CN113014040A - Water-cooling structure of axial segmented inner stator of outer rotor hub motor - Google Patents
Water-cooling structure of axial segmented inner stator of outer rotor hub motor Download PDFInfo
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- CN113014040A CN113014040A CN202110337327.8A CN202110337327A CN113014040A CN 113014040 A CN113014040 A CN 113014040A CN 202110337327 A CN202110337327 A CN 202110337327A CN 113014040 A CN113014040 A CN 113014040A
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- cooling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
Abstract
The invention relates to the technical field of hub motors, in particular to a water-cooling structure of an axial segmented inner stator of an outer rotor hub motor, which comprises the axial segmented inner stator, a radial waterway cooling disc, an axial connecting cooling pipe, a stator support frame and a fastening pressure plate, wherein the radial waterway cooling disc is arranged on the axial segmented inner stator; the stator adopts an axial segmented structure, radial water path cooling disks are arranged among the radial water path cooling disks, cooling water cools the segmented stator through the radial water path cooling disks and the axial connecting cooling pipe, a water path can fully contact the wall surface of a stator core, heat dissipation is increased, the temperature rise of the stator core and a winding is low, the phenomenon that the insulation aging of the stator core and the winding is accelerated due to overhigh temperature or even the motor is burnt out is avoided, and the outer rotor permanent magnet synchronous hub motor works in a safe and efficient range. The stator core sectional structure can also obviously reduce the eddy current loss of the stator core and reduce heat generation.
Description
Technical Field
The invention relates to the technical field of hub motors, in particular to a water-cooling structure of an axial segmented inner stator of an outer rotor hub motor.
Background
Due to energy shortage and environmental pollution, new energy automobiles with energy conservation and environmental protection become the development trend of the automobile industry. The hub motor is combined with a power electronic device, so that the hub motor has the advantages of high integration level, high transmission efficiency, simplified chassis structure, flexible layout, independent control of four wheels, automobile space saving and the like. However, the hub motor, the speed reducing mechanism and the brake are integrated in the wheel by the hub motor driving system, so that air flow is not smooth in a narrow space of the wheel, and heat dissipation is difficult. Meanwhile, the internal space of the hub motor is small, the loss density is high, the requirement on the sealing performance is high, internal heat is difficult to discharge in the operation process of the motor, the temperature of a stator core and a winding is increased, the motor is overheated, and even the motor is burnt out, so that the safe and stable operation of the motor is seriously influenced, and therefore, the efficient hub motor cooling structure is designed, and the important significance is achieved for prolonging the service life of the hub motor and improving the performance of the whole vehicle.
Disclosure of Invention
The invention aims to provide a water-cooling structure of an axial segmented inner stator of an outer rotor hub motor, which can effectively reduce the temperature of a stator core and a stator winding, avoid the accelerated insulation aging of the stator core and the stator winding caused by overhigh temperature and even burn out the motor, and ensure that the outer rotor permanent magnet synchronous hub motor works in a safe and efficient range.
The technical scheme of the invention is as follows.
A water-cooling structure of an axially segmented inner stator of an outer rotor hub motor, comprising: the stator comprises a first group of fastening bolts (1), a second group of fastening bolts (22) and a stator support frame (13); a first stator fastening pressure plate (2) and a second stator fastening pressure plate (21); a total water inlet pipe (4) and a total water outlet pipe (3); a first water inlet ring (5) and a second water inlet ring (20); a first outer cooling plate (6) and a second outer cooling plate (19); a first inner cooling plate (9) and a second inner cooling plate (16); a cushion block group I (10) and a cushion block group II (15); a first group of cooling through pipes (7) and a second group of cooling through pipes (18); a first group of cooling semi-through pipes (11) and a second group of cooling semi-through pipes (14); a first block stator (8), a second block stator (12) and a third block stator (17); the water inlet structure comprises a main water inlet pipe (4), a first group of fastening bolts (1), a first stator fastening pressure plate (2), a first water inlet ring (5), a first outer cooling plate (6), a first group of cooling through pipes (7), a first blocking stator (8), a first inner cooling plate (9), a first cushion block group (10), a first group of cooling half through pipes (11), a second blocking stator (12), a second group of cooling half through pipes (14), a second cushion block group (15), a second inner cooling plate (16), a third stator blocking block (17), a second group of cooling through pipes (18), a second outer cooling plate (19), a second water inlet ring (20), a second stator fastening pressure plate (21) and a second group of fastening bolts (22) which are arranged in sequence along the axial direction.
The further technical scheme is as follows: the stator strut (13) is arranged at the inner ring of the stator, three stators (8, 12 and 17) and four cooling discs (6, 9, 16 and 19) are all sleeved on the stator strut (13) and coaxial with the stator strut, the inner rings of the three stators (8, 12 and 17) and the four cooling discs (6, 9, 16 and 19) are tightly attached to the surface of the outer ring of the stator strut (13) and position the three stators (8, 12 and 17) through the surface grooves of the inner rings, and the segmented stators (8, 12 and 17) are fastened through the stator fastening pressure discs (2 and 21) and the cushion block groups (10 and 15). The water outlet hole of the outer ring of the water inlet ring I (5) is welded with the water inlet hole of the outer cooling disc I (6), the outer cooling disc I (6) is tightly attached to one end face of the block stator I (8) through high-heat-conductivity epoxy resin, and the water outlet hole of the inner ring of the water inlet ring I (5) is welded with one end of the first group of cooling through pipes (7); through holes are formed in yoke parts of the blocking stators (8, 12 and 17) along the circumferential direction, the diameters of the through holes are the same as the diameters of the through pipes (7, 11, 14 and 18), the first group of cooling through pipes (7) penetrate through the first stator blocking part (8), the other ends of the first group of cooling through pipes are welded with a circumferential water inlet of the first inner cooling disc (9), a circumferential water outlet of the first inner cooling disc (9) is welded with a water inlet end of the first group of cooling semi-through pipes (11), and the first group of cooling semi-through pipes (11) penetrate into the middle part through holes of the yoke parts of the second blocking stator (12); the outer ring of the first inner cooling disc (9) is provided with a first cushion block group (10), the thickness of the first cushion block group (10) is the same as that of the first inner cooling disc (9), and the first inner cooling disc (9) is tightly attached to the other end face of the first segmented stator (8) and one end face of the second segmented stator (12) through high-thermal-conductivity epoxy resin; the other half of the water-cooling structure of the axially symmetrical segmented inner stator is also connected in the same way; the water outlet pipes of the four cooling discs (6, 9, 16, 19) are welded with the main water outlet pipe (3), and the water inlet pipes of the two water inlet rings (5, 20) are welded with the main water inlet pipe (4).
The further technical scheme is as follows: the stator support frame (13) and the stator fastening discs (2 and 21) are made of aluminum alloy; eight supporting plates (1304) are arranged on the stator support frame (13) along the circumferential direction, a clamping groove (1303) is arranged on the surface of each petal supporting plate (1304), the clamping groove (1303) penetrates through the stator support frame (13) along the axial direction, a supporting column (1302) is arranged below the supporting plate (1304) of the stator support frame (13), eight screw holes (1301) are drilled in the supporting column (1302), and two rows of supporting ribs (1305) are arranged between the supporting plate (1304) and the supporting column (1302) to play a supporting and fixing role; eight bolt through holes (201, 2101) are drilled in the stator fastening discs (2, 21) along the circumferential direction, the stator fastening discs (2, 21) are connected with eight supporting columns (1302) through bolts (1, 22), and three segmented stators (8, 12, 17) and cushion block groups (10, 15) are fastened together; the stator fastening discs (2, 21) are additionally provided with eight ventilation holes (202, 2102) along the circumferential direction for ventilation and air exchange inside the stator support frame (13).
The further technical scheme is as follows: the water inlet ring I (5) and the water inlet ring II (20) are both made of copper pipes and are respectively provided with a water inlet pipe (501, 2001), and the two water inlet pipes (501, 2001) are arranged in parallel on a straight line along the axial direction; two rows of circular water outlets are formed in the first water inlet ring (5) and the second water inlet ring (20) along the circumferential direction, the number of each water outlet is equal to that of the stator grooves, the outer ring water outlets (502 and 2002) are welded with the water inlets of the outer cooling discs (6 and 19), and the inner ring water outlets (503 and 2003) are correspondingly welded with the cooling through pipes.
The further technical scheme is as follows: the cooling through pipes (7, 18) and the cooling semi-through pipes (11, 14) are made of copper pipes, the number of the cooling through pipes is the same as that of stator slots, the diameter of the cooling through pipes is half of the tooth width of a stator, the cooling through pipes (7, 18) are open at two ends, and the cooling semi-through pipes (11, 14) are open at one end and closed at the other end.
And, its further technical scheme is: the segmented stators (8, 12 and 17) are provided with through holes (801, 1201 and 1701), the number of the through holes (801, 1201 and 1701) is the same as the number of the slots, the diameter of the through holes (801, 1201 and 1701) is half of the tooth width of the stator, and the positions of the through holes (801, 1201 and 1701) are half of the distance between the tooth bottom of the stator and the inner ring of the stator; rectangular protrusions (802, 1202 and 1702) are arranged on the inner ring of the segmented stator (8, 12 and 17) and are used for being matched with a clamping groove (1303) of a stator support frame (13) to position the segmented stator (8, 12 and 17); the block stators (8, 12 and 17) are all formed by laminating silicon steel sheets with high magnetic conductivity and low loss.
And, its further technical scheme is: the outer cooling discs (6 and 19) and the inner cooling discs (9 and 16) are all made of copper pipes, radial radiation type cooling is carried out on stator teeth and yokes along the circumferential direction, the number of cooling branches (601 and 901), the number of water inlets (602 and 902) is the same as that of stator slots, the width of the water inlet pipes (603 and 903) and the water outlet pipes (604 and 904) of each branch (601 and 901) is half of the tooth body of the stator, the thickness of the water inlet pipes accounts for one twentieth of the total length of the three stators, and the water outlet pipes (604 and 904) of all the cooling branches (601 and 901) are connected through circular pipelines (605 and 905); one end of each circular pipeline (605, 905) is closed (607, 907), the other end of each circular pipeline leads out a water outlet pipe (606, 906), and the four water outlet pipes are arranged in parallel on a straight line along the axial direction.
And, its further technical scheme is: the main water inlet pipe (4) and the main water outlet pipe (3) both adopt copper pipes, and one end of each of the copper pipes is open and the other end of each of the copper pipes is closed; the total water outlet pipe (3) is provided with four holes along the axial direction and is respectively welded with the water outlet pipes of the four cooling discs (6, 9, 16 and 19); the main water inlet pipe (4) is provided with two holes along the axial direction and is respectively welded with the water inlet pipes of the two water inlet rings (5 and 20); the water outlet pipes of the four cooling discs (6, 9, 16 and 19) and the water inlet pipes of the two water inlet rings (5 and 20) are vertically arranged on the ground in a radial direction, and the total water outlet pipe is positioned above the total water inlet pipe; cooling water enters the two water inlet rings (5 and 20) through the main water inlet pipe (4), then enters the outer cooling discs (6 and 19) and enters the inner cooling discs (9 and 16) through the cooling through pipes, and after cooling the stator tooth parts and the yoke parts, the cooling water is collected in the main water outlet pipe (3) through the water outlet pipes of the four cooling discs (6, 9, 16 and 19) and flows out.
The invention has the beneficial effects.
The stator core and the stator winding adopt an axial sectional radial water cooling structure, the temperature rise of the stator core and the winding is low, the accelerated insulation aging of the stator core and the stator winding caused by overhigh temperature and even the burning out of the motor are avoided, and the outer rotor permanent magnet synchronous hub motor can work in a safe and efficient range, so that the failure rate of the motor is low, and the operation is reliable.
And (II) the stator core adopts an axial segmented structure, and the radial radiation-shaped cooling water pipes are arranged between every two blocks, so that a water path can fully contact the stator core and the stator winding, and the heat dissipation is increased. Meanwhile, the equivalent resistance between the stator cores is increased, the eddy current loss of the stator cores can be obviously reduced, and the heat generation is reduced.
And thirdly, the manufacturing and assembling process of the invention is simple, and the maintainability is high.
Drawings
Fig. 1 is an exploded view of the structure of the present invention.
Fig. 2 is an assembly view of the structure of the present invention.
Fig. 3 is an assembly view of a specific waterway structure of the present invention.
Fig. 4 is a detailed block diagram of the stator bracket of the present invention of fig. 1.
Fig. 5 is a detailed structural view of the fastening platen of the present invention in fig. 1.
Fig. 6 is a detailed structural view of the water inlet ring of the present invention in fig. 1.
Fig. 7 is a detailed structural view of the segmented stator of the present invention of fig. 1.
Fig. 8 is a detailed structural view of the outer and inner cooling plates of the present invention of fig. 1.
FIG. 9 is a schematic view showing the flow direction of the cooling water inside the outer cooling plate according to the present invention.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
As shown in fig. 1, a water-cooling structure of an axially segmented inner stator of an outer rotor hub motor includes: the stator comprises a first group of fastening bolts (1), a second group of fastening bolts (22) and a stator support frame (13); a first stator fastening pressure plate (2) and a second stator fastening pressure plate (21); a total water inlet pipe (4) and a total water outlet pipe (3); a first water inlet ring (5) and a second water inlet ring (20); a first outer cooling plate (6) and a second outer cooling plate (19); a first inner cooling plate (9) and a second inner cooling plate (16); a cushion block group I (10) and a cushion block group II (15); a first group of cooling through pipes (7) and a second group of cooling through pipes (18); a first group of cooling semi-through pipes (11) and a second group of cooling semi-through pipes (14); a first block stator (8), a second block stator (12) and a third block stator (17); the water inlet structure comprises a main water inlet pipe (4), a first group of fastening bolts (1), a first stator fastening pressure plate (2), a first water inlet ring (5), a first outer cooling plate (6), a first group of cooling through pipes (7), a first blocking stator (8), a first inner cooling plate (9), a first cushion block group (10), a first group of cooling half through pipes (11), a second blocking stator (12), a second group of cooling half through pipes (14), a second cushion block group (15), a second inner cooling plate (16), a third stator blocking block (17), a second group of cooling through pipes (18), a second outer cooling plate (19), a second water inlet ring (20), a second stator fastening pressure plate (21) and a second group of fastening bolts (22) which are arranged in sequence along the axial direction.
As shown in fig. 2 and 3, the stator support frame (13) is arranged at the inner ring of the stator, three stators (8, 12, 17) and four cooling discs (6, 9, 16, 19) are all sleeved on the stator support frame (13) and coaxial with the stator support frame, the inner rings of the three stators (8, 12, 17) and the four cooling discs (6, 9, 16, 19) are all tightly attached to the surface of the outer ring of the stator support frame (13) and position the three stators (8, 12, 17) through surface grooves of the stators, and the segmented stators (8, 12, 17) are fastened through stator fastening pressure plates (2, 21) and cushion block groups (10, 15). The water outlet hole of the outer ring of the water inlet ring I (5) is welded with the water inlet hole of the outer cooling disc I (6), the outer cooling disc I (6) is tightly attached to one end face of the block stator I (8) through high-heat-conductivity epoxy resin, and the water outlet hole of the inner ring of the water inlet ring I (5) is welded with one end of the first group of cooling through pipes (7); through holes are formed in yoke parts of the blocking stators (8, 12 and 17) along the circumferential direction, the diameters of the through holes are the same as the diameters of the through pipes (7, 11, 14 and 18), the first group of cooling through pipes (7) penetrate through the first stator blocking part (8), the other ends of the first group of cooling through pipes are welded with a circumferential water inlet of the first inner cooling disc (9), a circumferential water outlet of the first inner cooling disc (9) is welded with a water inlet end of the first group of cooling semi-through pipes (11), and the first group of cooling semi-through pipes (11) penetrate into the middle part through holes of the yoke parts of the second blocking stator (12); the outer ring of the first inner cooling disc (9) is provided with a first cushion block group (10), the thickness of the first cushion block group (10) is the same as that of the first inner cooling disc (9), and the first inner cooling disc (9) is tightly attached to the other end face of the first segmented stator (8) and one end face of the second segmented stator (12) through high-thermal-conductivity epoxy resin; the other half of the water-cooling structure of the axially symmetrical segmented inner stator is also connected in the same way; the water outlet pipes of the four cooling discs (6, 9, 16, 19) are welded with the main water outlet pipe (3), and the water inlet pipes of the two water inlet rings (5, 20) are welded with the main water inlet pipe (4).
As shown in fig. 4 and 5, the stator support frame (13) and the stator fastening discs (2, 21) are made of aluminum alloy; eight supporting plates (1304) are arranged on the stator support frame (13) along the circumferential direction, a clamping groove (1303) is arranged on the surface of each petal supporting plate (1304), the clamping groove (1303) penetrates through the stator support frame (13) along the axial direction, a supporting column (1302) is arranged below the supporting plate (1304) of the stator support frame (13), eight screw holes (1301) are drilled in the supporting column (1302), and two rows of supporting ribs (1305) are arranged between the supporting plate (1304) and the supporting column (1302) to play a supporting and fixing role; eight bolt through holes (201, 2101) are drilled in the stator fastening discs (2, 21) along the circumferential direction, the stator fastening discs (2, 21) are connected with eight supporting columns (1302) through bolts (1, 22), and three segmented stators (8, 12, 17) and cushion block groups (10, 15) are fastened together; the stator fastening discs (2, 21) are additionally provided with eight ventilation holes (202, 2102) along the circumferential direction for ventilation and air exchange inside the stator support frame (13).
As shown in fig. 6, the first water inlet ring (5) and the second water inlet ring (20) both adopt copper pipes, and each water inlet pipe (501, 2001) is provided, and the two water inlet pipes (501, 2001) are arranged in parallel on a straight line along the axial direction; two rows of circular water outlets are formed in the first water inlet ring (5) and the second water inlet ring (20) along the circumferential direction, the number of each water outlet is equal to that of the stator grooves, the outer ring water outlets (502 and 2002) are welded with the water inlets of the outer cooling discs (6 and 19), and the inner ring water outlets (503 and 2003) are correspondingly welded with the cooling through pipes.
As shown in fig. 7, the segmented stators (8, 12, 17) are all provided with through holes (801, 1201, 1701), the number of the through holes (801, 1201, 1701) is the same as the number of the slots, the diameter of the through holes (801, 1201, 1701) is half of the tooth width of the stator, and the positions of the through holes (801, 1201, 1701) are half of the distance between the tooth bottom of the stator and the inner ring of the stator; rectangular protrusions (802, 1202 and 1702) are arranged on the inner ring of the segmented stator (8, 12 and 17) and are used for being matched with a clamping groove (1303) of a stator support frame (13) to position the segmented stator (8, 12 and 17); the block stators (8, 12 and 17) are all formed by laminating silicon steel sheets with high magnetic conductivity and low loss.
As shown in fig. 8, the outer cooling disks (6, 19) and the inner cooling disks (9, 16) both adopt copper pipes, the stator teeth and the yokes are cooled in a radial radiation manner along the circumferential direction, the number of cooling branches (601, 901) is the same as that of stator slots, the pipe width of the water inlet pipes (603, 903) and the water outlet pipes (604, 904) of each branch (601, 901) is half of the stator tooth body, the thickness of the branch occupies one twentieth of the total length of the three stators, and the water outlet pipes (604, 904) of all the cooling branches (601, 901) are connected through circular pipes (605, 905); one end of each circular pipeline (605, 905) is closed (607, 907), the other end of each circular pipeline leads out a water outlet pipe (606, 906), and the four water outlet pipes are arranged in parallel on a straight line along the axial direction.
As shown in fig. 3, the total water inlet pipe (4) and the total water outlet pipe (3) both adopt copper pipes, and both are open at one end and closed at the other end; the total water outlet pipe (3) is provided with four holes along the axial direction and is respectively welded with the water outlet pipes of the four cooling discs (6, 9, 16 and 19); the main water inlet pipe (4) is provided with two holes along the axial direction and is respectively welded with the water inlet pipes of the two water inlet rings (5 and 20); the water outlet pipes of the four cooling discs (6, 9, 16 and 19) and the water inlet pipes of the two water inlet rings (5 and 20) are vertically arranged on the ground in a radial direction, and the total water outlet pipe is positioned above the total water inlet pipe; cooling water enters the two water inlet rings (5 and 20) through the main water inlet pipe (4), then enters the outer cooling discs (6 and 19) and enters the inner cooling discs (9 and 16) through the cooling through pipes, and after cooling the stator tooth parts and the yoke parts, the cooling water is collected in the main water outlet pipe (3) through the water outlet pipes of the four cooling discs (6, 9, 16 and 19) and flows out.
What has been described above is only a preferred embodiment of the present invention, and the present invention is not limited to the above examples. It is to be understood that other modifications and variations may be devised by those skilled in the art without departing from the spirit and scope of the present invention. Are considered to be within the scope of the present invention.
Claims (8)
1. A water-cooling structure of an axially segmented inner stator of an outer rotor hub motor, comprising: the stator comprises a first group of fastening bolts (1), a second group of fastening bolts (22) and a stator support frame (13); a first stator fastening pressure plate (2) and a second stator fastening pressure plate (21); a total water inlet pipe (4) and a total water outlet pipe (3); a first water inlet ring (5) and a second water inlet ring (20); a first outer cooling plate (6) and a second outer cooling plate (19); a first inner cooling plate (9) and a second inner cooling plate (16); a cushion block group I (10) and a cushion block group II (15); a first group of cooling through pipes (7) and a second group of cooling through pipes (18); a first group of cooling semi-through pipes (11) and a second group of cooling semi-through pipes (14); a first block stator (8), a second block stator (12) and a third block stator (17); the water inlet structure comprises a main water inlet pipe (4), a first group of fastening bolts (1), a first stator fastening pressure plate (2), a first water inlet ring (5), a first outer cooling plate (6), a first group of cooling through pipes (7), a first blocking stator (8), a first inner cooling plate (9), a first cushion block group (10), a first group of cooling half through pipes (11), a second blocking stator (12), a second group of cooling half through pipes (14), a second cushion block group (15), a second inner cooling plate (16), a third stator blocking block (17), a second group of cooling through pipes (18), a second outer cooling plate (19), a second water inlet ring (20), a second stator fastening pressure plate (21) and a second group of fastening bolts (22) which are arranged in sequence along the axial direction.
2. The water-cooling structure of the axially segmented inner stator of the in-wheel motor as claimed in claim 1, wherein: the stator strut (13) is arranged at the inner ring of the stator, three stators (8, 12 and 17) and four cooling discs (6, 9, 16 and 19) are all sleeved on the stator strut (13) and coaxial with the stator strut, the inner rings of the three stators (8, 12 and 17) and the four cooling discs (6, 9, 16 and 19) are all tightly attached to the surface of the outer ring of the stator strut (13) and position the three stators (8, 12 and 17) through surface grooves of the stators, and the segmented stators (8, 12 and 17) are fastened through stator fastening pressure plates (2 and 21) and cushion block groups (10 and 15); the water outlet hole of the outer ring of the water inlet ring I (5) is welded with the water inlet hole of the outer cooling disc I (6), the outer cooling disc I (6) is tightly attached to one end face of the block stator I (8) through high-heat-conductivity epoxy resin, and the water outlet hole of the inner ring of the water inlet ring I (5) is welded with one end of the first group of cooling through pipes (7); through holes are formed in yoke parts of the blocking stators (8, 12 and 17) along the circumferential direction, the diameters of the through holes are the same as the diameters of the through pipes (7, 11, 14 and 18), the first group of cooling through pipes (7) penetrate through the first stator blocking part (8), the other ends of the first group of cooling through pipes are welded with a circumferential water inlet of the first inner cooling disc (9), a circumferential water outlet of the first inner cooling disc (9) is welded with a water inlet end of the first group of cooling semi-through pipes (11), and the first group of cooling semi-through pipes (11) penetrate into the middle part through holes of the yoke parts of the second blocking stator (12); the outer ring of the first inner cooling disc (9) is provided with a first cushion block group (10), the thickness of the first cushion block group (10) is the same as that of the first inner cooling disc (9), and the first inner cooling disc (9) is tightly attached to the other end face of the first segmented stator (8) and one end face of the second segmented stator (12) through high-thermal-conductivity epoxy resin; the other half of the water-cooling structure of the axially symmetrical segmented inner stator is also connected in the same way; the water outlet pipes of the four cooling discs (6, 9, 16, 19) are welded with the main water outlet pipe (3), and the water inlet pipes of the two water inlet rings (5, 20) are welded with the main water inlet pipe (4).
3. The water-cooling structure of the axial segmented inner stator of the outer rotor hub motor is characterized in that the stator support frame (13) and the stator fastening discs (2 and 21) are made of aluminum alloy; eight supporting plates (1304) are arranged on the stator support frame (13) along the circumferential direction, a clamping groove (1303) is arranged on the surface of each petal supporting plate (1304), the clamping groove (1303) penetrates through the stator support frame (13) along the axial direction, a supporting column (1302) is arranged below the supporting plate (1304) of the stator support frame (13), eight screw holes (1301) are drilled in the supporting column (1302), and two rows of supporting ribs (1305) are arranged between the supporting plate (1304) and the supporting column (1302) to play a supporting and fixing role; eight bolt through holes (201, 2101) are drilled in the stator fastening discs (2, 21) along the circumferential direction, the stator fastening discs (2, 21) are connected with eight supporting columns (1302) through bolts (1, 22), and three segmented stators (8, 12, 17) and cushion block groups (10, 15) are fastened together; the stator fastening discs (2, 21) are additionally provided with eight ventilation holes (202, 2102) along the circumferential direction for ventilation and air exchange inside the stator support frame (13).
4. The water-cooling structure of the axial segmented inner stator of the outer rotor hub motor is characterized in that the water inlet ring I (5) and the water inlet ring II (20) both adopt copper pipes and are respectively provided with a water inlet pipe (501, 2001), and the two water inlet pipes (501, 2001) are arranged in parallel on a straight line along the axial direction; two rows of circular water outlets are formed in the first water inlet ring (5) and the second water inlet ring (20) along the circumferential direction, the number of each water outlet is equal to that of the stator grooves, the outer ring water outlets (502 and 2002) are welded with the water inlets of the outer cooling discs (6 and 19), and the inner ring water outlets (503 and 2003) are correspondingly welded with the cooling through pipes.
5. According to claim 1, the water-cooling structure of the axial segmented inner stator of the outer rotor hub motor is characterized in that the cooling through pipes (7, 18) and the cooling semi-through pipes (11, 14) are all made of copper pipes, the number of the cooling through pipes is equal to that of stator slots, the diameter of the cooling through pipes is half of the tooth width of a stator, the cooling through pipes (7, 18) are open at two ends, and the cooling semi-through pipes (11, 14) are open at one end and closed at the other end.
6. The water-cooling structure of the axial segmented inner stator of the outer rotor hub motor is characterized in that the segmented stators (8, 12 and 17) are provided with through holes (801, 1201 and 1701), the number of the through holes (801, 1201 and 1701) is the same as the number of the grooves, the diameter of the through holes (801, 1201 and 1701) is half of the tooth width of the stator, and the positions of the through holes (801, 1201 and 1701) are half of the distance between the tooth bottom of the stator and the inner ring of the stator; rectangular protrusions (802, 1202 and 1702) are arranged on the inner ring of the segmented stator (8, 12 and 17) and are used for being matched with a clamping groove (1303) of a stator support frame (13) to position the segmented stator (8, 12 and 17); the block stators (8, 12 and 17) are all formed by laminating silicon steel sheets with high magnetic conductivity and low loss.
7. The water-cooling structure of the axial segmented inner stator of the outer rotor hub motor is characterized in that the outer cooling discs (6, 19) and the inner cooling discs (9, 16) both adopt copper pipes to carry out radial radiation type cooling on stator teeth and yokes along the circumferential direction, the number of cooling branches (601, 901) is the same as that of stator slots, the pipe width of a water inlet pipe (603, 903) and a water outlet pipe (604, 904) of each branch (601, 901) is half of the tooth body of the stator, the thickness of the water inlet pipe is one twentieth of the total length of the three stators, and the water outlet pipes (604, 904) of all the cooling branches (601, 901) are connected through circular pipes (605, 905); one end of each circular pipeline (605, 905) is closed (607, 907), the other end of each circular pipeline leads out a water outlet pipe (606, 906), and the four water outlet pipes are arranged in parallel on a straight line along the axial direction.
8. The water-cooling structure of the axial segmented inner stator of the outer rotor hub motor is characterized in that a main water inlet pipe (4) and a main water outlet pipe (3) both adopt copper pipes, and one end of each of the copper pipes is open and the other end of each of the copper pipes is closed; the total water outlet pipe (3) is provided with four holes along the axial direction and is respectively welded with the water outlet pipes of the four cooling discs (6, 9, 16 and 19); the main water inlet pipe (4) is provided with two holes along the axial direction and is respectively welded with the water inlet pipes of the two water inlet rings (5 and 20); the water outlet pipes of the four cooling discs (6, 9, 16 and 19) and the water inlet pipes of the two water inlet rings (5 and 20) are vertically arranged on the ground in a radial direction, and the total water outlet pipe is positioned above the total water inlet pipe; cooling water enters the two water inlet rings (5 and 20) through the main water inlet pipe (4), then enters the outer cooling discs (6 and 19) and enters the inner cooling discs (9 and 16) through the cooling through pipes, and after cooling the stator tooth parts and the yoke parts, the cooling water is collected in the main water outlet pipe (3) through the water outlet pipes of the four cooling discs (6, 9, 16 and 19) and flows out.
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| CN202110337327.8A CN113014040A (en) | 2021-03-30 | 2021-03-30 | Water-cooling structure of axial segmented inner stator of outer rotor hub motor |
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| CN202110337327.8A CN113014040A (en) | 2021-03-30 | 2021-03-30 | Water-cooling structure of axial segmented inner stator of outer rotor hub motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114977648A (en) * | 2022-07-29 | 2022-08-30 | 沈阳憬昱能源科技有限公司 | Free energy generator |
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Application publication date: 20210622 |