CN220857777U

CN220857777U - Heat radiation structure of independent double-drive motor and electric vehicle

Info

Publication number: CN220857777U
Application number: CN202322557944.6U
Authority: CN
Inventors: 王舸; 殷德军
Original assignee: Nanjing Aotebo Electromechanical Technology Co ltd
Current assignee: Nanjing Aotebo Electromechanical Technology Co ltd
Priority date: 2023-09-20
Filing date: 2023-09-20
Publication date: 2024-04-26
Anticipated expiration: 2033-09-20

Abstract

The utility model discloses a heat radiation structure of an independent double-drive motor and an electric vehicle, wherein the independent double-drive motor comprises two groups of motors and two groups of reducers, and the heat radiation structure comprises: the motor comprises a motor cavity, a speed reducer cavity, a driver cavity, a heat conduction layer and a heat dissipation assembly; the speed reducer cavity is arranged on two sides of the motor cavity; the heat conducting layer is arranged at the top of the motor cavity; the driver cavity is arranged on the top of the heat conducting layer; the heat conducting layer absorbs heat of the motor cavity and the driver cavity; the heat-conducting layer is internally provided with a heat-radiating channel, cooling liquid flows into the heat-radiating channel, the cooling liquid flows into the heat-radiating component from the heat-conducting layer for cooling, and the cooling liquid after cooling flows into the heat-conducting layer. The utility model can simultaneously radiate heat for the motor and the motor driver.

Description

Heat radiation structure of independent double-drive motor and electric vehicle

Technical Field

The utility model relates to a heat radiation structure of an independent double-drive motor and an electric vehicle, and belongs to the technical field of motors.

Background

Modern electric machines, in order to pursue high power densities, typically employ a flowing medium such as a liquid or gas across the interstices between the motor rotor, stator and windings to rapidly carry away heat accumulated on the rotor, stator, coils and drive train.

In the existing design, a spray device for directly spraying cooling oil is arranged at the end part of a stator coil, or an oil duct is formed by axially and radially digging holes in the rotor rotating shaft, so that the cooling oil is sprayed. Although the two modes have good heat dissipation effect on the motor, the cost is high.

In the existing design, the fan is adopted to radiate heat for the driver, so that the defects of high noise and high electricity fee cost are achieved.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a heat dissipation structure of an independent double-drive motor and an electric vehicle, which can simultaneously dissipate heat for the motor and a motor driver. In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

In a first aspect, the present utility model provides a heat dissipation structure of an independent dual-drive motor, the independent dual-drive motor including two sets of motors and two sets of reducers, the heat dissipation structure comprising: the motor comprises a motor cavity, a speed reducer cavity, a driver cavity, a heat conduction layer and a heat dissipation assembly;

the speed reducer cavity is arranged on two sides of the motor cavity; the heat conducting layer is arranged at the top of the motor cavity; the driver cavity is arranged on the top of the heat conducting layer; the heat conducting layer absorbs heat of the motor cavity and the driver cavity;

The heat-conducting layer is internally provided with a heat-radiating channel, cooling liquid flows into the heat-radiating channel, the cooling liquid flows into the heat-radiating component from the heat-conducting layer for cooling, and the cooling liquid after cooling flows into the heat-conducting layer.

In combination with the first aspect, optionally, a motor is disposed in the motor cavity, the motor includes a rotor and a stator, a rotor cover plate is disposed on an end surface of the rotor, a protrusion is disposed on the rotor cover plate, and when the rotor rotates, cooling oil in the motor cavity flows down to an end portion of the stator under the protruding guide flow.

With reference to the first aspect, optionally, a heat conducting vertical plate for installing the power conversion device is arranged in the driver cavity, a heat dissipation pore canal communicated with the heat conducting layer is arranged in the heat conducting vertical plate, and the cooling liquid flows through the heat conducting vertical plate through the heat dissipation pore canal.

With reference to the first aspect, optionally, a heat exchanger is further included;

A first pore canal is arranged between the motor cavity and the speed reducer cavity, and lubricating oil in the speed reducer cavity adopts an oil body which is the same as cooling oil in the motor cavity;

The cooling oil flows into the speed reducer cavity from the motor cavity through the first pore canal, flows into the heat exchanger from the speed reducer cavity for cooling, and the cooled cooling oil flows into the motor cavity to form a circulation passage of the cooling oil;

And the cooling liquid in the heat conducting layer flows into the heat exchanger from the heat conducting layer to cool the cooling oil, then flows into the heat radiating assembly to cool, and the cooled cooling liquid flows into the heat conducting layer to form a circulation passage of the cooling liquid.

Cooling oil in the motor cavity flows into the heat exchanger from the motor cavity for cooling, and the cooled cooling oil flows into the motor cavity to form a circulation passage of the cooling oil;

With reference to the first aspect, optionally, the heat exchanger is an external heat exchange device.

With reference to the first aspect, optionally, the heat exchanger is a heat exchange tube integrated in the heat conducting layer, the heat exchange tube includes a water-cooled tube and an oil-cooled tube, the water-cooled tube is a part of a circulation path of the cooling liquid, and the oil-cooled tube is a part of a circulation path of the cooling oil; the water-cooled tube and the oil-cooled tube exchange heat in the heat conducting layer.

With reference to the first aspect, optionally, a first pore canal is arranged between the motor cavity and the speed reducer cavity, a second pore canal is arranged between the motor cavity and the heat conducting layer, and the cooling oil in the motor cavity, the lubricating oil in the speed reducer cavity and the cooling liquid in the heat conducting layer are all multifunctional liquids;

The multifunctional liquid flows into the motor cavity from the heat conduction layer through the second pore canal, flows into the speed reducer cavity from the motor cavity through the first pore canal, flows into the heat dissipation assembly from the speed reducer cavity for cooling, and flows into the heat conduction layer after cooling, so that a circulation passage of the multifunctional liquid is formed.

With reference to the first aspect, the heat dissipation assembly optionally further comprises a heat exchanger and external cooling liquid, wherein the heat dissipation assembly is used for cooling the external cooling liquid;

The multifunctional liquid flows into the motor cavity from the heat conduction layer through the second pore canal, flows into the speed reducer cavity from the motor cavity through the first pore canal, flows into the heat exchanger from the speed reducer cavity, exchanges heat with external cooling liquid in the heat exchanger, and flows into the heat conduction layer after cooling, so that a circulating passage of the multifunctional liquid is formed;

The external cooling liquid radiates heat through the radiating component, and the cooled external cooling liquid flows into the heat exchanger to cool the multifunctional liquid and then returns to the radiating component to radiate heat, so that a circulation passage of the external cooling liquid is formed.

In a second aspect, the present utility model provides an electric vehicle comprising the heat dissipation structure of the independent dual drive motor of the first aspect.

Compared with the prior art, the heat radiation structure of the independent double-drive motor and the electric vehicle provided by the embodiment of the utility model have the beneficial effects that:

The heat conducting layer is arranged on the top of the motor cavity, the driver cavity is arranged on the top of the heat conducting layer, and the heat conducting layer absorbs heat of the motor cavity and the driver cavity;

The end face of the motor rotor is provided with a rotor cover plate, the rotor cover plate is provided with a bulge, and when the rotor rotates, cooling oil in a motor cavity flows to the end part of a stator under the flow guide of the bulge; the utility model utilizes the rotation motion of the motor rotor to promote the cooling oil to radiate the coil at the end part of the stator; the bump structure has low cost and high reliability;

the heat-conducting vertical plate for installing the power conversion device is arranged in the cavity of the driver, a heat-radiating pore canal communicated with the heat-conducting layer is arranged in the heat-conducting vertical plate, and cooling liquid in the heat-conducting layer flows through the heat-conducting vertical plate through the heat-radiating pore canal; according to the utility model, heat can be dissipated for the power conversion device, and meanwhile, the heat conduction vertical plate for installing the power conversion device is arranged in the driver cavity, so that the size of the motor driver can be reduced, and the power density is improved.

Drawings

Fig. 1 is a schematic structural diagram of a heat dissipation mechanism of an independent dual-drive motor according to embodiment 1 of the present invention;

Fig. 2 is a schematic structural diagram of an independent dual-drive motor according to embodiment 1 of the present invention;

fig. 3 is a longitudinal sectional view of a heat dissipation mechanism of an independent dual-drive motor provided in embodiment 1 of the present invention;

Fig. 4 is a first heat dissipation schematic diagram of a heat dissipation mechanism of an independent dual-drive motor according to embodiment 2 of the present invention;

Fig. 5 is a second heat dissipation schematic diagram of a heat dissipation mechanism of an independent dual-drive motor according to embodiment 2 of the present invention;

fig. 6 is a cross-sectional view of a heat conducting layer in a second heat dissipation schematic diagram of a heat dissipation mechanism of an independent dual-drive motor according to embodiment 2 of the present invention;

Fig. 7 is a schematic heat dissipation diagram of a heat dissipation mechanism of an independent dual-drive motor according to embodiment 3 of the present invention;

Fig. 8 is a first heat dissipation schematic diagram of a heat dissipation mechanism of an independent dual-drive motor provided in embodiment 4 of the present invention;

Fig. 9 is a second heat dissipation schematic diagram of a heat dissipation mechanism of an independent dual-drive motor according to embodiment 4 of the present invention.

In the figure:

1. A motor cavity; 1-1, a left motor; 1-2, a right motor; 1-3, rotor cover plate;

2. A speed reducer cavity; 2-1, a left speed reducer; 2-2, right decelerator; 2-3, a speed reducer output shaft;

3. a driver cavity; 3-1, heat conducting vertical plates;

4. A heat conducting layer; 4-1, an oil cooling pipe; 4-1-1, cooling oil inlet; 4-2, a water cooling pipe; 4-2-1, a cooling liquid inlet;

5. A first duct; 6. a second orifice;

7. a heat sink; 8. a radiator pump;

9. A filter;

10. A heat exchanger; 11. a heat exchanger pump.

Description of the embodiments

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the terms "upper/lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured/arranged," "coupled," "connected," and the like are to be construed broadly and include, for example, "connected," either fixedly, detachably, or integrally; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1:

In this embodiment, a heat dissipation structure of an independent dual-drive motor is used in cooperation with the independent dual-drive motor.

As shown in fig. 2, the independent dual drive motor includes two sets of motors and two sets of reducers. The motor comprises a left motor 1-1 and a right motor 1-2, wherein the left motor 1-1 and the right motor 1-2 are arranged in parallel in a shape of a Chinese character 'two' in front-back. The speed reducer comprises a left speed reducer 2-1 and a right speed reducer 2-2, and the speed reducer adopts a parallel shaft speed reducing gear and/or a planetary speed reducing gear. The left speed reducer 2-1 is arranged at the left side of the left motor 1-1 and is connected with an output shaft of the left motor 1-1, and the torque and the rotating speed output by the left motor 1-1 are reduced and then output through a speed reducer output shaft 2-3. The right speed reducer 2-2 is arranged on the right of the right motor 1-2 and is connected with an output shaft of the right motor 1-2, and the torque and the rotating speed output by the right motor 1-2 are reduced and then output through a speed reducer output shaft 2-3.

As shown in fig. 1, a heat dissipation structure of an independent dual driving motor includes: the motor comprises a motor cavity 1, a speed reducer cavity 2, a driver cavity 3, a heat conduction layer 4 and a heat dissipation assembly. The heat conducting layer 4 is arranged at the top of the motor cavity 1, the driver cavity 3 is arranged at the top of the heat conducting layer 4, and the heat conducting layer 4 absorbs heat of the motor cavity 1 and the driver cavity 3. The heat conduction layer 4 is provided with a heat dissipation channel, cooling liquid flows into the heat dissipation channel from the heat conduction layer 4 to cool, and the cooled cooling liquid flows into the heat conduction layer 4 to absorb heat of the motor cavity 1 and the driver cavity 3.

The heat conduction layer 4 is a cavity formed by the bottom plate of the driver cavity 3 and the top plate of the motor cavity 1, so that the cost can be further reduced, and better heat exchange performance can be achieved.

In the embodiment, the heat conducting layer 4 is arranged between the motor cavity 1 and the driver cavity 3, so that heat can be dissipated for the motor and the motor driver at the same time.

The left motor 1-1 and the right motor 1-2 are respectively arranged in the left motor cavity 1 and the right motor cavity 1, and cooling oil is arranged in the motor cavity 1. The cooling oil is electrically insulating and is a low viscosity cooling oil that is advantageous in reducing the rotor rotational resistance.

The left motor 1-1 and the right motor 1-2 both comprise a rotor and a stator, the end face of the rotor is provided with a rotor cover plate 1-3, as shown in figure 3, the rotor cover plate 1-3 is provided with a bulge, and when the rotor rotates, cooling oil in the motor cavity 1 flows to the end part of the stator under the flow guide of the bulge. Preferably, the rotor cover plate 1-3 is also provided with a weight-reducing material for adjusting the dynamic balance of the rotor, and the protrusions are spirally and radially arranged. The heat dissipation of the cooling oil to the coil at the end part of the stator is promoted by utilizing the rotation motion of the motor rotor; meanwhile, the bump structure is low in cost and high in reliability.

The speed reducer cavity 2 is arranged at two sides of the motor cavity 1, and the left speed reducer 2-1 and the right speed reducer 2-2 are respectively arranged in the left speed reducer cavity 2 and the right speed reducer cavity 2. Lubricating oil is arranged in the speed reducer cavity 2.

Preferably, when the height of the decelerator chamber 2 is close to the height of the motor chamber 1, a larger area of the heat conductive layer 4 is used, covering both the top of the decelerator chamber 2 and the top of the motor chamber 1.

A heat conduction riser 3-1 for mounting a power conversion device for converting an external power source to drive the left motor 1-1 and the right motor 1-2 is provided in the driver chamber 3. The heat conduction riser 3-1 is internally provided with a heat dissipation pore canal communicated with the heat conduction layer 4, and cooling liquid in the heat conduction layer 4 flows through the heat conduction riser 3-1 through the heat dissipation pore canal, so that heat can be dissipated for the power conversion device, and meanwhile, the heat conduction riser 3-1 for installing the power conversion device is arranged in the driver cavity 3, so that the size of a motor driver can be reduced, and the power density is improved.

Example 2:

The present embodiment provides a heat dissipation mechanism of an independent dual-drive motor, and in this embodiment, further includes a heat exchanger 10;

A first pore canal 5 is arranged between the motor cavity 1 and the speed reducer cavity 2, and lubricating oil in the speed reducer cavity 2 adopts the same oil body as cooling oil in the motor cavity 1;

Cooling oil flows into the speed reducer cavity 2 from the motor cavity 1 through the first pore passage 5, flows into the heat exchanger 10 from the speed reducer cavity 2 for cooling, and the cooled cooling oil flows into the motor cavity 1 to form a cooling oil circulation passage;

The cooling liquid in the heat conducting layer 4 flows into the heat exchanger 10 from the heat conducting layer 4 to cool the cooling oil, then flows into the heat radiating component to cool, and the cooled cooling liquid flows into the heat conducting layer 4 to form a circulation passage of the cooling liquid.

The heat dissipation assembly comprises a radiator 7 and a radiator pump 8. The radiator 7 includes a fin through which the coolant flows to exchange heat, and a fan which radiates heat from the outside of the fin. The radiator pump 8 is used for pumping the cooled liquid into the heat conducting layer 4.

As shown in fig. 4, which is a first heat dissipation schematic diagram, the heat exchanger 10 of the present embodiment is an external heat exchange device. The present embodiment further comprises a heat exchanger pump 11, the heat exchanger pump 11 being adapted to pump cooling oil into the motor cavity 1.

Preferably, the first duct 5 may be disposed in a manner of grouping the motor cavity 1 with the decelerator cavity 2, and may be disposed in a manner of intersecting the motor cavity 1 with the decelerator cavity 2.

As shown in fig. 4, when the motor cavity and the reducer cavity are set in a group mode, the first duct is arranged between the motor cavity of the left motor and the reducer cavity of the left reducer and between the motor cavity of the right motor and the reducer cavity of the right reducer. One circulation path of the cooling oil is: heat exchanger-heat exchanger pump-motor cavity of left motor-speed reducer cavity of left speed reducer-heat exchanger. The other circulation path of the cooling oil is: heat exchanger-heat exchanger pump-motor cavity of right motor-speed reducer cavity of right speed reducer-heat exchanger. The two circulation paths of the cooling oil are basically symmetrical, and the heat dissipation effect is equivalent.

As shown in fig. 4, when the motor cavity and the reducer cavity are arranged in a crossing manner, the first pore canal is arranged between the motor cavity of the left motor and the reducer cavity of the right reducer and between the motor cavity of the right motor and the reducer cavity of the left reducer. One circulation path of the cooling oil is: heat exchanger-heat exchanger pump-motor cavity of left motor-speed reducer cavity of right speed reducer-heat exchanger. The other circulation path of the cooling oil is: heat exchanger-heat exchanger pump-motor cavity of right motor-speed reducer cavity of left speed reducer-heat exchanger. The two circulation paths of the cooling oil are basically symmetrical, and the heat dissipation effect is equivalent.

The circulation path of the coolant as shown in fig. 4 is: radiator-radiator pump-heat conducting layer-heat exchanger-radiator.

In this embodiment, the external heat exchange device has one or two sets. When the set of heat exchanger pump 11 is adopted, the cooling oil flowing out of the heat exchanger 10 is divided into two paths through the flow dividing device, and is pumped into the motor cavities 1 where different motors are positioned respectively, and the two cooling oil circulation paths are cooled respectively. When two sets of heat exchanger pumps 11 are adopted, the cooling oil flowing out of the heat exchanger 10 is pumped into the motor cavity 1 where the corresponding motor is located, and the two sets of heat exchangers 10 and the heat exchanger pumps 11 are used for cooling the circulation paths of the two cooling oils independently. Meanwhile, one or two sets of heat dissipation components are arranged.

As shown in fig. 5, which is a second heat dissipation schematic diagram, the heat exchanger 10 of the present embodiment is a heat exchange tube integrated in the heat conducting layer 4. The present embodiment further comprises a heat exchanger pump 11, the heat exchanger pump 11 being adapted to pump cooling oil into the motor cavity 1.

As shown in fig. 6, the heat exchange tube in the heat conductive layer 4 includes: the water-cooling pipe 4-2 and the oil-cooling pipe 4-1, the water-cooling pipe 4-2 being a part of a circulation path of the cooling liquid, and the oil-cooling pipe 4-1 being a part of a circulation path of the cooling oil. The cooling oil enters the oil cooling pipe 4-1 through the cooling oil inlet 4-1-1, and the cooling liquid enters the water cooling pipe 4-2 through the cooling liquid inlet 4-2-1. The water-cooled tube 4-2 and the oil-cooled tube 4-1 are capable of exchanging heat in the heat conductive layer 4. The water-cooled tube 4-2 and the oil-cooled tube 4-1 are arranged in the heat conductive layer 4 in a zigzag arrangement as shown in the figure, or in a conventional spiral arrangement.

As shown in fig. 6, when the motor cavity and the reducer cavity are set in a group manner, the first duct is disposed between the motor cavity of the left motor and the reducer cavity of the left reducer, and between the motor cavity of the right motor and the reducer cavity of the right reducer. One circulation path of the cooling oil is: oil cooling pipe, heat exchanger pump, motor cavity of left motor, speed reducer cavity of left speed reducer, oil cooling pipe. The other circulation path of the cooling oil is: oil cooling pipe, heat exchanger pump, motor cavity of right motor, speed reducer cavity of right speed reducer, oil cooling pipe. The two circulation paths of the cooling oil are basically symmetrical, and the heat dissipation effect is equivalent.

As shown in fig. 6, when the motor cavity and the reducer cavity are arranged in a crossing manner, the first pore canal is arranged between the motor cavity of the left motor and the reducer cavity of the right reducer and between the motor cavity of the right motor and the reducer cavity of the left reducer. One circulation path of the cooling oil is: oil cooling pipe, heat exchanger pump, motor cavity of left motor, speed reducer cavity of right speed reducer, and oil cooling pipe. The other circulation path of the cooling oil is: oil cooling pipe, heat exchanger pump, motor cavity of right motor, speed reducer cavity of left speed reducer, oil cooling pipe. The two circulation paths of the cooling oil are basically symmetrical, and the heat dissipation effect is equivalent.

As shown in fig. 6, the circulation path of the coolant is: water cooling pipe- & gt radiator pump- & gt water cooling pipe.

The form is an oil-water exchange heat dissipation mode, the technology is mature, but the price is high. As shown in fig. 4, the heat exchanger 10 is a schematic diagram of an external heat exchange device, in which a circulation path of cooling oil and a circulation path of cooling liquid exchange heat. As shown in fig. 6, the heat exchanger 10 is a schematic view of a heat exchange tube integrated in the heat conductive layer 4, and the circulation path of the cooling oil and the circulation path of the cooling liquid exchange heat in the heat conductive layer 4.

In this embodiment, the heat exchange tubes in the heat conducting layer 4 have a single circuit and a double circuit. When a single loop is adopted, the heat exchanger pump 11 divides the cooling oil flowing out of the oil cooling pipe 4-1 into two paths through a flow dividing device, and pumps the cooling oil into the motor cavities 1 where different motors are positioned respectively, so that the cooling oil can be cooled through the circulation paths of the two cooling oil respectively. When two sets of heat exchangers are adopted, each heat exchanger pump 11 pumps the cooling oil flowing out of the oil cooling pipe 4-1 into the motor cavity 1 where the corresponding motor is located, and the double-loop heat conduction pipe independently cools the circulation paths of the two cooling oils. Meanwhile, one set or two sets of heat dissipation components are arranged.

In this embodiment, a filter 9 is disposed in the circulation path of the cooling oil, and the filter 9 is disposed on the outlet pipe of the motor cavity 1 for filtering out impurities in the cooling oil, such as scrap iron and the like.

Preferably, the cooling liquid can also be arranged to flow through other external devices for providing heat to other external devices, such as the battery of an electric vehicle and the passenger space of an electric vehicle.

Preferably, the oil-cooled tube 4-1 is made of a magnetically conductive material such as iron-nickel.

Example 3:

cooling oil in the motor cavity 1 flows into the heat exchanger 10 from the motor cavity 1 for cooling, and the cooled cooling oil flows into the motor cavity 1 to form a circulation passage of the cooling oil;

The cooling liquid in the heat conducting layer 4 flows into the heat exchanger 10 from the heat conducting layer 4 to cool the cooling oil, and then flows into the heat radiating component to cool, and the cooled cooling liquid flows into the heat conducting layer 4 to form a circulation passage of the cooling liquid.

This form is an oil-water exchange heat dissipation mode, and compared with the oil-water exchange heat dissipation provided in embodiment 2, the lubricating oil in the speed reducer chamber 2 does not participate in the heat dissipation cycle. The speed reducer cavity 2 is adjacent to the motor cavity 1 through a cover plate, and heat of the speed reducer cavity 2 is transferred to cooling oil in the motor cavity 1 through the cover plate. In the embodiment, the lubricating oil in the speed reducer cavity 2 is separated from the cooling oil in the motor cavity 1, so that the lubrication effect of the speed reducer is facilitated, and the technology is mature but the price is high. The circulation path of the cooling oil and the circulation path of the cooling liquid can exchange heat in both the heat exchanger 10 and the heat conductive layer 4.

The heat exchanger 10 is an external heat exchange device or a heat exchange tube integrated in the heat conducting layer 4, and is also provided with a heat exchanger pump 11 for pumping cooling oil into the motor cavity 1.

As shown in fig. 7, taking an external heat exchange device as an example, one circulation path of the cooling oil is: heat exchanger-heat exchanger pump-motor cavity of left motor-heat exchanger. The other circulation path of the cooling oil is: heat exchanger-heat exchanger pump-motor cavity of right motor-heat exchanger. The two circulation paths of the cooling oil are basically symmetrical, and the heat dissipation effect is equivalent. The circulation path of the cooling liquid is as follows: radiator-radiator pump-heat conducting layer-heat exchanger-radiator.

In this embodiment, the external heat exchange device has one or two sets. The heat exchange tube in the heat conducting layer 4 has a single loop and a double loop. The heat dissipation assembly has one set or two sets. The same arrangement as in example 2 was employed.

Example 4:

The embodiment provides a heat dissipation mechanism of independent dual drive motor, is equipped with first pore 5 between motor cavity 1 and reduction gear cavity 2 in this embodiment, is equipped with second pore 6 between motor cavity 1 and the heat conduction layer 4, and the cooling oil in motor cavity 1, the lubricating oil in reduction gear cavity 2 and the coolant in the heat conduction layer 4 are multi-functional liquid.

As shown in fig. 8, the heat dissipation assembly is used for cooling the multifunctional liquid. The multifunctional liquid flows into the motor cavity 1 from the heat conducting layer 4 through the second pore canal 6, flows into the speed reducer cavity 2 from the motor cavity 1 through the first pore canal 5, flows into the heat radiating component from the speed reducer cavity 2 for cooling, and the cooled multifunctional liquid flows into the heat conducting layer 4 to form a circulating passage of the multifunctional liquid.

As shown in fig. 8, when the motor cavity and the reducer cavity are set in a group manner, the first duct is disposed between the motor cavity of the left motor and the reducer cavity of the left reducer, and between the motor cavity of the right motor and the reducer cavity of the right reducer. Radiator, radiator pump, heat conduction layer, motor cavity of left motor, speed reducer cavity of left speed reducer, radiator, and constitutes a circulation path of multifunctional liquid. Radiator, radiator pump, heat conduction layer, motor cavity of right motor, speed reducer cavity of right speed reducer, radiator, and forms another circulation path of multifunctional liquid.

As shown in fig. 8, when the motor cavity and the reducer cavity are arranged in a crossing manner, the first pore canal is arranged between the motor cavity of the left motor and the reducer cavity of the right reducer and between the motor cavity of the right motor and the reducer cavity of the left reducer. Radiator, radiator pump, heat conduction layer, motor cavity of left motor, speed reducer cavity of right speed reducer, radiator, and constitutes a multifunctional liquid circulation path. Radiator, radiator pump, heat conduction layer, motor cavity of right motor, speed reducer cavity of left speed reducer, radiator, and constitutes another circulation path of multifunctional liquid.

The heat dissipation assembly has one set or two sets. When a set of heat dissipation assembly is adopted, the two multifunctional liquid circulation passages are cooled through the split devices, so that the heat dissipation assembly has the advantage of low cost, but liquid leakage is avoided, and the heat dissipation capacity of the two sets of motors is reduced due to the liquid leakage. When two sets of heat dissipation components are adopted, the two sets of heat dissipation components independently cool two circulation paths of the multifunctional liquid, and the cost is high but the reliability is high.

As shown in fig. 9, the heat exchanger further comprises a heat exchanger 10, a heat exchanger pump 11 and external cooling liquid, and the heat dissipation assembly is used for cooling the external cooling liquid. The multifunctional liquid flows into the motor cavity 1 from the heat conducting layer 4 through the second pore canal 6, flows into the speed reducer cavity 2 from the motor cavity 1 through the first pore canal 5, flows into the heat exchanger 10 from the speed reducer cavity 2, exchanges heat with external cooling liquid in the heat exchanger 10, and flows into the heat conducting layer 4 after cooling, so that a circulating passage of the multifunctional liquid is formed;

The external cooling liquid radiates heat through the radiating component, and the cooled external cooling liquid flows into the heat exchanger 10 to cool the multifunctional liquid and returns to the radiating component to radiate heat, so that a circulation passage of the external cooling liquid is formed.

As shown in fig. 9, when the motor cavity and the reducer cavity are set in a group manner, the first duct is disposed between the motor cavity of the left motor and the reducer cavity of the left reducer, and between the motor cavity of the right motor and the reducer cavity of the right reducer. The heat exchanger, the heat exchanger pump, the heat conduction layer, the motor cavity of the left motor, the speed reducer cavity of the left speed reducer and the heat exchanger form a multifunctional liquid circulation passage. The heat exchanger, the heat exchanger pump, the heat conduction layer, the motor cavity of the right motor, the speed reducer cavity of the right speed reducer and the heat exchanger form another multifunctional liquid circulation passage. Radiator-radiator pump-heat exchanger-radiator, and can form external cooling liquid circulation channel.

In this embodiment, a filter 9 is disposed in the circulation path of the multifunctional liquid, and the filter 9 is disposed on the outlet pipe of the radiator 7 and is used for filtering out impurities, such as iron filings, in the multifunctional liquid.

Preferably, the external coolant can also be configured to flow through other external devices to provide heat to other external devices, such as the battery of an electric vehicle and the passenger space of an electric vehicle.

Preferably, the multi-functional liquid flow conduit is of magnetically permeable material such as iron nickel.

Example 5:

The present embodiment provides an electric vehicle including the heat radiation structure of the independent dual drive motor of any one of embodiments 1 to 4.

The heat dissipation structure of an independent dual-drive motor according to any one of embodiments 1 to 4 may also be used for a vehicle configured with left and right dual-drive motors for an aircraft, a ship, or the like.

In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims

1. The utility model provides a heat radiation structure of independent double drive motor, independent double drive motor includes two sets of motors and two sets of reducers, its characterized in that, heat radiation structure includes: the motor comprises a motor cavity, a speed reducer cavity, a driver cavity, a heat conduction layer and a heat dissipation assembly;

2. The heat radiation structure of independent dual drive motor as set forth in claim 1, wherein a motor is provided in the motor cavity, the motor comprises a rotor and a stator, a rotor cover plate is provided on an end face of the rotor, a protrusion is provided on the rotor cover plate, and when the rotor rotates, cooling oil in the motor cavity flows to an end of the stator under the guide of the protrusion.

3. The heat radiation structure of independent dual-drive motor as claimed in claim 1, wherein a heat conducting vertical plate for installing the power conversion device is arranged in the driver cavity, a heat radiation hole channel communicated with the heat conducting layer is arranged in the heat conducting vertical plate, and the cooling liquid flows through the heat conducting vertical plate through the heat radiation hole channel.

4. The heat dissipating structure of an independent dual drive motor of claim 1, further comprising a heat exchanger;

5. The heat dissipating structure of an independent dual drive motor of claim 1, further comprising a heat exchanger;

6. The heat dissipating structure of an independent dual drive motor as set forth in claim 4 or 5, wherein the heat exchanger is an external heat exchanging device.

7. The heat radiation structure of the independent dual driving motor as claimed in claim 4 or 5, wherein the heat exchanger is a heat exchange tube integrated in the heat conductive layer, the heat exchange tube including a water cooling tube, which is a part of a circulation path of the cooling liquid, and an oil cooling tube, which is a part of a circulation path of the cooling oil; the water-cooled tube and the oil-cooled tube exchange heat in the heat conducting layer.

8. The heat radiation structure of an independent double-drive motor according to claim 1, wherein a first pore canal is arranged between the motor cavity and the speed reducer cavity, a second pore canal is arranged between the motor cavity and the heat conduction layer, and cooling oil in the motor cavity, lubricating oil in the speed reducer cavity and cooling liquid in the heat conduction layer are all multifunctional liquids;

9. The heat radiation structure of the independent double-drive motor according to claim 8, further comprising a heat exchanger and an external cooling liquid, wherein the heat radiation component is cooled by the external cooling liquid;

10. An electric vehicle comprising the heat dissipation structure of an independent dual drive motor as claimed in any one of claims 1 to 9.