Sealing ring applied to high-pressure environment

Abstract

The utility model relates to a sealing ring applied to a high-pressure environment, and belongs to the technical field of sealing. The sealing ring comprises a sealing ring body, and the sealing ring is a closed circular ring; a first containing groove is formed in one end, in the axis direction, of the sealing ring, the first containing groove and the sealing ring are coaxially arranged, and a first O-shaped ring is arranged in the first containing groove. A second containing groove is coaxially formed in the peripheral face of the sealing ring, and a second O-shaped ring is arranged in the second containing groove. A sealing cavity is formed in the side, away from the axis of the sealing ring, in the first containing groove, and high-pressure gas can enter the sealing cavity. The wear-resistant sealing ring has the wear-resistant and sealing effects under the high-pressure condition.

Description

TECHNICAL FIELD

[0001] The application relates to the field of high-pressure sealing technology, in particular to a sealing ring applied to a high-pressure environment. BACKGROUND

[0002] In a high-pressure environment, the inside of an electric machine needs to maintain a certain pressure to ensure normal operation, and a high-pressure sealing ring needs to be installed between the rotating shaft of the electric machine and the sealing ring. The high-pressure sealing ring can help maintain the working pressure and prevent the pressure from dropping to affect the performance of the electric machine. The sealing ring is usually made of elastic materials such as rubber and silicone, which have good elasticity and resistance to oil, water, acid and alkali.

[0003] According to the related technology in the above, in a high-pressure environment, the sealing ring is worn after long-term use, resulting in a decrease in sealing performance, and the gas in the electric machine is prone to leak from the inner ring and the outer ring of the sealing ring. CONTENT OF THE UTILITY MODEL

[0004] In order to ensure that the sealing ring has wear resistance and sealing effect in a high-pressure environment, the application provides a sealing ring applied to a high-pressure environment.

[0005] The sealing ring applied to a high-pressure environment provided by the application adopts the following technical scheme:

[0006] A sealing ring applied to a high-pressure environment, comprising a sealing ring body, the sealing ring is a closed annular ring, the sealing ring is provided with a placing groove one at one end along the axial direction, the placing groove one is coaxial with the sealing ring, and an O-shaped ring one is arranged in the placing groove one, a placing groove two is coaxial with the outer circumferential surface of the sealing ring, an O-shaped ring two is arranged in the placing groove two, and the O-shaped ring two can abut against the groove bottom of the placing groove two and a sealing seat at the same time, and a sealing cavity is arranged in the placing groove one away from the axial side of the sealing ring, and high-pressure gas can enter the sealing cavity.

[0007] By adopting the above technical scheme, when the sealing ring is used for sealing, the inner ring of the sealing ring is tightly attached to the rotating shaft, the placing groove one is arranged at the position on the abutting piece, and a sealing cavity and an O-shaped ring one are further arranged in the placing groove one, and the sealing cavity is located at the side of the O-shaped ring one away from the axial line of the sealing ring. When the high-pressure gas in the electric machine enters the sealing cavity, the O-shaped ring one is extruded to move towards the axial direction of the sealing ring, so that the sealing ring extrudes the rotating shaft, and the sealing ring can realize self-tightening during operation, thereby improving the sealing effect. The position on the rotating shaft. At the same time, the placing groove two is arranged on the outer circumferential surface of the sealing ring to cooperate with the O-shaped ring two, so that the abutting mode between the sealing ring and the sealing seat is changed from surface contact to line contact, the abutting area during rotation is reduced, and the wear of the sealing ring is reduced, thereby prolonging the service life of the sealing ring.

[0008] Optionally, a convex rib is coaxially arranged on the inner circumferential surface of the sealing ring, the cross section of the convex rib is in a conical shape, and the tip of the convex rib is arranged towards the axis of the sealing ring.

[0009] By adopting the above technical scheme, the convex rib is arranged on the inner ring of the rotating shaft, the tip of the convex rib abuts against the rotating shaft, the abutting mode of the sealing ring and the rotating shaft is changed from surface contact to line contact, the abutting area during rotation is reduced, the wear of the sealing ring is reduced, and the service life of the sealing ring is prolonged.

[0010] Optionally, the convex rib comprises a front conical surface and a rear conical surface, the front conical surface is close to one end of the sealing ring in which the placing groove one is arranged, the included angle between the front conical surface and the inner circumferential surface of the sealing ring is greater than or equal to 17°, and the included angle between the rear conical surface and the inner circumferential surface of the sealing ring is greater than or equal to 15°.

[0011] By adopting the above technical scheme, the included angle between the front conical surface and the inner circumferential surface of the sealing ring is greater than the included angle between the rear conical surface and the inner circumferential surface of the sealing ring, the rear conical surface can provide stronger support when subjected to pressure, and the sealing effect is improved.

[0012] Optionally, the tip of the convex rib and the O-shaped ring one are in the same vertical plane.

[0013] By adopting the above technical scheme, the tip of the convex rib and the O-shaped ring one are in the same vertical plane, which ensures that the O-shaped ring one can better transmit force to the convex rib when being extruded and deformed, and enhances the radial sealing effect of the sealing ring.

[0014] Optionally, the placing groove two is arranged away from the placing groove one.

[0015] By adopting the above technical scheme, the placing groove two is arranged away from the placing groove one, which ensures that there is enough distance between the two O-shaped rings, avoids mutual interference therebetween, and thus guarantees the sealing effect.

[0016] Optionally, the depth of the placing groove one along the axis direction of the sealing ring is greater than the cross-sectional diameter of the O-shaped ring one.

[0017] By adopting the above technical scheme, the depth of the placing groove one is greater than the cross-sectional diameter of the O-shaped ring one, which can ensure that the O-shaped ring one can be completely embedded in the placing groove one and will not be extruded in a high-pressure environment, and thus guarantees the sealing effect.

[0018] Optionally, the width of the placing groove two is greater than the cross-sectional diameter of the O-shaped ring two, and the depth of the placing groove two is less than the cross-sectional diameter of the O-shaped ring two.

[0019] By adopting the technical scheme, the O-shaped ring two can be stably placed in the placing groove two, and when the O-shaped ring two is subjected to pressure, the O-shaped ring two can better fit the fitting surface, thereby improving the sealing effect.

[0020] Optionally, the sealing ring is provided with the annular boss coaxial with the one end of the placing groove one, and the annular boss is arranged at the position corresponding to the sealing cavity.

[0021] By adopting the technical scheme, the annular boss enhances the structural strength of the sealing ring, and also helps to position the sealing cavity, so that the high-pressure gas can accurately enter the sealing cavity. Meanwhile, the annular boss increases the thickness of the sealing ring along the axial direction at the position corresponding to the sealing cavity, so that the deformation allowance of the sealing cavity along the axial direction is reduced, and the expansion of the high-pressure gas along the radial direction of the sealing ring after entering the sealing cavity is effectively limited.

[0022] Optionally, the outer circumferential surface of the sealing ring and the connecting position of the sealing ring along the axial direction at both ends are respectively provided with chamfers; and the inner circumferential surface of the sealing ring and the connecting position of the sealing ring at which the placing groove one is not arranged are provided with chamfers.

[0023] By adopting the technical scheme, the chamfers effectively reduce the friction between the sealing ring and the fitting surface during installation, so that the installation is more smooth.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. The sealing ring body is in a closed annular shape, is sleeved on the rotating shaft of the motor, and cooperates with the sealing seat to form a sealing structure. The sealing ring is provided with a placing groove one at one end along the axial direction, and is internally provided with an O-shaped ring one and a sealing cavity. High-pressure gas enters the sealing cavity through the placing groove one, and the O-shaped ring one is extruded to move close to the axial direction of the sealing ring, so as to enhance the abutting tightness between the sealing ring and the rotating shaft. The high-pressure gas in the sealing cavity makes the sealing ring self-tight, and further improves the sealing effect.

[0026] 2. The inner circumferential surface of the sealing ring is provided with a convex rib with a tapered cross section, and the tapered tip points to the axial line of the sealing ring. The convex rib changes the contact mode between the sealing ring and the rotating shaft from surface contact to line contact, reduces the wear rate of the sealing ring, and prolongs the service life of the sealing ring. Meanwhile, the convex rib also increases the pressure at the contact position, and further enhances the sealing property.

[0027] 3. The included angle between the front tapered surface and the inner circumferential surface of the sealing ring is greater than the included angle between the rear tapered surface and the inner circumferential surface of the sealing ring. The rear tapered surface can provide stronger support when subjected to pressure, thereby improving the sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1is a structural schematic view of a sealing ring applied to a high-pressure environment according to an embodiment of the present application;

[0029] Figure 2 is a sectional view of a sealing ring applied to a high-pressure environment according to an embodiment of the present application.

[0030] Reference signs: 1, sealing ring; 11, placement groove one; 111, sealing cavity; 12, placement groove two; 13, convex rib; 131, front conical surface; 132, rear conical surface; 14, annular boss; 15, chamfer; 2, O-ring one; 3, O-ring two. DETAILED DESCRIPTION

[0031] The following will be described in detail with reference to the accompanying drawings. Figures 1-2 The present application will be described in further detail.

[0032] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connection", "fixed", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection, or communication; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0034] The present application discloses a sealing ring applied to a high-pressure environment. Referring to Figure 1 A sealing ring applied to a high-pressure environment includes a sealing ring 1 body, the sealing ring 1 body is in the form of a closed annular ring, the sealing ring 1 is arranged between the rotating shaft of the motor and the sealing seat, and sealing is realized in a high-pressure and high-speed rotating environment. The sealing ring 1 is made of polytetrafluoroethylene, which has certain elasticity and also has good high-pressure resistance, corrosion resistance and wear resistance, and can maintain stable sealing effect for a long time in a high-pressure environment.

[0035] ReferenceFigure 1 and 2 The sealing ring 1 is provided with a placing groove 11 coaxial with the axis at one end in the axial direction, the cross section of the placing groove 11 in the radial direction of the sealing ring 1 is rectangular, an O-ring 2 is installed in the placing groove 11, the depth of the placing groove 11 in the axial direction of the sealing ring 1 is greater than the cross section diameter of the O-ring 2, and the peripheral surface of the O-ring 2 abuts against the inner wall of the placing groove 11 when the O-ring 2 is installed. A sealing cavity 111 coaxial with the axis is provided in the placing groove 11, the sealing cavity 111 is located on the side of the placing groove 11 away from the axis of the sealing ring 1, one end of the sealing cavity 111 is flush with the groove bottom of the end of the placing groove 11 away from the sealing ring 1, and the width of the sealing cavity 111 in the axial direction of the sealing ring 1 is smaller than the width of the placing groove 11 in the axial direction of the sealing ring 1. The step surface formed by the sealing cavity 111 and the placing groove 11 abuts against the O-ring 2, thereby limiting the O-ring 2 in the placing groove 11. When the sealing ring 1 is used, the sealing ring 1 is sleeved on the rotating shaft of the motor for sealing, so that the end of the sealing ring 1 provided with the placing groove 11 is close to the motor. The high-pressure gas in the motor enters the sealing cavity 111 through the placing groove 11, and the high-pressure gas extrudes the O-ring 2 to be close to the axis of the sealing ring 1 due to the fact that the sealing cavity 111 is located on the side of the O-ring 2 away from the axis of the sealing ring 1. After being extruded, the O-ring continues to apply extrusion force to the inner axis of the sealing ring 1, so that the inner circumferential surface of the sealing ring 1 is better abutted against the outer circumferential surface of the rotating shaft. At the same time, the sealing cavity 111 enables the sealing ring 1 to be self-tightened during operation.

[0036] Reference Figure 1 and 2 The convex rib 13 is fixed on the inner circumferential surface of the sealing ring 1, the cross section of the convex rib 13 in the radial direction of the sealing ring 1 is conical, and the taper tip of the conical convex rib 13 extends and is provided in the direction close to the axis of the sealing ring 1. The convex rib 13 changes the surface contact between the sealing ring 1 and the rotating shaft into line contact, reduces the wear of the sealing ring 1, and prolongs the service life of the sealing ring 1. At the same time, the convex rib 13 reduces the abutment area between the sealing ring 1 and the rotating shaft during work, increases the pressure at the abutment position, and enhances the sealing performance of the sealing ring 1 and the rotating shaft. The taper tip of the convex rib 13 and the center of the cross section of the O-ring are in the same vertical plane, so that the convex rib 13 can better fit when the O-ring is extruded and transmitted to the sealing ring 1, thereby improving the sealing effect in the radial direction.

[0037] Reference Figure 1 and 2, the convex rib 13 includes a front taper surface 131 and a rear taper surface 132, the front taper surface 131 is provided with a placing groove one 11 near the sealing ring 1, the included angle between the front taper surface 131 and the inner circumferential surface of the sealing ring 1 is greater than or equal to 17°, the included angle between the rear taper surface 132 and the inner circumferential surface of the sealing ring 1 is greater than or equal to 15°, the design of the front taper surface 131 and the rear taper surface 132 helps to reduce the friction loss of the motor rotating shaft and the sealing ring while maintaining high-pressure sealing performance. The front taper surface 131 plays a guiding role, and the setting of the front taper surface 131 enables the sealing ring 1 to more easily enter the recess of the mating surface during installation. At the same time, the included angle between the front taper surface 131 and the inner circumferential surface of the sealing ring 1 is greater than the included angle between the rear taper surface 132 and the inner circumferential surface of the sealing ring 1, which can better fit the mating surface when subjected to pressure and improve the sealing effect.

[0038] Referring to Figure 1 and 2 , a placing groove two 12 is coaxially provided on the outer circumferential surface of the sealing ring 1, and the placing groove two 12 is arranged near the end of the sealing ring 1 where the placing groove one 11 is not provided. An O-ring two 3 is sleeved in the placing groove two 12, the depth of the placing groove two 12 is less than the cross-sectional diameter of the O-ring two 3, and the outer circumferential surface of the O-ring two 3 abuts against the sealing seat when the sealing ring 1 is sealed. At the same time, when the sealing ring 1 is sealed, the O-ring is extruded in the radial direction, and the cross section changes from a circle to an ellipse. The width of the placing groove two 12 is greater than the cross-sectional diameter of the O-ring two 3, leaving a margin for the deformation of the O-ring two 3. The setting of the placing groove two 12 enables the O-ring two 3 to be stably placed in the placing groove two 12, and when subjected to pressure, it can better fit the mating surface, improving the sealing effect of the sealing ring 1.

[0039] Referring to Figure 1 and 2 , one end of the sealing ring 1 provided with the placing groove one 11 is fixedly connected with an annular boss 14 coaxially, the outer circumferential surface of the annular boss 14 is flush with the outer circumferential surface of the sealing groove, the annular boss 14 is arranged at the position corresponding to the sealing cavity 111, the annular boss 14 increases the thickness of the sealing ring 1 in the axial direction at the position corresponding to the sealing cavity 111, enhances the structural strength of the sealing ring 1, reduces the deformation margin of the sealing cavity 111 in the axial direction, and effectively limits the expansion of high-pressure gas in the radial direction of the sealing ring 1 after entering the sealing cavity 111.

[0040] Referring to Figure 1 and 2 , chamfers 15 are respectively provided on the outer circumferential surface of the sealing ring 1 at the positions connecting the two ends of the sealing ring 1 in the axial direction, and on the inner circumferential surface of the sealing ring 1 at the positions connecting the end of the sealing ring 1 where the placing groove one 11 is not provided. The chamfers 15 play a guiding role, effectively reducing the friction between the sealing ring 1 and the mating surface during installation, making the installation more smooth.

[0041] The implementation principle of the sealing ring applied to a high-pressure environment according to an embodiment of the application is as follows: the sealing ring 1 is in a closed annular shape and is sleeved on a rotating shaft of a motor to form a sealing structure with a sealing seat. The sealing ring 1 is provided with a placing groove one 11 at one end in the axial direction, and is internally provided with an O-shaped ring one 2 and a sealing cavity 111. High-pressure gas enters the sealing cavity 111 through the placing groove one 11 to extrude the O-shaped ring one 2, so that the O-shaped ring one 2 is close to the axial direction of the sealing ring 1, and a convex rib 13 in the same vertical plane as the O-shaped ring one 2 is extruded synchronously, thereby enhancing the abutting tightness between the sealing ring 1 and the rotating shaft. The high-pressure gas in the sealing cavity 111 also enables the sealing ring 1 to be self-tightening, and further improves the sealing effect. Meanwhile, the convex rib 13 changes the surface contact between the sealing ring 1 and the rotating shaft into line contact, reduces the wear of the sealing ring 1, and increases the pressure at the abutting position, thereby enhancing the sealing property.

[0042] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A sealing ring for use in a high-pressure environment, comprising a sealing ring (1) body, wherein the sealing ring (1) is a closed circular ring, and is characterized in that: The sealing ring (1) is provided with a placement groove (11) at one end along the axial direction, the placement groove (11) is coaxially arranged with the sealing ring (1), and an O-ring (2) is arranged in the placement groove (11); a placement groove (12) is coaxially arranged on the outer peripheral surface of the sealing ring (1), an O-ring (3) is arranged in the placement groove (12), and the O-ring (3) can simultaneously abut against the bottom of the placement groove (12) and the sealing seat; a sealing cavity (111) is provided in the placement groove (11) on the side away from the axis of the sealing ring (1), and high-pressure gas can enter the sealing cavity (111).

2. The sealing ring for use in a high-pressure environment according to claim 1, characterized in that: A ridge (13) is coaxially arranged on the inner circumference of the sealing ring (1); the cross section of the ridge (13) is conical, and the tip of the ridge (13) is arranged toward the axis of the sealing ring (1).

3. The sealing ring for use in a high-pressure environment according to claim 2, characterized in that: The ridge (13) includes a front conical surface (131) and a rear conical surface (132), wherein the front conical surface (131) is close to one end of the sealing ring (1) where the placement groove (11) is provided, and the angle between the front conical surface (131) and the inner peripheral surface of the sealing ring (1) is greater than or equal to 17°; and the angle between the rear conical surface (132) and the inner peripheral surface of the sealing ring (1) is greater than or equal to 15°.

4. The sealing ring for use in a high-pressure environment according to claim 2, characterized in that: The conical tip of the ridge (13) and the O-ring (2) are in the same vertical plane.

5. The sealing ring for use in a high-pressure environment according to claim 1, characterized in that: The second placement groove (12) is opened away from the first placement groove (11).

6. The sealing ring for use in a high-pressure environment according to claim 1, characterized in that: The depth of the placement groove (11) along the axial direction of the sealing ring (1) is greater than the cross-sectional diameter of the O-ring (2).

7. The sealing ring for use in a high-pressure environment according to claim 1, characterized in that: The width of the second placement groove (12) is greater than the cross-sectional diameter of the second O-ring (3), and the depth of the second placement groove (12) is less than the cross-sectional diameter of the second O-ring (3).

8. The sealing ring for use in a high-pressure environment according to claim 1, characterized in that: The sealing ring (1) is provided with the placement groove (11), and an annular boss (14) is coaxially arranged at one end thereof. The annular boss (14) is arranged at a position corresponding to the sealing cavity (111).

9. The sealing ring for use in a high-pressure environment according to claim 1, characterized in that: The outer circumference of the sealing ring (1) and the connection positions of the two ends of the sealing ring (1) along the axial direction are respectively provided with chamfers (15); the inner circumference of the sealing ring (1) and the connection position of the end of the sealing ring (1) not provided with the placement groove (11) are respectively provided with chamfers (15).

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