CN220510839U - Rotor structure and motor - Google Patents

Abstract

The utility model relates to the technical field of motors, and particularly discloses a rotor structure and a motor, wherein the rotor structure comprises a rotor iron core, a plurality of V-shaped mounting grooves are formed in the rotor iron core along the circumferential direction, a layout area is formed between the V-shaped mounting grooves and the outer edge of the rotor iron core, and a magnetism isolating hole is formed in the layout area; two ends of the V-shaped mounting groove are respectively provided with a magnetism isolating bridge, the V-shaped mounting groove comprises two symmetrically distributed side grooves, and permanent magnets are arranged in the side grooves; a trimming edge is formed at the outer edge of the rotor core corresponding to the two magnetic isolation bridges which are adjacent to each other between the two V-shaped mounting grooves; according to the utility model, through the structural design that the outer edges of the rotor iron cores corresponding to the two magnetic isolation bridges are formed with the trimming edges, the cogging torque can be effectively reduced, so that the noise generated during the operation of the motor is reduced, and the operation efficiency of the motor is improved.

Description

Rotor structure and motor

Technical Field

The present disclosure relates to motors, and particularly to a rotor structure and a motor.

Background

The vertical rotary compressor is a compressor which compresses and conveys gas by changing working volume through the rotary motion of a rotor in a cylinder, wherein a rotating shaft in the compressor is driven by a motor, and a roller is driven by an eccentric part to compress refrigerant gas.

In practical application, the cogging torque of the motor can influence the operation efficiency of the motor, so that the performance of the compressor is influenced, the existing motor is of various different types, the 6-pole 9-slot direct winding motor is common, the problems of large electromagnetic sound and small high-efficiency rotating speed range are frequently accompanied, the compressor is larger in noise, and the motor efficiency is not high enough in the normal rotating speed range.

Disclosure of Invention

Aiming at the problems of large electromagnetic sound, small high-efficiency rotating speed range and low operation efficiency of the motor, the utility model provides a rotor structure and the motor, and the design of forming trimming edges on the outer edges of rotor iron cores corresponding to two magnetic isolation bridges which are close to each other can effectively reduce cogging torque, thereby reducing noise during motor operation and improving the operation efficiency of the motor.

In order to solve the technical problems, the utility model provides the following specific scheme:

the rotor structure comprises a rotor core, wherein a plurality of V-shaped mounting grooves are formed in the rotor core along the circumferential direction, a layout area is formed between the V-shaped mounting grooves and the outer edge of the rotor core, and a plurality of magnetism isolating holes are formed in the layout area;

two ends of the V-shaped mounting groove are respectively provided with a magnetism isolating bridge, the V-shaped mounting groove comprises two symmetrically distributed side grooves, and permanent magnets are arranged in the side grooves;

and a trimming edge is formed at the outer edge of the rotor core corresponding to the two magnetic isolation bridges which are adjacent to each other between the two V-shaped mounting grooves.

In some embodiments, let the length of the trimming be L, let the length of the permanent magnet be W, L and W satisfy 0.68×w < =l < =0.90×w, adjust the size ratio of the length of the trimming to the length of the permanent magnet, and more effectively reduce the cogging torque, thereby reducing the noise of the motor and improving the working efficiency of the motor.

In some embodiments, let the length of the trimming be L, let the polar arc of the rotor core be T, L and T satisfy 0.31×t < =l < =0.50×t, and the size ratio of the length of the trimming to the polar arc of the rotor core is adjusted, so that the waveform distortion rate and the cogging torque can be effectively reduced.

In some embodiments, the number of the magnetism isolating holes is two, the two magnetism isolating holes are respectively located at two sides of a symmetry axis of the layout area, and the magnetism isolating holes can reduce waveform distortion rate and noise during motor operation.

In some embodiments, the number of the magnetism isolating holes is four, and the four magnetism isolating holes are located on two sides of the symmetry axis of the layout area;

the two magnetism isolating holes positioned on the same side of the symmetry axis of the layout area are different in form, and the number, the form and the distribution positions of the magnetism isolating holes are adjusted, so that the waveform distortion rate can be further reduced, and the noise during motor operation is reduced.

In some embodiments, the included angle between the two permanent magnets in the V-shaped mounting groove is 115-135 degrees, and the included angle is matched with the magnetism isolating hole, so that the waveform distortion rate can be reduced, the magnetic flux of the permanent magnets is fully utilized, and the utilization rate of the permanent magnets is improved.

In some embodiments, the edge of the side groove is inwards formed with a positioning protrusion for positioning the permanent magnet, so that the installation position of the permanent magnet in the side groove is positioned, and the efficiency in assembly and the stability in use are improved.

In some embodiments, a plurality of refrigerant channel holes which are uniformly distributed along the circumferential direction are formed in the rotor core near the axial center position of the rotor core, so that the flow of the refrigerant is realized, and the rotor core is uniformly cooled.

In some embodiments, the refrigerant passage holes are in a waist-shaped structure, the number of the refrigerant passage holes is 4-8, and the form and the number of the refrigerant passage holes are adjusted, so that the uniform cooling effect on the rotor core and the oil return effect of lubricating oil can be further optimized.

The present application also provides a motor comprising a stator and a rotor structure as described in any one of the above;

the stator and the rotor core are coaxially arranged, and the stator is positioned at the outer side of the rotor core;

the outer diameter of the stator is 70-105mm, and the outer diameter size of the stator is determined according to the use requirement and the power requirement of the motor to ensure the use performance and the use effect of the motor.

According to the rotor structure, the edge cutting structure is designed on the outer edge of the rotor core corresponding to the two magnetic isolation bridges which are close to each other, so that the cogging torque can be effectively reduced, the noise during motor operation is reduced, and the motor operation efficiency is improved.

Drawings

FIG. 1 is a schematic view of a rotor structure according to an embodiment of the present utility model;

FIG. 2 is a graph showing a cogging torque variation trend corresponding to the ratio of L to W provided in the embodiment of the present utility model;

FIG. 3 is a graph showing a cogging torque trend corresponding to the ratio of L to T provided in the embodiment of the present utility model;

FIG. 4 is a schematic diagram of a motor according to an embodiment of the present utility model;

1-a rotor core;

a 2-V-shaped mounting groove;

3-layout areas;

4-magnetism isolating holes; 4 a-a first magnetism isolating hole; 4 b-a second magnetism isolating hole;

5-magnetism isolating bridge;

6-permanent magnets;

7-trimming;

8-positioning protrusions;

9-refrigerant passage holes;

10-stator.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The described embodiments are some, but not all, embodiments of the utility model.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

For example, a rotor structure comprises a rotor core, wherein a plurality of V-shaped mounting grooves are formed in the rotor core along the circumferential direction, a layout area is formed between the V-shaped mounting grooves and the outer edge of the rotor core, and a magnetism isolating hole is formed in the layout area; two ends of the V-shaped mounting groove are respectively provided with a magnetism isolating bridge, the V-shaped mounting groove comprises two symmetrically distributed side grooves, and permanent magnets are arranged in the side grooves; and a trimming edge is formed at the outer edge of the rotor core corresponding to the two magnetic isolation bridges which are adjacent to each other between the two V-shaped mounting grooves.

According to the rotor structure provided by the embodiment, through the structural design that the outer edges of the rotor iron cores corresponding to the two magnetic isolation bridges which are close to each other form the trimming edge, the cogging torque can be effectively reduced, so that the noise generated during the operation of the motor is reduced, and the operation efficiency of the motor is improved.

Embodiment one:

as shown in fig. 1, a rotor structure includes a rotor core 1, a plurality of V-shaped mounting grooves 2 uniformly distributed in a circumferential direction of the rotor core 1 are provided, gaps are provided between adjacent V-shaped mounting grooves 2, the V-shaped mounting grooves 2 are used for mounting permanent magnets 6, a layout area 3 is formed between the V-shaped mounting grooves 2 and an outer edge of the rotor core 1, and a plurality of magnetism isolating holes 4 are provided in the layout area 3.

The arrangement region 3 includes a region between the V-shaped mounting groove 2 and the outer edge of the rotor core 1, which means herein that a region between a single V-shaped mounting groove 2 and the outer edge of the rotor core 1, that is, a region between one V-shaped mounting groove 2 and the corresponding outer edge of the rotor core 1 forms one arrangement region 3, and therefore, it can be understood that a plurality of arrangement regions 3 are formed in a region between the outer edges of the rotor core 1 corresponding to a plurality of V-shaped mounting grooves 2, and the number of arrangement regions 3 is the same as the number of V-shaped mounting grooves 2. The arrangement area 3 formed at the V-shaped edge of the V-shaped mounting groove 2 and the arc-shaped outer edge of the rotor core 1 is a sector area, and the symmetry axis of the sector area and the symmetry axis of the V-shaped mounting groove 2 are the same symmetry axis.

A plurality of magnetism isolating holes 4 are formed in the layout area 3, and the magnetism isolating holes 4 are used for shunting magnetic flux so as to avoid waveform distortion of back electromotive force caused by too concentrated magnetic flux and further improve the utilization rate of the permanent magnet 6.

The two ends of the V-shaped mounting groove 2 are respectively provided with the magnetism isolating bridge 5, the principle of the magnetism isolating bridge 5 is that the magnetism flux reaches saturation at the magnetism isolating bridge part to play a role in limiting magnetic leakage, the magnetism isolating bridge 5 is arranged, the too low utilization rate of the permanent magnet 6 caused by the too large magnetism leakage coefficient can be avoided, the utilization rate of the permanent magnet 6 is further improved, and a gap is reserved between the two magnetism isolating bridges 5 which are adjacent to each other between the two adjacent V-shaped mounting grooves 2.

The V-shaped mounting groove 2 comprises two symmetrically distributed side grooves, permanent magnets 6 are mounted in the side grooves, and a tangential edge 7 is formed at the outer edge of the rotor core 1 corresponding to two magnetism isolating bridges 5 which are mutually close to each other between two adjacent V-shaped mounting grooves 2.

The verification shows that when the outer edge of the rotor core 1 is a complete arc, the cogging torque is 0.107, and the waveform distortion rate is 7.16%; by adopting the structural design mode that the trimming 7 is formed at the outer edge of the rotor core 1 corresponding to the two magnetic isolation bridges 5 which are close to each other in the example, when the trimming 7 exists at the outer edge of the rotor core 1, and the trimming 7 is 6.8mm, the cogging torque is 0.089, the waveform distortion rate is 6.91%, and the improvement ratio of the cogging torque to the rotor structure in the example reaches 16.8% and the improvement ratio of the waveform distortion rate to the rotor structure reaches 3.5% through calculation.

According to the rotor structure provided in the example, through the structural design that the trimming edges 7 are formed at the outer edges of the rotor core 1 corresponding to the two magnetic isolation bridges 5 which are close to each other, the trimming edges 7 and the polar arcs exist at the outer edges of the rotor core 1 at the same time, and the size ratio between the length of the trimming edges 7 and the polar arcs of the rotor core 1 is adjusted, so that the cogging torque can be effectively reduced, the noise during motor operation is reduced, and the motor operation efficiency is improved.

Embodiment two:

referring to fig. 1 to 3, let the length of the trim 7 be L, let the length of the permanent magnet 6 be W, and let the length L of the trim 7 and the length W of the permanent magnet 6 satisfy 0.68×w < =l < =0.90×w, and by adjusting the size ratio of the length of the trim 7 to the length of the permanent magnet 6, the cogging torque is reduced more effectively, thereby reducing the noise of the motor and improving the working efficiency of the motor.

In one example, the dimension ratio between the length L of the cut edge 7 and the length W of the permanent magnet 6 is 0.84, the cogging torque is 0.089, the waveform distortion rate is 3.5%, and the following table is a comparison table of the ratios before L and X, T.

Embodiment III:

referring to fig. 1 to 3, in this example, let the length of the trimming 7 be L, let the pole arc of the rotor core 1 be T, and let the length L of the trimming 7 and the pole arc T of the rotor core 1 satisfy 0.31×t < =l < =0.50×t, by adjusting the size ratio of the length of the trimming 7 and the pole arc of the rotor core 1, the waveform distortion rate and the cogging torque can be effectively reduced.

In one example, the dimension ratio between the length L of the cut edge 7 and the pole arc T of the rotor core 1 is 0.48, the cogging torque is 0.089, the waveform distortion rate reaches 3.5%, and the numerical comparison can be referred to the comparison table of the ratio before L and X, T in the second embodiment.

Embodiment four:

referring to fig. 1, in this example, the number of the magnetism isolating holes is two, the two magnetism isolating holes are respectively located at two sides of the symmetry axis of the layout area 3, the magnetism isolating holes can reduce waveform distortion rate and noise when the motor works, the two magnetism isolating holes are symmetrically distributed at two sides of the symmetry axis of the layout area 3, and the shapes of the two magnetism isolating holes can be the same or different.

In another example, the number of the magnetism isolating holes 4 is four, the four magnetism isolating holes 4 are located on two sides of the symmetry axis of the layout area 3 in pairs, that is, two magnetism isolating holes 4 are located on one side of the symmetry axis of the layout area 3, two magnetism isolating holes 4 are also located on the other side of the symmetry axis of the layout area 3, and each two magnetism isolating holes 4 located on two sides of the symmetry axis of the layout area 3 can be in symmetrical relation with the opposite magnetism isolating holes 4.

The two magnetic isolation holes on the same side of the symmetry axis of the layout area 3 are different in form, for example, the four magnetic isolation holes comprise two first magnetic isolation holes 4a and two second magnetic isolation holes 4b, wherein each first magnetic isolation hole 4a and each second magnetic isolation hole 4b are positioned on the same side of the symmetry axis of the layout area 3, the other first magnetic isolation hole 4a and the other second magnetic isolation hole 4b are positioned on the other side of the symmetry axis of the layout area 3, the forms of the first magnetic isolation holes 4a and the second magnetic isolation holes 4b are different, and waveform distortion rate can be further reduced by adjusting the number, the form and the distribution position of the magnetic isolation holes, and noise during motor operation is reduced.

It should be noted that, in this example, the specific number, shape and distribution position of the magnetic isolation holes are not limited, and the number of the magnetic isolation holes listed in the above two examples is one example in practical application, so according to different application requirements, the number, shape and distribution position of the magnetic isolation holes can be adjusted accordingly, so as to ensure the use performance and the use effect.

Fifth embodiment:

the included angle between the two permanent magnets 6 in the V-shaped mounting groove 2 is 115-135 degrees, and the included angle is matched with the magnetism isolating hole, so that the waveform distortion rate can be reduced, the magnetic flux of the permanent magnets is fully utilized, and the utilization rate of the permanent magnets is improved.

Referring to fig. 1, the v-shaped mounting groove 2 includes two symmetrically distributed side grooves, and the two permanent magnets 6 include a first permanent magnet 6 and a second permanent magnet 6, the first permanent magnet 6 and the second permanent magnet 6 being respectively located in the two side grooves, an angle between a long side of the first permanent magnet 6 near an outer edge portion of the rotor core 1 and a long side of the second permanent magnet 6 near the outer edge portion of the rotor core 1 being 115 to 135 °, for example, in one example, 133 °.

A positioning protrusion 8 for positioning the permanent magnet 6 is formed inwards at the edge of the side groove, the positioning protrusion 8 and one end of the permanent magnet 6 are in abutting relation, the permanent magnet 6 is positioned at the installation position in the side groove through the positioning protrusion 8, and the efficiency in assembly and the stability in use are improved.

A plurality of refrigerant passage holes 9 which are uniformly distributed along the circumferential direction are formed in the rotor core 1 at positions close to the axis of the rotor core, and the refrigerant passage holes 9 can realize the flow of refrigerant and the uniform cooling of the rotor core 1.

The refrigerant passage holes 9 are of a waist-shaped structure, the number of the refrigerant passage holes is 4-8, the shape and the number of the refrigerant passage holes 9 are adjusted, and the uniform cooling effect on the rotor core 1 and the oil return effect of lubricating oil can be further optimized.

In one example, the number of the refrigerant passage holes 9 is 6, and the 6 refrigerant passage holes 9 are uniformly distributed in the circumferential direction.

Example six:

referring to fig. 4, the present application further provides a motor, including a stator 10 and the rotor structure mentioned in any one of the above embodiments, where the rotor structure includes a rotor core 1, a plurality of V-shaped mounting slots 2 are formed in the rotor core 1 along a circumferential direction, a layout area 3 is formed between the V-shaped mounting slots 2 and an outer edge of the rotor core 1, and magnetism isolating holes are formed in the layout area 3; the two ends of the V-shaped mounting groove 2 are respectively provided with a magnetism isolating bridge 5, the V-shaped mounting groove 2 comprises two symmetrically distributed side grooves, and permanent magnets 6 are arranged in the side grooves; a tangential edge 7 is formed at the outer edge of the rotor core 1 corresponding to the two magnetic isolation bridges 5 which are adjacent to each other between the two adjacent V-shaped mounting grooves 2.

The stator 10 and the rotor core 1 are coaxially arranged, and the stator 10 is positioned outside the rotor core 1; the outer diameter of the stator 10 is 70-105mm, and the outer diameter size of the stator 10 is determined according to the use requirement and power requirement of the applied motor to ensure the use performance and use effect of the motor.

In one example, the outer diameter of the stator 10 is 90mm, and as shown in fig. 4, SD is the outer diameter of the stator 10 and SI is the outer diameter of the rotor.

In summary, according to the rotor structure and the motor provided by the utility model, the cogging torque can be effectively reduced by the structural design that the edges of the rotor core corresponding to the two magnetic isolation bridges are cut off, so that the noise generated during the operation of the motor is reduced, and the operation efficiency of the motor is improved.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

Claims (10)

1. The rotor structure is characterized by comprising a rotor core (1), wherein a plurality of V-shaped mounting grooves (2) are formed in the rotor core (1) along the circumferential direction, a layout area (3) is formed between the V-shaped mounting grooves (2) and the outer edge of the rotor core (1), and a plurality of magnetism isolating holes (4) are formed in the layout area (3);

two ends of the V-shaped mounting groove (2) are respectively provided with a magnetism isolating bridge (5), the V-shaped mounting groove (2) comprises two symmetrically distributed side grooves, and permanent magnets (6) are arranged in the side grooves;

a cutting edge (7) is formed at the outer edge of the rotor core (1) corresponding to the two magnetic isolation bridges (5) which are adjacent to each other between the two V-shaped mounting grooves (2).

2. The rotor structure according to claim 1, characterized in that the length of the cut edge (7) is given by L, the length of the permanent magnet (6) is given by W, the L and W satisfying 0.68 x W < = L < = 0.90 x W.

3. The rotor structure according to claim 1, characterized in that the length of the cut edge (7) is set to L, the pole arc of the rotor core (1) is set to T, and L and T satisfy 0.31 x T < = L < = 0.50 x T.

4. The rotor structure according to claim 1, characterized in that the number of the magnetism isolating holes (4) is two, and the two magnetism isolating holes (4) are respectively positioned at two sides of the symmetry axis of the arrangement area (3).

5. The rotor structure according to claim 1, characterized in that the number of the magnetism isolating holes (4) is four, and the four magnetism isolating holes (4) are located on two sides of the symmetry axis of the layout area (3) in pairs;

the two magnetism isolating holes (4) positioned on the same side of the symmetry axis of the layout area (3) are different in form.

6. Rotor structure according to claim 1, characterized in that the number of V-shaped mounting grooves (2) is 8, and the angle between two permanent magnets (6) in a V-shaped mounting groove (2) is 115-135 °.

7. Rotor structure according to claim 1, characterized in that positioning protrusions (8) for positioning the permanent magnets (6) are formed inwardly at the edges of the side grooves.

8. The rotor structure according to claim 1, wherein a plurality of refrigerant passage holes (9) uniformly distributed along the circumferential direction are formed in the rotor core (1) at positions close to the axis thereof.

9. The rotor structure according to claim 8, wherein the refrigerant passage holes (9) are of a waist-shaped structure, and the number of the refrigerant passage holes (9) is 4-8.

10. A motor characterized by comprising a stator (10) and a rotor structure according to any one of claims 1-9;

the stator (10) and the rotor core (1) are coaxially arranged, and the stator (10) is positioned at the outer side of the rotor core (1);

the outer diameter of the stator (10) is 70-105mm.