A heat dissipation structure of a linear traction motor stator

Abstract

This invention discloses a heat dissipation structure for the stator of a linear traction motor, including a frame and a stator. The stator core is mounted on the frame, and the stator coil is wound on the core. A collecting plate is provided between the back of the core and the frame. First air collection ports are provided at the middle and both ends of the collecting plate. An air inlet and an air outlet are provided on the frame. The air outlet and the core are located on the same side of the collecting plate, while the air inlet is located on the other side of the collecting plate, facing the back of the core. A guide plate, higher in the middle and lower on both sides, is provided between the collecting plate and the air inlet. The cooling path of the heat dissipation structure is as follows: cooling air enters from the air inlet, is guided and evenly distributed by the guide plate, and reaches various parts of the collecting plate. The first air collection ports concentrate cooling of the middle and both ends of the back of the core, then cools other parts of the back of the core, and finally the air exits from the air outlet to cool the coil. This invention has the advantages of good heat dissipation and light weight.

Description

Technical Field

[0001] This invention relates to the field of motor heat dissipation technology, specifically to a heat dissipation structure for the stator of a linear traction motor. Background Technology

[0002] Linear traction motors are widely used in rail transit and subway traction vehicles due to their excellent climbing performance and turning radius. Current motor cooling primarily relies on conventional natural and forced air cooling. Natural air cooling is not ideal for dissipating heat from the iron core, while forced ventilation, due to its complex structure and the added air duct system and fan, brings many negative impacts to the linear motor, such as significantly increasing the motor's weight and maintenance costs. As rail transit vehicles, especially maglev vehicles, face increasingly stringent weight requirements for motors, reducing motor weight and increasing power density have become important improvement goals. Therefore, it is necessary to minimize motor weight while improving heat dissipation capacity. Furthermore, the unique structure of linear motors, with its various end effects and the flat induction plate adapted to the large air gap, results in significant temperature rise at both ends of the iron core, requiring focused cooling. However, existing cooling structures use a uniform heat dissipation method for the stator iron core, leading to poor overall heat dissipation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a heat dissipation structure for the stator of a linear traction motor with good heat dissipation effect and light weight.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A heat dissipation structure for a linear traction motor stator includes a frame and a stator. The stator core is mounted on the frame, and the stator coil is wound on the core. An air collecting plate is provided between the back of the core and the frame. The air collecting plate has first air collecting ports at its middle and both ends. The frame has an air inlet and an air outlet. The air outlet and the core are located on the same side of the air collecting plate, and the air inlet is located on the other side of the air collecting plate, facing the back of the core. A guide plate with a higher center and lower sides is provided between the air collecting plate and the air inlet. The cooling path of the heat dissipation structure is as follows: cooling air enters from the air inlet, is guided and circulated by the guide plate, and reaches various parts of the air collecting plate. The first air collecting ports are used to concentrate cooling on the middle and both ends of the back of the core, then cooling other parts of the back of the core, and finally the air exits from the air outlet to cool the coil.

[0006] The air guide plate is provided with mutually symmetrical air guide surfaces.

[0007] The air guide surface is concave.

[0008] The air guide plate is equipped with ventilation openings.

[0009] A second air collection outlet is provided between each of the first air collection outlets.

[0010] The size of the second air collection vent is smaller than that of the first air collection vent.

[0011] The back of the core is provided with multiple cooling grooves, which are arranged at intervals along the length of the core.

[0012] The frame includes a top base and side plates on both sides. The back of the core is connected to the side plates via threaded connectors. The air inlet is located on the top base, the air outlet is located on the side plates, and the air collecting plate is located between the top base and the back of the core.

[0013] The air inlets and outlets are provided in multiple ways. The multiple air inlets are arranged at intervals along the length of the top seat, and the multiple air outlets are arranged at intervals along the length of the side plate.

[0014] The core has a ground anchor hole at the middle of its back side, and the top seat has a ground anchor. The ground anchor is inserted into the ground anchor hole, and the threaded connector passes through the ground anchor.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The heat dissipation structure of the stator of the linear traction motor disclosed in this invention allows cooling air to enter through the air inlet. Due to the high center and low sides of the air guide plate, the direction of the cooling air is changed, causing it to flow to various parts of the air collecting plate. The air collecting plate has first air collecting ports in the middle and at both ends. Therefore, the cooling air first passes through the first air collecting ports to centrally cool the middle and both ends of the back of the iron core, and then flows to other parts for cooling. This can effectively control the temperature rise of the middle and both ends of the back of the iron core, meet the heat dissipation requirements of the linear motor, and finally exit from the air outlet to cool the coil, thus taking into account the cooling of the coil. The overall heat dissipation effect is good. Moreover, this heat dissipation structure cleverly utilizes the internal space of the frame to form the above-mentioned cooling path by setting the air collecting plate and reasonably arranging the positions of the air inlet and outlet. There is no need to add a complex air duct system, so as to improve the heat dissipation capacity without increasing the weight of the motor body too much. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the heat dissipation structure of the stator of the linear traction motor of the present invention.

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention (the arrows indicate the direction of the cooling airflow).

[0019] Figure 3 This is a diagram showing the cooling airflow direction of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the hidden side plate of the present invention.

[0021] Figure 5 This is a three-dimensional structural diagram of the hidden top seat of the present invention.

[0022] Figure 6 This is a top view of the air collecting plate in this invention.

[0023] Figure 7 This is a three-dimensional structural diagram of the iron core in this invention.

[0024] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0025] The labels in the diagram represent: 1. Frame; 11. Air inlet; 12. Air outlet; 13. Top mount; 131. Ground anchor; 14. Side plate; 2. Stator; 21. Core; 211. Cooling tank; 212. Ground anchor hole; 22. Coil; 3. Air collecting plate; 31. First air collecting port; 32. Second air collecting port; 4. Air guide plate; 41. Air guide surface; 42. Ventilation opening; 5. Threaded connector. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] Figures 1 to 8 This illustration shows an embodiment of the present invention. The heat dissipation structure of the stator of the linear traction motor in this embodiment includes a frame 1 and a stator 2. The iron core 21 of the stator 2 is mounted on the frame 1, and the coils 22 of the stator 2 are wound on the iron core 21. An air collecting plate 3 is provided between the back of the iron core 21 and the frame 1. First air collecting ports 31 are provided at the middle and both ends of the air collecting plate 3. The frame 1 is provided with an air inlet 11 and an air outlet 12. The air outlet 12 is located on the same side of the air collecting plate 3 as the iron core 21. The air inlet 11 is located on the other side of the air collecting plate 3 and faces the back of the iron core 21. Between the air collecting plate 3 and the air inlet 11, there is a guide plate 4 with a high middle and low sides. The cooling path of the heat dissipation structure is that the cooling air enters from the air inlet 11, is guided and circulated by the guide plate 4, and reaches various parts of the air collecting plate 3. The first air collecting port 31 is used to concentrate the cooling of the middle and two ends of the back of the iron core 21, and then the other parts of the back of the iron core 21 are cooled. Finally, the air is discharged from the air outlet 12 to cool the coil 22.

[0031] The cooling structure of the stator of this linear traction motor allows cooling air to enter through the air inlet 11. Due to the high center and low sides of the air guide plate 4, the direction of the cooling air is changed, causing it to flow to various parts of the air collecting plate 3. The air collecting plate 3 has first air collecting ports 31 in the middle and at both ends. Therefore, the cooling air first passes through the first air collecting ports 31 to centrally cool the middle and both ends of the back of the iron core 21, and then flows to other parts for cooling. This effectively controls the temperature rise of the middle and both ends of the back of the iron core 21, meeting the heat dissipation requirements of the linear motor. Finally, the air exits from the air outlet 12 to cool the coil 22, thus also cooling the coil 22. The overall heat dissipation effect is good. Moreover, this cooling structure cleverly utilizes the internal space of the frame 1 to form the above-mentioned cooling path by setting the air collecting plate 3 and reasonably arranging the positions of the air inlet 11 and the air outlet 12. There is no need to add a complex air duct system, which achieves the purpose of improving heat dissipation capacity without increasing the weight of the motor body.

[0032] In this embodiment, the air guide plate 4 is provided with mutually symmetrical air guide surfaces 41. The symmetrical air guide surfaces 41 evenly distribute the cooling air blown vertically from the air inlet 11 to both sides, enhancing the flow and uniformity of the cooling air, so that the cooling air can reach all parts of the air collecting plate 3, thereby improving the heat dissipation efficiency. Preferably, the air guide surface 41 is concave, which has a good guiding and uniform flow effect.

[0033] In this embodiment, the air guide plate 4 is provided with a vent 42. Cooling air can directly reach the lower air collecting plate 3 through the vent 42, reducing the cooling dead zone caused by the obstruction of the air guide plate 4 and improving heat dissipation efficiency.

[0034] In this embodiment, a second air inlet 32 ​​is provided between each of the first air inlets 31. Cooling air is supplied through the second air inlets 32 to cool the middle and the parts other than the two ends of the back of the core 21, thereby further improving the cooling effect and heat dissipation efficiency.

[0035] In this embodiment, the size of the second air inlet 32 ​​is smaller than that of the first air inlet 31. The large-sized first air inlet 31 is used to focus on cooling the middle and both ends of the back of the core 21, while the second air inlet 32 ​​is used to cool other parts of the core 21, thus meeting the heat dissipation requirements of the linear motor structure and making the layout reasonable.

[0036] In this embodiment, the back of the core 21 is provided with multiple cooling grooves 211, which are arranged at intervals along the length of the core 21. This increases the contact area between the cooling air and the back of the core 21, thereby improving the heat dissipation effect.

[0037] In this embodiment, the frame 1 includes a top base 13 and side plates 14 on both sides. The back of the core 21 is connected to the side plates 14 via threaded connectors 5. An air inlet 11 is located on the top base 13, and an air outlet 12 is located on the side plates 14. An air collecting plate 3 is located between the top base 13 and the back of the core 21. The connection between the back of the core 21 and the side plates 14 via threaded connectors 5 facilitates the disassembly of the core 21 and the maintenance of the air collecting plate 3, resulting in low maintenance costs. The threaded connector 5 can be, for example, a screw and nut assembly.

[0038] In this embodiment, multiple air inlets 11 and multiple air outlets 12 are provided. The multiple air inlets 11 are arranged at intervals along the length of the top seat 13, and the multiple air outlets 12 are arranged at intervals along the length of the side plate 14. This improves the efficiency of air intake and exhaust, thereby improving the cooling effect. Specifically, if there are two air inlets 11, then two corresponding air guide plates 4 are provided. The two air inlets 11 are located at both ends of the top seat 13. Under the action of the air guide plates 4, the cooling air is concentrated and blown towards the first air collection ports 31 at the middle and both ends of the air collection plate 3, further meeting the heat dissipation requirements of the linear motor.

[0039] In this embodiment, a ground anchor hole 212 is provided at the middle of the back of the core 21, and a ground anchor 131 is provided on the top seat 13. The ground anchor 131 is inserted into the ground anchor hole 212, and the threaded connector 5 passes through the ground anchor 131. The ground anchor 131 and the threaded connector 5 enhance the connection strength between the middle of the core 21 and the top seat 13, preventing the core 21 from deforming under load tension, and solving the problem of the middle of the core 21 sinking in actual use.

[0040] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A heat dissipation structure for the stator of a linear traction motor, comprising a frame (1) and a stator (2), wherein the iron core (21) of the stator (2) is mounted on the frame (1), and the coils (22) of the stator (2) are wound on the iron core (21), characterized in that: An air collecting plate (3) is provided between the back of the core (21) and the frame (1). The air collecting plate (3) has first air collecting ports (31) at its center and both ends. The frame (1) has an air inlet (11) and an air outlet (12). The air outlet (12) is located on the same side of the air collecting plate (3) as the core (21). The air inlet (11) is located on the other side of the air collecting plate (3) and faces the back of the core (21). 3) A guide plate (4) with a high middle and low sides is provided between the air inlet (11). The cooling path of the heat dissipation structure is that the cooling air enters from the air inlet (11), is guided and circulated by the guide plate (4), and reaches each part of the air collecting plate (3). The cooling air is concentrated in the middle and both ends of the back of the iron core (21) through the first air collecting port (31), and then the other parts of the back of the iron core (21) are cooled. Finally, the air is discharged from the air outlet (12) to cool the coil (22).

2. The heat dissipation structure of the stator of the linear traction motor according to claim 1, characterized in that: The air guide plate (4) is provided with mutually symmetrical air guide surfaces (41).

3. The heat dissipation structure of the stator of the linear traction motor according to claim 2, characterized in that: The air guide surface (41) is concave.

4. The heat dissipation structure of the stator of the linear traction motor according to claim 1, characterized in that: The air guide plate (4) is provided with a ventilation opening (42).

5. The heat dissipation structure of the stator of the linear traction motor according to claim 1, characterized in that: A second air collection outlet (32) is provided between each of the first air collection outlets (31).

6. The heat dissipation structure of the stator of the linear traction motor according to claim 5, characterized in that: The size of the second air inlet (32) is smaller than that of the first air inlet (31).

7. The heat dissipation structure of the stator of the linear traction motor according to any one of claims 1 to 6, characterized in that: The back of the core (21) is provided with multiple cooling grooves (211), which are arranged at intervals along the length of the core (21).

8. The heat dissipation structure of the stator of the linear traction motor according to any one of claims 1 to 6, characterized in that: The frame (1) includes a top seat (13) and side plates (14) on both sides. The back of the core (21) is connected to the side plates (14) on both sides through a threaded connector (5). The air inlet (11) is located on the top seat (13), the air outlet (12) is located on the side plate (14), and the air collecting plate (3) is located between the top seat (13) and the back of the core (21).

9. The heat dissipation structure of the stator of the linear traction motor according to claim 8, characterized in that: Multiple air inlets (11) and multiple air outlets (12) are provided. The multiple air inlets (11) are arranged at intervals along the length of the top seat (13), and the multiple air outlets (12) are arranged at intervals along the length of the side plate (14).

10. The heat dissipation structure of the stator of the linear traction motor according to claim 8, characterized in that: The iron core (21) has a ground anchor hole (212) at the middle of its back, and the top seat (13) has a ground anchor (131). The ground anchor (131) is inserted into the ground anchor hole (212), and the threaded connector (5) passes through the ground anchor (131).

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