CN215911960U

CN215911960U - Motor for rotary compressor

Info

Publication number: CN215911960U
Application number: CN202122131757.2U
Authority: CN
Inventors: 炊军立; 杨青; 刘明星; 李晓婉; 孙琦
Original assignee: TCL Rechi Huizhou Refrigeration Equipment Co Ltd
Current assignee: TCL Rechi Huizhou Refrigeration Equipment Co Ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-02-25
Anticipated expiration: 2031-09-03

Abstract

The utility model provides a motor for a rotary compressor. The utility model provides a motor for rotary compressor, including the casing and assemble in inside stator and the rotor of casing, the rotor is located the stator and concentric with the stator, the circumference outer wall of rotor is equipped with the outside bellied arc of multistage arch, the axle center of rotor is connected with the bent axle, rotor core is last all to be equipped with 1 magnet hole in one side that every section arc arch is close to the centre of a circle, form between the both ends in every magnet hole and rotor core's the outward flange and separate the magnetism bridge, it is protruding with the arc that corresponds to form bow-shaped region between every magnet hole, bow-shaped regional both ends are equipped with 1 respectively and separate the magnetism hole. According to the utility model, through the design of 2 magnetic isolation holes in each arched area, the distribution of a magnetic field tends to be sinusoidal, so that the magnetic flux leakage is reduced, the waveform of the induced voltage of the stator tends to be sinusoidal, and the electromagnetic noise is reduced; the motor has the advantages of less magnet consumption, low cost, good sine property of induced voltage and small stress and deformation, and obviously improves the efficiency of the motor.

Description

Motor for rotary compressor

Technical Field

The utility model relates to the technical field of air conditioner compressor motors, in particular to a motor for a rotary compressor.

Background

In the vehicle air conditioner, a currently commonly used compressor is a vertical rotary compressor, a rotating shaft of the vertical rotary compressor is driven by a motor, and an eccentric portion drives a ring to compress refrigerant gas. Like this, the efficiency height of motor is with the performance of direct influence compressor, and current motor has the multiple type, and the common 6 utmost point 9 groove directly wind the motor that has, and the compressor motor that uses always at present is because rotor core's magnetic field distribution sinusoidal degree is lower, and the magnetic leakage volume is great for the phenomenon that the motor often appears the electromagnetic sound big, high efficiency rotational speed scope is little, and the motor is under normal rotational speed, and efficiency is lower.

SUMMERY OF THE UTILITY MODEL

The present invention provides a motor for a rotary compressor, which solves the problems that the motor is often accompanied with large electromagnetic noise and small high-efficiency rotating speed range due to low magnetic field distribution sine degree and large magnetic leakage amount of a rotor core in the motor for the rotary compressor in the background art. The utility model can reduce the electromagnetic sound of the motor and ensure that the efficiency of the motor is higher under the normal rotating speed.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a motor for rotary compressor, including the casing and assemble in inside stator and the rotor of casing, the rotor is located in the stator and with the stator is concentric, the circumference outer wall of rotor is equipped with multistage evenly distributed's arc arch, the axle center of rotor is connected with the bent axle, rotor core is last all to be equipped with 1 style of calligraphy magnet hole in the protruding one side that is close to the centre of a circle of every section arc, insert in the magnet hole and be equipped with the magnetite, there is the interval between the adjacent magnet hole, the both ends in every magnet hole with form between rotor core's the outward flange and separate the magnetic bridge, form bow-shaped region between every magnet hole and the arc arch that corresponds, bow-shaped region's both ends are equipped with 1 respectively and separate the magnetic hole.

Further, the rotor is petal-shaped, and unequal gaps are formed between the outer wall of the rotor and the inner wall of the stator.

Furthermore, the included angle between the magnetism isolating hole and the corresponding magnet hole is 20-40 degrees.

Furthermore, the number of the arc-shaped protrusions and the number of the magnet holes are both 6.

Furthermore, the arc-shaped bulge is an arc, and the circle center of the arc-shaped bulge is coincided with the axis; the ratio of the minimum distance to the maximum distance between the circumferential edge of the rotor and the axis of the rotor is 0.95 to 0.98.

Preferably, the ratio of the chord center distance from the magnet hole to the axis to the corresponding radius of the arc-shaped bulge is 0.75-0.85.

Furthermore, two ends of the magnet hole are respectively provided with a positioning bulge.

Furthermore, a plurality of refrigerant passage holes are formed in the rotor around the crankshaft.

Preferably, the refrigerant passage hole has a fan shape.

Preferably, the width of the magnetic isolation bridge is 0.4-0.5 mm.

Compared with the prior art, the beneficial effects are:

the rotor of the motor adopts the design of irregular periphery, so that unequal gaps are formed between the rotor and the stator, and the magnetic field distribution tends to be sinusoidal through the design of 2 magnetic isolation holes in each arched area, thereby reducing the magnetic leakage, causing the waveform of the induced voltage of the stator to tend to be sinusoidal, and reducing the electromagnetic noise; the utility model has the advantages of less magnet consumption, low cost, good sine of induced voltage and small stress and deformation, and obviously improves the efficiency of the motor.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the structure of the rotor in the present invention.

Fig. 3 is a schematic view of the structure of the end face of the rotor in the present invention.

Fig. 4 is a schematic view of the structure of the arcuate region on the rotor of the present invention.

Fig. 5 is a schematic view showing the distribution of magnetic lines of force of the rotor in the present invention.

Fig. 6 is a waveform diagram of an induced voltage of the rotor in the present invention.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The technical scheme of the utility model is further described in detail by the following specific embodiments in combination with the attached drawings:

as shown in fig. 1, there is a motor for a rotary compressor, comprising a housing 3, and a stator 2 and a rotor 1 assembled inside the housing 3, the rotor 1 being positioned inside the stator 2 and concentric with the stator 2, as shown in fig. 2 and fig. 3, the circumferential outer wall of the rotor 1 is provided with 6 segments of arc-shaped protrusions 11 which are uniformly distributed, the axial center 15 of the rotor 1 is provided with an axial hole, a crankshaft is connected in the shaft hole, 1 linear magnet hole 12 is arranged on one side of each section of arc-shaped bulge 11 close to the circle center on the rotor 1, that is, the number of the arc-shaped protrusions 11 and the number of the magnet holes 12 are 6, magnets (permanent magnets) are inserted into the magnet holes 12, a space exists between the adjacent magnet holes 12, a magnetic isolation bridge 19 is formed between the two ends of each magnet hole 12 and the outer edge of the iron core of the rotor 1, an arc-shaped area 13 is formed between each magnet hole 12 and the corresponding arc-

shaped protrusion

11, and 1 magnetic isolation hole 14 is respectively arranged at each of the two ends of each arc-shaped area 13.

As shown in fig. 3 to 4, the arc-shaped protrusion 11 is an arc, and the center of the arc-shaped protrusion 11 coincides with the axis 15; from the radial section of the rotor, two arcs with different radiuses are uniformly and alternately arranged on the whole periphery of the rotor 1, two adjacent arcs are connected through a smooth curve, and the ratio of the minimum distance (namely, the minimum radius) to the maximum distance (namely, the maximum radius corresponding to the arc-shaped protrusion 11) between the circumferential edge of the rotor 1 and the axis 15 of the rotor 1 is 0.95-0.98; therefore, the radial section of the whole rotor 1 is in a hexagonal petal shape, and the outer wall of the rotor 1 and the inner wall of the stator 2 are not in equal clearance.

The included angle between the magnetism isolating hole 14 and the corresponding magnet hole 12 is 20-40 degrees; the ratio of the chord center distance from the magnet hole 12 to the axis 15 to the corresponding radius of the arc-shaped bulge 11 is 0.75-0.85.

Two ends of the magnet hole 12 are respectively provided with a positioning bulge 18; a plurality of refrigerant passage holes 16 are arranged on the rotor 1 around the crankshaft; the refrigerant passage hole 16 has a fan shape. Therefore, a large-area refrigerant circulation channel is arranged at the center of the rotor 1 close to the rotating shaft, so that the flow resistance of the refrigerant is reduced, and the heat dissipation of the rotor 1 is enhanced. Positioning protrusions 18 are arranged at two ends of the magnet hole 12 to prevent the magnet from moving; the same as general rotor 1, rivet hole 17 has also been seted up on rotor 1, and rivet hole 17 sets up the position of being close the magnetite, and the contained angle position of per two adjacent magnetite holes 12 all sets up a rivet hole 17, can reduce the influence to magnetic field like this.

In this embodiment, the width of the magnetic isolation bridge 19 is 0.4-0.5 mm; the width of the magnetic isolation bridge 19 is the minimum distance between one side edge of the end of the magnet hole 12 close to the rotor 1 and the edge of the rotor 1; such an arrangement can reduce leakage flux.

The embodiment is a novel motor structure, adopts 6 utmost points 9 groove structures, and the magnetite is 6 pieces of a style of calligraphy, inserts in rotor 1 iron core inside from magnetite hole 12. The stator 2 is designed by 9-slot concentrated winding, and has a direct winding process with less copper wire usage and easy production. The rotor 1 is positioned in the center of a motor rotating shaft and is concentric with the stator 2, the rotor 1 is of an iron core structure, due to the fact that the rotor of the motor is designed with irregular periphery, gaps between the rotor and the stator are unequal, electromagnetic steel plates at the edge of a magnet are provided with 2 magnetic isolation holes 14, magnetic lines of force are distributed as shown in figure 5 through the arrangement of the magnetic isolation holes 14, and induced voltage waveform test results are shown in figure 6, therefore, the magnetic field distribution tends to be sinusoidal in the embodiment, magnetic leakage is reduced, induced voltage waveforms of the stator 2 tend to be sinusoidal, and electromagnetic noise is reduced; the embodiment has the advantages of less magnet consumption, low cost, good sine of induced voltage and small stress and deformation, and obviously improves the efficiency of the motor.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A motor for a rotary compressor comprises a shell (3), a stator (2) and a rotor (1) which are assembled inside the shell (3), wherein the rotor (1) is positioned in the stator (2) and is concentric with the stator (2), the motor is characterized in that a plurality of arc-shaped bulges (11) which are uniformly distributed are arranged on the circumferential outer wall of the rotor (1), a crankshaft is connected with the axis (15) of the rotor (1), 1 linear magnet hole (12) is arranged on one side, close to the center of a circle, of each arc-shaped bulge (11) on the rotor (1), a magnet is inserted in each magnet hole (12), a space exists between every two adjacent magnet holes (12), a magnetic isolation bridge (19) is formed between the two ends of each magnet hole (12) and the outer edge of an iron core of the rotor (1), and an arc-shaped area (13) is formed between each magnet hole (12) and the corresponding arc-shaped bulge (11), two ends of the arch-shaped area (13) are respectively provided with 1 magnetism isolating hole (14).

2. The motor for rotary compressor of claim 1, wherein the rotor (1) is petaloid, and the outer wall of the rotor (1) and the inner wall of the stator (2) have unequal gaps therebetween.

3. The motor for a rotary compressor of claim 1, wherein an angle between the magnetism isolating hole (14) and the corresponding magnet hole (12) is 20 ° to 40 °.

4. The motor for a rotary compressor of claim 1, wherein the number of the arc-shaped protrusions (11) and the magnet holes (12) is 6 each.

5. The motor for a rotary compressor according to claim 2, wherein the arc-shaped projection (11) is an arc of a circle, the center of the arc-shaped projection (11) coinciding with the shaft center (15); the ratio of the minimum distance to the maximum distance between the circumferential edge of the rotor (1) and the axis (15) of the rotor (1) is 0.95-0.98.

6. The motor for a rotary compressor of claim 5, wherein a ratio of a chord center distance from the magnet hole (12) to the shaft center (15) to a corresponding radius of the arc-shaped projection (11) is 0.75 to 0.85.

7. The motor for a rotary compressor of claim 1, wherein both ends of the magnet hole (12) are provided with a positioning boss (18), respectively.

8. The motor for rotary compressor of claim 1, wherein the rotor (1) is provided with a plurality of refrigerant passage holes (16) around the crankshaft.

9. The motor for a rotary compressor of claim 8, wherein the refrigerant passage hole (16) is formed in a sector shape.

10. The motor for a rotary compressor of claim 1, wherein the width of the magnetic isolation bridge (19) is 0.4 to 0.5 mm.