CN112510909B - Motor rotor balance disc and motor - Google Patents
Motor rotor balance disc and motor Download PDFInfo
- Publication number
- CN112510909B CN112510909B CN202011364184.1A CN202011364184A CN112510909B CN 112510909 B CN112510909 B CN 112510909B CN 202011364184 A CN202011364184 A CN 202011364184A CN 112510909 B CN112510909 B CN 112510909B
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- rotor
- heat dissipation
- dissipation cavity
- hole
- lug
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/04—Balancing means
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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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The application discloses electric motor rotor balancing disk and motor, electric motor rotor balancing disk includes: the balancing chassis (1) is provided with an inner hole (11), and the edge of the balancing chassis (1) is provided with a plurality of lugs (12) which are uniformly arranged along the circumferential direction and have the same structure. This application sets up a plurality of radially arranged lugs along the circumferencial direction interval at the edge of balanced chassis, because the lug interval sets up, consequently can dodge rotor magnetic steel groove to this avoids the influence of balanced dish to the magnetic circuit. In addition, through the arrangement of the side notches, the heat dissipation cavity and the lug through holes, air or cooling oil flows out of the lug through holes to reach the rotor core through holes, and the cooling and heat dissipation effects on the rotor are improved. Finally, the circular ring is arranged, so that the area of an inner hole in interference fit with the rotating shaft is increased, and the fit interference force is increased, so that the balance disc meets the fit requirement in a high-speed state.
Description
Technical Field
The application relates to the technical field of automobile correlation, in particular to a motor rotor balancing disk and a motor.
Background
With the development of new energy automobile driving motors, the trend of high speed of the motors is more and more obvious. Because the rotating speed of the motor is continuously increased, the corresponding requirements on the dynamic balance of the motor rotor are also more severe. Rotor balance discs are also playing an increasingly important role as core components for achieving dynamic balance of the motor rotor.
The existing rotor balance disc is composed of only one disc 1 ' as shown in fig. 1, an inner hole 11 ' is installed in interference fit with a rotating shaft, and a heavy hole 12 ' is punched on the balance disc to realize dynamic balance of a motor rotor.
However, a magnetic steel slot is provided in the motor rotor. The existing rotor balance disc is a whole disc, so that the existing rotor balance disc is easily interfered with a magnetic steel slot.
Secondly, the interference of the existing rotor balance disc depends on the thickness of the disc, the area of the disc is small, and the small interference fit area is more and more difficult to meet the requirement of high rotation speed of the motor along with the increase of the rotation speed of the motor.
On the other hand, the improvement of the power density of the motor is not separated from the improvement of the heat dissipation level. The balance disc of the prior design is used as a rotating part of the motor, and the natural advantages of the rotating part in terms of heat dissipation are not exerted.
Disclosure of Invention
Therefore, it is necessary to provide a motor rotor balancing disk and a motor for solving the technical problem that the rotor balancing disk in the prior art is easy to interfere with the magnetic steel slot of the rotor.
The application provides a motor rotor balancing disk, includes: the balancing chassis is provided with an inner hole, and the edge of the balancing chassis is provided with a plurality of lugs which are uniformly arranged along the circumferential direction and have the same structure.
Further, the lug includes first surface, second surface and side surface, the first surface with the second surface is parallel, the side surface respectively with the first surface and the second surface is crossing, the side surface includes interconnect's first curved surface and second curved surface, the first surface is provided with the surface breach, the first curved surface is provided with the curved surface breach, the surface breach with the curved surface breach is connected and is formed the side breach.
Furthermore, the lug is provided with a heat dissipation cavity, the inlet of the heat dissipation cavity is the side notch, the outlet of the heat dissipation cavity is a lug through hole arranged on the second surface of the lug, and the upper surface of the heat dissipation cavity and the second surface of the lug are intersected at the edge of the lug through hole.
Still further, the heat dissipation cavity is a bucket-shaped heat dissipation cavity, and an inlet of the heat dissipation cavity is gradually narrowed toward the inside of the heat dissipation cavity.
Still further, an inclined plane is arranged in the heat dissipation cavity, and the inclined plane inclines from an inlet of the heat dissipation cavity to an outlet of the heat dissipation cavity.
Further, the side surface is equally divided into the first curved surface and the second curved surface.
Further, the projection of the surface gap on the second surface at least partially covers the bump through hole.
Still further, still include setting up the ring on balanced chassis, the ring internal surface is used for forming interference fit with the pivot, the height of ring is greater than balanced chassis.
The application provides a motor, including rotor and as before the electric motor rotor balance disc, the electric motor rotor balance disc suit is in the pivot of rotor, just the magnet steel trench of rotor is located the electric motor rotor balance disc the lug is in between the projection on the rotor.
Furthermore, a rotor core through hole extending in a direction parallel to the axis of the rotating shaft is formed in the rotor, and the distance from the center of the lug through hole to the center of the inner hole is consistent with the distance from the axis of the rotor core through hole to the axis of the rotating shaft.
This application sets up a plurality of radially arranged lugs along the circumferencial direction interval at the edge of balanced chassis, because the lug interval sets up, consequently can dodge rotor magnetic steel groove to this avoids the influence of balanced dish to the magnetic circuit. In addition, through the arrangement of the side notches, the heat dissipation cavity and the lug through holes, air or cooling oil flows out of the lug through holes to reach the rotor core through holes, and the cooling and heat dissipation effects on the rotor are improved. Finally, the circular ring is arranged, so that the area of an inner hole in interference fit with the rotating shaft is increased, and the fit interference force is increased, so that the balance disc meets the fit requirement in a high-speed state.
Drawings
FIG. 1 is a schematic structural diagram of a balancing disk of a motor rotor in the prior art;
fig. 2 is a schematic structural diagram of a balancing disk of a motor rotor according to an embodiment of the present application;
FIG. 3 is a front view of a balancing disk of a motor rotor according to an embodiment of the present application;
FIG. 4 is a rear view of a balancing disk of a motor rotor according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electric machine according to an embodiment of the present application;
fig. 6 is a cross-sectional view of an electric machine according to an embodiment of the present application.
Description of reference numerals:
1' -a disc; 11' -an inner bore; 12' -deduplication wells; 1-balancing the chassis; 11-inner bore; 12-a bump; 121-a first surface; 122-a second surface; 123-side surface; 1231-a first curved surface; 1232-a second curved surface; 124-bump vias; 125-lateral notch; 126-bevel; 13-a balance; 14-a circular ring; 2-a rotor; 21-a rotating shaft; 22-rotor core through hole.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 2, an embodiment of the present application relates to a balancing disk for a rotor of an electric machine, including: the balance chassis 1 is provided with an inner hole 11, and the outer edge of the balance chassis 1 is provided with a plurality of lugs 12 which are uniformly arranged along the circumferential direction and have the same structure.
Specifically, as shown in fig. 5, an inner hole 11 of a rotor balance disc is sleeved on a rotating shaft 21 of a rotor 2, the outer edge of a balance chassis 1 of the balance disc is provided with a plurality of protrusions 12 with the same structure, which are uniformly arranged along the circumferential direction, preferably, the outer contour of the balance chassis 1 is in a petal shape, each petal is one protrusion 12, the protrusions 12 are arranged at intervals, that is, concave features are formed between the petals, and the intervals between the protrusions 12, that is, the concave features, avoid a rotor magnetic steel groove, thereby avoiding the influence of the balance disc on a magnetic circuit. The balance chassis 1 is used for realizing dynamic balance of the rotor, and various existing dynamic balance modes can be adopted, for example, the balance chassis 1 can be provided with a balance piece 13 to realize the action of removing the weight and dynamically balancing the rotor. The balance chassis 1 is used for realizing dynamic balance of the rotor, and can adopt various existing dynamic balance modes, for example, a balance piece 13 can be arranged to realize the action of removing the weight and dynamically balancing the rotor. The balance member 13 may be a weight-removing hole or a balance weight. After the unbalance amount is obtained, the position of the counterweight hole or the balance block when the rotor is balanced is obtained through calculation, the counterweight hole is dug or the balance block is arranged at the position, and the rotor is accurately balanced.
This application sets up a plurality of radially arranged lugs along the circumferencial direction interval at the edge of balanced chassis, because the lug interval sets up, consequently can dodge rotor magnetic steel groove to this avoids the influence of balanced dish to the magnetic circuit.
As shown in fig. 2 to 4, an embodiment of the present application relates to a balancing disk for a rotor of an electric machine, including: the balance device comprises a balance chassis 1 with an inner hole 11 and a circular ring 14 arranged on the balance chassis 1, wherein the edge of the balance chassis 1 is provided with a plurality of lugs 12 which are uniformly arranged along the circumferential direction and have the same structure;
the bump 12 comprises a first surface 121, a second surface 122, and a side surface 123, wherein the first surface 121 is parallel to the second surface 122, the side surface 123 intersects the first surface 121 and the second surface 122, respectively, the side surface 123 comprises a first curved surface 1231 and a second curved surface 1232 which are connected with each other, the side surface 123 is divided into the first curved surface 1231 and the second curved surface 1232 on average, the first surface 121 is provided with a surface notch, the first curved surface 1231 is provided with a curved surface notch, the surface notch is connected with the curved surface notch to form a side notch 125, and a projection of the surface notch on the second surface 122 at least partially covers the bump through hole 124;
the bump 12 is provided with a heat dissipation cavity, an inlet of the heat dissipation cavity is the side notch 125, an outlet of the heat dissipation cavity is a bump through hole 124 arranged on the second surface of the bump 12, the upper surface of the heat dissipation cavity and the second surface of the bump 12 intersect at the edge of the bump through hole 124, the heat dissipation cavity is a bucket-shaped heat dissipation cavity, and the inlet of the heat dissipation cavity is gradually narrowed toward the inside of the heat dissipation cavity;
an inclined plane 126 is arranged in the heat dissipation cavity, and the inclined plane 126 inclines from the inlet of the heat dissipation cavity to the outlet of the heat dissipation cavity;
the inner surface of the circular ring is used for forming interference fit with the rotating shaft, and the height of the circular ring 14 is larger than that of the balance chassis 1.
Specifically, as shown in fig. 5, the inner hole 11 of the rotor balance disc is sleeved on the rotating shaft 21 of the rotor 2. The rotor balance disc of this embodiment sets up ring 14 and as the protruding characteristic of turn-ups, increases balance disc and 21 interference fit's of pivot hole area, increases cooperation interference power to make the balance disc satisfy the cooperation requirement under the high-speed state.
The side notches 125 and the bump through holes 124 of the present embodiment are respectively communicated with the heat dissipation cavity, so that air or cooling oil is collected into the heat dissipation cavity through the side notches 125 and flows out of the bump through holes 124 when the rotor rotates. As shown in fig. 6, air or cooling oil flows out from the bump through-holes 124 to reach the rotor core through-holes 22, such as rotor core ventilation holes or oil through-holes. Thereby realizing that air or cooling oil passes through the rotor core and realizes the cooling and radiating effect on the rotor 2.
The side notch 125 of the present embodiment is formed by connecting the surface notch of the first surface 121 and the curved notch of the first curved surface 1231. The first surface 121 may be an upper surface and the second surface 122 may be a lower surface. The side surface 123 includes a first curved surface 1231 and a second curved surface 1232, and the first curved surface 1231 and the second curved surface 1232 may be equally divided. The side notches of all the protrusions 12 are disposed on the first curved surface 1231 on the same side, so that the direction of air or cooling oil entering the heat dissipation cavity is consistent when the rotor rotates. The inlet end of the heat dissipation cavity is gradually narrowed to form a bucket-shaped characteristic, and the entering efficiency of air or cooling oil entering the heat dissipation cavity is improved. A slope 126 is provided in the heat dissipation cavity, and the slope 126 slopes from the inlet of the heat dissipation cavity to the outlet of the heat dissipation cavity, so that air or cooling oil is pressed into the bottom of the heat dissipation cavity and passes through the bump through-hole 124 to reach the rotor core through-hole 22, such as a rotor core vent hole or oil through hole. Thereby realizing that air or cooling oil passes through the rotor core and realizes the cooling and radiating effect on the rotor 2.
This embodiment is through setting up side breach, heat dissipation cavity and lug through-hole for air or cooling oil flow out from the lug through-hole and reach the rotor core through-hole, improve the cooling heat dissipation effect to the rotor. Secondly, set up the inclined plane in the heat dissipation cavity and set up the surperficial breach of fill type, improve the entering efficiency of the air or the cooling oil that get into the heat dissipation cavity. Finally, the circular ring is arranged, so that the area of an inner hole in interference fit with the rotating shaft is increased, and the fit interference force is increased, so that the balance disc meets the fit requirement in a high-speed state.
As shown in fig. 1 to 5, an electric machine according to an embodiment of the present application includes a rotor 2 and a balance disc of the electric machine rotor;
the motor rotor balance disc comprises: the balance chassis 1 is provided with an inner hole 11, and the outer edge of the balance chassis 1 is provided with a plurality of lugs 12 which are uniformly arranged along the circumferential direction and have the same structure;
the inner hole 11 of the motor rotor balance disc is sleeved on the rotating shaft 21 of the rotor 2, and the magnetic steel groove of the rotor 2 is positioned between the projections of the lug 12 of the motor rotor balance disc on the rotor 2.
Specifically, as shown in fig. 5, an inner hole 11 of a rotor balance disc is sleeved on a rotating shaft 21 of a rotor 2, a plurality of radially arranged protrusions 12 are arranged at the edge of a balance chassis 1 of the balance disc, preferably, the outer contour of the balance chassis 1 is in a petal shape, each petal is one protrusion 12, the protrusions 12 are arranged at intervals, that is, concave features are formed between the petals, and the intervals between the protrusions 12, that is, the concave features, avoid a rotor magnetic steel groove, thereby avoiding the influence of the balance disc on a magnetic circuit.
The balance chassis 1 is used for realizing dynamic balance of the rotor, and various existing dynamic balance modes can be adopted, for example, the balance chassis 1 can be provided with a balance piece 13 to realize the action of removing the weight and dynamically balancing the rotor. The balance member 13 may be a weight-removing hole or a balance weight. After the unbalance amount is obtained, the position of the counterweight hole or the balance block when the rotor is balanced is obtained through calculation, the counterweight hole is dug or the balance block is arranged at the position, and the rotor is accurately balanced.
The rotor 2 and the balancing disk of the electric machine form an electric machine rotor connection, of which only the electric machine rotor connection is shown in fig. 5. The rest of the machine, such as the stator, etc., can be implemented using known techniques.
This application sets up a plurality of radially arranged lugs along the circumferencial direction interval at the edge of balanced chassis, because the lug interval sets up, consequently can dodge rotor magnetic steel groove to this avoids the influence of balanced dish to the magnetic circuit.
The design of the driving motor rotor balance disc improves the problem that the interference force of the existing driving motor rotor balance disc is not enough under a high-speed state, and realizes the functions of ventilation or oil-through heat dissipation. The development requirements of high speed and high power density of the current driving motor are well met, and the driving motor can be applied to the driving motors with two cooling modes of water cooling and oil cooling.
As shown in fig. 1 to 6, an electric machine according to an embodiment of the present application includes a rotor 2 and a balance disc of the electric machine rotor;
the motor rotor balance disc comprises: the balance device comprises a balance chassis 1 with an inner hole 11 and a circular ring 14 arranged on the balance chassis 1, wherein the edge of the balance chassis 1 is provided with a plurality of lugs 12 which are uniformly arranged along the circumferential direction and have the same structure;
the bump 12 comprises a first surface 121, a second surface 122, and a side surface 123, wherein the first surface 121 is parallel to the second surface 122, the side surface 123 intersects the first surface 121 and the second surface 122, respectively, the side surface 123 comprises a first curved surface 1231 and a second curved surface 1232 which are connected with each other, the side surface 123 is divided into the first curved surface 1231 and the second curved surface 1232 on average, the first surface 121 is provided with a surface notch, the first curved surface 1231 is provided with a curved surface notch, the surface notch is connected with the curved surface notch to form a side notch 125, and a projection of the surface notch on the second surface 122 at least partially covers the bump through hole 124;
the bump 12 is provided with a heat dissipation cavity, an inlet of the heat dissipation cavity is the side notch 125, an outlet of the heat dissipation cavity is a bump through hole 124 arranged on the second surface of the bump 12, the upper surface of the heat dissipation cavity and the second surface of the bump 12 intersect at the edge of the bump through hole 124, the heat dissipation cavity is a bucket-shaped heat dissipation cavity, and the inlet of the heat dissipation cavity is gradually narrowed toward the inside of the heat dissipation cavity;
an inclined plane 126 is arranged in the heat dissipation cavity, and the inclined plane 126 inclines from the inlet of the heat dissipation cavity to the outlet of the heat dissipation cavity;
the inner surface of the circular ring is used for forming interference fit with the rotating shaft, and the height of the circular ring 14 is greater than that of the balance chassis 1;
the inner hole 11 of the motor rotor balance disc is sleeved on the rotating shaft 21 of the rotor 2, and the magnetic steel groove of the rotor 2 is positioned between the projections of the convex block 12 of the motor rotor balance disc on the rotor 2;
the rotor 2 is provided with a rotor core through hole 22 extending in parallel to the axial direction of the rotating shaft 21, and the distance from the center of the through hole 124 of the projection 12 to the center of the inner hole 11 is consistent with the distance from the axis of the through hole 22 of the rotor core to the axis of the rotating shaft 21.
Specifically, the fact that the distances are consistent means that the deviation between the distance from the center of the through hole 124 of the projection 12 to the center of the inner hole 11 and the distance from the axis of the through hole 22 of the rotor core to the axis of the rotating shaft 21 is within a preset allowable error range. The distance from the center of the through hole 124 of the projection 12 to the center of the inner hole 11 is the same as the distance from the axis of the rotor core through hole 22 to the axis of the rotating shaft 21, so that the through hole 124 can be aligned with the rotor core through hole 22 when the rotor 2 rotates.
This embodiment is through setting up side breach, heat dissipation cavity and lug through-hole for air or cooling oil flow out from the lug through-hole and reach the rotor core through-hole, improve the cooling heat dissipation effect to the rotor.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. An electric machine rotor balancing disk, comprising: the balance chassis (1) is provided with an inner hole (11), and the outer edge of the balance chassis (1) is provided with a plurality of lugs (12) which are uniformly arranged along the circumferential direction and have the same structure;
the bump (12) comprises a first surface (121), a second surface (122) and a side surface (123), the first surface (121) is parallel to the second surface (122), the side surface (123) is respectively intersected with the first surface (121) and the second surface (122), the side surface (123) comprises a first curved surface (1231) and a second curved surface (1232) which are connected with each other, the first surface (121) is provided with a surface notch, the first curved surface (1231) is provided with a curved surface notch, and the surface notch is connected with the curved surface notch to form a side notch (125);
the lug (12) is provided with a heat dissipation cavity, the inlet of the heat dissipation cavity is the side notch (125), the outlet of the heat dissipation cavity is a lug through hole (124) formed in the second surface of the lug (12), and the upper surface of the heat dissipation cavity and the second surface of the lug (12) are intersected at the edge of the lug through hole (124).
2. The electric machine rotor balancing disk of claim 1, wherein the heat dissipation cavity is a bucket-shaped heat dissipation cavity, and an inlet of the heat dissipation cavity is gradually narrowed toward an inside of the heat dissipation cavity.
3. The electric machine rotor balancing disc of claim 1, wherein a chamfer (126) is provided in the heat dissipation cavity, the chamfer (126) sloping from an inlet of the heat dissipation cavity to an outlet of the heat dissipation cavity.
4. The electric machine rotor balancing disc of claim 1, characterized in that the side surface (123) is equally divided into the first curved surface (1231) and the second curved surface (1232).
5. The electric machine rotor balancing disc of claim 1, characterized in, that the projection of the surface indentation onto the second surface (122) at least partially covers the tab through hole (124).
6. An electric machine rotor balancing disk according to any one of claims 1 to 5, characterized in that it further comprises a circular ring (14) arranged on the balancing chassis (1), the inner surface of the circular ring is used for forming an interference fit with a rotating shaft, and the height of the circular ring (14) is greater than the height of the balancing chassis (1).
7. An electric machine, characterized in that it comprises a rotor (2) and a balancing disk of an electric machine rotor according to any one of claims 1 to 6, which is mounted on the rotation axis (21) of the rotor (2) in a sleeved manner, and in that the magnetic steel slots of the rotor (2) are located between the projections of the projections (12) of the balancing disk of an electric machine rotor on the rotor (2).
8. The motor according to claim 7, characterized in that the rotor (2) is provided with a rotor core through hole (22) extending parallel to the axial direction of the rotating shaft (21), and the distance from the center of the through hole (124) of the projection (12) to the center of the inner hole (11) is the same as the distance from the axis of the through hole (22) to the axis of the rotating shaft (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364184.1A CN112510909B (en) | 2020-11-27 | 2020-11-27 | Motor rotor balance disc and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364184.1A CN112510909B (en) | 2020-11-27 | 2020-11-27 | Motor rotor balance disc and motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112510909A CN112510909A (en) | 2021-03-16 |
| CN112510909B true CN112510909B (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011364184.1A Active CN112510909B (en) | 2020-11-27 | 2020-11-27 | Motor rotor balance disc and motor |
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| Country | Link |
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| CN (1) | CN112510909B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113489232A (en) * | 2021-07-29 | 2021-10-08 | 中国科学院工程热物理研究所 | Flywheel structure and flywheel energy storage system |
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| CN204465198U (en) * | 2015-04-02 | 2015-07-08 | 台州宝达机电有限公司 | The rotor sheet that coil inlay card is stable |
| CN104963827A (en) * | 2015-07-23 | 2015-10-07 | 珠海凌达压缩机有限公司 | Counter balance, compressor having same and electric appliance having same |
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| CN112510909A (en) | 2021-03-16 |
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