Water cooling structure of permanent magnet synchronous motor

Abstract

The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a water cooling structure of a permanent magnet synchronous motor, which comprises a motor shell, the bottom end of the motor shell is fixedly connected with a mounting base, a stator is mounted in the motor shell, and an inner water cooling pipe is arranged between the inner wall of the motor shell and the stator; the inner water cooling pipe arranged between the motor shell and the stator facilitates water cooling of the inner wall of the motor shell, the outer water cooling pipe on the motor shell can perform water cooling of the outer wall of the motor shell, the problem that an existing water cooling pipeline only performs heat dissipation on the motor shell is solved, the water cooling effect is good, and the service life of the motor is prolonged. The installation part is fixed to the outer wall of the motor shell through the screws, the outer water cooling pipe is fixed conveniently, the inner water cooling pipe and the outer water cooling pipe are arranged to be in radial spiral distribution, turning of the inner water cooling pipe and the outer water cooling pipe is small, flow resistance of circulating water in the water cooling pipe is reduced conveniently, and loss of an external water pump is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a water cooling structure of a permanent magnet synchronous motor. Background Art

[0002] Permanent magnet synchronous motors have very high power density, which usually brings serious temperature rise problems, thus significantly affecting the motor's operating performance, efficiency and life. There are many cooling methods for motors, including air cooling, water cooling, and oil cooling, and water cooling structure is the most economical and common.

[0003] In the prior art, a permanent magnet synchronous motor (PMSM) is typically equipped with a motor water-cooling pipe on its housing, and an external cooling water pump is used to deliver circulating water into the pipe. However, existing water-cooling pipes only dissipate heat from the motor housing, resulting in poor cooling performance. Furthermore, existing water-cooling pipes often have an axial spiral structure with numerous turns, which results in high flow resistance for the circulating water within the pipe and high losses in the external water pump. Therefore, we propose a water-cooling structure for a permanent magnet synchronous motor. Utility Model Content

[0004] The purpose of the present invention is to provide a water-cooling structure for a permanent magnet synchronous motor to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a water-cooling structure for a permanent magnet synchronous motor, comprising: a motor housing, a mounting base fixedly connected to the bottom end of the motor housing, a stator mounted inside the motor housing, an inner water-cooling pipe disposed between the inner wall of the motor housing and the stator, a water inlet pipe fixedly mounted at one end of the inner water-cooling pipe, and a connecting pipe connected to the other end of the inner water-cooling pipe;

[0006] An external water cooling pipe is sleeved on the outer wall of the motor housing, one end of the external water cooling pipe is connected to the connecting pipe, and the other end of the external water cooling pipe is installed with a water outlet pipe;

[0007] A mounting piece is installed on the outer wall of the motor housing close to the outer water cooling pipe, and screws are installed on the surface of the mounting piece.

[0008] Preferably, the inner water cooling pipe is distributed in a radial spiral, a water cooling groove is provided on the side wall of the stator close to the inner water cooling pipe, and a limiting groove is provided on the inner side wall of the motor housing close to the inner water cooling pipe.

[0009] Preferably, a water inlet hole is opened on the outer wall of the motor housing near the water inlet pipe, one end of the water inlet pipe is connected to the inner water cooling pipe, and the other end of the water inlet pipe passes through the water inlet hole and extends out of the motor housing.

[0010] Preferably, the external water cooling pipe is distributed in a radial spiral, a mounting groove is provided on the outer wall of the motor housing near the external water cooling pipe, a connecting hole is provided on the outer wall of the motor housing near the connecting pipe, and one end of the connecting hole is connected to the mounting groove.

[0011] Preferably, one end of the water outlet pipe is connected to the external water cooling pipe, and a connecting flange is fixedly installed on the outer wall of one end of the water inlet pipe and the water outlet pipe, and a valve is provided on one side of the two connecting flanges.

[0012] Preferably, there are several mounting members that are evenly distributed, each mounting member is fixed to the outer wall of the motor housing by screws, and each mounting member is Ω-shaped and mounted on the outer wall of the external water-cooling pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model provides an inner water-cooling pipe between the motor housing and the stator, so that the inner wall of the motor housing can be water-cooled. The outer water-cooling pipe on the motor housing can be water-cooled, which solves the problem that the existing water-cooling pipe only dissipates heat from the motor housing, and has a better water-cooling effect. The mounting part is fixed to the outer wall of the motor housing by screws, which facilitates the fixation of the outer water-cooling pipe. By arranging the inner water-cooling pipe and the outer water-cooling pipe to be radially spirally distributed, the inner water-cooling pipe and the outer water-cooling pipe have fewer turns, thereby facilitating the reduction of the flow resistance of the circulating water in the water-cooling pipe, which is beneficial to reducing the loss of the external water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side view schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a three-dimensional cross-sectional diagram of the overall structure of the utility model;

[0017] Figure 3 For this utility model Figure 2 A schematic diagram of the structure at center A;

[0018] Figure 4 This is a three-dimensional schematic diagram of the motor housing structure of the utility model;

[0019] Figure 5 It is a schematic diagram of the three-dimensional connection of the local structure of the utility model.

[0020] In the figure: 1. Motor housing; 2. Stator; 3. Mounting base; 4. Inner water-cooling pipe; 5. Outer water-cooling pipe; 6. Connecting pipe; 7. Connecting hole; 8. Limiting groove; 9. Water-cooling groove; 10. Water inlet hole; 11. Water inlet pipe; 12. Water outlet pipe; 13. Valve; 14. Connecting flange; 15. Mounting groove; 16. Mounting parts; 17. Screws. DETAILED DESCRIPTION

[0021] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "one," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0024] For the purpose of simplicity and illustration, the principles of the embodiments are described primarily with reference to examples. In the following description, many specific details are provided to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures are not described in detail to avoid unnecessarily obscuring the understanding of these embodiments. In addition, all embodiments may be used in combination with each other.

[0025] See also Figures 1 to 5The utility model provides a technical solution: a permanent magnet synchronous motor water cooling structure, comprising: a motor housing 1, a mounting base 3 is fixedly connected to the bottom end of the motor housing 1, a stator 2 is installed inside the motor housing 1, an inner water cooling pipe 4 is arranged between the inner wall of the motor housing 1 and the stator 2, one end of the inner water cooling pipe 4 is fixedly installed with a water inlet pipe 11, and the other end of the inner water cooling pipe 4 is connected to a connecting pipe 6; the inner water cooling pipe 4 is radially spirally distributed, a water cooling groove 9 is provided on the side wall of the stator 2 near the inner water cooling pipe 4, and a limiting groove 8 is provided on the inner side wall of the motor housing 1 near the inner water cooling pipe 4, and the cross-sections of the water cooling groove 9 and the limiting groove 8 are both semicircular, so that the inner water cooling pipe 4 is clamped between the water cooling groove 9 and the limiting groove 8. A water inlet hole 10 is opened on the outer wall of the motor housing 1 near the water inlet pipe 11. One end of the water inlet pipe 11 is connected to the inner water cooling pipe 4. The other end of the water inlet pipe 11 passes through the water inlet hole 10 and extends to the outside of the motor housing 1, and the outer wall of the water inlet pipe 11 and the inner wall of the water inlet hole 10 are fixedly connected.

[0026] An external water cooling pipe 5 is sleeved on the outer wall of the motor housing 1. One end of the external water cooling pipe 5 is connected to the connecting pipe 6, and the other end of the external water cooling pipe 5 is installed with a water outlet pipe 12. The external water cooling pipe 5 is distributed in a radial spiral. A mounting groove 15 is opened on the outer wall of the motor housing 1 near the external water cooling pipe 5. A connecting hole 7 is opened on the outer wall of the motor housing 1 near the connecting pipe 6. One end of the connecting hole 7 is connected to the mounting groove 15, and the outer wall of the connecting rod 6 is fixedly connected to the inner wall of the connecting hole 7, which facilitates the fixing of the connecting pipe 6. One end of the water outlet pipe 12 is connected to the external water cooling pipe 5. A connecting flange 14 is fixedly installed on the outer wall of one end of the water inlet pipe 11 and the water outlet pipe 12. A valve 13 is set on one side of each connecting flange 14 to facilitate the external water pump to provide circulating water to the internal water cooling pipe 4 and the external water cooling pipe 5.

[0027] Mounting members 16 are mounted on the outer wall of the motor housing 1 near the outer water-cooling tube 5. Screws 17 are attached to the surface of mounting members 16. Several mounting members 16 are evenly distributed, each securely attached to the outer wall of the motor housing 1 by screws 17. Each mounting member 16 is Ω-shaped and is mounted on the outer wall of the outer water-cooling tube 5. The inner wall of the mounting member 16 is tightly connected to the outer wall of the outer water-cooling tube 5.

[0028] When the device is working, the inner wall of the motor housing 1 is conveniently cooled by water through the inner water-cooling pipe 4 arranged between the motor housing 1 and the stator 2, and the outer wall of the motor housing 1 can be cooled by water through the outer water-cooling pipe 5 on the motor housing 1, so that the circulating water can flow to the outer water-cooling pipe 5 through the inner water-cooling pipe 4, solving the problem that the existing water-cooling pipe only dissipates heat for the motor housing 1, so that the water cooling effect is better, and the mounting part 16 is fixed to the outer wall of the motor housing 1 by the screw 17, which is convenient for fixing the outer water-cooling pipe 5. By setting the inner water-cooling pipe 4 and the outer water-cooling pipe 5 to be radially spirally distributed, the inner water-cooling pipe 4 and the outer water-cooling pipe 5 have fewer turns, thereby facilitating reducing the flow resistance of the circulating water in the water-cooling pipe, which is beneficial to reducing the loss of the external water pump.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water-cooling structure for a permanent magnet synchronous motor, comprising: A motor housing (1), wherein the bottom end of the motor housing (1) is fixedly connected to a mounting base (3), and is characterized in that: a stator (2) is installed inside the motor housing (1), an inner water cooling pipe (4) is provided between the inner wall of the motor housing (1) and the stator (2), a water inlet pipe (11) is fixedly installed at one end of the inner water cooling pipe (4), and the other end of the inner water cooling pipe (4) is connected to a connecting pipe (6); An external water cooling pipe (5) is sleeved on the outer wall of the motor housing (1), one end of the external water cooling pipe (5) is connected to the connecting pipe (6), and the other end of the external water cooling pipe (5) is installed with a water outlet pipe (12); A mounting piece (16) is installed on the outer wall of the motor housing (1) close to the outer water cooling pipe (5), and screws (17) are installed on the surface of the mounting piece (16).

2. The water-cooling structure of a permanent magnet synchronous motor according to claim 1, characterized in that: The inner water cooling tube (4) is distributed in a radial spiral, a water cooling groove (9) is provided on the side wall of the stator (2) close to the inner water cooling tube (4), and a limiting groove (8) is provided on the inner side wall of the motor housing (1) close to the inner water cooling tube (4).

3. The water-cooling structure of a permanent magnet synchronous motor according to claim 1, characterized in that: A water inlet hole (10) is provided on the outer wall of the motor housing (1) near the water inlet pipe (11); one end of the water inlet pipe (11) is connected to the inner water cooling pipe (4); the other end of the water inlet pipe (11) passes through the water inlet hole (10) and extends out of the motor housing (1).

4. The water-cooling structure of a permanent magnet synchronous motor according to claim 1, characterized in that: The external water cooling pipe (5) is distributed in a radial spiral. A mounting groove (15) is provided on the outer wall of the motor housing (1) near the external water cooling pipe (5). A connecting hole (7) is provided on the outer wall of the motor housing (1) near the connecting pipe (6). One end of the connecting hole (7) is connected to the mounting groove (15).

5. The water-cooling structure of a permanent magnet synchronous motor according to claim 1, characterized in that: One end of the water outlet pipe (12) is connected to the external water cooling pipe (5), and a connecting flange (14) is fixedly installed on the outer wall of one end of the water inlet pipe (11) and the water outlet pipe (12), and a valve (13) is provided on one side of the two connecting flanges (14).

6. The water-cooling structure of a permanent magnet synchronous motor according to claim 1, characterized in that: The mounting members (16) are provided in a plurality and are evenly distributed. Each mounting member (16) is fixedly mounted on the outer wall of the motor housing (1) by means of screws (17). Each mounting member (16) is Ω-shaped and is mounted on the outer wall of the external water cooling pipe (5).

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