Waterproof rotating seal of motor rotating shaft

Abstract

The utility model provides a waterproof rotary seal of a motor rotating shaft, which relates to the field of mechanical seal, and comprises a moving ring, a static ring and a sealing element, the moving ring is sleeved on the outer surface of the motor rotating shaft, the static ring is connected with a motor casing, and the sealing element is arranged between the moving ring and the static ring. A stepped groove is formed in the inner ring of the side, away from the static ring, of the movable ring, a motor rotating shaft is inserted into the small neck portion of the stepped groove, the large neck portion of the stepped groove does not make contact with the motor rotating shaft, and the stepped groove is filled with a sealing material capable of being solidified. According to the waterproof rotary seal of the motor rotating shaft, the arranged movable ring is connected to the outer surface of the motor rotating shaft, the threaded column is locked, the stepped groove faces upwards, a sealing material is injected into the stepped groove, then a sealing plug is inserted, the sealing material is solidified, and the space between the movable ring and the motor rotating shaft is filled with the sealing material at the moment, so that a whole can be formed; leakage at the gap between the moving ring and the motor rotating shaft is avoided.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, specifically a waterproof rotary seal for a motor shaft. Background Technology

[0002] A mechanical seal is a device that prevents fluid leakage by maintaining contact and relative sliding between at least one pair of end faces perpendicular to the axis of rotation under the action of fluid pressure, the elastic force (or magnetic force) of the compensation mechanism, and the cooperation of auxiliary seals. Under the pressure of elastic elements such as springs, an extremely thin liquid film forms between the mating surfaces of the rotating and stationary rings. This precise mating surface prevents media leakage, and the liquid film simultaneously serves as lubrication and heat dissipation, thus achieving the sealing function.

[0003] In existing mechanical seals, the rotating ring is fixedly connected to the rotating shaft and rotates with the rotating shaft. The seal between the rotating ring and the rotating shaft is achieved by squeezing the seal ring. However, the seal ring may age and leak. Since the two are relatively stationary, a device is designed to completely seal the rotating shaft and the rotating ring. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a waterproof rotary seal for motor shafts, solving the problem of potential leakage between the moving ring and the rotating shaft mentioned in the background technology.

[0005] Technical solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waterproof rotary seal for a motor shaft, comprising a rotating ring, a stationary ring, and a sealing element. The rotating ring is fitted onto the outer surface of the motor shaft, the stationary ring is connected to the motor housing, and the sealing element is disposed between the rotating ring and the stationary ring. A stepped groove is formed on the inner ring of the rotating ring on the side away from the stationary ring. The small neck of the stepped groove accommodates the insertion of the motor shaft, and the large neck of the stepped groove does not contact the motor shaft. The interior of the stepped groove is filled with a curable sealing material.

[0007] Furthermore, the length of the stepped groove is less than one-third of the length of the moving ring, and multiple sets of equally spaced annular grooves are formed at the large neck end of the stepped groove.

[0008] Furthermore, the rotating ring has a threaded hole on its axial surface, and a threaded post for pressing the motor shaft is connected inside the threaded hole. A groove is provided at the end of the rotating ring away from the stepped groove, and a sealing ring from the sealing element is provided inside the groove.

[0009] Furthermore, the stepped groove has a through hole that passes through the moving ring. The axis of the through hole is parallel to the motor shaft. A retaining ring is inserted into the groove. A plug sleeve is inserted into the middle of the retaining ring and inserted into the through hole. A sealing plug is inserted into the plug sleeve.

[0010] Furthermore, the threaded post has a cross notch at one end near the motor shaft, and the cross notch is located inside the through hole.

[0011] Furthermore, the sealing material is a self-curing resin.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The waterproof rotary seal of the motor shaft is achieved by connecting a rotating ring to the outer surface of the motor shaft and locking the threaded post so that the stepped groove faces upward. Sealing material is then injected into the stepped groove, and a sealing plug is inserted to allow the sealing material to cure. At this point, the space between the rotating ring and the motor shaft is filled with the sealing material, thus forming a whole and preventing leakage at the gap between the rotating ring and the motor shaft.

[0014] 2. The waterproof rotating seal of the motor shaft is achieved by a through hole penetrating the rotating ring inside a stepped groove. The axis of the through hole is parallel to the motor shaft. A retaining ring is inserted inside the groove, and a plug sleeve is inserted into the middle of the retaining ring and inserted into the through hole. A sealing plug is inserted inside the plug sleeve. The device is placed vertically, and sealing material is injected into the stepped groove. A seal is formed by the retaining ring. The plug sleeve is used to vent air, allowing the sealing material to flow and eventually exit from the plug sleeve. At this point, the plug sealing plug completes the seal. After the sealing material has cured, the plug sleeve and retaining ring are removed, and a sealing ring is installed. This design ensures that the gap between the rotating ring and the motor shaft is completely filled with sealing material. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a half-sectional schematic diagram of the moving ring of this utility model;

[0017] Figure 3 This is a schematic diagram of the connection of the sealing material of this utility model;

[0018] Figure 4 This is a schematic diagram of the threaded column of this utility model.

[0019] Among them, 1. rotating ring; 2. stepped groove; 3. annular groove; 4. threaded hole; 5. threaded post; 6. groove; 7. sealing ring; 8. through hole; 9. retaining ring; 10. plug sleeve; 11. sealing plug; 12. cross notch; 13. sealing material; 14. stationary ring; 15. sealing element. Detailed Implementation

[0020] 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.

[0021] See Figures 1-4 A waterproof rotary seal for a motor shaft includes a rotating ring 1, a stationary ring 14, and a sealing element 15. Mechanical seals are a commonly used technical means. The improvement in this application is located in the rotating ring 1. Therefore, only the outlines of the stationary ring 14 and the sealing element 15 are shown in the figure. The rotating ring 1 is sleeved on the outer surface of the motor shaft, the stationary ring 14 is connected to the motor housing, and the sealing element 15 is disposed between the rotating ring 1 and the stationary ring 14. A stepped groove 2 is formed on the inner ring of the rotating ring 1 on the side away from the stationary ring 14. The small neck of the stepped groove 2 accommodates the insertion of the motor shaft, and the large neck of the stepped groove 2 does not contact the motor shaft. The interior of the stepped groove 2 is filled with a curable sealing material 13. The sealing material 13 is a self-curing resin. This arrangement allows the sealing material 13 to cure naturally through contact with the environment.

[0022] The length of the stepped groove 2 is less than one-third of the length of the rotating ring 1. This setting provides a position for installing other seals 15. The large neck end of the stepped groove 2 has multiple sets of equally spaced annular grooves 3. By setting the interior of the annular grooves 3, the cured sealing material 13 can be connected with the rotating ring 1. Similarly, if conditions permit, grooves can be set on the surface of the motor shaft.

[0023] The rotating ring 1 has a threaded hole 4 on its shaft surface. The threaded hole 4 is internally threaded with a threaded post 5 for pressing the motor shaft. The end of the rotating ring 1 away from the stepped groove 2 is provided with a groove 6. The groove 6 is internally provided with a sealing ring 7 from the sealing element 15. This part is the traditional sealing method of the rotating ring 1. This setting can ensure that the rotating ring 1 and the motor shaft are connected as one unit.

[0024] The stepped groove 2 has a through hole 8 that passes through the moving ring 1. The axis of the through hole 8 is parallel to the motor shaft. A retaining ring 9 is inserted into the groove 6. A plug sleeve 10 is inserted into the middle of the retaining ring 9 and inserted into the through hole 8. A sealing plug 11 is inserted into the plug sleeve 10. The device is placed vertically, and sealing material 13 is injected into the stepped groove 2. A seal is formed by the retaining ring 9. The plug sleeve 10 is used to vent air, allowing the sealing material 13 to flow and eventually be discharged from the plug sleeve 10. At this time, the plug sealing plug 11 completes the seal. After the sealing material 13 has cured, the plug sleeve 10 and retaining ring 9 are removed, and the sealing ring 7 is installed. This arrangement ensures that the gap between the moving ring 1 and the motor shaft is completely filled by the sealing material 13.

[0025] The threaded post 5 has a cross notch 12 at one end near the motor shaft. The cross notch 12 is located inside the through hole 8. This arrangement facilitates the flow of the sealing material 13 and prevents the threaded post 5 from obstructing the flow of the sealing material 13.

[0026] In use, the moving ring 1 is connected to the outer surface of the motor shaft, and the threaded post 5 is locked. At this time, the retaining ring 9 is placed in the groove 6, so that the stepped groove 2 is facing upward, and the sealing material 13 is injected into the stepped groove 2 until the sealing material 13 leaks out from the plug sleeve 10. Then, the sealing plug 11 is inserted and the sealing material 13 is allowed to cure. At this time, the moving ring 1 and the motor shaft are filled by the sealing material 13, so that they can form a whole and prevent leakage at the gap between the moving ring 1 and the motor shaft. Then, the sealing element 15 and the stationary ring 14 are installed to complete the installation of the mechanical seal.

[0027] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A water-tight rotary seal for a rotating shaft of an electric machine, comprising a dynamic ring (1), a static ring (14) and a seal (15), characterized in that: The moving ring (1) is sleeved on the outer surface of the motor rotating shaft, the static ring is connected with the motor shell, and the sealing element is arranged between the moving ring (1) and the static ring; The inner circle of the side, away from the static ring (14), of the moving ring (1) is provided with a stepped groove (2), the small neck part of the stepped groove (2) accommodates the insertion of the motor rotating shaft, the large neck part of the stepped groove (2) is not in contact with the motor rotating shaft, and the inside of the stepped groove (2) is filled with a sealable sealing material (13).

2. A rotating seal for a rotating shaft of an electric machine according to claim 1, characterized in that: The length of the stepped groove (2) is less than one third of the length of the moving ring (1), and a plurality of ring grooves (3) distributed at equal intervals are arranged in the large neck end of the stepped groove (2).

3. A rotating electrical machine shaft seal according to claim 1 or 2, wherein: The shaft surface of the moving ring (1) is provided with a threaded hole (4), a threaded column (5) for extruding the motor rotating shaft is threadedly connected in the threaded hole (4), one end of the moving ring (1), away from the stepped groove (2), is provided with a groove (6), and a sealing ring (7) in the sealing element is arranged in the groove (6).

4. A rotating electrical machine shaft seal according to claim 3, wherein: The inside of the stepped groove (2) is provided with a through hole (8) penetrating through the moving ring (1), the axis of the through hole (8) is parallel to the motor rotating shaft, a blocking ring (9) is inserted in the inside of the groove (6), the middle part of the blocking ring (9) is provided with an insertion sleeve (10) inserted in the inside of the through hole (8), and a sealing plug (11) is inserted in the inside of the insertion sleeve (10).

5. A rotating electrical machine shaft seal according to claim 4, wherein: The threaded column (5) is provided with a cross-shaped notch (12) at the end close to the motor rotating shaft, and the cross-shaped notch (12) is located in the inside of the through hole (8).

6. A rotating electrical machine shaft seal according to claim 4 or 5, wherein: The sealing material (13) is a self-curing resin.

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