CN114731073A - Motor and compressor using the same - Google Patents
Motor and compressor using the same Download PDFInfo
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- CN114731073A CN114731073A CN202080083207.3A CN202080083207A CN114731073A CN 114731073 A CN114731073 A CN 114731073A CN 202080083207 A CN202080083207 A CN 202080083207A CN 114731073 A CN114731073 A CN 114731073A
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- 238000010030 laminating Methods 0.000 claims abstract description 17
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 21
- 239000000956 alloy Substances 0.000 claims description 20
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000002159 nanocrystal Substances 0.000 claims description 4
- 239000002707 nanocrystalline material Substances 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 15
- 239000000696 magnetic material Substances 0.000 description 16
- 239000003507 refrigerant Substances 0.000 description 9
- 238000003475 lamination Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 238000005304 joining Methods 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The motor includes a rotor and a stator for rotating the rotor, the stator being configured by magnetically coupling a plurality of divided stator pieces 21 formed by folding and laminating a plurality of continuously coupled stator plates 24 integrally having a yoke portion 22 and a tooth portion 23. Accordingly, it is possible to reduce the complicated and time-consuming process of aligning and stacking the shapes of the dispersed stator plates at the time of stacking the stator plates 24, to greatly simplify the stacking process, to reduce the manufacturing cost, and to provide an inexpensive motor and a compressor using the same.
Description
Technical Field
The present invention relates to a motor and a compressor using the same.
Background
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2014-155347
Disclosure of Invention
Technical problem to be solved by the invention
The invention provides a motor and a compressor using the same, which simplifies the lamination process of stator plates forming the divided stator blocks and reduces the manufacturing cost.
Technical solution for solving technical problem
The motor of the present invention is a motor in which divided stator pieces, each of which is formed by folding and laminating a plurality of continuously connected stator plates integrally having a yoke portion and a tooth portion, are connected to form a stator.
Effects of the invention
The motor of the invention can reduce the complicated and time-consuming steps of aligning and laminating the shapes of the dispersedly separated stator plates when the stator plates are laminated, and does not need the step of jointing the yoke part and the tooth part when the stator plates are formed. Therefore, the lamination process can be greatly simplified, the manufacturing cost can be reduced, and an inexpensive motor and a compressor using the same can be provided.
Drawings
Fig. 1 is a sectional view of a motor and a compressor using the motor in embodiment 1.
Fig. 2 is a perspective view showing a stator of the electric motor (motor unit) according to embodiment 1.
Fig. 3 is an exploded perspective view showing a state before winding of a stator of the motor unit.
Fig. 4 is a perspective view of a stator of the motor unit and divided stator pieces constituting the stator.
Fig. 5 is an enlarged perspective view of the divided stator block of the motor unit.
Fig. 6 is a perspective view of a stator plate of the divided stator blocks constituting the motor unit.
Fig. 7 is a plan view of a stator element plate for explaining formation of a stator plate of the stator.
Fig. 8 is a perspective view showing a state before the motor unit is mounted to the compressor.
Fig. 9 is an exploded perspective view of fig. 8.
Fig. 10 is an enlarged sectional view showing a fixing structure portion of the motor portion to the sealed container of the compressor in embodiment 1.
Fig. 11 is a sectional view showing a fixing structure of a sealed container to a motor unit in embodiment 2.
Fig. 12 is a plan view (top view) illustrating a stator element plate of another fixing structure of a sealed container for a motor unit in embodiment 3.
Fig. 13 is a perspective view of a stator constructed by laminating stator plates obtained by compression molding the stator material plates according to embodiment 3.
Fig. 14 is a plan view of a state in which the stator in embodiment 3 is fixed to a hermetic container of a compressor by shrink fitting.
Fig. 15 is a perspective view of a stator divided stator block constituting a conventional motor.
Fig. 16 is an exploded perspective view showing a yoke portion and a tooth portion of a divided stator piece constituting a stator of a conventional motor.
Detailed Description
(knowledge and the like on which the present invention is based)
When the inventors have come to the present invention, a motor described in patent document 1 is known. In this motor, the first laminated body 102 and the second laminated body 104 constitute divided stator blocks (also referred to as "divided stator assemblies"), and the stator plates constituting the first laminated body 102 and the second laminated body 104 are formed separately from each other. Therefore, when the stator plates 101 and 103 constituting the first stacked body 102 or the second stacked body 104 are stacked, a complicated step of stacking the dispersedly separated stator plates 101 and 103 in a uniform shape is required. Specifically, the amorphous thin plates constituting the second stacked body 104 are extremely thin as compared with the electromagnetic steel plates. Therefore, conventionally, it is impossible to stack the stator plates by caulking in a press die like the electromagnetic steel plates, and the stator plates cut in advance into a predetermined shape need to be bonded and laminated with an adhesive, which causes a problem of increase in manufacturing cost. In addition, even when the electromagnetic steel sheets constituting the first laminate 102 are made to have a thickness that is as thin as the amorphous thin sheet, the electromagnetic steel sheets are cut into a predetermined shape in advance, and then the stator sheets are aligned and bonded with an adhesive to be laminated, which increases the manufacturing cost. Further, the complicated step of laminating the stator plates 101 and 103 in a uniform shape needs to be performed in accordance with the number of divided stator pieces 100 constituting the stator, which greatly affects the manufacturing cost and promotes the increase in the manufacturing cost. Further, since the stator plates 103 constituting the second laminated body 104 are formed of amorphous thin plates with less iron loss, high efficiency can be achieved. However, a process of separately forming and joining the yoke portion 105 and the tooth portion 106 is required, which causes a problem that the manufacturing cost increases.
The present inventors have completed the present invention in view of such problems and in order to solve these problems.
Accordingly, the present invention provides an inexpensive motor and a compressor using the same, which simplify the lamination process of stator plates constituting divided stator blocks and reduce the manufacturing cost.
Hereinafter, embodiments will be described in detail with reference to the drawings. However, the detailed description may be omitted to the extent necessary. For example, detailed descriptions of known matters may be omitted, or substantially the same components may be denoted by the same reference numerals in the modified examples, and redundant descriptions may be omitted. This is to avoid unnecessarily obscuring the following description, as will be readily understood by those skilled in the art.
In the present invention, a rotary compressor using a motor is described as an example, but the motor and the compressor using the motor are not limited to the configurations of the motor and the rotary compressor described in the following embodiments, and include configurations of the motor and the compressor equivalent to the technical ideas described in the following embodiments.
The embodiments described below are merely exemplary embodiments of the present invention, and the structures, functions, operations, and the like described in the embodiments are merely examples and do not limit the present invention.
(embodiment mode 1)
Hereinafter, embodiment 1 of the motor and the compressor using the motor according to the present invention will be described with reference to fig. 1 to 10.
[1-1. Structure ]
(embodiment mode 1)
Fig. 1 is a longitudinal sectional view of a compressor using a motor according to an embodiment of the present invention.
The compressor of the present embodiment is configured by providing a motor unit (motor) 2 and a compression mechanism unit 3 in a sealed container 1. The closed casing 1 is composed of a cylindrical casing 5, an upper lid 6 for closing an opening of the casing 5, and a lower lid 7.
The compression mechanism 3 is disposed at a lower portion of the housing 5. The motor unit 2 is disposed above the compression mechanism unit 3 inside the casing 5, and is coupled to the compression mechanism unit 3 via the drive shaft 4.
The upper cover 6 is provided with a terminal 8 for supplying electric power to the motor unit 2. An oil groove 9 for storing lubricating oil is formed in the bottom of the sealed container 1.
The motor unit 2 is composed of a stator 10 and a rotor 11. The rotor 11 is fixed to the drive shaft 4 and rotates together with the drive shaft 4. The drive shaft 4 is rotatably supported at both ends thereof by an upper bearing member 12 and a lower bearing member 13.
When the motor unit 2 is biased to rotate the drive shaft 4, the drive shaft eccentric portion 14 of the drive shaft 4 eccentrically rotates in the cylinder 15, and the rolling piston 16 rotates while abutting against a vane (not shown). This repeats the suction and compression of the refrigerant gas. The compression mechanism 3 includes an upper bearing member 12, a lower bearing member 13, a cylinder 15, a rolling piston 16, and a vane (not shown).
A discharge pipe 17 is provided at the upper part of the closed casing 1. The discharge pipe 17 penetrates the upper portion of the upper cover 6, opens into the internal space of the closed casing 1, and functions as a discharge flow path for guiding the refrigerant gas compressed by the compression mechanism 3 to the outside of the closed casing 1. When the compressor is operated, the internal space of the closed casing 1 is filled with the compressed refrigerant.
Further, a suction connection pipe 19 for supplying the refrigerant to the compression mechanism portion 3 is provided at a lower portion of the closed casing 1, and an accumulator 18 for gas-liquid separation of the refrigerant gas is connected to the suction connection pipe 19. The accumulator 18 is configured such that a refrigerant gas introduction pipe 20 is connected to an upper portion thereof, and a refrigerant gas discharge pipe connected to a suction connection pipe 19 is connected to a lower portion thereof.
The structure of the motor unit 2 of the compressor configured as above will be described.
In the motor unit 2, a stator 10 is disposed on an outer periphery of a rotor 11, and the stator 10 is configured by arranging respective divided stator pieces 21 in a circular shape as shown in fig. 4. In this example, each of the divided stator pieces 21 is configured to be circular by annularly connecting both circumferential side portions 21a thereof. Each of the divided stator pieces 21 includes: a yoke 22 connected to the other divided stator pieces 21 in a circular shape to form an outer circumferential portion; and a tooth portion 23 radially protruding from the yoke portion 22. The divided stator blocks 21 are connected by a connection method in which both circumferential side portions 21a of the yoke portion 22 on the outer periphery of the stator are welded (or welded), or by a connection method in which a convex portion and a concave portion are fitted together, as described in patent document 1.
As shown in fig. 7, the stator plates 24 constituting the respective divided stator pieces 21 are formed by press molding the divided stator pieces 21 having the laminated height dimension H (see fig. 4) from the strip-shaped stator material plates 25 in a continuous state. The yoke 22 and the teeth 23 are integrally press-molded by the stator plate portions 24a in the coupled state, and as shown in fig. 7, the coupled portions 26 of the adjacent stator plate portions 24a, that is, both side portions of the yoke 22 are folded as shown in fig. 6 to form the divided stator blocks 21.
As shown in fig. 7, the inner and outer edges of the connecting portion (hereinafter referred to as a folded portion) 26 between the adjacent stator plate portions 24a are formed to have a width M narrower than the width L of the yoke portion 22, and an acute angle recess 27 and an obtuse angle recess 28 are formed to facilitate folding. When split stator pieces 21 are coupled in an annular shape, a plurality of concave grooves 29 are formed to return oil separated from the refrigerant to the lower portion of the sealed container by the adjacent obtuse angle concave portions 28 (see fig. 2). As shown in fig. 7, the yoke portion 22 of the stator plate 24 is provided with an elongated hole 30 in the stator plate folding direction, which serves as a hole for inserting a guide pin (not shown) during the folding process.
In the present embodiment, the thickness of the stator material plate 25, which is a material of the stator plate 24, is 0.1 mm or less. In the present embodiment, a thinner sheet of about several tens of micrometers is used, which is made of an amorphous alloy material or a nanocrystalline soft magnetic material having further improved properties of an amorphous alloy. The nanocrystalline soft magnetic material is a material in which crystal control is performed on the order of 10 nanometers (1 mm per 10 ten thousand) by applying appropriate heat treatment to an inhomogeneous amorphous (noncrystalline) alloy containing α -Fe nuclei obtained by rapidly solidifying a molten Fe-Si-B-P-Cu alloy, thereby improving soft magnetic characteristics. That is, the thickness of the stator plate 24 is 0.1 mm or less, and in the present embodiment, the stator plate 24 is formed of a thin plate made of an amorphous alloy material or a nanocrystalline soft magnetic material, which is thinner by several tens of micrometers.
In the stator 10, reinforcing plates 31, which are formed of electromagnetic steel plates having the same shape as the stator plates 24 and serve as the stator plates 24 and the left and right, are stacked on both upper and lower surfaces of both end surfaces in the stacking direction of the divided stator pieces 21 in the state shown in fig. 3, thereby reinforcing and protecting the surface of the stator 10, and windings 33 are wound and arranged with insulating materials 32 (see fig. 2) interposed therebetween. The winding 33 of the stator 10 is connected to an inverter circuit (not shown) outside the compressor via the terminal 8 (see fig. 1), and generates a magnetic field by energization to drive the rotor 11 at a predetermined rotational speed.
As shown in fig. 8 and 9, the motor unit 2 is provided with annular members 34a and 34b sandwiching the stator 10 at reinforcing plates 31 located at both upper and lower sides of the stator 10. The annular members 34a and 34b are fixed by being thermally attached to the inner circumferential surface of the sealed container 1. That is, the stator 10 of the motor unit 2 is not thermally attached to the sealed container 1 or welded (or welded) thereto, but is fixed to the sealed container 1 with the annular members 34a and 34b interposed therebetween. In the present embodiment, the stator 10 is fixed to the sealed container 1 by heat-fitting the annular members 34a and 34b to the sealed container 1 while slightly pressing the stator 10 from above and below with the annular members 34a and 34b, but the reinforcing plate 31 may be fixed by heat-fitting.
As shown in fig. 10, the outer diameter of the stator plate 24 of the stator 10 of the motor unit 2 is formed smaller than the outer diameters of the annular members 34a and 34b that sandwich and fix the stator 10. In this embodiment, the ring-shaped members 34a and 34b may be made of a material having a coefficient of linear expansion smaller than that of the sealed container 1.
As shown in fig. 9, the annular members 34a and 34b have a pin 36 formed on one of the annular members 34 a. The pin shaft 36 is fitted into the recessed groove 29 on the outer periphery of the stator 10, and serves as a rotation preventing portion for preventing rotation of the rotor 11. The other annular member 34b is provided with a hole 37 into which the pin shaft 36 is fitted.
The fixing of the annular members 34a and 34b to the sealed container 1 is not limited to the fixing to the hot-fill, and welding by laser or the like, or welding after the hot-fill is slightly performed, or the like may be used.
[1-2. actions ]
The operation of the motor configured as described above and the compressor using the same will be described below.
The motor used in the compressor of the present embodiment is configured by forming a plurality of stator plates 24 of the divided stator pieces 21 constituting the stator 10 by press molding in a continuous state, and laminating the stator plates 24 while folding the stator plates 24 at the folding portion 26. Thereby, the stator plates 24 are automatically laminated in a shape-conforming manner (aligned shape). This can reduce the complicated and time-consuming process of stacking and bonding the stator plates 24 that are separated in a dispersed manner when stacking the stator plates 24. That is, as in the conventional technique, a complicated and time-consuming step of stacking and bonding separately dispersed stator plates while conforming their shapes can be eliminated, and the stator plate stacking step can be simplified.
In the present embodiment, since the stator plate 24 is provided with the elongated hole 30 along the stator plate folding direction, a guide pin (not shown) can be fitted into the elongated hole 30 during the folding process. This can reliably suppress slight stacking misalignment of the stator plates 24 that may occur during folding, and can improve the stacking accuracy.
Further, since the stator plate 24 is molded into a shape integrally including the yoke portion 22 and the tooth portions 23, a step of joining the yoke portion 22 and the tooth portions 23 as in the stator plate of the related art can be eliminated, and the stator plate laminating step can be further simplified.
Further, the stator plate 24 having the shape of the yoke 22 and the teeth 23 integrally has a very thin plate thickness of about several tens of micrometers, and a thin plate made of an amorphous alloy material having a small iron loss or a nano-crystal soft magnetic material having further improved amorphous alloy characteristics is used, so that the motor can be highly efficient.
However, although it is difficult to perform press molding of the stator plate 24 having a complicated shape including the yoke 22 and the teeth 23 by using a thin plate made of the above-described amorphous alloy material or nano-crystalline soft magnetic material, the applicant realized the press molding and formed the stator plate 24 having the yoke 22 and the teeth 23 by press molding.
Reinforcing plates 31 are laminated and arranged on both end faces of the divided stator pieces 21 each formed by laminating the stator plates 24 made of the above-described amorphous alloy material or nanocrystalline soft magnetic material, to reinforce and protect the surface of the stator 10, and a winding 33 is wound with an insulating material 32 interposed therebetween. Therefore, the stator plate 24 made of an amorphous alloy material or a nanocrystalline soft magnetic material, which is fragile and thin to about several tens of micrometers, can be prevented from being deformed or cracked. This makes it possible to obtain a motor using an amorphous alloy material sheet or a nanocrystalline soft magnetic material sheet having a small iron loss and a thickness of several tens of micrometers (as thin as about 1/10 in the related art), and to sufficiently secure the effect of increasing the efficiency of the motor.
Further, in the motor unit 2, since the stator 10 is fixed by sandwiching the stator 10 between the annular members 34a and 34b disposed at both end portions of the stator 10 formed by connecting the divided stator pieces 21 and the annular members 34a and 34b are fixed to the sealed container 1 of the compressor by welding or shrink fitting, the stator 10 is not subjected to a strong compression stress as in the case of directly fixing the stator 10 to the sealed container 1 by welding or shrink fitting.
Therefore, even if the stator plate 24 of the stator 10 of the motor 2 is formed of a brittle amorphous alloy material or a nanocrystalline soft magnetic material and is a sheet-like thin plate having a thickness of about several tens of micrometers, it is possible to prevent the stator plate 24 from being deformed to cause a decrease in the efficiency of the motor 2. Further, it is not necessary to adjust the laser irradiation time and the heat amount required for welding, and it is possible to prevent a decrease in efficiency due to variations in these adjustments.
The outer diameter of the stator 10 is smaller than the outer diameters of the annular members 34a and 34b that sandwich and fix the stator 10. Therefore, the annular members 34a and 34b receive the compressive stress in the diameter reduction direction generated by the thermal contraction of the sealed container 1, and the compressive stress applied to the stator 10 of the motor unit 2 can be suppressed or eliminated.
This can prevent stress damage to the stator plate 24 of the stator 10, and can provide a high-performance compressor that can sufficiently exhibit the performance efficiency of the amorphous alloy material or the nanocrystalline soft magnetic material.
Although the stator plate 25 made of the amorphous alloy material or the nanocrystalline soft magnetic material is expensive, as is clear from fig. 7, the stator plate 24 can be taken out from the bar-shaped stator plate 25 without waste by performing press molding so that the teeth 23 face each other (face to face). For example, if the stator 10 is not formed by dividing the stator pieces 21 but is formed continuously in a single annular shape, the stator plate 24 forming the stator is formed in an annular shape (ring shape), and the material in the central portion of the ring is discarded, which results in a large waste in taking out the material. However, if the stator 10 is formed as a coupled body of the divided stator pieces 21, the stator plates 24 constituting the stator are arranged so that the teeth 23 of the stator plates 24 face each other as described above, and are molded. This can almost eliminate waste of material, and significantly suppress an increase in the manufacturing cost of the stator 10.
The pin shaft 36 of the one annular member 34a provided in the compressor is fitted in the concave groove 29 on the outer periphery of the stator 10. Therefore, even if the stator 10 of the motor unit 2 is not fixed by shrink fitting, welding, or the like, the rotation of the stator 10 can be prevented, and a high-performance compressor can be obtained while suppressing a decrease in efficiency.
[1-3. effects, etc. ]
As described above, the motor disclosed in the present embodiment includes the rotor 11 and the stator 10 for rotating the rotor 11, the stator 10 is configured by coupling a plurality of divided stator pieces 21, and the divided stator pieces 21 are formed by folding and laminating a plurality of stator plates 24, which are continuously coupled to integrally include the yoke portion 22 and the tooth portion 23.
Accordingly, when the stator plates 24 are laminated, it is possible to reduce the complicated and time-consuming process of aligning and laminating and bonding the shapes of the respective dispersedly separated stator plates 24, and it is also possible to eliminate the need for the process of joining the yoke portion 22 and the tooth portion 23 when forming the stator plates 24. Therefore, the lamination process can be greatly simplified, the manufacturing cost can be reduced, and an inexpensive motor and a compressor using the same can be configured.
In the above configuration, at least a part of the stator plates 24 constituting the divided stator pieces 21 is formed of a thin plate made of an amorphous alloy material or a nanocrystal material, or the whole stator plates 24 are formed of a thin plate, so that it is possible to reduce the manufacturing cost and to form a high-performance motor and a compressor using the motor at low cost.
In each of the above configurations, the stator plate 24 is formed with the elongated hole 30 provided in the stator plate folding direction at an appropriate position of each stator plate 24. Therefore, the lamination shift of the daughter board can be suppressed by a simple method.
(embodiment mode 2)
Fig. 11 is a vertical sectional view showing a motor unit of a compressor according to embodiment 2.
[2-1. Structure ]
The compressor of the present embodiment is configured such that at least one of the annular members 34a and 34b is replaced with a stepped portion integrally formed on the inner peripheral surface of the closed casing 1.
That is, the following structure is adopted: an annular step portion 1a is integrally formed at a lower portion of the closed casing 1, a lower end portion of the stator 10 of the motor unit 2 is placed on the step portion 1a, an annular member 34a is inserted into an upper end portion side of the stator 10, and the closed casing 1 is fixed by being thermally mounted in a state where the stator 10 is slightly pressed against the step portion 1 a.
[2-2. actions, effects, etc. ]
The motor according to the present embodiment configured as described above can obtain the same operational effects as those of embodiment 1 described above, and can further obtain the following effects.
That is, in the present embodiment, the stator 10 of the motor unit 2 is fixed by being sandwiched between the step portion 1a provided on the inner peripheral surface of the sealed container and the annular member 34a fixed to the inner peripheral surface. Therefore, one ring-shaped member fixed to the closed casing 1 can be eliminated, and the production rate and the production cost can be further improved.
(embodiment mode 3)
Fig. 12 is a plan view of a stator element plate forming a stator of a compressor according to embodiment 3, fig. 13 is a perspective view of the stator formed by laminating stator plates compression-molded from the stator element plate according to embodiment 3, and fig. 14 is a plan view (plan view) showing a state in which the stator is fixed to a hermetic container of the compressor by hot-fitting according to embodiment 3.
[3-1. Structure ]
In the compressor of the present embodiment, the stator 10 is directly fixed to the hermetic container 1 by heat-sealing without using the annular members 34a and 34 b.
That is, the following structure is adopted: in the case where the stator plate 24 is formed by laminating the minute protrusions 38 protruding outward from the outermost peripheral edge of the yoke 22 on the outer edge side of the folded portion 26 of the stator plate 24 press-molded from the stator material plate 25, the minute protrusions 38 protruding from the outer peripheral surface of the divided stator block 21 shown in fig. 13 are fixed to the closed casing 1 by heat-sealing as shown in fig. 14.
The minute projection 38 need not be formed on all of the divided stator pieces 21, but may be formed on several divided stator pieces 21.
[3-2. actions, effects, etc. ]
The compressor of the present embodiment configured as described above does not need to use the annular members 34a and 34b described in embodiment 1. Further, since the minute projections 38 provided in the folded portion 26 are improved in strength by work hardening, deformation and the like can be suppressed even when a compression pressure is applied from the hermetic container 1. Since the minute projections 38 are positioned at a part of both side portions of the yoke 22, even if there is some deformation or the like, the influence on the magnetic characteristics of the entire yoke is small. This reduces deterioration of magnetic characteristics due to the compression pressure from the sealed container 1, and can suppress a decrease in efficiency of the motor and promote simplification of the structure.
(other embodiments)
As described above, embodiments 1, 2, and 3 have been described as an example of the technique described in the present invention. However, the technique of the present invention is not limited to this, and can be applied to an embodiment in which a change, a replacement, an addition, an omission, or the like is made.
For example, the motor is described as an inner rotor type motor, but an outer rotor type motor may be used.
The stator plates 24 of the divided stator pieces 21 constituting the stator 10 are formed of an amorphous alloy material or a nano-crystal soft magnetic material, but they may be formed of electromagnetic steel sheets or the like, and the lamination process can be simplified by folding and laminating the stator plates formed of electromagnetic steel sheets or the like.
In the present embodiment, a structure in which stator plates 24 formed of electromagnetic steel plates are folded and laminated at both end surfaces of the stator plates formed of an amorphous alloy material or a nanocrystalline soft magnetic material, that is, a combined structure of stator plates 24 formed of an amorphous alloy material or a nanocrystalline soft magnetic material and stator plates 24 formed of electromagnetic steel plates, is described. However, the stator 10 may be formed only with the stator plate 24 formed of an amorphous alloy material or a nanocrystalline soft magnetic material. In the case where the stator plates 24 made of electromagnetic steel plates are used together, the stator plates 24 made of amorphous alloy material or nanocrystalline soft magnetic material may be laminated together in the lamination process of the electromagnetic steel plates.
Further, although the compressor has been described as having a rotary compression mechanism, the compressor may be a scroll type, reciprocating type, screw type compressor, or the like, and may be applied to compressors of various compression systems.
That is, the embodiments described in the present specification are all exemplified and not limited, and the scope of the present invention is indicated by the scope of the claims, and includes all changes within the meaning and scope equivalent to the scope of the claims.
Industrial applicability
As described above, according to the present invention, since the lamination process of the divided stator pieces constituting the stator can be greatly simplified, the manufacturing cost can be reduced, and an inexpensive motor and a compressor using the same can be provided. Therefore, the present invention can be used as a compressor of a refrigeration system or a motor for driving a compressor of various devices such as an air conditioner, a refrigerator, a blower, and a water heater.
Description of reference numerals
1 closed container
1a step part
2 Motor part (Motor)
3 compression mechanism part
4 drive shaft
5 casing
6 Upper cover
7 lower cover
8 terminal
9 oil groove
10 stator
11 rotor
12 upper bearing component
13 lower bearing component
14 drive shaft eccentric part
15 air cylinder
16 rolling piston
17 discharge pipe
18 reservoir
19 suction connecting pipe
20 refrigerant gas introduction pipe
21-segment stator block
21a circumferential both side parts (circumferential both side parts)
22 yoke
23 tooth system
24 stator plate
24a stator plate section
25 stator material plate
26 connecting part (folding part)
27 acute angle recess
28 obtuse angle recess
29 concave groove
30 long hole
31 reinforcing plate
32 insulating material
33 winding
34a, 34b annular member
36 pin shaft
37 holes
38 are minute projections.
Claims (7)
1. An electric motor including a rotor and a stator that rotates the rotor, the stator being configured by arranging a plurality of divided stator pieces in a circular shape, characterized in that:
the divided stator blocks are formed by folding and laminating a plurality of continuously connected stator plates integrally having a yoke portion and a tooth portion,
the yoke portion is arranged in a circular shape in contact with the other divided stator pieces,
the tooth portion protrudes in a radial direction from the yoke portion.
2. The motor of claim 1, wherein:
at least a part of the plurality of stator plates constituting the divided stator pieces or all of the stator plates are formed of a thin plate of an amorphous alloy material or a nano-crystal material.
3. The motor according to claim 1 or 2, wherein:
the stator plates are provided with long holes at appropriate positions of the respective stator plates in a stator plate folding direction.
4. A compressor in which a compression mechanism part and a motor part for driving the compression mechanism part are housed in a sealed container, characterized in that:
the stator of the motor unit is the stator of the motor according to any one of claims 1 to 3.
5. The compressor of claim 4, wherein:
the stator plate constituting the stator is provided with a minute protrusion protruding outward from an outermost peripheral edge of the yoke at a folded portion of the stator plate.
6. A compressor as claimed in claim 4 or 5, wherein:
fixing plates made of electromagnetic steel plates are disposed on both end surfaces of the stator, which is configured by magnetically coupling the divided stator pieces made of the amorphous alloy material or the nanocrystalline material, and at least a part of an outer diameter of the fixing plates or the outer diameter is larger than an outermost peripheral outer diameter of the stator made of the amorphous alloy material or the nanocrystalline material.
7. The compressor as set forth in claim 6, wherein:
at least one of the fixing plates is replaced with a stepped portion provided on an inner circumferential surface of the hermetic container.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-219215 | 2019-12-04 | ||
| JP2019219215 | 2019-12-04 | ||
| PCT/JP2020/035765 WO2021111708A1 (en) | 2019-12-04 | 2020-09-23 | Electric motor and compressor using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114731073A true CN114731073A (en) | 2022-07-08 |
Family
ID=76220999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080083207.3A Pending CN114731073A (en) | 2019-12-04 | 2020-09-23 | Motor and compressor using the same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7486082B2 (en) |
| CN (1) | CN114731073A (en) |
| WO (1) | WO2021111708A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62129276U (en) * | 1986-02-05 | 1987-08-15 | ||
| JP2888142B2 (en) * | 1993-11-08 | 1999-05-10 | 三菱電機株式会社 | Rotary motor and method of manufacturing the same |
| JP5896937B2 (en) * | 2013-02-08 | 2016-03-30 | 三菱電機株式会社 | Divided iron core, stator using the divided iron core, and rotating electric machine equipped with the stator |
| JP6131791B2 (en) * | 2013-09-06 | 2017-05-24 | 株式会社デンソー | Method for manufacturing stator core of rotating electric machine |
| CN106208428B (en) * | 2015-05-27 | 2020-08-04 | 德昌电机(深圳)有限公司 | Motor magnetic core and manufacturing method thereof |
-
2020
- 2020-09-23 CN CN202080083207.3A patent/CN114731073A/en active Pending
- 2020-09-23 WO PCT/JP2020/035765 patent/WO2021111708A1/en active Application Filing
- 2020-09-23 JP JP2021562466A patent/JP7486082B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP7486082B2 (en) | 2024-05-17 |
| JPWO2021111708A1 (en) | 2021-06-10 |
| WO2021111708A1 (en) | 2021-06-10 |
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