CN112104172B - Method for manufacturing stator of closed oil-cooled motor - Google Patents
Method for manufacturing stator of closed oil-cooled motor Download PDFInfo
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- CN112104172B CN112104172B CN202010890796.8A CN202010890796A CN112104172B CN 112104172 B CN112104172 B CN 112104172B CN 202010890796 A CN202010890796 A CN 202010890796A CN 112104172 B CN112104172 B CN 112104172B
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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
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- 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 and spray ring constitute the cooling runner after the installation, the inlet port and the cooling runner intercommunication at casing top, spray ring spun cooling oil from the oil outlet outflow 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 a closed 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 holes are punched on the periphery of the first stator punching sheet at equal intervals, even first rib parts are formed between the first holes, 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 holes are punched on the periphery of the second stator punching sheet at equal intervals, even second rib parts are formed between the second holes, the width of each second hole is the sum of the width of the two first holes and the width of one first rib part, the width of each second rib part is the same as the width of the first rib part, 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 hole is punched on the periphery of the third stator punching sheet, the width of the third hole is the same as that of the first hole, and the lamination of the stator core is as follows: 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 rib parts of one group of second stator punching sheets are aligned with the first rib parts of one group of stator punching sheets, the second rib parts of the other group of second stator punching sheets are aligned with the first rib parts of one group of stator punching sheets, the first rib parts of the two groups of second stator punching sheets which are aligned with the second rib parts of the two groups of second stator punching sheets are staggered, the third holes of the two groups of third stator punching sheets are aligned with one first hole of one group of second stator punching sheets, a stator core is formed by a rivet penetrating through the holes, an annular flow passage is arranged in the spray ring, an oil injection hole and a rivet port are arranged on the inner side wall of the spray ring, the spray ring is sleeved on the periphery of one group of third stator punching sheets through the rivet port, an oil inlet notch is arranged on one side of the spray ring, the oil inlet notch is aligned with the third hole, the oil inlet notch and the oil injection hole are communicated with the annular flow channel, an oil inlet hole is formed in the top of the machine shell, an oil outlet hole is formed in the bottom of the machine shell, the stator core and the spraying ring are integrally arranged in the machine shell, the oil inlet hole is aligned and communicated with the first hole, and the first hole, the second hole, the third hole 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 hole, 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 stacked on the mandrel, and a third hole of each third stator punching sheet is aligned with the positioning boss;
step two: a group of second stator punching sheets are stacked on the mandrel, and the hole edge of a second hole of each second stator punching sheet is aligned with the hole edge of a third hole of a third stator punching sheet in the step I;
step three: a group of first stator punching sheets are laminated on the mandrel, and first rib portions of the first stator punching sheets are aligned with second rib portions of the second stator punching sheets in the second step; step four: the other group of second stator punching sheets are laminated on the mandrel, a second rib part of each second stator punching sheet is aligned with a first rib part of the first stator punching sheet in the third step, and the second rib part of each second stator punching sheet in the second step are staggered by one first rib part; step five: the other group of third stator punching sheets are stacked on the mandrel, and a third hole of each third stator punching sheet is aligned with the positioning boss;
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 hole 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.
More specifically, the first hole, the second hole and the third hole are arc-shaped long-strip-shaped holes.
The cooling oil enters the cooling flow channel through the oil inlet hole on the shell 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 shell; 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 (partially in section) of a shower ring.
Fig. 8 is a schematic structural view of the stator core and the stator winding after being mounted.
Fig. 9 is a schematic structural view of the stator core, the stator winding and the shower ring after installation.
FIG. 10 is a schematic view of the rivet structure.
Fig. 11 is a schematic structural diagram of the chassis.
Fig. 12 is a schematic sectional view of the assembled stator core, spray ring and casing.
Detailed Description
The invention is further described with reference to the following figures and examples:
first embodiment, referring to fig. 1 to 12, 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 sheet 4, a second stator punching sheet 5 and a third stator punching sheet 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 sheet 4, the second stator punching sheet 5 and the third stator punching sheet 6. An even number of first holes 41 are equidistantly punched in the outer periphery of the first stator punching sheet 4, an even number of first rib portions 42 are formed between the first holes 41, the outer periphery diameter of the second stator punching sheet 5 is the same as that of the first stator punching sheet 4, an even number of second holes 51 are equidistantly punched in the outer periphery of the second stator punching sheet 5, an even number of second rib portions 52 are formed between the second holes 51, the width W3 of each second hole 51 is the sum of the width W1 of the two first holes 41 and the width W2 of one first rib portion 42, the width W4 of each second rib portion 52 is the same as that of the first rib portion 42, the outer periphery diameter of the third stator punching sheet 6 is smaller than that of the first stator punching sheet 4, a third hole 61 is punched in the outer periphery of the third stator punching sheet 6, and the width W5 of the third hole 61 is the same as that of the first hole 41. Referring to fig. 4-6, the first hole, the second hole and the third hole are all arc-shaped and long-strip-shaped holes.
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 punching sheets 6 are laminated on the mandrel 73, the third holes 61 of the third stator punching sheets 6 are aligned with the positioning bosses 74, and the laminating height L3 of the group of third stator punching sheets 6 is less than 3 mm;
step two: a group of second stator laminations 5 are laminated on the mandrel 73, the hole edge of the second hole 51 of the second stator lamination 5 is aligned with the hole edge of the third hole 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 hole 41 and is an integer (i.e., L2 is greater than the width of the first hole 41);
step three: a group of first stator laminations 4 is overlapped on the mandrel 73, and the first rib parts 42 of the first stator laminations 4 are aligned with the second rib parts 52 of the second stator laminations 5 in the second step;
step four: the other group of second stator punching sheets 5 are laminated on the mandrel 73, the second rib parts 52 of the second stator punching sheets 5 are aligned with the first rib parts 42 of the first stator punching sheets 4 in the third step, and the second rib parts 52 of the second stator punching sheets 5 in the second step are staggered by one first rib part 42;
step five: the other group of third stator punching sheets 6 are overlapped on the mandrel 73, the third holes 61 of the third stator punching sheets 6 are aligned with the positioning bosses 74, and the overlapping height L3 of the group of third stator punching sheets 6 is smaller 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.
Then, a communicating hole 14 is formed on the top of the outer periphery of the stator core 1 through a milling cutter, the communicating hole 14 is located in the middle of the first hole 41 of the first stator punching sheet 4, and the diameter of the communicating hole 14 is not smaller than the width of the first hole 41.
Be equipped with annular runner 21 in the spray ring 2, a plurality of nozzle opening 22 and tang 23 that are equipped with on the 2 inside walls of spray ring, it 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 hole 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 the communication hole 14 of the stator core 1, the first hole 41 is communicated with the oil inlet hole 31 through the communication hole 14, and the first hole 41, the second hole 51, the third hole 61 and the annular flow channel 21 form the cooling flow channel 10.
During assembly, the stator winding 9 is fixed in the winding mounting groove 12 of the stator core 1, and finally the stator core 1 is integrally mounted in the housing 3. 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 (8)
1. A method for manufacturing a stator of a closed oil-cooled motor is characterized by comprising a stator 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 holes are punched on the periphery of the first stator punching sheet at equal intervals, even first rib parts are formed between the first holes, 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 holes are punched on the periphery of the second stator punching sheet at equal intervals, even second rib parts are formed between the second holes, the width of each second hole is the sum of the width of the two first holes and the width of one first rib part, the width of each second rib part is the same as the width of the first rib part, the diameter of the periphery of the third stator punching sheet is smaller than the diameter of the periphery of the first stator, and a third hole is punched on the periphery of the third stator punching sheet, the width of the third aperture is the same as the width of the first aperture,
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 rib parts of one group of second stator punching sheets are aligned with the first rib parts of one group of stator punching sheets, the second rib parts of the other group of second stator punching sheets are aligned with the first rib parts of one group of stator punching sheets, the first rib parts of the two groups of second stator punching sheets, which are aligned with the second rib parts, are staggered, the third holes of the two groups of third stator punching sheets are aligned with one first hole of one group of second stator punching sheets, and a rivet penetrates through the rivet hole to form the stator core,
the spray ring is internally provided with an annular flow passage, the inner side wall of the spray ring is provided with an oil injection hole and a spigot, the spray ring is sleeved on the periphery of a group of third stator punching sheets through the spigot, one side of the spray ring is provided with an oil inlet notch, the oil inlet notch is aligned with the third hole, the oil inlet notch and the oil injection hole are communicated with the annular flow passage, the top of the casing is provided with an oil inlet hole, the bottom of the casing is provided with an oil outlet hole, the stator core and the spray ring are integrally arranged in the casing, the oil inlet hole is aligned with and communicated with the first hole, and the first hole, the second hole, the third hole and the spray ring form a cooling flow passage.
2. The method for manufacturing the stator of the enclosed oil-cooled motor according to claim 1, wherein the stator core is formed by laminating through a laminating tool, the laminating tool includes 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 the width of the first hole, the base is provided with a step-down 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: the method comprises the following steps: a group of third stator punching sheets are stacked on the mandrel, and a third hole of each third stator punching sheet is aligned with the positioning boss;
step two: a group of second stator punching sheets are stacked on the mandrel, and the hole edge of a second hole of each second stator punching sheet is aligned with the hole edge of a third hole of a third stator punching sheet in the step I;
step three: a group of first stator punching sheets are laminated on the mandrel, and first rib portions of the first stator punching sheets are aligned with second rib portions of the second stator punching sheets in the second step; step four: the other group of second stator punching sheets are laminated on the mandrel, a second rib part of each second stator punching sheet is aligned with a first rib part of the first stator punching sheet in the third step, and the second rib part of each second stator punching sheet in the second step are staggered by one first rib part; step five: the other group of third stator punching sheets are stacked on the mandrel, and a third hole of each third stator punching sheet is aligned with the positioning boss;
step six: the rivet penetrates downwards from a rivet hole of the third stator punching sheet in the step five 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 five, the pressing plate is pressed downwards through the press machine to enable the stator core to be tightly pressed, the rivet is riveted to enable the stator core to be fixedly formed, the communicating hole is formed in the periphery of the stator core through the milling cutter, the communicating hole is located in the middle of a first hole of the group of first stator punching sheets, and the diameter of the communicating hole is not smaller than the width of the first hole.
3. The method for manufacturing the stator of the closed oil-cooled motor according to claim 2, wherein 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.
4. The method for manufacturing the stator of the closed 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 of the first hole and is an integer.
5. The method for manufacturing a stator of a closed 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 method for manufacturing the stator of the closed oil-cooled motor according to claim 1, wherein the laminated height L3 of the third stator lamination is equal to the depth of a 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 at equal intervals.
8. The method for manufacturing a stator of a closed oil-cooled motor according to any one of claims 1 to 7, wherein the first hole, the second hole, and the third hole are arc-shaped elongated holes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010890796.8A CN112104172B (en) | 2020-08-29 | 2020-08-29 | Method for manufacturing stator of closed oil-cooled motor |
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| CN202010890796.8A CN112104172B (en) | 2020-08-29 | 2020-08-29 | Method for manufacturing stator of closed oil-cooled motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010263715A (en) * | 2009-05-08 | 2010-11-18 | Honda Motor Co Ltd | Motor unit |
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| CN204858766U (en) * | 2015-07-31 | 2015-12-09 | 比亚迪股份有限公司 | Stator core and motor |
| CN105406658B (en) * | 2015-12-10 | 2017-09-05 | 中船重工电机科技股份有限公司 | Thin yoke iron core laminated processing tool and its processing method |
| CN205544826U (en) * | 2016-03-21 | 2016-08-31 | 河北丰维机械制造有限公司 | Stator core folds and presses frock |
| CN110808645B (en) * | 2019-11-04 | 2021-11-12 | 合肥巨一动力系统有限公司 | Cooling structure applied to oil-cooled flat wire motor stator |
| CN211183563U (en) * | 2019-11-28 | 2020-08-04 | 武汉海王机电工程技术有限公司 | Liquid cooling stator core and motor |
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| JP2010263715A (en) * | 2009-05-08 | 2010-11-18 | Honda Motor Co Ltd | Motor unit |
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