CN217956793U - Cooling structure of motor stator - Google Patents

Abstract

The utility model discloses a motor stator's cooling structure, it includes the motor stator who comprises the silicon steel sheet, the silicon steel sheet at both ends is first silicon steel sheet and second silicon steel sheet respectively around being located, all the other silicon steel sheets are middle silicon steel sheet, the import that link up around being equipped with on the first silicon steel sheet, the export that link up around being equipped with on the second silicon steel sheet, be equipped with on the middle silicon steel sheet with the import corresponding and around the first ferryboat of crossing that link up, still be equipped with on the middle silicon steel sheet with the export corresponding and around the second that link up cross the ferryboat, the first coolant access channel that constitutes motor stator of ferryboat of crossing of the ferryboat of a plurality of middle silicon steel sheets, the second of a plurality of middle silicon steel sheets crosses the ferryboat and has formed motor stator's coolant outflow passageway, evenly encircle cloth has a plurality of cooling through-holes on the border of middle silicon steel sheet of adjacent, cooling through-hole stagger setting and can communicate each other. The utility model has the advantages of simple structure, reliable sealing, heat exchange area reaching and good heat dissipation effect.

Description

Cooling structure of motor stator

Technical Field

The utility model relates to a motor stator's cooling structure.

Background

The motor is in the operation in-process, because the coil has the resistance to generate heat certainly, and the electric current can produce the vortex in the iron core and generate heat moreover, if the heat can't in time be shed, then can lead to the motor temperature to rise constantly, and the temperature rises the back, and the inside resistance of motor also can increase, leads to the efficiency and the power output of motor to drop sharply. In addition, high temperature can damage coil insulation and bearing lubrication failure, thereby causing motor burnout. In the prior art, all adopt coolant to cool off for motor stator, coolant passes through the one end import of stator, gets into the stator that piles up by the silicon steel sheet and form, and the inside passageway that has integrateed the coolant circulation of stator, after coolant flows through this passageway, directly carries out the heat exchange with the silicon steel sheet, and coolant after the heat exchange is discharged from the stator other end export, takes away the heat that stator core produced to realize motor stator's cooling.

The patent application document No. CN108768011A discloses a motor stator cooling structure, which comprises a stator core lamination and end pressing plates arranged at two ends of the stator core lamination, wherein the stator core lamination is provided with a plurality of axial channels, one side of each end pressing plate, which is close to the stator core lamination, is provided with a circumferential groove and a radial groove which are sealed with the stator core lamination and communicated with the channels, and the other side of each end pressing plate is provided with a through hole communicated with the circumferential groove and the radial groove; the through holes at the two ends are respectively an inlet and an outlet of a cooling medium. By utilizing the invention, the cooling working medium can be smoothly introduced into the stator core, the thermal resistance from a heating point to a heat dissipation point of the motor is reduced, the heat is more directly and effectively taken away, and the original axial ventilation cooling mode is not influenced, so that the heat dissipation condition of the motor can be improved, and the temperature rise of the motor is reduced. In the structure, the cooling medium enters from the inlet and passes through the axial channel, the circumferential groove and the radial groove which are communicated with the channel, but the flowability of the cooling medium is easy to cause problems; in order to reduce the loss of the iron core, the width of the T-shaped structure is generally narrow, a cooling medium channel is added in the T-shaped structure, the circulating flow is limited, and therefore the heat dissipation power is low; the linear cooling medium channel in the above patent document has a long shape, and has problems of a low heat exchange area, a poor turbulent flow capability of the cooling medium, and the like.

Disclosure of Invention

The to-be-solved technical problem of the present invention is to provide a cooling structure for motor stator, which can control the distance between the cooling medium channel and the edge, the width of the sealing belt is not limited, the sealing reliability is better, the area of the cooling medium channel can be designed reasonably according to the actual heat dissipation requirement, and is not limited by the structure of the stator core lamination; and realize that bigger heat transfer area is bigger and then improve the cooling effect of stator.

In order to solve the technical problem, the cooling structure of the motor stator comprises the motor stator consisting of a plurality of silicon steel sheets which are stacked together, wherein the silicon steel sheets positioned at the front end and the rear end are respectively a first silicon steel sheet and a second silicon steel sheet, and the rest of the silicon steel sheets are intermediate silicon steel sheets.

The two adjacent front and back intermediate silicon steel sheets are a group of silicon steel sheet groups, and the width of a communication part between the cooling through opening of the front intermediate silicon steel sheet in the group of silicon steel sheet groups and the cooling through opening of the back intermediate silicon steel sheet is not less than half of the length of the cooling through opening.

And the inlet of the first silicon steel sheet is connected with a cooling medium inlet pipe.

And the outlet of the second silicon steel sheet is connected with a cooling medium outflow pipe.

And the inlet of the first silicon steel sheet and the outlet of the second silicon steel sheet are symmetrically arranged with the center of the motor stator.

And the first silicon steel sheet, the second silicon steel sheet and the middle silicon steel sheet are all provided with dislocation preventing bulges and dislocation preventing grooves corresponding to the dislocation preventing bulges.

The cooling through hole is oval, long strip, square or round.

After the structure is adopted, because the discontinuous cooling through holes are arranged on the silicon steel sheets of the motor stator, a continuous cooling medium flow channel is formed by utilizing the dislocation of the discontinuous cooling through holes of the adjacent silicon steel sheets after stacking; the flow channels of the cooling medium are symmetrically designed, so that the flowing uniformity of the cooling medium is better, and the heat exchange of the uniform cooling medium is realized; the shape of the channel can be designed according to the shape of a silicon steel sheet of the motor stator; the motor stator has a mistake-proofing structure when silicon steel sheets of the motor stator are stacked, so that the distance between a cooling medium channel and the edge of the silicon steel sheet can be designed according to needs, the width of a sealing strip is not limited, and the sealing reliability is higher; the area of the cooling medium channel can be designed to be reasonable according to the actual heat dissipation requirement, and is not limited by the structure of a silicon steel sheet of a motor stator; the discontinuous cooling through holes are stacked in a staggered mode, so that the heat exchange area of the cooling medium channel is larger, the flowing turbulence capacity of the cooling medium is high, and efficient heat dissipation is realized. The utility model discloses a silicon steel sheet simple structure does not have too big difference with conventional silicon steel sheet lamination, can stamping forming, and manufacturing cost is equivalent with conventional silicon steel sheet.

To sum up, the utility model has the advantages of simple structure, sealed reliable, heat transfer area reach and the radiating effect is good.

Drawings

The invention will be further described with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 isbase:Sub>A schematic structural view taken along line A-A of FIG. 1;

fig. 3 is a schematic structural view of a second silicon steel sheet in the embodiment of the present invention;

FIG. 4 is a schematic structural view taken along line B-B in FIG. 3;

fig. 5 is a schematic view of the structure of the front intermediate silicon steel sheet in the group of silicon steel sheets in the embodiment of fig. 1;

fig. 6 is a schematic view of the structure of the front intermediate silicon steel sheet in the group of sheets of silicon steel in the embodiment of fig. 1;

FIG. 7 is a perspective view of a group of silicon steel sheets in the embodiment of FIG. 1;

fig. 8 is a schematic perspective view of the embodiment of fig. 1.

Detailed Description

Referring to fig. 1 to 8 shown, the utility model provides a motor stator's cooling structure, for convenient the description, to the left right direction in fig. 1 do the utility model discloses a fore-and-aft direction, it includes the motor stator that the silicon steel sheet that stacks together by the multi-disc constitutes, and the silicon steel sheet that is located both ends around is first silicon steel sheet 1 and second silicon steel sheet 2 respectively, and all the other silicon steel sheets are middle silicon steel sheet 3, link up and supply the import that cooling medium got into around being equipped with on the first silicon steel sheet 1, link up and supply the export that cooling medium flows out around being equipped with on the second silicon steel sheet 2, cooling medium can adopt air or coolant liquid among the prior art, be equipped with on middle silicon steel sheet 3 with the corresponding and around the import and link up first cross ferry mouth 4, still be equipped with on the middle silicon steel sheet 3 with the export corresponding and around and link up the second cross ferry mouth 5, the first cross ferry mouth 4 of a plurality of middle sheets in succession around and constitute motor stator's cooling medium entering passageway, the second of a plurality of continuous middle silicon steel sheets cross ferry mouth 5 and constitute the cooling medium of motor around and the stator around the stator ring around and the ring has two adjacent silicon steel sheet and the cooling medium ring that just stagger 6 around the interval that set up each other and set up around and the stator ring around and communicate each other around the stator ring and set up.

Referring to fig. 1 to 8, in the present embodiment, two intermediate silicon-steel sheets 3 adjacent to each other in the front-rear direction are a group of silicon-steel sheet groups, and the width of the communication portion between the cooling passage opening 6 of the front intermediate silicon-steel sheet 3 and the cooling passage opening 6 of the rear intermediate silicon-steel sheet in the group of silicon-steel sheet groups is not less than half of the length of the cooling passage opening 6, in the present embodiment, the cooling passage opening 6 is in a long strip shape, and the width of the communication portion is exactly equal to half of the length of the cooling passage opening 6.

Referring to fig. 1 to 8, a cooling medium inlet pipe 7 is connected to an inlet of the first silicon steel sheet 1, a cooling medium outlet pipe 8 is connected to an outlet of the second silicon steel sheet 2, and the cooling medium inlet pipe 7 and the connection of the cooling medium outlet pipe 8 and the silicon steel sheets may adopt a structure of welding, bonding and bolt press connection in the prior art, and a specific structure thereof will not be described in detail. The inlet of the first silicon steel sheet 1 and the outlet of the second silicon steel sheet 2 are symmetrically arranged with respect to the center of the motor stator, and fig. 2 shows that the second silicon steel sheet is rotated by 180 degrees to obtain a specific structure of the first silicon steel sheet 1, and the structure can enable the cooling medium to carry out heat exchange cooling on the motor stator at the maximum distance and the maximum area.

Referring to fig. 1 to 8, the first silicon steel sheet, the second silicon steel sheet and the middle silicon steel sheet are respectively provided with a dislocation prevention protrusion and a dislocation prevention groove corresponding to the dislocation prevention protrusion, and the corresponding meaning indicates that the dislocation prevention protrusion on the rear silicon steel sheet abuts against the dislocation prevention groove of the front silicon steel sheet.

Of course, the present invention may have other embodiments, the basic structure of which is the same as the above embodiments, but the difference is that the cooling passage opening may also be oval, square or circular. For another example, three intermediate silicon steel sheets 3 adjacent to each other in the front and rear direction may be used as a set of silicon steel sheets.

The utility model discloses do not receive the restriction of above-mentioned embodiment, at this technical field personnel, based on the utility model discloses the simple replacement of the equivalent change of concrete structure and method step is all in the protection scope of the utility model.

Claims (7)

1. A cooling structure of a motor stator comprises a motor stator consisting of a plurality of silicon steel sheets stacked together, wherein the silicon steel sheets positioned at the front end and the rear end are respectively a first silicon steel sheet and a second silicon steel sheet, and the rest silicon steel sheets are middle silicon steel sheets.

2. The cooling structure of the stator of the motor according to claim 1, wherein: the two adjacent front and back intermediate silicon steel sheets are a group of silicon steel sheet groups, and the width of a communication part between the cooling through opening of the front intermediate silicon steel sheet in the group of silicon steel sheet groups and the cooling through opening of the back intermediate silicon steel sheet is not less than half of the length of the cooling through opening.

3. The cooling structure of the stator of the motor according to claim 1, wherein: and the inlet of the first silicon steel sheet is connected with a cooling medium inlet pipe.

4. The cooling structure of the stator of the motor according to claim 1, wherein: and the outlet of the second silicon steel sheet is connected with a cooling medium outflow pipe.

5. The cooling structure of the motor stator according to any one of claims 1 to 4, wherein: and the inlet of the first silicon steel sheet and the outlet of the second silicon steel sheet are symmetrically arranged in the center of the motor stator.

6. The cooling structure of the motor stator according to any one of claims 1 to 4, wherein: and the first silicon steel sheet, the second silicon steel sheet and the middle silicon steel sheet are all provided with dislocation preventing bulges and dislocation preventing grooves corresponding to the dislocation preventing bulges.

7. The cooling structure of the motor stator according to any one of claims 1 to 4, wherein: the cooling through hole is oval, long strip, square or round.

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