A labyrinth bearing isolator suitable for internal and external pressure differentials

Abstract

The application discloses a labyrinth bearing isolator suitable for internal and external pressure difference and relates to the technical field of bearing isolators. The labyrinth bearing isolator comprises a static ring body and a dynamic ring body which are sleeved on a shaft, the outer side surface of the static ring body is provided with a static ring sealing groove, the side end surface of the static ring body is provided with a static ring clamping groove, the inner bottom of the static ring clamping groove is provided with a lower connecting ring groove, the outer side surface of the dynamic ring body is provided with a labyrinth ring groove, and the inner side surface of the dynamic ring body is provided with an upper connecting ring groove. The labyrinth ring groove is divided into more complex channels by the dynamic ring plate, the leakage resistance is increased, the elastic ring block is tightly attached to the static ring body, and the sealing strip is compressed, so that the lubricating oil leakage is effectively prevented, the sealing performance of the isolator is enhanced, the internal and external pressure difference is adapted, the stability and safety of the isolator are improved, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of bearing isolators, specifically a labyrinth bearing isolator suitable for internal and external pressure differences. Background Technology

[0002] Labyrinth bearing isolators are sealing devices used to prevent lubricating oil leakage and the intrusion of external contaminants, and are widely used in machinery, hydraulic systems, and automobiles. Their structure typically consists of a series of annular labyrinth channels, which enhance the sealing effect by increasing the complexity of fluid flow. When an internal and external pressure difference exists, the labyrinth design effectively prevents fluid passage, thereby reducing the risk of leakage. Furthermore, labyrinth bearing isolators are usually equipped with a dynamic adjustment mechanism that can adjust the sealing state in real time according to operating conditions, ensuring good sealing performance under different operating conditions. This design not only improves the reliability and safety of the equipment but also extends its service life, making it an important sealing solution in modern industry.

[0003] In existing technologies, sealing channels are typically designed as fixed, single structures that cannot be dynamically adjusted according to changes in internal and external pressure differences. This leads to decreased sealing performance and increased susceptibility to lubricant leakage when the pressure difference is large. Furthermore, traditional structures often lack effective auxiliary clamping mechanisms, resulting in insufficient tightness between the elastic ring block and the stationary ring body, which in turn causes lubricant leakage and the intrusion of external contaminants. This design flaw not only affects the operating efficiency of the equipment but may also lead to equipment damage and increased maintenance costs. Moreover, sealing strips typically lack an active force-applying structure, and their sealing performance gradually declines with prolonged use, eventually leading to seal failure. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a labyrinth bearing isolator suitable for internal and external pressure differences, thus solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A labyrinth bearing isolator suitable for internal and external pressure differential includes a stationary ring body and a rotating ring body sleeved on a shaft. The outer side of the stationary ring body is provided with a stationary ring sealing groove, and the side end face of the stationary ring body is provided with a stationary ring retaining groove. The bottom of the inner side of the stationary ring retaining groove is provided with a lower connecting ring groove. The outer side of the rotating ring body is provided with a labyrinth ring groove, and the inner side of the rotating ring body is provided with an upper connecting ring groove. The inner side of the rotating ring body and the side of the upper connecting ring groove is provided with a rotating ring sealing groove. An adjustment component is provided on the moving ring body, and a dynamic ring plate is provided on the adjustment component. The number of slots in the labyrinth ring groove is adjusted by the dynamic ring plate. The moving ring body has an internal mounting groove, and an auxiliary component is installed inside the mounting groove.

[0006] Preferably, the adjusting assembly includes an annular bolt fixedly mounted on the moving ring body, an adjusting screw ring movably mounted on the annular bolt, a positioning rotating ring rotatably mounted on the side end face of the adjusting screw ring, an adjusting pull rod fixedly mounted on the side end face of the positioning rotating ring, a connecting pull rod fixedly mounted on the end of the adjusting pull rod away from the positioning rotating ring, and an adjusting groove formed in the inner bottom of the labyrinth annular groove.

[0007] Preferably, the end of the adjusting rod away from the positioning rotating ring extends into the interior of the adjusting groove, the adjusting rod is slidably installed with the moving ring body, the connecting rod is located inside the adjusting groove, the connecting rod is slidably installed with the adjusting groove, and the end of the connecting rod away from the adjusting rod is fixedly installed with the bottom end of the dynamic ring plate.

[0008] Preferably, the auxiliary component includes an auxiliary rotating shaft rotatably mounted in the mounting groove, a rotating arc plate fixedly mounted on the auxiliary rotating shaft, a tooth block assembly fixedly mounted at the bottom end of the rotating arc plate, an upper connecting groove provided at the top end of the rotating arc plate, and an auxiliary connecting rod rotatably mounted in the upper connecting groove.

[0009] Preferably, an auxiliary pull rod is rotatably mounted on the end of the auxiliary connecting rod away from the upper connecting groove, a horizontal toothed plate is slidably mounted on the bottom of the mounting groove, a pushing block is fixedly mounted on the end of the horizontal toothed plate, an auxiliary stationary block is fixedly mounted on the moving ring body, and an elastic ring block is fixedly mounted on the lower end face of the auxiliary stationary block.

[0010] Preferably, the horizontal toothed plate is positioned directly below the rotating arc plate, the horizontal toothed plate meshes with the toothed block assembly, and the end of the auxiliary pull rod away from the auxiliary connecting rod is fixedly installed on the adjusting pull rod.

[0011] Preferably, drive discs are fixedly installed at both ends of the auxiliary rotating shaft, drive columns are fixedly installed on the outer side of the drive discs, drive connecting rods are rotatably installed on the drive columns, and a stabilizing vertical rod is rotatably installed at the end of the drive connecting rod away from the drive column, and a pushing inclined surface is provided at the bottom end of the stabilizing vertical rod.

[0012] Preferably, the inner side of the moving ring sealing groove is provided with a pushing ring groove, the inner side of the pushing ring groove is provided with a receiving groove, an auxiliary spring is fixedly connected inside the receiving groove, a pushing ring block is fixedly installed at the end of the auxiliary spring away from the receiving groove, and a pressure-bearing inclined surface is provided on the pushing ring block.

[0013] Preferably, the end of the stabilizing vertical rod away from the driving connecting rod extends into the interior of the pushing ring groove, the stabilizing vertical rod is slidably installed with the moving ring body, the pushing inclined surface is in slidable contact with the pressure inclined surface, and the pushing ring block is slidably installed inside the pushing ring groove.

[0014] This invention provides a labyrinth bearing isolator suitable for internal and external pressure differentials. Compared with the prior art, it has the following advantages: 1. This invention utilizes the rotating adjusting screw ring and its helical engagement with the annular bolt to drive the adjusting rod in a linear motion via the positioning rotating ring. During the movement of the adjusting rod, the dynamic ring plate on the connecting rod is horizontally displaced within the labyrinthine groove, moving from a position near the edge to the center. This divides one labyrinthine groove into two, creating a more complex fluid channel, increasing fluid resistance, reducing leakage, and significantly improving the sealing effect of the isolator. 2. In this invention, when the adjusting rod moves linearly, it will drive the auxiliary rod to move synchronously. The auxiliary rod, through the auxiliary connecting rod installed with its limit and the limit cooperation between the auxiliary connecting rod and the upper connecting groove, drives the rotating arc plate to rotate around the auxiliary rotating shaft. The rotating arc plate drives the tooth block group to rotate synchronously. By utilizing the meshing of the tooth block group and the horizontal tooth plate, the horizontal tooth plate is driven to move linearly, thereby driving the push block to squeeze the elastic ring block. After the lower half of the elastic ring block is compressed, it fits more tightly against the stationary ring body, effectively preventing lubricating oil leakage and external contaminant intrusion. 3. In this invention, when the auxiliary rotating shaft rotates, it drives the drive disc to move synchronously. The drive disc drives the drive connecting rod to move through the drive column. By utilizing the limiting sliding between the drive connecting rod and the moving ring body, the pushing inclined surface on the drive connecting rod slides and squeezes against the pressing inclined surface on the pushing ring block, thereby driving the pushing ring block in the pushing ring groove to press the sealing strip in the moving ring sealing groove. Through the cooperation between the pushing ring block and the sealing strip, the use effect and sealing reliability of the isolator are effectively enhanced.

[0015] 4. This invention, through the dynamic adjustment and labyrinth structure in the adjustment components and auxiliary components, by rotating the adjustment screw ring, the dynamic ring plate divides the labyrinth ring groove into more complex channels, increasing leakage resistance, while driving the elastic ring block to tightly fit the stationary ring body and press the sealing strip, thereby effectively preventing lubricating oil leakage, enhancing the sealing performance of the isolator, adapting to internal and external pressure differences, improving the stability and safety of the isolator, and extending its service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial structural schematic diagram of the dynamic ring plate in this invention; Figure 5 This is a partial cross-sectional view of the moving ring body in this invention; Figure 6 Figure 5Enlarged view of point B in the middle; Figure 7 for Figure 5 Enlarged view of point C in the middle; Figure 8 This is a schematic diagram of the rotating arc plate in this invention.

[0017] In the diagram: 1. Stationary ring body; 2. Dynamic ring body; 3. Stationary ring sealing groove; 4. Stationary ring retaining groove; 5. Lower connecting ring groove; 6. Labyrinth ring groove; 7. Upper connecting ring groove; 8. Dynamic ring sealing groove; 9. Dynamic ring plate; 10. Mounting groove; 11. Ring bolt; 12. Adjusting screw ring; 13. Positioning rotating ring; 14. Adjusting tie rod; 15. Connecting tie rod; 16. Adjusting groove; 17. Auxiliary rotating shaft; 18. Rotating arc plate; 19. Tooth block assembly; 20. Upper connecting groove; 21. Auxiliary connecting rod; 22. Auxiliary tie rod; 23. Horizontal tooth plate; 24. Pushing top block; 25. Auxiliary stationary block; 26. Elastic ring block; 27. Drive disc; 28. Drive column; 29. ​​Drive connecting rod; 30. Stabilizing vertical rod; 31. Pushing inclined plane; 32. Pushing ring groove; 33. Storage groove; 34. Auxiliary spring; 35. Pushing ring block; 36. Pressure inclined plane. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-8This invention relates to a labyrinth bearing isolator suitable for internal and external pressure differences, comprising a stationary ring body 1 and a rotating ring body 2 sleeved on a shaft. The outer surface of the stationary ring body 1 has a stationary ring sealing groove 3, and the side end face of the stationary ring body 1 has a stationary ring retaining groove 4. The inner bottom of the stationary ring retaining groove 4 has a lower connecting ring groove 5. The outer surface of the rotating ring body 2 has a labyrinth ring groove 6, and the inner surface of the rotating ring body 2 has an upper connecting ring groove 7. The inner surface of the rotating ring body 2, located on one side of the upper connecting ring groove 7, has a rotating ring sealing groove 8. An adjustment assembly is provided on the rotating ring body 2, and the adjustment assembly has a dynamic ring plate 9. The number of slots in the labyrinth ring groove 6 is adjusted by the dynamic ring plate 9. The adjustment assembly includes an annular bolt 11 fixedly installed on the rotating ring body 2, and an adjusting screw ring 12 movably installed on the annular bolt 11. The side end face of the adjusting screw ring 12 rotates. A positioning rotating ring 13 is installed, and an adjusting rod 14 is fixedly installed on the side end face of the positioning rotating ring 13. A connecting rod 15 is fixedly installed at the end of the adjusting rod 14 away from the positioning rotating ring 13. An adjusting groove 16 is opened at the bottom of the labyrinth ring groove 6. The end of the adjusting rod 14 away from the positioning rotating ring 13 extends into the interior of the adjusting groove 16. The adjusting rod 14 is slidably installed with the moving ring body 2. The connecting rod 15 is located inside the adjusting groove 16. The connecting rod 15 is slidably installed with the adjusting groove 16. The end of the connecting rod 15 away from the adjusting rod 14 is fixedly installed with the bottom end of the dynamic ring plate 9. A sealing strip can be installed inside the static ring sealing groove 3 and the moving ring sealing groove 8. At the same time, the fit between the upper connecting ring groove 7 and the lower connecting ring groove 5 can form a complete sealing groove, and a sealing strip can be installed in the sealing groove.

[0020] In this embodiment, by rotating the adjusting screw ring 12, and utilizing the cooperation between the adjusting screw ring 12 and the annular bolt 11, the adjusting screw ring 12 will drive the adjusting rod 14 to move linearly through the positioning rotating ring 13. When the adjusting rod 14 moves linearly, it will drive the dynamic ring plate 9 on the connecting rod 15 to adjust its position in the labyrinth annular groove 6, so that it moves horizontally from the edge position of the labyrinth annular groove 6 to the center position. When the position of the dynamic ring plate 9 changes, one labyrinth annular groove 6 can be divided into two, which can form a more complex fluid channel, increase the resistance of fluid flow, thereby reducing leakage and effectively improving the sealing effect of the entire isolator.

[0021] The rotating ring body 2 has an internal mounting groove 10, and an auxiliary component is installed inside the mounting groove 10. The auxiliary component includes an auxiliary rotating shaft 17 rotatably mounted in the mounting groove 10, a rotating arc plate 18 fixedly mounted on the auxiliary rotating shaft 17, a toothed block assembly 19 fixedly mounted at the bottom end of the rotating arc plate 18, an upper connecting groove 20 at the top end of the rotating arc plate 18, an auxiliary connecting rod 21 rotatably mounted in the upper connecting groove 20, and an auxiliary pull rod 22 rotatably mounted at the end of the auxiliary connecting rod 21 away from the upper connecting groove 20. A horizontal [unclear] is slidably mounted at the bottom of the mounting groove 10. The toothed plate 23 has a push block 24 fixedly installed at its end. An auxiliary fixed block 25 is fixedly installed on the moving ring body 2. An elastic ring block 26 is fixedly installed on the lower end face of the auxiliary fixed block 25. The horizontal toothed plate 23 is located directly below the rotating arc plate 18. The horizontal toothed plate 23 meshes with the toothed block assembly 19. The end of the auxiliary pull rod 22 away from the auxiliary connecting rod 21 is fixedly installed on the adjusting pull rod 14. The internal structure of the mounting groove 10 can be adjusted according to the needs of the personnel to ensure that the structure in the mounting groove 10 can move normally.

[0022] In this embodiment, when the adjusting rod 14 moves linearly, it will drive the auxiliary rod 22 to move synchronously. When the auxiliary rod 22 moves, the limiting installation of the auxiliary rod 22 and the auxiliary connecting rod 21, as well as the limiting of the auxiliary connecting rod 21 and the upper connecting groove 20, can drive the rotating arc plate 18 to rotate around the auxiliary rotating shaft 17. When the rotating arc plate 18 rotates, it will drive the tooth block group 19 to rotate synchronously. Then, by utilizing the meshing of the tooth block group 19 and the horizontal tooth plate 23, the horizontal tooth plate 23 will drive the pushing top block 24 to push the elastic ring block 26 when it moves linearly. When the lower half of the elastic ring block 26 is squeezed, the elastic ring block 26 will fit more closely to the stationary ring body 1, effectively preventing lubricating oil leakage and the intrusion of external contaminants.

[0023] Drive discs 27 are fixedly mounted at both ends of the auxiliary rotating shaft 17. A drive column 28 is fixedly mounted on the outer side of the drive disc 27. A drive connecting rod 29 is rotatably mounted on the drive column 28. A stabilizing vertical rod 30 is rotatably mounted at the end of the drive connecting rod 29 away from the drive column 28. A pushing inclined surface 31 is provided at the bottom end of the stabilizing vertical rod 30. A pushing ring groove 32 is provided on the inner side of the moving ring sealing groove 8. A receiving groove 33 is provided on the inner side of the pushing ring groove 32. An auxiliary spring 34 is fixedly connected inside the receiving groove 33. A pushing ring block 35 is fixedly mounted at the end of the auxiliary spring 34 away from the receiving groove 33. A receiving ring block 35 is provided on the pushing ring block 35. The pressure slope 36 and the end of the stabilizing vertical rod 30 away from the driving connecting rod 29 extend into the interior of the pushing ring groove 32. The stabilizing vertical rod 30 is slidably installed with the moving ring body 2. The pushing slope 31 and the pressure slope 36 are in sliding contact. The pushing ring block 35 is slidably installed inside the pushing ring groove 32. The driving column 28 can be set into a T-shape according to the needs of the personnel. The driving column 28 can ensure that the driving connecting rod 29 will not fall off. The pushing slope 31 and the pressure slope 36 are in close sliding contact. At the same time, the reaction mechanism of the auxiliary spring 34 can ensure that the pushing ring block 35, which has changed position, returns to its original position.

[0024] In this embodiment, when the auxiliary rotating shaft 17 rotates, it will drive the drive disk 27 to move synchronously. When the drive disk 27 rotates, it will drive the drive connecting rod 29 on the drive column 28 to move. By utilizing the limiting sliding between the drive connecting rod 29 and the moving ring body 2, the pushing inclined surface 31 on the drive connecting rod 29 can be driven to move. Through the sliding compression between the pushing inclined surface 31 and the pressure inclined surface 36 on the pushing ring block 35, the pushing ring block 35 in the pushing ring groove 32 can squeeze the sealing strip in the moving ring sealing groove 8. Through the cooperation between the pushing ring block 35 and the sealing strip, the use effect of the isolator can be effectively enhanced.

[0025] Working principle: In use, when the adjusting rod 14 moves linearly, it will drive the auxiliary rod 22 to move synchronously. When the auxiliary rod 22 moves, the limiting installation of the auxiliary rod 22 and the auxiliary connecting rod 21, as well as the limiting of the auxiliary connecting rod 21 and the upper connecting groove 20, can drive the rotating arc plate 18 to rotate around the auxiliary rotating shaft 17. When the rotating arc plate 18 rotates, it will drive the tooth block assembly 19 to rotate synchronously. Then, by utilizing the meshing of the tooth block assembly 19 and the horizontal tooth plate 23, the horizontal tooth plate 23 moves linearly... When the device moves, it will drive the push block 24 to push the elastic ring block 26. When the lower half of the elastic ring block 26 is compressed, the elastic ring block 26 will fit more closely to the stationary ring body 1, effectively preventing lubricating oil leakage and the intrusion of external contaminants. When the adjusting rod 14 moves linearly, it will drive the auxiliary rod 22 to move synchronously. When the auxiliary rod 22 moves, the limiting installation of the auxiliary rod 22 and the auxiliary connecting rod 21, as well as the limiting of the auxiliary connecting rod 21 and the upper connecting groove 20, can drive the rotating arc plate 18 to... The auxiliary rotating shaft 17 rotates around the center. When the rotating arc plate 18 rotates, it drives the tooth block assembly 19 to rotate synchronously. Then, by utilizing the meshing of the tooth block assembly 19 and the horizontal tooth plate 23, the horizontal tooth plate 23 drives the push block 24 to push the elastic ring block 26 when it moves in a straight line. When the lower half of the elastic ring block 26 is squeezed, the elastic ring block 26 will fit more closely to the stationary ring body 1, effectively preventing lubricating oil leakage and the intrusion of external contaminants. When the auxiliary rotating shaft 17 rotates, it drives the drive disk 27 to move synchronously. When the drive disk 27 rotates, it drives the drive connecting rod 29 on the drive column 28 to move. By utilizing the limiting sliding between the drive connecting rod 29 and the moving ring body 2, the push inclined surface 31 on the drive connecting rod 29 can be driven to move. Through the sliding compression of the push inclined surface 31 and the pressure inclined surface 36 on the push ring block 35, the push ring block 35 in the push ring groove 32 can squeeze the sealing strip in the moving ring sealing groove 8. Through the cooperation between the push ring block 35 and the sealing strip, the performance of the isolator can be effectively enhanced.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A labyrinth bearing isolator suitable for internal and external pressure differentials, comprising a stationary ring body (1) and a rotating ring body (2) sleeved on a shaft, characterized in that: The outer side of the stationary ring body (1) is provided with a stationary ring sealing groove (3), the side end face of the stationary ring body (1) is provided with a stationary ring slot (4), the bottom of the stationary ring slot (4) is provided with a lower connecting ring groove (5), the outer side of the moving ring body (2) is provided with a labyrinth ring groove (6), the inner side of the moving ring body (2) is provided with an upper connecting ring groove (7), and the inner side of the moving ring body (2) and the side of the upper connecting ring groove (7) is provided with a moving ring sealing groove (8). An adjustment component is provided on the moving ring body (2), and a dynamic ring plate (9) is provided on the adjustment component. The number of slots in the labyrinth ring groove (6) is adjusted by the dynamic ring plate (9). The moving ring body (2) has an installation groove (10) inside, and an auxiliary component is provided inside the installation groove (10).

2. The labyrinth bearing isolator suitable for internal and external pressure differences according to claim 1, characterized in that: The adjustment assembly includes an annular bolt (11) fixedly mounted on the moving ring body (2), an adjusting screw ring (12) movably mounted on the annular bolt (11), a positioning rotating ring (13) rotatably mounted on the side end face of the adjusting screw ring (12), an adjusting pull rod (14) fixedly mounted on the side end face of the positioning rotating ring (13), a connecting pull rod (15) fixedly mounted on the end of the adjusting pull rod (14) away from the positioning rotating ring (13), and an adjusting pull groove (16) is provided at the inner bottom of the labyrinth annular groove (6).

3. A labyrinth bearing isolator suitable for internal and external pressure differences according to claim 2, characterized in that: The end of the adjusting rod (14) away from the positioning rotating ring (13) extends into the interior of the adjusting groove (16). The adjusting rod (14) is slidably installed with the moving ring body (2). The connecting rod (15) is located inside the adjusting groove (16). The connecting rod (15) is slidably installed with the adjusting groove (16). The end of the connecting rod (15) away from the adjusting rod (14) is fixedly installed with the bottom end of the dynamic ring plate (9).

4. A labyrinth bearing isolator suitable for internal and external pressure differences according to claim 2, characterized in that: The auxiliary component includes an auxiliary rotating shaft (17) rotatably installed in the mounting groove (10), a rotating arc plate (18) fixedly installed on the auxiliary rotating shaft (17), a tooth block assembly (19) fixedly installed at the bottom end of the rotating arc plate (18), an upper connecting groove (20) is opened at the top end of the rotating arc plate (18), and an auxiliary connecting rod (21) is rotatably installed in the upper connecting groove (20).

5. A labyrinth bearing isolator suitable for internal and external pressure differences according to claim 4, characterized in that: An auxiliary pull rod (22) is rotatably installed at the end of the auxiliary connecting rod (21) away from the upper connecting groove (20). A horizontal toothed plate (23) is slidably installed at the bottom of the mounting groove (10). A push block (24) is fixedly installed at the end of the horizontal toothed plate (23). An auxiliary fixed block (25) is fixedly installed on the moving ring body (2). An elastic ring block (26) is fixedly installed on the lower end face of the auxiliary fixed block (25).

6. A labyrinth bearing isolator suitable for internal and external pressure differences according to claim 5, characterized in that: The horizontal toothed plate (23) is located directly below the rotating arc plate (18). The horizontal toothed plate (23) meshes with the tooth block assembly (19). The end of the auxiliary pull rod (22) away from the auxiliary connecting rod (21) is fixedly installed on the adjusting pull rod (14).

7. A labyrinth bearing isolator suitable for internal and external pressure differences according to claim 5, characterized in that: The auxiliary rotating shaft (17) is fixedly mounted with drive discs (27) at both ends. Drive columns (28) are fixedly mounted on the outer side of the drive discs (27). Drive connecting rods (29) are rotatably mounted on the drive columns (28). A stabilizing vertical rod (30) is rotatably mounted on the end of the drive connecting rod (29) away from the drive columns (28). A pushing inclined surface (31) is opened at the bottom end of the stabilizing vertical rod (30).

8. A labyrinth bearing isolator suitable for internal and external pressure differences according to claim 7, characterized in that: The inner side of the moving ring sealing groove (8) is provided with a pushing ring groove (32), and the inner side of the pushing ring groove (32) is provided with a receiving groove (33). An auxiliary spring (34) is fixedly connected inside the receiving groove (33). A pushing ring block (35) is fixedly installed at the end of the auxiliary spring (34) away from the receiving groove (33). A pressure inclined surface (36) is provided on the pushing ring block (35).

9. A labyrinth bearing isolator suitable for internal and external pressure differences according to claim 8, characterized in that: The end of the stabilizing vertical rod (30) away from the driving connecting rod (29) extends into the interior of the pushing ring groove (32). The stabilizing vertical rod (30) is slidably installed with the moving ring body (2). The pushing inclined surface (31) is in slidable contact with the pressure inclined surface (36). The pushing ring block (35) is slidably installed inside the pushing ring groove (32).

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