Self-locking seal ring and its mounting structure for automotive filters

Abstract

This invention relates to a self-locking sealing ring for automotive filters, installed in the automotive filter. The self-locking sealing ring includes an O-shaped sealing ring body. Raised annular rings are provided on the inner and outer circumferential walls of the upper and lower ends of the sealing ring body. These raised annular rings protrude radially outwards along the sealing ring body as sealing arc surfaces. A groove is provided axially at the middle of the upper and lower ends of the sealing ring body. Compared with the prior art, the self-locking sealing ring of this invention, with its raised annular rings and grooves, helps reduce friction during assembly, facilitating installation, and increases the contact pressure between the sealing position of the sealing ring and the mating parts, making the sealing performance at that point more reliable during operation and forming a self-locking function.

Description

Technical Field

[0001] This invention relates to the field of filter technology, and more specifically to a self-locking sealing ring for automotive filters and its mounting structure. Background Technology

[0002] With the continuous development of modern industry, sealing rings play a huge role in various industries, and their performance requirements are not the same. For sealing rings used in different occasions, the focus and consideration are also different. However, the core function of sealing rings is still sealing. While meeting the different temperature and life requirements of customers, sealing performance is the most important part. However, the sealing rings on the market mainly achieve the sealing effect through structural matching, which can also lead to difficult installation and the sealing not fully meeting the requirements.

[0003] In air filters, the sealing ring is a crucial component, as its sealing performance directly affects the quality of the filter. However, existing sealing rings present significant installation resistance, and the contact force between the sealing ring and the mating parts is generally small after installation, requiring additional clamping force to achieve a good sealing effect. This is especially true for air filters in automobiles, where the filter's sealing performance is significantly challenged by bumps and vibrations during vehicle use, increasing the risk of leakage. Summary of the Invention

[0004] The purpose of this invention is to provide a self-locking sealing ring and its installation structure for automotive filters in order to solve the above-mentioned problems.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A self-locking sealing ring for an automotive filter, installed in the automotive filter, the self-locking sealing ring includes an O-shaped sealing ring body, with raised rings on the inner and outer circumferential walls at the upper and lower ends of the sealing ring body, the raised rings protruding outward along the radial direction of the sealing ring body as a sealing arc surface, and a groove provided in the middle of the upper and lower ends of the sealing ring body along its axial direction.

[0007] Furthermore, the raised annulus and groove at both ends of the sealing ring body are symmetrically arranged.

[0008] Furthermore, the slot is a U-shaped slot.

[0009] Furthermore, the size of the raised ring located on the inner ring of the sealing ring body is larger than that of the raised ring located on the outer ring of the sealing ring body.

[0010] Furthermore, the thickness of the raised annulus located on the inner ring of the sealing ring body is the same as the depth of the groove.

[0011] Furthermore, the horizontal width of the raised annulus located within the inner ring of the sealing ring body is 1 / 6 to 1 / 4 of the horizontal width of the sealing ring body.

[0012] Furthermore, the thickness of the raised annulus located in the inner ring of the sealing ring body is 1 / 6 to 1 / 4 of the thickness of the sealing ring body.

[0013] Furthermore, the width of the groove is 1 / 8 to 1 / 5 of the horizontal width of the sealing ring body.

[0014] A filter sealing structure with a self-locking sealing ring, the filter sealing structure including the self-locking sealing ring as described in any one of claims 1-8, further including a filter base, a filter element and a central tube, the central tube being installed on the filter base, the filter element being sleeved outside the central tube, the lower end of the filter element being provided with a filter element end cap, the lower part of the filter element end cap being connected to a cover plate by a snap fastener, and the self-locking sealing ring being installed in the space area formed between the filter element end cap and the cover plate.

[0015] Furthermore, the lower end of the central tube is screwed onto the filter base.

[0016] The specific principle is as follows: During assembly, the filter element is installed onto the filter base via the threaded installation of the central tube. Then, the filter element is slipped onto the central tube from top to bottom. When the sealing arc surface begins to contact the central tube, the sealing arc surface begins to be squeezed and deformed, and is compressed towards the U-shaped groove. The sealing arc surface begins to squeeze the end face of the filter element. Due to friction, the sealing ring begins to move upward. When the sealing arc surface contacts and squeezes the central tube, the same principle applies. A seal is formed initially on both the central tube and the end cap of the filter element. The sealing arc surface forms a seal with the filter base, while the U-shaped groove will deform, but the inner wall has almost no contact. This makes it easier to assemble than a sealing ring without a U-shaped groove.

[0017] During operation, when the filter element is installed and filtration begins, high-pressure liquid flows from the gap between the filter element end cap and the central tube, as well as the gap between the filter seat and the cover plate, onto the upper and lower end faces of the sealing ring. Since the upper end face is sealed at the sealing arc, and the U-shaped groove only deforms without any inner wall contact pressure, the high-pressure liquid flows into the U-shaped groove, generating a large pressure that squeezes the sealing arc towards the central tube and the sealing arc towards the filter element end cap, increasing the contact pressure of the seal and improving the sealing performance to form a self-locking mechanism. The same working principle also occurs on the lower end face of the sealing ring.

[0018] During disassembly, there is no high-pressure liquid on the upper and lower end faces of the sealing ring. Some liquid will remain in the U-shaped groove, but without the high pressure during operation, it will not have a reinforcing self-locking effect on the sealing arc surface. The U-shaped groove will return to its initial installation state. The force required for disassembly is basically the same as that for assembly. There is no difficulty in disassembly, and it is relatively easy to operate.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. Easy to install and maintain: Existing sealing rings have relatively high installation resistance during installation. The U-shaped groove of this invention helps to reduce the friction generated during assembly and facilitates installation.

[0021] 2. Enhanced sealing performance: The oil pressure flowing from the liquid filter chamber to the sealing ring cross-section acts on the U-shaped groove wall, increasing the contact pressure between the sealing position of the sealing ring and the mating parts, making the sealing performance at that point more reliable during operation and forming a self-locking function;

[0022] 3. Stable structure: The structure adopts a symmetrical design, which makes the overall structure more stable and will not cause uneven stress that could lead to loss or weakening of sealing performance;

[0023] 4. Material saving: This design incorporates a U-shaped trough structure, saving material between the two U-shaped troughs;

[0024] 5. Flexible and versatile design: The self-locking sealing ring design can be used in different applications. As long as there is high pressure from the liquid, it can enter the sealing ring and perform the self-locking function. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the self-locking sealing ring installation structure of the present invention;

[0026] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0027] In the diagram: 100-Filter element, 200-Filter element end cap, 300-Central tube, 400-Sealing ring body, 500-Cover plate, 600-Filter base, 401-Inner sealing arc surface, 402-Outer sealing arc surface, 403-U-shaped groove. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 , 2 A self-locking sealing ring for an automotive filter is installed in the automotive filter. The self-locking sealing ring includes an O-shaped sealing ring body 400. The inner and outer circumferential walls of the upper and lower ends of the sealing ring body 400 are provided with raised rings. The raised rings protrude outward along the radial direction of the sealing ring body 400 as sealing arc surfaces. The middle of the upper and lower ends of the sealing ring body 400 is provided with a groove along its axial direction, which is a U-shaped groove 403. The raised rings and the grooves at the upper and lower ends of the sealing ring body 400 are symmetrically arranged.

[0030] The raised ring (i.e., the inner sealing arc surface 401) located on the inner ring of the sealing ring body 400 is larger than the raised ring (i.e., the outer sealing arc surface 402) located on the outer ring of the sealing ring body 400. The upper and lower thicknesses of the raised ring located on the inner ring of the sealing ring body 400 are the same as the depth of the groove. The horizontal width of the raised ring located on the inner ring of the sealing ring body 400 is 1 / 6 to 1 / 4 of the horizontal width of the sealing ring body 400. The upper and lower thicknesses of the raised ring located on the inner ring of the sealing ring body 400 are 1 / 6 to 1 / 4 of the upper and lower thicknesses of the sealing ring body 400. The width of the groove is 1 / 8 to 1 / 5 of the horizontal width of the sealing ring body 400. The specific design is based on actual needs.

[0031] The sealing ring body 400 is installed in the automotive filter. The filter sealing structure includes a filter base 600, a filter element 100, and a central tube 300. The central tube 300 is installed on the filter base 600, and the filter element 100 is sleeved on the central tube 300. The lower end of the filter element is provided with a filter element end cap 200. The lower part of the filter element end cap 200 is connected to a cover plate 500 by a snap fastener. The self-locking sealing ring is installed in the space area formed between the filter element end cap 200 and the cover plate 500. The lower end of the central tube 300 is screwed onto the filter base 600.

[0032] During assembly, the filter element is installed onto the filter base 600 via the threaded installation of the central tube 300. Then, the filter element 100 is inserted into the central tube 300 from top to bottom. When the inner sealing arc surface 401 begins to contact the central tube 300, the sealing arc surface begins to be compressed and deformed, and is compressed towards the U-shaped groove. Meanwhile, the outer sealing arc surface 402 begins to press against the end face of the filter element. Due to friction, the sealing ring begins to move upward. When the inner sealing arc surface 401 contacts and presses against the central tube 300, the same principle applies. A seal is initially formed between the central tube 300 and the filter element end cap 200. The lower sealing arc surface forms a seal with the filter base 600. The U-shaped groove will deform, but the inner wall will not make much contact. This makes it easier to assemble than a sealing ring without a U-shaped groove.

[0033] During operation, when the filter element is installed and filtration begins, high-pressure liquid flows from the gap between the filter element end cap 200 and the central tube 300, and the gap between the filter seat 600 and the cover plate 500, onto the upper and lower end faces of the sealing ring. Since the upper end face is sealed at the sealing arc, and the U-shaped groove only deforms without any inner wall contact pressure, the high-pressure liquid flows into the U-shaped groove, generating a large pressure that squeezes the sealing arc towards the central tube 300 and the sealing arc towards the filter element end cap 200, increasing the contact pressure of the seal and improving the sealing performance to form a self-locking mechanism. The same working principle also occurs on the lower end face of the sealing ring.

[0034] During disassembly, there is no high-pressure liquid on the upper and lower end faces of the sealing ring. Some liquid will remain in the U-shaped groove, but without the high pressure during operation, it will not have a reinforcing self-locking effect on the sealing arc surface. The U-shaped groove will return to its initial installation state. The force required for disassembly is basically the same as that for assembly. There is no difficulty in disassembly, and it is relatively easy to operate.

[0035] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A self-locking sealing ring for an automotive filter, installed in the automotive filter, characterized in that, The self-locking sealing ring includes an O-shaped sealing ring body. The inner and outer circumferential walls at the upper and lower ends of the sealing ring body are provided with raised rings. The raised rings protrude outward along the radial direction of the sealing ring body as a sealing arc surface. The middle of the upper and lower ends of the sealing ring body is provided with a groove along its axial direction. The thickness of the raised ring located on the inner ring of the sealing ring body is the same as the depth of the groove; During assembly, the filter element is installed onto the filter base via the central tube. Then, the filter element is fitted into the central tube. When the sealing arc surface begins to contact the central tube, it is compressed and deformed, and then compressed in the direction of the groove. The sealing arc surface also begins to press against the filter element end cap. Due to friction, the sealing ring begins to move. When the sealing arc surface contacts and presses against the central tube, a seal is formed at both the central tube and the filter element end cap. The sealing arc surface also forms a seal with the filter base. The groove will deform, but the inner wall will not be in contact, making assembly easy.

2. The self-locking sealing ring for an automotive filter according to claim 1, characterized in that, The raised rings and grooves at the upper and lower ends of the sealing ring body are symmetrically arranged.

3. The self-locking sealing ring for an automotive filter according to claim 2, characterized in that, The slot is a U-shaped slot.

4. A self-locking sealing ring for an automotive filter according to claim 1, characterized in that, The size of the raised ring located on the inner ring of the sealing ring body is larger than that of the raised ring located on the outer ring of the sealing ring body.

5. A self-locking sealing ring for an automotive filter according to claim 4, characterized in that, The horizontal width of the raised ring located in the inner ring of the sealing ring body is 1 / 6 to 1 / 4 of the horizontal width of the sealing ring body.

6. A self-locking sealing ring for an automotive filter according to claim 4, characterized in that, The thickness of the raised annulus located on the inner ring of the sealing ring body is 1 / 6 to 1 / 4 of the thickness of the sealing ring body.

7. A self-locking sealing ring for an automotive filter according to claim 4, characterized in that, The width of the slot is 1 / 8 to 1 / 5 of the horizontal width of the sealing ring body.

8. A filter sealing structure with a self-locking sealing ring, characterized in that, The filter sealing structure includes a self-locking sealing ring as described in any one of claims 1-7, and further includes a filter base, a filter element, and a central tube. The central tube is installed on the filter base, the filter element is sleeved outside the central tube, the lower end of the filter element is provided with a filter element end cap, the lower part of the filter element end cap is connected to a cover plate by a snap fastener, and the self-locking sealing ring is installed in the space area formed between the filter element end cap and the cover plate.

9. A filter sealing structure with a self-locking sealing ring according to claim 8, characterized in that, The lower end of the central tube is screwed onto the filter base.

Images