the sealing ring during installation without the use of lubricating oil.

[0059] In summary, the radial sealing device provided in this application embodiment can reduce the relative pressure between the sealing ring and the recessed inner wall of the female end during installation, thereby reducing the risk of scratching and twisting of the sealing ring during installation. The radial sealing device provided in this application embodiment can be applied to devices such as proton exchange membrane fuel cells that do not use lubricating oil. The radial sealing device provided in this application embodiment, through its design where the outer wall of the male end has a taper and the inner wall of the female end also has the same taper, reduces the relative pressure between the sealing ring and the recessed inner wall of the female end, thus reducing the risk of scratching and twisting of the sealing ring during installation without the use of lubricating oil.

[0060] While illustrative embodiments of this application have been detailed and described in the accompanying drawings and foregoing description, they should be considered illustrative rather than restrictive. It should be understood that only certain exemplary embodiments have been shown and described, and all variations and modifications intended to protect within the spirit and scope of the claimed invention are intended to be protected. It should be understood that while the use of terms such as preferred, preferred, or more preferred in the above description to indicate that such described features may be more desirable, it may not be necessary, and implementations without these features may be contemplated, for example, within the scope of the invention defined by the appended claims. When reading the claims, the use of terms such as “a,” “an,” “at least one,” or “at least a portion” is not intended to limit the claim to one item unless specifically stated otherwise in the claim. When the language “at least a portion” and / or “a portion” is used, an item may include a portion and / or the entire item unless specifically stated otherwise.

[0061] While the spirit and principles of this application have been described above with reference to several specific embodiments, it should be understood that this application is not limited to the disclosed specific embodiments, and the division of aspects does not imply that features in these aspects cannot be combined. This application is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

[0062] Based on the radial sealing device provided in the above embodiments, this application also provides a fuel cell. The fuel cell includes the aforementioned radial sealing device.

[0063] In summary, the fuel cell provided in this application embodiment can reduce the relative pressure between the sealing ring and the recessed inner wall of the female end during installation, thereby reducing the risk of scratching and twisting of the sealing ring during installation. The installation method of the radial sealing device provided in this application embodiment can be particularly applied to devices such as proton exchange membrane fuel cells that do not use lubricating oil. The fuel cell provided in this application embodiment, through the design that the outer wall of the male end has a taper and the inner wall of the female end also has the same taper, can reduce the relative pressure between the sealing ring and the recessed inner wall of the female end, thereby reducing the risk of scratching and twisting of the sealing ring during installation without using lubricating oil.

[0064] In the description of this specification, references to terms such as "some possible implementations," "some implementations," "example," "specific example," or "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that implementation or example is included in at least one implementation or example of this application, and the aforementioned terms do not necessarily refer to the same implementation or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more implementations or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different implementations or examples described in this specification, as well as the features of different implementations or examples.

[0065] The method flowcharts for embodiments of this application describe certain operations as different steps performed in a certain order. Such flowcharts are illustrative and not restrictive. Some steps described herein may be grouped together and performed in a single operation, or some steps may be divided into multiple sub-steps, and some steps may be performed in an order different from that shown herein. The various steps shown in the flowcharts may be implemented in any way by any circuit structure and / or tangible mechanism (e.g., by software running on a computer device, hardware (e.g., logic functions implemented by a processor or chip), and / or any combination thereof).

[0066] Those skilled in the art will understand that in the methods described in the above specific embodiments, the order in which the steps are written does not imply a strict execution order, and the specific execution order of each step should be determined by its function and possible internal logic.

Claims

1. A radial sealing device, characterized in that, include: Sealing ring, male end and female end; The male end protrusion includes an outer sidewall, and the female end recess includes an inner sidewall, the outer sidewall and the inner sidewall having the same taper; The outer wall of the male end is provided with a groove for placing the sealing ring; After the male end is inserted into the female end, the sealing ring contacts the outer wall of the protrusion and the inner wall of the recess to form a seal.

2. The radial sealing device according to claim 1, characterized in that, The male end protrusion includes an outer sidewall and an end face, and the female end recess includes an inner sidewall and a bottom face; After the male end is inserted into the female end, the outer sidewall and the inner sidewall are attached, and there is a cavity between the end face and the bottom face.

3. The radial sealing device according to claim 1, characterized in that, The protrusion at the male end is frustum-shaped, and the angle between the generatrix of the protrusion and the axis is greater than 0 degrees and less than 90 degrees.

4. The radial sealing device according to claim 3, characterized in that, The angle between the protruding generatrix at the male end and the axis is 8 degrees.

5. The radial sealing device according to claim 1, characterized in that, The protruding outer side wall of the male end is provided with a groove in the circumferential direction; The sealing ring is an O-ring, and the cross-sectional diameter of the O-ring is greater than the depth of the groove.

6. The radial sealing device according to claim 5, characterized in that, The cross-sectional diameter of the O-ring is 1.8mm-2.65mm.

7. The radial sealing device according to claim 1, characterized in that, The male end also includes a sealing plate, and the first side of the protrusion away from the end face is connected to the sealing plate; The sealing plate is provided with a first screw hole, and the female end recess is provided with a second screw hole corresponding to the first screw hole; The fixing component passes through the first screw hole and the second screw hole to fix the male end and the female end.

8. A fuel cell, characterized in that, Includes the radial sealing device according to any one of claims 1-7.

Images