A multi-lip sealing structure

Abstract

This utility model relates to the field of sealing accessories technology, specifically disclosing a multi-lip seal structure sleeved on the shafts at both ends of a rotor. The multi-lip seal structure includes a shaft seat and a coaxially embedded collar within the shaft seat. A sealing assembly is disposed within the collar, and the sealing assembly includes multiple symmetrically arranged first and second sealing rings, each with a lip extending outward from its center. This utility model provides a multi-lip seal that, when used with nitrogen filling, ensures a sealing effect, while employing an embedded integrated structure to improve assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sealing accessories technology, specifically a multi-lip sealing structure. Background Technology

[0002] Common vacuum pumps, such as screw vacuum pumps, are used in semiconductor, lithium battery, photovoltaic, steel, chemical, petroleum, light industry, pharmaceutical and food industries. They use an internal screw rotor to achieve air extraction. To achieve sealing, a sealing element needs to be installed on the shaft of the screw rotor. For example, a large-size lip seal assembly tooling disclosed in patent number CN221232469U includes a lip seal and a lip seal seat. The lip seal is fitted onto the inner side wall of the upper part of the lip seal seat. It also includes a support platform, positioning kit, shoulder, pressing workpiece and lip seal seat. This type of lip seal structure requires multiple parts to assemble, the assembly process is relatively cumbersome, and the sealing effect is limited. Utility Model Content

[0003] The purpose of this invention is to provide a multi-lip sealing structure to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a multi-lip sealing structure is sleeved on the shafts at both ends of a rotor. The multi-lip sealing structure includes a shaft seat and a collar coaxially embedded in the shaft seat. A sealing component is provided inside the collar. The sealing component includes a plurality of symmetrically arranged first sealing rings and second sealing rings. The first sealing rings and second sealing rings have lips extending outward from their middle portions.

[0005] Furthermore, the sealing assembly also includes a main partition and a secondary partition, with two first sealing rings symmetrically arranged on opposite sides of the main partition, one side of the secondary partition being fitted to the outside of the first sealing ring, and the second sealing ring being fitted to the other side of the secondary partition.

[0006] Furthermore, the lips on both sides of the main partition face opposite directions.

[0007] Furthermore, the lip on the second sealing ring extends to the outside of the collar, and the lip on the first sealing ring extends to the outside of the sub-partition.

[0008] Furthermore, the bearing seat is provided with a vent hole, which penetrates the bearing seat, the collar and the main partition plate. The vent hole is used to fill gas, and the gas passes between the two first sealing rings.

[0009] This utility model has the following beneficial effects:

[0010] This invention provides a multi-lip seal combined with nitrogen filling to ensure sealing effect, and adopts an embedded integrated structure to improve assembly efficiency. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the multi-lip sealing structure of Example 1;

[0013] Figure 2 for Figure 1 A cross-sectional schematic diagram;

[0014] Figure 3 for Figure 1 A schematic diagram of the explosion state. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1

[0017] like Figures 1-3 As shown, the multi-lip sealing structure in this embodiment is sleeved on the shafts at both ends of the rotor. The multi-lip sealing structure includes a shaft seat 10 and a collar 20 coaxially embedded in the shaft seat 10. A sealing assembly is provided in the collar 20. The sealing assembly includes a plurality of symmetrically arranged first sealing rings 31 and second sealing rings 32. The first sealing rings 31 and second sealing rings 32 have a lip 301 extending outward from the middle of their respective parts.

[0018] Here, the sealing assembly also includes a main partition 33 and a secondary partition 34. Two first sealing rings 31 are symmetrically arranged on opposite sides of the main partition 33. One side of the secondary partition 34 is attached to the outside of the first sealing ring 31, and the second sealing ring 32 is attached to the other side of the secondary partition 34. The lips 301 on both sides of the main partition 33 face opposite directions.

[0019] Additionally, the lip 301 on the second sealing ring 32 extends to the outside of the collar 20, but does not exceed the shaft seat 10, and the lip 301 on the first sealing ring 31 extends to the outside of the secondary partition 34. The main partition 33, the collar 20, and the secondary partition 34 are all generally annular structures.

[0020] Meanwhile, a vent hole 11 is provided on the bearing seat 10. The vent hole 11 passes through the bearing seat 10, the collar 20 and the main partition 33. The vent hole 11 is used to fill gas. The gas passes between the two first sealing rings 31 to provide further isolation and sealing. The gas can be an inert gas such as nitrogen.

[0021] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-lip seal structure, which is fitted on a shaft body at both ends of a rotor, characterized in that, The multi-lip sealing structure includes a shaft seat and a coaxially embedded collar inside the shaft seat. A sealing assembly is provided inside the collar. The sealing assembly includes a plurality of symmetrically arranged first sealing rings and second sealing rings, with a lip extending outward from the middle of the first sealing ring and the second sealing ring.

2. A multi-lip seal structure according to claim 1, wherein: The sealing assembly also includes a main partition and a secondary partition. Two first sealing rings are symmetrically arranged on opposite sides of the main partition. One side of the secondary partition is fitted to the outside of the first sealing ring, and the second sealing ring is fitted to the other side of the secondary partition.

3. A multi-lip seal structure according to claim 2, wherein: The lips on both sides of the main partition face opposite directions.

4. A multi-lip seal structure according to claim 2, wherein: The lip of the second sealing ring extends to the outside of the collar, and the lip of the first sealing ring extends to the outside of the secondary partition.

5. A multi-lip seal structure according to claim 2, wherein: The bearing seat is provided with a vent hole, which passes through the bearing seat, the collar and the main partition plate. The vent hole is used to fill gas, and the gas passes between the two first sealing rings.

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