Oil-cooled motor

Abstract

The present invention discloses an oil-cooled motor, wherein the left side of the motor housing is fixedly connected to the right side of the front cover, the right side of the motor housing is fixedly connected to the left side of the rear cover, a rotating shaft is arranged in the middle of the motor housing, the left and right ends of the rotating shaft are movably connected to the middle of the front cover and the middle of the rear cover, and the inner wall of the motor housing is fixedly connected to the outer wall of the stator corresponding to the middle of the rotating shaft. The oil-cooled motor is provided with an oil inlet passage, the other end of which is connected to the first oil circuit, and the oil pump is operated to spray cooling oil into the first oil circuit on the terminal block through the oil inlet passage, and then enters the second oil circuit through the first oil circuit, so that the terminal block is fully provided with cooling oil through the first oil circuit and the second oil circuit, and at the same time, the cooling oil enters the terminal block through the hole on the rear cover, and the terminal block and the shell surface of the rear cover form a closed melting cavity, and the oil is sprayed onto the copper busbar through the three oil spray holes on the cavity, and then collected under the rear end cover and flows into the lower oil tank, so as to achieve cooling of the high-voltage copper busbar terminal block. It is suitable for automobiles.

Description

Technical Field

[0001] The invention relates to the technical field of oil-cooled motors, in particular to an oil-cooled motor. Background Art

[0002] A motor is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. The motor is represented by the letter M (D in the old standard) in the circuit. Its main function is to generate driving torque as a power source for electrical appliances or various machines. The generator is represented by the letter G in the circuit. Its main function is to convert mechanical energy into electrical energy. It is mainly determined by the left-hand rule based on the direction of the force on the conductor. This pair of electromagnetic forces forms a torque acting on the armature. This torque is called electromagnetic torque in the rotating motor. The direction of the torque is counterclockwise, attempting to make the armature rotate counterclockwise. If this electromagnetic torque can overcome the resistance torque on the armature (such as the resistance torque caused by friction and other load torques), the armature can rotate counterclockwise.

[0003] Existing oil-cooled motors: 1. Most oil-cooled motors rely on the oil cooling system of the reducer. After the reducer has been running for a long time, the cleanliness of the oil will decrease, and the accumulated impurities will damage the oil pump and paralyze the entire oil cooling system. Therefore, an independent and closed motor oil cooling system is necessary.

[0004] 2. The current oil-cooled motor only cools the stator part of the motor, ignoring the cooling of the high-voltage three-phase wiring copper busbar. The temperature of the high-voltage three-phase line may rise during long-term operation or under peak conditions, which may cause the plastic insulation seat here to reach the melting point.

[0005] 3. Some oil-cooled motors have no axial heat transfer oil; some oil-cooled motors have hollow motor shafts but no oil guide device. After the oil enters the hollow shaft, the oil reaches the oil outlet on the motor shaft by the pressure of the pump, which increases the demand for pump power. Summary of the invention

[0006] The purpose of the present invention is to provide an oil-cooled motor, which can cool the high-voltage three-phase copper busbar; increase the contact surface between the stator and the housing, and the contact surface between the stator winding and the cooling oil, so as to achieve the best cooling effect; add a spiral oil guide pipe in the motor shaft to reduce the energy consumption of the pump and increase the partial flow resistance, prolong the contact time between the oil and the shaft, and take away more rotor heat; form an oil internal circulation inside the motor to eliminate the oil cooling system of the whole vehicle.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an oil-cooled motor comprises a motor housing, wherein the left side of the motor housing is fixedly connected to the right side of the front cover, the right side of the motor housing is fixedly connected to the left side of the rear cover, the right side of the rear cover is fixedly connected to the left side of the wiring cover, a rotating shaft is arranged in the middle of the motor housing, the left and right ends of the rotating shaft are movably connected to the middle of the front cover and the middle of the rear cover, the inner wall of the motor housing is fixedly connected to the outer wall of the stator corresponding to the middle of the rotating shaft, the inner wall of the stator is wound with a coil, the bottom of the motor housing is fixedly connected to the top of the oil tank, the left side of the front of the oil tank is fixedly connected to the back of the oil pump, the right side of the front of the oil tank is fixedly connected to the back of the radiator, the right side of the oil pump is fixedly connected to the left end of the oil inlet pipe, the right end of the oil inlet pipe is fixedly connected to the left side of the front of the radiator, the right side of the front of the radiator is fixedly connected to the bottom end of the oil outlet pipe, the top of the oil outlet pipe is fixedly connected to the outer wall of the motor housing close to the top, a waterway oil inlet is provided at the bottom of the front of the radiator, and the top of the right side of the motor housing in the rear cover is fixedly connected to the left side of the wiring seat.

[0008] Preferably, a mounting hole is provided in the rotating shaft, the rotating shaft is interference fit with the spiral oil guide tube through the mounting hole, a spiral structure is provided on the outer wall of the spiral oil guide tube, a left rotating shaft oil outlet hole is provided near the left side of the rotating shaft, and a right rotating shaft oil outlet hole is provided on the right side of the rotating shaft.

[0009] Preferably, a guide rod oil outlet hole is opened in the middle of the rotating shaft, and the guide rod oil outlet hole passes through the spiral oil guide pipe and is connected to the spiral oil guide pipe. The length of the spiral oil guide pipe is half the length of the rotating shaft, and the guide rod oil outlet hole is distributed near the right end of the spiral oil guide pipe.

[0010] Preferably, a second oil circuit is opened in the middle of the left side of the terminal block, a first oil circuit is opened at the top of the left side of the terminal block, the middle of the first oil circuit is connected to the top of the second oil circuit, the first oil circuit and the second oil circuit are cross-distributed vertically, the bottom of the first oil circuit is connected to the oil outlet pipe, a through hole is opened near the middle of the left side of the terminal block, a third oil circuit is opened near the top of the through hole on the right side of the terminal block, the third oil circuit is connected to the through hole, and the through hole and the third oil circuit are distributed on the right side of the terminal block corresponding to both sides of the second oil circuit.

[0011] Preferably, the rear cover is provided with a rear cover oil inlet hole corresponding to the wiring seat, and the rear cover is provided with a reflux hole near the bottom of the rear cover oil inlet hole.

[0012] Preferably, a circumferential oil passage is provided on the inner wall of the motor housing, an oil inlet passage is provided at the top of the motor housing corresponding to the top of the circumferential oil passage, and the oil inlet passage is communicated with the top of the circumferential oil passage.

[0013] Preferably, a stator axial oil passage is provided on the outer wall of the stator, and outflow notches are provided on the left and right sides of the stator corresponding to the stator axial oil passage.

[0014] Preferably, the housing circumferential oil passages on the inner wall of the motor housing are longitudinally distributed on the inner wall of the motor housing, and the stator axial oil passages on the outer wall of the stator are transversely distributed on the outer wall of the stator.

[0015] Preferably, the third oil circuit of the wiring base is communicated with the oil inlet hole of the rear cover, and the through hole on the wiring base is communicated with the reflux hole.

[0016] Preferably, the oil outlet pipe and the oil inlet passage are connected correspondingly, and the oil inlet passage and the oil outlet pipe are communicated.

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

[0018] (1) The oil-cooled motor has an oil inlet passage, the other end of which is connected to the first oil passage. The oil pump is operated to spray cooling oil into the first oil passage on the terminal block through the oil inlet passage, and then into the second oil passage through the first oil passage. The terminal block is fully provided with cooling oil through the first oil passage and the second oil passage. At the same time, the cooling oil enters the terminal block through the hole on the rear cover. The terminal block and the shell surface of the rear cover form a closed melting cavity. The oil is sprayed onto the copper busbar through three oil spray holes on the cavity, and then collected under the rear end cover and flows into the lower oil tank, thereby cooling the high-voltage copper busbar terminal block.

[0019] (2) The oil-cooled motor can effectively form a circulating oil circuit by setting up the circumferential oil channel of the housing and the axial oil channel of the stator, and at the same time increase the contact surface between the stator and the motor housing, and the contact surface between the stator winding and the cooling oil, so as to achieve the best cooling effect, form an oil circulation inside the motor, and eliminate the oil cooling system of the whole vehicle.

[0020] (3) The oil-cooled motor can add a spiral oil guide pipe inside the motor shaft by setting a spiral oil guide pipe, thereby reducing the energy consumption of the oil pump and increasing the partial flow resistance, extending the contact time between the oil and the shaft, taking away more rotor heat, and at the same time, the cooling oil in the shaft flows more quickly, effectively utilizing the axial thrust and centrifugal force generated by the rotation speed of the shaft, and the assembly is simple and easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal section of the back side of the structure of the present invention;

[0023] Figure 3 Schematic diagram of the oil outlet hole structure distribution on the shaft;

[0024] Figure 4 This is a schematic diagram of the front structure of the oil guide rod;

[0025] Figure 5 It is a schematic diagram of the front cross-sectional structure of the oil guide rod;

[0026] Figure 6 This is a schematic diagram of the oil circuit distribution structure on the left side of the terminal block;

[0027] Figure 7 This is a schematic diagram of the oil circuit distribution structure on the right side of the terminal block;

[0028] Figure 8 It is a schematic diagram of the inner wall of the rear cover and the oil hole distribution structure;

[0029] Fig. 9 It is a schematic diagram of the oil channel distribution of the casing;

[0030] Fig.10 This is a schematic diagram of the stator oil channel distribution;

[0031] Fig.11 Schematic diagram of coil cooling structure.

[0032] In the figure: 1. front cover; 2. motor housing; 3. rear cover; 4. wiring cover; 5. oil tank; 6. radiator; 7. oil outlet pipe; 8. oil inlet pipe; 9. oil pump; 10. waterway oil inlet; 11. shaft; 12. terminal block; 13. stator; 14. coil; 15. spiral oil guide pipe; 16. left oil outlet hole of shaft; 17. right oil outlet hole of shaft; 18. oil outlet hole of guide rod; 19. oil inlet hole of rear cover; 20. reflux hole; 21. circumferential oil passage of housing; 22. axial oil passage of stator; 23. spiral structure; 24. outflow gap; 25. first oil passage; 26. second oil passage; 27. third oil passage; 28. through hole; 29. ​​oil inlet passage. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-11The present invention provides a technical solution: an oil-cooled motor comprises a motor housing 2, the inner wall of the motor housing 2 is provided with a housing circumferential oil passage 21, the housing circumferential oil passage 21 on the inner wall of the motor housing 2 is longitudinally distributed on the inner wall of the motor housing 2, an oil inlet passage 29 is provided at the top of the motor housing 2 corresponding to the top of the housing circumferential oil passage 21, an oil outlet pipe 7 is connected to the oil inlet passage 29 correspondingly, the oil inlet passage 29 is communicated with the oil outlet pipe 7, the oil inlet passage 29 is communicated with the top of the housing circumferential oil passage 21, the left side of the motor housing 2 is fixedly connected to the right side of the front cover 1, the right side of the motor housing 2 is fixedly connected to the left side of the rear cover 3, the right side of the rear cover 3 is fixedly connected to the left side of the wiring cover 4, a rotating shaft 11 is provided in the middle of the motor housing 2, a mounting hole is provided in the rotating shaft 11, and the rotating shaft 11 is interference-fitted with the spiral oil guide pipe 1 through the mounting hole 5. A spiral structure 23 is provided on the outer wall of the spiral oil guide pipe 15. A left shaft oil outlet hole 16 is provided near the left side of the rotating shaft 11. A right shaft oil outlet hole 17 is provided on the right side of the rotating shaft 11. A guide rod oil outlet hole 18 is provided in the middle of the rotating shaft 11. The guide rod oil outlet hole 18 penetrates the spiral oil guide pipe 15 and communicates with the spiral oil guide pipe 15. The length of the spiral oil guide pipe 15 is half the length of the rotating shaft 11. The guide rod oil outlet holes 18 are distributed near the right end of the spiral oil guide pipe 15. By setting the spiral oil guide pipe 15, a spiral oil guide pipe 15 can be added to the motor rotating shaft 11, thereby reducing the energy consumption of the oil pump 9 and increasing the partial flow resistance, prolonging the contact time between the oil and the shaft, taking away more rotor heat, and at the same time, the flow of the cooling oil in the shaft is faster, which effectively utilizes the rotation of the rotating shaft 11. The axial thrust and centrifugal force generated by the high speed are reduced, and the assembly is simple and easy. The left and right ends of the rotating shaft 11 are movably connected to the middle of the front cover 1 and the middle of the rear cover 3. The inner wall of the motor housing 2 corresponds to the middle of the rotating shaft 11 and is fixedly connected to the outer wall of the stator 13. The outer wall of the stator 13 is provided with a stator axial oil passage 22. The circumferential oil passage 21 of the housing and the stator axial oil passage 22 can effectively form a circulating oil circuit, and at the same time, the contact surface between the stator 13 and the motor housing 2 and the contact surface between the stator 13 winding and the cooling oil are increased to achieve the best cooling effect, and an oil internal circulation is formed inside the motor to eliminate the oil cooling system of the whole vehicle. The left and right sides of the stator 13 are provided with an outflow notch 24 corresponding to the stator axial oil passage 22, and the coil 14 can be cooled through the outflow notch 24. The stator 13 The stator axial oil passage 22 on the outer wall is laterally distributed on the outer wall of the stator 13, and the coil 14 is wound on the inner wall of the stator 13. The bottom of the motor housing 2 is fixedly connected to the top of the oil tank 5, the left side of the front of the oil tank 5 is fixedly connected to the back of the oil pump 9, and the right side of the front of the oil tank 5 is fixedly connected to the back of the radiator 6. The right side of the oil pump 9 is fixedly connected to the left end of the oil inlet pipe 8, and the right end of the oil inlet pipe 8 is fixedly connected to the left side of the front of the radiator 6. The right side of the front of the radiator 6 is fixedly connected to the bottom end of the oil outlet pipe 7, and the top of the oil outlet pipe 7 is fixedly connected to the outer wall of the motor housing 2 near the top. A water channel oil inlet 10 is opened at the bottom of the front of the radiator 6. The top right side of the motor housing 2 in the rear cover 3 is fixedly connected to the left side of the wiring seat 12, and a second oil circuit 26 is opened in the middle of the left side of the wiring seat 12. A first oil circuit 25 is opened at the top of the left side of the wiring seat 12.The middle of the first oil circuit 25 is connected with the top of the second oil circuit 26, the first oil circuit 25 and the second oil circuit 26 are cross-distributed vertically, the bottom of the first oil circuit 25 is connected with the oil outlet pipe 7, a through hole 28 is opened near the middle of the left side of the wiring seat 12, a third oil circuit 27 is opened near the top of the through hole 28 on the right side of the wiring seat 12, the third oil circuit 27 is connected with the through hole 28, and the through hole 28 and the third oil circuit 27 are distributed on the right side of the wiring seat 12 corresponding to the second oil circuit 26 on both sides, the rear cover 3 is opened with a rear cover oil inlet hole 19 corresponding to the wiring seat 12, the rear cover 3 is opened near the bottom of the rear cover oil inlet hole 19. The third oil circuit 27 of the wiring seat 12 is connected with the rear cover oil inlet hole 19, and the through hole 2 8 is connected to the return hole 20, and the other end of the oil inlet channel 29 is connected to the first oil circuit 25. When the oil pump 9 works, the cooling oil is sprayed into the first oil circuit 25 on the terminal block 12 through the oil inlet channel 29, and then enters the second oil circuit 26 through the first oil circuit 25. The terminal block 12 is fully provided with cooling oil through the first oil circuit 25 and the second oil circuit. At the same time, the cooling oil enters the terminal block 12 through the hole on the rear cover 3. The terminal block 12 and the shell surface of the rear cover 3 form a closed melting cavity. The oil is sprayed onto the copper busbar through the three oil injection holes on the cavity, and then flows into the lower oil tank 5 under the rear end cover, thereby cooling the high-pressure copper busbar terminal block.

[0035] When in use, the other end of the oil inlet passage 29 is connected to the first oil passage 25. The oil pump 9 works to spray cooling oil into the first oil passage 25 on the terminal block 12 through the oil inlet passage 29, and then enters the second oil passage 26 through the first oil passage 25. The terminal block 12 is fully provided with cooling oil through the first oil passage 25 and the second oil passage. At the same time, the cooling oil enters the terminal block 12 through the hole on the rear cover 3. The terminal block 12 and the shell surface of the rear cover 3 form a closed melting cavity. The oil is sprayed onto the copper busbar through the three oil spray holes on the cavity, and then collected under the rear end cover and flows into the lower oil tank 5, thereby cooling the high-pressure copper busbar terminal block and the surrounding of the shell. The axial oil passage 21 and the stator axial oil passage 22 can effectively form a circulating oil circuit, while increasing the contact surface between the stator 13 and the motor housing 2, and the contact surface between the stator 13 winding and the cooling oil, so as to achieve the best cooling effect, form an oil internal circulation inside the motor, eliminate the oil cooling system of the whole vehicle, add a spiral oil guide pipe 15 in the motor shaft 11, reduce the energy consumption of the oil pump 9, and increase the partial flow resistance, prolong the contact time between the oil and the shaft, take away more rotor heat, and at the same time the cooling oil in the shaft flows faster, effectively utilizing the axial thrust and centrifugal force generated by the rotation speed of the shaft 11, and the assembly is simple and easy.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including 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 device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil-cooled motor, comprising a motor housing (2), Features: The left side of the motor housing (2) is fixedly connected to the right side of the front cover (1), the right side of the motor housing (2) is fixedly connected to the left side of the rear cover (3), the right side of the rear cover (3) is fixedly connected to the left side of the wiring cover (4), a rotating shaft (11) is arranged in the middle of the motor housing (2), the left and right ends of the rotating shaft (11) are movably connected to the middle of the front cover (1) and the middle of the rear cover (3), the inner wall of the motor housing (2) is fixedly connected to the outer wall of the stator (13) corresponding to the middle of the rotating shaft (11), the inner wall of the stator (13) is wound with a coil (14), the bottom of the motor housing (2) is fixedly connected to the top of the oil tank (5), the oil tank (5) The left side of the front side is fixedly connected to the back side of the oil pump (9); the right side of the front side of the oil tank (5) is fixedly connected to the back side of the radiator (6); the right side of the oil pump (9) is fixedly connected to the left end of the oil inlet pipe (8); the right end of the oil inlet pipe (8) is fixedly connected to the left side of the front side of the radiator (6); the right side of the front side of the radiator (6) is fixedly connected to the bottom end of the oil outlet pipe (7); the top end of the oil outlet pipe (7) is fixedly connected to the outer wall of the motor housing (2) near the top; the bottom of the front side of the radiator (6) is provided with a water channel oil inlet (10); the top right side of the motor housing (2) in the rear cover (3) is fixedly connected to the left side of the wiring seat (12); A mounting hole is provided in the rotating shaft (11), the rotating shaft (11) is interference-fitted with the spiral oil guide tube (15) through the mounting hole, a spiral structure (23) is provided on the outer wall of the spiral oil guide tube (15), a left rotating shaft oil outlet hole (16) is provided near the left side of the rotating shaft (11), and a right rotating shaft oil outlet hole (17) is provided on the right side of the rotating shaft (11); A guide rod oil outlet hole (18) is provided in the middle of the rotating shaft (11), the guide rod oil outlet hole (18) penetrates the spiral oil guide pipe (15) and communicates with the spiral oil guide pipe (15), the length of the spiral oil guide pipe (15) is half the length of the rotating shaft (11), and the guide rod oil outlet hole (18) is distributed near the right end of the spiral oil guide pipe (15); A second oil circuit (26) is provided in the middle of the left side of the wiring base (12), a first oil circuit (25) is provided in the top of the left side of the wiring base (12), the middle of the first oil circuit (25) and the top of the second oil circuit (26) are connected, the first oil circuit (25) and the second oil circuit (26) are cross-distributed vertically, the bottom of the first oil circuit (25) is connected to the oil outlet pipe (7), a through hole (28) is provided near the middle of the left side of the wiring base (12), a third oil circuit (27) is provided near the top of the through hole (28) on the right side of the wiring base (12), the third oil circuit (27) and the through hole (28) are connected, and the through hole (28) and the third oil circuit (27) are distributed on the right side of the wiring base (12) corresponding to the second oil circuit (26) on both sides.

2. An oil-cooled motor according to claim 1, Features: The rear cover (3) is provided with a rear cover oil inlet hole (19) corresponding to the wiring seat (12), and the rear cover (3) is provided with a return hole (20) near the bottom of the rear cover oil inlet hole (19).

3. The oil-cooled motor according to claim 1, Features: The inner wall of the motor housing (2) is provided with a housing circumferential oil passage (21), and the top of the motor housing (2) is provided with an oil inlet passage (29) corresponding to the top of the housing circumferential oil passage (21), and the oil inlet passage (29) is communicated with the top of the housing circumferential oil passage (21).

4. The oil-cooled motor according to claim 1, Features: The outer wall of the stator (13) is provided with a stator axial oil passage (22), and outflow notches (24) are provided on the left and right sides of the stator (13) corresponding to the stator axial oil passage (22).

5. The oil-cooled motor according to claim 1, Features: The housing circumferential oil passages (21) on the inner wall of the motor housing (2) are longitudinally distributed on the inner wall of the motor housing (2), and the stator axial oil passages (22) on the outer wall of the stator (13) are transversely distributed on the outer wall of the stator (13).

6. The oil-cooled motor according to claim 1, Features: The third oil path (27) of the wiring base (12) is in communication with the oil inlet hole (19) of the rear cover, and the through hole (28) on the wiring base (12) is in communication with the return hole (20).

7. The oil-cooled motor according to claim 1, Features: The oil outlet pipe (7) and the oil inlet passage (29) are connected correspondingly, and the oil inlet passage (29) and the oil outlet pipe (7) are in communication.

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