WO2020261467A1 - Noyau de stator, stator, moteur électrique, et compresseur - Google Patents

Noyau de stator, stator, moteur électrique, et compresseur Download PDF

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Publication number
WO2020261467A1
WO2020261467A1 PCT/JP2019/025528 JP2019025528W WO2020261467A1 WO 2020261467 A1 WO2020261467 A1 WO 2020261467A1 JP 2019025528 W JP2019025528 W JP 2019025528W WO 2020261467 A1 WO2020261467 A1 WO 2020261467A1
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WO
WIPO (PCT)
Prior art keywords
stator core
steel plate
stator
connecting steel
compressor
Prior art date
Application number
PCT/JP2019/025528
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English (en)
Japanese (ja)
Inventor
一弥 熊谷
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2021528769A priority Critical patent/JP7150174B2/ja
Priority to PCT/JP2019/025528 priority patent/WO2020261467A1/fr
Publication of WO2020261467A1 publication Critical patent/WO2020261467A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit

Definitions

  • the present invention relates to a stator core composed of a connected laminated iron core, a stator equipped with the stator, an electric motor provided with the stator, and a compressor provided with the electric motor.
  • a stator of a centralized winding DC brushless motor for a compressor is used by being shrink-fitted in a closed container constituting the outer shell of the compressor, but it is known that iron loss is exacerbated by stress due to shrink-fitting. ..
  • iron loss is exacerbated by stress due to shrink-fitting. ..
  • the shrink fitting gripping force generated between the stator and the closed container due to the decrease in the shrink fitting gripping force generated between the stator and the closed container, the holding torque between the stator and the closed container and the pull-out load of the stator on the closed container are reliable. The shortage becomes an issue.
  • stator heat caulking is used to improve the holding torque and pull-out load between the stator and the airtight container by heating the outer periphery of the airtight container and caulking the stator and the stator in the circumferential direction.
  • the compressor manufactured by the stator heat caulking method improves the shrinkage gripping force between the stator and the closed container.
  • the compressor manufactured by this method secures a shrinkage fitting allowance of 0 or more from the viewpoint of diverting the current production equipment, and reduces the shrinkage fitting allowance between the stator and the closed container.
  • the shrinkage fitting allowance that can be reduced is limited by the variation in the dimensions of the inner diameter of the closed container and the outer diameter of the stator.
  • the present invention solves the above-mentioned problems, reduces the shrinkage fitting allowance by reducing the variation in the shrinkage fitting allowance between the stator and the closed container, and improves efficiency by reducing the shrinkage fitting allowance.
  • a stator core a stator having the stator core, an electric motor having the stator, and a compressor having the electric motor.
  • the stator core according to the present invention is a cylindrical stator core that is shrink-fitted and crimped into a closed container that constitutes the housing of the compressor, and has a back yoke portion and a back that form the outer peripheral wall of the stator core. It has a teeth portion protruding from the yoke portion, includes a plurality of divided iron cores rotatably connected and arranged in an annular shape, and the plurality of divided iron cores are a plurality of all M divided iron cores constituting an N-phase structure.
  • the plurality of divided iron cores have a P-phase divided iron core having a first contact portion that contacts the inner peripheral wall of the closed container, and a total of M plurality of divided iron cores are provided in the first contact portion. It has an outer peripheral wall that is N / P times thicker than the shrink fitting allowance when all of the iron core is in contact with the inner peripheral wall.
  • the stator according to the present invention is provided with a stator core having the above configuration and a winding wound around the teeth portion via an insulating material.
  • the electric motor according to the present invention includes a stator having the above configuration and a rotor rotatably arranged inside the inner surface of the stator.
  • the compressor according to the present invention is provided with an electric motor having the above configuration.
  • stator core in comparison with the shrink fitting allowance when all the M divided iron cores are in contact with the inner peripheral wall at the contact points with the closed container. It has an outer peripheral wall that is N / P times thicker and serves as a shrink fitting allowance. Further, the stator core is shrink-fitted and crimped into a closed container constituting the housing of the compressor.
  • the stator core or the like according to the present invention has such a configuration, and when the required shrinkage stress is equal to the shrinkage stress of the conventional stator core, the variation in shrinkage stress is set to P / N. be able to.
  • the reduction in the variation in the shrinkage of the shrinkage can be applied to the reduction of the shrinkage, and the increase in iron loss due to the shrinkage stress can be suppressed to improve the efficiency. it can.
  • FIG. It is a vertical sectional view of the compressor which concerns on Embodiment 1.
  • FIG. It is a top view of the stator which concerns on Embodiment 1.
  • FIG. It is a top view of the stator core which constitutes the stator according to Embodiment 1.
  • FIG. It is a top view of the electromagnetic steel plate which constitutes a part of a divided iron core.
  • It is a top view of the electromagnetic steel plate which constitutes a part of a divided iron core.
  • It is a top view of the connecting steel plate of the comparative example in which the heat caulking groove and the slit in the right direction are formed.
  • FIG. 5 is a plan view of another connecting steel plate according to the first embodiment in which a heat caulking groove and a slit in the left direction are formed. It is a figure which compared the structure and performance of the compressor of Embodiment 1 and the conventional compressor. It is a figure which showed the relationship between the shrinkage stress and the motor performance of the compressor of Embodiment 1 and the conventional compressor based on FIG.
  • FIG. It is a side view of the position of the contact portion in the stator core of the compressor which concerns on Embodiment 1.
  • FIG. It is a conceptual diagram explaining the stator of the compressor which concerns on Embodiment 1.
  • FIG. It is another conceptual diagram explaining the stator of the compressor which concerns on Embodiment 1.
  • FIG. It is a block diagram of the compressor which concerns on Embodiment 1 and the compressor which concerns on Embodiment 2.
  • FIG. 1 is a vertical sectional view of the compressor 100 according to the first embodiment.
  • the compressor 100 which is a closed type compressor, will be described with reference to FIG.
  • the compressor 100 is a rolling piston type single rotary compressor, and is a fluid machine that discharges a low-pressure gas refrigerant sucked into the compressor 100 as a high-pressure gas refrigerant.
  • the housing of the compressor 100 is composed of an iron closed container 101 formed in a cylinder shape.
  • the closed container 101 is composed of an upper container 101a having an inverted U-shaped vertical cross section and a lower container 101b having a U-shaped vertical cross section, and the outer surface of the opening of the upper container 101a is the lower container 101b. It is fixed to the inner surface of the opening.
  • the fixed portion between the upper container 101a and the lower container 101b is joined by, for example, arc welding or resistance welding.
  • the suction muffler 127 is arranged on the outside of the closed container 101.
  • the suction muffler 127 is fixed to the closed container 101 via a support member arranged on the outer surface of the closed container 101.
  • An inflow pipe 127a is fixed to the top of the suction muffler 127 through the suction muffler 127.
  • the inflow pipe 127a is a refrigerant pipe that allows a low-pressure gas refrigerant or a highly dry two-phase refrigerant to flow into the suction muffler 127.
  • suction connecting pipe 128 penetrates and is fixed to the bottom of the suction muffler 127, and the other end of the suction connecting pipe 128 penetrates and is fixed to the side surface of the lower container 101b of the closed container 101. ..
  • the suction muffler 127 is connected to the cylinder 105 of the compression mechanism unit 103 by the suction connecting pipe 128.
  • the suction muffler 127 is a muffler that reduces or eliminates noise generated by the refrigerant flowing in from the inflow pipe 127a.
  • the suction muffler 127 also has an accumulator function, and has a refrigerant storage function for storing excess refrigerant and a gas-liquid separation function for temporarily retaining liquid refrigerant generated when the operating state changes. Have.
  • the gas-liquid separation function of the suction muffler 127 can prevent a large amount of liquid refrigerant from flowing into the closed container 101 and causing liquid compression by the compressor 100.
  • a discharge pipe 129 penetrates and is fixed to the upper surface side of the upper container 101a constituting the closed container 101.
  • the discharge pipe 129 is a refrigerant pipe that discharges a high-pressure gas refrigerant to the outside of the closed container 101.
  • the fixed portion between the discharge pipe 129 and the upper container 101a is joined by, for example, brazing or resistance welding.
  • a glass terminal 119 is provided on the upper surface side of the upper container 101a constituting the closed container 101.
  • the glass terminal 119 provides an interface connected to an external power source.
  • the external power supply is a power supply device that supplies electric power to the compressor 100, and a general commercial AC power supply having an AC frequency of 50 Hz or 60 Hz, or an inverter power supply capable of changing the AC frequency is used.
  • an inverter power supply whose frequency can be changed is used, the rotation speed of the compressor 100 can be changed, so that the compressor 100 can control the discharge amount of the high-pressure gas refrigerant from the discharge pipe 129.
  • the electric motor unit 102, the compression mechanism unit 103, and the shaft 104 are housed inside the closed container 101. Inside the closed container 101, the electric motor unit 102 is arranged above the compression mechanism unit 103.
  • the shaft 104 is arranged between the electric motor unit 102 and the compression mechanism unit 103 at the center of the closed container 101, and is provided so as to extend in the vertical direction between the electric motor unit 102 and the compression mechanism unit 103.
  • the compression mechanism unit 103 is arranged so that the inside of the compression mechanism unit 103 communicates with the suction connecting pipe 128.
  • the hollow space inside the closed container 101 is filled with a high-pressure gas refrigerant compressed by the compression mechanism unit 103.
  • the electric motor unit 102 is an electric motor for a compressor arranged in the closed container 101.
  • the electric motor unit 102 is configured as a motor that generates a rotational driving force on the shaft 104 using electric power supplied from an external power source and transmits the rotational driving force to the compression mechanism unit 103 via the shaft 104.
  • the electric motor unit 102 includes a stator 1 having a hollow cylindrical appearance when viewed from above, and a cylindrical rotor 5 rotatably arranged inside the inner side surface of the stator 1.
  • the stator 1 is fixed to the inner surface of the lower container 101b of the closed container 101 by shrink fitting or the like, and is connected to the glass terminal 119 via the lead wire 9.
  • the electric motor unit 102 the electric power supplied from the external power source is supplied to the wound coil constituting the stator 1 via the lead wire 9, so that the rotor 5 is inside the inner surface of the stator 1. Can be rotated.
  • a DC brushless motor or the like is used as the electric motor unit 102.
  • the stator core 200 constituting the stator 1 has an outer diameter larger than the inner diameter of the lower container 101b, and is shrink-fitted and fixed to the lower container 101b. The detailed configuration of the stator 1 will be described later.
  • the rotor 5 is arranged at both ends of the rotor core 5A in which the magnet insertion hole 24A and the refrigerant flow path 23 are formed and the rotor core 5A in the axial direction, and also serves to prevent the permanent magnet 24 from scattering. It also has an upper balance weight 25a and a lower balance weight 25b. Further, the rotor 5 includes an upper balance weight 25a, a lower balance weight 25b, and a rivet 26 for fixing the rotor core 5A.
  • the rotor core 5A is configured by laminating a rotor core sheet formed by punching a thin electromagnetic steel plate in the same manner as the stator core 200.
  • the rotor core 5A is fixed to the upper shaft 104a located above the compression mechanism 103 on the shaft 104 by shrink fitting. Therefore, the inner diameter of the rotor core 5A is smaller than the outer diameter of the shaft 104.
  • the upper balance weight 25a is arranged at the upper end of the rotor core 5A in the compressor 100.
  • the lower balance weight 25b is arranged at the lower end of the rotor core 5A in the compressor 100.
  • the rotor 5 may be provided with end plates arranged at both ends in the axial direction of the rotor core 5A.
  • the rivet 26 is inserted into the rivet hole 26A formed continuously in the rotor core 5A, the upper balance weight 25a, and the lower balance weight 25b.
  • the refrigerant flow path 23 formed in the rotor 5 guides the refrigerant gas discharged from the compression mechanism unit 103 to the upper part of the closed container 101, and also guides the refrigerating machine oil guided to the upper part of the closed container 101 together with the refrigerant gas into the closed container. It has a role of dropping to the lower part of 101. Further, between the stator 1 and the closed container 101, there is a space that communicates the upper part and the lower part of the closed container 101 and has the same role as the refrigerant flow path 23.
  • a shaft 104 penetrates the rotor 5 and is fixed to the center of the rotor 5.
  • the shaft 104 is a rotating shaft that transmits the rotational driving force of the rotor 5 to the compression mechanism unit 103.
  • the shaft 104 has an eccentric portion 104b arranged at a position corresponding to the cylinder 105 inside the compression mechanism portion 103.
  • a substantially cylindrical rolling piston 109 rotatably attached along the outer surface of the eccentric portion 104b is arranged on the outer periphery of the eccentric portion 104b.
  • the compression mechanism unit 103 compresses the low-pressure gas refrigerant sucked into the low-pressure space of the closed container 101 from the suction connecting pipe 128 into the high-pressure gas refrigerant by the rotational driving force supplied from the electric motor unit 102, and compresses the high-pressure gas refrigerant.
  • the gas refrigerant is discharged above the compression mechanism unit 103.
  • the compression mechanism unit 103 includes a hollow cylindrical cylinder 105.
  • the outer surface of the cylinder 105 is fixed to the inner surface of the lower container 101b of the closed container 101 by arc welding such as arc spot welding or shrink fitting.
  • the eccentric portion 104b of the shaft 104 and the rolling piston 109 are housed in the space of the hollow portion surrounded by the inner side surface of the cylinder 105.
  • the cylinder 105 is configured so that the eccentric portion 104b of the shaft 104 and the rolling piston 109 can rotate eccentrically by the rotation of the shaft 104 in the hollow portion of the cylinder 105.
  • a compression chamber is formed by abutting one end of a vane 110 that reciprocates in the groove formed in the cylinder 105 in the radial direction with the outer peripheral wall of the rolling piston 109.
  • the openings at both ends of the cylinder 105 in the axial direction are closed by the upper bearing 106 and the lower bearing 107. That is, the upper bearing 106 is arranged on the upper side of the cylinder 105, and the lower bearing 107 is arranged on the lower side of the cylinder 105.
  • a shaft 104 penetrates the upper bearing 106, the cylinder 105, and the lower bearing 107.
  • the upper bearing 106 and the lower bearing 107 are slide bearings that slidably support the shaft 104, and rotatably support the shaft 104.
  • the upper bearing 106, the cylinder 105, and the lower bearing 107 are laminated in this order, and the upper and lower openings of the hollow portion of the cylinder 105 are closed by the upper bearing 106 and the lower bearing 107 to ensure airtightness in the hollow portion. ..
  • the upper bearing 106 and the lower bearing 107 are fixed to the upper side and the lower side of the cylinder 105 by, for example, bolts or the like.
  • a silencer 108 that removes or reduces noise generated when the refrigerant in the compression mechanism 103 is compressed can be arranged.
  • the silencer 108 may be provided with an opening 108a for discharging the high-pressure gas refrigerant flowing from the discharge port (not shown) provided in the upper bearing 106 into the closed container 101.
  • the airtight space surrounded by the rolling piston 109, the cylinder 105, the vane 110, the upper bearing 106, and the lower bearing 107 compresses the low-pressure gas refrigerant sucked from the suction connecting pipe 128. Make up the room.
  • the compressor 100 is configured as a vertical compressor, but it may be configured as a horizontal compressor. Further, in the present embodiment, the compressor 100 is configured as a rolling piston type rotary compressor, but is configured as a swing vane type swing compressor, a screw compressor, a reciprocating compressor, or a scroll compressor. You may. Further, in the present embodiment, it is configured as a single rotary type rotary compressor, but it may be configured as a twin rotary type rotary compressor. The compressor 100 may have any compression structure as long as the electric motor portion 102 is a closed type compressor 100 arranged in the closed container 101.
  • the low-pressure gas refrigerant that has flowed into the inside of the compression chamber is compressed into the high-pressure gas refrigerant as the volume of the compression chamber decreases due to the eccentric rotation of the rolling piston 109.
  • the high-pressure gas refrigerant is discharged into the hollow space inside the closed container 101 outside the compression mechanism portion 103 through the discharge port provided in the upper bearing 106.
  • the high-pressure gas refrigerant discharged into the hollow space inside the closed container 101 passes through, for example, a gap between the stator 1 and the rotor 5 of the electric motor unit 102, and passes through the discharge pipe 129 to the closed container 101. It is discharged to the outside of.
  • FIG. 2 is a plan view of the stator 1 according to the first embodiment. As shown in FIGS. 1 and 2, the stator 1 has a stator core 200 and a winding 4 arranged on the stator core 200 via an insulating material 3.
  • FIG. 3 is a plan view of the stator core 200 constituting the stator 1 according to the first embodiment.
  • the outer diameter of the stator core 200 is larger than the inner diameter of the closed container 101, and the stator core 200 is fixed by being shrink-fitted onto the inner peripheral wall 101e of the closed container 101. Further, the stator core 200 is caulked into the airtight container 101 by thermal caulking performed from the outer diameter side of the airtight container 101.
  • the stator core 200 is formed in a cylindrical shape.
  • the stator core 200 is formed by arranging a plurality of divided cores 120 in the circumferential direction. That is, the stator core 200 is formed in a cylindrical shape by arranging a plurality of divided iron cores 120 in the circumferential direction. In FIGS. 1 and 3, a total of nine split cores 120 are arranged in an annular shape, but if the stator core 200 can be configured in an annular shape, the total number of the split cores 120 may be 8 or less. It may be more than one.
  • the plurality of divided iron cores 120 are connected to each other to form a series.
  • the split iron core 120 has a back yoke portion 20a and a teeth portion 20b.
  • the back yoke portion 20a constitutes the outer peripheral wall 1a of the stator core 200, and constitutes a cylindrical peripheral wall in the stator core 200.
  • the adjacent split iron cores 120 are connected by connecting the back yoke portions 20a to each other.
  • the tooth portion 20b projects from the central portion in the circumferential direction toward the center side of the stator core 200 on the inner peripheral side of the back yoke portion 20a, and is formed in a substantially T shape.
  • the tooth portion 20b has a shape that extends inward in the radial direction with a constant width from the root and widens at the tip.
  • a winding 4 is wound in a concentrated winding through an insulating material 3 in a portion of the teeth portion 20b formed to a certain width.
  • the split iron core 120 has abutting portions 120a and end face portions 120b at both ends in a direction perpendicular to the teeth portion 20b, that is, in the circumferential direction of the back yoke portion 20a.
  • the stator core 200 is formed in an annular shape by rotatably connecting the divided cores 120 formed in a series and arranging them in an annular shape, and fixing the divided cores 120 located at both ends to each other by welding.
  • FIG. 4 is a plan view of the electromagnetic steel plate 20 forming a part of the divided iron core 120.
  • FIG. 5 is a plan view of the electromagnetic steel plate 20 forming a part of the divided iron core 120.
  • FIG. 6 is an enlarged plan view of the stator core 200 at the welding position between the divided iron cores 120.
  • the electromagnetic steel plate 20 of FIG. 4 and the electrical steel plate 20 of FIG. 5 differ only in the direction of the slit formed in the stator core 200, and have the same basic structure.
  • the slit is formed by the edge portion of the abutting portion 120a.
  • the slit is formed in the stator core 200 so as to extend in the radial direction, and the central portion in the radial direction is formed to be convex in the circumferential direction.
  • the slit of the orientation of the slit of the electromagnetic steel sheet 20 of FIG. 4 is rightward in the circumferential direction, and the orientation of the slit of the electrical steel sheet 20 of FIG. 5 is leftward in the circumferential direction.
  • the electromagnetic steel sheet 20 is a steel sheet laminated in the divided steel core 120.
  • the electromagnetic steel sheet 20 is, for example, a plate material of a magnetic material containing iron as a main component, and is formed by punching into a specific shape.
  • thin electromagnetic steel plates 20 are overlapped and crimped in the laminating direction at the caulking portion 123 to fix the electromagnetic steel plates 20 to each other.
  • An insulating member (not shown) is fixed to the axial end face of the divided iron core 120 composed of the stacked electromagnetic steel plates 20.
  • An insulator insertion groove 125 is formed in the back yoke portion 20a of the electromagnetic steel plate 20. A protrusion provided on the insulating member is inserted into the insulator insertion groove 125, and the insulating member is locked to the split iron core 120.
  • the electromagnetic steel sheet 20 has a joint portion 121 at one end in the circumferential direction when the stator core 200 is configured in the back yoke portion 20a.
  • the joint portion 121 is formed by, for example, caulking, and the split iron core 120 is rotatably supported around the joint portion 121.
  • the split core 120 is connected to the adjacent split core 120 via a joint portion 121. It is known that the structure of the joint portion 121 is used for the stator core 200 formed by laminating an electromagnetic steel sheet 20 for each of the divided cores 120 of the stator core 200 and connecting the divided iron cores 120.
  • the electrical steel sheet 20 has abutting portions 120a and end face portions 120b at both ends in a direction perpendicular to the longitudinal direction of the teeth portion 20b, that is, in the circumferential direction of the back yoke portion 20a.
  • the abutting portion 120a and the end face portion 120b are fitted and abutted.
  • the joint portion 121 of the electromagnetic steel sheet 20 has been referred to as a joint wrap structure of the stator core 200.
  • a welding groove 131 is formed on the outer peripheral wall 1a of the stator core 200.
  • the contact portion 132 is located at both ends of the plurality of divided iron cores 120 connected to each other, and is a portion where the divided iron cores 120 joined by welding are brought into contact with each other.
  • the welding groove 131 is formed so as to be recessed toward the inner peripheral wall 20d on the side where the teeth portion 20b is formed at the outer edge portion 20c of the electromagnetic steel plate at the end portion of the back yoke portion 20a constituting the contact portion 132. It is a groove.
  • the electromagnetic steel plate 20 has a pair of protruding portions 122 on the outer edge portion 20c of the back yoke portion 20a.
  • the outer edge portion 20c is a peripheral edge portion of the back yoke portion 20a and constitutes the outer peripheral wall 1a of the stator core 200.
  • the protruding portion 122 is provided at a position on the back yoke portion 20a opposite to the teeth portion 20b.
  • the protruding portion 122 of the divided iron core 120 that contacts the inner peripheral wall 101e of the closed container 101 among the plurality of divided iron cores 120 is the first contact portion among the portions that come into contact with the closed container 101, and is shrink-fitted to the closed container 101. Make up the cost.
  • the shrink fitting allowance is the difference between the outer diameter of the stator core 200 before heating and the inner diameter of the closed container 101.
  • the protruding portion 122 is a portion that protrudes as compared with a virtual perfect circle centered on the center O formed by the outer edge portion of the back yoke portion 20a.
  • the thickness of the shrink fitting allowance is adjusted by the distance between the center O of the stator core 200, which will be described later, and the outer edge of the protrusion 122. More specifically, in the stator core 200, the thickness of the shrink fitting allowance is adjusted by the radial distance from the center O to the outer edge portion of the protruding portion 122.
  • the projecting portion 122 is a projecting piece formed on the outer edge portion 20c, and two projecting portions 122 are formed on the outer edge portion 20c in the circumferential direction.
  • the protruding shape of the protruding portion 122 is formed by a heat caulking groove 124 formed on the outer side of the two protruding portions 122 in the circumferential direction and a central groove 126 formed between the two protruding portions 122.
  • the heat caulking groove 124 and the central groove 126 are grooves formed in the outer edge portion 20c so as to be recessed toward the inner peripheral wall 20d on the side where the teeth portion 20b is formed.
  • the heat caulking groove 124 is formed so as to be recessed toward the inner diameter side in the outer peripheral wall 1a of the stator core 200.
  • the heat caulking groove 124 fits with the airtight container 101 that has entered the heat caulking groove 124 with respect to the heat caulking performed from the outer diameter side of the airtight container 101.
  • the stator core 200 of the compressor 100 according to the first embodiment has a heat caulking groove 124, and is heated from the outer diameter side of the closed container 101 and caulked to restrict movement in the circumferential direction and the axial direction.
  • the circumferential direction and the axial direction are the circumferential direction and the axial direction of the stator 1 or the stator core 200, and the axial direction is also the stacking direction of the electromagnetic steel sheets 20 described later.
  • the stator core 200 has at least one phase of the split iron core 120 in which the heat caulking groove 124 is formed on the outer peripheral wall 1a.
  • the stator core of the joint wrap structure with the conventional joint part has a contact part constituting the shrink fitting allowance and a heat caulking groove, so that it is connected to the closed container in the circumferential direction.
  • the stator core constituting the stator improves the gripping force acting on the outer peripheral wall and the inner peripheral wall of the closed container, the holding torque between the stator and the closed container, and the removal of the stator with respect to the closed container. It is possible to improve the load.
  • the contact area between the outer peripheral wall of the stator and the closed container is reduced compared to the conventional method so that the shrinkage stress is concentrated in the place where the magnetic flux density is low during operation, and the outer peripheral shape of the stator is changed. This makes it possible to improve the performance of the compressor.
  • the inner diameter of the inner wall of the closed container and the outer diameter of the outer wall of the stator vary during manufacturing. Therefore, when aiming to improve performance by reducing the shrinkage fitting allowance and shrinkage fitting stress by the amount of improvement in holding torque and release load due to thermal caulking, when the shrinkage fitting allowance is set to 0 or more when the conventional process is diverted. Will cause manufacturing restrictions on the reduction of shrinkage fitting allowance. Further, even if the manufacturing restrictions on the reduction of the shrink fitting allowance can be reduced due to the variation in the manufacturing time of the inner diameter dimension of the inner peripheral wall of the closed container and the outer diameter dimension of the outer peripheral wall of the stator. The following problems may occur.
  • the rigidity of the stator core may decrease due to the decrease in gripping force caused by the reduction in the shrink fitting allowance.
  • the stator core is more susceptible to distortion due to thermal caulking with the closed container due to the decrease in rigidity of the stator core, and the amount of deformation of the stator shape increases, resulting in noise and vibration of the compressor. There is concern that it will affect it.
  • the compressor 100 according to the first embodiment reduces the variation in the shrinkage fitting allowance and the stress by devising the outer peripheral shape of the stator 1 described below, and makes it possible to improve the performance of the compressor 100. .. Further, the compressor 100 has a heat caulking groove 124 capable of improving the gripping force due to heat caulking, and can suppress deformation of the shape of the stator 1 against distortion due to heat caulking.
  • FIG. 7 is a plan view of the connecting steel plate 2E of the comparative example in which the heat caulking groove 124 and the slit in the right direction are formed.
  • FIG. 8 is a plan view of the connecting steel plate 2F according to the first embodiment in which the heat caulking groove 124 and the slit in the right direction are formed.
  • FIG. 9 is a plan view of another connecting steel plate 2EL of the comparative example in which the heat caulking groove 124 and the slit in the left direction are formed.
  • FIG. 10 is a plan view of another connecting steel plate 2FL according to the first embodiment in which the heat caulking groove 124 and the slit in the left direction are formed.
  • stator 1 in the comparative example is a conventional stator 1.
  • the connecting steel plates described below are collectively referred to as connecting steel plates 2, and the connecting steel plates 2 are annular electromagnetic steel plates formed by connecting the electromagnetic steel plates 20.
  • the stator core 200D of the conventional stator 1 is formed by alternately laminating the connecting steel plate 2E and the connecting steel plate 2EL one by one.
  • the connecting steel plate 2E is configured by arranging all nine electromagnetic steel plates 20 in an annular shape, and the contact portion 132 constitutes a slit facing right.
  • a welding groove 131 is formed at a portion where the electromagnetic steel plates 20 located at both ends are joined to each other.
  • each of the electromagnetic steel sheets 20 constituting the connecting steel sheet 2E has two projecting portions 122 and a joint portion 121 described above, and each of the electromagnetic steel sheets 20 has a heat caulking groove that can be fitted to the closed container 101. 124 is formed.
  • the connecting steel plate 2EL is different from the connecting steel plate 2E only in the direction of the slit. That is, the connecting steel plate 2EL is configured by arranging all nine electromagnetic steel plates 20 in an annular shape, and the contact portion 132 constitutes a slit facing left. In the connecting steel plate 2EL, welding grooves 131 are formed in the portions where the electromagnetic steel plates 20 located at both ends are joined to each other. Further, each of the electromagnetic steel sheets 20 constituting the connecting steel sheet 2EL has the above-mentioned two protrusions 122 and a joint portion 121, and each of the electrical steel sheets 20 has a heat caulking groove that can be fitted to the closed container 101. 124 is formed. In FIG.
  • the electromagnetic steel sheet 20B1, the electromagnetic steel sheet 20B2, the electrical steel sheet 20B3, the electrical steel sheet 20B4, the electrical steel sheet 20B5, the electrical steel sheet 20B6, the electrical steel sheet 20B7, and the electrical steel sheet 20B8 are counterclockwise from the electrical steel sheet 20 having the contact portion 132. , It is shown as an electromagnetic steel sheet 20B9.
  • the stator core 200 of the compressor 100 includes a connecting steel plate 2F and a connecting steel plate 2FL, a connecting steel plate 2I and a connecting steel plate 2IL, a connecting steel plate 2G and a connecting steel plate 2GL, and a connecting steel plate. It has 2H and a connecting steel plate 2HL.
  • the stator core 200 of the compressor 100 according to the first embodiment is formed by alternately laminating the connecting steel plate 2F and the connecting steel plate 2FL one by one.
  • the stator core 200 of the compressor 100 according to the first embodiment has a laminated iron core group A that constitutes a part of the steel plates of the stator core 200 in the laminating direction, and the laminated iron core group A is a laminated connecting steel plate 2F. And a connecting steel plate 2FL.
  • the connecting steel plate 2F is configured by arranging a total of nine electromagnetic steel plates 20 in an annular shape, and the contact portion 132 constitutes a slit facing to the right.
  • a welding groove 131 is formed at a portion where the electromagnetic steel plates 20 located at both ends are joined to each other.
  • each of the electromagnetic steel sheets 20 constituting the connecting steel sheet 2F has two projecting portions 122 and a joint portion 121 as described above, and each electromagnetic steel sheet 20 has a heat caulking groove that can be fitted to the closed container 101. 124 is formed.
  • the heat caulking grooves 124 are formed in all the electromagnetic steel sheets 20, but the heat caulking grooves 124 may not be formed in all the electromagnetic steel sheets 20.
  • the heat caulking groove 124 may be formed only on the three electromagnetic steel plates 20 of, for example, the electromagnetic steel plates 20A2, the electromagnetic steel plates 20A5, and the electromagnetic steel plates 20A8, which are arranged at equal intervals in the circumferential direction.
  • the connecting steel plate 2FL differs from the connecting steel plate 2F only in the direction of the slit. That is, the connecting steel plate 2FL is configured by arranging all nine electromagnetic steel plates 20 in an annular shape, and the contact portion 132 constitutes a slit facing left. In the connecting steel plate 2FL, a welding groove 131 is formed at a portion where the electromagnetic steel plates 20 located at both ends are joined to each other. Further, each of the electromagnetic steel sheets 20 constituting the connecting steel sheet 2FL has two projecting portions 122 and a joint portion 121 as described above, and each electromagnetic steel sheet 20 has a heat caulking groove that can be fitted to the closed container 101. 124 is formed. In FIG.
  • the electromagnetic steel sheet 20B1, the electromagnetic steel sheet 20B2, the electrical steel sheet 20B3, the electrical steel sheet 20B4, the electrical steel sheet 20B5, the electrical steel sheet 20B6, the electrical steel sheet 20B7, and the electrical steel sheet 20B8 are counterclockwise from the electrical steel sheet 20 having the contact portion 132.
  • all the electromagnetic steel sheets 20 are formed with the heat caulking grooves 124, but the heat caulking grooves 124 may not be formed on all the electrical steel sheets 20.
  • the heat caulking groove 124 may be formed only on three electromagnetic steel plates 20, for example, the electromagnetic steel plate 20B2, the electromagnetic steel plate 20B5, and the electromagnetic steel plate 20B8, which are arranged at equal intervals in the circumferential direction.
  • the connecting steel plate 2F has two types of protrusions 122, a pair of first protrusions 122a and a pair of second protrusions 122b.
  • the connecting steel plate 2FL has two types of protrusions 122, a first protrusion 122a and a second protrusion 122b.
  • the amount of protrusion of the first protrusion 122a in the radial direction with respect to the center O is larger than the amount of protrusion of the second protrusion 122b in the radial direction with respect to the center O.
  • the distance from the center O to the outer edge of the first protrusion 122a is larger than the distance from the center O to the outer edge of the second protrusion 122b.
  • the center O is the central portion of the stator core 200. Therefore, the first outer diameter Da of the virtual circle Ca with the center O as the center of the circle and in contact with the first protrusion 122a is larger than the second outer diameter Db of the virtual circle Cb in contact with the second protrusion 122b.
  • the first outer diameter Da is the diameter of the outermost edge portion of the stator core 200.
  • all the protrusions 122 of the plurality of divided iron cores come into contact with the inner peripheral wall of the closed container.
  • the circle Ce shown in FIGS. 7 and 9 is a virtual circle in contact with the protruding portion 122 when it comes into contact with the inner peripheral wall of the closed container in the conventional stator core 200D.
  • the outer diameter De is the diameter of the circle Ce passing through the outermost edge of the conventional stator core 200D.
  • the first outer diameter Da of the stator core 200 is larger than the outer diameter De of the conventional stator core 200D.
  • the second outer diameter Db of the stator core 200 is the same size as the outer diameter De of the conventional stator core 200D, or is smaller than the outer diameter De of the conventional stator core 200D.
  • the first protruding portion 122a is a first contact portion that comes into contact with the inner peripheral wall 101e of the closed container 101, and constitutes a shrink-fitting allowance for the closed container 101. ..
  • the second protruding portion 122b does not come into contact with the inner peripheral wall 101e of the closed container 101 even if the stator core 200 is shrink-fitted into the closed container 101.
  • the conventional stator core 200D when the stator core is shrink-fitted into the closed container, all the protruding portions 122 come into contact with the inner peripheral wall of the closed container.
  • the connecting steel plate 2F and the connecting steel plate 2FL have three electromagnetic steel plates 20 having a first protruding portion 122a and six electromagnetic steel plates 20 having a second protruding portion 122b.
  • the composition ratio of the electromagnetic steel plate 20 having the first protruding portion 122a and the electromagnetic steel plate 20 having the second protruding portion 122b is not limited to the above configuration.
  • the connecting steel plate 2F and the connecting steel plate 2FL may be composed of four or more electromagnetic steel plates 20 having the first protruding portion 122a.
  • FIG. 11 is a diagram comparing the configuration and performance of the compressor 100 of the first embodiment and the conventional compressor.
  • FIG. 12 is a diagram showing the relationship between the shrinkage stress and the motor performance of the compressor 100 of the first embodiment and the conventional compressor based on FIG. 11.
  • the component tolerances are the same and the shrinkage stress lower limit is the same between the conventional compressor and the compressor 100 according to the first embodiment. ..
  • the outer diameter of the stator 1 of the compressor 100 is larger than the outer diameter of the stator of the conventional compressor.
  • the connecting steel plate 2F has a larger outer diameter than the connecting steel plate 2E constituting the stator core 200 of the conventional stator 1.
  • the connecting steel plate 2FL has a larger outer diameter than the connecting steel plate 2EL constituting the stator core 200 of the conventional stator 1.
  • the connecting steel plate 2F only the three electromagnetic steel plates 20 constituting the divided steel core 120 for one phase of the stator core 200 have the protruding portion 122 in contact with the closed container 101, and the shrinkage fitting allowance for the closed container 101 is large. It has three times the length of the conventional connecting steel sheet 2E.
  • the connecting steel plate 2FL only the three electromagnetic steel plates 20 constituting the divided steel core 120 for one phase of the stator core 200 have the protruding portion 122 in contact with the closed container 101 and are shrink-fitted into the closed container 101.
  • the allowance is three times as long as that of the conventional connecting steel plate 2EL.
  • FIG. 13 is a plan view of the electromagnetic steel plate 20I forming a part of the divided iron core 120.
  • FIG. 14 is a plan view of the electromagnetic steel plate 20I forming a part of the divided iron core 120.
  • FIG. 15 is a plan view of the connecting steel plate 2I in which the welding groove 131 and the slit in the right direction are formed.
  • FIG. 16 is a plan view of the connecting steel plate 2IL in which the welding groove 131 and the slit in the left direction are formed.
  • the electromagnetic steel plate 20I of FIG. 13 and the electrical steel plate 20I of FIG. 14, and the connecting steel plate 2I of FIG. 15 and the connecting steel plate 2IL of FIG. 16 differ only in the direction of the slits formed in the stator core 200, and have a basic structure.
  • the stator core 200 of the compressor 100 according to the first embodiment is formed by alternately laminating the connecting steel plates 2I and the connecting steel plates 2IL one by one.
  • the stator core 200 of the compressor 100 according to the first embodiment has a laminated iron core group B forming a part of the steel plates of the stator core 200 in the laminating direction, and the laminated iron core group B is a laminated connecting steel plate 2I. And the connecting steel plate 2IL.
  • the connecting steel plate 2I is composed of a total of nine electromagnetic steel plates 20I arranged in an annular shape, and the contact portion 132 constitutes a slit facing to the right.
  • a welding groove 131 is formed at a portion where the electromagnetic steel plates 20I located at both ends are joined to each other.
  • each electromagnetic steel sheet 20I constituting the connecting steel sheet 2I has two protrusions 122 and a joint portion 121 as described above.
  • the protruding portion 122A is different from the protruding portion 122 of the connecting steel plate 2F and the connecting steel plate 2FL having a protruding piece shape, and the outer edge portion is slightly on the outer peripheral side. It is formed to bulge.
  • the protruding portion 122A is provided at a position on the back yoke portion 20a opposite to the teeth portion 20b.
  • Two protruding portions 122A are formed in the back yoke portion 20a in the circumferential direction with the central groove 126 formed at a position opposite to the teeth portion 20b.
  • the protruding portion 122A of the divided iron core 120 that contacts the inner peripheral wall 101e of the closed container 101 among the plurality of divided iron cores 120 is the first contact portion among the portions that come into contact with the closed container 101, and is shrink-fitted to the closed container 101. Make up the cost.
  • the protruding portion 122 of the divided iron core 120 that contacts the inner peripheral wall 101e of the closed container 101 among the plurality of divided iron cores 120 is the first contact portion among the points that come into contact with the closed container 101 and is sealed. It constitutes a shrink fitting allowance for the container 101. That is, the protrusions 122 and 122A have different shapes depending on the presence or absence of the heat caulking groove 124 in the back yoke portion 20a.
  • the electromagnetic steel sheet 20I constituting the connecting steel sheet 2I is different from the electromagnetic steel sheet 20 constituting the connecting steel sheet 2F in that it does not have the heat caulking groove 124, and the other configurations are the electromagnetic steel sheet 20 forming the connecting steel sheet 2F. It is the same.
  • the electromagnetic steel sheet 20A1, the electromagnetic steel sheet 20A2, the electrical steel sheet 20A3, the electrical steel sheet 20A4, the electrical steel sheet 20A5, the electrical steel sheet 20A6, the electrical steel sheet 20A7, and the electrical steel sheet 20A8 are counterclockwise from the electrical steel sheet 20 having the contact portion 132. , It is shown as an electromagnetic steel sheet 20A9.
  • the connecting steel plate 2IL is composed of a total of nine electromagnetic steel plates 20I arranged in an annular shape, and the contact portion 132 constitutes a slit facing left.
  • welding grooves 131 are formed in the portions where the electromagnetic steel plates 20I located at both ends are joined to each other.
  • each electromagnetic steel sheet 20I constituting the connecting steel sheet 2IL has two protrusions 122A and a joint portion 121.
  • the electromagnetic steel sheet 20I constituting the connecting steel sheet 2IL is different from the electromagnetic steel sheet 20 constituting the connecting steel sheet 2FL in that it does not have the thermal caulking groove 124, and the other configurations are the same as the electromagnetic steel sheet 20 constituting the connecting steel sheet 2FL. is there.
  • FIG. 16 counterclockwise from the electromagnetic steel sheet 20 having the contact portion 132, the electromagnetic steel sheet 20B1, the electromagnetic steel sheet 20B2, the electrical steel sheet 20B3, the electrical steel sheet 20B4, the electrical steel sheet 20B5, the electrical steel sheet 20B6, the electrical steel sheet 20B7, the electrical steel sheet 20B8 , It is shown as an electromagnetic steel sheet 20B9.
  • the connecting steel plate 2I has two types of protrusions 122A, a pair of first protrusions 122Aa and a pair of second protrusions 122Ab.
  • the connecting steel plate 2IL has two types of protrusions 122A, a first protrusion 122Aa and a second protrusion 122Ab.
  • the amount of protrusion of the first protrusion 122Aa in the radial direction with respect to the center O is larger than the amount of protrusion of the second protrusion 122Ab in the radial direction with respect to the center O.
  • the first outer diameter Da of the virtual circle Ca in contact with the first protrusion 122Aa is larger than the second outer diameter Db of the virtual circle Cb in contact with the second protrusion 122Ab.
  • the first outer diameter Da is the diameter of the outermost edge portion of the stator core 200.
  • all the protrusions 122A of the plurality of divided iron cores come into contact with the inner peripheral wall of the closed container.
  • the first outer diameter Da of the stator core 200 is larger than the outer diameter De of the conventional stator core 200D.
  • the second outer diameter Db of the stator core 200 is the same size as the outer diameter De of the conventional stator core 200D, or is smaller than the outer diameter De of the conventional stator core 200D.
  • the first protruding portion 122Aa is a first contact portion that comes into contact with the inner peripheral wall 101e of the closed container 101, and constitutes a shrink-fitting allowance for the closed container 101. ..
  • the second protruding portion 122Ab does not come into contact with the inner peripheral wall 101e of the closed container 101 even if the stator core 200 is shrink-fitted into the closed container 101.
  • the conventional stator core 200D when the stator core is shrink-fitted into the closed container, all the protruding portions 122A come into contact with the inner peripheral wall of the closed container.
  • the connecting steel plate 2I and the connecting steel plate 2IL have three electromagnetic steel plates 20 having a first protruding portion 122Aa and six electromagnetic steel plates 20 having a second protruding portion 122Ab.
  • the composition ratio of the electromagnetic steel plate 20 having the first protruding portion 122Aa and the electromagnetic steel plate 20 having the second protruding portion 122Ab is not limited to the above configuration.
  • the connecting steel plate 2I and the connecting steel plate 2IL may be composed of four or more electromagnetic steel plates 20 having a first protruding portion 122Aa.
  • the outer diameter of the connecting steel plate 2I is larger than that of the connecting steel plate 2E constituting the stator core 200 of the conventional stator 1.
  • the connecting steel plate 2IL has a larger outer diameter than the connecting steel plate 2EL constituting the stator core 200 of the conventional stator 1.
  • the connecting steel plate 2I only the three electromagnetic steel plates 20 constituting the divided steel core 120 for one phase of the stator core 200 have the protruding portion 122A in contact with the closed container 101, and the shrinkage fitting allowance for the closed container 101 is large. It has three times the length of the conventional connecting steel sheet 2E.
  • the connecting steel plate 2IL only the three electromagnetic steel plates 20 constituting the split iron core 120 for one phase of the stator core 200 have the protrusion 122A in contact with the closed container 101 and are shrink-fitted into the closed container 101. The allowance is three times as long as that of the conventional connecting steel plate 2EL.
  • FIG. 17 is an enlarged plan view of the stator core 200 at the welding position between the divided iron cores 120 using the connecting steel plate 2G.
  • FIG. 18 is a plan view of the connecting steel plate 2G in which the heat caulking groove 124, the weld small groove 133, and the slit in the right direction are formed.
  • FIG. 19 is a plan view of the connecting steel plate 2GL in which the heat caulking groove 124, the weld small groove 133, and the slit in the left direction are formed.
  • the connecting steel plate 2G of FIG. 17 and the connecting steel plate 2GL of FIG. 18 differ only in the orientation of the slits formed in the stator core 200, and have the same basic structure.
  • the stator core 200 of the compressor 100 according to the first embodiment is formed by alternately laminating a connecting steel plate 2G and a connecting steel plate 2GL one by one.
  • the stator core 200 of the compressor 100 according to the first embodiment has a laminated iron core group C that constitutes a part of the steel plates of the stator core 200 in the laminating direction, and the laminated iron core group C is a laminated connecting steel plate 2G. And a connecting steel plate 2GL.
  • the connecting steel plate 2G is configured by arranging all nine electromagnetic steel plates 20 in an annular shape, and the contact portion 132 constitutes a slit facing to the right.
  • weld small grooves 133 are formed at portions where the electromagnetic steel plates 20 located at both ends are joined to each other.
  • the circumferential width of the weld groove 133 is smaller than the circumferential width of the weld groove 131 formed on the connecting steel plate 2F. Therefore, in the stacking direction of the steel plates of the stator core 200, grooves having different widths are formed on the outer peripheral wall 1a of the stator core 200 by the weld groove 131 and the weld small groove 133.
  • the connecting steel plate 2G has an edge contact portion 135 that forms an edge portion of the weld groove 133 along the weld groove 133.
  • the edge contact portions 135 are located on both sides of the weld groove 133 in the circumferential direction of the connecting steel plate 2G.
  • the edge contact portion 135 forms a part of the outer peripheral wall 1a.
  • the marginal contact portion 135 is a portion in the compressor 100 where the stator core 200 and the closed container 101 come into contact with each other.
  • the marginal contact portion 135 is a second contact portion in the portion that comes into contact with the closed container 101, and is a pair of contact portions that abut the inner peripheral wall 101e of the closed container 101 in the closed container 101.
  • each of the electromagnetic steel sheets 20 constituting the connecting steel sheet 2G has the first protruding portion 122a or the second protruding portion 122b described above, and also has a joint portion 121, and each electromagnetic steel plate 20 has a closed container 101.
  • a heat caulking groove 124 that can be fitted is formed.
  • the connecting steel plate 2G is formed in that the weld groove 133 having a width smaller in the circumferential direction than the weld groove 131 is formed, and has edge contact portions 135 on both sides of the weld groove 133 in the circumferential direction.
  • other configurations are the same as those of the connecting steel plate 2F. In FIG.
  • all the electromagnetic steel sheets 20 are formed with the heat caulking grooves 124, but the heat caulking grooves 124 may not be formed on all the electrical steel sheets 20.
  • the heat caulking groove 124 may be formed only on the three electromagnetic steel plates 20 of, for example, the electromagnetic steel plates 20A2, the electromagnetic steel plates 20A5, and the electromagnetic steel plates 20A8, which are arranged at equal intervals in the circumferential direction.
  • the connecting steel plate 2GL is configured by arranging all nine electromagnetic steel plates 20 in an annular shape, and the contact portion 132 constitutes a slit facing left.
  • weld small grooves 133 are formed in the portions where the electromagnetic steel plates 20 located at both ends are joined to each other.
  • the width of the weld groove 133 in the circumferential direction is smaller than the width of the weld groove 131 formed in the connecting steel plate 2FL in the circumferential direction.
  • the connecting steel plate 2GL has an edge contact portion 135 that forms an edge portion of the weld groove 133 along the weld groove 133.
  • the edge contact portions 135 are located on both sides of the weld groove 133 in the circumferential direction of the connecting steel plate 2GL.
  • the edge contact portion 135 forms a part of the outer peripheral wall 1a.
  • the marginal contact portion 135 is a portion in the compressor 100 where the stator core 200 and the closed container 101 come into contact with each other.
  • each electromagnetic steel sheet 20 constituting the connecting steel sheet 2GL has the above-mentioned first protruding portion 122a or second protruding portion 122b and also has a joint portion 121, and each electromagnetic steel plate 20 is fitted with a closed container 101.
  • a flexible heat caulking groove 124 is formed.
  • the connecting steel plate 2GL is formed in that the weld groove 133 having a width smaller in the circumferential direction than the weld groove 131 is formed, and has edge contact portions 135 on both sides of the weld groove 133 in the circumferential direction.
  • other configurations are the same as those of the connecting steel plate 2FL. In FIG.
  • the heat caulking grooves 124 are formed in all the electromagnetic steel sheets 20, but the heat caulking grooves 124 may not be formed in all the electromagnetic steel sheets 20.
  • the heat caulking groove 124 may be formed only on the three electromagnetic steel plates 20 of, for example, the electromagnetic steel plates 20A2, the electromagnetic steel plates 20A5, and the electromagnetic steel plates 20A8, which are arranged at equal intervals in the circumferential direction.
  • the outer diameter of the connecting steel plate 2G is larger than that of the connecting steel plate 2E constituting the stator core 200 of the conventional stator 1.
  • the connecting steel plate 2GL has a larger outer diameter than the connecting steel plate 2EL constituting the stator core 200 of the conventional stator 1.
  • the connecting steel plate 2G only the three electromagnetic steel plates 20 constituting the divided steel core 120 for one phase of the stator core 200 have the protruding portion 122 in contact with the closed container 101, and the shrinkage fitting allowance for the closed container 101 is large. It has three times the length of the conventional connecting steel sheet 2E.
  • FIG. 20 is a plan view of the connecting steel plate 2H in which the weld groove 133 and the slit in the right direction are formed.
  • FIG. 21 is a plan view of the connecting steel plate 2HL in which the welded groove 133 and the slit in the left direction are formed.
  • the connecting steel plate 2H of FIG. 20 and the connecting steel plate 2HL of FIG. 21 differ only in the direction of the slits formed in the stator core 200, and have the same basic structure.
  • the stator core 200 of the compressor 100 according to the first embodiment is formed by alternately laminating the connecting steel plate 2H and the connecting steel plate 2HL one by one.
  • the stator core 200 of the compressor 100 has a laminated iron core group D that constitutes a part of the steel plates of the stator core 200 in the laminating direction, and the laminated iron core group D is a laminated connecting steel plate 2H. And a connecting steel plate 2HL.
  • the connecting steel plate 2H is configured by arranging a total of nine electromagnetic steel plates 20 in an annular shape, and the contact portion 132 constitutes a slit facing to the right.
  • weld small grooves 133 are formed at portions where the electromagnetic steel plates 20 located at both ends are joined to each other.
  • the circumferential width of the weld groove 133 is smaller than the circumferential width of the weld groove 131 formed on the connecting steel plate 2F.
  • the connecting steel plate 2H has an edge contact portion 135 that forms an edge portion of the weld groove 133 along the weld groove 133.
  • the marginal contact portions 135 are located on both sides of the weld groove 133 in the circumferential direction of the connecting steel plate 2H.
  • each electromagnetic steel plate 20 constituting the connecting steel plate 2H has the above-mentioned first protruding portion 122Aa or second protruding portion 122Ab and has a joint portion 121, respectively.
  • the electromagnetic steel sheet 20 constituting the connecting steel sheet 2H is different from the electromagnetic steel sheet 20 forming the connecting steel sheet 2F in that it does not have the heat caulking groove 124.
  • the connecting steel plate 2H has a welding groove 133 having a width smaller in the circumferential direction than the welding groove 131 and having edge contact portions 135 on both sides of the welding groove 133 in the circumferential direction.
  • the other configurations are the same as those of the connecting steel plate 2I, unlike the connecting steel plate 2I. In FIG.
  • the electromagnetic steel sheet 20A1 the electromagnetic steel sheet 20A2, the electrical steel sheet 20A3, the electrical steel sheet 20A4, the electrical steel sheet 20A5, the electrical steel sheet 20A6, the electrical steel sheet 20A7, the electrical steel sheet 20A8 , It is shown as an electromagnetic steel sheet 20A9.
  • the connecting steel plate 2HL is configured by arranging all nine electromagnetic steel plates 20 in an annular shape, and the contact portion 132 constitutes a slit facing left.
  • weld small grooves 133 are formed in the portions where the electromagnetic steel plates 20 located at both ends are joined to each other.
  • each electromagnetic steel plate 20 constituting the connecting steel plate 2HL has the above-mentioned first protruding portion 122Aa or second protruding portion 122Ab and also has a joint portion 121.
  • the electromagnetic steel sheet 20 constituting the connecting steel sheet 2HL is different from the electromagnetic steel sheet 20 constituting the connecting steel sheet 2FL in that it does not have the heat caulking groove 124.
  • the connecting steel plate 2HL is formed in that the weld groove 133 having a width smaller in the circumferential direction than the weld groove 131 is formed, and has edge contact portions 135 on both sides of the weld groove 133 in the circumferential direction.
  • the electromagnetic steel sheet 20B1, the electromagnetic steel sheet 20B2, the electrical steel sheet 20B3, the electrical steel sheet 20B4, the electrical steel sheet 20B5, the electrical steel sheet 20B6, the electrical steel sheet 20B7, and the electrical steel sheet 20B8 are counterclockwise from the electrical steel sheet 20 having the contact portion 132.
  • the outer diameter of the connecting steel plate 2H is larger than that of the connecting steel plate 2E constituting the stator core 200 of the conventional stator 1.
  • the connecting steel plate 2HL has a larger outer diameter than the connecting steel plate 2EL constituting the stator core 200 of the conventional stator 1.
  • the connecting steel plate 2H only the three electromagnetic steel plates 20 constituting the divided steel core 120 for one phase of the stator core 200 have the protruding portion 122A in contact with the closed container 101, and the shrinkage fitting allowance for the closed container 101 is large. It has three times the length of the conventional connecting steel sheet 2E.
  • the connecting steel plate 2HL only the three electromagnetic steel plates 20 constituting the divided steel core 120 for one phase of the stator core 200 have the protrusion 122A in contact with the closed container 101 and are shrink-fitted into the closed container 101.
  • the allowance is three times as long as that of the conventional connecting steel plate 2EL.
  • FIG. 22 is a diagram summarizing the features of the laminated iron core group A, the laminated iron core group B, the laminated iron core group C, and the laminated iron core group D.
  • the laminated iron core group A is composed of a connecting steel plate 2F and a connecting steel plate 2FL, and a heat caulking groove 124 and a welding groove 131 are formed on the outer peripheral wall 1a.
  • the laminated iron core group B is composed of a connecting steel plate 2I and a connecting steel plate 2IL, and a welding groove 131 is formed in the outer peripheral wall 1a.
  • the laminated iron core group C is composed of a connecting steel plate 2G and a connecting steel plate 2GL, and a heat caulking groove 124 and a welded small groove 133 are formed on the outer peripheral wall 1a.
  • the laminated iron core group D is composed of a connecting steel plate 2H and a connecting steel plate 2HL, and a weld small groove 133 is formed on the outer peripheral wall 1a.
  • FIG. 23 is a side view of a part of the stator core 200 of the compressor 100 according to the first embodiment in the circumferential direction.
  • FIG. 24 is a side view of the position of the contact portion in the stator core 200 of the compressor 100 according to the first embodiment.
  • the stator core 200 of the compressor 100 according to the first embodiment is a combination of the above-mentioned laminated iron core group A, laminated iron core group B, laminated iron core group C, and laminated iron core group D. It is composed of.
  • FIGS. 23 is a side view of a part of the stator core 200 of the compressor 100 according to the first embodiment in the circumferential direction.
  • FIG. 24 is a side view of the position of the contact portion in the stator core 200 of the compressor 100 according to the first embodiment.
  • the stator core 200 of the compressor 100 according to the first embodiment is a combination of the above-mentioned laminated iron core group A, laminated iron core group B, laminated iron core group C, and laminated iron core group
  • the stator core 200 has a laminated core group D, a laminated iron core group B, a laminated iron core group A, and a laminated iron core group C from one end to the other end in the stacking direction constituting the stator core 200.
  • Laminated iron core group A, laminated iron core group B, and laminated iron core group D are combined in this order.
  • the method of combining the laminated iron core groups A to D is an example, and the method of combining the laminated iron core groups A to D is not limited to the above configuration.
  • the laminated iron core group D, the laminated iron core group B, the laminated iron core group C, the laminated iron core group B, and the laminated iron core group D are combined and laminated in this order from one end to the other end in the lamination direction constituting the stator core 200. It is not necessary to use the iron core group A.
  • the stator core 200 is partly in the stacking direction by laminating the electromagnetic steel plates 20 constituting the laminated iron core group A, the laminated iron core group B, the laminated iron core group C, and the laminated iron core group D.
  • the heat caulking groove 124 is formed.
  • a heat caulking groove 124 is formed in a part of the steel plate stacking direction, that is, a part of the stator 1 in the axial direction when viewed from the outer peripheral side of the divided iron core 120.
  • the heat caulking groove 124 is formed in a part of the circumferential direction and the axial direction R of the stator core 200, and the side wall forming the concave shape of the heat caulking groove 124 is a plate of the electromagnetic steel plate 20 forming the divided iron core 120. It is composed of faces and sides. As shown in FIG. 23, it is desirable that the heat caulking groove 124 is formed at the center of the stator core 200 in the axial direction R.
  • the stator core 200 is formed on both sides of the outer peripheral wall 1a in the circumferential direction with respect to the contact position CT between the divided iron cores 120 located at both ends of the plurality of divided iron cores 120 connected. It has an edge contact portion 135 that is formed. As shown in FIGS. 23 and 24, the edge contact portion 135 is formed at the same position as the heat caulking groove 124 to which heat caulking is applied in the stacking direction of the steel plates. That is, the edge contact portion 135 is formed at the same position as the position of the thermal caulking performed from the outer diameter side of the closed container 101 in the axial direction R of the stator core 200. Further, the stator core 200 has edge contact portions 135 at both ends of the steel plate in the laminating direction.
  • a groove is formed in the outer peripheral wall 1a of the stator core 200 along the contact position CT.
  • This groove is composed of a welding groove 131 having a wide peripheral direction and a welding small groove 133 having a narrow width in the circumferential direction.
  • the edge contact portion 135 in contact with the inner peripheral wall 101e of the closed container 101 is composed of wall portions located on both sides in the circumferential direction of the weld groove 133.
  • the contact portion 132 is fixed by welding in the weld groove 131 or the weld groove 133.
  • the weld bead 140 is formed in the weld groove 131 or the weld groove 133 formed in the outer peripheral wall 1a.
  • the welding bead 140 is a swelling of welding marks generated by welding.
  • FIG. 25 is a conceptual diagram illustrating the stator 1 of the compressor 100 according to the first embodiment.
  • the compressor 100 has three contact portions TA where the closed container 101 and the stator 1 come into contact with each other.
  • the contact portion TA the first protruding portion 122a and the first protruding portion 122Aa of the stator 1 are in contact with the inner peripheral wall 101e of the closed container 101.
  • the first protruding portion 122a and the first protruding portion 122Aa are continuously arranged so as to be aligned with the axial direction R, and the continuous protruding portion 122 is formed so as to extend in the axial direction R.
  • the integrated first protruding portion 122a and the first protruding portion 122Aa are formed in the stator 1 so as to be centered on the center O and to protrude from a virtual perfect circle along the outer edge of the stator 1.
  • the stator core 200 is a first contact portion in which only three divided cores 120 arranged at equal intervals among the plurality of divided cores 120 in the circumferential direction of the stator core 200 come into contact with the closed container 101.
  • It has one protruding portion 122a and a first protruding portion 122Aa. That is, in the compressor 100, the positions where the inner surface of the closed container 101 and the outer peripheral surface of the stator 1 come into contact with each other are defined at three points in the circumferential direction. In the compressor 100, of the nine divided iron cores 120 forming the stator 1, three divided iron cores 120 arranged equidistantly from each other in the circumferential direction are in contact with the closed container. The number of divided iron cores 120 in contact with the closed container 101 is not limited to three.
  • the compressor 100 according to the first embodiment shows an embodiment having nine divided iron cores 120 as an example, and if the number of the divided iron cores 120 constituting the stator 1 is different, the divided iron cores are in contact with the closed container 101.
  • the number of 120 may be other than three.
  • it is desirable that the divided iron cores 120 in contact with the closed container 101 are arranged at equal intervals in the circumferential direction.
  • FIG. 26 is another conceptual diagram illustrating the stator 1 of the compressor 100 according to the first embodiment.
  • the above-mentioned winding 4 is not shown.
  • FIG. 26 shows an example of the formation position of the heat caulking groove 124 in the circumferential direction of the compressor 100.
  • the stator core 200 has a heat caulking groove 124 that contacts the closed container 101 by heat caulking only in the three divided cores 120 arranged at equal intervals among the plurality of divided cores 120 in the circumferential direction of the stator core 200. Is formed.
  • heat caulking grooves 124 are formed in the three divided iron cores 120 arranged at equal distances from each other in the circumferential direction.
  • the number of the divided iron cores 120 in which the heat caulking grooves 124 are formed is not limited to three.
  • the compressor 100 according to the first embodiment shows an embodiment having nine divided iron cores 120 as an example, and if the number of the divided iron cores 120 constituting the stator 1 is different, a heat caulking groove 124 is formed.
  • the number of the divided iron cores 120 may be other than three.
  • the split iron cores 120 in which the thermal caulking grooves 124 are formed are arranged at equal intervals in the circumferential direction. Further, in the compressor 100, heat caulking grooves 124 may be formed in all the divided iron cores 120 forming the stator 1.
  • FIG. 27 is a configuration diagram of the compressor 100 according to the first embodiment and the compressor 150 according to the second embodiment.
  • the divided iron core T1 is a divided iron core 120 composed of the electromagnetic steel plate 20A1 and the electromagnetic steel plate 20B1.
  • the divided iron core T2 is a divided iron core 120 composed of an electromagnetic steel plate 20A2 and an electromagnetic steel plate 20B2.
  • the divided iron core T3 is a divided iron core 120 composed of an electromagnetic steel plate 20A3 and an electromagnetic steel plate 20B3.
  • the divided iron core T4 is a divided iron core 120 composed of an electromagnetic steel plate 20A4 and an electromagnetic steel plate 20B4.
  • the divided iron core T5 is a divided iron core 120 composed of an electromagnetic steel plate 20A5 and an electromagnetic steel plate 20B5.
  • the divided iron core T6 is a divided iron core 120 composed of an electromagnetic steel plate 20A6 and an electromagnetic steel plate 20B6.
  • the divided iron core T7 is a divided iron core 120 composed of an electromagnetic steel plate 20A7 and an electromagnetic steel plate 20B7.
  • the divided iron core T8 is a divided iron core 120 composed of an electromagnetic steel plate 20A8 and an electromagnetic steel plate 20B8.
  • the divided iron core T9 is a divided iron core 120 composed of an electromagnetic steel plate 20A9 and an electromagnetic steel plate 20B9.
  • the split core T1 and the split core T9 are end-divided cores located at both ends of a plurality of connected split cores 120. In the stator core 200, end-divided cores, that is, the divided cores T1 and the divided cores T9 are joined by welding.
  • the portion range surrounded by the dotted line represents the portion where the shrink fitting allowance is generated. Further, in the “CENTER” of FIG. 27, the range surrounded by the dotted line represents a portion where the shrinkage allowance is 0 or more. Further, in the “burning allowance (CENTER)", a negative value indicates that a gap is generated. Further, “yes” and “no” of the “heat caulking groove” indicate whether or not the heat caulking groove 124 is formed in the stator, and “yes” indicates that the heat caulking groove 124 is formed in the stator 1. In the case of "none", the heat caulking groove 124 is not formed in the stator 1.
  • stator core 200 First, the effect of the contact point of the stator core 200 with the closed container 101 and the diameter of the stator core 200 will be described with reference to FIGS. 11, 12, and 27.
  • the stator core 200 of the compressor 100 according to the first embodiment determines the shape of the connecting steel plate to be used, the number of contact points with the closed container 101, and the outer diameter of the stator core 200 as shown in FIGS. 11 and 27. When it has, the following effects are produced.
  • the compressor 100 according to the first embodiment can provide a high-performance motor as compared with the conventional compressor.
  • the stator 1 having a three-phase structure having a total of nine divided iron cores 120 in the circumferential direction only one phase is in contact with the closed container 101. ..
  • the compressor 100 according to the first embodiment has a structure in which the P-phase divided iron core 120 contacts the closed container 101 in the stator 1 having an N-phase structure having all M divided iron cores 120 in the circumferential direction. Can be done.
  • the protruding portions 122 and the protruding portions 122A are in contact with the inner peripheral wall 101e of the closed container 101 for the P-phase divided iron cores. Has 120. Further, when the plurality of divided iron cores 120 are all M divided iron cores 120 constituting the N-phase structure, the protruding portion 122 and the protruding portion 122A do not come into contact with the inner peripheral wall 101e (NP). It has a split iron core 120.
  • the stator core 200 has a shrinkage fitting allowance when all of all M divided iron cores 120 come into contact with the inner peripheral wall 101e at the contact point with the closed container 101, as in the shrinkage fitting allowance of a conventional compressor. In comparison, it has an outer peripheral wall 1a that is N / P times thicker as a shrink fitting allowance.
  • the stator 1 having the outer diameter of the contact point with the closed container 101 having a shrink fitting allowance N / P times that of the conventional compressor has a shrink fitting stress.
  • the variation can be P / N times.
  • a compressor manufactured by the stator heat caulking method improves the shrinkage gripping force between the stator and the closed container.
  • the compressor manufactured by this method secures a shrinkage fitting allowance of 0 or more from the viewpoint of diverting the current production equipment, and reduces the shrinkage fitting allowance between the stator and the closed container.
  • the shrinkage fitting allowance that can be reduced is limited by the variation in the dimensions of the inner diameter of the closed container and the outer diameter of the stator.
  • the stator core 200 of the compressor 100 according to the first embodiment is compared with the shrinkage fitting allowance when all the M divided iron cores 120 are in contact with the inner peripheral wall 101e at the contact points with the closed container 101. It has an outer peripheral wall 1a that serves as a shrink fitting allowance with a thickness of N / P times.
  • the stator core 200 of the compressor 100 according to the first embodiment has this configuration, and when the required shrinkage stress is equal to the shrinkage stress of the conventional stator core, the shrinkage stress varies. Can be P / N. Therefore, the stator core 200 of the compressor 100 according to the first embodiment can apply the reduced amount of variation in the shrinkage fitting allowance to the reduction of the shrinkage fitting allowance, and suppresses the increase in iron loss due to the shrinkage fitting stress. Can be efficient. Since the stator 1, the electric motor unit 102 having the stator, and the compressor 100 having the electric motor unit 102 have the stator core 200 having the above configuration, they have the same effect as the stator core 200. ..
  • the connecting steel plate 2F to the connecting steel plate 2GL having the heat caulking groove 124 on the outer peripheral wall 1a of the stator core 200 and the connecting steel plate 2GL not having the heat caulking groove 124 are not provided.
  • the divided iron core T2, the divided iron core T5, and the divided iron core T8 are respectively in the direction of stacking the steel plates when viewed from the outer peripheral side of the divided iron core T2, the divided iron core T5, and the divided iron core T8.
  • a heat caulking groove 124 is formed in a part, that is, a part in the axial direction of the stator 1.
  • the heat caulking groove 124 is formed in a part of the circumferential direction and the axial direction R of the stator core 200, and the side wall forming the heat caulking groove 124 is composed of the split iron core 120.
  • the gripping force by the heat caulking is the heat caulking groove 124. It acts not only in the circumferential direction of the steel plate but also in the stacking direction of the steel plates, that is, in the axial direction of the stator 1. Further, it is desirable that the heat caulking groove 124 is formed at the center of the stator core 200 in the axial direction R. Since the heat caulking groove 124 is formed at the position, the gripping force due to the heat caulking acts on the stator 1 in a well-balanced manner in the axial direction and the circumferential direction.
  • the stator 1 secures the overall rigidity. Can be done.
  • the compressor 100 according to the first embodiment can improve the gripping force of the stator 1 by the closed container 101 as compared with the thermal caulking of the closed container and the stator of the conventional compressor, and the stator 1 can be improved.
  • the quality of holding torque and pull-out load is improved.
  • the gripping force between the stator 1 and the closed container 101 can be improved, and the holding torque of the stator 1 can be removed.
  • the quality of the load is improved.
  • the stator core 200 of the compressor 100 has an inner surface of the closed container 101 and an outer surface of the stator 1 by preventing the position of the thermal caulking from shifting as compared with the conventional compressor.
  • the closed container 101 and the stator 1 can be fixed even if the number of contact points is reduced.
  • the stator core 200 of the compressor 100 according to the first embodiment does not receive stress from the closed container 101 to the stator 1 by reducing the contact points between the inner surface of the closed container 101 and the outer surface of the stator 1. Thus, the distortion of the stator 1 can be minimized. Further, in the stator core 200 of the compressor 100 according to the first embodiment, only the three divided cores 120 arranged at equal intervals among the plurality of divided iron cores 120 in the circumferential direction of the stator core 200 are the first. It has one contact part. The stator core 200 can support the stress applied to the stator 1 from the closed container 101 at three points of the first contact portion evenly arranged, and the stress can be balanced. As a result, the stator 1 can minimize the stress-based strain of the closed container 101.
  • each of the split core T2, the split core T5, and the split core T8 constituting the stator core 200 is laminated with steel plates when viewed from the outer peripheral side of the split core T2, the split core T5, and the split core T8.
  • a case where the heat caulking groove 124 is formed in a part of the direction will be described.
  • a weld groove 131 and a welding small groove 133 are formed in the divided iron cores 120 located at both ends of the connected divided iron cores 120.
  • the stator core 200 has edge contact portions 135 on both sides of the weld groove 133 in the circumferential direction.
  • the split cores 120 located at both ends of the connected split cores 120 are described as the split cores T1 and the split cores T9 in FIG. 27.
  • the edge contact portion 135 in contact with the closed container 101 is formed at the same position as the heat caulking groove 124 in the stacking direction of the steel plates. Further, the edge contact portions 135 are formed at both ends of the stator core 200 in the stacking direction of the steel plates.
  • the edge contact portion 135 and the heat caulking groove 124 are formed at the same position from the end portion of the stator core 200. Further, the edge contact portion 135 is formed at the upper and lower end portions of the stator core 200 in the axial direction.
  • the split core T2 In the manufacturing process of the compressor 100, for example, when the split core T2, the split core T5, and the split core T8 are pushed toward the inner diameter side due to distortion due to thermal caulking, the other split core 120 is moved to the outer diameter side of the stator core 200. Make a transformation that keeps the balance so that it moves.
  • the strength of the welded portion between the split core T1 and the split core T9 located at both ends of the connected split core 120 is the weakest.
  • the stator 1 The shape of the can be extremely deteriorated. That is, in general, in the stator thermal caulking method, when an iron core divided in the circumferential direction is used as the stator core, the rigidity of the stator is reduced due to the reduction of the shrink fitting allowance, and it is easily affected by the distortion of the closed container. May become. Further, the stator core is easily affected by distortion due to thermal caulking of the closed container due to the decrease in rigidity, and there is a concern that the increase in the amount of deformation of the stator shape may affect the noise and vibration of the compressor.
  • the marginal contact portion 135 formed by the split core T1 and the split core T9 located at both ends of the connected split core 120 has a shrink fitting allowance near 0 for the closed container 101. Then, when the edge contact portion 135 exerts a force that deforms the stator core 200 to the outer diameter side by thermal caulking with respect to the split core T1 and the split core T9 located at both ends of the connected split core 120. , It comes into contact with the closed container 101 and acts in the direction of increasing the shrinkage fitting allowance. Therefore, the edge contact portion 135 can suppress the deformation of the stator 1 due to thermal caulking. As a result, noise and vibration can be suppressed by the stator 1 having improved resistance to distortion due to thermal caulking, and the quality of the compressor 100 can be improved.
  • Embodiment 2 The compressor 150 according to the second embodiment will be described with reference to FIG. 27.
  • the parts having the same configuration as the compressor 100 of FIGS. 1 to 24 are designated by the same reference numerals, and the description thereof will be omitted.
  • the compressor 150 according to the second embodiment has a connecting steel plate 2F, a connecting steel plate 2FL, a connecting steel plate 2I, a connecting steel plate 2IL, a connecting steel plate 2G, a connecting steel plate 2GL, and a connecting steel plate. It has 2H and a connecting steel plate 2HL. That is, the compressor 150 according to the second embodiment has the above-mentioned laminated iron core group A, laminated iron core group B, laminated iron core group C, and laminated iron core group D.
  • the compressor 150 according to the second embodiment has a connecting steel plate 2Fa, a connecting steel plate 2Fb, a connecting steel plate 2Ia, a connecting steel plate 2Ib, a connecting steel plate 2Ga, a connecting steel plate 2Gb, a connecting steel plate 2Ha, and a connecting steel plate 2Hb.
  • the compressor 150 according to the second embodiment has a connecting steel plate 2FLa, a connecting steel plate 2FLb, a connecting steel plate 2ILa, a connecting steel plate 2ILb, a connecting steel plate 2GLa, a connecting steel plate 2GLb, a connecting steel plate 2HLa, and a connecting steel plate 2HLb.
  • the slit directions of the connecting steel plate 2Fa and the connecting steel plate 2FLa, the connecting steel plate 2Fb and the connecting steel plate 2FLb, the connecting steel plate 2Ia and the connecting steel plate 2ILa, and the connecting steel plate 2Ib and the connecting steel plate 2ILb are different from each other.
  • the connecting steel plate 2Ga and the connecting steel plate 2GLa, the connecting steel plate 2Gb and the connecting steel plate 2GLb, the connecting steel plate 2Ha and the connecting steel plate 2HLa, and the connecting steel plate 2Hb and the connecting steel plate 2HLb also have different slit directions.
  • the connecting steel plate 2F has the same configuration as the above-mentioned connecting steel plate 2F, but the protrusions 122 of the electrical steel plate 20A1, the electrical steel plate 20A4, and the electrical steel plate 20A7 constituting the split iron core T1, the split core T4, and the split steel core T7 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2FLa has the same configuration as the above-mentioned connecting steel plate 2FL, but the electromagnetic steel plate 20B1, the electromagnetic steel plate 20B4, and the protruding portion 122 of the electromagnetic steel plate 20B7 constituting the divided iron core T1, the divided iron core T4 and the divided iron core T7 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2Fb has the same configuration as the above-mentioned connecting steel plate 2F, but the protrusions 122 of the electrical steel sheet 20A3, the electrical steel sheet 20A6, and the electrical steel sheet 20A9 constituting the split iron core T3, the split iron core T6, and the split iron core T9 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2FLb has the same configuration as the above-mentioned connecting steel plate 2FL, but the electrical steel plate 20B3, the electrical steel sheet 20B6, and the protruding portion 122 of the electrical steel sheet 20B9 constituting the split iron core T3, the split iron core T6, and the split iron core T9 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2Ia has the same configuration as the above-mentioned connecting steel plate 2I, but the protrusions 122 of the electrical steel plate 20A1, the electrical steel plate 20A4, and the electrical steel plate 20A7 constituting the split iron core T1, the split core T4, and the split steel core T7 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2ILa has the same configuration as the above-mentioned connecting steel plate 2IL, but the protrusions 122 of the electrical steel sheet 20B1, the electrical steel sheet 20B4, and the electrical steel sheet 20B7 constituting the split iron core T1, the split iron core T4, and the split iron core T7 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2Ib has the same configuration as the above-mentioned connecting steel plate 2I, but the protrusions 122 of the electrical steel sheet 20A3, the electrical steel sheet 20A6, and the electrical steel sheet 20A9 constituting the split iron core T3, the split iron core T6, and the split iron core T9 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2ILb has the same configuration as the above-mentioned connecting steel plate 2IL, but the protrusions 122 of the electrical steel sheet 20B3, the electrical steel sheet 20B6, and the electrical steel sheet 20B9 constituting the split iron core T3, the split iron core T6, and the split iron core T9 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2Ga has the same configuration as the above-mentioned connecting steel plate 2G, but the protruding portions 122 of the electrical steel plate 20A1, the electrical steel plate 20A4, and the electrical steel sheet 20A7 constituting the split iron core T1, the split core T4, and the split steel core T7 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2GLa has the same configuration as the above-mentioned connecting steel plate 2GL, but the electromagnetic steel plate 20B1, the electromagnetic steel plate 20B4, and the protruding portion 122 of the electromagnetic steel plate 20B7 constituting the divided iron core T1, the divided iron core T4 and the divided iron core T7 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2Gb has the same configuration as the above-mentioned connecting steel plate 2G, but the protrusions 122 of the electrical steel plate 20A3, the electrical steel sheet 20A6, and the electrical steel sheet 20A9 constituting the split iron core T3, the split iron core T6, and the split iron core T9 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2GLb has the same configuration as the above-mentioned connecting steel plate 2GL, but the magnetic steel plate 20B3, the electromagnetic steel plate 20B6, and the protruding portion 122 of the electromagnetic steel plate 20B9 constituting the divided iron core T3, the divided iron core T6, and the divided iron core T9 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2Ha has the same configuration as the above-mentioned connecting steel plate 2H, but the protrusions 122 of the electrical steel plate 20A1, the electrical steel plate 20A4, and the electrical steel plate 20A7 constituting the split iron core T1, the split core T4, and the split steel core T7 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2HLa has the same configuration as the above-mentioned connecting steel plate 2HL, but the electromagnetic steel plate 20B1, the electromagnetic steel plate 20B4, and the protruding portion 122 of the electromagnetic steel plate 20B7 constituting the divided iron core T1, the divided iron core T4 and the divided iron core T7 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2Hb has the same configuration as the above-mentioned connecting steel plate 2H, but the protrusions 122 of the electrical steel sheet 20A3, the electrical steel sheet 20A6, and the electrical steel sheet 20A9 constituting the split iron core T3, the split iron core T6, and the split iron core T9 are sealed containers 101. It is configured to come into contact with.
  • the connecting steel plate 2HLb has the same configuration as the above-mentioned connecting steel plate 2HL, but the electrical steel plate 20B3, the electrical steel sheet 20B6, and the protruding portion 122 of the electrical steel sheet 20B9 constituting the split iron core T3, the split iron core T6, and the split iron core T9 are sealed containers 101. It is configured to come into contact with.
  • the compressor 150 according to the second embodiment has a split core T1, a split core T4 and a split core T7, and a protruding portion 122 in which the split core T3, the split core T6 and the split core T9 come into contact with the closed container 101. Further, the compressor 150 according to the second embodiment has an edge contact portion 135 in which the split iron core T1 and the split iron core T9 come into contact with the closed container 101.
  • the compressor 150 according to the second embodiment has a protruding portion 122 in which the split iron core 120 for each phase comes into contact with the closed container 101 with respect to the compressor 100 according to the first embodiment, and is arbitrary in the stacking direction.
  • the divided iron cores 120 of each phase come into contact with the closed container 101.
  • the stator core 200 of the compressor 150 according to the second embodiment has N to N ⁇ P types in which the contact points with the closed container 101 are different in the circumferential direction in the cross section perpendicular to the axial direction R of the stator core 200. It has the shape of the outer peripheral wall 1a of.
  • the stator core 200 has N to N ⁇ P type connecting steel plates 2 in which the positions of the protrusions 122 in contact with the closed container 101 are different in the circumferential direction of the stator core.
  • the contact points with the closed container 101 are all the divided iron cores with respect to the stacking direction of the steel plates. It is configured to make contact at 120. Therefore, in the compressor 150 according to the second embodiment, the shrinkage stress is applied to the fully divided iron core in a well-balanced manner, and the shape of the stator 1 tends to be a perfect circle. As a result, the compressor 150 according to the second embodiment can further suppress noise and vibration as compared with the compressor 100 according to the first embodiment.
  • the compressor 150 according to the second embodiment has a structure in which the P-phase divided iron core 120 comes into contact with the closed container 101 in the stator 1 having an N-phase structure having all M divided iron cores 120 in the circumferential direction. can do. That is, when the split core 120 is a total of M split cores 120 constituting the N-phase structure, the protruding portion 122 and the protruding portion 122A are in contact with the inner peripheral wall 101e of the closed container 101 for the P-phase divided cores.
  • the stator core 200 has a shrinkage fitting allowance when all of all M divided iron cores 120 come into contact with the inner peripheral wall 101e at the contact point with the closed container 101, as in the shrinkage fitting allowance of a conventional compressor. In comparison, it has an outer peripheral wall 1a that is N / P times thicker as a shrink fitting allowance. In the case of the compressor 150 having such a structure, the stator 1 having the outer diameter of the contact point with the closed container 101 having a shrink fitting allowance N / P times that of the conventional compressor has a shrink fitting stress. The variation can be P / N times.
  • the configuration shown in the above embodiment is an example, and can be combined with another known technique, or a part of the configuration may be omitted or changed without departing from the gist. It is possible.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

La présente invention concerne un noyau cylindrique de stator qui est fretté sur un récipient hermétique constituant le carter d'un compresseur, puis serti. Le noyau de stator est muni d'une pluralité de noyaux divisés comprenant une partie de culasse arrière constituant la paroi circonférentielle extérieure du noyau de stator et une partie de dent dépassant de la partie de culasse arrière, liés de manière mobile en rotation et disposés en une forme annulaire. Lorsque la pluralité de noyaux divisés totalise M noyaux divisés constituant une structure à N phases, la pluralité de noyaux divisés comporte les noyaux divisés correspondant à P phases, dont des premières parties de contact touchent la paroi circonférentielle intérieure du récipient hermétique, et auxquels la paroi circonférentielle extérieure sert de tolérance de rétraction présentant une épaisseur de N/P fois en comparaison d'une tolérance de rétraction lorsque la totalité des M noyaux divisés entre en contact avec la paroi circonférentielle intérieure dans les premières parties de contact.
PCT/JP2019/025528 2019-06-27 2019-06-27 Noyau de stator, stator, moteur électrique, et compresseur WO2020261467A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021528769A JP7150174B2 (ja) 2019-06-27 2019-06-27 固定子鉄心、固定子、電動機、及び、圧縮機
PCT/JP2019/025528 WO2020261467A1 (fr) 2019-06-27 2019-06-27 Noyau de stator, stator, moteur électrique, et compresseur

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PCT/JP2019/025528 WO2020261467A1 (fr) 2019-06-27 2019-06-27 Noyau de stator, stator, moteur électrique, et compresseur

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008193778A (ja) * 2007-02-02 2008-08-21 Mitsubishi Electric Corp 固定子及び密閉型圧縮機及び回転機
WO2016063576A1 (fr) * 2014-10-22 2016-04-28 三菱電機株式会社 Compresseur et son procédé de fabrication

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008193778A (ja) * 2007-02-02 2008-08-21 Mitsubishi Electric Corp 固定子及び密閉型圧縮機及び回転機
WO2016063576A1 (fr) * 2014-10-22 2016-04-28 三菱電機株式会社 Compresseur et son procédé de fabrication

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