WO2016195148A1

WO2016195148A1 - Case for electric motor and manufacturing method therefor, electric motor with case for electric motor

Info

Publication number: WO2016195148A1
Application number: PCT/KR2015/005820
Authority: WO
Inventors: 김재민; 박노마; 이정구; 민병욱
Original assignee: 엘지전자 주식회사
Priority date: 2015-06-05
Filing date: 2015-06-10
Publication date: 2016-12-08
Also published as: KR101700768B1; KR20160143427A; CN208046365U

Abstract

The present invention relates to a case for an electric motor and a manufacturing method therefor, an electric motor with the case for an electric motor. The case for an electric motor of the present invention comprises: an inner case in which is formed a receiving space for a stator and a rotor; an outer case which is disposed spaced apart along the radial direction at the outside of the inner case and forms a fluid receiving space, both sides of which are opened such that the fluid can be contained between the inner case and the outer case; partition walls which are disposed spaced apart from each other along the circumferential direction of the inner case with one side connected to the inner case and the other side connected to the outer case between the inner case and the outer case, thereby partitioning the fluid receiving space into a plurality of partial receiving spaces; and a fluid communication part which forms a cooling fluid flow passage in which the fluid is moved by blocking up both sides of the fluid receiving space, and at the same time, by making the plurality of partial receiving spaces be in fluid communication with each other. Thus, by increasing the heat transfer area of a cooling fluid, it is possible to improve the cooling performance.

Description

Electric motor case and manufacturing method thereof, electric motor provided with electric motor case

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor case including a motor case, a method for manufacturing the same, and a motor including a case for the motor. More particularly, the case for a motor, a method for manufacturing the same, and a method for manufacturing the motor can be improved by increasing the heat exchange area. It relates to an electric motor having a case.

As is well known, an electric motor is a device that converts electrical energy into mechanical energy by using a force that a current flowing conductor receives in a magnetic field.

Motors are classified into DC motors and AC motors according to the type of power source.

Such an electric motor is usually provided with the stator and the rotor arrange | positioned so that relative movement with respect to the said stator is possible.

The rotor is configured to be able to rotate or linearly reciprocate relative to the stator.

The motor has a case to receive the stator and the rotor.

The temperature of the motor is increased by the heating action of the stator and the rotor during operation.

When the temperature of the motor is excessively increased, the output of the motor is lowered.

In view of this, the case is provided with cooling means.

As the cooling means, air cooling using air and water cooling using a cooling fluid are used.

The water-cooling type is mainly used for electric motors having a relatively high power density and / or heat generation amount.

By the way, in such a conventional electric motor, the spiral cooling fluid flow path is formed around the case, and the heat exchange area of the cooling fluid and the case is relatively small, which limits the cooling performance.

Due to this, there is a problem that the temperature of the stator and / or the rotor is excessively increased and the output (output density) is relatively lowered.

In addition, there is a problem that the flow path of the spiral cooling fluid is difficult to manufacture, thereby increasing the manufacturing cost.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) KR200318453 Y1 (2003.06.18.)

(Patent Document 2) KR1020010036663 A (2001.05.07.)

Accordingly, an object of the present invention is to provide an electric motor case, a manufacturing method thereof, and an electric motor having an electric motor case which can increase the heat exchange area of the cooling fluid to improve the cooling performance.

Another object of the present invention is to provide an electric motor case, a method of manufacturing the same, and an electric motor provided with an electric motor case that can be easily manufactured and can reduce manufacturing costs.

In addition, another object of the present invention is to provide an electric motor case, a manufacturing method thereof, and an electric motor provided with an electric motor case that can reduce weight.

The present invention, in order to achieve the above object, the inner case to form a receiving space of the stator and the rotor therein; An outer case disposed on an outer side of the inner case in a radial direction to form a fluid receiving space in which both sides are open to accommodate the fluid between the inner case and the inner case; A partition wall between the inner case and the outer case connected to the inner case and the other side connected to the outer case and spaced apart along the circumferential direction of the inner case to divide the fluid receiving space into a plurality of partial receiving spaces; And a communication unit which blocks both sides of the fluid receiving space and communicates the plurality of partial receiving spaces with each other to form a cooling fluid flow path through which the fluid is moved.

Here, the inner case and the outer case may be arranged concentrically with each other.

The partition wall may be configured to be parallel to each other along the axial direction.

The communication unit may be configured to include a flow path guide member for guiding the fluid while suppressing the leakage of the fluid is inserted between a portion of the outer case and the inner case.

A cutout cut along the axial direction may be formed at one end of both ends of each of the partition walls.

The cutout may be configured to be alternately formed in each partition wall spaced apart along the circumferential direction of the inner case.

The flow guide member may be configured to have a guide surface formed on both sides of the cutout portion protruding into the fluid receiving space along the axial direction and having a center concave outward.

The flow guide member may be configured to include a flange portion in contact with the ends of the inner case and the outer case.

The motor case may further include a bracket provided at both ends of the inner case and the outer case.

The flange portion may be configured to be in close contact with the end of the inner case and the outer case by the bracket.

The outer case may be configured to include a fastening member coupling portion protruding in a radial direction on the outer surface and the fastening member is coupled to the inside.

The flow guide member may be configured to have an arc shape.

The flow guide member may be configured to have a circular shape.

Concave-convex portion may be formed in the fluid receiving space to increase the surface area.

Brackets are provided at both ends of the inner case and the outer case, respectively, and the communicating part may be configured to be formed on the inner surface of each bracket.

The partition wall may be configured to have a curved cross-sectional shape along the radial direction.

The partition wall may be configured to have a curved cross-sectional shape along the axial direction.

One side of the fluid receiving space may be formed with a fluid inlet through which the fluid is introduced, and the other side of the fluid receiving space may be formed with a fluid outlet for outflow of the fluid.

The fluid inlet and the fluid outlet may be configured to be formed in plural numbers, respectively.

On the other hand, according to another field of the invention, the stator; A rotor disposed in a relative motion relative to the stator; And a case for the electric motor in which the stator is arranged to be heat transferable therein.

In addition, according to another field of the present invention, the inner case is formed in the receiving space therein, the inner side of the inner case is disposed spaced apart in the radial direction between the inner case and the fluid receiving space between the open side Between the outer case, the inner case and the outer case to be formed, one side is connected to the inner case and the other side is connected to the outer case and spaced apart along the circumferential direction of the inner case, the fluid receiving space a plurality of partial receiving space Integrally forming a partition partitioning into a space; And blocking both sides of the fluid receiving space and communicating the partial receiving space to form a cooling fluid flow path through which the fluids of the plurality of partial receiving spaces are moved. do.

Here, the partition wall is disposed along the axial direction, the inner case, the outer case and the partition wall may be configured to be extrusion molded.

The communicating of the partial accommodation space may include: cutting one end of both ends of the partition wall in a predetermined length along the axial direction, alternately cutting each other along the circumferential direction of the inner case to form a cutout; And providing a guide surface having both sides protruded into the fluid receiving space along the axial direction with respect to the cutout, the center of which is concave.

The providing of the guide surface may include forming a flow guide member formed of a nonmetal elastic member (synthetic resin member or rubber member) having the guide surface; And coupling the flow guide member to both ends of the inner case and the outer case.

The forming of the flow path guide member may include forming a flange part in contact with ends of the inner case and the outer case.

The step of coupling the flow guide member to both ends of the inner case and the outer case, may include the step of closely contacting the flange portion to the end of the inner case and the outer case.

As described above, according to an embodiment of the present invention, by placing the outer case to form a fluid receiving space on the outside of the inner case and partition the fluid receiving space into a plurality of partitions, the receiving space of the cooling fluid is expanded As a result, the heat exchange area of the cooling fluid is increased, and thus cooling performance can be improved.

In addition, since the cooling performance is improved, overheating of the stator and / or the rotor can be suppressed to maintain the stator and / or the rotor at an appropriate temperature, thereby increasing the power density of the motor.

In addition, since the fluid receiving space increases, the case size can be reduced by maintaining the same cooling performance, thereby enabling a compact configuration.

In addition, the inner case and the outer case are arranged concentrically and the partition wall is arranged in the axial direction by the extrusion molding can be facilitated manufacturing.

In addition, mass production can be performed by extrusion molding, and manufacturing cost can be significantly reduced.

In addition, it is easy to adjust the axial length by extrusion molding, so that the axial length is adjusted to correspond to the axial length of the stator and the rotor without making a separate mold, thereby making the case of the motor of various capacity (output) with the same mold. Can provide.

In addition, by cutting a portion of the partition wall to form a cut portion, and the both ends of the inner case and the outer case is provided with a flow guide member made of a non-metal elastic member, it is possible to reduce the weight of the entire case.

In addition, by forming a cutout at one end of both ends of the partition wall disposed along the circumferential direction, and the cutout is alternately arranged along the circumferential direction, the flow cross-sectional area of the cooling fluid is large, the flow path is long, the heat exchange area Can be significantly increased.

In addition, by providing a guide surface with both sides protruding toward the fluid receiving space and having a concave center in the center of the cutout portion, the flow resistance of the fluid can be reduced.

In addition, by providing the flow guide member with a flange portion which is in close contact with the ends of the inner case and the outer case, respectively, leakage of the cooling fluid can be suppressed.

1 is a perspective view of an electric motor according to an embodiment of the present invention,

2 is a cross-sectional view of the electric motor of FIG.

3 is a front view of the electric motor of FIG. 1;

4 is a side view of the electric motor of FIG. 1;

5 is an exploded perspective view of the case of the electric motor of FIG. 1, FIG.

6 is a front view of the case of FIG. 5;

7 is a cross-sectional view taken along the line VII-VII of FIG. 6;

8 is a view of FIG. 6

-

Section along the line,

9 is a perspective view of the flow guide member of FIG.

10 is a view for explaining the flow of the cooling fluid of the case of FIG.

Figure 11 is an enlarged view of the main portion of the fluid receiving space of the case according to another embodiment of the present invention,

Figure 12 is an enlarged view of the main portion of the fluid receiving space of the case according to another embodiment of the present invention,

13 is a cross-sectional view of a circular flow path guide member region of the case according to another embodiment of the present invention;

14 is a perspective view of the second circular euro guide member of FIG. 13;

15 is a front view of FIG. 14,

16 is a partial cutaway perspective view of a case for an electric motor according to still another embodiment of the present invention;

17 is a front view of a motor case according to another embodiment of the present invention;

18 is an exploded perspective view of a motor case according to another embodiment of the present invention;

19 is a cross-sectional view taken along the line VII-VII of FIG. 18.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

As shown in Figure 1 to 4, the electric motor according to an embodiment of the present invention, the stator 110; A rotor 130 disposed to be capable of relative movement with respect to the stator 110; And a case 210a for the electric motor in which the stator 110 is arranged to be in heat transfer contact therewith.

The stator 110 may include, for example, a stator core 112 and a stator coil 118 wound around the stator core 112.

The stator core 112 may be formed by, for example, laminating a plurality of electrical steel sheets having a plurality of slots 116.

The stator core 112 may have a cylindrical shape, for example.

The rotor accommodating space 114 may be formed in the center of the stator core 112 so that the rotor 130 may be rotatably accommodated.

The rotor 130 may include, for example, a rotor core 132 and a rotor coil 135 wound around the rotor core 132.

The rotation shaft 150 may be coupled to the rotor core 132.

For example, both ends of the rotation shaft 150 may be rotatably supported.

In the rotation shaft 150, for example, a bearing coupling part 152 may be formed to couple the bearing 160 to be described later.

For example, the rotation shaft 150 may have a through hole 154 formed in the center thereof in the axial direction.

For example, brackets 220 may be provided at both ends of the motor case 210a.

Each bracket 220 may be implemented, for example, in a disk shape.

As a result, both ends of the motor case 210a may be blocked.

In each of the brackets 220, for example, bearing accommodation parts 225 may be formed to accommodate the bearings 160 supporting the rotation shaft 150.

The bracket 220 may be fixed by, for example, a fastening member 230 disposed axially on an outer surface of the motor case 210a.

The fastening member 230, for example, the fixing bolt 232 and the fixing bolt having a length that can be coupled to each of the two brackets 220, respectively disposed on both sides of the motor case 210a. It may be configured with a nut 234 screwed to the (232).

In this embodiment, the fastening member 230 is a case where the fixing bolt 232 and the nut 234 is screwed to each other is illustrated, but this is only an example and a rod-shaped fastening member (not shown) and the rod It may be implemented as a stop ring (not shown) coupled to the fastening member of the shape.

More specifically, the outer surface of the motor case 210a, for example, the fastening member coupling portion 282 may be formed to be coupled to the fastening member 230.

The fastening member coupling part 282 may be formed to protrude from the outer surface of the motor case 210a and extend in the axial direction, for example.

Each fastening member coupling part 282 may be provided with a fastening member insertion hole 284 to be inserted into the fastening member 230 (more specifically, the fixing bolt 232).

On the other hand, the stator 110 may be coupled to the heat transfer to the inside of the motor case 210a according to an embodiment of the present invention.

The outer diameter surface of the stator 110, for example, may be coupled in close contact with the inner diameter surface of the motor case 210.

The stator 110 may be, for example, press-fitted into the motor case 210.

Motor case 210a of the present embodiment, for example, as shown in Figures 5 and 6, the inner case 250 to form a receiving space of the stator 110 and the rotor 130 therein; Outer case 280 is disposed on the outer side of the inner case 250 in a radial direction to form a fluid receiving space 260 is open at both sides to accommodate the fluid between the inner case 250 and the outer case 280 ); Between the inner case 250 and the outer case 280, one side is connected to the inner case 250 and the other side is connected to the outer case 280 and spaced apart along the circumferential direction of the inner case 250 A partition 270 partitioning the fluid receiving space 260 into a plurality of partial receiving spaces 262a to 262l; And a communication unit 310 blocking both sides of the fluid receiving space 260 and communicating the plurality of partial receiving spaces 262a to 262l to each other to form a cooling fluid flow path P through which the fluid is moved. It can be configured with.

The inner case 250 may be formed of, for example, a member having excellent thermal conductivity.

The inner case 250 may form an accommodation space of the stator 110 therein.

The inner case 250 may be configured, for example, in a cylindrical shape.

The inner case 250 may have, for example, a cylindrical shape in which both sides are open.

The inner surface of the inner case 250 may be in contact with the outer diameter surface of the stator core 112 so that heat transfer.

The inner case 250 may have an extended length compared to the axial length of the stator 110.

An outer case 280 may be provided at an outer side of the inner case 250 to be spaced apart along the radial direction of the inner case 250.

As a result, a fluid receiving space 260 may be formed between the inner case 250 and the outer case 280.

The outer case 280 may be arranged concentrically with the inner case 250, for example.

As a result, the fluid receiving space 260 is formed in a tubular shape (cylindrical shape) having an inner diameter corresponding to the outer diameter surface of the inner case 250 and an outer diameter corresponding to the inner diameter of the outer case 280. Can be.

The fluid receiving space 260 may have a tube shape in which both sides are open.

Between the inner case 250 and the outer case 280, one side is connected to the inner case 250 and the other side is connected to the outer case 280 and spaced apart in the circumferential direction to the fluid receiving space 260 A partition wall 270 may be provided to partition the plurality of partial accommodation spaces 262a to 262l.

The partition 270 may be configured in plural numbers.

For example, the partition 270 may be configured of twelve, that is, the first partition 272a to the twelfth partition 272l.

As a result, the fluid receiving space 260 may be divided into 12 and divided into first partial receiving spaces 262a to 12th partial receiving space 262l.

Each of the partial accommodation spaces 262a to 262l may have an arc cross section.

The partition 270 may be disposed to extend in the axial direction, for example.

As a result, the inner case 250, the outer case 280, and the partition wall 270 may be integrally formed by extruding.

In the present embodiment, the first partition 272a to the twelfth partition 272l is provided in the fluid receiving space 260 so that the fluid receiving space 260 is the first partial receiving space 262a to twelfth. Although the case formed with the partial accommodation space 262l is illustrated, this is only an example and the number of the partition walls 270 and the number of the partial accommodation spaces 262a to 262l may be appropriately adjusted.

Meanwhile, both sides of the inner case 250 and the outer case 280 block both sides of the fluid accommodating space 260 and the fluid moves by communicating with the plurality of partial accommodating spaces 262a-262l. Communication units 310 to form the cooling fluid flow path P may be provided.

For example, the communication part 310 may be inserted between the outer case 280 and the inner case 250 to prevent the leakage of the fluid, and also provide a flow guide member 320a for guiding the fluid. It may be provided with.

The communicating part 310 may be configured to include, for example, a cutout 275 cut along an axial direction at one end of both ends of each of the partition walls 270.

For example, the communication unit 310 may include a flow path blocking member 340 for blocking one end of at least one of the partial accommodation spaces 262a to 262l.

The cutouts 275 may be alternately formed, for example, on each partition 270 spaced apart along the circumferential direction of the inner case 250.

More specifically, when the cutout 275 is formed at one side of the partition 270, for example, one side (right side in the drawing) along the axial direction, the next partition 270 has the other side along the axial direction ( Cutouts 275 may be formed at respective ends of the left side of the drawing.

Meanwhile, a fluid inflow part 292 may be formed in the fluid accommodation space 260 to allow fluid to flow therein.

The fluid outlet part 294 may be formed in the fluid receiving space 260 to allow the fluid inside to flow out.

The fluid inlet portion 292 may be embodied as, for example, a fluid inlet tube protruding along the radial direction of the outer case 280 and bent in an axial direction.

The fluid outlet 294 may be implemented as, for example, a fluid outlet tube protruding along the radial direction of the outer case 280 and bent in an axial direction.

The fluid inlet part 292 and the fluid outlet part 294 may be provided, for example, in spaces partitioned from each other.

As a result, the fluid flowing into the fluid inlet 292 may be prevented from flowing out immediately through the fluid outlet 294 without undergoing a heat exchange process of moving along the cooling fluid flow path P and exchanging heat. have.

More specifically, for example, the fluid inlet part 292 and the fluid outlet part 294 may be partitioned from each other by the first partition 272a.

More specifically, for example, a cutout 275 may not be formed in the first partition 272a that divides the fluid inlet 292 and the fluid outlet 294.

The fluid inflow part 292 may be formed in any one of the spaces partitioned by the first partition 272a.

The fluid outlet 294 may be formed in another one of the spaces partitioned by the first partition 272a.

The fluid inlet 292 and the fluid outlet 294 may be located at the same end (for example, the left end in the drawing) along the axial direction.

As a result, the flow path of the cooling fluid is lengthened so that the heat exchange path between the cooling fluid and the inner case 250 and the outer case 280 can be extended (expanded).

The fluid inlet portion 292 may be provided in, for example, the first partial accommodating space 262a.

The fluid outlet 294 may be provided, for example, in the twelfth partial accommodating space 262l.

The flow path blocking member 340 may be provided in, for example, the first partial accommodating space 262a provided with the fluid inflow portion 292.

The flow path blocking member 340 may be provided, for example, in a twelfth partial accommodating space 262l provided with the fluid outlet 294.

On the other hand, the flow path blocking member 340, for example, may be formed of a non-metal elastic member.

As a result, the flow path blocking member 340 has improved adhesion to the inner case 250, the outer case 280, and the partition walls 270, thereby effectively suppressing leakage of the cooling fluid.

The flow path blocking member 340 may be formed of, for example, a silicone resin.

The flow path blocking member 340 may be formed of, for example, a rubber member.

For example, as illustrated in FIG. 7, the flow path blocking member 340 extends from an insertion portion 342 inserted into the partial accommodation spaces 262a through 262l and an end portion of the insertion portion 342. And an flange portion 344 contacting an end portion of the inner case 250 and an end portion of the outer case 280.

More specifically, each of the flow path blocking members 340 may have a length (circumferential length) that can be inserted between the partition walls 270 adjacent to each other.

The insertion portion 342 of each of the flow path blocking members 340 is, for example, the first partition 272a and the second partition 272b or the first partition 272a and the twelfth partition 272l. It may be configured to each have a length (circumferential length) that can be inserted therebetween.

In this embodiment, the case in which the flow path blocking member 340 is formed of two, but the first insertion portion (not shown) and the first insertion portion (not shown) inserted between the first partition 272a and the second partition 272b The second inserting portion (not shown) inserted between the first partition 272a and the twelfth partition 272l, and one flange portion (not shown) integrally formed around the first inserting portion and the second inserting portion It may be configured to have.

Meanwhile, a cutout 275 may be formed at one end of the second partition 272b spaced apart from the first partition 272a along the circumferential direction of the inner case 250.

The cutout 275 of the second partition 272b may be formed at, for example, an end (right end in the drawing) opposite the fluid inlet 292 along the axial direction.

Thereby, the flow path of the cooling fluid can be extended.

A cutout 275 may be formed in the third partition 272c spaced apart from the second partition 272b at a side opposite to the cutout 275 of the second partition 272b. .

In this manner, cutouts 275 are formed at the right ends of the fourth partition 272d, the sixth partition 272f, the eighth partition 272h, the tenth partition 272j, and the twelfth partition 272l, respectively. Can be formed.

A cutout 275 may be formed at the left end of each of the fifth partition 272e, the seventh partition 272g, the ninth partition 272i, and the eleventh partition 272k.

By such a configuration, the cooling fluid flow path P from the fluid inlet portion 292 to the fluid outlet portion 294 via the first partial accommodation spaces 262a to twelfth partial accommodation space 262l is obtained. By being formed, almost the entire circumferential surface of the inner case 250 may be in contact with the cooling fluid to maximize the cooling effect.

According to this configuration, the heat generated in the stator 110 and the rotor 130 in the case for the motor 210a is transferred to the inner case 250, the heat transferred to the inner case 250 Cooling inside the fluid receiving space 260 formed by the inner case 250, the outer case 280, and the partition 270 while being transmitted to the outer case 280 by conduction through the partition 270. Heat exchange with the fluid can be quickly discharged to the outside.

On the other hand, the flow guide member 320a, for example, as shown in Figures 8 and 9, the insertion portion inserted into the interior of the fluid receiving space 260 and the inner case 250 and the outer case ( It may be configured to have a flange portion in contact with each end of the 280.

The flow guide member 320a may be formed of, for example, a nonmetal elastic member.

As a result, the flow guide member 320a may elastically contact the inner case 250 and the outer case 280 to effectively prevent the leakage of the fluid.

In addition, the manufacturing of the flow path guide member 320a can be facilitated, and manufacturing cost can be reduced.

In addition, it is possible to suppress the increase in the overall weight of the motor after coupling.

More specifically, the flow path guide member 320a may be formed of a synthetic resin member (for example, silicone resin).

The flow guide member 320a may be formed of, for example, a rubber member.

The flow guide member 320a may be configured to block, for example, two ends of the partial accommodation space.

The flow guide member 320a may be implemented, for example, in an arc shape.

More specifically, the insertion portion of the flow guide member 320a, for example, may be configured to be inserted between the first partition 272a and the third partition 272c.

The flow guide member 320a may include, for example, a guide surface having both sides protruding into the fluid receiving space 260 along an axial direction with respect to the cutout 275 and having a concave center. have.

More specifically, the guide surface may be formed in the insertion portion.

As a result, the flow resistance of the fluid moved in the axial direction along each of the partial accommodating spaces can be reduced to smooth the direction change of the fluid.

The flange portion, for example, may be formed to extend in the width direction at the outer end of the insertion portion.

For example, the flange portion may be disposed between the end of the inner case 250 and the end of the outer case 280 and the bracket 220.

The inner surface of the flange portion may be pressed by the bracket 220 when the bracket 220 is coupled to be in close contact with the end of the inner case 250 and the end of the outer case 280.

As a result, leakage of the fluid in the fluid receiving space 260 may be suppressed.

By this configuration, the inner case 250, the outer case 280 and the partition 270 may be integrally formed by extrusion.

After the inner case 250, the outer case 280, and the partition wall 270 are integrally formed, a cutout 275 may be formed in each of the partition walls 270.

The outer case 280 may be provided with the fluid inlet 292 and the fluid outlet 294, respectively.

When the formation of the cutouts 275 on the partitions 270 is completed, the motor case 210a may be formed when the flow path blocking member 340 and the flow guide member 320a are respectively coupled to the corresponding positions.

On the other hand, when the formation of the motor case 210a is completed, the stator 110 may be inserted into the inner case 250.

The stator core 112 may be coupled to the outer diameter surface in close contact with the inner diameter surface of the inner case 250.

As a result, heat of the stator 110 may be quickly transferred to the inner case 250.

The rotor 130 may be inserted into the stator 110.

When the insertion of the rotor 130 is completed, the brackets 220 may be coupled to both ends of the motor case 210a, respectively.

The bracket 220 may be integrally fixed with the motor case 210a by the fastening member.

When the bracket 220 is fastened, the flow path blocking member 340 and the flow guide member 320a are brought into close contact with the ends of the motor case 210a by the inner surfaces of the bracket 220 to prevent leakage of the cooling fluid. Can be suppressed.

On the other hand, when the operation is started and the rotor 130 starts to rotate, the stator 110 and the rotor 130 may be raised in temperature.

When the operation is started, the cooling fluid may flow into the fluid receiving space 260.

Heat generated in the stator 110 and the rotor 130 may be transferred to the inner case 250.

Heat transferred to the inner case 250 may be quickly transferred to the partition 270 and the outer case 280 by conduction.

The inner case 250, the partition 270, and the outer case 280 may be cooled by heat exchange with a cooling fluid of the fluid receiving space 260.

More specifically, the fluid introduced into the first partial accommodating space 262a through the fluid inlet portion 292 moves to the right in the drawing along the axial direction through the cutout 275 of the second partition 272b. It may be moved to the second partial accommodating space 262b.

The fluid introduced into the second partial accommodating space 262b may move to the left side in the drawing along the axial direction and flow into the third partial accommodating space 262c through the cutout 275 of the third partition 272c. have.

The fluid introduced into the third partial accommodating space 262c is moved along the axial direction, and subsequently passes through the subsequent partial accommodating space through the cutting part 275, and then the cutting part 275 of the twelfth partition 272l is formed. It may be introduced into the twelfth partial receiving space (262l) through.

The fluid introduced into the twelfth partial accommodating space 262l may move to the left along the axial direction and then flow out of the fluid accommodating space 260 through the fluid outlet part 294.

The case 210a for the motor of the present embodiment is formed to have a longer length in the axial direction than the stator core 112, so that the heat directly contacted with the stator core 112 and transferred directly to the cooling fluid can be quickly obtained. By transferring, the stator core 112 may be quickly cooled.

In addition, the case 210a for the motor of the present embodiment includes a fluid receiving space 260 having an axial length longer than the axial length of the stator core 112, thereby providing the stator coil 118 and the rotor coil ( 135 may rapidly cool both side regions of the stator 110 having the temperature increased.

In addition, the motor case 210a of the present embodiment has a significantly larger contact area (heat exchange area) with the cooling fluid than the contact area between the stator core 112 and the inner case 250, whereby the stator core 112 can be cooled rapidly.

As a result, the stator core 112 and the stator coil 118 can maintain a relatively low temperature to increase the output density.

Hereinafter, another embodiment of the present invention will be described with reference to FIGS. 11 to 18.

The same and equivalent parts as those described above and shown in the drawings will be omitted for convenience of description of the drawings and will be described with reference to the same reference numerals.

In addition, overlapping detailed descriptions of some components may be omitted.

An uneven portion 350 may be formed in the fluid receiving space 260 of the motor case 210a according to another embodiment of the present invention to increase the surface area.

Since the uneven portion 350 has a shape extending in the axial direction, the uneven portion 350 may be integrally formed when the inner case 250, the outer case 280, and the partition wall 270 are formed. Do.

More specifically, for example, as shown in FIG. 11, the uneven portion 350 is recessed from at least one surface of the inner case 250, the outer case 280, and the partition wall 270 and is axially oriented. It may be configured with a groove portion 352 extended to.

In addition, as shown in FIG. 12, the uneven portion 350 protrudes from at least one surface of the inner case 250, the outer case 280, and the partition wall 270 and extends in an axial direction. 354 can be configured.

According to this configuration, the surface area in contact with the cooling fluid is increased, so that heat exchange can be rapid.

In addition, when the extrusion of the inner case 250, the outer case 280 and the partition wall 270 can be formed at the same time the uneven portion 350 can be easily manufactured.

On the other hand, the motor case 210a according to another embodiment of the present invention may be configured with a circular flow path guide member (320b).

The flow guide member 320b is, for example, as shown in FIGS. 13 to 15, and the first circular flow guide member 321a and the first circular flow guide member which are disposed opposite to the end portion of the fluid inflow portion 292. It may be configured to include a second circular flow guide member 321b coupled to the opposite side of the circular flow guide member 321a (the end of the fluid inlet 292 side).

The first circular flow guide member 321a may include, for example, an insertion part 322 inserted between the inner case 250 and the outer case 280, and an end portion and an outer case of the inner case 250. It may be configured with a flange portion 325 in contact with the end of the 280.

The flange portion 325 may have a circular ring shape (ring shape), for example.

The insertion part 322 may be formed to protrude on an inner surface of the flange part 325, for example.

The insertion part 322 may include, for example, a guide surface 323 in which both sides of the cutting part 275 are inserted into the fluid receiving space 260 and the center is inclined to be concave. Can be.

A partition insertion groove 327 may be formed between the inserting portion 322 and the inserting portion 322 to allow the partition wall 270 to be inserted therein.

The second circular flow guide member 321b may include, for example, an inserting portion 322 having a guide surface 323 inserted between the inner case 250 and the outer case 280 and guiding fluid, It is provided with a blocking portion 328 inserted between the inner case 250 and the outer case 280 and the flange portion 325 in contact with the end of the inner case 250 and the end of the outer case 280 Can be.

Here, the insertion portion 322 and the flange portion 325 of the second circular flow guide member 321b may be formed in the same manner as the first circular flow guide member 321a.

The blocking part 328 of the second circular flow guide member 321b may be formed to be inserted at a predetermined depth between the inner case 250 and the outer case 280, for example.

The blocking portion 328 of the second circular flow guide member 321b may be configured to have the same insertion depth (width), for example.

The blocking portion 328 of the second circular flow guide member 321b is, for example, between the first partition 272a and the second partition 272b and between the first partition 272a and the twelfth partition ( 272l) can be configured in two so that each can be inserted.

According to this configuration, when the cutouts 275 are formed in each partition wall 270 of the motor case 210a, the first circular flow guide member 321a is introduced into the fluid of the motor case 210a. The second circular flow guide member 321b may be coupled to an opposite end of the fluid inlet portion 292.

At this time, the first circular euro guide member 321a and the second circular euro guide member 321b are integrally formed to have a circular ring shape, so that the coupling operation with the motor case 210a can be facilitated. .

On the other hand, the motor case 210b according to another embodiment of the present invention, for example, as shown in Figure 16, the inner case for forming the receiving space of the stator 110 and the rotor 130 therein ( 250); An outer case 280 disposed on the outer side of the inner case 250 in a radial direction to form a fluid receiving space 260 which is open at both sides between the inner case 250; Between the inner case 250 and the outer case 280, one side is connected to the inner case 250 and the other side is connected to the outer case 280 and spaced apart along the circumferential direction of the inner case 250 Barrier ribs 358 for dividing the fluid receiving space 260 into a plurality of partial receiving spaces 262a to 262l; And a communication unit 310 blocking both sides of the fluid receiving space 260 and communicating the plurality of partial receiving spaces 262a to 262l to each other to form a cooling fluid flow path P through which the fluid is moved. It can be configured with.

The inner case 250 may have a cylindrical shape.

The outer case 280 may have a cylindrical shape and may be spaced apart along the radial direction so that the fluid receiving space 260 may be formed on the outer side of the inner case 250.

On the other hand, the partition wall 358 may be configured to have a curved cross-sectional shape with respect to the radial direction of the inner case 250.

As a result, a radial length (heat exchange area) of the partition wall 358 may be increased to promote heat exchange with the cooling fluid.

The partition wall 358 may be configured to have a curved cross-sectional shape with respect to the axial direction.

As a result, the axial length (heat exchange area) of the partition wall 358 may be increased to promote heat exchange with the cooling fluid.

For example, the partition wall 358 may be configured to have a curved cross-sectional shape with respect to the radial direction of the inner case 250 and a three-dimensional shape having a curved cross-sectional shape with respect to the axial direction.

As a result, the surface area of the partition wall 358 can be increased while maintaining the outer diameter of the outer case 280 to be the same size, thereby increasing the contact area (heat exchange amount) with the cooling fluid.

The inner case 250, the partition 358, and the outer case 280 may be integrally formed by a method such as powder metallurgy.

In addition, the inner case 250, the partition wall 358 and the outer case 280, for example, each may be formed to be integrally coupled to each other.

According to this configuration, the surface area of the partition wall 358 forming the partial receiving space (262a-262l) is increased to increase the heat exchange (heat exchange amount) with the cooling fluid to the stator 110 and the rotor 130 Cooling can be done more quickly.

On the other hand, the motor case 210a according to another embodiment of the present invention may be provided with a cooling fluid flow path (P) having a plurality of branch flow paths (P1, P2).

The plurality of branch passages P1 and P2 may be arranged in parallel with each other, for example.

For example, as illustrated in FIG. 17, the cooling fluid flow path P may include a first branch flow path P1 formed in one region of the motor case 210a and a second region formed in the other region. It may be configured with a branch passage (P2).

More specifically, for example, the first branch channel P1 may be formed in the right region of the drawing, and the second branch channel P2 may be formed in the left region of the drawing.

In the case for the motor of the present embodiment, the cutout portion 275 is not formed in the first partition 272a and the seventh partition 272g, so that the first branch channel P1 and the second branch channel P2 are separated from each other ( Compartments).

As a result, the flow rate (flow rate) of the cooling fluid supplied to the cooling fluid flow path P is increased, so that the inner case 250, the outer case 280, and the partition wall 270 can be cooled more quickly.

Accordingly, the temperature of the stator 110 and the rotor 130 may be further lowered to increase the output density.

Although the cooling fluid flow path P is exemplified in this embodiment having two branch flow paths P1 and P2, the number of branch flow paths may be appropriately adjusted in consideration of the calorific value (or cooling amount). .

The first branch flow path P1 may include, for example, a first fluid inflow part 361 through which the cooling fluid flows and a first fluid outflow part 362 through which the cooling fluid flows out. .

The second branch flow path P2 may include, for example, a second fluid inflow part 371 through which the cooling fluid flows and a second fluid outflow part 372 through which the cooling fluid flows out. .

For example, the first fluid inflow part 361 and the second fluid inflow part 371 may be provided below the motor case 210a in the drawing.

The first fluid outlet 362 and the second fluid outlet 372 may be provided, for example, on an upper side of the motor case 210a in the drawing.

With this configuration, when the operation is started, the cooling fluid can be simultaneously supplied to the first branch passage P1 and the second branch passage P2.

More specifically, when the cooling fluid flows into the first fluid inlet 361 and the second fluid inlet 371, respectively, each cooling fluid flows upward along the corresponding branch flow path (P1, P2), the case for the motor The 210a can be cooled more quickly.

As a result, the temperature of the stator 110 and the rotor 130 inside the motor case may be further lowered, thereby improving output density.

On the other hand, the case for the motor 210c according to another embodiment of the present invention, for example, as shown in Figure 18, the inner case forming a receiving space of the stator 110 and the rotor 130 therein ( 250); An outer case 280 disposed on the outer side of the inner case 250 in a radial direction to form a fluid receiving space 260 which is open at both sides between the inner case 250; Between the inner case 250 and the outer case 280, one side is connected to the inner case 250 and the other side is connected to the outer case 280 and spaced apart along the circumferential direction of the inner case 250 A partition 270 partitioning the fluid receiving space 260 into a plurality of partial receiving spaces 262a to 262l; And a communication unit 310 blocking both sides of the fluid receiving space 260 and communicating the plurality of partial receiving spaces 262a to 262l to each other to form a cooling fluid flow path P through which the fluid is moved. It can be configured with.

The partition 270 may be disposed along the axial direction, for example.

As a result, the inner case 250, the outer case 280, and the partition wall 270 may be integrally molded by extrusion.

The barrier rib 270 may include, for example, first barrier ribs 272a to twelfth barrier ribs 272l.

The first inlet space 262a may be provided with a fluid inlet 292.

A fluid outlet 294 may be formed in the twelfth partial accommodating space 262l.

The fluid inlet 292 and the fluid outlet 294 may be provided at one end (left side end in the drawing) of the outer case 280.

Brackets 220 may be provided at both ends of the inner case 250 and the outer case 280, respectively.

An inner surface of each bracket 220 may be provided with a communication unit 310 for communicating two adjacent accommodation spaces adjacent to each other.

The inner surface of each bracket 220 may be provided with a blocking portion 385 for blocking one end of the partial receiving space that is not in communication with the other partial receiving space.

More specifically, for example, as shown in FIG. 19, the blocking part 385 may include a first blocking part 386a that blocks an end portion of the first inlet space 262a of the fluid inlet part 292 side. It can be configured with.

In addition, the blocking part 385 may be configured to include, for example, a second blocking part 386b that blocks an end portion of the twelfth partial accommodating space 262l of the fluid outlet part 294 side. .

The first blocking portion 386a and the second blocking portion 386b may be, for example, an end portion of the fluid inlet portion 292 of the first partial receiving space 262a and the twelfth partial receiving space 262l. It may be configured to have a flat surface of a size that can respectively block the end portions of the fluid outlet (294) side.

The first blocking portion 386a and the second blocking portion 386b may be provided outside the ends of the first partial accommodating space 262a and the twelfth partial accommodating space 262l, for example, to prevent leakage of the cooling fluid. It may be provided with a sealing member 390 to suppress each.

The communicating portion 310 may include, for example, a first communication portion 381a and a second partial accommodation space 262b for communicating the first partial accommodation space 262a and the second partial accommodation space 262b. A second communication portion 381b for communicating the third partial accommodation space 262c, a third communication portion 381c for communicating the third partial accommodation space 262c and the fourth partial accommodation space 262d, and a fourth A fourth communication portion 381d communicating the partial accommodating space 262d and the fifth partial accommodating space 262e, and a fifth communicating part communicating the fifth partial accommodating space 262e and the sixth partial accommodating space 262f. 381e, the sixth communication portion 381f communicating the sixth partial accommodation space 262f and the seventh partial accommodation interval 262g, the seventh partial accommodation space 262g and the eighth partial accommodation space 262h. 7th communication part 381g which communicates, 8th partial accommodation space 262h, and 8th communication part 381h which communicates 9th partial accommodation space 262i, 9th partial accommodation space 262i, and 10th part The ninth communication portion 381i and the tenth partial accommodation space 262j communicating with the accommodation space 262j; And an eleventh communicating portion 381k communicating the eleventh partial accommodating space 262k and an eleventh communicating portion 381k communicating the eleventh partial accommodating space 262k and the twelfth accommodating space 262l. Can be.

In the present embodiment, the first communication part 381a, the third communication part 381c, the fifth communication part 381e, the seventh communication part 381g, the ninth communication part 381i, and the eleventh communication part. 381k may be formed on brackets 220 provided at opposite end portions of the fluid inflow portion 292, respectively.

In addition, the second communication part 381b, the fourth communication part 381d, the sixth communication part 381f, the eighth communication part 381h, and the tenth communication part 381j are the fluid inlet part 292. It may be formed on the inner surface of the bracket 220 provided at the side end, respectively.

For example, as illustrated in FIG. 19, the first communication parts 381a to 11th communication parts 381k include recesses 382 formed in the inner surface of the bracket 220 along the thickness direction. Each may be provided.

Sealing members 390 for suppressing leakage of the cooling fluid may be provided on the outer sides of the first communication parts 381a to eleventh communication parts 381k, respectively.

That is, each of the sealing members 390 of the first communication portion 381a to the eleventh communication portion 381k may be disposed along the outer edges of the recess 382.

By such a configuration, when the inner case 250, the outer case 280, and the partition wall 270 are integrally extruded, the bracket 220 is provided at both ends of the inner case 250 and the outer case 280. These can be combined respectively.

When the brackets 220 are coupled to each other, the first partial accommodating spaces 262a to twelfth partial accommodating spaces 262l are connected in series by the first communicating parts 381a to the eleventh communicating parts 381k. It may be connected in communication with each other to form one cooling fluid flow path (P).

Operation may be started to allow the cooling fluid to flow through the fluid inlet 292.

The cooling fluid introduced through the fluid inlet portion 292 is zigzag through the first partial receiving space 262a to the twelfth partial receiving space 262l with the inner case 250, the outer case 280, and the partition wall. 270 may be cooled.

The cooling fluid via the twelfth partial accommodating space 262l may flow out through the fluid outlet 294.

In the above, specific embodiments of the present invention have been shown and described. However, the present invention can be embodied in various forms without departing from the spirit or essential features thereof, so the embodiments described above should not be limited by the details of the detailed description.

In addition, even if the embodiment is not listed one by one in the detailed description described above should be construed broadly within the scope of the technical idea defined in the appended claims. In addition, all changes and modifications included within the technical scope of the claims and their equivalents should be covered by the appended claims.

Claims

An inner case forming an accommodating space of the stator and the rotor therein;

An outer case disposed on an outer side of the inner case in a radial direction to form a fluid receiving space in which both sides are open to accommodate the fluid between the inner case and the inner case;

A partition wall between the inner case and the outer case connected to the inner case and the other side connected to the outer case and spaced apart along the circumferential direction of the inner case to divide the fluid receiving space into a plurality of partial receiving spaces; And

And a communication unit which blocks both sides of the fluid receiving space and communicates the plurality of partial receiving spaces with each other to form a cooling fluid flow path through which the fluid is moved.
The method of claim 1,

The inner case and the outer case are arranged concentrically with each other,

The partition wall case for an electric motor, characterized in that arranged side by side along the axial direction.
The method of claim 2,

The communication unit has a part inserted between the outer case and the inner case to suppress the leakage of the fluid, and a case for an electric motor comprising a flow guide member for guiding the fluid.
The method of claim 3,

Cutouts cut along the axial direction are formed at one end of both ends of each partition wall,

The cutout case is an electric motor case, characterized in that formed alternately on each partition spaced apart along the circumferential direction of the inner case.
The method of claim 4, wherein

The flow guide member has a guide surface formed on both sides of the cutout portion protruding in the fluid receiving space along the axial direction, the guide surface formed in the center concave outward.
The method of claim 5,

The flow guide member is a case for an electric motor, characterized in that it comprises a flange portion in contact with the end of the inner case and the outer case.
The method of claim 6,

Further comprising a bracket provided at both ends of the inner case and the outer case,

The flange part is an electric motor case, characterized in that the bracket is in close contact with the end of the inner case and the end of the outer case.
The method of claim 7, wherein

The outer case is a case for an electric motor, characterized in that it comprises a fastening member coupling portion protruding radially on the outer surface and the fastening member is coupled to the inside.
The method of claim 3,

The flow path guide member has a circular arc shape, characterized in that the motor case.
The method of claim 3,

The flow path guide member is a case for an electric motor, characterized in that it has a circular shape.
The method of claim 1,

The case for an electric motor, characterized in that the concave-convex portion is formed to increase the surface area in the fluid receiving space.
The method of claim 1,

Brackets are provided at both ends of the inner case and the outer case, respectively.

The communication unit is a motor case, characterized in that formed on the inner surface of each bracket.
The method of claim 1,

The partition wall is characterized in that it has a curved cross-sectional shape along the radial direction.
The method of claim 1,

The partition wall has a motor having a curved cross-sectional shape along the axial direction.
The method according to any one of claims 1 to 14,

One side of the fluid receiving space is a fluid inlet for the fluid flow is formed, the other side of the fluid receiving space is a motor case, characterized in that the fluid outlet is formed to flow out the fluid inside.
The method of claim 15,

The case for the electric motor, characterized in that the fluid inlet portion and the fluid outlet portion is formed of a plurality.
Stator;

A rotor disposed in a relative motion relative to the stator; And

And a case for the electric motor of claim 1, wherein the stator is arranged to be in heat transfer contact therewith.
An inner case having an accommodation space formed therein, an outer case disposed spaced apart from each other in a radial direction on an outer side of the inner case to form a fluid receiving space having open sides between the inner case, the inner case and an outer case Between one side is connected to the inner case and the other side is connected to the outer case and spaced apart along the circumferential direction of the inner case integrally forming a partition for partitioning the fluid receiving space into a plurality of partial receiving space; And

And blocking both sides of the fluid receiving space and communicating the partial receiving space to form a cooling fluid flow path through which fluids of the plurality of partial receiving spaces are moved.
The method of claim 18,

The partition wall is disposed along the axial direction,

The inner case, the outer case and the partition wall manufacturing method for a motor case, characterized in that the extrusion molding.
The method of claim 18,

The communicating of the partial accommodation space may include: cutting one end of both ends of the partition wall in a predetermined length along the axial direction, alternately cutting each other along the circumferential direction of the inner case to form a cutout; And

Providing a guide surface on both sides protruding into the fluid receiving space along the axial direction with the center of the cut-out portion is formed concave in the center.
The method of claim 20, wherein providing the guide surface comprises:

Forming a flow path guide member formed of a non-metal elastic member with the guide surface; And

And coupling the flow path guide member to both ends of the inner case and the outer case.
The method of claim 21,

The forming of the flow path guide member may include forming a flange portion contacting an end of the inner case and an end of the outer case.

The step of coupling the flow guide member to both ends of the inner case and the outer case, the step of closely contacting the flange portion to the end of the inner case and the outer case; manufacturing method for a motor case comprising a.