Motor cooling structure and motor

Abstract

The utility model discloses a motor cooling structure and a motor, the motor cooling structure comprises a motor inner cylinder arranged between a motor outer cylinder and a stator iron core, the outer wall, facing the motor outer cylinder, of the motor inner cylinder is provided with a continuous spiral channel recessed towards the stator iron core, and the inner wall of the motor inner cylinder is attached to the outer wall of the stator iron core; the stator core realizes heat conduction through the motor inner cylinder and is used for heating the coolant in the spiral channel until the coolant is gasified; one end of the spiral channel is closed, the motor outer cylinder corresponding to the closed end of the spiral channel is provided with a coolant inlet, the other end of the spiral channel is open, and the motor inner cylinder corresponding to the open end of the spiral channel is provided with an exhaust hole for communicating the interior of the motor, so that the gasified coolant enters the motor. The motor stator iron core is used for heating the coolant to be gasified, and the gasified coolant enters the motor through the through holes, so that the problem that a low-temperature cooling medium is directly introduced into the motor to damage a coil insulation system in the motor is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of motor cooling and temperature reduction, and in particular to a motor cooling structure. In addition, the present application also relates to a motor including the above cooling structure. Background Art

[0002] The cooling systems of traditional motors mostly use air cooling and cooling medium cooling. Air cooling has limited cooling effect on the motor windings and the inside of the core, low cooling efficiency, and poor heat dissipation effect, which is not conducive to the long-term and high-frequency operation of the motor. When a lower temperature coolant is used as the cooling medium, when the coolant temperature is too low or there is a liquid medium, it is directly passed into the motor. When the low temperature or liquid phase changes to gas, the heat absorption process will cause damage to the internal coil insulation system of the motor.

[0003] Therefore, in view of the above technical problems, how to make the cooling effect of the low-temperature refrigerant act directly on the inside of the motor without damaging the internal components of the motor is a technical problem that technical personnel in this field need to solve. Utility Model Content

[0004] The purpose of the present application is to provide a motor cooling structure, which utilizes the motor stator core to heat the coolant until it vaporizes and enters the motor through a through hole, thereby avoiding the problem of low-temperature cooling medium directly entering the motor and causing damage to the internal coil insulation system of the motor.

[0005] Another object of the present application is to provide a motor including the above cooling structure.

[0006] To achieve the above-mentioned purpose, the present application provides a motor cooling structure, comprising a motor inner cylinder arranged between a motor outer cylinder and a stator core, wherein a continuous spiral channel recessed toward the stator core is provided on the outer wall of the motor inner cylinder facing the motor outer cylinder, the inner wall of the motor inner cylinder is in contact with the outer wall of the stator core, the stator core realizes heat conduction through the motor inner cylinder, and is used to heat the coolant in the spiral channel until it is vaporized;

[0007] One end of the spiral channel is closed, and a coolant inlet is provided on the motor outer cylinder corresponding to the closed end of the spiral channel. The other end of the spiral channel is open, and an exhaust hole for connecting to the inside of the motor is provided on the motor inner cylinder corresponding to the open end of the spiral channel, so that the vaporized coolant can enter the motor.

[0008] Preferably, the motor inner cylinder is sleeved on the outer periphery of the stator core and fixed to the stator core.

[0009] Preferably, the inner wall of the motor inner cylinder is provided with a first step for fixing the stator core, and the inner wall of the motor outer cylinder is provided with a second step for fixing the motor inner cylinder.

[0010] Preferably, a wave-shaped protrusion is provided in the spiral channel, and the wave-shaped protrusion is provided along the flow path of the coolant.

[0011] Preferably, each of the wave-shaped protrusions is a smooth arc-shaped protrusion, and gradually decreases along the flow path of the coolant.

[0012] Preferably, a cooling medium outlet connected to the interior of the motor is provided on the motor outer cylinder, and the cooling medium outlet is located on the motor outer cylinder on a side different from the exhaust hole, so that the vaporized coolant can penetrate the gap between the stator core and the rotor inside the motor.

[0013] Preferably, the exhaust holes are evenly distributed along the circumference of the motor inner cylinder.

[0014] Preferably, the motor inner cylinder is made of heat-conductive metal material.

[0015] Preferably, the spiral channel is in contact with the inner wall of the motor outer cylinder to form a closed spiral path, so that the coolant flows along the spiral path in the spiral channel.

[0016] A motor comprises any one of the motor cooling structures described above.

[0017] Compared with the above background technology, the present application sets a motor inner cylinder between the motor outer cylinder and the stator core, and a continuous spiral channel recessed toward the stator core is provided on the outer wall of the motor inner cylinder facing the motor outer cylinder, and the inner wall of the motor inner cylinder is in contact with the outer wall of the stator core, so that the heat of the stator core can be transferred to the motor inner cylinder, thereby heating the coolant in the spiral channel until it is completely vaporized; and one end of the spiral channel is closed, and a coolant inlet is provided on the motor outer cylinder corresponding to the closed end of the spiral channel, and the other end of the spiral channel is open, and an exhaust hole for connecting to the inside of the motor is provided on the motor inner cylinder corresponding to the open end of the spiral channel. After the coolant is vaporized, it can enter the inside of the motor through the exhaust hole, so that the inside of the motor is cooled by a cooling medium in the form of atomization or vaporization, so as to avoid the damage to the insulation system of the internal coil of the motor caused by the cooling medium temperature being too low or the cooling medium absorbing heat when the phase changes from liquid to gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the external structure of the motor cooling structure provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the spiral channel structure provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the internal cooling air path structure of the motor provided in an embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the wavy protrusion structure provided in an embodiment of the present application.

[0023] In the figure: 1, motor outer cylinder 2, coolant inlet 3, cooling medium outlet 4, motor inner cylinder 5, spiral channel 51, closed end 52, wave-shaped protrusion 53, open end 6, exhaust hole 7, stator core 8, rotor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 2 and Figure 3As shown, in this embodiment, a motor cooling structure is provided, which includes a motor inner cylinder 4 arranged between a motor outer cylinder 1 and a stator core 7. A spiral channel is opened on the outer wall of the motor inner cylinder 4 facing the motor outer cylinder 1. The spiral channel 5 is continuously arranged in a spiral structure and is recessed toward the stator core 7. The inner wall of the motor inner cylinder 4 is in contact with the outer wall of the stator core 7. The motor inner cylinder 4 is made of a heat-conducting metal material, so that the stator core 7 can achieve heat conduction through the motor inner cylinder 4, that is, the heat of the stator core 7 can be conducted to the motor inner cylinder 4. When coolant is injected into the spiral channel 5, the heat of the stator core 7 can be used to heat the coolant in the spiral channel 5, thereby achieving complete vaporization of the coolant to form a mist or gaseous cooling medium.

[0028] It should be noted that, since the spiral channel 5 is recessed toward the stator core 7, there is only a thinner motor inner cylinder 4 between the spiral channel 5 and the stator core 7. Figure 3 , so that the heat of the stator core 7 can be more easily transferred to the spiral channel 5, thereby achieving the heating of the coolant.

[0029] In addition, since the present application sets a motor inner cylinder 4 between the motor outer cylinder 1 and the stator core 7, when a coolant with a lower temperature is injected, the effect of heat absorption during the low temperature or liquid phase change to gas will only act on the motor inner cylinder 4 and will not directly act on the stator core 7, thereby effectively avoiding damage to the internal components of the motor caused by high and low temperature changes.

[0030] Please refer to Figure 1 and Figure 4 , one end of the spiral channel 5 is a closed end 51, and a coolant inlet 2 is provided on the motor outer cylinder 1 corresponding to the closed end 51 of the spiral channel 5; the other end of the spiral channel 5 is an open end 53, and an exhaust hole 6 for connecting to the inside of the motor is provided on the motor inner cylinder 4 corresponding to the open end 53 of the spiral channel 5, so that the vaporized coolant can enter the motor. That is to say, the coolant is injected through the coolant inlet 2 at the open end 53, and the coolant flows in the spiral channel 5, and the coolant is heated by the heat of the stator core 7 during the flow process, so as to achieve complete vaporization. The vaporized cooling medium enters the motor through the exhaust hole 6, thereby preventing the refrigerant from directly entering the motor when the temperature is too low or there is a liquid medium.

[0031] In summary of the above embodiments, the present application sets a motor inner cylinder 4 between the motor outer cylinder 1 and the stator core 7, and the motor inner cylinder 4 is provided with a continuous spiral channel 5 that is recessed toward the stator core 7 on the outer wall facing the motor outer cylinder 1, and the inner wall of the motor inner cylinder 4 is in contact with the outer wall of the stator core 7, so that the heat of the stator core 7 can be transferred to the motor inner cylinder 4, thereby heating the coolant in the spiral channel 5 until it is completely vaporized; and one end of the spiral channel 5 is closed, and a coolant inlet 2 is provided on the motor outer cylinder 1 corresponding to the closed end 51 of the spiral channel 5, and the other end of the spiral channel 5 is open, and an exhaust hole 6 for connecting to the inside of the motor is provided on the motor inner cylinder 4 corresponding to the open end 53 of the spiral channel 5. After the coolant is vaporized, it can enter the inside of the motor through the exhaust hole 6, so that the inside of the motor is cooled by the cooling medium in the form of atomization or vaporization, so as to avoid the damage to the insulation system of the internal coil of the motor caused by the cooling medium temperature being too low or the cooling medium absorbing heat when the phase changes from liquid to gas.

[0032] It should be noted that the motor inner cylinder 4 is fixedly arranged on the outer periphery of the stator core 7 to ensure that it can cover the outer wall of the stator core 7, thereby fully utilizing the heat on the stator core 7. Similarly, the spiral channel 5 also surrounds the outer periphery of the stator core 7.

[0033] Please refer to Figure 3 The inner wall of the motor inner cylinder 4 is provided with a first step for fixing the stator core 7, and the inner wall of the motor outer cylinder 1 is provided with a second step for fixing the motor inner cylinder 4. The two step structures can respectively limit and fix the stator core 7 and the motor inner cylinder 4, thereby improving the overall stability of the motor.

[0034] In addition, please refer to Figure 4 , a wavy protrusion 52 is provided in the spiral channel 5, and the wavy protrusion 52 is provided along the flow path of the coolant. It should be pointed out that the flow path of the coolant flows along the spiral structure of the spiral channel 5, and the wavy protrusion 52 can slow down the flow speed of the liquid coolant and increase the heating time of the coolant in the spiral channel 5, so as to achieve complete vaporization of the coolant. The vaporized cooling medium is not affected by the slowing effect of the wavy protrusion 52, and can continue to flow to the exhaust hole 6 in the spiral channel 5, thereby entering the interior of the motor.

[0035] Each protrusion of the wavy protrusion 52 is a smooth arc-shaped protrusion, and its height gradually decreases along the flow path of the coolant; in other words, since the coolant is injected into the closed end 51 of the spiral channel 5, the initial amount of coolant there is relatively large, and due to the existence of the wavy protrusion 52, the flow rate of the coolant in the spiral channel 5 will gradually decrease. Therefore, in order to avoid the wavy protrusion 52 hindering the flow of the coolant, the height of the wavy protrusion 52 is gradually reduced here, so that the coolant at the lower flow rate can also flow smoothly, and can play a certain delaying role, thereby improving the gasification effect.

[0036] Please refer to Figure 1 and Figure 3 A cooling medium outlet 3 connected to the inside of the motor is provided on the motor outer cylinder 1. The cooling medium outlet 3 is located on the motor outer cylinder 1 on a side different from the exhaust hole 6. That is, the exhaust hole 6 can pass the cooling medium into one side of the stator core 7, and the cooling medium outlet 3 is located on the other side of the stator core 7, so that the vaporized coolant can pass through the gap between the stator core 7 and the rotor 8 inside the motor, and finally flow out from the cooling medium outlet 3.

[0037] In order to allow the cooling medium to pass through the gap between the rotor 8 and the stator core 7, the exhaust holes 6 are evenly distributed along the circumference of the motor inner tube 4, so that the cooling medium can enter the inside of the motor along the circumference of the stator core 7, so that the gap between the rotor 8 and the stator core 7 can be cooled by the cooling medium.

[0038] It should be noted that the spiral channel 5 is fitted with the inner wall of the motor outer cylinder 1 to form a closed spiral path, that is, under the premise that the motor inner cylinder 4 is fitted with the motor outer cylinder 1, the spiral channel 5 is a closed spiral path, so that the coolant can flow stably along the spiral path in the spiral channel 5 to avoid accidental leakage and the like.

[0039] In addition, the present application also provides a motor, which includes any of the motor cooling structures described above, and of course also includes other necessary components that constitute the motor, which will not be described here in detail and can refer to the prior art.

[0040] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0041] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A motor cooling structure, characterized in that: The motor inner cylinder is provided between the motor outer cylinder and the stator core, wherein a continuous spiral channel which is recessed toward the stator core is provided on the outer wall of the motor inner cylinder facing the motor outer cylinder, the inner wall of the motor inner cylinder is in contact with the outer wall of the stator core, the stator core realizes heat conduction through the motor inner cylinder, and is used to heat the coolant in the spiral channel until it is gasified; One end of the spiral channel is closed, and a coolant inlet is provided on the motor outer cylinder corresponding to the closed end of the spiral channel. The other end of the spiral channel is open, and an exhaust hole for connecting to the inside of the motor is provided on the motor inner cylinder corresponding to the open end of the spiral channel, so that the vaporized coolant can enter the motor.

2. The motor cooling structure according to claim 1, characterized in that: The motor inner cylinder is sleeved on the outer periphery of the stator core and fixedly arranged with the stator core.

3. The motor cooling structure according to claim 2, characterized in that: The inner wall of the motor inner cylinder is provided with a first step for fixing the stator core, and the inner wall of the motor outer cylinder is provided with a second step for fixing the motor inner cylinder.

4. The motor cooling structure according to claim 1, characterized in that: A wave-shaped protrusion is arranged in the spiral channel, and the wave-shaped protrusion is arranged along the flow path of the coolant.

5. The motor cooling structure according to claim 4, characterized in that: Each of the wave-shaped protrusions is a smooth arc-shaped protrusion and gradually decreases along the flow path of the coolant.

6. The motor cooling structure according to claim 1, characterized in that: The motor outer cylinder is provided with a cooling medium outlet connected to the inside of the motor, and the cooling medium outlet is located on the motor outer cylinder on a side different from the exhaust hole, so that the vaporized coolant can pass through the gap between the stator core and the rotor inside the motor.

7. The motor cooling structure according to claim 1, characterized in that: The exhaust holes are evenly distributed along the circumference of the motor inner cylinder.

8. The motor cooling structure according to claim 1, characterized in that: The motor inner cylinder is made of heat-conducting metal material.

9. The motor cooling structure according to claim 1, characterized in that: The spiral channel is fitted with the inner wall of the motor outer cylinder to form a closed spiral path, so that the coolant flows along the spiral path in the spiral channel.

10. A motor, characterized in that: The motor cooling structure comprises the motor cooling structure as described in any one of claims 1 to 9.

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