Multiple sealing structure of electric motor

Abstract

This utility model belongs to the field of electric motors, specifically a multi-sealing structure for an electric motor including a motor, a pressure cover, and a rotor. The pressure cover is fixed to the motor with bolts. The rotor is rotatably disposed within the motor cavity, and its end penetrates the pressure cover. A pressure cover shaft seal is embedded on the surface of the pressure cover. The rotor is inserted into the inner cavity of the pressure cover shaft seal. A limit ring is integrally formed on the surface of the motor. A double-sided shaft seal is movably disposed within the inner cavity of the limit ring. The double-sided shaft seal consists of an outer shaft seal ring, an inner shaft seal ring, and a partition plate. The outer and inner shaft seal rings are connected by the partition plate, which is located in the middle of the outer and inner shaft seal rings. This utility model achieves multiple seals for the motor by combining the double-sided shaft seal with the pressure cover shaft seal, which improves the motor's sealing performance during use. Simultaneously, lubricating grease flows out from the oil outlet hole, lubricating the rotor surface and the inner shaft seal ring, reducing wear on the inner shaft seal ring, and extending the service life of the double-sided shaft seal.

Description

Technical Field

[0001] This utility model relates to the field of electric motors, specifically to a multi-seal structure for electric motors. Background Technology

[0002] An electric motor is a machine that converts electrical energy (alternating current) into mechanical energy. An AC electric motor mainly consists of an electromagnet winding or distributed stator windings to generate a magnetic field and a rotating armature or rotor. Electric motors are made by utilizing the phenomenon that a current-carrying coil rotates in a magnetic field.

[0003] In existing electric motors, the rotor is sealed by a shaft seal. When the rotor rotates, friction occurs between it and the inner wall of the shaft seal, which easily causes wear on the shaft seal. When the shaft seal is damaged, the sealing performance of the electric motor decreases, which can lead to water ingress and damage to the electric motor. To solve the above problems, this application proposes a multi-seal structure for electric motors. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] To address the technical problems existing in the background art, this utility model proposes a multi-seal structure for electric motors. By combining a double-sided shaft seal with a pressure cap shaft seal, multiple seals can be achieved for the motor, improving the sealing performance of the motor during use. At the same time, lubricating grease flows out from the oil outlet hole, which can lubricate the rotor surface and the inner ring of the shaft seal, reducing wear on the inner ring of the shaft seal and extending the service life of the double-sided shaft seal, thereby solving the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides a multi-seal structure for an electric motor, including a motor, a cover, and a rotor. The cover is fixed to the motor by bolts, the rotor is rotatably disposed in the inner cavity of the motor, and the end of the rotor passes through the cover. A cover shaft seal is embedded on the surface of the cover, and the rotor is inserted into the inner cavity of the cover shaft seal.

[0008] The motor surface is integrally formed with a limiting ring, and the inner cavity of the limiting ring is movably provided with a double-sided shaft seal;

[0009] The double-sided shaft seal consists of an outer shaft seal ring, an inner shaft seal ring, and a partition plate. The outer shaft seal ring and the inner shaft seal ring are connected by a partition plate, which is located in the middle of the outer shaft seal ring and the inner shaft seal ring.

[0010] The inner wall of the shaft seal is movably equipped with fixing rings at the top and bottom.

[0011] Preferably, the double-sided shaft seal inner cavity is located above the partition plate to form an upper oil storage cavity, and the double-sided shaft seal inner cavity is located below the partition plate to form a lower oil storage cavity.

[0012] Preferably, the inner cavities of the upper oil storage chamber and the lower oil storage chamber are used for storing lubricating grease.

[0013] Preferably, the outer surface of the shaft seal of both the upper and lower oil storage chambers is provided with a positioning groove, and the fixing ring is located in the inner cavity of the positioning groove.

[0014] Preferably, both the upper and lower oil storage chambers have oil outlet holes on their inner walls, and the oil outlet holes penetrate the inner ring of the shaft seal.

[0015] Preferably, the top of the inner cavity of the limiting ring is provided with a threaded groove, and the inner wall of the limiting ring is threadedly connected to a locking pressure ring through the threaded groove, the locking pressure ring abutting against the surface of the double-sided shaft seal.

[0016] Preferably, both the motor and the pressure cover have integrally formed fixing ears on both sides, and the fixing ears are symmetrically distributed.

[0017] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0018] 1. This utility model uses two sets of fixing rings to shrink the inner ring of the shaft seal, so that the inner ring of the shaft seal is tightly attached to the rotor surface, which can improve the sealing effect of the double-sided shaft seal. The cover is fixed to the motor with bolts, and the rotor passes through the inner cavity of the cover shaft seal. By combining the double-sided shaft seal with the cover shaft seal, multiple seals can be achieved for the motor, which can improve the sealing performance of the motor during use.

[0019] 2. In this utility model, oil outlet holes are provided on the inner walls of both the upper and lower oil storage chambers. When the motor is working, the heat generated is transferred to the oil storage chamber, which will liquefy the lubricating grease. The liquefied lubricating grease flows out from the oil outlet holes, which can lubricate the rotor surface and the inner ring of the shaft seal, reduce the wear on the inner ring of the shaft seal, and extend the service life of the double-sided shaft seal. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the multi-seal structure of the electric motor of this utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the multi-seal structure of the electric motor of this utility model;

[0022] Figure 3 This is a schematic diagram of the demolding top plate structure of the multi-seal structure of the electric motor of this utility model;

[0023] Figure 4 This is a schematic diagram of the reinforced support structure for the multi-seal structure of the electric motor of this utility model;

[0024] Figure 5 This is a schematic diagram of the reinforced support structure of the multi-seal structure of the electric motor of this utility model.

[0025] Figure label:

[0026] 1. Motor; 2. Pressure cap; 3. Rotor; 4. Fixing lug; 5. Pressure cap shaft seal; 6. Limiting ring; 7. Double-sided shaft seal; 8. Shaft seal outer ring; 9. Shaft seal inner ring; 10. Divider plate; 11. Upper oil reservoir; 12. Lower oil reservoir; 13. Positioning slot; 14. Fixing ring clamp; 15. Oil outlet hole; 16. Locking pressure ring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0028] like Figure 1-5 As shown, the multi-seal structure of the electric motor proposed in this utility model includes a motor 1, a cover 2 and a rotor 3. The cover 2 is fixed to the motor 1 by bolts. The rotor 3 is rotatably disposed in the inner cavity of the motor 1, and the end of the rotor 3 passes through the cover 2. A cover shaft seal 5 is embedded on the surface of the cover 2, and the rotor 3 is inserted into the inner cavity of the cover shaft seal 5.

[0029] The motor 1 has an integrally formed limiting ring 6 on its surface, and the inner cavity of the limiting ring 6 is provided with a double-sided shaft seal 7.

[0030] The double-sided shaft seal 7 is composed of an outer shaft seal ring 8, an inner shaft seal ring 9, and a partition plate 10. The outer shaft seal ring 8 and the inner shaft seal ring 9 are connected by the partition plate 10, which is located in the middle of the outer shaft seal ring 8 and the inner shaft seal ring 9.

[0031] The inner wall of the inner ring 9 of the shaft seal is movably provided with fixing rings 14 at the top and bottom.

[0032] It should be noted that the inner cavity of the double-sided shaft seal 7 is divided into an upper oil reservoir 11 and a lower oil reservoir 12 by a partition plate 10. Both the upper oil reservoir 11 and the lower oil reservoir 12 are filled with lubricating grease. The double-sided shaft seal 7 is placed in the limiting ring 6, and the rotor 3 is inserted into the inner cavity of the double-sided shaft seal 7. The locking ring 16 is threadedly connected to the threaded groove on the inner wall of the limiting ring 6. The double-sided shaft seal 7 can be fixed by the locking ring 16, which allows for quick replacement of the double-sided shaft seal 7 when it is damaged. Positioning is achieved through positioning slot 13, and fixing rings 14 are located in the upper oil storage chamber 11 and the lower oil storage chamber 12 respectively. The inner ring 9 of the shaft seal is contracted by the two sets of fixing rings 14, so that the inner ring 9 of the shaft seal is tightly attached to the surface of the rotor 3, which can improve the sealing effect of the double-sided shaft seal 7. The cover 2 is fixed to the motor 1 by bolts, and the rotor 3 passes through the inner cavity of the cover shaft seal 5. The double-sided shaft seal 7 and the cover shaft seal 5 can achieve multiple seals for the motor 1, which can improve the sealing performance of the motor 1 during use.

[0033] In this embodiment, as Figure 4 As shown, the inner cavity of the double-sided shaft seal 7 is located above the partition plate 10 to form an upper oil storage cavity 11, and the inner cavity of the double-sided shaft seal 7 is located below the partition plate 10 to form a lower oil storage cavity 12. The inner cavities of the upper oil storage cavity 11 and the lower oil storage cavity 12 are used for storing lubricating grease, and the inner walls of the upper oil storage cavity 11 and the lower oil storage cavity 12 are provided with oil outlet holes 15, which respectively penetrate the inner ring 9 of the shaft seal.

[0034] It should be noted that both the upper oil storage chamber 11 and the lower oil storage chamber 12 have oil outlet holes 15 on their inner walls. When the motor 1 is working, the heat generated is transferred to the oil storage chamber, causing the lubricating grease to liquefy. The liquefied lubricating grease flows out from the oil outlet holes 15, which can lubricate the surface of the rotor 3 and the inner ring 9 of the shaft seal, thereby reducing wear on the inner ring 9 of the shaft seal and extending the service life of the double-sided shaft seal 7.

[0035] In this embodiment, as Figure 4 As shown, the outer ring 8 of the shaft seal in the inner cavity of the upper oil storage chamber 11 and the lower oil storage chamber 12 is provided with positioning grooves 13, and the fixing ring 14 is located in the inner cavity of the positioning groove 13.

[0036] In this embodiment, as Figure 3 As shown, a threaded groove is provided at the top of the inner cavity of the limiting ring 6, and a locking pressure ring 16 is threadedly connected to the inner wall of the limiting ring 6 through the threaded groove. The locking pressure ring 16 abuts against the surface of the double-sided shaft seal 7.

[0037] It should be noted that the locking ring 16 is threadedly connected to the threaded groove on the inner wall of the limiting ring 6. The double-sided shaft seal 7 can be fixed by the locking ring 16, and the double-sided shaft seal 7 can be quickly replaced when it is damaged.

[0038] In this embodiment, as Figure 1 As shown, both sides of the motor 1 and the pressure cover 2 are integrally formed with fixing ears 4, which are symmetrically distributed.

[0039] It should be noted that the motor 1 can be easily fixed by the fixing ear 4.

[0040] The working principle and usage process of this utility model are as follows: The inner cavity of the double-sided shaft seal 7 is divided into an upper oil storage cavity 11 and a lower oil storage cavity 12 by a partition plate 10. Both the upper oil storage cavity 11 and the lower oil storage cavity 12 are filled with lubricating grease. The double-sided shaft seal 7 is placed in the limiting ring 6, and the rotor 3 is inserted into the inner cavity of the double-sided shaft seal 7. The locking pressure ring 16 is threadedly connected to the threaded groove on the inner wall of the limiting ring 6, and the double-sided shaft seal 7 can be fixed by the locking pressure ring 16. When the double-sided shaft seal 7 is damaged, it can be quickly replaced. The fixing ring 14 is positioned by the positioning slot 13, and the fixing ring 14 is located in the upper oil storage cavity 11 and the lower oil storage cavity 12 respectively. The two sets of fixing ring 14 fix the inner cavity of the shaft seal. The inner ring 9 of the shaft seal contracts, making it tightly adhere to the surface of the rotor 3, which improves the sealing effect of the double-sided shaft seal 7. The cover 2 is fixed to the motor 1 with bolts, and the rotor 3 passes through the inner cavity of the cover shaft seal 5. The double-sided shaft seal 7 and the cover shaft seal 5 can achieve multiple seals for the motor 1, which can improve the sealing performance of the motor 1 during use. At the same time, oil outlet holes 15 are opened on the inner walls of the upper oil storage chamber 11 and the lower oil storage chamber 12. The heat generated by the motor 1 during operation is transferred to the oil storage chamber, which will liquefy the lubricating grease. The liquefied lubricating grease flows out from the oil outlet hole 15, which can lubricate the surface of the rotor 3 and the inner ring 9 of the shaft seal, reduce the wear of the inner ring 9 of the shaft seal, and improve the service life of the double-sided shaft seal 7.

[0041] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims or their equivalents.

Claims

1. A multi-sealed structure for an electric motor, comprising a motor (1), a pressure cover (2), and a rotor (3), wherein the pressure cover (2) is fixed to the motor (1) by bolts, the rotor (3) is rotatably disposed within the inner cavity of the motor (1), and the end of the rotor (3) penetrates the pressure cover (2), characterized in that, The pressure cap (2) is fitted with a pressure cap shaft seal (5), and the rotor (3) is inserted into the inner cavity of the pressure cap shaft seal (5); The motor (1) has an integrally formed limiting ring (6) on its surface, and the inner cavity of the limiting ring (6) is provided with a double-sided shaft seal (7); The double-sided shaft seal (7) consists of an outer shaft seal ring (8), an inner shaft seal ring (9), and a partition plate (10). The outer shaft seal ring (8) and the inner shaft seal ring (9) are connected by the partition plate (10), which is located in the middle of the outer shaft seal ring (8) and the inner shaft seal ring (9). The inner wall of the shaft seal inner ring (9) is movably provided with fixing rings (14) at the top and bottom.

2. The multiple seal structure for an electric motor according to claim 1, wherein The inner cavity of the double-sided shaft seal (7) is located above the partition plate (10) to form an upper oil storage cavity (11), and the inner cavity of the double-sided shaft seal (7) is located below the partition plate (10) to form a lower oil storage cavity (12).

3. The multiple seal structure for an electric motor according to claim 2, wherein The upper oil storage chamber (11) and the lower oil storage chamber (12) are used for storing lubricating grease, respectively.

4. The multiple seal structure for an electric motor according to claim 3, wherein The outer ring (8) of the shaft seal in the inner cavity of the upper oil storage chamber (11) and the lower oil storage chamber (12) are provided with positioning grooves (13), and the fixing ring (14) is located in the inner cavity of the positioning groove (13).

5. The multiple seal structure for an electric motor according to claim 4, wherein Both the upper oil storage chamber (11) and the lower oil storage chamber (12) have oil outlet holes (15) on their inner walls, and the oil outlet holes (15) penetrate the inner ring (9) of the shaft seal.

6. The multiple seal structure for an electric motor according to claim 5, wherein The upper part of the inner cavity of the limiting ring (6) is provided with a threaded groove, and the inner wall of the limiting ring (6) is threadedly connected to a locking pressure ring (16) through the threaded groove. The locking pressure ring (16) abuts against the surface of the double-sided shaft seal (7).

7. The multiple seal structure for an electric motor according to claim 6, wherein Both sides of the motor (1) and the cover (2) are integrally formed with fixing ears (4), which are symmetrically distributed.

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