A motor and a refrigeration device

Abstract

The application discloses a motor and a refrigerating device, relates to the technical field of motors, and solves the problems of existing motor stator waste and limited installation space, reduces the effective volume of the motor, prevents axial jumping of a rotor, and specifically has the following arrangement: a stator assembly and a rotor assembly rotatingly arranged in a hole of the stator assembly, the rotor assembly and the stator assembly are matched through radial magnetic flux and axial magnetic flux, the stator assembly is composed of a first stator core, a second stator core and a third stator core which are stamped together in a thick stack, the first stator core, the second stator core and the third stator core are sequentially arranged from top to bottom, the first stator core is a winding forming structure, and the second stator core and the third stator core are stamping forming structures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an electric machine and a refrigeration device. BACKGROUND

[0002] At present, the variable frequency electric machine applied to the refrigerator compressor has a high popularization rate due to its high efficiency and adjustable speed, and the variable frequency electric machine is a permanent magnet electric machine, and the pole-slot matching is usually 6-pole 9-slot or 4-pole 6-slot, and the existing problems are as follows:

[0003] 1. After the stator is punched and formed, the silicon steel in the stator slot is punched out as waste, since the stator slot area accounts for about 50% of the total stator area, the material utilization rate of the electric machine is only 50%-60%, which increases the cost of the electric machine;

[0004] 2. The silicon steel sheet punched out by the die of the electric machine core is stacked to a specified thickness, and under the usual state, as the stacking thickness increases, the efficiency of the electric machine at the operating point will increase, therefore, the high-efficiency product usually has a higher stacking thickness, and the height of the entire compressor will also increase, and the space of the compressor in the refrigerator needs to be larger to meet the placement requirement of the compressor;

[0005] 3. On a small compressor, the rotor is light in weight, and in the actual operation of the compressor, especially at a low speed, the rotor will jump along the axial direction, and under the condition of unstable operation, the rotor will touch the shaft hole of the cylinder seat, increase the friction loss, reduce the performance, and at the same time, there is an abnormal sound and the noise value increases.

[0006] The inventor finds that the main improvement measures in the actual design are as follows:

[0007] 1. In order to improve the material utilization rate, the stator punching profile is designed in combination with the punching arrangement in the die, and a double-row arrangement is usually adopted to reduce the width of the steel strip and improve the material utilization rate, but this method can only solve the utilization rate of the stator profile part and cannot solve the problem of the stator slot punching waste;

[0008] 2. In order to improve the efficiency and reduce the stacking thickness of the electric machine, the size of the electric machine is usually increased, the slot area is increased, and the copper loss is reduced, although the height is reduced by this method, the width is increased, and the space required for placing the actual compressor is not reduced; in addition, the efficiency can also be improved by increasing the grade of silicon steel or magnetic steel and using copper wire, but the cost of the electric machine is increased;

[0009] 3. In order to solve the problem of stable operation of the small compressor, a counterweight is usually added to the rotor or the crankshaft to increase the moment of inertia, but since the space on the small compressor is compact, the assembly of the required counterweight cannot be met. SUMMARY

[0010] In view of the deficiencies of the prior art, the motor and the refrigeration device provided by the application are characterized in that a plurality of stator cores are stacked and punched together, the first stator core is in a winding forming structure, and the utilization rate of the stator core material is effectively improved relative to the stator core formed by punching only, the cooperation of the radial magnetic flux and the axial magnetic flux reduces the effective volume of the motor and prevents the rotor from jumping axially, and the problems of waste of the stator of the existing motor and limitation of the installation space are solved.

[0011] In order to achieve the above-mentioned purpose, the application is implemented by the following technical scheme:

[0012] In the first aspect, the application provides a motor, which comprises a stator assembly and a rotor assembly rotatably arranged in a hole of the stator assembly, the rotor assembly and the stator assembly are cooperated by radial magnetic flux and axial magnetic flux, the stator assembly is composed of a first stator core, a second stator core and a third stator core stacked and punched together, the first stator core, the second stator core and the third stator core are arranged in sequence from top to bottom, the first stator core is in a winding forming structure, and the second stator core and the third stator core are in a punching forming structure.

[0013] As a further implementation manner, the rotor assembly is composed of a rotor core and a plurality of magnetic steels fixedly arranged on the rotor core, and the magnetic steels are L-shaped.

[0014] As a further implementation manner, the magnetic steels are composed of an integral vertical plate and a horizontal plate, the vertical plate is fixedly arranged on the side wall of the rotor core, and the horizontal plate is fixedly arranged on the bottom surface of the rotor core.

[0015] As a further implementation manner, the rotor assembly and the stator assembly are in clearance fit.

[0016] As a further implementation manner, the tooth slot space of the first stator core is complementary.

[0017] As a further implementation manner, the first stator core is composed of a ring-shaped first yoke and a plurality of first punching teeth fixedly arranged on the inner side of the first yoke in a ring direction, the second stator core is composed of a plate-shaped second yoke and a plurality of second punching teeth fixedly arranged on the inner side of the second yoke in a circumferential direction, and the third stator core is composed of a plate-shaped third yoke and a plurality of third punching teeth fixedly arranged on the inner side of the third yoke in a circumferential direction.

[0018] As a further implementation manner, the number of the first punching teeth, the second punching teeth and the third punching teeth is equal and one-to-one corresponding, and the length and the cross-sectional area of the third punching teeth are greater than those of the first punching teeth and the second punching teeth.

[0019] As a further implementation manner, the first punching piece tooth, the second punching piece tooth and the third punching piece tooth enclose a first inner hole, a second inner hole and a third inner hole respectively, and the first inner hole and the second inner hole have the same diameter and are smaller than the third inner hole.

[0020] As a further implementation manner, mounting holes are arranged on the second yoke part and the third yoke part, the mounting holes on the third yoke part correspond to the mounting holes on the second yoke part one by one, and a plurality of alignment grooves corresponding to each other are arranged on the outer walls of the first yoke part, the second yoke part and the third yoke part in a circumferential direction.

[0021] In a second aspect, the application provides a refrigeration device using the motor of the first aspect.

[0022] The beneficial effects of the application are as follows:

[0023] (1) The plurality of stator cores are stamped together, the first stator core is a winding formed structure, and the utilization rate of the stator core material is effectively improved by the cooperation between the winding formed core and the stamping formed core, and the cooperation of the radial magnetic flux and the axial magnetic flux reduces the effective volume of the motor and prevents the rotor from jumping axially.

[0024] (2) The magnetic steel 5 is an L-shaped structure, which can effectively utilize the space at the bottom of the press, increase the cooperation of the stator and rotor axial magnetic circuit, improve the efficiency of the motor, improve the power density of the motor, effectively save the space of the refrigerator press warehouse, and improve the effective storage capacity of the refrigerator.

[0025] (3) The outer walls of the first yoke part, the second yoke part and the third yoke part are provided with a plurality of alignment grooves corresponding to each other in a circumferential direction, which is more convenient for the installation of the stator core and effectively improves the installation efficiency and precision.

[0026] (4) The second yoke part and the third yoke part are provided with mounting holes, which greatly facilitate the installation of the first stator core. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings accompanying the specification of the application form a part of the application and serve to provide further understanding of the application, and the exemplary embodiments of the application and their descriptions serve to explain the application, and do not constitute an improper limitation on the application.

[0028] Figure 1 is a schematic diagram of the overall structure of a motor according to one or more embodiments of the application;

[0029] Figure 2 is a schematic diagram of the overall structure of a motor according to one or more embodiments of the application;

[0030] Figure 3 is a bottom structure schematic diagram of a motor according to one or more embodiments of the present application;

[0031] Figure 4 is an exploded structure schematic diagram of a stator assembly according to one or more embodiments of the present application;

[0032] Figure 5 is an exploded structure schematic diagram of a rotor assembly according to one or more embodiments of the present application;

[0033] Figure 6 is a structure schematic diagram of a magnetic steel according to one or more embodiments of the present application;

[0034] In the drawings: the mutual distance or size is exaggerated for showing the position of each part, and the schematic diagram is only for illustration;

[0035] Wherein, 1, first stator core; 11, first yoke part; 12, first punching tooth; 13, first punching slot; 2, second stator core; 21, second yoke part; 22, second punching tooth; 23, second punching slot; 3, third stator core; 31, third yoke part; 32, third punching tooth; 33, third punching slot; 4, rotor core; 5, magnetic steel; 6, calibration slot; 7, mounting hole. DETAILED DESCRIPTION

[0036] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0037] As introduced in the background, the existing motor cannot solve the problems of stator slot punching waste and limited installation space. In order to solve the above technical problems, the present application proposes a motor and a refrigeration device.

[0038] Embodiment 1

[0039] In a typical embodiment of the present application, as shown in Figures 1-6 , a motor is proposed, which comprises a stator assembly and a rotor assembly cooperating with the stator assembly.

[0040] As shown in Figure 4 , the stator assembly is composed of a first stator core 1, a second stator core 2 and a third stator core 3, which are arranged in order from top to bottom, and the first stator core 1, the second stator core 2 and the third stator core 3 are coaxially arranged.

[0041] The first stator core 1 is formed by winding equipment, adopts double row arrangement, and the tooth groove space is complementary. The second stator core 2 and the third stator core 3 are punched by stamping equipment and adopt double row arrangement. Through cooperation between the winding formed core and the punched formed core, the utilization rate of the stator core material is effectively improved compared with the stator core formed by punching.

[0042] The first stator core 1, the second stator core 2 and the third stator core 3 are stacked and punched together by pressure equipment. The first stator core 1, the second stator core 2 and the third stator core 3 are all provided with rivet structures, and the first stator core 1, the second stator core 2 and the third stator core 3 are fixedly connected through the rivet structures.

[0043] It can be understood that the first stator core 1, the second stator core 2 and the third stator core 3 are combined, that is, they can be used simultaneously, or two of them can be used, or other stator cores can be added. The specific determination can be made according to actual needs.

[0044] The first stator core 1, the second stator core 2 and the third stator core 3 are all made of magnetic conductive material. The first stator core 1 is provided with a first inner hole for installing a rotor assembly at a central position of the first stator core 1. The first inner hole is a through hole structure, and the first inner hole is arranged along the axial direction of the first stator core 1.

[0045] The second stator core 2 is provided with a second inner hole for installing a rotor assembly at a central position of the second stator core 2. The second inner hole is also a through hole structure, and the second inner hole is arranged along the axial direction of the second stator core 2. The diameter of the second inner hole is the same as that of the first inner hole.

[0046] The third stator core 3 is provided with a third inner hole for installing a rotor assembly at a central position of the third stator core 3. The third inner hole is a through hole structure, and the third inner hole is arranged along the axial direction of the third stator core 3. The diameter of the third inner hole is smaller than that of the first inner hole and the second inner hole.

[0047] The first stator core 1, the second stator core 2 and the third stator core 3 are all provided with punched teeth. Specifically, the first stator core 1 is provided with a first yoke portion 11 and a plurality of first punched teeth 12 fixedly arranged on the inner side of the first yoke portion 11 in a ring shape. The first punched teeth 12 are uniformly and evenly arranged along the ring direction of the first yoke portion 11 and extend inward. The plurality of first punched teeth 12 form a first inner hole. The thickness of the first punched teeth 12 is the same as that of the first yoke portion 11. A first punched groove 13 is formed between the adjacent two first punched teeth 12.

[0048] The second stator core 2 is composed of a plate-shaped second yoke 21 and a plurality of second lamination teeth 22 fixed on the inner side of the second yoke 21 in the circumferential direction, the second lamination teeth 22 are uniformly spaced along the circumferential direction of the second yoke 21 and extend inward, the plurality of second lamination teeth 22 enclose a second inner hole, the thickness of the second lamination teeth 22 is the same as the thickness of the second yoke 21, and a second lamination slot 23 is formed between adjacent two second lamination teeth 22.

[0049] Among them, the second yoke 21 is also uniformly provided with a plurality of mounting holes 7 along the circumferential direction, which can facilitate the fixation of the first stator core 1 in the equipment, the cross-sectional area of the second yoke 21 is larger than that of the first yoke 11, and the cross-sectional shape of the second lamination teeth 22 is the same as that of the first lamination teeth 12 and the area is equal.

[0050] The third stator core 3 is composed of a plate-shaped third yoke 31 and a plurality of third lamination teeth 32 fixed on the inner side of the third yoke 31 in the circumferential direction, the third lamination teeth 32 are uniformly spaced along the circumferential direction of the third yoke 31 and extend inward, the plurality of third lamination teeth 32 enclose a third inner hole, the thickness of the third lamination teeth 32 is the same as the thickness of the third yoke 31, and a third lamination slot 33 is formed between adjacent two third lamination teeth 32.

[0051] The third yoke 31 is also uniformly provided with a plurality of mounting holes 7 along the circumferential direction, the mounting holes 7 on the third yoke 31 correspond to the mounting holes 7 on the second yoke 21 one by one, the mounting holes 7 are through hole structures, and the outer contour of the third yoke 31 is the same as that of the second yoke 21.

[0052] The length and cross-sectional area of the third lamination teeth 32 are larger than those of the first lamination teeth 12 and the second lamination teeth 22, and the number of the first lamination teeth 12, the second lamination teeth 22 and the third lamination teeth 32 is the same.

[0053] A plurality of alignment slots 6 corresponding to each other are uniformly arranged on the outer wall of the first yoke 11, the second yoke 21 and the third yoke 31 in the circumferential direction, which are used for the alignment of the relative positions of the first yoke 11, the second yoke 21 and the third yoke 31 during installation, and ensure the coaxiality of the upper and lower lamination slots.

[0054] As shown in Figure 5 The rotor assembly is composed of a rotor core 4 and a magnetic steel 5, the magnetic steel 5 is an L-shaped structure made of ferrite or rare earth materials to provide magnetic energy for the rotor, the rotor core 4 is made of magnetic conductive material, and the magnetic steel 5 is fixed on the rotor core 4 by glue or other adhesives.

[0055] Specifically, the magnetic steel 5 is provided with a plurality of magnetic steels 5, which are uniformly arranged along the circumferential direction of the rotor core 4, the magnetic steel 5 is composed of a vertical plate and a horizontal plate, the vertical plate and the horizontal plate are integrally formed, the vertical plate is fixedly arranged on the side wall of the rotor core 4, and the horizontal plate is fixedly arranged on the bottom surface of the rotor core 4.

[0056] The rotor assembly is installed in the inner hole of the stator assembly, adopts the combination of radial magnetic flux and axial magnetic flux, improves the motor power density, reduces the effective volume of the motor, and the gap is matched between the side wall and the bottom of the rotor assembly and the inner hole of the stator assembly.

[0057] Since the magnetic steel 5 is of L-shaped structure, the bottom space of the compressor can be effectively utilized, the cooperation of the axial magnetic circuits of the stator and the rotor is increased, the efficiency of the motor is improved on the basis of maintaining the original thickness, the power density of the motor is improved, the space of the compressor in the refrigerator is effectively saved, and the effective storage capacity of the refrigerator is improved.

[0058] Meanwhile, the magnetic field of the L-shaped magnetic steel 5 on the rotor core 4 passing through the third stator core 3 generates downward magnetic pull, effectively prevents the axial jump of the rotor, and ensures the stable operation of the compressor.

[0059] Embodiment 2

[0060] In another typical embodiment of the present application, a refrigeration device is provided, which utilizes the motor as described in Embodiment 1, the rotor assembly is fixedly arranged on the crankshaft, and the stator assembly is fixedly arranged in the bottom space of the compressor.

[0061] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electric machine characterized in that, The motor comprises a stator assembly and a rotor assembly arranged in a hole of the stator assembly, and the rotor assembly and the stator assembly are matched by radial magnetic flux and axial magnetic flux, the stator assembly is composed of a first stator core, a second stator core and a third stator core which are stamped together, the first stator core, the second stator core and the third stator core are arranged in sequence from top to bottom, the first stator core is a winding forming structure, and the second stator core and the third stator core are stamping forming structures. The rotor assembly is composed of a rotor core and a plurality of magnetic steels fixed on the rotor core, the magnetic steels are L-shaped, and each magnetic steel is composed of a vertical plate and a horizontal plate which are integrally formed, the vertical plate is fixed on a side wall of the rotor core, and the horizontal plate is fixed on a bottom surface of the rotor core. The first stator core is composed of a ring-shaped first yoke and a plurality of first stamping teeth fixed on an inner side of the first yoke in a ring direction, the second stator core is composed of a plate-shaped second yoke and a plurality of second stamping teeth fixed on an inner side of the second yoke in a circumferential direction, and the third stator core is composed of a plate-shaped third yoke and a plurality of third stamping teeth fixed on an inner side of the third yoke in a circumferential direction. The first stamping teeth, the second stamping teeth and the third stamping teeth are equal in number and one-to-one corresponding, and the length and the cross-sectional area of the third stamping teeth are greater than those of the first stamping teeth and the second stamping teeth.

2. An electric machine as claimed in claim 1, characterised in that The rotor assembly and the stator assembly are in clearance fit.

3. An electric machine as recited in claim 1, characterized in that The tooth slot spaces of the first stator core are complementary.

4. An electric machine as recited in claim 1, wherein The first stamping teeth, the second stamping teeth and the third stamping teeth are enclosed into a first inner hole, a second inner hole and a third inner hole respectively, the first inner hole, the second inner hole and the third inner hole are coaxially arranged, the diameter of the first inner hole is the same as that of the second inner hole, and both of them are smaller than that of the third inner hole.

5. An electric machine as recited in claim 1, wherein The second yoke and the third yoke are each provided with a mounting hole, the mounting holes of the second yoke and the third yoke are one-to-one corresponding, and the outer walls of the first yoke, the second yoke and the third yoke are each provided with a plurality of alignment grooves which are one-to-one corresponding and are spaced apart in a circumferential direction.

6. A refrigeration apparatus characterized by comprising: The motor is used.

Images