Permanent magnet traction motor

Abstract

The invention discloses a permanent magnet traction motor, which comprises a shell, the shell comprises an inner cover shell and an outer cover shell, a plurality of support ribs are uniformly arranged between the inner cover shell and the outer cover shell, and gaps between the adjacent support ribs are arranged as heat dissipation flow channels; a stator core is arranged on the inner side of the inner housing, a winding coil is arranged on the inner side of the stator core, a rotor core is arranged in the middle of the stator core, a rotating shaft is arranged in the middle of the rotor core, and the front end of the rotating shaft extends out of the front end of the inner housing; a drainage ring is arranged at the rear end of the shell, a collector ring is installed at the front end of the shell, and the drainage ring and the collector ring are both communicated with the heat dissipation flow channel. A cooling fan is arranged on the outer side face of the outer cover shell and connected with the drainage cover. A radiator is arranged at the bottom of the shell, and the two ends of the radiator are connected with the drainage ring and the collector ring respectively. The cooling fan is arranged on the side face of the shell, the cooling fan can blow air flow into the cooling flow channel, and heat generated in the motor is taken away through the air flow.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a permanent magnet traction motor. Background Art

[0002] With the continuous advancement of science and technology and the growing demand for efficient and portable devices, existing motor technology faces many challenges. The common motors on the market are mainly induction motors and permanent magnet synchronous motors. In recent years, with the development of EMU technology, most of the traction motors of EMUs use permanent magnet synchronous motors.

[0003] In the prior art, the invention patent with patent number CN201510199233.3 discloses a permanent magnet synchronous traction motor for EMUs, which adopts a new rotor magnetic circuit structure punching sheet, a compact rotor structure with high integration, and a detachable terminal box structure and lead structure. The terminal box can be easily disassembled, making the motor easy to install. The inner rotor U-shaped magnetic circuit permanent magnet structure is adopted, and the magnetic isolation bridge and fillet design are added to improve the starting and overload capacity of the motor. The transmission end rotor pressure ring integrates the rotor core pressing, permanent magnet end face pressing, rotor dynamic balancing, and inner sealing ring labyrinth sealing structure. It has the advantages of compact structure, small axial space occupation, and easy installation, and can be widely used in the field of locomotives and EMUs. The research and development and operation of this invention provide a practical basis for the development of permanent magnet traction motor structures with higher power, higher speed, and higher power density for permanent magnet motors.

[0004] The permanent magnet synchronous traction motor provided by the above patent has the advantages of relatively small size, relatively large power and high speed. However, this type of permanent magnet synchronous traction motor for EMUs does not have an efficient heat dissipation structure, and the heat dissipation effect needs to be improved. It will generate a lot of heat when running at high speed. If the heat cannot be discharged in time and effectively, it is easy to cause the motor to be damaged due to overheating. Summary of the invention

[0005] The purpose of the present invention is to provide a permanent magnet traction motor, aiming to improve the existing permanent magnet synchronous traction motor of a motor vehicle, which has no efficient heat dissipation structure, resulting in its heat dissipation effect needs to be strengthened. The motor will generate a large amount of heat when running at high speed. If the heat cannot be discharged in time and effectively, it is easy to cause the motor to be damaged due to overheating.

[0006] The present invention is achieved in that:

[0007] A permanent magnet traction motor comprises an outer shell, the outer shell comprises an inner cover shell and an outer cover shell, a plurality of support ribs are evenly arranged between the inner cover shell and the outer cover shell, and the gaps between adjacent support ribs are set as heat dissipation channels; a stator core is arranged on the inner side of the inner cover shell, a winding coil is arranged on the inner side of the stator core, a rotor core is arranged in the middle of the stator core, a rotating shaft is arranged in the middle of the rotor core, and the front end of the rotating shaft protrudes from the front end of the inner cover shell; a drainage ring is arranged at the rear end of the outer shell, and a merge ring is installed at the front end of the outer shell, and the drainage ring and the merge ring are both communicated with the heat dissipation channel; a cooling fan is arranged on the outer side of the outer cover shell, and the cooling fan is connected to the drainage cover; a radiator is arranged at the bottom of the outer shell, and the two ends of the radiator are respectively connected to the drainage ring and the merge ring.

[0008] Furthermore, an installation groove is provided between the front end of the outer shell and aligned with the inner cover shell, a front end cover is provided on the inner side of the front end of the inner cover shell, a transfer interface is provided in the middle of the front end cover, and a rear end cover is provided on the inner side of the rear end opening of the inner cover shell; the front end cover and the rear end cover are both sealed and connected to the inner cover shell; supporting feet are symmetrically provided at the bottom of both sides of the outer cover shell, fixing feet are provided at the bottom ends of the supporting feet, and a plurality of fixing holes are provided on the fixing feet; a mounting platform is provided on the side of the outer cover shell, and a transfer groove is provided in the middle of the mounting platform; a junction box is provided on the top of the outer cover shell, and a first plug-in slot and a second plug-in slot are respectively provided on the sides of the junction box; a stud is provided in the middle of the rear end cover, and a pressure cap is provided at one end of the stud passing through the drainage ring.

[0009] Furthermore, the stator core and the rotor core are formed by bonding a plurality of silicon steel sheets with glue, the inner side of the stator core is evenly provided with a plurality of wire embedding grooves, and the outer side of the stator core is evenly provided with a plurality of ventilation grooves from front to back; an axial hole is provided in the middle of the rotor core, and a plurality of permanent magnets are evenly embedded in the rotor core around the axial hole, and a plurality of ventilation holes are provided through the rotor core from front to back.

[0010] Furthermore, the positions where the rotating shaft fits the front end and the rear end of the rotor core are provided with pressing rings, and the rear end of the rotating shaft is connected to an impeller, and the front end of the rotating shaft protrudes from the transfer port.

[0011] Furthermore, a plurality of one-way valves are provided on the side of the drainage ring, and the one-way valves only allow external fluid to enter the drainage ring. A sealing gasket is provided on the side of the drainage ring facing the outer shell, and a plug connector is provided at the position of the drainage ring aligned with the heat dissipation channel, and the plug connector is communicated with the inner cavity of the drainage ring; a connecting plate is provided in the middle of the inner side of the drainage ring, and the connecting plate is connected to the drainage ring through a connecting rod; a sleeve hole is provided in the middle of the connecting plate, and the sleeve hole is sleeved on the stud; a first external pipe is provided at the bottom of the drainage ring.

[0012] Furthermore, a second external tube is provided at the bottom of the merge ring, a solenoid valve is provided on the side of the merge ring, an actuator is provided on the top of the solenoid valve, a first wire is provided on the top of the actuator, and a first connecting plug is provided at the end of the first wire; an adapter ring is provided at the position of the merge ring facing the installation groove.

[0013] Furthermore, a mounting ring is provided at one end of the cooling fan facing the outer casing, and the mounting ring is threadedly connected to the outer casing; a second wire is provided on the top of the cooling fan, and a second connecting plug is provided at the end of the second wire; a plurality of flow pipes are evenly arranged on the side of the cooling fan, and the flow pipes are connected to the one-way valve.

[0014] Furthermore, connecting plates are symmetrically provided at the front and rear ends of the bottom of the radiator, the connecting plates are L-shaped, and an exhaust fan is provided between the two connecting plates. A micro pump is provided at the rear end of the radiator, the water suction end of the micro pump is communicated with the inner cavity of the radiator, and the drainage end of the micro pump is connected to the bottom end of the drainage ring; the top of the front end of the radiator is connected to the bottom of the collector ring, and cooling water is filled in the radiator; an electrical connection box is provided at the rear end of the radiator, a third wire is provided in the middle of the electrical connection box, and a third connecting plug is provided at the end of the third wire; the drainage end of the micro pump and one end of the radiator aligned with the collector ring are both provided with mounting tubes.

[0015] Furthermore, it also includes a temperature sensor, wherein a mounting hole is provided at the top of the merge ring, a transfer column is provided at the top of the temperature sensor, the transfer column is threadedly connected to the mounting hole, a fourth wire is provided at the top of the temperature sensor, and a fourth connecting plug is provided at the end of the fourth wire.

[0016] Furthermore, the temperature sensor, cooling fan, radiator and solenoid valve are all connected to the junction box, and an MCU control module is provided inside the junction box, and the MCU control module is connected to a temperature threshold setting module and a safety protection module; the temperature threshold setting module is used in conjunction with the temperature sensor, and when the temperature sensor is higher than the set threshold, the solenoid valve is closed, and the radiator is started at the same time, so that the cooling water inside the radiator is pumped into the heat dissipation channel; when the temperature is lower than the threshold setting value, the radiator is stopped, and the solenoid valve and the cooling fan are opened, and air cooling is adopted for heat dissipation; the safety protection module is used to automatically reduce the output power of the motor in conjunction with the MCU control module when the temperature of the temperature sensor is still higher than the threshold setting in the water cooling mode, so as to avoid damage to the motor due to overheating.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention is provided with a cooling fan on the side of the shell, and the cooling fan can blow air into the heat dissipation flow channel, and the heat generated inside the motor is taken away by the air flow; at the same time, a plurality of ventilation slots are evenly arranged on the outer side of the stator core, and the heat generated inside the motor can be transferred to the shell through the ventilation slots, and finally the heat is taken away by the air flow; and the motor will start the water cooling mode when the air cooling cannot meet the heat dissipation demand. The water cooling mode is composed of a radiator, and the cold water inside the radiator is pumped into the heat dissipation flow channel through the micro pump at the end of the radiator. The cold water absorbs the heat generated inside the motor through the heat dissipation flow channel, so as to achieve the purpose of quickly and effectively dissipating the heat of the motor.

[0019] 2. The present invention installs a temperature sensor on the top of the slip ring, which can detect the temperature of the fluid inside the slip ring, so as to reduce the motor output power in time when the temperature is too high.

[0020] 3. The present invention can be disassembled and assembled according to the use requirements through the radiator and the merge ring, so that the air cooling structure can be used alone when water cooling is not required. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the overall partial decomposition of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the housing of the present invention at a front oblique downward angle;

[0024] Figure 4 It is a schematic diagram of the structure of the housing of the present invention at a rear end oblique upward viewing angle;

[0025] Figure 5 It is a structural schematic diagram of the stator core of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the rotor core of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the rotating shaft of the present invention;

[0028] Figure 8 It is a schematic diagram of the drainage ring structure of the present invention;

[0029] Fig. 9 is a schematic structural diagram of a slip ring of the present invention;

[0030] Fig.10 It is a structural schematic diagram of the heat dissipation fan of the present invention;

[0031] Fig.11 It is a structural schematic diagram of the radiator of the present invention;

[0032] Fig.12 It is a structural schematic diagram of the temperature sensor of the present invention;

[0033] Fig.13 It is a structural block diagram of the junction box of the present invention cooperating with various external components.

[0034] In the figure: 1. outer shell; 11. inner shell; 12. outer shell; 13. support rib; 14. mounting groove; 15. front cover; 151. adapter; 16. support foot; 161. fixing foot; 162. fixing hole; 17. mounting platform; 171. adapter groove; 18. junction box; 181. first plug-in slot; 182. second plug-in slot; 19. rear cover; 191. stud; 192. pressure cap; 2. stator core; 21. wire embedding slot; 22. ventilation slot; 3. rotor core; 4. winding coil; 41. ventilation hole; 42. permanent magnet; 43. shaft hole; 5. rotating shaft; 51. pressing ring; 52. impeller; 6. drainage ring; 61. one-way valve; 62. sealing gasket; 63. Plug connector; 64. Connecting plate; 65. Hole; 66. Connecting rod; 67. First external tube; 7. Collecting ring; 71. Second external tube; 72. Solenoid valve; 73. Actuator; 74. Adapter ring; 75. Mounting hole; 76. First wire; 77. First connecting plug; 8. Cooling fan; 81. Mounting ring; 82. Second wire; 83. Second connecting plug; 84. Flow pipe; 9. Radiator; 91. Connecting plate; 92. Exhaust fan; 93. Electrical box; 94. Micro pump; 95. Third wire; 96. Mounting tube; 97. Third connecting plug; 10. Temperature sensor; 101. Adapter column; 102. Fourth wire; 103. Fourth wire plug. DETAILED DESCRIPTION

[0035] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0036] Example 1

[0037] like Figure 1 , Figure 2 and Figure 3As shown, a permanent magnet traction motor comprises a shell 1, wherein the shell 1 comprises an inner shell 11 and an outer shell 12, wherein a plurality of support ribs 13 are evenly arranged between the inner shell 11 and the outer shell 12, and the gaps between adjacent support ribs 13 are set as heat dissipation channels. The inner shell 11 is used to absorb heat, thereby facilitating the heat dissipation of the entire motor. The outer shell 12 is used to protect the entire motor, and the support ribs 13 are used to ensure sufficient stability between the outer shell 12 and the inner shell 11, thereby ensuring that the shell 1 can stably install various components. A stator core 2 is arranged on the inner side of the inner shell 11, a winding coil 4 is arranged on the inner side of the stator core 2, a rotor core 3 is arranged in the middle of the stator core 2, a rotating shaft 5 is arranged in the middle of the rotor core 3, and the front end of the rotating shaft 5 protrudes from the front end of the inner shell 11. The stator core 2, the winding coil 4 and the rotating shaft 5 constitute the internal structure of the motor, ensuring that the motor can operate normally. A drainage ring 6 is provided at the rear end of the housing 1, and a merge ring 7 is installed at the front end of the housing 1. Both the drainage ring 6 and the merge ring 7 are connected to the heat dissipation channel. A cooling fan 8 is provided on the outer side of the outer cover shell 12, and the cooling fan 8 is connected to the drainage cover. The drainage ring 6 is convenient for cooperating with the cooling fan 8, so that the airflow blown by the cooling fan 8 can smoothly enter the heat dissipation channel, thereby achieving the purpose of heat dissipation of the motor, and the blown hot air flows out from the merge ring 7. A radiator 9 is provided at the bottom of the housing 1, and the two ends of the radiator 9 are respectively connected to the drainage ring 6 and the merge ring 7. Cooling water or other coolants are filled in the radiator 9. When the water cooling mode is started, the air outlet of the merge ring 7 will be closed. At this time, the radiator 9 works to pump the cooling water inside the drainage ring 6. After the cooling water enters the drainage ring 6, it flows to the merge ring 7 through the heat dissipation channel, and flows back to the radiator 9 through the bottom of the merge ring 7, and the hot water is re-cooled by the heat dissipation of the radiator 9. In this way, the purpose of water cooling the motor is achieved. When the radiator 9 stops working, the water inside the drainage ring 6 and the sink ring 7 will automatically flow back to the inside of the radiator 9 due to the effect of gravity.

[0038] like Figure 3 and Figure 4As shown, the front end of the housing 1 is aligned with the inner housing 11 and the outer housing 12 and is provided with a mounting groove 14, and the mounting groove 14 is convenient for installing the collector ring 7. A front cover 15 is provided on the inner side of the front end of the inner housing 11, and a transfer interface 151 is provided in the middle of the front cover 15, and a rear cover 19 is provided on the inner side of the rear opening of the inner housing 11. The front cover 15 and the rear cover 19 are both sealed and connected to the inner housing 11. This structure ensures that the internal space of the housing 1 is in a sealed state to prevent iron filings and magnetic powder from entering the motor. Support feet 16 are symmetrically provided at the bottom of both sides of the outer housing 12, and a fixing foot 161 is provided at the bottom of the support foot 16, and a plurality of fixing holes 162 are provided on the fixing foot 161. The support foot 16 cooperates with the fixing foot 161 and the fixing hole 162 to facilitate the fixing of the entire motor by bolts. A mounting platform 17 is provided on the side of the outer housing 12, and a transfer groove 171 is provided in the middle of the mounting platform 17. The cooperation between the mounting platform 17 and the transfer groove 171 is convenient for installing the cooling fan 8, and the cooling fan 8 can be flexibly disassembled and assembled. A junction box 18 is provided at the top of the outer cover shell 12. The junction box 18 is convenient for installing the control system of the motor and facilitating the operation of the entire motor. A first plug-in slot 181 and a second plug-in slot 182 are provided on the side of the junction box 18. The first plug-in slot 181 and the second plug-in slot 182 are convenient for connecting the junction box 18 to various components. A stud 191 is provided in the middle of the rear end cover 19. A pressure cap 192 is provided at one end of the stud 191 passing through the drainage ring 6. The bolt cooperates with the pressure cap 192 to facilitate fixing the drainage ring 6, and facilitates the disassembly and use of the drainage ring 6.

[0039] like Figure 5 and Figure 6 As shown, the stator core 2 and the rotor core 3 are composed of multiple silicon steel sheets bonded by glue, and the inner side of the stator core 2 is evenly provided with multiple wire embedding grooves 21, which are convenient for installing the winding coil 4. The outer side of the stator core 2 is evenly provided with multiple ventilation grooves 22 from front to back. The ventilation grooves 22 are convenient for the airflow inside the motor to circulate and flow, so as to facilitate the heat dissipation of the motor. An axial hole 43 is provided in the middle of the rotor core 3, and the axial hole 43 is convenient for connection with the rotating shaft 5. And the rotor core 3 is evenly inlaid with multiple permanent magnets 42 around the axial hole 43, and the permanent magnets 42 are convenient for the normal operation of the permanent magnet motor. The rotor core 3 is provided with multiple ventilation holes 41 from front to back, and the ventilation holes 41 cooperate with the ventilation grooves 22 to facilitate the airflow circulation inside the entire motor.

[0040] like Figure 7 As shown, the positions where the rotating shaft 5 fits the front and rear ends of the rotor core 3 are provided with pressing rings 51, which are convenient for pressing tightly on the rotor core 3 to ensure sufficient stability of the rotating shaft 5. The rear end of the rotating shaft 5 is connected to an impeller 52, and the front end of the rotating shaft 5 protrudes from the transfer port 151. The rotation of the impeller 52 is convenient for driving the airflow inside the motor to circulate.

[0041] like Figure 8As shown, a plurality of one-way valves 61 are provided on the side of the drainage ring 6. The one-way valves 61 only allow external fluid to enter the drainage ring 6. The one-way valves 61 are used to prevent cooling water from overflowing in the water cooling mode. A sealing gasket 62 is provided on the side of the drainage ring 6 facing the outer shell 1, and a plug connector 63 is provided at the position where the drainage ring 6 is aligned with the heat dissipation channel, and the plug connector 63 is communicated with the inner cavity of the drainage ring 6. The sealing gasket 62 is used to facilitate the sealing connection between the drainage ring 6 and the outer shell 1. A connecting plate 64 is provided in the middle of the inner side of the drainage ring 6, and the connecting plate 64 is connected to the drainage ring 6 through a connecting rod 66. This structure is convenient for the drainage ring 6 to be connected to the outer shell 1. A sleeve hole 65 is provided in the middle of the connecting plate 64, and the sleeve hole 65 is sleeved on the stud 191. This structure is convenient for the drainage ring 6 to be smoothly connected to the outer shell 1. A first external pipe 67 is provided at the bottom of the drainage ring 6, and the first external pipe 67 is convenient for connecting to the radiator 9.

[0042] like Fig. 9 As shown, the bottom of the merge ring 7 is provided with a second external pipe 71, and the second external pipe 71 is convenient for connecting with the radiator 9. A solenoid valve 72 is provided on the side of the merge ring 7, and the solenoid valve 72 is convenient for controlling whether the merge ring 7 can be exhausted. An actuator 73 is provided on the top of the solenoid valve 72, and the actuator 73 is used to control the operation of the solenoid valve 72. A first wire 76 is provided on the top of the actuator 73, and a first connecting plug 77 is provided at the end of the first wire 76. The first wire 76 and the first connecting plug 77 are convenient for connecting the solenoid valve 72 with the junction box 18, so as to facilitate the operation of the solenoid valve 72. An adapter ring 74 is provided at the position of the merge ring 7 facing the installation groove 14, and the adapter ring 74 is convenient for the installation and use of the merge ring 7.

[0043] like Fig.10 As shown, a mounting ring 81 is provided at one end of the heat dissipation fan 8 facing the housing 1, and the mounting ring 81 is threadedly connected to the housing 1. This structure is convenient for disassembly and assembly of the heat dissipation fan 8. A second wire 82 is provided at the top of the heat dissipation fan 8, and a second connecting plug 83 is provided at the end of the second wire 82. The cooperation of the second wire 82 and the second connecting plug 83 is convenient for powering on the heat dissipation fan 8. A plurality of through-flow pipes 84 are evenly provided on the side of the heat dissipation fan 8, and the through-flow pipes 84 are connected to the one-way valve 61. The through-flow pipes 84 are convenient for the airflow pumped by the heat dissipation fan 8 to smoothly pass through the drainage ring 6 into the heat dissipation channel.

[0044] like Fig.11As shown, the front and rear ends of the bottom of the radiator 9 are symmetrically provided with connecting plates 91, which are L-shaped, and an exhaust fan 92 is provided between the two connecting plates 91. The exhaust fan 92 is convenient for cooling the cooling water inside the radiator 9, so that the cooling water can be cooled quickly. A micro pump 94 is provided at the rear end of the radiator 9, and the water suction end of the micro pump 94 is connected to the inner cavity of the radiator 9, and the drainage end of the micro pump 94 is connected to the bottom end of the drainage ring 6. This structure is convenient for the micro pump 94 to pump the cooling water in the radiator 9 into the drainage ring 6. The top of the front end of the radiator 9 is connected to the bottom of the collector ring 7, and the radiator 9 is filled with cooling water. A power box 93 is provided at the rear end of the radiator 9, and a third wire 95 is provided in the middle of the power box 93, and a third connecting plug 97 is provided at the end of the third wire 95. The power box 93 cooperates with the third wire 95 and the third connecting plug 97 to facilitate the power connection and operation of the exhaust fan 92 and the micro pump 94. The drainage end of the micro pump 94 and the end of the radiator 9 aligned with the collector ring 7 are both provided with a mounting tube 96 , and the mounting tube 96 is used to facilitate the connection of the two ends of the radiator 9 with the drainage ring 6 and the collector ring 7 respectively.

[0045] Example 2

[0046] like Figure 1 , Figure 2 and Figure 3 As shown, a permanent magnet traction motor comprises a shell 1, wherein the shell 1 comprises an inner shell 11 and an outer shell 12, wherein a plurality of support ribs 13 are evenly arranged between the inner shell 11 and the outer shell 12, and the gaps between adjacent support ribs 13 are set as heat dissipation channels. The inner shell 11 is used to absorb heat, thereby facilitating the heat dissipation of the entire motor. The outer shell 12 is used to protect the entire motor, and the support ribs 13 are used to ensure sufficient stability between the outer shell 12 and the inner shell 11, thereby ensuring that the shell 1 can stably install various components. A stator core 2 is arranged on the inner side of the inner shell 11, a winding coil 4 is arranged on the inner side of the stator core 2, a rotor core 3 is arranged in the middle of the stator core 2, a rotating shaft 5 is arranged in the middle of the rotor core 3, and the front end of the rotating shaft 5 protrudes from the front end of the inner shell 11. The stator core 2, the winding coil 4 and the rotating shaft 5 constitute the internal structure of the motor, ensuring that the motor can operate normally.

[0047] A drainage ring 6 is provided at the rear end of the housing 1, and a merge ring 7 is installed at the front end of the housing 1. Both the drainage ring 6 and the merge ring 7 are connected to the heat dissipation channel. A cooling fan 8 is provided on the outer side of the outer cover shell 12, and the cooling fan 8 is connected to the drainage cover. The drainage ring 6 is convenient for cooperating with the cooling fan 8, so that the airflow blown by the cooling fan 8 can smoothly enter the heat dissipation channel, thereby achieving the purpose of heat dissipation of the motor, and the blown hot air flows out from the merge ring 7. A radiator 9 is provided at the bottom of the housing 1, and the two ends of the radiator 9 are respectively connected to the drainage ring 6 and the merge ring 7. Cooling water or other coolants are filled in the radiator 9. When the water cooling mode is started, the air outlet of the merge ring 7 will be closed. At this time, the radiator 9 works to pump the cooling water inside the drainage ring 6. After the cooling water enters the drainage ring 6, it flows to the merge ring 7 through the heat dissipation channel, and flows back to the radiator 9 through the bottom of the merge ring 7, and the hot water is re-cooled by the heat dissipation of the radiator 9. In this way, the purpose of water cooling the motor is achieved. When the radiator 9 stops working, the water inside the drainage ring 6 and the sink ring 7 will automatically flow back to the inside of the radiator 9 due to the effect of gravity.

[0048] like Figure 3 and Figure 4 As shown, the front end of the housing 1 is aligned with the inner housing 11 and the outer housing 12 and is provided with a mounting groove 14, and the mounting groove 14 is convenient for installing the collector ring 7. A front cover 15 is provided on the inner side of the front end of the inner housing 11, and a transfer interface 151 is provided in the middle of the front cover 15, and a rear cover 19 is provided on the inner side of the rear opening of the inner housing 11. The front cover 15 and the rear cover 19 are both sealed and connected to the inner housing 11. This structure ensures that the internal space of the housing 1 is in a sealed state to prevent iron filings and magnetic powder from entering the motor. Support feet 16 are symmetrically provided at the bottom of both sides of the outer housing 12, and a fixing foot 161 is provided at the bottom of the support foot 16, and a plurality of fixing holes 162 are provided on the fixing foot 161. The support foot 16 cooperates with the fixing foot 161 and the fixing hole 162 to facilitate the fixing of the entire motor by bolts. A mounting platform 17 is provided on the side of the outer housing 12, and a transfer groove 171 is provided in the middle of the mounting platform 17. The cooperation between the mounting platform 17 and the transfer groove 171 is convenient for installing the cooling fan 8, and the cooling fan 8 can be flexibly disassembled and assembled. A junction box 18 is provided at the top of the outer cover shell 12. The junction box 18 is convenient for installing the control system of the motor and facilitating the operation of the entire motor. A first plug-in slot 181 and a second plug-in slot 182 are provided on the side of the junction box 18. The first plug-in slot 181 and the second plug-in slot 182 are convenient for connecting the junction box 18 to various components. A stud 191 is provided in the middle of the rear end cover 19. A pressure cap 192 is provided at one end of the stud 191 passing through the drainage ring 6. The bolt cooperates with the pressure cap 192 to facilitate fixing the drainage ring 6, and facilitates the disassembly and use of the drainage ring 6.

[0049] like Figure 5 and Figure 6As shown, the stator core 2 and the rotor core 3 are composed of multiple silicon steel sheets bonded by glue, and the inner side of the stator core 2 is evenly provided with multiple wire embedding grooves 21, which are convenient for installing the winding coil 4. The outer side of the stator core 2 is evenly provided with multiple ventilation grooves 22 from front to back. The ventilation grooves 22 are convenient for the airflow inside the motor to circulate and flow, so as to facilitate the heat dissipation of the motor. An axial hole 43 is provided in the middle of the rotor core 3, and the axial hole 43 is convenient for connection with the rotating shaft 5. And the rotor core 3 is evenly inlaid with multiple permanent magnets 42 around the axial hole 43, and the permanent magnets 42 are convenient for the normal operation of the permanent magnet motor. The rotor core 3 is provided with multiple ventilation holes 41 from front to back, and the ventilation holes 41 cooperate with the ventilation grooves 22 to facilitate the airflow circulation inside the entire motor.

[0050] like Figure 7 As shown, the positions where the rotating shaft 5 fits the front and rear ends of the rotor core 3 are provided with pressing rings 51, which are convenient for pressing tightly on the rotor core 3 to ensure sufficient stability of the rotating shaft 5. The rear end of the rotating shaft 5 is connected to an impeller 52, and the front end of the rotating shaft 5 protrudes from the transfer port 151. The rotation of the impeller 52 is convenient for driving the airflow inside the motor to circulate.

[0051] like Figure 8 As shown, a plurality of one-way valves 61 are provided on the side of the drainage ring 6. The one-way valves 61 only allow external fluid to enter the drainage ring 6. The one-way valves 61 are used to prevent cooling water from overflowing in the water cooling mode. A sealing gasket 62 is provided on the side of the drainage ring 6 facing the outer shell 1, and a plug connector 63 is provided at the position where the drainage ring 6 is aligned with the heat dissipation channel, and the plug connector 63 is communicated with the inner cavity of the drainage ring 6. The sealing gasket 62 is used to facilitate the sealing connection between the drainage ring 6 and the outer shell 1. A connecting plate 64 is provided in the middle of the inner side of the drainage ring 6, and the connecting plate 64 is connected to the drainage ring 6 through a connecting rod 66. This structure is convenient for the drainage ring 6 to be connected to the outer shell 1. A sleeve hole 65 is provided in the middle of the connecting plate 64, and the sleeve hole 65 is sleeved on the stud 191. This structure is convenient for the drainage ring 6 to be smoothly connected to the outer shell 1. A first external pipe 67 is provided at the bottom of the drainage ring 6, and the first external pipe 67 is convenient for connecting to the radiator 9.

[0052] like Fig. 9 As shown, the bottom of the merge ring 7 is provided with a second external pipe 71, and the second external pipe 71 is convenient for connecting with the radiator 9. A solenoid valve 72 is provided on the side of the merge ring 7, and the solenoid valve 72 is convenient for controlling whether the merge ring 7 can be exhausted. An actuator 73 is provided on the top of the solenoid valve 72, and the actuator 73 is used to control the operation of the solenoid valve 72. A first wire 76 is provided on the top of the actuator 73, and a first connecting plug 77 is provided at the end of the first wire 76. The first wire 76 and the first connecting plug 77 are convenient for connecting the solenoid valve 72 with the junction box 18, so as to facilitate the operation of the solenoid valve 72. An adapter ring 74 is provided at the position of the merge ring 7 facing the installation groove 14, and the adapter ring 74 is convenient for the installation and use of the merge ring 7.

[0053] like Fig.10 As shown, a mounting ring 81 is provided at one end of the heat dissipation fan 8 facing the housing 1, and the mounting ring 81 is threadedly connected to the housing 1. This structure is convenient for disassembly and assembly of the heat dissipation fan 8. A second wire 82 is provided at the top of the heat dissipation fan 8, and a second connecting plug 83 is provided at the end of the second wire 82. The cooperation of the second wire 82 and the second connecting plug 83 is convenient for powering on the heat dissipation fan 8. A plurality of through-flow pipes 84 are evenly provided on the side of the heat dissipation fan 8, and the through-flow pipes 84 are connected to the one-way valve 61. The through-flow pipes 84 are convenient for the airflow pumped by the heat dissipation fan 8 to smoothly pass through the drainage ring 6 into the heat dissipation channel.

[0054] like Fig.11 As shown, the front and rear ends of the bottom of the radiator 9 are symmetrically provided with connecting plates 91, which are L-shaped, and an exhaust fan 92 is provided between the two connecting plates 91. The exhaust fan 92 is convenient for cooling the cooling water inside the radiator 9, so that the cooling water can be cooled quickly. A micro pump 94 is provided at the rear end of the radiator 9, and the water suction end of the micro pump 94 is connected to the inner cavity of the radiator 9, and the drainage end of the micro pump 94 is connected to the bottom end of the drainage ring 6. This structure is convenient for the micro pump 94 to pump the cooling water in the radiator 9 into the drainage ring 6. The top of the front end of the radiator 9 is connected to the bottom of the collector ring 7, and the radiator 9 is filled with cooling water. A power box 93 is provided at the rear end of the radiator 9, and a third wire 95 is provided in the middle of the power box 93, and a third connecting plug 97 is provided at the end of the third wire 95. The power box 93 cooperates with the third wire 95 and the third connecting plug 97 to facilitate the power connection and operation of the exhaust fan 92 and the micro pump 94. The drainage end of the micro pump 94 and the end of the radiator 9 aligned with the collector ring 7 are both provided with a mounting tube 96 , and the mounting tube 96 is used to facilitate the connection of the two ends of the radiator 9 with the drainage ring 6 and the collector ring 7 respectively.

[0055] like Fig. 9 and Fig.12 As shown, it also includes a temperature sensor 10, which is used to detect the temperature of the gas discharged from the heat dissipation channel, so as to start the water cooling mode when the temperature detection exceeds the threshold. A mounting hole 75 is provided on the top of the confluence ring 7, and a transfer column 101 is provided on the top of the temperature sensor. The transfer column 101 is threadedly connected to the mounting hole 75. This structure facilitates the disassembly and assembly of the temperature sensor 10. A fourth wire 102 is provided on the top of the temperature sensor 10, and a fourth connecting plug is provided at the end of the fourth wire 102. The fourth wire 102 and the fourth connecting plug are convenient for connecting the temperature sensor 10 to the junction box 18.

[0056] like Fig.13As shown, the temperature sensor 10, the cooling fan 8, the radiator 9 and the solenoid valve 72 are all connected to the junction box 18, and the junction box 18 is provided with an MCU control module, and the MCU control module is connected to the temperature threshold setting module and the safety protection module. The temperature threshold setting module is used in conjunction with the temperature sensor 10. When the temperature sensor 10 is higher than the set threshold, the solenoid valve 72 is closed, and the radiator 9 is started at the same time, so that the cooling water inside the radiator 9 is pumped into the heat dissipation channel. When the temperature is lower than the value set by the threshold, the radiator 9 is stopped, and the solenoid valve 72 and the cooling fan 8 are opened, and air cooling is adopted for heat dissipation. The safety protection module is used to automatically reduce the output power of the motor in conjunction with the MCU control module when the temperature of the temperature sensor 10 is still higher than the threshold setting in the water cooling mode, so as to prevent the motor from being damaged due to overheating.

[0057] Working principle: When in use, the temperature threshold is set through the temperature threshold setting module inside the junction box 18. When the motor is working, the shaft 5 rotates. When rotating, the impeller 52 at its rear end will also rotate. The rotation of the impeller 52 will drive the airflow inside the motor to circulate through the ventilation holes 41 and the ventilation slots 22. The heat generated by the motor will be absorbed by the inner cover 11 along with the airflow. In the air-cooling mode, the solenoid valve 72 is in the open state, and the cooling fan 8 will drive the airflow from the drainage ring 6 into the heat dissipation channel. The airflow will take away the heat absorbed by the inner cover 11, and finally the heat carried by the airflow will be discharged from the confluence ring 7. The temperature sensor 10 will detect the temperature inside the collector ring 7. When the detected temperature is higher than the threshold, the MCU control module inside the junction box 18 will control the electromagnetic valve 72 and the cooling fan 8 to close, and start the exhaust fan 92 and the micro pump 94 at the same time. The micro pump 94 draws the cooling water or other cooling medium inside the radiator 9 into the drainage ring 6, and enters the heat dissipation channel from the drainage ring 6. The cooling water absorbs the heat of the inner cover 11 through the heat dissipation channel to achieve the purpose of cooling and dissipating the heat of the motor. The cooling water after absorbing the heat returns to the radiator 9 through the collector ring 7. The exhaust fan 92 draws the air flow to cool the cooling water passing through the radiator 9, and the cooling water after cooling re-enters the heat dissipation channel, so as to achieve the purpose of water cooling and heat dissipation through circulation. When the temperature detected by the temperature sensor 10 is lower than the threshold, the MCU control module will control the radiator 9 to stop working, and open the electromagnetic valve 72 and the cooling fan 8 at the same time to start the air cooling mode. When the temperature sensor 10 senses that the temperature sensed in the water cooling mode is still continuously higher than the threshold, the safety protection module will be triggered. The safety protection module cooperates with the MCU control module to control the motor to automatically reduce the output power to avoid overheating and damage to the motor.

[0058] In summary, compared with the prior art, the present application is provided with a cooling fan 8 on the side of the housing 1, and the cooling fan 8 can blow air into the heat dissipation channel, and the heat generated inside the motor is taken away by the airflow. At the same time, the outer side of the stator core 2 is evenly provided with multiple ventilation grooves 22, and the heat generated inside the motor can be transferred to the housing 1 through the ventilation grooves 22, and finally the heat is taken away by the airflow. And when the air cooling cannot meet the heat dissipation demand, the motor will start the water cooling mode. The water cooling mode is composed of a radiator 9. The cold water inside the radiator 9 is pumped into the heat dissipation channel through the micro pump 94 at the end of the radiator 9. The cold water will absorb the heat generated inside the motor through the heat dissipation channel, so as to achieve the purpose of quickly and effectively dissipating the heat of the motor.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A permanent magnet traction motor, comprising a housing (1), characterized in that: The outer shell (1) comprises an inner shell (11) and an outer shell (12); a plurality of support ribs (13) are evenly arranged between the inner shell (11) and the outer shell (12); the gaps between adjacent support ribs (13) are provided as heat dissipation channels; a stator core (2) is provided on the inner side of the inner shell (11); a winding coil (4) is provided on the inner side of the stator core (2); a rotor core (3) is provided in the middle of the stator core (2); a rotating shaft (5) is provided in the middle of the rotor core (3); The front end of the rotating shaft (5) protrudes from the front end of the inner cover shell (11); the rear end of the outer shell (1) is provided with a drainage ring (6), and the front end of the outer shell (1) is installed with a collector ring (7), and the drainage ring (6) and the collector ring (7) are both connected to the heat dissipation flow channel; the outer side surface of the outer cover shell (12) is provided with a heat dissipation fan (8), and the heat dissipation fan (8) is connected to the drainage cover; the bottom of the outer shell (1) is provided with a radiator (9), and the two ends of the radiator (9) are respectively connected to the drainage ring (6) and the collector ring (7).

2. A permanent magnet traction motor according to claim 1, characterized in that: The front end of the outer shell (1) is aligned with the inner shell (11) and is provided with a mounting groove (14) between the outer shell (12); the inner side of the front end of the inner shell (11) is provided with a front cover (15); the middle of the front cover (15) is provided with a transfer interface (151); the inner side of the rear end opening of the inner shell (11) is provided with a rear cover (19); the front cover (15) and the rear cover (19) are both sealed and connected to the inner shell (11); the bottom of both sides of the outer shell (12) are symmetrically provided with support feet (16); the bottom ends of the support feet (16) are provided with fixed feet ( 161), the fixing foot (161) is provided with a plurality of fixing holes (162); a mounting platform (17) is provided on the side of the outer cover shell (12), and a transfer groove (171) is provided in the middle of the mounting platform (17); a junction box (18) is provided on the top of the outer cover shell (12), and a first plug-in groove (181) and a second plug-in groove (182) are respectively provided on the side of the junction box (18); a stud (191) is provided in the middle of the rear end cover (19), and a pressure cap (192) is provided at one end of the stud (191) passing through the drainage ring (6).

3. A permanent magnet traction motor according to claim 1, characterized in that: The stator core (2) and the rotor core (3) are formed by bonding a plurality of silicon steel sheets by means of glue; the inner side surface of the stator core (2) is evenly provided with a plurality of wire embedding grooves (21); the outer side surface of the stator core (2) is evenly provided with a plurality of ventilation grooves (22) from front to back; an axial hole (43) is provided in the middle of the rotor core (3); a plurality of permanent magnets (42) are evenly embedded in the rotor core (3) along the circumference of the axial hole (43); and a plurality of ventilation holes (41) are provided through the rotor core (3) from front to back.

4. A permanent magnet traction motor according to claim 2, characterized in that: The positions where the rotating shaft (5) fits the front end and the rear end of the rotor core (3) are both provided with pressing rings (51), and the rear end of the rotating shaft (5) is connected to an impeller (52), and the front end of the rotating shaft (5) protrudes from the transfer port (151).

5. A permanent magnet traction motor according to claim 2, characterized in that: A plurality of one-way valves (61) are provided on the side of the drainage ring (6), and the one-way valves (61) only allow external fluid to enter the drainage ring (6). A sealing gasket (62) is provided on the side of the drainage ring (6) facing the housing (1), and a plug connector (63) is provided at a position where the drainage ring (6) is aligned with the heat dissipation channel, and the plug connector (63) is communicated with the inner cavity of the drainage ring (6); a connecting plate (64) is provided in the middle of the inner side of the drainage ring (6), and the connecting plate (64) is connected to the drainage ring (6) through a connecting rod (66); a sleeve hole (65) is provided in the middle of the connecting plate (64), and the sleeve hole (65) is sleeved on the stud (191); and a first external pipe (67) is provided at the bottom of the drainage ring (6).

6. A permanent magnet traction motor according to claim 2, characterized in that: A second external pipe (71) is provided at the bottom of the merge ring (7), a solenoid valve (72) is provided on the side of the merge ring (7), an actuator (73) is provided on the top of the solenoid valve (72), a first wire (76) is provided on the top of the actuator (73), and a first connecting plug (77) is provided at the end of the first wire (76); and an adapter ring (74) is provided at a position of the merge ring (7) facing the mounting groove (14).

7. The permanent magnet traction motor according to claim 5, characterized in that: The heat dissipation fan (8) is provided with a mounting ring (81) at one end facing the outer shell (1), and the mounting ring (81) is threadedly connected to the outer shell (1); a second wire (82) is provided at the top of the heat dissipation fan (8), and a second connecting plug (83) is provided at the end of the second wire (82); a plurality of flow pipes (84) are evenly arranged on the side of the heat dissipation fan (8), and the flow pipes (84) are connected to the one-way valve (61).

8. The permanent magnet traction motor according to claim 1, characterized in that: The radiator (9) is symmetrically provided with connecting plates (91) at the front and rear ends of the bottom, the connecting plates (91) are L-shaped, and an exhaust fan (92) is provided between the two connecting plates (91). The radiator (9) is provided with a micro pump (94) at the rear end, the water suction end of the micro pump (94) is communicated with the inner cavity of the radiator (9), and the water discharge end of the micro pump (94) is connected to the bottom end of the drainage ring (6); the top of the front end of the radiator (9) is connected to the bottom of the collector ring (7), and cooling water is filled in the radiator (9); the radiator (9) is provided with an electrical connection box (93) at the rear end, a third wire (95) is provided in the middle of the electrical connection box (93), and a third connecting plug (97) is provided at the end of the third wire (95); the water discharge end of the micro pump (94) and the end of the radiator (9) aligned with the collector ring (7) are both provided with a mounting tube (96).

9. The permanent magnet traction motor according to claim 6, characterized in that: It also comprises a temperature sensor (10), wherein a mounting hole (75) is provided at the top of the merge ring (7), a transfer column (101) is provided at the top of the temperature sensor, the transfer column (101) is threadedly connected to the mounting hole (75), and a fourth wire (102) is provided at the top of the temperature sensor (10), and a fourth connecting plug is provided at the end of the fourth wire (102).

10. A permanent magnet traction motor according to claim 9, characterized in that: The temperature sensor (10), the cooling fan (8), the radiator (9) and the electromagnetic valve (72) are all connected to the junction box (18). An MCU control module is provided inside the junction box (18). The MCU control module is connected to a temperature threshold setting module and a safety protection module. The temperature threshold setting module is used in conjunction with the temperature sensor (10). When the temperature of the temperature sensor (10) is higher than the set threshold, the electromagnetic valve (72) is closed and the radiator (9) is started at the same time, so that cooling water inside the radiator (9) is pumped into the heat dissipation channel. When the temperature is lower than the value set by the threshold, the radiator (9) is stopped, and the electromagnetic valve (72) and the cooling fan (8) are opened to adopt air cooling for heat dissipation. The safety protection module is used to automatically reduce the output power of the motor in conjunction with the MCU control module when the temperature of the temperature sensor (10) is still higher than the threshold setting in the water cooling mode, so as to avoid the motor being damaged due to overheating.

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