Sealing structure of three-phase asynchronous motor

Abstract

The utility model discloses a sealing structure of a three-phase asynchronous motor, and relates to the technical field of motor shells. The motor comprises a motor body and a motor rotating shaft, the motor rotating shaft is provided with a connecting bearing, the connecting bearing is fixedly sleeved on the side wall of the motor rotating shaft, one end of the connecting bearing is fixedly provided with a front side ring, and the other end of the connecting bearing is fixedly provided with a rear side ring. A compression-resistant protection mechanism is arranged on the side wall of the front side ring, and a middle-layer sealing mechanism is arranged on the connecting bearing. Sealing can be achieved on a traditional motor shell, integrated design of the motor shell is avoided, production cost can be reduced, later-stage disassembly and maintenance can be facilitated, heat can be conducted to the position between the compression-resistant protection cover and the soft rubber sealing bag through the arranged U-shaped heat conduction pipe, and the sealing performance of the motor shell is improved. Therefore, heat can be conveniently transmitted to the liquid, the heat dissipation effect of the motor after sealing can be improved, and the normal service life of the motor can be maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of motor casings, in particular to a sealing structure of a three-phase asynchronous motor. Background Art

[0002] A three-phase asynchronous motor is a type of electric motor that is powered by a 380V three-phase AC power supply. Since the rotor and stator rotating magnetic fields of a three-phase asynchronous motor rotate in the same direction but at different speeds, there is a slip rate, so it is called a three-phase asynchronous motor.

[0003] Currently, three-phase asynchronous motors are often used directly as power sources in some underwater environments. Therefore, in some cases, a good sealing effect must be achieved for the motor. Most of the current sealing structures are to set the outer shell of the motor into an integrated form. However, this is not convenient for later disassembly and maintenance. At the same time, a specially customized outer shell is required, which increases the cost. In addition, the overall design of the motor shell is not conducive to heat dissipation. Therefore, a sealing structure for a three-phase asynchronous motor is proposed. Utility Model Content

[0004] The purpose of the present utility model is to solve the problem that some sealing structures are to set the outer shell of the motor into an integrated form, which is inconvenient for subsequent disassembly and maintenance, and also requires a specially customized outer shell, resulting in increased costs, and the overall design of the motor shell is not conducive to heat dissipation. The present utility model provides a sealing structure for a three-phase asynchronous motor.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A sealing structure for a three-phase asynchronous motor includes a motor body and a motor shaft, wherein a connecting bearing is provided on the motor shaft, the connecting bearing is fixedly sleeved on the side wall of the motor shaft, a front ring is fixedly installed on one end of the connecting bearing, and a rear ring is fixedly installed on the other end of the connecting bearing, an anti-pressure protection mechanism is provided on the side wall of the front ring, a middle-layer sealing mechanism is provided on the connecting bearing, an internal support mechanism is provided on the side wall of the rear ring, and the internal support mechanism is connected to the motor body.

[0007] Preferably, the internal support mechanism includes a support shell, the support shell is fixedly mounted on the rear ring, and one side of the support shell is fixedly connected to the motor body.

[0008] Preferably, the middle-layer sealing mechanism includes a soft-gel sealing bag, which is arranged on the outside of the supporting shell and fixedly arranged on the outer side wall of the connecting bearing.

[0009] Preferably, a plurality of U-shaped heat-conducting pipes are fixedly installed on the side wall of the soft-gel sealed bag, the two end pipe openings of the U-shaped heat-conducting pipes are connected to the space between the soft-gel sealed bag and the supporting shell, and a plurality of ventilation holes are opened on the pipe wall of the U-shaped heat-conducting pipe between the soft-gel sealed bag and the supporting shell.

[0010] Preferably, the anti-pressure protection mechanism includes a connecting ring, the connecting ring is fixedly sleeved on the side wall of the front ring, and an anti-pressure protection cover is provided on the side wall of the connecting ring.

[0011] Preferably, a plurality of water holes are provided on the side wall of the pressure-resistant protective cover, and a plug-in hole is provided on the side wall of the pressure-resistant protective cover, a positioning screw hole is provided on the side wall of the connecting ring, and the positioning screw hole and the plug-in hole are matched, and positioning bolts are provided in the positioning screw hole and the plug-in hole.

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

[0013] 1. In the present invention, the connecting bearing is fixedly sleeved on the motor shaft, and then the supporting shell is used as the internal support of the motor body. Then, a soft rubber sealing bag is sleeved on the connecting bearing for sealing, so that sealing can be achieved on the traditional motor shell, avoiding the integrated design of the motor outer shell, which not only reduces the production cost, but also facilitates later disassembly and maintenance. Then, the U-shaped heat pipe is used to conduct heat between the pressure-resistant protective cover and the soft rubber sealing bag, thereby facilitating the transfer of heat to the liquid, which is beneficial to improving the heat dissipation effect of the motor after sealing and maintaining the normal service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view schematic diagram of the overall three-dimensional connection structure of the utility model;

[0015] Figure 2 It is a partial cross-sectional three-dimensional structural diagram of the pressure-resistant protective cover in the utility model;

[0016] Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the soft rubber sealing bag and the pressure-resistant protective cover in the utility model;

[0017] Figure 4 It is a partial cross-sectional three-dimensional structural diagram of the support shell and the soft rubber sealing bag in the utility model;

[0018] Figure 5 It is a schematic diagram of the three-dimensional connection structure of the U-shaped heat pipe in the utility model.

[0019] Figure numerals: 1. Motor shaft; 2. Front ring; 3. Connecting ring; 4. Pressure-resistant protective cover; 5. Connecting hole; 6. Positioning bolt; 7. Water hole; 8. Positioning screw hole; 9. Ventilation hole; 10. Soft rubber sealing bag; 11. U-shaped heat pipe; 12. Connecting bearing; 13. Rear ring; 14. Support shell; 15. Motor body. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the utility model is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0024] like Figure 1-5As shown, a sealing structure of a three-phase asynchronous motor includes a motor body 15 and a motor shaft 1. A connecting bearing 12 is provided on the motor shaft 1, and the connecting bearing 12 is fixedly sleeved on the side wall of the motor shaft 1. One end of the connecting bearing 12 is fixedly mounted with a front ring 2, and the other end of the connecting bearing 12 is fixedly mounted with a rear ring 13. An internal support mechanism is provided on the side wall of the rear ring 13, and the internal support mechanism includes a support shell 14, which is fixedly mounted on the rear ring 13, and one side of the support shell 14 is fixedly connected to the motor body 15. The side wall of the support shell 14 can be set in a grid shape, and air holes can also be opened on the side wall of the support shell 14, so as to provide a heat dissipation effect while satisfying the support effect.

[0025] A middle-layer sealing mechanism is provided on the connecting bearing 12, and the middle-layer sealing mechanism includes a soft rubber sealing bag 10. The soft rubber sealing bag 10 is provided on the outside of the supporting shell 14, and the soft rubber sealing bag 10 is fixedly provided on the outer side wall of the connecting bearing 12. The soft rubber sealing bag 10 is preferably made of rubber material. The soft rubber sealing bag 10 is sleeved on the connecting bearing 12 for sealing, so that sealing can be achieved on the traditional motor housing, avoiding the integrated design of the motor outer shell, which not only reduces production costs, but also facilitates later disassembly and maintenance.

[0026] A plurality of U-shaped heat-conducting pipes 11 are fixedly installed on the side wall of the soft-gel sealed bag 10. The two end openings of the U-shaped heat-conducting pipes 11 are connected to the space between the soft-gel sealed bag 10 and the supporting shell 14. A plurality of ventilation holes 9 are opened on the pipe wall of the U-shaped heat-conducting pipes 11 located between the soft-gel sealed bag 10 and the supporting shell 14. The set U-shaped heat-conducting pipes 11 can conduct heat to the outside of the soft-gel sealed bag 10, thereby facilitating the transfer of heat to the liquid, which is beneficial to improving the heat dissipation effect of the motor after sealing.

[0027] A pressure-resistant protection mechanism is provided on the side wall of the front ring 2, and the pressure-resistant protection mechanism includes a connecting ring 3, which is fixedly sleeved on the side wall of the front ring 2, and a pressure-resistant protection cover 4 is provided on the side wall of the connecting ring 3. The pressure-resistant protection cover 4 can prevent external objects from causing damage to the soft rubber sealing bag 10. A plurality of water holes 7 are opened on the side wall of the pressure-resistant protection cover 4. The water holes 7 can facilitate the entry of liquid into the pressure-resistant protection cover 4, which is beneficial to improving the heat dissipation effect.

[0028] A plug-in hole 5 is provided on the side wall of the pressure-resistant protective cover 4, and a positioning screw hole 8 is provided on the side wall of the connecting ring 3, and the positioning screw hole 8 is matched with the plug-in hole 5. Positioning bolts 6 are provided in the positioning screw hole 8 and the plug-in hole 5. The positioning bolts 6 can be used to facilitate the disassembly of the pressure-resistant protective cover 4, thereby facilitating the installation and disassembly of the sealing structure on the motor body 15.

[0029] In summary: the connecting bearing 12 is fixedly mounted on the motor shaft 1, and then the supporting shell 14 is used as the internal support for the motor body 15, and then the soft rubber sealing bag 10 is mounted on the motor body 15 for sealing, and the soft rubber sealing bag 10 is sealed and fixed on the outside of the connecting bearing 12, so that sealing can be achieved on the traditional motor housing. During the sealing process, the U-shaped heat pipe 11 is used to conduct heat between the pressure-resistant protective cover 4 and the soft rubber sealing bag 10, thereby facilitating the transfer of heat to the liquid and maintaining a good heat dissipation effect of the motor body 15 under sealed conditions.

[0030] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealing structure for a three-phase asynchronous motor, characterized in that: The invention comprises a motor body (15) and a motor shaft (1), wherein a connecting bearing (12) is arranged on the motor shaft (1), wherein the connecting bearing (12) is fixedly sleeved on the side wall of the motor shaft (1), wherein a front ring (2) is fixedly mounted on one end of the connecting bearing (12), and a rear ring (13) is fixedly mounted on the other end of the connecting bearing (12), wherein an anti-pressure protection mechanism is arranged on the side wall of the front ring (2), wherein a middle-layer sealing mechanism is arranged on the connecting bearing (12), and an internal support mechanism is arranged on the side wall of the rear ring (13), and wherein the internal support mechanism is connected to the motor body (15).

2. The sealing structure of a three-phase asynchronous motor according to claim 1, characterized in that: The internal support mechanism comprises a support shell (14), the support shell (14) is fixedly mounted on the rear ring (13), and one side of the support shell (14) is fixedly connected to the motor body (15).

3. The sealing structure of a three-phase asynchronous motor according to claim 2, characterized in that: The middle-layer sealing mechanism comprises a soft-gel sealing bag (10), which is arranged on the outside of the supporting shell (14), and the soft-gel sealing bag (10) is fixedly arranged on the outer side wall of the connecting bearing (12).

4. The sealing structure of a three-phase asynchronous motor according to claim 3, characterized in that: A plurality of U-shaped heat-conducting pipes (11) are fixedly mounted on the side wall of the soft-gel sealed bag (10), the two end openings of the U-shaped heat-conducting pipes (11) are connected to the space between the soft-gel sealed bag (10) and the supporting shell (14), and a plurality of ventilation holes (9) are provided on the pipe wall of the U-shaped heat-conducting pipes (11) located between the soft-gel sealed bag (10) and the supporting shell (14).

5. The sealing structure of a three-phase asynchronous motor according to claim 1, characterized in that: The anti-pressure protection mechanism comprises a connecting ring (3), the connecting ring (3) is fixedly sleeved on the side wall of the front ring (2), and an anti-pressure protection cover (4) is arranged on the side wall of the connecting ring (3).

6. The sealing structure of a three-phase asynchronous motor according to claim 5, characterized in that: A plurality of water holes (7) are provided on the side wall of the pressure-resistant protective cover (4), and a plug-in hole (5) is provided on the side wall of the pressure-resistant protective cover (4). A positioning screw hole (8) is provided on the side wall of the connecting ring (3), and the positioning screw hole (8) is matched with the plug-in hole (5). Positioning bolts (6) are provided in the positioning screw hole (8) and the plug-in hole (5).

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