Labyrinth type dynamic sealing structure for rotating mechanism

Abstract

The utility model relates to a labyrinth type dynamic sealing structure for a rotating mechanism. The sealing device comprises a sealing fixed side rubber body, an inner sealing ring first rubber body, an inner sealing ring first framework, a gasket, an outer sealing ring first rubber body, an outer sealing ring first framework, an inner sealing ring second rubber body, an inner sealing ring second framework, a labyrinth type sealing channel, an outer sealing ring second rubber body and an outer sealing ring second framework. The labyrinth type sealing channels comprise the first labyrinth type sealing channel, the second labyrinth type sealing channel, the third labyrinth type sealing channel and the fourth labyrinth type sealing channel. Due to the fact that the whole labyrinth type sealing channel is long, narrow and irregular, and the labyrinth type sealing channel is filled with the lubricating grease used for lubricating and sealing, the labyrinth type sealing structure has a good sealing effect on external dust, liquid and impurities, and effectively prevents external substances from entering a rotating mechanism through the sealing structure. And losses such as abnormal work and failure are brought to the rotating mechanism.

Description

Technical Field

[0001] This utility model belongs to the technical field of dynamic sealing structure. Specifically, this utility model discloses a labyrinth-type dynamic sealing structure for a rotating mechanism. Background Technology

[0002] Dynamic seals for rotating mechanisms have a wide range of applications and are used in various environments, such as high temperature and high humidity environments, and the surrounding media include liquids, dust, and impurities. The complex working environment and working media require dynamic seals to have a good sealing effect to prevent failure problems caused by poor sealing.

[0003] Currently, the commonly used dynamic sealing structure is a single-lip or multi-lip annular dynamic sealing structure. The sealing material is mostly rubber or PTFE. The rubber relies on the elasticity generated by the deformation of the rubber to make the rubber and the sealing surface fit tightly to achieve a seal. Usually, special grease is applied between the lips to reduce friction and improve the sealing effect. This sealing structure is widely used in reciprocating sealing applications because of its good wear resistance, simple structure and reliable sealing. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a labyrinth-type dynamic sealing structure for a rotating mechanism that has a good sealing effect against external dust, liquids and impurities.

[0005] According to the technical solution provided by this utility model, the rotating mechanism uses a labyrinth-type dynamic sealing structure, which includes a sealing and fixing side rubber body, an inner sealing ring first rubber body, an inner sealing ring first skeleton, a gasket, an outer sealing ring first rubber body, an outer sealing ring first skeleton, an inner sealing ring second rubber body, an inner sealing ring second skeleton, a labyrinth-type sealing channel, an outer sealing ring second rubber body and an outer sealing ring second skeleton, and the labyrinth-type sealing channel includes a labyrinth-type first sealing channel, a labyrinth-type second sealing channel, a labyrinth-type third sealing channel and a labyrinth-type fourth sealing channel;

[0006] A sealing and fixing side rubber body and an inner sealing ring first rubber body are provided outside the inner sealing ring first skeleton, an outer sealing ring first rubber body is provided outside the outer sealing ring first skeleton, an inner sealing ring second rubber body is provided outside the inner sealing ring second skeleton, and an outer sealing ring second rubber body is provided outside the outer sealing ring second skeleton.

[0007] The gasket and the outer sealing ring first rubber body are both located below the inner sealing ring first rubber body. Several sealing teeth are provided on the lower end face of the inner sealing ring first rubber body at the corresponding gasket position. A labyrinthine first sealing channel is provided between the inner sealing ring first rubber body and the outer sealing ring first rubber body, with the sealing teeth located outside the labyrinthine first sealing channel. The inner sealing ring second rubber body is located below the outer sealing ring first rubber body. A labyrinthine second sealing channel is provided between the inner sealing ring second rubber body and the outer sealing ring first rubber body. The outer sealing ring second rubber body is located below the inner sealing ring second rubber body. A labyrinthine third sealing channel is provided between the outer sealing ring second rubber body and the inner sealing ring second skeleton. A labyrinthine fourth sealing channel, labyrinthine third sealing channel, labyrinthine second sealing channel, and labyrinthine first sealing channel are sequentially connected to form the labyrinthine sealing channel.

[0008] Preferably, the first rubber body of the inner sealing ring is in contact with the second rubber body of the inner sealing ring.

[0009] Preferably, the first rubber body of the outer sealing ring is in contact with the second rubber body of the outer sealing ring and the second skeleton of the outer sealing ring.

[0010] Preferably, the inner circle of the first rubber body of the inner sealing ring is flush with the inner circle of the second rubber body of the inner sealing ring.

[0011] Preferably, the outer circle of the first rubber body of the outer sealing ring is flush with the outer circle of the second skeleton of the outer sealing ring.

[0012] This invention provides excellent sealing against external dust, liquids, and impurities, effectively preventing external substances from entering the rotating mechanism through the sealing structure and causing malfunctions or failures. Attached Figure Description

[0013] Figure 1 This is a diagram showing the usage state of this utility model.

[0014] Figure 2 yes Figure 1 Enlarged view of part A in the image. Detailed Implementation

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

[0016] A rotating mechanism using a labyrinth-type dynamic seal structure, such as Figure 1 and Figure 2 As shown, it includes a sealing and fixing side rubber body 1, an inner sealing ring first rubber body 2, an inner sealing ring first skeleton 3, a gasket 4, an outer sealing ring first rubber body 5, an outer sealing ring first skeleton 6, an inner sealing ring second rubber body 7, an inner sealing ring second skeleton 8, a labyrinth-type sealing channel 9, an outer sealing ring second rubber body 10, and an outer sealing ring second skeleton 11. The labyrinth-type sealing channel 9 includes a labyrinth-type first sealing channel 9.1, a labyrinth-type second sealing channel 9.2, a labyrinth-type third sealing channel 9.3, and a labyrinth-type fourth sealing channel 9.4.

[0017] A sealing and fixing side rubber body 1 and an inner sealing ring first rubber body 2 are provided outside the inner sealing ring first skeleton 3. Both the sealing and fixing side rubber body 1 and the inner sealing ring first rubber body 2 are bonded to the inner sealing ring first skeleton 3 by vulcanization and thermoforming. An outer sealing ring first rubber body 5 is provided outside the outer sealing ring first skeleton 6. The outer sealing ring first rubber body 5 is bonded to the outer sealing ring first skeleton 6 by vulcanization and thermoforming. An inner sealing ring second rubber body 7 is provided outside the inner sealing ring second skeleton 8. The inner sealing ring second rubber body 7 is bonded to the inner sealing ring second skeleton 8 by vulcanization and thermoforming. An outer sealing ring second rubber body 10 is provided outside the outer sealing ring second skeleton 11. The outer sealing ring second rubber body 10 is bonded to the outer sealing ring second skeleton 11 by vulcanization and thermoforming.

[0018] The gasket 4 and the outer sealing ring first rubber body 5 are both located below the inner sealing ring first rubber body 2. Several sealing teeth 2.1 are provided on the lower end face of the inner sealing ring first rubber body 2 at the position corresponding to the gasket 4. A labyrinthine first sealing channel 9.1 is provided between the inner sealing ring first rubber body 2 and the outer sealing ring first rubber body 5, with the sealing teeth 2.1 located outside the labyrinthine first sealing channel 9.1. The inner sealing ring second rubber body 7 is located below the outer sealing ring first rubber body 5, and a labyrinthine second sealing channel 9.1 is provided between the inner sealing ring second rubber body 7 and the outer sealing ring first rubber body 5. 2. The outer sealing ring second rubber body 10 is located below the inner sealing ring second rubber body 7. A labyrinth-type third sealing channel 9.3 is provided between the outer sealing ring second rubber body 10 and the inner sealing ring second rubber body 7. A labyrinth-type fourth sealing channel 9.4 is provided between the outer sealing ring second rubber body 10 and the inner sealing ring second skeleton 8. The labyrinth-type fourth sealing channel 9.4, labyrinth-type third sealing channel 9.3, labyrinth-type second sealing channel 9.2 and labyrinth-type first sealing channel 9.1 are sequentially connected to form the labyrinth-type sealing channel 9. The labyrinth-type sealing channel 9 is a narrow and irregular channel.

[0019] The first rubber body 2 of the inner sealing ring is in contact with the second rubber body 7 of the inner sealing ring.

[0020] The first rubber body 5 of the outer sealing ring is in contact with the second rubber body 10 of the outer sealing ring and the second skeleton 11 of the outer sealing ring.

[0021] The inner circle of the first rubber body 2 of the inner sealing ring is flush with the inner circle of the second rubber body 7 of the inner sealing ring.

[0022] The outer circle of the first rubber body 5 of the outer sealing ring is flush with the outer circle of the second skeleton 11 of the outer sealing ring.

[0023] In this utility model, the sealing and fixing side rubber body 1, the inner sealing ring first rubber body 2, and the inner sealing ring first skeleton 3 are combined to form a first inner sealing ring assembly, and the inner sealing ring second rubber body 7 and the inner sealing ring second skeleton 8 are combined to form a second inner sealing ring assembly. Both the first inner sealing ring assembly and the second inner sealing ring assembly are connected to the fixed part 100 of the rotating mechanism.

[0024] In this utility model, the first rubber body 5 of the outer sealing ring and the first skeleton 6 of the outer sealing ring are combined to form the first outer sealing ring assembly, and the second rubber body 10 of the outer sealing ring and the second skeleton 11 of the outer sealing ring are combined to form the second outer sealing ring assembly. Both the first outer sealing ring assembly and the second outer sealing ring assembly are connected to the rotating part 200 of the rotating mechanism.

[0025] A labyrinthine first sealing channel 9.1 is provided between the inner sealing ring first rubber body 2 and the outer sealing ring first rubber body 5; a labyrinthine second sealing channel 9.2 is provided between the inner sealing ring second rubber body 7 and the outer sealing ring first rubber body 5; a labyrinthine third sealing channel 9.3 is provided between the outer sealing ring second rubber body 10 and the inner sealing ring second rubber body 7; and a labyrinthine fourth sealing channel 9.4 is provided between the outer sealing ring second rubber body 10 and the inner sealing ring second skeleton 8. The labyrinthine fourth sealing channel 9.4, labyrinthine third sealing channel 9.3, labyrinthine second sealing channel 9.2, and labyrinthine first sealing channel 9.1 are sequentially connected to form the labyrinthine sealing channel 9. In use, the labyrinthine sealing channel 9 is filled with a high-temperature resistant and water-resistant lubricating grease, thereby further improving the protective capability. Therefore, it has a good sealing effect against external dust, liquids, and impurities. It effectively prevents external substances from entering the rotating part 200 of the rotating mechanism through this sealing structure, thus avoiding malfunctions and other losses to the rotating mechanism.

[0026] Gasket 4 is made of PTFE and mainly serves as a positioning element in the labyrinth-type dynamic seal structure for the rotating mechanism of this invention. This material possesses excellent self-lubricating properties, high and low temperature performance, and superior dry friction performance. During the mating process between gasket 4 and the inner sealing ring's first rubber body 2, it can withstand the high linear velocity of the outer bushing. During system operation, it prevents interference and friction between the inner sealing ring's first rubber body 2 and the outer sealing ring's first rubber body 5 caused by potential eccentricity.

[0027] In this invention, the first outer sealing ring assembly, the second outer sealing ring assembly, the first inner sealing ring assembly, and the second inner sealing ring assembly are non-contacting, with no solid-phase friction, which reduces power consumption and extends service life.

[0028] The rotating mechanism of this utility model uses a labyrinth-type dynamic sealing structure, which is an integral sealing structure. It has the advantages of high protection, low friction, easy installation and disassembly, and convenient maintenance.

[0029] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A labyrinth-type dynamic seal structure for a rotating mechanism, characterized in that: It includes a sealing and fixing side rubber body (1), an inner sealing ring first rubber body (2), an inner sealing ring first skeleton (3), a gasket (4), an outer sealing ring first rubber body (5), an outer sealing ring first skeleton (6), an inner sealing ring second rubber body (7), an inner sealing ring second skeleton (8), a labyrinth-type sealing channel (9), an outer sealing ring second rubber body (10), and an outer sealing ring second skeleton (11). The labyrinth-type sealing channel (9) includes a labyrinth-type first sealing channel (9.1), a labyrinth-type second sealing channel (9.2), a labyrinth-type third sealing channel (9.3), and a labyrinth-type fourth sealing channel (9.4). A sealing and fixing side rubber body (1) and an inner sealing ring first rubber body (2) are provided on the outside of the inner sealing ring first skeleton (3), an outer sealing ring first rubber body (5) is provided on the outside of the outer sealing ring first skeleton (6), an inner sealing ring second rubber body (7) is provided on the outside of the inner sealing ring second skeleton (8), and an outer sealing ring second rubber body (10) is provided on the outside of the outer sealing ring second skeleton (11). The gasket (4) and the outer sealing ring first rubber body (5) are both located below the inner sealing ring first rubber body (2). Several sealing teeth (2.1) are provided on the lower end face of the inner sealing ring first rubber body (2) corresponding to the gasket (4). A labyrinthine first sealing channel (9.1) is provided between the inner sealing ring first rubber body (2) and the outer sealing ring first rubber body (5), and the sealing teeth (2.1) are located outside the labyrinthine first sealing channel (9.1). The inner sealing ring second rubber body (7) is located below the outer sealing ring first rubber body (5). A sealing tooth (2.1) is provided between the inner sealing ring second rubber body (7) and the outer sealing ring first rubber body (5). The labyrinth-type second sealing channel (9.2) is located below the inner sealing ring second rubber body (7). A labyrinth-type third sealing channel (9.3) is provided between the outer sealing ring second rubber body (10) and the inner sealing ring second rubber body (7). A labyrinth-type fourth sealing channel (9.4) is provided between the outer sealing ring second rubber body (10) and the inner sealing ring second skeleton (8). The labyrinth-type fourth sealing channel (9.4), labyrinth-type third sealing channel (9.3), labyrinth-type second sealing channel (9.2) and labyrinth-type first sealing channel (9.1) are sequentially connected to form the labyrinth-type sealing channel (9).

2. The labyrinth-type dynamic seal structure for the rotating mechanism as described in claim 1, characterized in that: The first rubber body (2) of the inner sealing ring is in contact with the second rubber body (7) of the inner sealing ring.

3. The labyrinth-type dynamic seal structure for the rotating mechanism as described in claim 1, characterized in that: The first rubber body (5) of the outer sealing ring is in contact with the second rubber body (10) of the outer sealing ring and the second skeleton (11) of the outer sealing ring.

4. The labyrinth-type dynamic seal structure for the rotating mechanism as described in claim 1, characterized in that: The inner circle of the first rubber body (2) of the inner sealing ring is flush with the inner circle of the second rubber body (7) of the inner sealing ring.

5. The labyrinth-type dynamic seal structure for the rotating mechanism as described in claim 1, characterized in that: The outer circle of the first rubber body (5) of the outer sealing ring is flush with the outer circle of the second skeleton (11) of the outer sealing ring.

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