CN112104171B - Method for manufacturing stator of oil-cooled motor - Google Patents
Method for manufacturing stator of oil-cooled motor Download PDFInfo
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- CN112104171B CN112104171B CN202010890785.XA CN202010890785A CN112104171B CN 112104171 B CN112104171 B CN 112104171B CN 202010890785 A CN202010890785 A CN 202010890785A CN 112104171 B CN112104171 B CN 112104171B
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- stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- 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
Abstract
The invention discloses a method for manufacturing a stator of an oil-cooled motor. It includes stator core, spray ring and casing, and stator core includes that first stator is folded towards piece, second stator towards piece and third stator towards the piece and is folded and press and form, and stator core, spray ring and casing installation back constitute cooling channel, the inlet port and the cooling channel intercommunication at casing top, and spray ring spun cooling oil flows from the oil outlet of chassis bottom. The invention has simple structure and reasonable design, the cooling oil directly contacts with the end part of the stator winding and the surface of the stator to take away heat, thereby achieving good cooling effect, the diameter of the inner circle of the shell is consistent after the shell is not provided with a cooling flow passage, the manufacture is easy, and the invention can meet the design and manufacture of various types and specifications by changing the length of the stator, thereby improving the generalization degree of the shell, and achieving the purposes of reducing the manufacture difficulty, short production period and low cost.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a method for manufacturing a stator of an oil-cooled motor.
Background
In recent years, in most motor applications, a demand for weight reduction of motors has been made. The motor is required to output a larger torque and a higher power in a smaller volume. The liquid cooling mode is a cooling mode which is relatively simple, high in safety and cooling efficiency and meets higher requirements for heat dissipation of the motor to guarantee safety, reliability, light weight and the like of the motor. Based on the requirements, the liquid cooling motor in the current market adopts a metal casing comprising a cooling flow channel, a motor stator is cooled by water-based cooling liquid in the cooling flow channel, and a cooling medium is not contacted with the stator; and secondly, cooling oil is adopted by the motor to flow through the outer surface of the motor iron core and is sprayed to the winding to carry out contact type heat conduction cooling. However, in the above applications, the motor core and the winding are cooled by the cooling flow channel and the oil spraying device which are arranged on the casing, but since the cooling flow channel and the oil spraying device are arranged on the casing, the difficulty is increased for manufacturing and processing the motor casing, and the motor of each model needs different flow channels, which inevitably affects the generalization of the motor casing, increases the number of the molds and the casing, is not beneficial to the mass production of the motor, reduces the manufacturing efficiency of the motor, increases the difficulty, and further affects the economic benefit.
Disclosure of Invention
The invention aims to provide an oil-cooled motor which is convenient for manufacturing a shell.
The object of the invention is thus achieved.
The manufacturing method of the stator of the oil-cooled motor is characterized by comprising a stator core, a spraying ring and a shell, wherein the stator core is punched: the stator core comprises a first stator punching sheet, a second stator punching sheet and a third stator punching sheet, wherein a rotor mounting groove, a plurality of winding mounting grooves and a rivet hole are punched on the first stator punching sheet, the second stator punching sheet and the third stator punching sheet, even first grooves are punched on the periphery of the first stator punching sheet at equal intervals, even first bosses are formed between the first grooves, the diameter of the periphery of the second stator punching sheet is the same as the diameter of the periphery of the first stator punching sheet, even second grooves are punched on the periphery of the second stator punching sheet at equal intervals, even second bosses are formed between the second grooves, the width of each second groove is the sum of the width of the two first grooves and the width of one first boss, the width of each second boss is the same as the width of the first boss, the diameter of the periphery of the third stator punching sheet is smaller than the diameter of the periphery of the first stator punching sheet, and a third groove is punched on the periphery of the third stator punching sheet, the width of the third groove is the same as that of the first groove, and the stator core is laminated: the first stator punching sheets are laminated into a group, the second stator punching sheets are laminated into two groups, the third stator punching sheets are laminated into two groups, a group of second stator punching sheets and a group of third stator punching sheets are respectively arranged on two sides of one group of stator punching sheets, wherein the second bosses of one group of second stator punching sheets are aligned with the first bosses of one group of stator punching sheets, the second bosses of the other group of second stator punching sheets are aligned with the first bosses of one group of stator punching sheets, the first bosses of the second bosses of the two groups of second stator punching sheets are aligned with each other, the third grooves of the two groups of third stator punching sheets are aligned with one first groove of one group of second stator punching sheets, a rivet penetrates through a rivet hole to form a stator core, an annular flow passage is arranged on the periphery of the spray ring, an oil injection hole and a spigot are arranged on the inner side wall of the spray ring, an oil inlet notch is arranged on one side of the spray ring, the oil inlet notch is aligned with the third groove, the oil inlet notch and the oil injection hole are communicated with the annular flow channel, the top of the machine shell is provided with an oil inlet, the bottom of the machine shell is provided with an oil outlet, the stator core and the spray ring are integrally arranged in the machine shell, the oil inlet is aligned with and communicated with the first groove, and the inner side wall of the machine shell, the first groove, the second groove, the third groove and the annular flow channel form a cooling flow channel.
The technical scheme can be further perfected as follows.
The stator core is laminated and molded through a laminating tool, the laminating tool comprises a base and a pressing plate, a mandrel and a positioning boss are arranged on the base, the width of the positioning boss is the same as that of the first groove, a abdicating hole is arranged on the base corresponding to the rivet hole, a through hole is arranged on the pressing plate corresponding to the mandrel,
laminating the stator core: the method comprises the following steps: a group of third stator punching sheets are laminated on the mandrel, and third grooves of the third stator punching sheets are aligned with the positioning bosses;
step two: a group of second stator punching sheets are laminated on the mandrel, and the groove edge of a second groove of each second stator punching sheet is aligned with the groove edge of a third groove of the third stator punching sheet in the step one;
step three: a group of first stator punching sheets are laminated on the mandrel, and a first boss of each first stator punching sheet is aligned with a second boss of the second stator punching sheet in the step two; step four: the other group of second stator punching sheets are laminated on the mandrel, a second boss of each second stator punching sheet is aligned with a first boss of the first stator punching sheet in the step three, and the second boss of each second stator punching sheet and the second boss of the second stator punching sheet in the step two are staggered by a first boss position; step five: the other group of third stator punching sheets are laminated on the mandrel, and third grooves of the third stator punching sheets are aligned with the positioning bosses;
step six: and D, the rivet penetrates downwards from the rivet hole of the third stator punching sheet in the step V until the rivet enters the abdicating hole, the pressing plate is sleeved on the mandrel, the bottom surface of the pressing plate abuts against the rivet and the third stator punching sheet in the step V, the pressing plate is pressed downwards through the press machine to enable the stator core to be compressed, and the rivet is riveted to enable the stator core to be fixedly molded.
More specifically, the laminated height L3 of the group of third stator punching sheets in the first step and the fifth step is less than 3 mm.
More specifically, the laminated height L2 of the second stator lamination in the second step and the fourth step is 105% of the width value of the first groove and is an integer.
More specifically, the length of the rivet in the sixth step is 3-5mm greater than the length of the stator core.
More specifically, the laminating height L3 of the third stator punching is equal to the depth of a seam allowance of the spray ring, and the seam allowance is in transition fit with the outer periphery of the third stator punching.
More specifically scheme, a plurality of the nozzle opening is the annular and arranges, and the equidistance interval sets up between the nozzle opening.
The cooling oil enters the cooling flow channel through the oil inlet hole on the casing and flows through the periphery of the stator core, and is sprayed out to the end part of the stator winding through the spraying hole on the spraying ring and then discharged through the oil outlet hole on the casing; the cooling oil directly contacts with the end part of the stator winding and the surface of the stator to take away heat, and a good cooling effect is achieved. The diameters of the inner circles of the casing are consistent after the cooling flow channel is not arranged on the casing, so that the casing is easy to manufacture, and the design and manufacture of various types and specifications can be met by changing the length of the stator, thereby improving the generalization degree of the casing, and achieving the purposes of reducing the manufacturing difficulty, shortening the production period and reducing the cost.
Drawings
Fig. 1 is an exploded structural schematic diagram of a stator core and a laminating tool.
Fig. 2 is a schematic sectional view of a stator core and a lamination tool.
Fig. 3 is a schematic view of a stator core structure.
Fig. 4 is a schematic structural diagram of the first stator lamination.
Fig. 5 is a schematic structural diagram of the second stator lamination.
Fig. 6 is a schematic structural diagram of a third stator punching sheet.
Fig. 7 is a schematic structural view of the spray ring.
Fig. 8 is a schematic structural view of the stator core, the stator winding and the spray ring after installation.
FIG. 9 is a schematic view of a rivet structure.
Fig. 10 is a schematic structural diagram of the chassis.
Fig. 11 is a schematic sectional view of the assembled stator core, spray ring and housing.
Detailed Description
The invention is further described with reference to the following figures and examples:
first embodiment, referring to fig. 1 to 11, a method for manufacturing a stator of an oil-cooled motor includes a stator core 1, a spray ring 2, and a casing 3.
Punching of stator core 1: the stator core 1 comprises a first stator punching 4, a second stator punching 5 and a third stator punching 6, wherein a rotor mounting groove 11, a plurality of winding mounting grooves 12 and a rivet hole 13 are punched on the first stator punching 4, the second stator punching 5 and the third stator punching 6, an even number of first grooves 41 are punched on the periphery of the first stator punching 4 at equal intervals, an even number of first bosses 42 are formed between the first grooves 41, the diameter of the periphery of the second stator punching 5 is the same as that of the periphery of the first stator punching 4, an even number of second grooves 51 are punched on the periphery of the second stator punching 5 at equal intervals, an even number of second bosses 52 are formed between the second grooves 51, the width of each second groove 51 is the sum of the width of two first grooves 41 and the width of one first boss 42, the width of each second boss 52 is the same as that of the first boss 42, and the diameter of the periphery of the third stator punching 6 is smaller than that of the periphery of the first stator punching 4, a third groove 61 is punched on the outer periphery of the third stator punching sheet 6, and the width of the third groove 61 is the same as that of the first groove 41.
Laminating step of the stator core 1: the first stator punching sheets 4 are laminated into a group, the second stator punching sheets 5 are laminated into two groups, the third stator punching sheets 6 are laminated into two groups, a group of second stator punching sheets 5 and a group of third stator punching sheets 6 are respectively arranged at two sides of a group of stator punching sheets,
the method comprises the following steps: a group of third stator laminations 6 are laminated on the mandrel 73, the third grooves 61 of the third stator laminations 6 are aligned with the positioning bosses 74, and the laminated height L3 of the group of third stator laminations 6 is less than 3 mm;
step two: a group of second stator laminations 5 are laminated on the mandrel 73, the groove edge of the second groove 51 of the second stator lamination 5 is aligned with the groove edge of the third groove 61 of the third stator lamination 6 in the first step, and the laminated height L2 of the group of second stator laminations 5 is 105% of the width value of the first groove 41 and is an integer (i.e. L2 is greater than the width of the first groove 41);
step three: a group of first stator laminations 4 is overlapped on the mandrel 73, and a first boss 42 of the first stator laminations 4 is aligned with a second boss 52 of the second stator laminations 5 in the second step;
step four: the other group of second stator laminations 5 are laminated on the mandrel 73, the second boss 52 of the second stator lamination 5 is aligned with the first boss 42 of the first stator lamination 4 in the third step, and the second boss 52 of the second stator lamination 5 in the second step are staggered by one first boss 42;
step five: the other group of third stator laminations 6 are laminated on the mandrel 73, the third grooves 61 of the third stator laminations 6 are aligned with the positioning bosses 74, and the laminated height L3 of the group of third stator laminations 6 is less than 3 mm;
step six: selecting a rivet 8, wherein the length of the rivet 8 is larger than the whole length of the stator core 1 by 3-5mm, the thickness of the head of the rivet 8 is 2 mm, the diameter of the head of the rivet 8 is larger than the diameter of the rod of the rivet 2 mm, the rivet 8 penetrates downwards from the rivet hole 13 of the third stator punching sheet 6 in the fifth step until the rivet 8 enters the abdicating hole 75, the pressing plate 72 is sleeved on the mandrel 73, the bottom surface of the pressing plate 72 is abutted against the rivet 8 and the third stator punching sheet 6 in the fifth step, the pressing plate 72 is pressed down by a press machine to compress the stator core 1, and the rivet 8 is riveted to fix and form the stator core 1.
The periphery of spray ring 2 is equipped with annular runner 21, a plurality of nozzle opening 22 and tang 23 that are equipped with on the 2 inside walls of spray ring, and is a plurality of nozzle opening 22 is the annular and arranges, and the equidistance interval sets up between the nozzle opening 22, and the degree of depth of tang 23 equals with third stator punching 6 fold and press height L3, and spray ring 2 one side is equipped with oil feed breach 24, and oil feed breach 24 aligns with third recess 61, and oil feed breach 24 and nozzle opening 22 all communicate with annular runner 21. The spray ring 2 is sleeved on the periphery of a group of third stator punching sheets 6 through a spigot 23, wherein the spray ring 2 is made of metal, and the spray ring 2 is installed on the stator core 1 in a hot sleeve mode.
The top of the machine shell 3 is provided with an oil inlet hole 31, the bottom of the machine shell 3 is provided with an oil outlet hole 32, the stator core 1 and the spray ring 2 are integrally arranged in the machine shell 3, the oil inlet hole 31 is aligned with and communicated with the first groove 41, and the inner side wall of the machine shell 3, the first groove 41, the second groove 51, the third groove 61 and the annular flow channel 21 form a cooling flow channel 10.
During assembly, the stator winding 9 is fixed in the winding installation groove 12 of the stator core 1, finally, the stator core 1 is integrally installed in the machine shell 3, and the inner side wall of the machine shell 3 seals the annular flow channel 21, the first groove 41, the second groove 51 and the third groove 61 of the spray ring 2. Cooling oil flows into the cooling flow channel 10 from the oil inlet hole 31 of the casing 3, the cooling oil in the cooling flow channel 10 flows downwards in two paths, and returns back and forth in the axial direction of the stator core 1, namely, the cooling oil in the cooling flow channel 10 flows into the annular flow channel 21 of the spray ring 2 through the oil outlet gap and the oil inlet gap 24 in the flowing process, the cooling oil is sprayed out of the oil spray hole 22 to the end part of the stator winding 9, and finally the cooling oil is collected at the bottom of the casing 3 and is discharged from the oil outlet hole 32.
The cooling oil directly contacts with the end of the stator winding 9 and the surface of the stator core 1, so that the heat conduction link is reduced, the heat dissipation effect of the motor is good, meanwhile, the cooling flow channel 10 is not arranged on the casing 3, the diameter of the inner circle of the casing 3 is consistent, various modes such as stretching, casting and spinning can be adopted for manufacturing, the manufacturing is easy, the length of the different stator cores 1 can meet the design and manufacturing of various types and specifications, and the purpose of the generalization degree of the casing 3 is improved.
Claims (7)
1. A method for manufacturing a stator of an oil-cooled motor is characterized by comprising a stator iron core, a spray ring and a shell,
punching of the stator core: the stator core comprises a first stator punching sheet, a second stator punching sheet and a third stator punching sheet, wherein a rotor mounting groove, a plurality of winding mounting grooves and a rivet hole are punched on the first stator punching sheet, the second stator punching sheet and the third stator punching sheet, even first grooves are punched on the periphery of the first stator punching sheet at equal intervals, even first bosses are formed between the first grooves, the diameter of the periphery of the second stator punching sheet is the same as the diameter of the periphery of the first stator punching sheet, even second grooves are punched on the periphery of the second stator punching sheet at equal intervals, even second bosses are formed between the second grooves, the width of each second groove is the sum of the width of the two first grooves and the width of one first boss, the width of each second boss is the same as the width of the first boss, the diameter of the periphery of the third stator punching sheet is smaller than the diameter of the periphery of the first stator punching sheet, and a third groove is punched on the periphery of the third stator punching sheet, the width of the third groove is the same as the width of the first groove,
laminating of the stator core: the first stator punching sheets are laminated into a group, the second stator punching sheets are laminated into two groups, the third stator punching sheets are laminated into two groups, a group of second stator punching sheets and a group of third stator punching sheets are respectively arranged on two sides of one group of stator punching sheets, wherein the second bosses of one group of second stator punching sheets are aligned with the first bosses of one group of stator punching sheets, the second bosses of the other group of second stator punching sheets are aligned with the first bosses of one group of stator punching sheets, the first bosses of the two groups of second stator punching sheets which are aligned with the second bosses of the two groups of second stator punching sheets are staggered, the third grooves of the two groups of third stator punching sheets are aligned with one first groove of one group of second stator punching sheets, and a rivet penetrates through a rivet hole to form a stator core,
the spray ring periphery is equipped with annular flow passage, is equipped with nozzle opening and tang on the spray ring internal wall, and the spray ring passes through the tang cover on the periphery of a set of third stator towards the piece, and spray ring one side is equipped with the oil feed breach, and the oil feed breach aligns with the third recess, and oil feed breach and nozzle opening all communicate with annular flow passage, the casing top is equipped with the inlet port, and the chassis bottom is equipped with the oil outlet, and stator core and spray ring are whole to be set up in the casing, and the inlet port aligns and communicates first recess, the inside wall and the first recess of casing, second recess, third recess, annular flow passage constitute cooling flow passage.
2. The method for manufacturing the stator of the oil-cooled motor according to claim 1, wherein the stator core is formed by laminating through a laminating tool, the laminating tool comprises a base and a pressing plate, the base is provided with a core shaft and a positioning boss, the width of the positioning boss is the same as that of the first groove, the base is provided with a abdicating hole corresponding to the rivet hole, the pressing plate is provided with a through hole corresponding to the core shaft, and the laminating process of the stator core is as follows: the method comprises the following steps: a group of third stator punching sheets are laminated on the mandrel, and third grooves of the third stator punching sheets are aligned with the positioning bosses;
step two: a group of second stator punching sheets are laminated on the mandrel, and the groove edge of a second groove of each second stator punching sheet is aligned with the groove edge of a third groove of the third stator punching sheet in the step one;
step three: a group of first stator punching sheets are laminated on the mandrel, and a first boss of each first stator punching sheet is aligned with a second boss of the second stator punching sheet in the step two; step four: the other group of second stator punching sheets are laminated on the mandrel, a second boss of each second stator punching sheet is aligned with a first boss of the first stator punching sheet in the step three, and the second boss of each second stator punching sheet and the second boss of the second stator punching sheet in the step two are staggered by a first boss position; step five: the other group of third stator punching sheets are laminated on the mandrel, and third grooves of the third stator punching sheets are aligned with the positioning bosses;
step six: and D, the rivet penetrates downwards from the rivet hole of the third stator punching sheet in the step V until the rivet enters the abdicating hole, the pressing plate is sleeved on the mandrel, the bottom surface of the pressing plate abuts against the rivet and the third stator punching sheet in the step V, the pressing plate is pressed downwards through the press machine to enable the stator core to be compressed, and the rivet is riveted to enable the stator core to be fixedly molded.
3. The manufacturing method of the stator of the oil-cooled motor as claimed in claim 2, wherein the laminated height L3 of the group of third stator laminations in the first step and the fifth step is less than 3 mm.
4. The method for manufacturing the stator of the oil-cooled motor according to claim 2, wherein the laminated height L2 of the second stator lamination in the second step and the fourth step is 105% of the width value of the first groove and is an integer.
5. The method for manufacturing a stator of an oil-cooled motor according to claim 2, wherein the length of the rivet in the sixth step is 3-5mm greater than the length of the stator core.
6. The manufacturing method of the stator of the oil-cooled motor as claimed in claim 1, wherein the laminated height L3 of the third stator lamination is equal to the depth of the spigot of the spray ring, and the spigot is in transition fit with the outer periphery of the third stator lamination.
7. The method of claim 1, wherein the plurality of oil injection holes are arranged in a ring shape, and the oil injection holes are spaced apart from each other at equal intervals.
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| CN202010890785.XA CN112104171B (en) | 2020-08-29 | 2020-08-29 | Method for manufacturing stator of oil-cooled motor |
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| CN202010890785.XA CN112104171B (en) | 2020-08-29 | 2020-08-29 | Method for manufacturing stator of oil-cooled motor |
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| CN112104171B true CN112104171B (en) | 2022-01-14 |
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| CN113364166B (en) * | 2021-06-25 | 2024-02-06 | 合肥巨一动力系统有限公司 | Motor stator oil cooling structure |
| CN113612351A (en) * | 2021-06-29 | 2021-11-05 | 臻驱科技（上海）有限公司 | Cooling structure and method of driving motor, oil-cooled motor and automobile |
| CN113824224A (en) * | 2021-10-20 | 2021-12-21 | 广州小鹏汽车科技有限公司 | Stator core and motor |
| DE102022101923A1 (en) * | 2022-01-27 | 2023-07-27 | Schaeffler Technologies AG & Co. KG | stator |
| CN114520570B (en) * | 2022-02-22 | 2023-12-19 | 浙江吉利控股集团有限公司 | Manufacturing method of stator framework |
| CN115037070A (en) * | 2022-05-10 | 2022-09-09 | 小米汽车科技有限公司 | Motor stator and oil-cooled motor |
| CN115333265A (en) * | 2022-07-20 | 2022-11-11 | 华为数字能源技术有限公司 | Stator, motor, power assembly and mechanical equipment |
| CN116111753A (en) * | 2023-04-13 | 2023-05-12 | 博格华纳汽车零部件（武汉）有限公司 | Driving motor stator oil cooling structure and oil cooling method thereof |
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