Motor cooling device for high-temperature environment and motor

Abstract

The utility model provides a motor cooling device for a high-temperature environment and a motor. The motor cooling device comprises a connecting shaft connected to a power output shaft of a motor body and a cooling assembly pivotally sleeved on the outer side of the connecting shaft. The cooling assembly comprises a main body arranged on the front cover of the motor body and a heat conduction plate arranged in the main body and abutting against the front cover of the motor body, a plurality of partition plates arranged at intervals are arranged in the main body, a cooling part is arranged between the two partition plates, a first cooling cavity arranged in a snake shape is formed in the cooling part, and an inlet and an outlet are formed in the upper end of the cooling part. The other end of the first cooling cavity is connected with the outlet. A second cooling cavity is formed in the main body and is annularly arranged along the radial direction of the main body; the cooling parts and the partition plates are arranged in the second cooling cavity. The first cooling cavity and the second cooling cavity are used for containing cooling media. According to the utility model, the temperature in the motor is effectively reduced, the efficiency reduction caused by overheating is avoided, and the motor can be kept to operate in a high-efficiency state.

Description

Technical Field

[0001] The utility model relates to the technical field of electric motors, and in particular to a motor cooling device for use in high-temperature environments. The utility model also relates to an electric motor provided with the motor cooling device. Background Art

[0002] During the rebar production process, the temperature of the cooling bed on the rebar is around 900°C, and the temperature of the front end cover of the transmission motor used to drive the acceleration roller on the cooling bed can reach 200°C. Long-term operation in such a high ambient temperature often causes the motor bearings to lock and the motor to burn out frequently. Under normal batch production conditions, about 50 motors are burned out per month. Replacing the motor not only increases the cost of spare parts, but also greatly affects production efficiency and increases process costs.

[0003] Traditional electric motors rely mainly on natural ventilation and tail-mounted fan blades for heat dissipation during use. This heat dissipation method has low efficiency and cannot meet the high-intensity working process of the motor. Especially for motors in high-temperature environments, natural wind cannot play an effective cooling role.

[0004] In order to cool the motor in the existing technology, most of the methods are to surround the outside of the motor with a cooling box, and use heat exchange to cool the motor. Water is passed into the cooling box to form a circulating flow of water to achieve a cooling effect. However, this cooling method makes the motor difficult to maintain and occupies a large area, which is not conducive to implementation. Utility Model Content

[0005] In view of this, the present invention aims to provide a motor cooling device for use in high-temperature environments, so as to effectively reduce the heat of the motor and reduce the failure rate of the motor.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0007] A motor cooling device for high temperature environments comprises a connecting shaft connected to a power output shaft of a motor body, and a cooling assembly pivotally sleeved on the outside of the connecting shaft;

[0008] The cooling assembly includes a main body provided on the front cover of the motor body, a heat conducting plate provided in the main body and abutting against the front cover of the motor body, a plurality of spaced partitions provided in the main body, a cooling portion provided between two of the partitions, a first cooling cavity provided in a serpentine shape inside the cooling portion, and an inlet and an outlet provided at the upper end of the cooling portion;

[0009] One end of the first cooling chamber is connected to the inlet, and the other end is connected to the outlet;

[0010] A second cooling cavity is formed in the main body, and the second cooling cavity is arranged in an annular shape along the radial direction of the main body; a plurality of the cooling parts and the partition are arranged in the second cooling cavity;

[0011] The first cooling cavity and the second cooling cavity are used to contain cooling medium.

[0012] Furthermore, the second cooling cavity includes a transverse cavity abutting against the front cover of the motor body, and a longitudinal cavity communicating with the transverse cavity;

[0013] The transverse cavity is provided with a first opening groove, and the longitudinal cavity is provided with a second opening groove at one end away from the heat conducting plate;

[0014] The cooling medium enters the second cooling cavity through the second opening groove, and acts on the front cover of the motor body through the first opening groove to perform heat exchange.

[0015] Furthermore, the main body includes a bottom plate and a surrounding plate connected vertically, and the bottom plate and the surrounding plate are arranged in a rotating body;

[0016] The transverse cavity is formed in the bottom plate, and the longitudinal cavity is formed in the enclosure plate;

[0017] The heat conducting plate is connected to the middle of the bottom plate, a cavity is formed in the middle of the main body, and two ends of the plurality of partitions abut against the inner wall of the main body;

[0018] A first channel communicating with the second cooling cavity is provided along the length direction of the partition, and the first channel passes through the partition and the inner wall of the main body.

[0019] Furthermore, a plurality of the first channels are spaced apart along the height direction of the partition, and a connecting channel is provided between two adjacent first channels to connect the two;

[0020] The partition and the cooling portion are staggered and abutted against the heat conducting plate. A second channel is provided on the heat conducting plate in the same extending direction as the first channel. The second channel is communicated with the adjacent first channel through a connecting channel.

[0021] Furthermore, a distribution pipe is provided on the upper portion of the cooling portion, and a communication cavity is formed in the distribution pipe along its length;

[0022] The distribution pipe is formed with distribution ports corresponding to the outlets, and a plurality of the distribution ports are connected to the communication cavity;

[0023] An external pipe is further provided on the upper portion of the distribution pipe, the inner cavity of the external pipe is connected to the communication cavity, and the external pipe is used to communicate with the inlet of an external cooling device.

[0024] Furthermore, a cover plate is provided above the main body, and the cover plate is used to seal the inner cavity of the main body, and a sealed space is formed between the cover plate, the heat conducting plate and the main body;

[0025] The cooling portion and the partition are arranged in a sealed space;

[0026] A liquid inlet pipe is provided at the inlet, and the liquid inlet pipe and one end of the external pipe are penetrated and arranged on the outside of the cover plate.

[0027] Furthermore, the connecting shaft passes through the cover plate and the heat conducting plate, and is screwed to the power output end of the motor body;

[0028] Bearings are provided between the connecting shaft, the cover plate and the heat conducting plate.

[0029] The first cooling cavity is used to be filled with a liquid cooling medium, and the second cooling cavity is used to be filled with a gaseous cooling medium.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The electric motor cooling device for high-temperature environments described in the present invention is provided with a heat-conducting plate on the front cover of the motor body and a plurality of cooling parts arranged at intervals in the main body. A first cooling cavity is formed in the cooling part, and a second cooling cavity arranged along its own annular shape is formed in the main body. The front cover of the motor body is cooled by heat exchange through the first cooling cavity and the second cooling cavity, which can effectively reduce the temperature inside the motor, avoid the efficiency reduction caused by overheating, and help keep the motor running in a high-efficiency state.

[0032] In addition, by setting the second cooling cavity as a horizontal cavity in contact with the front cover, the cooling medium directly acts on the front cover of the motor body for heat exchange, further enhancing the cooling effect of the front cover, reducing the motor failure rate, and ensuring safe and stable operation of the motor.

[0033] In addition, by forming a first channel along the length direction of the partition, the first channel is connected to the second cooling cavity. By circulating the cooling medium in multiple first channels and the second cooling cavity, the temperature difference between the second cooling cavity and the first cooling cavity can be reduced, and the overall temperature of the motor body can be quickly reduced to ensure the operating performance of the motor body.

[0034] Another object of the present invention is to provide an electric motor comprising a motor body, a motor cooling device as described above connected to a power output end of the motor body, and a shield provided on the outside of the motor cooling device;

[0035] The shield is buckled on the outside of the front cover of the motor body, and the connecting end of the connecting shaft is provided through the outside of the shield;

[0036] The shield is formed with a first through hole and a second through hole for inputting and outputting a cooling medium to the first cooling cavity, and a third through hole and a fourth through hole for inputting and outputting a cooling medium to the second cooling cavity.

[0037] Furthermore, it also includes a lifting ring arranged on the outside of the motor body, and the lifting ring is used to connect with an external lifting device when transporting the motor.

[0038] Since the continuous high temperature of the external environment will cause damage to the internal materials of the motor, especially the temperature-sensitive components, the motor of the present invention arranges a heat conducting plate between the front cover and the cooling part. The heat conducting plate directly abuts the front cover, which improves the cooling effect of the front cover and reduces the risk of components such as bearings being damaged due to high temperature, thereby extending the overall life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0040] Figure 1 This is a three-dimensional schematic diagram of a motor cooling device for a high temperature environment according to an embodiment of the present utility model;

[0041] Figure 2 This is a top view of the motor cooling device for high temperature environment according to an embodiment of the present utility model;

[0042] Figure 3 for Figure 2 Schematic cross-sectional view at AA in the middle;

[0043] Figure 4 for Figure 2 Schematic cross-sectional view at AA in the middle;

[0044] Figure 5 This is a three-dimensional schematic diagram of the motor cooling device for high temperature environment according to an embodiment of the present utility model without a cover plate;

[0045] Figure 6 This is a schematic cross-sectional view of a cooling unit according to an embodiment of the present invention;

[0046] Figure 7 This is a partial cross-sectional schematic diagram of the partition plate and the heat conducting plate according to an embodiment of the present utility model;

[0047] Figure 8 This is a schematic cross-sectional view of the main body according to an embodiment of the present utility model;

[0048] Figure 9This is a schematic diagram of the connection between the motor cooling device for high temperature environment and the protective cover according to an embodiment of the present utility model;

[0049] Figure 10 for Figure 9 Schematic cross-sectional view at CC;

[0050] Figure 11 A three-dimensional schematic diagram of the electric motor according to an embodiment of the present utility model;

[0051] Figure 12 This is a schematic front view of the electric motor according to an embodiment of the present utility model.

[0052] Description of reference numerals:

[0053] 1. Motor body; 2. Connecting shaft; 3. Cooling assembly; 4. Protective cover; 5. Lifting ring;

[0054] 101, front cover;

[0055] 301. Main body; 302. Heat conducting plate; 303. Partition; 304. Cooling unit; 305. Distribution pipe; 306. External pipe; 307. Cover plate; 308. Sealed space; 309. Bearing;

[0056] 401, first through hole; 402, second through hole; 403, third through hole; 404, fourth through hole;

[0057] 3011, second cooling cavity; 3012, transverse cavity; 3013, longitudinal cavity; 3014, first opening slot; 3015, second opening slot; 3016, bottom plate; 3017, enclosure;

[0058] 3021, Second Channel;

[0059] 3031, first channel; 3032, connecting channel;

[0060] 3041, first cooling chamber; 3042, inlet; 3043, outlet;

[0061] 3051. Connecting cavity; 3052. Distribution port. DETAILED DESCRIPTION

[0062] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0063] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "back" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not 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 limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connect," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0065] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0066] This embodiment relates to a motor cooling device for use in high-temperature environments. The motor cooling device includes a connecting shaft 2 connected to the power output shaft of a motor body 1, and a cooling assembly 3 pivotally mounted on the outside of the connecting shaft 2. The cooling assembly 3 includes a main body 301 mounted on the front cover 101 of the motor body 1, a heat conducting plate 302 disposed within the main body 301 and abutting the front cover 101 of the motor body 1, a plurality of spaced-apart partitions 303 disposed within the main body 301, a cooling portion 304 disposed between two partitions 303, a first cooling chamber 3041 formed in a serpentine arrangement within the cooling portion 304, and an inlet 3042 and an outlet 3043 disposed at the upper end of the cooling portion 304.

[0067] One end of the first cooling chamber 3041 is connected to the inlet 3042, and the other end is connected to the outlet 3043. A second cooling chamber 3011 is formed within the main body 301. The second cooling chamber 3011 is arranged in an annular shape along the radial direction of the main body 301. Several cooling portions 304 and partitions 303 are disposed within the second cooling chamber 3011. The first cooling chamber 3041 and the second cooling chamber 3011 are used to hold cooling medium.

[0068] The motor cooling device for high-temperature environments of this embodiment is provided with a heat conducting plate 302 on the front cover 101 of the motor body 1, and a plurality of cooling portions 304 arranged at intervals within the main body 301. A first cooling cavity 3041 is formed within the cooling portion 304, and a second cooling cavity 3011 arranged along the main body 301 is formed therein. The front cover 101 of the motor body 1 is cooled by heat exchange through the first cooling cavity 3041 and the second cooling cavity 3011, which can effectively reduce the temperature inside the motor, avoid the efficiency drop due to overheating, and help keep the motor running in a high-efficiency state.

[0069] Based on the above overall introduction, an exemplary structure of the motor cooling device for high temperature environment of this embodiment is as follows: Figures 1 to 4 As shown, the main body 301 of this embodiment is a rotary column structure. Its outer diameter is slightly smaller than the outer diameter of the motor body 1. Figure 6 As shown, the cross section of the first cooling cavity 3041 is circular. Of course, it can also adopt a square, polygonal or other structure.

[0070] As a preferred embodiment, Figures 1 to 4 As shown, the second cooling chamber 3011 includes a transverse chamber 3012 that abuts the front cover 101 of the motor body 1, and a longitudinal chamber 3013 that communicates with the transverse chamber 3012. The transverse chamber 3012 is provided with a first opening slot 3014, and the longitudinal chamber 3013 is provided with a second opening slot 3015 at the end away from the heat conducting plate 302. The cooling medium enters the second cooling chamber 3011 through the second opening slot 3015 and acts on the front cover 101 of the motor body 1 through the first opening slot 3014 for heat exchange.

[0071] Combine Figures 2 to 4 As shown, the transverse cavity 3012 and the longitudinal cavity 3013 are connected. At the initial stage of cooling medium injection, the cooling medium enters the second cooling cavity 3011 through the second opening groove 3015, and then enters the transverse cavity 3012. Due to the setting of the first opening groove 3014, the cooling medium is in direct contact with the front cover 101 for heat exchange. In addition, by setting the transverse cavity 3012 in the second cooling cavity 3011 to abut against the front cover 101, the cooling medium directly acts on the front cover 101 of the motor body 1 for heat exchange, thereby further enhancing the cooling effect of the front cover 101, reducing the motor failure rate, and ensuring the safe and stable operation of the motor.

[0072] Preferably, if Figures 1 to 5As shown, the main body 301 includes a base plate 3016 and a surrounding plate 3017 connected vertically. The base plate 3016 and the surrounding plate 3017 are arranged in a rotating body. The transverse cavity 3012 is formed in the base plate 3016, and the longitudinal cavity 3013 is formed in the surrounding plate 3017. The heat conducting plate 302 is connected to the center of the base plate 3016. A cavity is formed in the center of the main body 301. The ends of the plurality of partitions 303 abut the inner wall of the main body 301. The base plate 3016 is annular.

[0073] like Figure 4 and Figure 7 As shown, first channels 3031 are provided along the length of the partition 303, communicating with the second cooling cavity 3011. The first channels 3031 penetrate the partition 303 and the inner wall of the main body 301. By forming the first channels 3031 along the length of the partition 303, the first channels 3031 communicate with the second cooling cavity 3011. The circulation of cooling medium through the plurality of first channels 3031 and the second cooling cavity 3011 reduces the temperature difference between the second cooling cavity 3011 and the first cooling cavity 3041, rapidly lowering the overall temperature of the motor body 1 and ensuring the operational performance of the motor body 1.

[0074] Further, as Figure 4 and Figure 7 As shown, multiple first channels 3031 are spaced apart along the height direction of the partition 303, and a connecting channel 3032 is provided between two adjacent first channels 3031. The partition 303 and the cooling portion 304 are staggered and abutted against the heat conducting plate 302. The heat conducting plate 302 is provided with second channels 3021 extending in the same direction as the first channels 3031. The second channels 3021 are connected to adjacent first channels 3031 through the connecting channel 3032.

[0075] As Figure 7 As shown, the connecting channel 3032 is vertically arranged along the partition 303, and the multiple first channels 3031 are connected in series through multiple connecting channels 3032 to ensure that the entire partition 303 is filled with cooling medium, and by arranging the second channel 3021 on the heat conducting plate 302, the second channel 3021 is connected with the first channel 3031 above it through the connecting channel 3032, so that the heat of the heat conducting plate 302 can be quickly transferred to the partition 303 through the flow of the cooling medium, and the heat of the two adjacent partitions 303 can be reduced through the cooling of the cooling part 304, thereby realizing simultaneous cooling of the double pipes inside the entire cooling device, and quickly achieving a cooling effect.

[0076] In addition, if Figure 4 and Figure 8As shown, the cross-section of the main body 301 of this embodiment is a profile setting, and the second cooling cavity 3011 is formed inside the profile. In order to ensure the strength of the main body 301, supporting ribs are provided in the profile, and each rib has a through notch to facilitate the flow of the cooling medium.

[0077] It should be pointed out that if Figure 3 and Figure 4 As shown, since the lower plane of the main body 301 abuts against the front cover 101 of the motor, the cooling medium entering the transverse cavity 3012 flows along the annular transverse cavity 3012. Since the temperature there is high, and since the cooling medium located in the longitudinal cavity 3013 also flows into the partition 303 through the first channel 3031, the cooling medium has high fluidity and covers a large area, thereby enhancing the cooling effect.

[0078] Furthermore, in order to facilitate the setting, Figure 5 As shown, a distribution pipe 305 is provided above the cooling unit 304. A communication cavity 3051 is formed within the distribution pipe 305 along its length. Distribution ports 3052 are formed on the distribution pipe 305, corresponding to the outlets 3043. Several distribution ports 3052 communicate with the communication cavity 3051. An external pipe 306 is also provided above the distribution pipe 305. The internal cavity of the external pipe 306 is connected to the communication cavity 3051 and is used to communicate with the inlet 3042 of the external cooling device.

[0079] In addition, if Figures 1 to 4 As shown, a cover plate 307 is provided above the main body 301, and the cover plate 307 is used to block the inner cavity of the main body 301. A sealed space 308 is formed between the cover plate 307, the heat conducting plate 302 and the main body 301. The cooling portion 304 and the partition plate 303 are provided in the sealed space 308;

[0080] A liquid inlet pipe is provided at the inlet 3042, and the liquid inlet pipe and one end of the external pipe 306 are connected to the outside of the cover plate 307. The cover plate 307 is provided to protect the cooling part 304 and prevent impurities from entering.

[0081] Preferably, the connecting shaft 2 passes through the cover plate 307 and the heat conducting plate 302 and is threadedly connected to the power output end of the motor body 1. A bearing 309 is provided between the connecting shaft 2, the cover plate 307, and the heat conducting plate 302. The connecting shaft 2 can transmit power from the motor body 1, and the provision of the bearing 309 increases the rotational flexibility of the connecting shaft 2. This embodiment uses a self-lubricating powder metallurgy bearing 309, and deep groove ball bearings 309 can also be used on the cover plate 307 and the heat conducting plate 302. The heat conducting plate 302 of this embodiment is made of, for example, aluminum alloy, brass, or stainless steel.

[0082] As a preferred embodiment, in this embodiment, the first cooling chamber 3041 is used to be filled with a liquid cooling medium, and the second cooling chamber 3011 is used to be filled with a gaseous cooling medium. With this arrangement, since the first cooling chamber 3041 is located outside the second cooling chamber 3011, the cooling portion 304 abuts against the heat conducting plate 302, and the heat conducting plate 302 transfers heat from the center of the front cover 101, the use of water cooling can achieve a better cooling effect. Providing a surrounding air cooling space on the outside helps maintain the overall temperature and avoid liquid leakage. Of course, both the first cooling chamber 3041 and the second cooling chamber 3011 can be filled with a gaseous or liquid cooling medium.

[0083] This embodiment also relates to an electric motor, such as Figures 9 to 12 As shown, the motor comprises a motor body 1, a motor cooling device (as described above) connected to the power output end of the motor body 1, and a shield 4 disposed outside the motor cooling device. The shield 4 is fastened to the outside of the front cover 101 of the motor body 1, and the connecting end of the connecting shaft 2 extends through the outside of the shield 4. The shield 4 is formed with a first through-hole 401 and a second through-hole 402 for inputting and outputting cooling medium to the first cooling chamber 3041, as well as a third through-hole 403 and a fourth through-hole 404 for inputting and outputting cooling medium to the second cooling chamber 3011.

[0084] In addition, the motor of this embodiment further includes a lifting ring 5 provided on the outside of the motor body 1 , and the lifting ring 5 is used to connect to an external lifting device when transporting the motor.

[0085] The motor of the present invention is arranged between the front cover 101 and the cooling part 304 through the heat conducting plate 302. The heat conducting plate 302 is directly in contact with the front cover 101, which improves the cooling effect of the front cover 101 and reduces the risk of components such as the bearing 309 being damaged due to high temperature, thereby extending the overall life of the motor.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A motor cooling device for high temperature environment, characterized by: It comprises a connecting shaft (2) connected to a power output shaft of a motor body (1), and a cooling assembly (3) pivotally sleeved on the outside of the connecting shaft (2); The cooling assembly (3) comprises a main body (301) arranged on the front cover (101) of the motor body (1), a heat conducting plate (302) arranged in the main body (301) and abutting against the front cover (101) of the motor body (1), a plurality of spaced partitions (303) are provided in the main body (301), a cooling portion (304) is provided between two of the partitions (303), a first cooling cavity (3041) arranged in a serpentine shape is formed inside the cooling portion (304), and an inlet (3042) and an outlet (3043) are provided at the upper end of the cooling portion (304); One end of the first cooling chamber (3041) is connected to the inlet (3042), and the other end is connected to the outlet (3043); A second cooling cavity (3011) is formed in the main body (301), and the second cooling cavity (3011) is arranged in a ring shape along the radial direction of the main body (301); a plurality of cooling parts (304) and the partitions (303) are arranged in the second cooling cavity (3011); The first cooling cavity (3041) and the second cooling cavity (3011) are used to contain cooling medium.

2. The motor cooling device for high temperature environment according to claim 1, characterized in that: The second cooling cavity (3011) comprises a transverse cavity (3012) abutting against the front cover (101) of the motor body (1), and a longitudinal cavity (3013) communicating with the transverse cavity (3012); The transverse cavity (3012) is provided with a first opening groove (3014), and the end of the longitudinal cavity (3013) away from the heat conducting plate (302) is provided with a second opening groove (3015); The cooling medium enters the second cooling cavity (3011) through the second opening groove (3015) and acts on the front cover (101) of the motor body (1) through the first opening groove (3014) to perform heat exchange.

3. The motor cooling device for high temperature environment according to claim 2, characterized in that: The main body (301) includes a bottom plate (3016) and a surrounding plate (3017) connected vertically, and the bottom plate (3016) and the surrounding plate (3017) are arranged in a rotating body; The transverse cavity (3012) is formed in the bottom plate (3016), and the longitudinal cavity (3013) is formed in the enclosure plate (3017); The heat conducting plate (302) is connected to the middle of the bottom plate (3016), a cavity is formed in the middle of the main body (301), and two ends of a plurality of the partitions (303) abut against the inner wall of the main body (301); A first channel (3031) communicating with the second cooling cavity (3011) is provided along the length direction of the partition (303), and the first channel (3031) passes through the partition (303) and the inner wall of the main body (301).

4. The motor cooling device for high temperature environment according to claim 3, characterized in that: A plurality of the first channels (3031) are arranged at intervals along the height direction of the partition (303), and a connecting channel (3032) is provided between two adjacent first channels (3031) to connect the two; The partition (303) and the cooling portion (304) are staggered and abutted against the heat conducting plate (302); a second channel (3021) extending in the same direction as the first channel (3031) is provided on the heat conducting plate (302); the second channel (3021) is connected to the adjacent first channel (3031) via a connecting channel (3032).

5. The motor cooling device for high temperature environment according to claim 3, characterized in that: A distribution pipe (305) is provided on the upper portion of the cooling portion (304), and a communication cavity (3051) is formed in the distribution pipe (305) and arranged along the length thereof; The distribution pipe (305) is formed with distribution ports (3052) corresponding to the outlets (3043), and a plurality of the distribution ports (3052) are connected to the communication cavity (3051); An external pipe (306) is further provided on the upper portion of the distribution pipe (305), the inner cavity of the external pipe (306) is connected to the communication cavity (3051), and the external pipe (306) is used to communicate with the inlet (3042) of the external cooling device.

6. The motor cooling device for high temperature environment according to claim 5, characterized in that: A cover plate (307) is provided above the main body (301), and the cover plate (307) is used to seal the inner cavity of the main body (301), and a sealed space (308) is formed between the cover plate (307), the heat conducting plate (302), and the main body (301); The cooling portion (304) and the partition (303) are arranged in a sealed space (308); A liquid inlet pipe is provided at the inlet (3042), and the liquid inlet pipe and one end of the external pipe (306) are connected to the outside of the cover plate (307).

7. The motor cooling device for high temperature environment according to claim 6, characterized in that: The connecting shaft (2) passes through the cover plate (307) and the heat conducting plate (302), and is screwed to the power output end of the motor body (1); A bearing (309) is provided between the connecting shaft (2), the cover plate (307) and the heat conducting plate (302).

8. The motor cooling device for high temperature environment according to claim 1, characterized in that: The first cooling cavity (3041) is used to be filled with a liquid cooling medium, and the second cooling cavity (3011) is used to be filled with a gaseous cooling medium.

9. An electric motor, characterized in that: It comprises a motor body (1), a motor cooling device according to any one of claims 1 to 8 connected to a power output end of the motor body (1), and a shield (4) provided on the outside of the motor cooling device; The protective cover (4) is buckled onto the outside of the front cover (101) of the motor body (1), and the connecting end of the connecting shaft (2) is provided through the outside of the protective cover (4); The shield (4) is formed with a first through hole (401) and a second through hole (402) for inputting and outputting a cooling medium to the first cooling cavity (3041), and a third through hole (403) and a fourth through hole (404) for inputting and outputting a cooling medium to the second cooling cavity (3011).

10. The electric motor according to claim 9, characterized in that: It also includes a lifting ring (5) arranged on the outside of the motor body (1), and the lifting ring (5) is used to connect with an external lifting device when transporting the motor.

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