CN112737197A - Motor end cooling water channel and manufacturing method thereof - Google Patents
Motor end cooling water channel and manufacturing method thereof Download PDFInfo
- Publication number
- CN112737197A CN112737197A CN202011613585.6A CN202011613585A CN112737197A CN 112737197 A CN112737197 A CN 112737197A CN 202011613585 A CN202011613585 A CN 202011613585A CN 112737197 A CN112737197 A CN 112737197A
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- Prior art keywords
- cooling water
- water channel
- cooling
- machine shell
- motor
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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
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- 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
- H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention relates to the technical field of motor cooling, in particular to a cooling water channel at the end part of a motor and a manufacturing method thereof. The end part cooling water channel is arranged in the machine shell and arranged on the inner wall of the machine shell cooling water channel, a first end part cooling water channel outlet and a second end part cooling water channel outlet which are symmetrically arranged are formed in the two axial sides of one end of the end part cooling water channel, and connecting joints are arranged at the connecting positions of the first machine shell cooling water channel outlet, the second machine shell cooling water channel outlet and the end part cooling water channel. The end cooling water channel made of the water-soluble material and the pouring sealant does not need to be provided with an internal pipeline, so that the structural integrity is ensured, the loss of a motor is not increased, and the efficient operation is ensured.
Description
Technical Field
The invention relates to the technical field of motor cooling, in particular to a cooling water channel at the end part of a motor and a manufacturing method thereof.
Background
High power density motors are increasingly used in industrial applications, placing higher demands on the size and weight of the motor. The design of the cooling system of the motor is a key for the efficient and stable operation of the motor. At present, oil cooling and water cooling are generally adopted to effectively cool the motor. The oil cooling mode mainly comprises an end spray cooling mode and an immersion oil cooling mode. For end spray cooling, cooling oil is sprayed to the end winding, and the cooling oil is in direct contact with the end winding to take away heat of the end winding so as to reduce temperature rise. But the method can only effectively reduce the temperature of the end winding, and the temperature rise of the winding in the slot is still not effectively inhibited; the immersion type oil cooling mode includes a full immersion type and a stator closed immersion type. The complete immersion type motor shell is characterized in that a sealed space is formed in a motor shell cavity, and cooling oil is filled in the motor cavity to help a stator and a rotor of the motor to dissipate heat. However, this method results in a sharp increase in the friction loss of the rotor, which significantly reduces the efficiency of the motor, especially when the motor is operated at high speed. For the stator closed immersion type, an isolation sleeve is arranged in an air gap to separate and seal the stator and the rotor, so that a heat source of the stator part can be in direct contact with cooling oil, and the problem of large friction loss of the rotor can be avoided. However, the method has high requirements on the sealing of the motor, and once the sealing performance of the stator of the motor is in problem, the reliability and the safety of the operation of the motor are influenced.
Except the oil cooling mode, the cooling of casing water course is comparatively ripe, effectual cooling mode, and the produced heat of loss of parts such as motor stator core and winding passes through stator core and transmits to motor casing, takes away the temperature in order to reduce the motor temperature rise when coolant passes through. However, the heat conductors in the space inside the motor slot and the space of the end winding are very complex, and when the machine shell water channel is adopted for cooling, the temperature rise of the winding in the motor slot and the end winding part is high. Excessive winding temperatures increase motor losses and limit the current density of the motor windings.
Disclosure of Invention
In order to solve the defects mentioned in the background technology, the invention aims to provide a cooling water channel at the end part of a motor and a manufacturing method thereof, which solve the problem that the temperature rise of windings in a slot and the end part of the motor is higher when a machine shell water channel is adopted for cooling, increase the loss of the motor and the like.
The purpose of the invention can be realized by the following technical scheme:
a cooling water channel at the end part of a motor comprises a shell, wherein a shell cooling water channel is arranged in the shell, one end of the shell cooling water channel is provided with a shell cooling water channel inlet, a first shell cooling water channel outlet and a second shell cooling water channel outlet, the shell cooling water channel inlet is positioned at the middle point of the shell in the axial direction, and the first shell cooling water channel outlet and the second shell cooling water channel outlet are symmetrically arranged at two sides of the shell cooling water channel inlet;
an end cooling water channel is arranged in the shell, the end cooling water channel is arranged on the inner wall of the shell cooling water channel, and two first end cooling water channel outlets and second end cooling water channel outlets which are symmetrically arranged are formed in two axial sides of one end of the end cooling water channel and used for discharging cooling media of the end cooling water channel;
and the joints of the first machine shell cooling water channel outlet, the second machine shell cooling water channel outlet and the end cooling water channel are provided with connecting joints, and cooling media are discharged from the first end cooling water channel outlet and the second end cooling water channel outlet.
Further, the machine shell cooling water channel is in a multi-layer spiral shape.
Further, the cooling medium is cooling water, cooling oil and a mixture of water and glycol.
Further, the cooling effect is optimal when the cooling medium is cooling water.
Further, the groove type of the motor is one of a closed groove, a semi-closed groove, an open groove, a flat-bottom groove or a pear-shaped groove.
A manufacturing method of a cooling water channel at the end part of a motor comprises the following steps:
after stator winding work is finished, determining the shape and the size of a water-soluble material pipeline according to the size of an end winding;
secondly, fixing the manufactured water-soluble material pipeline at a corresponding position of the end part and then carrying out encapsulation operation;
and thirdly, after the pouring sealant is completely solidified, introducing water into the water-soluble material, and dissolving the water-soluble material to obtain the required end cooling pipeline.
Furthermore, when the water-soluble material in the second step is fixed at the end part, gaps are reserved between the outer surface of the water-soluble material and the winding and the iron core, the cooling medium is prevented from contacting the winding and the iron core, and meanwhile, the end part cooling water channel can bear certain water pressure.
And further, in the second step, the water-soluble pipeline is pretreated before being placed, all outer surfaces of the pipeline are subjected to potting treatment, so that the surface of the pipeline is attached with a pouring sealant with a certain thickness, and the pipeline is placed at the end part of the winding after being solidified.
Furthermore, the water introduced in the third step is hot water, so that the dissolving speed of the water-soluble material is accelerated.
The invention has the beneficial effects that:
1. the end cooling water channel is made of water-soluble materials and pouring sealant, the stator slot and the end winding are subjected to pouring and sealing treatment, the slot and the end winding are sealed, the heat of the winding is uniformly transferred to the pouring sealant, and the cooling water channel arranged in the end winding area can effectively reduce the temperature rise of the winding in the slot and the end winding;
2. the end cooling water channel made of water-soluble materials and pouring sealant is adopted, the pipeline made of the water-soluble materials is arranged in the end area of the motor, the stator part is integrally subjected to pouring and sealing treatment, after the pouring sealant is fully solidified, water can be introduced to dissolve the water-soluble materials to form the cooling pipeline, the cooling pipeline is arranged in the end winding area of the stator, the overall dimension of the motor cannot be increased, meanwhile, the stator part can be effectively cooled, and the electromagnetic load, the torque density and the power density of the motor can be further improved;
3. the end part cooling water channel is made of water-soluble materials and pouring glue, the machine shell cooling water channel jointly forms a cooling system of the motor, the machine shell cooling water channel is provided with a water inlet and two water outlets, the two water outlets respectively introduce cooling water into the end part cooling water channels on two sides, and then the cooling water is discharged from the water outlet on the upper part of the end part encapsulating area, so that the safe and stable operation of the motor is ensured, and meanwhile, the cooling effect is excellent;
4. according to the invention, the end part cooling water channel made of the water-soluble material and the pouring sealant is adopted, after the pouring sealant is fully solidified and the water-soluble material is completely dissolved, only the pouring sealant exists in the space of the groove and the end part, and an internal pipeline is not required to be arranged, so that the structural integrity is ensured, meanwhile, the loss of the motor is not increased, and the efficient operation is ensured.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall water cooling structure of the stator of the present invention;
FIG. 2 is a schematic view of the enclosure cooling flume and the end cooling flume of the present invention;
the reference numbers are as follows:
1-shell, 2-first end cooling water channel outlet, 3-end winding, 4-pouring sealant, 5-stator, 6-connecting joint, 7-first shell cooling water channel outlet, 8-shell cooling water channel inlet, 9-second shell cooling water channel outlet, 10-end cooling water channel, 11-rotating shaft, 12-rotor, 13-end cover, 14-second end cooling water channel outlet and 15-shell cooling water channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the embodiment of the present invention includes a casing 1, an end winding 3, a stator 5, a rotating shaft 11, a rotor 12, and an end cover 13, wherein a potting adhesive 4 is hermetically disposed in the end winding 3, the windings of the motor can be set as a concentrated winding and a distributed winding, different winding forms only affect the length of the cooling structure, and the windings of the motor can be set as a single-layer winding and a multi-layer winding. The groove type of the motor can be set to be a closed groove, a semi-closed groove, an open groove, a flat bottom groove or a pear-shaped groove, and pouring sealant fully fills the groove opening and a gap in the groove.
As shown in fig. 1 and 2, the cooling water channel at the end of the motor includes a housing cooling water channel 15 disposed in the housing 1, the housing cooling water channel 15 preferably has a multi-layer spiral shape, one end of the housing cooling water channel 15 is provided with a housing cooling water channel inlet 8, a first housing cooling water channel outlet 7 and a second housing cooling water channel outlet 9, the housing cooling water channel inlet 8 is located at a middle point of the housing 1 in the axial direction, the first housing cooling water channel outlet 7 and the second housing cooling water channel outlet 9 are symmetrically disposed at two sides of the housing cooling water channel inlet 8, so as to ensure that the flow rates at the first housing cooling water channel outlet 7 and the second housing cooling water channel outlet 9 in the housing cooling water channel 15 are consistent.
The end portion cooling water channel 10 is arranged in the machine shell 1, the end portion cooling water channel 10 is arranged on the inner wall of the machine shell cooling water channel 15, two first end portion cooling water channel outlets 2 and two second end portion cooling water channel outlets 14 which are symmetrically arranged are formed in two axial sides of one end of the end portion cooling water channel 10 and used for discharging cooling media of the end portion cooling water channel 10, the type of the cooling media is not limited, cooling water, cooling oil, a mixture of water and glycol and other media can be selected, and the cooling effect when cooling water is adopted is optimal.
Wherein the joint of the first housing cooling waterway outlet 7, the second housing cooling waterway outlet 9, and the end cooling waterway 10 is provided with a connection joint 6 so as to introduce the cooling medium in the housing cooling waterway 15 into the end cooling waterway 10 and then to be discharged from the first end cooling waterway outlet 2 and the second end cooling waterway outlet 14.
The end cooling water channel 10 is made of water-soluble materials and pouring sealant in a matching mode, water is introduced after solidification and forming to dissolve the built-in water-soluble materials, and an internal water channel is formed.
Specifically, the type of the water channel in the housing 1 can be freely selected, and the type of the water channel and the parameters of the water channel can be determined according to optimization calculation analysis in actual manufacturing. The two water outlets at the upper part of the casing 1 should be kept symmetrical, and simultaneously, the cooling water channels 10 at the two side ends are ensured to be filled with cooling medium, so as to achieve the best cooling effect.
Specifically, the principle of setting the water inlet and outlet on the lower part of the casing 1 should follow: the flows of the two water outlets are consistent, and the whole machine shell cooling water channel 10 is filled with cooling media, so that the positions of the water inlets and the water outlets can be properly selected and adjusted in combination with the actual situation.
Specifically, the interface positions of the cabinet cooling water passage 15 and the end cooling water passage 10 are determined according to the position of the cabinet cooling water passage 15 and the "low-in-high-out" principle.
A manufacturing method of a cooling water channel at the end part of a motor comprises the following steps:
after stator winding work is finished, determining the shape and the size of a water-soluble material pipeline according to the size of an end winding;
secondly, fixing the manufactured water-soluble material pipeline at a corresponding position of the end part and then carrying out encapsulation operation;
and thirdly, after the pouring sealant is completely solidified, introducing water into the water-soluble material, and dissolving the water-soluble material to obtain the required end cooling pipeline.
Specifically, when the water-soluble material is fixed at the end portion, a certain gap is required to be reserved between the outer surface of the water-soluble material and the winding and the iron core, so that the cooling medium is prevented from contacting the winding and the iron core, and meanwhile, the end portion cooling water channel can bear certain water pressure. Preferably, the water-soluble pipeline is pretreated before being placed, all outer surfaces of the pipeline are subjected to potting treatment, a certain thickness of potting adhesive is attached to the surfaces of the pipeline, and the pipeline is placed at the end part of the winding after being solidified. Preferably, hot water can be selectively injected into the cooling pipe to accelerate the dissolution rate of the water-soluble material.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (9)
1. A cooling water channel at the end part of a motor comprises a machine shell (1) and is characterized in that a machine shell cooling water channel (15) is arranged in the machine shell (1), one end of the machine shell cooling water channel (15) is provided with a machine shell cooling water channel inlet (8), a first machine shell cooling water channel outlet (7) and a second machine shell cooling water channel outlet (9), the machine shell cooling water channel inlet (8) is located at the axial middle point of the machine shell (1), and the first machine shell cooling water channel outlet (7) and the second machine shell cooling water channel outlet (9) are symmetrically arranged on two sides of the machine shell cooling water channel inlet (8);
an end cooling water channel (10) is arranged in the machine shell (1), the end cooling water channel (10) is arranged on the inner wall of the machine shell cooling water channel (15), and two first end cooling water channel outlets (2) and second end cooling water channel outlets (14) which are symmetrically arranged are formed in two axial sides of one end of the end cooling water channel (10) and used for discharging cooling media of the end cooling water channel (10);
and a connecting joint (6) is arranged at the joint of the first machine shell cooling water channel outlet (7), the second machine shell cooling water channel outlet (9) and the end cooling water channel (10), and cooling medium is discharged from the first end cooling water channel outlet (2) and the second end cooling water channel outlet (14).
2. The machine end cooling water channel according to claim 1, characterized in that the machine housing cooling water channel (15) is in the shape of a multi-layer spiral.
3. The electric machine end cooling water channel according to claim 1 or 2, wherein the cooling medium is cooling water, cooling oil, and a mixture of water and glycol.
4. The electric machine end cooling water channel of claim 3, wherein the cooling medium is cooling water for optimal cooling.
5. The electric machine end cooling water channel of claim 1, wherein the slot type of the electric machine is one of a closed slot, a semi-closed slot, an open slot, a flat bottom slot, or a pear shaped slot.
6. A method of manufacturing a motor end cooling water passage, comprising the motor end cooling water passage according to any one of claims 1 to 5, characterized by the steps of:
after stator winding work is finished, determining the shape and the size of a water-soluble material pipeline according to the size of an end winding;
secondly, fixing the manufactured water-soluble material pipeline at a corresponding position of the end part and then carrying out encapsulation operation;
and thirdly, after the pouring sealant is completely solidified, introducing water into the water-soluble material, and dissolving the water-soluble material to obtain the required end cooling pipeline.
7. The method as claimed in claim 6, wherein the water-soluble material in step two is fixed to the end portion, so as to ensure that a gap is left between the outer surface of the water-soluble material and the winding and the iron core, and the cooling medium is prevented from contacting the winding and the iron core, and the end portion cooling water channel can bear a certain water pressure.
8. The method for manufacturing the cooling water channel at the end part of the motor according to claim 6 or 7, wherein in the second step, a pretreatment is performed before the water-soluble pipeline is placed, all outer surfaces of the pipeline are subjected to a potting treatment, a pouring sealant with a certain thickness is attached to the surfaces of the pipeline, and the pipeline is placed at the end part of the winding after being solidified.
9. The method for manufacturing the cooling water channel at the end part of the motor as claimed in claim 6, wherein the water introduced in the third step is hot water, so as to accelerate the dissolution speed of the water-soluble material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613585.6A CN112737197A (en) | 2020-12-30 | 2020-12-30 | Motor end cooling water channel and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613585.6A CN112737197A (en) | 2020-12-30 | 2020-12-30 | Motor end cooling water channel and manufacturing method thereof |
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| CN112737197A true CN112737197A (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011613585.6A Pending CN112737197A (en) | 2020-12-30 | 2020-12-30 | Motor end cooling water channel and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113437825A (en) * | 2021-07-05 | 2021-09-24 | 珠海格力电器股份有限公司 | Motor heat radiation structure, motor and compressor |
| CN115940450A (en) * | 2022-12-27 | 2023-04-07 | 沈阳工业大学 | Permanent magnet motor composite stator water cooling structure |
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| CN109428422A (en) * | 2017-08-31 | 2019-03-05 | 中车株洲电力机车研究所有限公司 | A kind of electric motor winding end cooling device and cooling system |
| CN109450171A (en) * | 2018-11-21 | 2019-03-08 | 中国科学院电工研究所 | A kind of motor of the efficient type of cooling |
| CN111193350A (en) * | 2020-01-19 | 2020-05-22 | 佳木斯电机股份有限公司 | High-speed motor cooling structure |
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| CN101656445A (en) * | 2009-09-14 | 2010-02-24 | 精进电动科技（北京）有限公司 | System and method for cooling motors |
| CN204633513U (en) * | 2014-04-07 | 2015-09-09 | 西门子公司 | The housing of motor, motor and motor vehicle |
| US20180078997A1 (en) * | 2015-04-13 | 2018-03-22 | Hitachi Kokusai Electric Inc. | Liquid-cooling cold plate and method for manufacturing same |
| CN206775255U (en) * | 2017-01-26 | 2017-12-19 | 上海蔚来汽车有限公司 | Stator module, Stator and electrical machine |
| CN107276266A (en) * | 2017-08-02 | 2017-10-20 | 华中科技大学 | A kind of two-way cooling oil-cooled motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113437825A (en) * | 2021-07-05 | 2021-09-24 | 珠海格力电器股份有限公司 | Motor heat radiation structure, motor and compressor |
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| CN115940450A (en) * | 2022-12-27 | 2023-04-07 | 沈阳工业大学 | Permanent magnet motor composite stator water cooling structure |
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Application publication date: 20210430 |