Heat dissipation structure of electric motor

Abstract

This invention provides a heat dissipation structure for an electric motor. The heat dissipation structure includes a motor body, an outer shell fixedly connected to the outer surface of the motor body's casing, and a spacer ring fixedly connected at the middle between the outer shell and the motor body's casing. The spacer ring separates the outer shell and the motor body's casing, forming two annular cavities. This invention provides a heat dissipation structure for an electric motor by setting multiple heat exchange cavities and two connecting frames. The device has an outer shell outside the motor body, forming multiple strip-shaped cavities along the length of the motor body between the outer shell and the motor's outer casing. Heat exchange is achieved by simultaneously supplying water into these multiple cavities to cool the motor body. Furthermore, because the multiple cavities are approximately linearly arranged, the coolant travels a shorter distance within the cavities, preventing the coolant from becoming too hot before completing a full cycle and thus preventing localized overheating of the motor.

Description

Technical Field

[0001] This utility model relates to the field of motor heat dissipation, and in particular to a heat dissipation structure for an electric motor. Background Technology

[0002] An electric motor is a device that converts electrical energy into mechanical energy. It uses an energized coil to generate a rotating magnetic field, which acts on the rotor to form a magnetoelectric torque. Electric motors are classified into DC motors and AC motors according to the power source they use. Most motors in power systems are AC motors, which can be synchronous motors or asynchronous motors.

[0003] Electric motors generate heat during operation, so a cooling structure is needed to cool them. Chinese Patent Publication No. CN 102857016A provides a water-cooled motor housing, in which multiple left and right longitudinal partitions are cast between the outer and inner cylinder walls. These partitions are arranged in an interlocking pattern, and a longitudinal water channel is formed between the side walls of each pair of adjacent left and right longitudinal partitions. Water cooling can be achieved by circulating water through the water channel to dissipate heat from the motor.

[0004] Although the aforementioned patent can dissipate heat through water cooling, it only has one water channel. As the coolant enters the structure and flows continuously, its temperature will gradually increase. When the motor temperature is too high, the coolant temperature may rise to the same level as the motor without completely passing through the overall water channel, thus failing to achieve effective heat exchange and causing the local temperature of the motor to remain at a high level.

[0005] Therefore, it is necessary to provide a heat dissipation structure for the electric motor to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides a heat dissipation structure for an electric motor, which solves the problem in the heat dissipation structure of the above-mentioned patent that the temperature of the coolant may rise to the same level as the motor when it does not completely pass through the overall water channel, thus failing to achieve effective heat exchange and causing the local temperature of the motor to remain at a high level.

[0007] To solve the above-mentioned technical problems, this utility model provides a heat dissipation structure for an electric motor, including an electric motor body. An outer shell is fixedly connected to the outer surface of the motor body housing. A spacer ring is fixedly connected in the middle between the outer shell and the motor body housing. The spacer ring separates the outer shell and the motor body housing to form two annular cavities. Multiple partition plates are fixedly connected evenly at intervals along the circumference of the motor body inside each of the two cavities. The multiple partition plates separate the two cavities to form multiple strip-shaped heat exchange cavities.

[0008] The multiple heat exchange chambers at both ends are respectively corresponding to each other in position. The inner ends of the outer surfaces of the multiple heat exchange chambers at both ends are provided with through holes. An intermediate cooling pipe is connected between two corresponding through holes. The outer ends of the outer surfaces of the multiple heat exchange chambers at both ends are provided with liquid inlet and outlet holes. An annular connecting frame is fixedly connected to both ends of the outer surface of the outer shell and to the outside of the liquid inlet and outlet holes at both ends.

[0009] Preferably, a plurality of annular heat sinks are fixedly connected to the outer surface of the plurality of intermediate cooling pipes, and cooling fans are fixedly connected to both sides of the plurality of heat sinks.

[0010] Preferably, the plurality of heat exchange chambers are evenly spaced along the circumferential direction of the cross-section of the motor body.

[0011] Preferably, the bottom of the outer shell is fixedly connected to multiple brackets, the bottom of the multiple brackets is horizontally fixedly connected to a connecting base plate, and the upper surfaces of the multiple connecting base plates are vertically through-cut at both ends with mounting slots.

[0012] Preferably, the top of the outer surfaces of both connecting frames are vertically connected to inlet and outlet pipes.

[0013] Preferably, the tops of the plurality of mounting slots are all expanded outward to form a recessed groove.

[0014] Compared with related technologies, the heat dissipation structure of the electric motor provided by this utility model has the following beneficial effects: This utility model provides a heat dissipation structure for an electric motor. By setting multiple heat exchange chambers and two connecting frames, the device sets an outer shell outside the motor body. Multiple strip-shaped cavities are formed between the outer shell and the outer shell of the motor body along the length direction of the motor body. By simultaneously supplying water into the multiple cavities, heat exchange is carried out on the motor body to achieve the effect of heat dissipation and cooling. Furthermore, since the multiple cavities are arranged in an approximately straight line, the distance that the coolant flows inside the multiple cavities will be shorter, thus preventing the coolant temperature from being too high before the complete cycle, thereby preventing the phenomenon of local overheating of the motor. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of the heat dissipation structure for the electric motor provided by this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the heat exchange cavity of the electric motor's heat dissipation structure;

[0017] Figure 3 for Figure 1 The diagram shows a cross-sectional view of a cooling pipe in the heat dissipation structure of the electric motor.

[0018] The following are the labels in the diagram: 1. Motor body, 2. Outer shell, 3. Spacer ring, 4. Separator plate, 5. Heat exchange chamber, 6. Liquid inlet / outlet hole, 7. Connecting hole, 8. Intermediate cooling pipe, 9. Heat sink, 10. Cooling fan, 11. Connecting frame, 12. Liquid inlet / outlet pipe, 13. Connecting base plate, 14. Mounting slot. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please refer to the following: Figure 1-3 The heat dissipation structure of the electric motor includes a motor body 1, an outer shell 2 fixedly connected to the outer surface of the motor body 1, a partition ring 3 fixedly connected in the middle between the outer shell 2 and the motor body 1, the partition ring 3 separates the outer shell 2 and the motor body 1 to form two annular cavities, and multiple partition plates 4 are fixedly connected evenly at intervals along the circumference of the motor body 1 inside the two cavities, the multiple partition plates 4 separate the two cavities to form multiple strip-shaped heat exchange cavities 5;

[0021] Multiple heat exchange chambers 5 at both ends are respectively corresponding to each other in position. The inner ends of the outer surfaces of multiple heat exchange chambers 5 at both ends are provided with through holes 7. A middle cooling pipe 8 is connected between two corresponding through holes 7. The outer ends of the outer surfaces of multiple heat exchange chambers 5 at both ends are provided with liquid inlet and outlet holes 6. An annular connecting frame 11 is fixedly connected to both ends of the outer surface of the outer shell 2 and to the outside of the liquid inlet and outlet holes 6 at both ends.

[0022] Multiple heat exchange chambers 5 are evenly spaced along the circumferential direction of the cross-section of the motor body 1.

[0023] In this device, the cavity between the outer shell 2 and the outer shell of the motor body 1 is separated by a partition ring 3 and multiple partition plates 4 to form multiple strip-shaped heat exchange chambers 5. The heat exchange chambers 5 are located at both ends of the motor body 1, and the heat exchange chambers 5 at both ends correspond to each other. The corresponding two heat exchange chambers 5 are connected by an intermediate cooling pipe 8. In this structure, a front heat exchange chamber 5, a rear heat exchange chamber 5 and an intermediate cooling pipe 8 form a cooling pipeline structure. The coolant enters from the front heat exchange chamber 5, passes through the intermediate cooling pipe 8 and then enters the rear heat exchange chamber 5 and is discharged, forming a cycle. In this cycle, the coolant can exchange heat with the motor body 1, thereby achieving the effect of heat dissipation and cooling.

[0024] In actual operation, coolant is first fed into the front connecting frame 11. Then, the coolant enters the front heat exchange chamber 5 through multiple front inlet and outlet holes 6. After that, it enters the rear heat exchange chamber 5 through multiple intermediate cooling pipes 8. Then, it enters the rear connecting frame 11 through multiple rear inlet and outlet holes 6 and is discharged. Since multiple cooling pipe structures are set directly along the length of the motor body 1, the overall length of each structure is not too long. The flow time of the coolant in a single cycle is also not too long. This can prevent the coolant from getting too hot and losing its heat exchange capacity during a single cycle, thereby avoiding local high temperature in the motor body 1.

[0025] Multiple annular heat sinks 9 are fixedly connected to the outer surface of multiple intermediate cooling pipes 8, and cooling fans 10 are fixedly connected to both sides of the multiple heat sinks 9.

[0026] During the heat dissipation process, multiple cooling fans 10 will also run continuously, blowing air onto multiple heat sinks 9 to reduce the temperature of the heat sinks 9, thereby exchanging heat with the intermediate cooling pipe 8. The coolant inside the intermediate cooling pipe 8 will also be cooled down simultaneously, further preventing the coolant from losing its heat exchange capacity due to excessive temperature during a single cycle.

[0027] Both connecting frames 11 have vertically connected inlet and outlet pipes 12 on their outer surface tops.

[0028] The connecting frame 11 supplies and discharges coolant through the inlet and outlet pipes 12, and the coolant can be circulated externally by a pump.

[0029] Multiple brackets are fixedly connected to the bottom of the outer shell 2. The bottom of the multiple brackets is horizontally fixedly connected to the connecting base plate 13. The upper surfaces of the multiple connecting base plates 13 are vertically through-cut with mounting slots 14 at both ends.

[0030] The tops of multiple mounting slots 14 are all expanded outward to form a recessed groove.

[0031] The connecting base plate 13 and multiple mounting slots 14 are used to stably fix the device. The slots can tighten the bolts used for fixing and prevent them from slipping.

[0032] The working principle of the heat dissipation structure for the electric motor provided by this utility model is as follows:

[0033] In actual operation, coolant is first fed into the front connecting frame 11. Then, the coolant enters the front heat exchange chamber 5 through multiple front inlet and outlet holes 6. After that, it enters the rear heat exchange chamber 5 through multiple intermediate cooling pipes 8. Then, it enters the rear connecting frame 11 through multiple rear inlet and outlet holes 6 and is discharged. Since multiple cooling pipe structures are set directly along the length of the motor body 1, the overall length of each structure is not too long. The flow time of the coolant in a single cycle is also not too long. This can prevent the coolant from getting too hot and losing its heat exchange capacity during a single cycle, thereby avoiding local high temperature in the motor body 1.

[0034] Compared with related technologies, the heat dissipation structure of the electric motor provided by this utility model has the following beneficial effects: The device sets up multiple heat exchange chambers 5 and two connecting frames 11. The device sets an outer shell 2 outside the motor body 1. Multiple strip-shaped cavities are formed between the outer shell 2 and the outer shell of the motor and along the length direction of the motor body 1. The heat exchange of the motor body 1 is achieved by simultaneously supplying water into the multiple cavities to achieve the effect of heat dissipation and cooling. Since the multiple cavities are arranged in an approximately straight line, the distance that the coolant flows in the multiple cavities will be shorter, so the coolant temperature will not be too high before the complete cycle, thereby preventing the phenomenon of local overheating of the motor.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A heat dissipation structure for an electric motor, characterized in that: The device includes a motor body (1), an outer shell (2) is fixedly connected to the outer surface of the motor body (1), a spacer (3) is fixedly connected between the outer shell (2) and the motor body (1) at the middle, the spacer (3) separates the outer shell (2) and the motor body (1) to form two annular cavities, and multiple partition plates (4) are fixedly connected evenly at intervals along the circumference of the motor body (1) inside the two cavities, and the multiple partition plates (4) separate the two cavities to form multiple strip-shaped heat exchange cavities (5); The heat exchange chambers (5) at both ends are respectively corresponding to each other in position. The inner ends of the outer surfaces of the heat exchange chambers (5) at both ends are provided with through holes (7). A middle cooling pipe (8) is connected between two corresponding through holes (7). The outer ends of the outer surfaces of the heat exchange chambers (5) at both ends are provided with liquid inlet and outlet holes (6). An annular connecting frame (11) is fixedly connected to both ends of the outer surface of the outer shell (2) and to the outside of the liquid inlet and outlet holes (6) at both ends.

2. The heat dissipation structure of the electric motor according to claim 1, characterized in that, Multiple annular heat sinks (9) are fixedly connected to the outer surface of the multiple intermediate cooling pipes (8), and cooling fans (10) are fixedly connected to both sides of the multiple heat sinks (9).

3. The heat dissipation structure of the electric motor according to claim 1, characterized in that, The plurality of heat exchange chambers (5) are evenly spaced along the circumferential direction of the cross-section of the motor body (1).

4. The heat dissipation structure of the electric motor according to claim 1, characterized in that, The bottom of the outer shell (2) is fixedly connected to multiple brackets, and the bottom of the multiple brackets is horizontally fixedly connected to a connecting base plate (13). The upper surfaces of the multiple connecting base plates (13) are vertically opened with mounting slots (14) at both ends.

5. The heat dissipation structure of the electric motor according to claim 1, characterized in that, Both of the outer surfaces of the connecting frames (11) are vertically connected to inlet and outlet pipes (12).

6. The heat dissipation structure of the electric motor according to claim 4, characterized in that, The tops of the multiple mounting slots (14) are all expanded outward to form a recessed groove.

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