Efficient permanent magnet synchronous motor internally provided with oil-water mixed cooling structure

Abstract

The invention belongs to the technical field of motors, and particularly relates to a high-efficiency permanent magnet synchronous motor with an internal oil-water mixed cooling structure, which comprises a motor shell, a stator mounting shell is arranged in the motor shell, a heat exchange channel is formed between the motor shell and the stator mounting shell, and an auxiliary cooling fin mounting groove is formed in the outer side of the stator mounting shell. An auxiliary cooling fin device is installed on the outer side of the stator installation shell through an auxiliary cooling fin installation groove, the auxiliary cooling fin device comprises a base, the base is inserted into the auxiliary cooling fin installation groove, an integrally-formed cooling fin is arranged on the outer side of the base, and a top oil-water mixing heat conduction device and a bottom oil-water mixing heat conduction device are arranged on the outer side of the stator installation shell. A cooling device mounting seat is mounted at the top of the motor shell, an oil-water integrated cooling mechanism is mounted at the top of the cooling device mounting seat, the cooling efficiency can be improved, meanwhile, through the integrated design of the conduction oil cooling mechanism and the cooling water cooling mechanism, the cooling efficiency is guaranteed, and the machining difficulty, cost and occupied space are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a high-efficiency permanent magnet synchronous motor with a built-in oil-water mixed cooling structure. Background Art

[0002] A permanent magnet synchronous motor is a motor that uses permanent magnet excitation to generate a synchronous rotating magnetic field. It has relatively high performance and efficiency. It is mainly composed of two parts, a stator and a rotor. Since a large amount of heat is generated during its operation, in order to ensure that it can work normally, the heat dissipation design is a very important part of the motor design. At present, the active heat dissipation means of the motor are basically divided into two types: air cooling and liquid cooling. Liquid cooling includes oil cooling, water cooling and oil-water mixed cooling. Among them, oil-water mixed cooling includes two sets of oil and water cooling systems, which can not only achieve complementary advantages, but also improve the reliability of the cooling system. In the prior art, some of these cooling systems use a cooling oil pipeline close to the stator, and the cooling water pipeline is located on the outside of the cooling oil pipeline to absorb the heat of the cooling oil. Although this method can achieve a good heat dissipation effect, there is still room for improvement in heat exchange efficiency. At the same time, the cooling mechanism of the cooling oil and the cooling mechanism of the cooling water have poor integration, need to occupy more space, and are also difficult and costly to process. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a high-efficiency permanent magnet synchronous motor with an internal oil-water mixed cooling structure. Through the contact between the side of the heat sink and the heat transfer oil heat exchange tube and the water-cooled heat exchange tube, the heat exchange area of ​​the heat transfer oil heat exchange tube is increased and the heat absorption efficiency of the heat transfer oil inside the heat transfer oil heat exchange tube is improved. At the same time, the heat transfer oil heat exchange tube can be skipped to directly transfer part of the heat to the cooling water in the water-cooled heat exchange tube to improve the cooling efficiency. At the same time, through the integrated design of the cooling mechanism of the heat transfer oil and cooling water, the cooling efficiency is guaranteed and the processing difficulty, cost and occupied space are reduced.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a high-efficiency permanent magnet synchronous motor with an oil-water mixed cooling structure, comprising a motor housing, a stator mounting shell is arranged inside the motor housing, a heat exchange channel is formed between the motor housing and the stator mounting shell, an auxiliary heat sink mounting groove is arranged on the outer side of the stator mounting shell, an auxiliary heat sink device is installed on the outer side of the stator mounting shell through the auxiliary heat sink mounting groove, the auxiliary heat sink device comprises a base, the base is inserted into the auxiliary heat sink mounting groove, an integrally formed heat sink is arranged on the outer side of the base, and the heat sink A screw-on plate is provided at the top and bottom of the motor, a top oil-water mixed heat-conducting device and a bottom oil-water mixed heat-conducting device are provided on the outside of the stator mounting shell, a cooling device mounting seat is installed on the top of the motor housing, an oil-water integrated cooling mechanism is installed on the top of the cooling device mounting seat, the oil-water integrated cooling mechanism comprises a heat transfer oil cooling bin installed above the cooling device mounting seat, a heat spreader is provided on the top of the heat transfer oil cooling bin, side wing heat sinks are provided on the sides of the heat transfer oil cooling bin, a top heat sink is provided on the top of the heat spreader, and a cooling water heat dissipation device is provided on the top of the top heat sink.

[0005] The beneficial effects of the present invention are as follows: when the device is in operation, the oil pump and the water pump respectively drive the heat transfer oil in the oil circuit and the cooling water in the water circuit to circulate, and the heat generated during the operation of the stator and the rotor is conducted to the stator mounting shell, and through the direct large-area contact between the stator mounting shell and the heat transfer oil heat exchange tube, the heat is conducted to the heat transfer oil heat exchange tube, and absorbed by the heat transfer oil in the heat transfer oil heat exchange tube, and at the same time, part of the heat is also conducted to the base and the heat sink, through the contact between the side of the heat sink and the heat transfer oil heat exchange tube and the water-cooled heat exchange tube, while increasing the heat exchange area of ​​the heat transfer oil heat exchange tube and improving the heat absorption efficiency of the heat transfer oil in the heat transfer oil heat exchange tube, it can also skip the heat transfer oil heat exchange tube and directly conduct part of the heat to the cooling water in the water-cooled heat exchange tube. Since the cooling water flows at a fast speed, it can effectively take away the heat on the heat transfer oil heat exchange tube and the heat sink, thereby ensuring the cooling efficiency.

[0006] When the device is running, the heat dissipation fan also rotates synchronously, and air is drawn in from both ends of the heat dissipation hole. The air flow quickly flows inside the heat dissipation hole and is drawn upward through the air outlet hole, flows through the heat dissipation pipe and the heat dissipation fins, and is discharged upward through the heat dissipation fan. After the heat transfer oil that has absorbed the heat flows back to the heat transfer oil cooling bin, it can stay in the heat transfer oil cooling bin for a long time through the arrangement of the internal partition and the maze-type channel, and the heat is discharged through the heat spreader and the side fins. The top of the heat spreader contacts with the top heat dissipation plate, and the air flow that quickly flows inside the heat dissipation hole of the top heat dissipation plate takes away the heat conducted to the top heat dissipation plate. The heat on the side fins is exchanged to the air through direct contact with the air over a large area. After the cooling water that has absorbed the heat enters the heat dissipation pipe, part of the heat is conducted to the heat dissipation fins. The air flow that flows through the heat dissipation pipe and the heat dissipation fins quickly takes away the heat on the heat dissipation pipe and the heat dissipation fins, thereby cooling the cooling water. Through the integrated design of the cooling mechanism of the heat transfer oil and the cooling water, the cooling efficiency is guaranteed, and the processing difficulty, cost and occupied space are reduced.

[0007] As a further improvement of the above technical solution: a stator is installed inside the stator mounting shell, a rotor is provided on the inner side of the stator, one end of the rotor is connected to the motor shaft, and a sealed bearing is provided between the stator mounting shell and the motor shaft.

[0008] To allow the thermal oil heat exchange tube and water-cooled heat exchange tube to pass through the curved parts:

[0009] As a further improvement of the above technical solution: a through groove is provided between the two side surfaces of the heat sink.

[0010] The beneficial effect of this improvement is that the through groove is used for the passage of the bending parts of the heat transfer oil heat exchange tube and the water cooling heat exchange tube.

[0011] To improve cooling efficiency:

[0012] As a further improvement of the above technical solution: the top oil-water mixed heat conduction device and the bottom oil-water mixed heat conduction device both include a heat-conducting oil heat exchange tube, and a water-cooling heat exchange tube is provided on the side of the heat-conducting oil heat exchange tube away from the stator mounting shell, and the input end and output end of the heat-conducting oil heat exchange tube are respectively connected to the input end heat-conducting oil joint and the return end heat-conducting oil joint, and the input end and output end of the water-cooling heat exchange tube are respectively connected to the input end water-cooling joint and the return end water-cooling joint.

[0013] The beneficial effects of this improvement are as follows: the heat generated during the operation of the stator and the rotor is conducted to the stator mounting shell, and through the direct large-area contact between the stator mounting shell and the heat transfer oil heat exchange tube, the heat is conducted to the heat transfer oil heat exchange tube, and absorbed by the heat transfer oil in the heat transfer oil heat exchange tube. At the same time, part of the heat is also conducted to the base and the heat sink. Through the contact between the side of the heat sink and the heat transfer oil heat exchange tube and the water-cooled heat exchange tube, the heat transfer area of ​​the heat transfer oil heat exchange tube is increased and the heat absorption efficiency of the heat transfer oil inside the heat transfer oil heat exchange tube is improved. At the same time, the heat transfer oil heat exchange tube can be skipped to directly conduct part of the heat to the cooling water in the water-cooled heat exchange tube. Since the cooling water flows at a fast speed, it can effectively take away the heat on the heat transfer oil heat exchange tube and the heat sink, thereby ensuring the cooling efficiency.

[0014] For cooling of thermal oil:

[0015] As a further improvement of the above technical solution: an internal partition is provided inside the thermal oil cooling bin, and the interior of the thermal oil cooling bin is divided into a maze-like passage by the internal partition.

[0016] The beneficial effect of this improvement is that after the heat-transfer oil that has absorbed the heat flows back to the heat-transfer oil cooling bin, it can stay in the heat-transfer oil cooling bin for a long time through the setting of internal partitions and maze-like channels, and the heat can be discharged through the heat spreader and side heat sinks.

[0017] In order to cool the thermal oil cooling chamber and heat pipe:

[0018] As a further improvement of the above technical solution: heat dissipation holes are provided between the two sides of the top heat dissipation plate, and air outlet holes are provided between the top of the top heat dissipation plate and the heat dissipation holes.

[0019] The beneficial effect of this improvement is that when the device is running, the cooling fan also rotates synchronously, and air is drawn in from both ends of the cooling hole. The air flows rapidly inside the cooling hole and is drawn upward through the air outlet. After flowing through the cooling pipe and cooling fins, it is discharged upward through the cooling fan, which can cool the thermal oil cooling bin and the cooling pipe.

[0020] To cool the cooling water:

[0021] As a further improvement of the above technical solution: the cooling water heat dissipation device includes a diversion chamber, one end of the diversion chamber is connected to the heat dissipation pipe, the other end of the heat dissipation pipe is connected to the confluence chamber, and heat dissipation fins are connected between two adjacent heat dissipation pipes. Cooling fans are installed on the top of the diversion chamber and the confluence chamber.

[0022] The beneficial effect of this improvement is that after the cooling water that has absorbed heat enters the heat pipe, part of the heat is transferred to the heat dissipation fins. The airflow passing through the heat pipe and the heat dissipation fins quickly removes the heat from the heat pipe and the heat dissipation fins, thereby cooling the cooling water.

[0023] For water delivery:

[0024] As a further improvement of the above technical solution: one end of the diversion chamber is connected to a water pump, the water pump is connected to the input end water cooling joint through a cooling water delivery pipe, and the confluence chamber is connected to the return end water cooling joint through a cooling water return pipe.

[0025] The beneficial effects of this improvement are: the water pump is used to pump out the cooling water in the diversion chamber, the water flow is transported between the diversion chamber and the water-cooled heat exchange tube through the cooling water delivery pipe, and the water flow is transported between the confluence chamber and the water-cooled heat exchange tube through the cooling water return pipe.

[0026] For the delivery of thermal oil:

[0027] As a further improvement of the above technical solution: one end of the thermal oil cooling tank is connected to an oil pump, the oil pump is connected to the input end thermal oil connector through a thermal oil delivery pipe, and the other end of the thermal oil cooling tank is connected to the thermal oil return pipe.

[0028] The beneficial effect of this improvement is that the oil pump is used to pump out the thermal oil in the thermal oil cooling bin, and the thermal oil is transported and refluxed between the thermal oil cooling bin and the thermal oil heat exchange pipe through the thermal oil transport pipe and the thermal oil return pipe.

[0029] As a further improvement of the above technical solution: two groups of auxiliary heat sink devices located on the same auxiliary heat sink installation groove are fixed to each other by bolting screw plates.

[0030] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of one side of the present invention (the side fins are not shown);

[0032] Figure 2 It is a schematic diagram of the structure of another side of the present invention (the side wing heat sink is not shown);

[0033] Figure 3 It is a partial isometric schematic diagram of the present invention (the side fins are not shown);

[0034] Figure 4 It is a schematic diagram of a partial structure of the present invention (the side fins are not shown);

[0035] Figure 5 It is a schematic diagram of the structure of the water circuit and the oil circuit in the present invention (the side fins are not shown);

[0036] Figure 6 It is a schematic diagram of a partial axonometric structure of the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of the stator mounting shell, the heat transfer oil heat exchange tube, and the water-cooled heat exchange tube in the present invention;

[0038] Figure 8 It is a schematic diagram of the separation structure of the oil-water integrated cooling mechanism in the present invention;

[0039] Fig. 9 It is a schematic diagram of the axonometric structure of the cooling water heat dissipation device in the present invention;

[0040] Fig.10 It is a structural schematic diagram of the auxiliary heat sink device in the present invention;

[0041] In the figure: 1. Motor housing; 2. Stator mounting shell; 3. Stator; 4. Rotor; 5. Motor shaft; 6. Sealed bearing; 7. Auxiliary heat sink mounting slot; 8. Auxiliary heat sink device; 9. Base; 10. Heat sink; 11. Screw plate; 12. Through slot; 13. Top oil-water mixed heat conduction device; 14. Bottom oil-water mixed heat conduction device; 15. Heat transfer oil heat exchange pipe; 16. Water-cooled heat exchange pipe; 17. Heat transfer oil connector at input end; 18. Water-cooled connector at input end; 19. Heat transfer oil connector at return end; 20. Water-cooled connector at return end Head; 21. Cooling device mounting base; 22. Thermal oil cooling chamber; 23. Internal partition; 24. Labyrinth channel; 25. Heat spreader; 26. Side fins; 27. Heat dissipation holes; 28. Air outlet holes; 29. ​​Cooling water heat dissipation device; 30. Diversion chamber; 31. Convergence chamber; 32. Heat dissipation pipe; 33. Heat dissipation fins; 34. Cooling fan; 35. Thermal oil return pipe; 36. Cooling water return pipe; 37. Thermal oil delivery pipe; 38. Cooling water delivery pipe; 39. Top heat sink; 40. Oil pump; 41. Water pump. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0043] like Figure 1-10As shown, a high-efficiency permanent magnet synchronous motor with an oil-water mixed cooling structure includes a motor housing 1, a stator mounting shell 2 is provided inside the motor housing 1, a heat exchange channel is formed between the motor housing 1 and the stator mounting shell 2, an auxiliary heat sink mounting groove 7 is provided on the outer side of the stator mounting shell 2, an auxiliary heat sink device 8 is installed on the outer side of the stator mounting shell 2 through the auxiliary heat sink mounting groove 7, the auxiliary heat sink device 8 includes a base 9, the base 9 is inserted into the auxiliary heat sink mounting groove 7, an integrally formed heat sink 10 is provided on the outer side of the base 9, and screw plates 11 are provided on the top and bottom of the heat sink 10. A top oil-water mixed heat-conducting device 13 and a bottom oil-water mixed heat-conducting device 14 are provided on the outside of the stator mounting shell 2, a cooling device mounting seat 21 is installed on the top of the motor housing 1, an oil-water integrated cooling mechanism is installed on the top of the cooling device mounting seat 21, and the oil-water integrated cooling mechanism includes a thermal oil cooling tank 22 installed above the cooling device mounting seat 21, a heat spreader 25 is provided on the top of the thermal oil cooling tank 22, side fins 26 are provided on the side of the thermal oil cooling tank 22, a top heat sink 39 is provided on the top of the heat spreader 25, and a cooling water heat dissipation device 29 is provided on the top of the top heat sink 39.

[0044] When the device is in operation, the oil pump 40 and the water pump 41 respectively drive the heat transfer oil in the oil circuit and the cooling water in the water circuit to circulate. The heat generated during the operation of the stator 3 and the rotor 4 is transferred to the stator mounting shell 2, and the heat is transferred to the heat transfer oil heat transfer tube 15 through the direct large-area contact between the stator mounting shell 2 and the heat transfer oil heat exchange tube 15, and is absorbed by the heat transfer oil in the heat transfer oil heat exchange tube 15. At the same time, part of the heat is also transferred to the base 9 and the heat sink 10. Through the contact between the side of the heat sink 10 and the heat transfer oil heat exchange tube 15 and the water-cooled heat exchange tube 16, the heat transfer area of ​​the heat transfer oil heat exchange tube 15 is increased and the heat absorption efficiency of the heat transfer oil in the heat transfer oil heat exchange tube 15 is improved. At the same time, the heat transfer oil heat exchange tube 15 can be skipped to directly transfer part of the heat to the cooling water in the water-cooled heat exchange tube 16. Since the cooling water flows at a fast speed, it can effectively take away the heat on the heat transfer oil heat exchange tube 15 and the heat sink 10, thereby ensuring the cooling efficiency.

[0045] When the device is running, the cooling fan 34 also rotates synchronously, and air is drawn in from both ends of the cooling hole 27. The air flows quickly inside the cooling hole 27 and is drawn upward through the air outlet 28. After flowing through the cooling pipe 32 and the cooling fins 33, it is discharged upward through the cooling fan 34. After the heat-conducting oil that has absorbed the heat flows back to the heat-conducting oil cooling chamber 22, it can stay in the heat-conducting oil cooling chamber 22 for a long time through the internal partition 23 and the maze-type channel 24, and the heat is discharged through the heat spreader 25 and the side fins 26. The top of the heat spreader 25 is in contact with the top heat sink 39. The rapidly flowing airflow inside the heat hole 27 takes away the heat conducted to the top heat sink 39, and the heat on the side heat sink 26 is exchanged to the air through direct contact with the air over a large area. After the cooling water that has absorbed the heat enters the heat pipe 32, part of the heat is conducted to the heat sink fins 33. The airflow flowing through the heat pipe 32 and the heat sink fins 33 quickly takes away the heat on the heat pipe 32 and the heat sink fins 33, thereby cooling the cooling water. The integrated design of the cooling mechanism of the heat transfer oil and the cooling water ensures the cooling efficiency and reduces the processing difficulty, cost and occupied space.

[0046] A stator 3 is installed inside the stator mounting shell 2 , a rotor 4 is provided inside the stator 3 , one end of the rotor 4 is connected to a motor shaft 5 , and a sealed bearing 6 is provided between the stator mounting shell 2 and the motor shaft 5 .

[0047] A through slot 12 is formed between the two side surfaces of the heat sink 10 .

[0048] The through groove 12 is used for the passage of the bending parts of the heat transfer oil heat exchange tube 15 and the water cooling heat exchange tube 16 .

[0049] The top oil-water mixed heat-conducting device 13 and the bottom oil-water mixed heat-conducting device 14 both include a heat-conducting oil heat exchange tube 15. A water-cooling heat exchange tube 16 is provided on the side of the heat-conducting oil heat exchange tube 15 away from the stator mounting shell 2. The input end and the output end of the heat-conducting oil heat exchange tube 15 are respectively connected to the input end heat-conducting oil joint 17 and the return end heat-conducting oil joint 19. The input end and the output end of the water-cooling heat exchange tube 16 are respectively connected to the input end water-cooling joint 18 and the return end water-cooling joint 20.

[0050] The heat generated during the operation of the stator 3 and the rotor 4 is conducted to the stator mounting shell 2, and the heat is conducted to the heat-conducting oil heat exchange tube 15 through the direct large-area contact between the stator mounting shell 2 and the heat-conducting oil heat exchange tube 15, and absorbed by the heat-conducting oil in the heat-conducting oil heat exchange tube 15. At the same time, part of the heat is also conducted to the base 9 and the heat sink 10. Through the contact between the side of the heat sink 10 and the heat-conducting oil heat exchange tube 15 and the water-cooled heat exchange tube 16, the heat exchange area of ​​the heat-conducting oil heat exchange tube 15 is increased and the heat absorption efficiency of the heat-conducting oil inside the heat-conducting oil heat exchange tube 15 is improved. At the same time, the heat-conducting oil heat exchange tube 15 can be skipped to directly conduct part of the heat to the cooling water in the water-cooled heat exchange tube 16. Since the cooling water flows at a fast speed, it can effectively take away the heat on the heat-conducting oil heat exchange tube 15 and the heat sink 10, thereby ensuring the cooling efficiency.

[0051] An internal partition 23 is provided inside the thermal oil cooling chamber 22 , and the interior of the thermal oil cooling chamber 22 is divided into a maze-like passage 24 by the internal partition 23 .

[0052] After the heat-conducting oil that has absorbed the heat flows back to the heat-conducting oil cooling chamber 22 , it can stay in the heat-conducting oil cooling chamber 22 for a long time due to the arrangement of the internal partition 23 and the labyrinth channel 24 , and the heat can be discharged through the heat spreader 25 and the side fins 26 .

[0053] A heat dissipation hole 27 is formed between two sides of the top heat dissipation plate 39 , and an air outlet hole 28 is formed between the top of the top heat dissipation plate 39 and the heat dissipation hole 27 .

[0054] When the device is in operation, the cooling fan 34 also rotates synchronously, and air is drawn in from both ends of the cooling hole 27. The air flows rapidly inside the cooling hole 27 and is drawn upward through the air outlet 28. After flowing through the cooling pipe 32 and the cooling fins 33, it is discharged upward through the cooling fan 34, which can cool the thermal oil cooling bin 22 and the cooling pipe 32.

[0055] The cooling water heat dissipation device 29 includes a diversion chamber 30, one end of the diversion chamber 30 is connected to a heat dissipation pipe 32, the other end of the heat dissipation pipe 32 is connected to a confluence chamber 31, a heat dissipation fin 33 is connected between two adjacent heat dissipation pipes 32, and a cooling fan 34 is installed on the top of the diversion chamber 30 and the confluence chamber 31.

[0056] After the cooling water that has absorbed the heat enters the heat pipe 32, a part of the heat is transferred to the heat dissipation fins 33. The airflow passing through the heat pipe 32 and the heat dissipation fins 33 quickly takes away the heat on the heat pipe 32 and the heat dissipation fins 33, thereby cooling the cooling water.

[0057] One end of the diversion chamber 30 is connected to a water pump 41 , and the water pump 41 is connected to the input end water cooling joint 18 via a cooling water delivery pipe 38 , and the confluence chamber 31 is connected to the return end water cooling joint 20 via a cooling water return pipe 36 .

[0058] The water pump 41 is used to pump out the cooling water in the diversion chamber 30 . The cooling water delivery pipe 38 delivers water between the diversion chamber 30 and the water-cooled heat exchange tube 16 . The cooling water reflux pipe 36 delivers water between the confluence chamber 31 and the water-cooled heat exchange tube 16 .

[0059] One end of the thermal oil cooling tank 22 is connected to an oil pump 40 , and the oil pump 40 is connected to the input end thermal oil connector 17 via a thermal oil delivery pipe 37 . The other end of the thermal oil cooling tank 22 is connected to a thermal oil return pipe 35 .

[0060] The oil pump 40 is used to pump out the thermal oil in the thermal oil cooling bin 22 . The thermal oil is transported and refluxed between the thermal oil cooling bin 22 and the thermal oil heat exchange pipe 15 via the thermal oil transport pipe 37 and the thermal oil return pipe 35 .

[0061] The two groups of auxiliary heat sink devices 8 located on the same auxiliary heat sink installation slot 7 are fixed to each other by bolting the screw-on plates 11 .

[0062] Working principle and use process of the present invention: When the device is in operation, the oil pump 40 and the water pump 41 respectively drive the heat transfer oil in the oil circuit and the cooling water in the water circuit to circulate, and the heat generated during the operation of the stator 3 and the rotor 4 is transferred to the stator mounting shell 2, and through the direct large-area contact between the stator mounting shell 2 and the heat transfer oil heat exchange tube 15, the heat is transferred to the heat transfer oil heat exchange tube 15, and absorbed by the heat transfer oil in the heat transfer oil heat exchange tube 15, and part of the heat is also transferred to the base 9 and the heat sink 10, through the contact between the side of the heat sink 10 and the heat transfer oil heat exchange tube 15 and the water-cooled heat exchange tube 16, while increasing the heat exchange area of ​​the heat transfer oil heat exchange tube 15, While improving the heat absorption efficiency of the heat transfer oil in the heat transfer oil heat exchange tube 15, it can also skip the heat transfer oil heat exchange tube 15 and directly transfer part of the heat to the cooling water in the water-cooled heat exchange tube 16. Since the cooling water flows at a fast speed, it can effectively take away the heat on the heat transfer oil heat exchange tube 15 and the heat sink 10 to ensure the cooling efficiency. The circulation path of the cooling water is sequentially the diversion chamber 30, the cooling water delivery pipe 38, the input end water cooling joint 18, the water-cooled heat exchange tube 16, the return end water cooling joint 20, the cooling water return pipe 36, the confluence chamber 31, the heat dissipation pipe 32, and the diversion chamber 30. The circulation path of the heat transfer oil is sequentially the heat transfer oil cooling chamber 22, the heat transfer oil delivery pipe 37, the input end heat transfer oil connection 20, the cooling water return pipe 36, the confluence chamber 31, the heat dissipation pipe 32, and the diversion chamber 30. The heat transfer oil head 17, the heat transfer oil heat exchange pipe 15, the return end heat transfer oil joint 19, the heat transfer oil return pipe 35, and the heat transfer oil cooling chamber 22. When the device is running, the heat dissipation fan 34 also rotates synchronously, and airflow is drawn in from both ends of the heat dissipation hole 27. The airflow flows quickly inside the heat dissipation hole 27 and is drawn upward through the air outlet 28. After flowing through the heat dissipation pipe 32 and the heat dissipation fins 33, it is discharged upward through the heat dissipation fan 34. After the heat transfer oil that has absorbed the heat flows back to the heat transfer oil cooling chamber 22, it can stay in the heat transfer oil cooling chamber 22 for a long time through the internal partition 23 and the maze channel 24. The heat is discharged through the heat spreader 25 and the side fins 26. The top of the heat spreader 25 is connected to the heat transfer oil cooling chamber 22. The top heat sink 39 is in contact with the top heat sink 39, and the airflow that quickly circulates through the heat dissipation holes 27 of the top heat sink 39 takes away the heat conducted to the top heat sink 39. The heat on the side heat sink 26 is exchanged to the air through direct contact with the air over a large area. After the cooling water that has absorbed the heat enters the heat pipe 32, part of the heat is conducted to the heat dissipation fins 33. The airflow that flows through the heat pipe 32 and the heat dissipation fins 33 quickly takes away the heat on the heat pipe 32 and the heat dissipation fins 33, thereby cooling the cooling water. Through the integrated design of the cooling mechanism of the heat transfer oil and the cooling water, the cooling efficiency is guaranteed, and the processing difficulty, cost and occupied space are reduced.

[0063] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0064] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A high-efficiency permanent magnet synchronous motor with an oil-water mixed cooling structure, characterized in that: The invention comprises a motor housing (1), wherein a stator mounting shell (2) is provided inside the motor housing (1), a heat exchange channel is formed between the motor housing (1) and the stator mounting shell (2), an auxiliary heat sink mounting groove (7) is provided on the outer side of the stator mounting shell (2), an auxiliary heat sink device (8) is installed on the outer side of the stator mounting shell (2) through the auxiliary heat sink mounting groove (7), the auxiliary heat sink device (8) comprises a base (9), the base (9) is inserted into the auxiliary heat sink mounting groove (7), an integrally formed heat sink (10) is provided on the outer side of the base (9), the top and bottom of the heat sink (10) are both provided with screw-on plates (11), and the stator mounting shell (2) is provided with a plurality of screw-on plates (12). A top oil-water mixed heat conduction device (13) and a bottom oil-water mixed heat conduction device (14) are provided on the outside; a cooling device mounting seat (21) is installed on the top of the motor housing (1); an oil-water integrated cooling mechanism is installed on the top of the cooling device mounting seat (21); the oil-water integrated cooling mechanism comprises a heat transfer oil cooling tank (22) installed above the cooling device mounting seat (21); a heat spreader (25) is provided on the top of the heat transfer oil cooling tank (22); side fins (26) are provided on the side of the heat transfer oil cooling tank (22); a top heat sink (39) is provided on the top of the heat spreader (25); and a cooling water heat dissipation device (29) is provided on the top of the top heat sink (39).

2. A high-efficiency permanent magnet synchronous motor with an oil-water mixed cooling structure according to claim 1, characterized in that: A stator (3) is installed inside the stator mounting shell (2), a rotor (4) is provided on the inner side of the stator (3), one end of the rotor (4) is connected to a motor shaft (5), and a sealed bearing (6) is provided between the stator mounting shell (2) and the motor shaft (5).

3. The high-efficiency permanent magnet synchronous motor with a built-in oil-water mixed cooling structure according to claim 1, characterized in that: A through groove (12) is provided between the two side surfaces of the heat sink (10).

4. The high-efficiency permanent magnet synchronous motor with a built-in oil-water mixed cooling structure according to claim 1, characterized in that: The top oil-water mixed heat conduction device (13) and the bottom oil-water mixed heat conduction device (14) both comprise a heat transfer oil heat exchange tube (15); a water cooling heat exchange tube (16) is provided on the side of the heat transfer oil heat exchange tube (15) away from the stator mounting shell (2); the input end and the output end of the heat transfer oil heat exchange tube (15) are respectively connected to an input end heat transfer oil joint (17) and a return end heat transfer oil joint (19); the input end and the output end of the water cooling heat exchange tube (16) are respectively connected to an input end water cooling joint (18) and a return end water cooling joint (20).

5. The high-efficiency permanent magnet synchronous motor with a built-in oil-water mixed cooling structure according to claim 1, characterized in that: An internal partition (23) is provided inside the thermal oil cooling bin (22), and the interior of the thermal oil cooling bin (22) is divided into a labyrinth-like channel (24) by the internal partition (23).

6. The high-efficiency permanent magnet synchronous motor with a built-in oil-water mixed cooling structure according to claim 1, characterized in that: A heat dissipation hole (27) is provided between the two sides of the top heat dissipation plate (39), and an air outlet hole (28) is provided between the top of the top heat dissipation plate (39) and the heat dissipation hole (27).

7. The high-efficiency permanent magnet synchronous motor with a built-in oil-water mixed cooling structure according to claim 1, characterized in that: The cooling water heat dissipation device (29) comprises a diversion chamber (30), one end of the diversion chamber (30) is connected to a heat dissipation pipe (32), the other end of the heat dissipation pipe (32) is connected to a confluence chamber (31), a heat dissipation fin (33) is connected between two adjacent heat dissipation pipes (32), and a heat dissipation fan (34) is installed on the top of the diversion chamber (30) and the confluence chamber (31).

8. The high-efficiency permanent magnet synchronous motor with a built-in oil-water mixed cooling structure according to claim 7, characterized in that: One end of the flow separation chamber (30) is connected to a water pump (41); the water pump (41) is connected to the input end water cooling joint (18) via a cooling water delivery pipe (38); and the confluence chamber (31) is connected to the return end water cooling joint (20) via a cooling water return pipe (36).

9. The high-efficiency permanent magnet synchronous motor with a built-in oil-water mixed cooling structure according to claim 1, characterized in that: One end of the thermal oil cooling bin (22) is connected to an oil pump (40), the oil pump (40) is connected to the input end thermal oil connector (17) via a thermal oil delivery pipe (37), and the other end of the thermal oil cooling bin (22) is connected to a thermal oil return pipe (35).

10. The high-efficiency permanent magnet synchronous motor with a built-in oil-water mixed cooling structure according to claim 1, characterized in that: Two groups of auxiliary heat sink devices (8) located on the same auxiliary heat sink installation groove (7) are fixed to each other via bolt-connected screw plates (11).

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