High-elasticity shaft seal rubber sealing ring

Abstract

The high-elasticity shaft seal rubber sealing ring comprises a sealing ring body, the sealing ring body comprises an inner ring, the upper end and the lower end of the inner ring are provided with an upper lip and a lower lip respectively, the upper lip and the lower lip are of the same structure, an extrusion cavity is formed in the upper lip, reinforcing pieces are arranged in the extrusion cavity, and a metal framework is arranged in the inner ring among the reinforcing pieces. The sealing ring has the advantages that the combined structure that the reinforcing pieces and the extrusion cavities are arranged in the upper lip and the lower lip is adopted, enough supporting force and stable pressure are provided when the sealing ring receives extrusion force, the sealing ring is prevented from deforming under the pressed condition, the sealing effect is guaranteed, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of seal ring structures, and specifically relates to a high-elasticity shaft seal rubber seal ring. Background Technique

[0002] The function of the shaft seal device is to solve the sealing device for the gap between the rotor and the pump casing at the part where the pump shaft extends out of the pump casing. The seal at the suction end of the water pump is used to prevent air from leaking in and destroying the vacuum, which affects water absorption. The seal at the discharge end can prevent high-pressure water from leaking out. The shaft seal device can be divided into a stuffing box seal and a mechanical seal according to the use environment. Among them, the mechanical seal device is a stuffing-free end face seal device that restricts the leakage of working fluid along the rotating shaft. It mainly consists of a stationary ring, a rotating ring, an elastic element, a transmission element, an auxiliary seal ring, etc. Auxiliary seal rings are used between the stationary ring and the seal gland, between the rotating ring and the rotating shaft, and between the seal gland and the housing to solve the sealing problem of leakage points.

[0003] The existing shaft seal rings usually adopt metal labyrinth seals. After long-term use, they are severely worn, resulting in insufficient elasticity and deformation, affecting the sealing effect. Moreover, the metal labyrinth seals have a large axial dimension, which is not convenient for installation and maintenance operations. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-elasticity shaft seal rubber seal ring to solve the problems of severe wear of the metal labyrinth seal after long-term use, resulting in insufficient elasticity and deformation, affecting the sealing effect, and the large axial dimension of the metal labyrinth seal, which is not convenient for installation and maintenance operations as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-elasticity shaft seal rubber seal ring provided by the utility model includes a seal ring body. The seal ring body includes an inner ring. Upper lips and lower lips are respectively arranged at the upper and lower ends of the inner ring. The upper lips and the lower lips have the same structure. An extrusion cavity is opened in the upper lip. A reinforcing member is arranged in the extrusion cavity. A metal skeleton is arranged in the inner ring between multiple reinforcing members.

[0007] Further, the outer side wall of the upper lip is a sealing surface, and multiple extrusion grooves and pressure relief holes are opened on the sealing surface.

[0008] Further, multiple extrusion cavities are equidistantly arranged in a circular shape with the upper lip as the center, and the extrusion cavities are communicated with the pressure relief holes.

[0009] Further, multiple reinforcing members include compression springs, and fixed gaskets are arranged at both ends of the compression springs.

[0010] Further, the fixed gasket is fixedly connected to the inner wall of the extrusion cavity.

[0011] Further, an arc transition is provided between the inner ring and the upper lip and the lower lip.

[0012] Further, the metal skeleton is annular and embedded in the inner ring.

[0013] Beneficial effects: A high-elasticity shaft seal rubber sealing ring adopts a combined structure of arranging reinforcing members and an extrusion cavity in the upper lip and the lower lip, realizing that the sealing ring provides sufficient supporting force and stable pressure when receiving extrusion force, preventing the sealing ring from deforming under pressure, ensuring the sealing effect and prolonging the service life. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 is a cross-sectional view of the upper lip structure of the present invention;

[0016] Figure 3 is a cross-sectional view of the reinforcing member structure of the present invention

[0017] Figure 4 is a cross-sectional view of the inner ring structure of the present invention.

[0018] Reference Signs

[0019] 1 - inner ring, 2 - upper lip, 3 - lower lip, 4 - extrusion cavity, 5 - reinforcing member, 51 - compression spring, 52 - fixed gasket, 6 - metal skeleton, 7 - sealing surface, 8 - extrusion groove, 9 - pressure relief hole. Detailed Embodiments

[0020] The following are specific embodiments of the present invention in combination with the drawings, and the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0021] Embodiment

[0022] As Figures 1-4 shown, a high-elasticity shaft seal rubber sealing ring includes a sealing ring body. The sealing ring body includes an inner ring 1. Upper and lower ends of the inner ring 1 are respectively provided with an upper lip 2 and a lower lip 3. The upper lip 2 and the lower lip 3 have the same structure. An extrusion cavity 4 is formed in the upper lip 2. A reinforcing member 5 is arranged in the extrusion cavity 4. A metal skeleton 6 is arranged in the inner ring 1 between multiple reinforcing members 5.

[0023] Embodiment 1: The outer wall of the upper lip 2 is a sealing surface 7. A plurality of extrusion grooves 8 and pressure relief holes 9 are formed in the sealing surface 7. The sealing surface 7 is squeezed with the stationary ring, outer ring or sealing gland of the shaft seal device through the extrusion grooves 8 to achieve the sealing effect. A plurality of extrusion cavities 4 are arranged equidistantly with the upper lip 2 as a circle. The extrusion cavities 4 are communicated with the pressure relief holes 9. A plurality of reinforcement members 5 include compression springs 51. Fixed gaskets 52 are provided at both ends of the compression springs 51. The fixed gaskets 52 are fixedly connected to the inner wall of the extrusion cavity 4. When the dental tray spring 51 receives an extrusion force, it contracts, and the air in the extrusion cavity 4 is discharged through the pressure relief holes 9, achieving sealing while maintaining stable pressure.

[0024] Embodiment 2: There is an arc transition between the inner ring 1 and the upper lip 2 and the lower lip 3. The upper lip 2 and the lower lip 3 respectively seal two connecting parts of the shaft seal device and are connected through the inner ring 1. The metal skeleton 6 is in a ring shape and is embedded in the inner ring 1, and is supported by the metal skeleton 6 in the inner ring 1 to prevent the sealing ring from deforming.

[0025] In the present utility model, two parts of the shaft seal device are connected through the upper lip 2 and the lower lip 3 to achieve the sealing effect. When the sealing ring body is squeezed, it is squeezed inward by the compression spring 51 in the reinforcement member 5. After the extrusion cavity 4 and the pressure relief hole 9 are communicated, the compressed gas is discharged, achieving stable pressure and maintaining sealing. Different degrees of pressure are satisfied through a plurality of reinforcement members 5, preventing the sealing ring body from deforming during use and affecting the sealing effect.

[0026] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-elasticity shaft seal rubber sealing ring, comprising a sealing ring body, characterized in that: The sealing ring body includes an inner ring (1), upper and lower lips (2) and (3) are respectively arranged at the upper and lower ends of the inner ring (1), the upper lip (2) and the lower lip (3) have the same structure, an extrusion cavity (4) is formed in the upper lip (2), a reinforcement member (5) is arranged in the extrusion cavity (4), and a metal skeleton (6) is arranged in the inner ring (1) between multiple reinforcement members (5).

2. The high-elasticity shaft seal rubber sealing ring according to claim 1, characterized in that: The outer side wall of the upper lip (2) is a sealing surface (7), and multiple extrusion grooves (8) and pressure relief holes (9) are formed in the sealing surface (7).

3. The high-elasticity shaft seal rubber sealing ring according to claim 2, characterized in that: Multiple extrusion cavities (4) are arranged equidistantly in a circular shape with the upper lip (2) as the center, and the extrusion cavities (4) are communicated with the pressure relief holes (9).

4. A high-elasticity shaft seal rubber sealing ring according to claim 1, characterized in that: Multiple reinforcement members (5) include compression springs (51), and fixing gaskets (52) are arranged at both ends of the compression springs (51).

5. A high-elasticity shaft seal rubber sealing ring according to claim 4, characterized in that: The fixing gasket (52) is fixedly connected to the inner wall of the extrusion cavity (4).

6. The high-elastic shaft seal rubber sealing ring according to claim 1, characterized in that: An arc transition is provided between the inner ring (1) and the upper lip (2) and the lower lip (3).

7. A high-elasticity shaft seal rubber sealing ring according to claim 1, characterized in that: The metal skeleton (6) is in a ring shape and is embedded in the inner ring (1).

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