O-shaped sealing ring

Abstract

The utility model relates to an O-shaped sealing ring, and belongs to the technical field of sealing washs.The O-shaped sealing ring is provided with an annular base body with the rectangular section, annular grooves are formed in the front end face and the rear end face of the base body respectively, the section of each groove is in the shape of a trapezoid with a narrow opening and a wide bottom, and a plurality of connecting plates are evenly distributed in each groove at intervals; one end of the connecting plate is fixedly connected with one side face of the groove, and the other end of the connecting plate is fixedly connected with the other side face of the groove. According to the O-shaped sealing ring with the good sealing effect, the good sealing effect can be provided under the condition of vibration or angular displacement of the front sealing contact face and the rear sealing contact face.

Description

Technical Field

[0001] This application relates to the technical field of sealing rings, and in particular to an O-ring. Background Technology

[0002] An O-ring is an annular cover composed of one or more parts, fixed to one of the bearing rings or washers and contacting or forming a narrow labyrinth gap with another ring or washer to prevent lubricating oil leakage and foreign object intrusion. Compared with other types of O-rings, O-rings have the following advantages: 1. Suitable for various sealing forms: static sealing, dynamic sealing, suitable for various materials and applications, with standardized dimensions and grooves, and strong interchangeability; 2. Suitable for various motion modes: rotary motion, axial reciprocating motion, or combined motion; 3. Suitable for various sealing media: oil, water, gas, chemical media, or other mixed media. By selecting appropriate rubber materials and designing suitable formulations, effective sealing of oil, water, air, gas, and various chemical media can be achieved; 4. Simple design, compact structure, easy installation and disassembly. The cross-sectional structure of the O-ring is extremely simple, and it has a self-sealing effect, ensuring reliable sealing performance.

[0003] Existing technology, such as invention patent publication number CN101825177A, discloses a sealing ring. This sealing ring has an annular base with an O-shaped cross-section. Annular grooves are formed on the front and rear ends of the annular base. The grooves have a trapezoidal cross-section, narrower at the opening and wider at the bottom. During use, when gas leaks from the high-pressure side of the sealing ring to the low-pressure side, the sealing ring base material expands outward and presses more tightly against the contact surface. The greater the internal pressure, the greater the pressure of the sealing ring base material against the contact surface, thus ensuring a better sealing effect.

[0004] Regarding the aforementioned technologies, the inventors discovered that when the front and rear sealing contact surfaces experience vibration, friction, or angular tilt, the annular grooves at the front and rear ends of the sealing ring are prone to radial displacement, which reduces the sealing effect. Utility Model Content

[0005] To achieve a good sealing effect on the front and rear sealing contact surfaces under vibration or angular displacement, this application provides an O-ring seal, employing the following technical solution:

[0006] An O-ring has a rectangular annular base with annular grooves on its front and rear ends. The grooves are trapezoidal in shape with a narrow opening and a wide bottom. Multiple connecting plates are evenly spaced inside the grooves. One end of each connecting plate is fixedly connected to one side wall of the groove, and the other end of each connecting plate is fixedly connected to the other side wall of the groove.

[0007] By adopting the above technical solution, the front and rear ends of the sealing ring are pressed onto the two sealing contact surfaces that need to be sealed, and the groove forms a closed cavity with the sealing contact surface. When gas leaks from the high-pressure side to the low-pressure side, it first enters the groove to form the closed cavity. As the amount of gas in the closed cavity increases, the pressure inside also increases. Because it is a trapezoidal structure, the pressure generated by the pressure acts on the two sides of the trapezoid, and the vertical component of the force generated makes the sealing ring base material adhere more tightly to the contact surface, thus improving the sealing effect.

[0008] Multiple connecting plates are evenly spaced within the groove. These connecting plates restrict the state of the groove, especially when there is vibration, friction, or angular tilt on the front and rear sealing contact surfaces, preventing changes in the groove's shape and improving the sealing effect. Furthermore, during the process of high-pressure gas leaking into the sealing cavity, the pressure at the leak point in the sealing cavity will increase sharply, and the resulting impact will affect the entire sidewall of the sealing cavity. The connecting plates can absorb the impact, preventing further leakage and improving the sealing effect.

[0009] Optionally, an elastic element is provided between adjacent connecting plates, the elastic element comprising:

[0010] The elastic substrate has two, and the two elastic substrates are arranged relatively apart, and the two elastic substrates form an elliptical cross-section with arched portions on both sides.

[0011] An elastic connecting plate is used to connect the ends of two adjacent elastic substrates on the same side.

[0012] By adopting the above technical solution, when the pressure at the leakage point of the sealing cavity increases sharply and impacts the connecting plate, the elastic element fixedly embedded between adjacent connecting plates can further absorb the impact, reducing damage to the connecting plate. More specifically, the protruding part can first contact and buffer the external pressure, evenly distributing the pressure to the surrounding area and avoiding local pressure concentration that could damage the sealing ring; at the same time, the relatively spaced elastic base plates form a stable buffer structure that can work together to cope with external pressure impacts from both sides.

[0013] Furthermore, when there is impact, vibration, or angle change at the front and rear sealing contact surfaces, the cross-sectional shape of the groove will change. The cross-sectional deformation will cause the spacing between the connecting plates to change. The elastic element can provide a force to restore the spacing, which is beneficial to maintaining the state of the groove and thus improving the sealing effect.

[0014] Optionally, the elastic element further includes:

[0015] The elastic fixing plate has one end fixedly connected to the outside of the elastic substrate, and the other end extends away from the elastic substrate. The end away from the elastic substrate has a bent portion. The connecting plate has a fixing groove corresponding to the elastic fixing plate, and the elastic fixing plate 43 can be inserted into the fixing groove 46.

[0016] By adopting the above technical solution, the elastic fixing plate and the fixing groove are connected in a one-to-one manner to achieve the connection effect between the elastic element and the connecting plate.

[0017] Optionally, the elastic element further includes:

[0018] Multiple elastic limiting plates are staggered between two elastic substrates. One end of one elastic limiting plate is fixedly connected to one elastic substrate, and one end of another adjacent elastic limiting plate is fixedly connected to another elastic substrate. The other end of the elastic limiting plate is suspended and parallel to the elastic connecting plate.

[0019] By adopting the above technical solution, the elastic limiting plate is used to maintain the shape of the elastic component, preventing the possibility of excessive compression and plastic deformation of the elastic substrate on the opposite side under large impact; this helps to improve the service life of the elastic component.

[0020] Optionally, the length of the elastic limiting plate is greater than the length of the elastic connecting plate.

[0021] By adopting the above technical solution, the length of the elastic limiting plate is longer than that of the elastic connecting plate. This ensures that when the elastic substrate is compressed to its limit, the elastic limiting plate still has a central protrusion, thus maintaining the state of the elastic component and improving its service life.

[0022] Optionally, one side of the connecting plate is fixedly connected to one side wall of the groove via a first arc-shaped connecting part;

[0023] And / or, the other side of the connecting plate is fixedly connected to the other side wall of the groove via a second arc-shaped connecting part.

[0024] By adopting the above technical solution, the first arc-shaped connecting part and the second arc-shaped connecting part are extended connecting parts between the connecting plate and the side wall of the groove, which can more smoothly disperse stress and avoid the occurrence of stress concentration points when the sealing contact surface applies uneven pressure to the substrate.

[0025] Optionally, the outer surface of the substrate is provided with a sealing ring groove.

[0026] By adopting the above technical solution, the sealing ring groove provides space for elastic deformation on the inner surface of the sealing base ring. This space helps to maintain the sealing state and provides a certain buffering capacity for the sealing base ring.

[0027] Optionally, a sealing ring is embedded in the sealing ring groove.

[0028] By adopting the above technical solution, the sealing ring will have deformation when it is squeezed, and its own deformation is compensated by elastic deformation, thereby improving the sealing effect on the inner surface of the sealing base ring.

[0029] In summary, this application has at least the following beneficial effects:

[0030] 1. Multiple connecting plates are evenly spaced within the groove. These connecting plates are used to restrict the state of the groove, especially when there is vibration, friction, or angular tilt on the front and rear sealing contact surfaces, to prevent changes in the shape of the groove and improve the sealing effect. Furthermore, during the process of high-pressure gas leaking into the sealing cavity, the pressure at the leak point of the sealing cavity will increase sharply, and the resulting impact will impact the entire sidewall of the sealing cavity. The connecting plates can absorb the impact, preventing further leakage caused by the impact and improving the sealing effect.

[0031] 2. The first arc-shaped connecting part and the second arc-shaped connecting part are extended connecting parts between the connecting plate and the side wall of the groove, which can distribute stress more smoothly and avoid the occurrence of stress concentration points when the sealing contact surface applies uneven pressure to the substrate. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an O-ring seal.

[0033] Figure 2 This is a schematic diagram of a single-sided cross-section of an O-ring seal.

[0034] Figure 3 This is a front view schematic diagram of an elastic element.

[0035] Explanation of reference numerals in the attached drawings: 1. Base; 11. Sealing ring groove; 12. Sealing ring; 2. Groove; 3. Connecting plate; 31. First arc-shaped connecting part; 32. Second arc-shaped connecting part; 4. Elastic element; 41. Elastic base plate; 42. Elastic connecting plate; 43. Elastic fixing plate; 44. Elastic limiting plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the appendices in the embodiments of this utility model. Figure 1 - Appendix Figure 3The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] The first embodiment of this application discloses an O-ring seal. (See attached document.) Figure 1 and attached Figure 2 .

[0038] An O-ring seal has a rectangular annular base 1. Annular grooves 2 are formed on the front and rear ends of the base 1. The grooves 2 have a trapezoidal cross-section that is narrower at the opening and wider at the bottom. Multiple connecting plates 3 are evenly spaced within the grooves 2. The connecting plates 3 are integrally connected to the inner wall of the grooves 2. Elastic elements 4 are embedded between adjacent connecting plates 3. One side of a connecting plate 3 is integrally fixed to one side wall of the groove 2 via a first arc-shaped connecting part 31, and the other side of the connecting plate 3 is integrally fixed to the other side wall of the groove 2 via a second arc-shaped connecting part 32. A sealing ring groove 11 is provided on the outer surface of the base 1, and a sealing ring 12 is embedded within the sealing ring groove 11.

[0039] When high-pressure gas leaks into the low-pressure side, it first enters the groove 2, forming a closed cavity. As the amount of gas in the closed cavity increases, the pressure also increases. Because it is a trapezoidal structure, the pressure generated acts on the two sides of the trapezoid, and the vertical component of the force makes the sealing ring base material 1 fit more tightly with the contact surface. During the process of high-pressure gas leaking into the sealing cavity, the pressure at the leakage point of the sealing cavity will increase sharply, and the resulting impact will impact the entire sidewall of the sealing cavity. The connecting plate 3 can absorb the impact, preventing further leakage caused by the impact. Furthermore, the elastic element 4 fixedly embedded between adjacent connecting plates 3 can further absorb the impact, reducing the damage to the connecting plate 3 caused by the impact. In the case of vibration, friction, or angular tilt of the front and rear sealing contact surfaces, it prevents the shape of the groove 2 from changing, thus improving the sealing effect.

[0040] The first arc-shaped connecting part 31 and the second arc-shaped connecting part 32 are integral connecting parts extending between the connecting plate 3 and the side wall of the groove 2, which can more smoothly disperse stress and avoid the occurrence of stress concentration points when the sealing contact surface applies uneven pressure to the substrate 1.

[0041] The sealing ring groove 11 provides space for elastic deformation on the inner surface of the sealing base ring. This space helps to maintain the sealing state and provides a certain buffering capacity for the sealing base ring. When the sealing ring 12 is compressed, it will have deformation. Its own deformation is compensated by elastic deformation, thereby improving the sealing effect on the inner surface of the sealing base ring.

[0042] See attached document Figure 3 The elastic element 4 includes an elastic base plate 41, an elastic connecting plate 42, an elastic fixing plate 43, and an elastic limiting plate 44. Two elastic substrates 41 are provided, with the two elastic substrates 41 arranged at intervals relative to each other. The two elastic substrates 41 are elliptical in cross-section with arched portions on both sides. An elastic connecting plate 42 is used to connect the ends of two adjacent elastic substrates 41 on the same side. The elastic connecting plate 42 and the elastic substrate 41 are integrally formed. One end is fixedly connected to the outside of the elastic substrate 41, and the other end extends away from the elastic substrate 41. The end away from the elastic substrate 41 has a bent portion 45. A fixing groove 46 corresponding to the elastic fixing plate 43 is provided on the connecting plate 3, and the elastic fixing plate 43 can be inserted into the fixing groove 46. Multiple elastic limiting plates 44 are provided, staggered between the two elastic substrates 41. One end of one elastic limiting plate 44 is fixedly connected to one elastic substrate 41, and one end of another adjacent elastic limiting plate 44 is fixedly connected to another elastic substrate 41. The other end of the elastic limiting plate 44 is suspended and parallel to the elastic connecting plate 42. The length of the elastic limiting plate 44 is greater than the length of the elastic connecting plate 42.

[0043] The raised portion can make initial contact with and buffer external pressure, distributing the pressure evenly to the surrounding area and preventing localized pressure concentration that could damage the sealing ring. Simultaneously, the relatively spaced elastic base plates 41 form a stable buffer structure, which can collaboratively cope with external pressure impacts from both sides. Furthermore, when there is impact, vibration, or angle change at the front and rear sealing contact surfaces, the cross-sectional shape of the groove 2 will change. This cross-sectional deformation will cause a change in the spacing of the connecting plates 3. The elastic element 4 can provide a force to restore the spacing, which helps maintain the state of the groove 2 and thus improves the sealing effect.

[0044] The elastic limiting plate 44 is used to maintain the shape of the elastic element 4, preventing the elastic substrate 41 from being compressed too much to the opposite side and forming plastic deformation under a large impact; it helps to improve the service life of the elastic element 4; and, by limiting the length of the elastic limiting plate 44, when the elastic substrate 41 is compressed to the limit, the elastic limiting plate 44 can still have a central protrusion, ensuring the maintenance of the state of the elastic element 4 and improving the service life of the elastic element 4.

[0045] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. An O-ring seal having a rectangular cross-section annular base (1), characterized in that, The front and rear ends of the substrate (1) are respectively provided with annular grooves (2). The cross-sectional shape of the groove (2) is a trapezoid with a narrow opening and a wide bottom. Multiple connecting plates (3) are evenly spaced in the groove (2). One end of the connecting plate (3) is fixedly connected to one side wall of the groove (2), and the other end of the connecting plate (3) is fixedly connected to the other side wall of the groove (2).

2. An O-ring according to claim 1, characterized in that, An elastic element (4) is provided between adjacent connecting plates (3), the elastic element (4) comprising: The elastic substrate (41) has two, and the two elastic substrates (41) are arranged at intervals relative to each other, and the two elastic substrates (41) form an elliptical cross-section with arched portions on both sides. The elastic connecting plate (42) is used to connect the ends of two adjacent elastic substrates (41) on the same side.

3. An O-ring according to claim 2, characterized in that, The elastic element (4) also includes: The elastic fixing plate (43) has one end fixedly connected to the outside of the elastic substrate (41), and the other end extends away from the elastic substrate (41). The end away from the elastic substrate (41) has a bent part (45). The connecting plate (3) has a fixing groove (46) corresponding to the elastic fixing plate (43), and the elastic fixing plate (43) can be inserted into the fixing groove (46).

4. An O-ring according to claim 2, characterized in that, The elastic element (4) also includes: Multiple elastic limiting plates (44) are staggered between two elastic substrates (41). One end of one elastic limiting plate (44) is fixedly connected to one elastic substrate (41), and one end of the adjacent elastic limiting plate (44) is fixedly connected to the other elastic substrate (41). The other end of the elastic limiting plate (44) is suspended and parallel to the elastic connecting plate (42).

5. An O-ring according to claim 4, characterized in that, The length of the elastic limiting plate (44) is greater than the length of the elastic connecting plate (42).

6. An O-ring according to claim 1, characterized in that, One side of the connecting plate (3) is fixedly connected to one side wall of the groove (2) through the first arc-shaped connecting part (31); And / or, the other side of the connecting plate (3) is fixedly connected to the other side wall of the groove (2) through the second arc-shaped connecting part (32).

7. An O-ring according to claim 1, characterized in that, The outer surface of the substrate (1) is provided with a sealing ring groove (11).

8. An O-ring according to claim 7, characterized in that, A sealing ring (12) is embedded in the sealing ring groove (11).

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