CN111463933A - Motor cooling structure and motor - Google Patents
Motor cooling structure and motor Download PDFInfo
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- CN111463933A CN111463933A CN202010430505.7A CN202010430505A CN111463933A CN 111463933 A CN111463933 A CN 111463933A CN 202010430505 A CN202010430505 A CN 202010430505A CN 111463933 A CN111463933 A CN 111463933A
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- cooling
- central shaft
- pipe
- cavity
- hole
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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
- H02K1/20—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
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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
- 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)
Abstract
The invention is suitable for the technical field of motor equipment, and provides a motor cooling structure and a motor. The motor cooling structure comprises a stator core, a stator winding, a central shaft, a liquid inlet pipeline, a liquid outlet pipeline, a header body assembly and a cooling pipe. The central shaft is provided with a central shaft hole, and the central shaft is provided with a first end and a second end along the axial direction. The collecting body assembly is adjacent to the second end and is connected with the stator core or the central shaft, a first cavity and a second cavity are formed, the first cavity is communicated with the liquid inlet pipeline, and the second cavity is communicated with the liquid outlet pipeline. The cooling pipes are provided with a plurality of cooling pipes, and each cooling pipe penetrates through at least one iron core groove. According to the motor cooling structure provided by the invention, the liquid inlet pipeline, the first cavity, the cooling pipe, the second cavity and the liquid outlet pipeline are arranged for cooling liquid generated by the external cooling liquid circuit to sequentially pass through, and the cooling pipe penetrating through the iron core groove is used for directionally cooling the stator iron core and the stator winding, so that the problem of high temperature rise of the motor stator caused by the winding is solved.
Description
Technical Field
The invention belongs to the technical field of motor equipment, and particularly relates to a motor cooling structure and a motor.
Background
The cooling system of traditional motor adopts fan cooling and air current cooling mostly, and the applicant finds that the principle of this kind of cooling system is all to carry out the heat exchange with external air current, but the air current can only circulate between stator and rotor air gap, can not direct action in inside motor winding and the iron core, because the winding buries in the iron core inslot and the parcel has multilayer insulating material, the radiating effect is poor, is unfavorable for the long-term and high frequency work of motor.
Disclosure of Invention
The invention aims to provide a motor cooling structure, and aims to solve or at least improve the technical problem that the existing motor stator is poor in cooling and heat dissipation effects to a certain extent.
In order to achieve the above object, the present invention adopts a technical solution that provides a motor cooling structure, including:
the stator core is formed by laminating a plurality of silicon steel sheets, and each silicon steel sheet is provided with a central hole and a plurality of core slots arranged along the circumferential direction of the silicon steel sheet;
a stator winding wound on the stator core;
the central shaft is positioned in the central hole and connected with the stator core, the central shaft is provided with a central shaft hole which penetrates through the central shaft along the axial direction of the central shaft, and the central shaft is provided with a first end and a second end opposite to the first end along the axial direction of the central shaft;
the liquid inlet pipeline is arranged in the central shaft hole in a penetrating mode and communicated with an external cooling liquid channel at the first end;
the liquid outlet pipeline is arranged in the central shaft hole in a penetrating mode and communicated with an external cooling liquid channel at the first end;
the manifold body assembly is close to the second end, is connected with the stator core or the central shaft and is provided with a first cavity and a second cavity, the first cavity is communicated with the liquid inlet pipeline, and the second cavity is communicated with the liquid outlet pipeline; and
the cooling pipes are arranged in the at least one iron core groove in a penetrating mode and provided with a first cooling pipe port and a second cooling pipe port, and the first cooling pipe port and the second cooling pipe port are communicated with the first cavity and the second cavity respectively.
Further, the cooling pipe comprises a first straight pipe portion, a second straight pipe portion and a bent pipe portion used for communicating the first straight pipe portion with the second straight pipe portion, the first port of the cooling pipe and the second port of the cooling pipe are respectively formed in the first straight pipe portion and the second straight pipe portion, and the first straight pipe portion and the second straight pipe portion are respectively penetrated into two adjacent iron core grooves.
Further, the cooling pipe is a metal or metal alloy member, and the motor cooling structure further includes an insulating member for wrapping the cooling pipe so as to maintain the cooling pipe in an insulating state with respect to the stator core and the stator winding.
Further, the insulating piece is insulating paper.
Further, the first straight pipe part and the second straight pipe part are the same in structure and shape, the first straight pipe part and the second straight pipe part are located at the bottom of the iron core groove and between the stator windings respectively, and the periphery of the first straight pipe part is provided with an arc-shaped surface matched with the bottom of the iron core groove and a flat surface used for avoiding the stator windings.
Further, the header body assembly comprises a first end cover and a second end cover, the first end cover is adjacent to the stator core and is connected with the stator core or the central shaft, and the second end cover is positioned on one side, far away from the stator core, of the first end cover and is connected with the first end cover;
the first cavity is arranged between the first end cover and the second end cover;
the second cavity is formed between the first end cover, the central shaft and the stator core.
Furthermore, the manifold body assembly further comprises a manifold body which is sleeved on the periphery of the central shaft and connected with the stator core or the central shaft, the manifold body is further connected with the first end cover and the second end cover respectively, and the cooling pipes are mounted and fixed on the manifold body respectively;
a first through hole and a second through hole for the first port of the cooling pipe to pass through are respectively formed in the manifold body and the first end cover, and the first port of the cooling pipe is communicated with the first cavity after passing through the first through hole and the second through hole;
and a third through hole for the second port of the cooling pipe to pass through is further formed in the manifold body, and the second port of the cooling pipe passes through the third through hole and is communicated with the second cavity.
Further, the motor cooling structure still including install in first end and shutoff the coupling of first end, the feed liquor pipeline is including wearing to locate the downthehole feed liquor pipe of center pin, be equipped with the confession on the coupling the feed liquor pipe penetrates to the downthehole first coupling hole of center pin, be equipped with the confession on the first end cover the feed liquor pipe penetrates and makes the feed liquor pipe with the fourth via hole of first chamber intercommunication.
Furthermore, the central shaft hole is communicated with the second cavity, a pipe joint liquid path used for communicating the central shaft hole with an external cooling liquid path is arranged on the pipe joint, and the central shaft hole and the pipe joint liquid path form the liquid outlet pipeline.
Another object of the present invention is to provide an electric machine including the above electric machine cooling structure.
Compared with the prior art, the motor cooling structure provided by the invention has the advantages that the liquid inlet pipeline, the first cavity, the cooling pipe, the second cavity and the liquid outlet pipeline which are used for allowing cooling liquid generated by an external cooling liquid path to sequentially pass through are arranged, and the stator core and the stator winding are directly cooled through the cooling pipe penetrating the core slot, so that the problem of high temperature rise of the motor stator caused by the winding is solved, and the efficiency of the motor is effectively improved.
Drawings
FIG. 1 is an axial cross-sectional view of a motor cooling structure (along a central axis) provided by an embodiment of the present invention;
FIG. 2 is a schematic radial cross-sectional view of a motor cooling structure (along a central axis) provided by an embodiment of the present invention;
FIG. 3 is a schematic view of the stator winding and cooling tube of FIG. 2 fitted in the core slots;
fig. 4 is a schematic view of the cooling tube of fig. 1.
In the figure: 100. a stator core; 110. an iron core groove; 200. a central shaft; 210. a central shaft hole; 300. a stator winding; 400. a cooling tube; 410. a first straight pipe portion; 420. a second straight tube portion; 430. a bent pipe portion; 500. a manifold body assembly; 510. a first end cap; 520. a second end cap; 530. a manifold body; 540. a first chamber; 550. a second chamber; 600. an insulating member; 700. a pipe joint; 710. a pipe joint liquid path; 800. a liquid inlet pipe; 900. a liquid inlet pipe mounting member; 1000. a winding insulator.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," "tail," and the like, indicate orientations or positional relationships that are based on the orientations or positional relationships illustrated in the drawings, are used for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the invention.
It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Further, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 4, an embodiment of a cooling structure of a motor according to the present invention will now be described. The motor cooling structure includes a stator core 100, a stator winding 300, a central shaft 200, a liquid inlet pipeline, a liquid outlet pipeline, a header assembly 500 and a cooling pipe 400.
The stator core 100 is formed by laminating a plurality of silicon steel sheets, and each silicon steel sheet has a central hole and a plurality of core slots 110 arranged along the circumferential direction of the silicon steel sheet (around the central hole). The stator winding 300 is wound on the stator core 100. The center shaft 200 is located in the center hole and connected to the stator core 100, and a center shaft hole 210 is provided to penetrate in the axial direction of the center shaft 200, and the center shaft 200 has a first end and a second end opposite to the first end in the axial direction thereof. It should be noted that the structures and connection relationships of the stator core 100, the central shaft 200 and the stator winding 300 are all in the prior art, and are not described in detail herein.
The liquid inlet pipeline (the whole or partial structure) is arranged in the central shaft hole 210 in a penetrating way and is communicated with the external cooling liquid path at one side of the first end of the central shaft 200; the liquid outlet pipe (all or part of the structure) is also inserted into the central shaft hole 210 and communicates with the external cooling liquid passage on the first end side of the central shaft 200. The external cooling liquid path can be a conventional cooling circuit or a cooling device such as an oil cooler, a water cooler and the like.
The manifold body assembly 500 is located at a second end side of the central shaft 200 and connected to the stator core 100 or the central shaft 200, the manifold body assembly 500 (by itself or in cooperation with other components) forms a first cavity 540 and a second cavity 550, the first cavity 540 and the second cavity 550 are respectively used for storing cooling liquid, and the first cavity 540 and the second cavity 550 are relatively sealed and cannot be directly communicated with each other. The first chamber 540 is in fluid communication with the inlet line and the second chamber 550 is in fluid communication with the outlet line.
The cooling pipes 400 are provided in a plurality, one cooling pipe 400 penetrates through at least one core groove 110, and one cooling pipe 400 corresponds to at least one core groove 110. The cooling tube 400 has a first cooling tube port and a second cooling tube port, which are respectively communicated with the first cavity 540 and the second cavity 550, so that the cooling tube 400 becomes a carrier for communicating the first cavity 540 and the second cavity 550 and allowing the cooling fluid to flow through and dissipate heat to the stator core 100 and the stator winding 300 in the core slot 110. The material of the cooling pipe 400 is not limited, and it may be a hard pipe or a flexible pipe. The connection mode of the cooling pipe 400 is not limited, and it is only necessary to ensure that both ends are respectively connected with the first chamber 540 and the second chamber 550. The cooling pipe 400 is inserted into the core barrel 110, and if the cooling pipe 400 is made of a hard pipe material, it may be fixed in the core barrel 110 (for example, the cooling pipe 400 is connected to the manifold body assembly 500), and if the cooling pipe 400 is made of a soft pipe material, the cooling pipe 400 may not be fixed, and it may have a certain fluctuation amount in the core barrel 110.
Therefore, cooling liquid generated by the external cooling liquid path sequentially flows back to the external cooling liquid path through the liquid inlet pipeline, the first cavity 540, the cooling pipe 400, the second cavity 550 and the liquid outlet pipeline, the liquid inlet pipeline, the first cavity 540, the cooling pipe 400, the second cavity 550 and the liquid outlet pipeline form a stator cooling liquid pipeline for the cooling liquid to sequentially flow through, the stator cooling liquid pipeline directly carries out directional cold emission (heat exchange) to the inside of the stator core 100 and the stator winding 300 by introducing low-temperature cold energy of the cooling liquid generated by the external cooling liquid path and utilizing the cooling pipe 400, the effect of cooling the stator core 100 and the stator winding 300 is achieved, the heat emission effect of the motor, particularly the stator part is improved, the problem of high temperature rise of the motor stator caused by the winding is solved, and the long-term and high-frequency work of the motor is facilitated.
Compared with the prior art, the motor cooling structure provided by the embodiment of the invention has the advantages that the liquid inlet pipeline, the first cavity, the cooling pipe, the second cavity and the liquid outlet pipeline which are used for allowing cooling liquid generated by the external cooling liquid channel to sequentially pass through are arranged, and the stator core and the stator winding are directly cooled through the cooling pipe penetrating the core slot, so that the problem of high temperature rise of the motor stator caused by the winding is solved, and the efficiency of the motor is effectively improved.
As a specific embodiment of the motor cooling structure provided by the present invention, the coolant in the stator coolant pipeline is an aqueous solution to which an antirust agent and an antifreeze agent are added.
Referring to fig. 1 to 4, as an embodiment of the motor cooling structure provided by the present invention, a cooling pipe 400 includes a first straight pipe portion 410, a second straight pipe portion 420, and an elbow pipe portion 430. The cooling pipe first port and the cooling pipe second port are respectively arranged at one end of the first straight pipe part and one end of the second straight pipe part, and the other end of the first straight pipe part and the other end of the second straight pipe part are communicated through the connecting bent pipe part 430. The first straight pipe portion 410 and the second straight pipe portion 420 penetrate through the two adjacent core slots 110 respectively, so that the two adjacent core slots 110 and the stator winding 300 can be cooled.
Referring to fig. 2, as a specific embodiment of the motor cooling structure provided by the present invention, the number of the core slots 110 is 2n, n is a positive integer greater than 1, the number of the cooling pipes 400 is n, each cooling pipe 400 corresponds to two adjacent core slots, and the first straight pipe portion 410 and the second straight pipe portion 420 of each cooling pipe 400 are respectively inserted into two corresponding adjacent core slots 110. This eventually achieves cooling of each core slot 110 and the stator winding 300 inserted into each core slot 110.
Referring to fig. 3, in order to avoid the electric conduction between the cooling tube 400 and the stator core 100 and the stator windings 3, the cooling tube 400 is a metal or metal alloy member according to a specific embodiment of the cooling structure of the electric motor provided by the present invention, and the cooling structure of the electric motor provided by the embodiment of the present invention includes an insulating member 600 for wrapping the cooling tube 400 so as to insulate the cooling tube 400 from the stator core 100 and the stator windings 3. It should be understood that, in the prior art, the stator windings 300 in the same core slot 110 are also insulated by surrounding the winding insulator 1000, and the insulator 600 functions and uses in a similar manner to the winding insulator 1000. Alternatively, the insulator 600 and the winding insulator 1000 may be conventional insulating members such as an insulating tape or an insulating cloth. Alternatively, the cooling pipe 400 may be made of iron, aluminum, or the like.
As a specific embodiment of the motor cooling structure provided in the present invention, the cooling pipe 400 is a member made of a copper material or a copper alloy material. The copper or copper alloy member has a good heat dissipation effect, so that the cooling pipe 400 can be conveniently and rapidly thermally transferred with the stator core 100 and the stator winding 300.
As a specific embodiment of the cooling structure of the motor provided in the present invention, the insulating member 600 is a common insulating paper. The insulating paper may be wrapped around the outer peripheries of the first straight tube portion 410 and the second straight tube portion 420, respectively.
Referring to fig. 2 to 4, as a specific embodiment of the motor cooling structure provided by the present invention, the first straight pipe portion 410 and the second straight pipe portion 420 have the same structure and shape. The first straight tube part 410 and the second straight tube part 420 are located between the groove bottom of the core groove 110 and the stator winding 330, respectively, so that the first straight tube part 410 and the second straight tube part 420 can better perform sufficient heat transfer with the stator core 100 and the stator winding 300.
The outer circumferential structure of the first straight tube part 410 has an arc-shaped surface adapted to the bottom of the core slot 110 and a straight surface for facilitating the installation of the stator winding 300, and in fact, the first straight tube part 410 is a hollow tube structure like a semicircle. In this way, the first straight tube portion 410 and the second straight tube portion 420 are inserted into the core slots 110, but the space occupied by the core slots 110 can be reduced as much as possible, so that the stator winding 300 can be wound.
Referring to fig. 1, as an embodiment of the cooling structure of the motor according to the present invention, the header assembly 500 includes a first end cap 510 and a second end cap 520, the first end cap 510 is adjacent to the stator core 100 and connected to the stator core 100 or the central shaft 200, and the second end cap 520 is located at a side of the first end cap 510 away from the stator core 100 and connected to the first end cap 510.
The first chamber 540 is configured between the first end cap 510 and the second end cap 520.
The second cavity 550 is configured between the first end cap 510 and the center shaft 200 and the stator core 100, that is, the second cavity 550 is closer to the stator core 100 side than the first cavity 540. This makes full use of the axial space on the second end side of the central shaft 200, facilitates the realization that different cooling tubes 400 can be arranged in a uniform shape, and conveniently communicate with the first chamber 540 and the second chamber 550.
Referring to fig. 1, as an embodiment of the motor cooling structure provided by the present invention, the header assembly 500 further includes a header 530 disposed around the central shaft 200 and connected to the stator core 100 or the central shaft 200, and the header 530 is further connected to the first end cap 510 and the second end cap 520, respectively. The first and second end caps 510 and 520 are not directly connected, but indirectly connected by the manifold body 530. The first end cap 510 is not directly connected to the stator core 100 or the central shaft 200, but is indirectly connected to the stator core 100 or the central shaft 200 through the junction pipe 530.
The first end cap 510 and the second end cap 520 are spaced apart, the first chamber 540 is positioned between the first end cap 510 and the second end cap 520, and the second chamber 550 is also positioned substantially between the manifold body 530, the central shaft 200, and the first end cap 510.
The manifold body 530 and the first end cap 510 are respectively provided with a first via hole (not shown) and a second via hole (not shown) for the first port of the cooling pipe (or the first straight pipe portion 410) to pass through, and the first port of the cooling pipe passes through the first via hole and the second via hole and then is communicated with the first cavity 540; the junction pipe body 530 is further provided with a third through hole (not shown) for the second port of the cooling pipe (or the second straight pipe portion 420) to pass through, and the second port of the cooling pipe passes through the third through hole to be communicated with the second cavity 550. It should be understood that the cavity boundary of the second cavity 550 should avoid the position of the second via hole to avoid the direct communication between the second cavity 550 and the first cavity 540. Of course, it should be understood that the first straight pipe portion 410 is necessarily sealed with at least the second through hole to ensure the relative tightness of the first cavity 540, and the second straight pipe portion 420 is sealed with the third through hole to ensure the relative tightness of the second cavity 550.
Referring to fig. 1, as a specific embodiment of the motor cooling structure provided by the present invention, the first end cap 510 and the second end cap 520 are both of a disk-shaped revolving structure, the header 530 is a revolving structure sleeved on the outer periphery of the central shaft 200, the header 530 is further provided with an annular protruding structure extending toward the second end cap 520, and the first end cap 510 and the second end cap 520 are connected to the protruding structure, so as to realize the spacing arrangement between the first end cap 510 and the second end cap 520 and the spacing arrangement between the first end cap 510 and the header 530. Of course, the connection of the first and second end caps 510 and 520 to the protruding structures, respectively, is necessarily a sealing connection to achieve the hermeticity of the first and second chambers 540 and 550.
As an embodiment of the motor cooling structure provided in the present invention, the header body 530 is directly connected to the center shaft 200.
As a specific embodiment of the motor cooling structure provided in the present invention, the cooling tube 400 is connected to the header body 530 to fix the cooling tube 400. Alternatively, the cooling tubes 400 may be secured to the header body 530 by a threaded connection. Optionally, bolts are fixedly arranged on the cooling pipe 400, bolt through holes for the bolts to pass through are formed in the manifold body 530, and the bolts pass through the sealing gaskets and the bolt through holes and then are in threaded connection with nuts to fix the cooling pipe 400 on the manifold body 530.
Referring to fig. 1, as a specific implementation manner of the motor cooling structure provided by the present invention, the motor cooling structure provided by the embodiment of the present invention further includes a pipe joint 700 installed at the first end of the central shaft 200 and used for plugging the central shaft hole 210 at the first end side. The liquid inlet pipeline includes a liquid inlet pipe 800 penetrating through the central shaft hole 210, a first pipe joint hole for the liquid inlet pipe 800 to penetrate into the central shaft hole 210 is formed in the pipe joint 700, and a fourth through hole for the liquid inlet pipe 800 to penetrate and enable the liquid inlet pipe 800 to be communicated with the first cavity 540 is formed in the first end cover 510. The liquid inlet pipe 800 is also in communication with an external coolant path.
Referring to fig. 1, as a specific embodiment of the cooling structure of the motor according to the present invention, the central shaft hole 210 is directly communicated with the second chamber 550, the pipe joint 700 is provided with a pipe joint fluid path 710 for communicating the central shaft hole 210 with an external cooling fluid path, and the central shaft hole 210 and the pipe joint fluid path form a fluid outlet line. Thus, the existing central shaft 200 and the existing central shaft hole 210 are used to form a part of the liquid outlet pipeline naturally, and the cost of adding a new pipe body structure is avoided.
Referring to fig. 1, as a specific implementation manner of the motor cooling structure provided by the present invention, the motor cooling structure provided by the embodiment of the present invention further includes a liquid inlet pipe installation component 900, the liquid inlet pipe installation component 900 is in a sleeve structure, a lower end of the liquid inlet pipe 800 is fixed inside the liquid inlet pipe installation component 900, an outer side of the liquid inlet pipe installation component 900 is fixed in the fourth through hole, and the liquid inlet pipe installation component 900 can fix the liquid inlet pipe 800 and can also achieve sealing of the liquid inlet pipe 800 and the fourth through hole.
As a specific embodiment of the motor cooling structure provided by the present invention, the header body 530, the first end cap 510, and the second end cap 520 are made of engineering plastics with properties similar to those of metals, and have good strength, heat resistance, and insulation properties.
The invention also provides a motor, which comprises the motor cooling structure in the embodiment. Of course, it should be understood that the motor will generally include conventional structures such as a rotor and a casing, which are all in the prior art and will not be described in detail herein. It should also be understood herein that the motor provided by the present invention can be applied as an outer rotor type motor.
Compared with the prior art, the motor provided by the embodiment of the invention has the advantages that the liquid inlet pipeline, the first cavity, the cooling pipe, the second cavity and the liquid outlet pipeline which are used for allowing cooling liquid generated by the external cooling liquid path to sequentially pass through are arranged, and the stator core and the stator winding are directly cooled through the cooling pipe penetrating the core slot, so that the problem of high temperature rise of the motor stator caused by the winding is solved, and the efficiency of the motor is effectively improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Motor cooling structure, its characterized in that includes:
the stator core is formed by laminating a plurality of silicon steel sheets, and each silicon steel sheet is provided with a central hole and a plurality of core slots arranged along the circumferential direction of the silicon steel sheet;
a stator winding wound on the stator core;
the central shaft is positioned in the central hole and connected with the stator core, the central shaft is provided with a central shaft hole which penetrates through the central shaft along the axial direction of the central shaft, and the central shaft is provided with a first end and a second end opposite to the first end along the axial direction of the central shaft;
the liquid inlet pipeline is arranged in the central shaft hole in a penetrating mode and communicated with an external cooling liquid channel at the first end;
the liquid outlet pipeline is arranged in the central shaft hole in a penetrating mode and communicated with an external cooling liquid channel at the first end;
the manifold body assembly is close to the second end, is connected with the stator core or the central shaft and is provided with a first cavity and a second cavity, the first cavity is communicated with the liquid inlet pipeline, and the second cavity is communicated with the liquid outlet pipeline; and
the cooling pipes are arranged in the at least one iron core groove in a penetrating mode and provided with a first cooling pipe port and a second cooling pipe port, and the first cooling pipe port and the second cooling pipe port are communicated with the first cavity and the second cavity respectively.
2. The motor cooling structure according to claim 1, wherein the cooling pipe includes a first straight pipe portion, a second straight pipe portion, and an elbow portion for communicating the first straight pipe portion with the second straight pipe portion, the first cooling pipe port and the second cooling pipe port are respectively formed in the first straight pipe portion and the second straight pipe portion, and the first straight pipe portion and the second straight pipe portion are respectively inserted into two adjacent core slots.
3. The motor cooling structure according to claim 2, wherein the cooling pipe is a metal or metal alloy member, and further comprising an insulating member for wrapping the cooling pipe to maintain the cooling pipe in an insulated state with respect to the stator core and the stator winding.
4. The motor cooling structure according to claim 3, wherein the insulating member is an insulating paper.
5. The motor cooling structure according to claim 2, wherein the first straight pipe portion and the second straight pipe portion are identical in structure and shape and are respectively located between a slot bottom of the core slot and the stator winding, and an outer periphery of the first straight pipe portion has an arc-shaped surface adapted to the slot bottom of the core slot and a flat surface for avoiding the stator winding.
6. The electric machine cooling structure according to any one of claims 1 to 5, wherein the manifold body assembly includes a first end cap adjacent to the stator core and connected to the stator core or the center shaft, and a second end cap located on a side of the first end cap remote from the stator core and connected to the first end cap;
the first cavity is arranged between the first end cover and the second end cover;
the second cavity is formed between the first end cover, the central shaft and the stator core.
7. The motor cooling structure according to claim 6, wherein the manifold body assembly further includes a manifold body that is fitted around the outer periphery of the central shaft and is connected to the stator core or the central shaft, the manifold body is further connected to the first end cap and the second end cap, respectively, and each of the cooling pipes is mounted and fixed to the manifold body;
a first through hole and a second through hole for the first port of the cooling pipe to pass through are respectively formed in the manifold body and the first end cover, and the first port of the cooling pipe is communicated with the first cavity after passing through the first through hole and the second through hole;
and a third through hole for the second port of the cooling pipe to pass through is further formed in the manifold body, and the second port of the cooling pipe passes through the third through hole and is communicated with the second cavity.
8. The motor cooling structure according to claim 7, further comprising a pipe joint installed at the first end and blocking the first end, wherein the liquid inlet pipe includes a liquid inlet pipe inserted into the central axial hole, the pipe joint is provided with a first pipe joint hole for the liquid inlet pipe to penetrate into the central axial hole, and the first end cap is provided with a fourth through hole for the liquid inlet pipe to penetrate and communicate with the first cavity.
9. The motor cooling structure according to claim 8, wherein the central shaft hole communicates with the second chamber, and a pipe joint fluid path for communicating the central shaft hole with an external cooling fluid path is provided on the pipe joint, and the central shaft hole and the pipe joint fluid path form the fluid outlet line.
10. An electric machine, characterized by comprising an electric machine cooling structure according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010430505.7A CN111463933B (en) | 2020-05-20 | 2020-05-20 | Motor cooling structure and motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010430505.7A CN111463933B (en) | 2020-05-20 | 2020-05-20 | Motor cooling structure and motor |
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| Publication Number | Publication Date |
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| CN111463933A true CN111463933A (en) | 2020-07-28 |
| CN111463933B CN111463933B (en) | 2021-10-12 |
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| CN202010430505.7A Active CN111463933B (en) | 2020-05-20 | 2020-05-20 | Motor cooling structure and motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332568A (en) * | 2020-11-24 | 2021-02-05 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | In-groove water-cooled motor stator |
| CN114448118A (en) * | 2022-03-25 | 2022-05-06 | 江苏嘉轩智能工业科技股份有限公司 | Heat dissipation mechanism of outer rotor roller motor stator |
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| CN1057551A (en) * | 1990-06-15 | 1992-01-01 | 通用电气公司 | The liquid cools of rotor |
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| CN114448118A (en) * | 2022-03-25 | 2022-05-06 | 江苏嘉轩智能工业科技股份有限公司 | Heat dissipation mechanism of outer rotor roller motor stator |
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| CN111463933B (en) | 2021-10-12 |
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