WO2023203709A1 - Rotor de moteur électrique, moteur électrique, compresseur et dispositif à cycle de réfrigération - Google Patents

Rotor de moteur électrique, moteur électrique, compresseur et dispositif à cycle de réfrigération Download PDF

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Publication number
WO2023203709A1
WO2023203709A1 PCT/JP2022/018375 JP2022018375W WO2023203709A1 WO 2023203709 A1 WO2023203709 A1 WO 2023203709A1 JP 2022018375 W JP2022018375 W JP 2022018375W WO 2023203709 A1 WO2023203709 A1 WO 2023203709A1
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WO
WIPO (PCT)
Prior art keywords
end plate
electromagnetic steel
rotor core
insertion hole
diameter portion
Prior art date
Application number
PCT/JP2022/018375
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English (en)
Japanese (ja)
Inventor
一弥 熊谷
敏充 飯田
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 PCT/JP2022/018375 priority Critical patent/WO2023203709A1/fr
Priority to JP2024515994A priority patent/JPWO2023203709A1/ja
Publication of WO2023203709A1 publication Critical patent/WO2023203709A1/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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]

Definitions

  • the present disclosure relates to a rotor of an electric motor, an electric motor, a compressor, and a refrigeration cycle device.
  • an iron core laminate made up of a plurality of disk-shaped core punched plates, a permanent magnet attached to the iron core laminate, and an axial direction of the permanent magnet.
  • an end plate formed of a disk-shaped iron plate that covers both ends for example, see Patent Document 1.
  • the rotor described in Patent Document 1 further includes a rivet that caulks and fixes the core laminate and the end plate, and a rivet that is provided on the side opposite to the core laminate side of one end plate and fixed together with the rivet. It is equipped with a balancer and a balancer.
  • the performance of electric motors has improved. Therefore, if the surplus generated by improving the performance of electric motors is allocated to ⁇ cost reduction'', for example, the thickness of the iron core laminate may be reduced, or the outer diameter of the rotating shaft may be reduced to reduce mechanical loss in the compressor. One example is to make it smaller.
  • the present disclosure has been made to solve such problems, and provides a rotor for an electric motor that can ensure reliability through shrink fitting between the rotor and the rotating shaft without reducing magnetic force. , an electric motor, a compressor, and a refrigeration cycle device.
  • a rotor of an electric motor includes: a first inner diameter portion fastened to a rotating shaft; a first rivet insertion hole extending in the axial direction of the rotating shaft and spaced apart in a circumferential direction; an annular first rotor core electromagnetic steel plate having a magnet insertion hole extending in the axial direction and arranged in a plurality of layers in the axial direction; and a magnet inserted into the magnet insertion hole.
  • annular second rotor core electromagnetic steel plate arranged in the axial direction, and an annular second rotor core electromagnetic steel plate arranged between the first rotor core electromagnetic steel plate and the second rotor core electromagnetic steel plate in the axial direction
  • An annular third rotor core electromagnetic steel plate having a third inner diameter portion fastened to the rotating shaft and a third outer diameter portion located radially inward than the first rivet insertion hole; , disposed on the outer periphery of the third outer diameter section, made of a non-magnetic material, disposed at one end of the magnet insertion hole in the axial direction, having an annular shape and extending in the axial direction.
  • first end plate rivet insertion holes arranged at intervals in the circumferential direction of the annular semicircular portion, and the remaining annular semicircular ring corresponding to the first end plate rivet insertion holes; a first end plate portion having second end plate rivet insertion holes spaced apart in the circumferential direction of the portion and extending in the axial direction; a second end plate disposed at the other end of the hole in the axial direction, having an annular shape, extending in the axial direction, and having end plate rivet insertion holes arranged at intervals in the circumferential direction; the first rivet insertion hole, the second rivet insertion hole, the first end plate rivet insertion hole or the second end plate rivet insertion hole, and the end plate rivet insertion hole.
  • the first outer diameter portion which includes a plurality of inserted rivets and forms the outer periphery of the first rotor core electromagnetic steel sheet, is connected to the second outer diameter portion that forms the outer periphery of the second rotor core electromagnetic steel sheet.
  • the second outer diameter portion is located radially inward from the magnet insertion hole and radially outward from the first rivet insertion hole. It is something that exists.
  • the electric motor according to the present disclosure includes the rotor of the electric motor described above, and a stator that is provided on the outer periphery of the rotor and rotates the rotor by magnetic action.
  • a compressor according to the present disclosure includes: the above-mentioned electric motor; a compression mechanism section that is driven by the electric motor and compresses fluid drawn in from the outside; and a closed container that houses the electric motor and the compression mechanism section. It is equipped with the following.
  • a refrigeration cycle device includes the above compressor, an outdoor heat exchanger, a pressure reducer, and an indoor heat exchanger.
  • the rotor of the electric motor, the electric motor, the compressor, and the refrigeration cycle device according to the present disclosure are provided by fastening the electromagnetic steel sheets for the first to third rotor cores to the rotating shaft, thereby reducing the thermal resistance between the rotor and the rotating shaft.
  • both ends in the axial direction of the magnet inserted into the magnet insertion hole of the first rotor core electromagnetic steel plate are connected to the first and second end plate portions made of a non-magnetic material. By covering it, it is possible to suppress the generation of leakage magnetic flux and suppress a decrease in magnetic force.
  • FIG. 1 is a cross-sectional view showing the configuration of a hermetic compressor 130 according to Embodiment 1.
  • FIG. 1 is a schematic configuration diagram showing the configuration of a refrigeration cycle device 200 in which a hermetic compressor 130 according to Embodiment 1 is mounted.
  • 5A is a top plan view
  • FIG. 1B is a vertical cross-sectional view
  • FIG. 3C is a bottom plan view, showing the configuration of a rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. FIG. 3 is a plan view showing the configuration of a first rotor core electromagnetic steel plate 301 provided in a rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 3 is a plan view showing the configuration of a second rotor core electromagnetic steel plate 302 provided in the rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 3 is a plan view showing the configuration of a third rotor core electromagnetic steel plate 303 provided in the rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 3 is a plan view showing the configuration of a fourth rotor core electromagnetic steel plate 304 provided in the rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 3 is a plan view showing the configuration of a first non-magnetic end plate 305 provided on a rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 3 is a plan view showing the configuration of a second non-magnetic end plate 306 provided on the rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 7A is a top plan view
  • FIG. 3B is a vertical sectional view
  • FIG. 7C is a bottom plan view, showing the configuration of rotor 5B of electric motor 103 according to Embodiment 2.
  • FIG. They are (a) a plan view seen from above, (b) a longitudinal sectional view, and (c) a plan view seen from below, showing the configuration of a rotor 5C of electric motor 103 according to Embodiment 3.
  • FIG. 7 is a plan view showing the configuration of a third non-magnetic end plate 307 provided on a rotor 5C of an electric motor 103 according to Embodiment 3.
  • FIG. FIG. 7A is a plan view viewed from above
  • FIG. 3B is a vertical sectional view
  • FIG. 7C is a plan view viewed from below, showing the configuration of rotor 5D of electric motor 103 according to Embodiment 4.
  • FIG. 7A is a plan view viewed from above
  • FIG. 3B is a vertical sectional view
  • FIG. 7C is a plan view viewed from below, showing the configuration of rotor 5D of electric motor 103 according to Embodiment 4.
  • FIG. 7A is a plan view viewed from above
  • FIG. 3B is a vertical sectional view
  • FIG. 7C is a plan view viewed from below, showing the configuration of rotor 5D of electric motor 103 according to Embodiment 4.
  • FIG. 7A is a plan view
  • FIG. 1 is a cross-sectional view showing the configuration of a hermetic compressor 130 according to the first embodiment.
  • a one-cylinder rotary compressor will be described as an example of the hermetic compressor 130.
  • the hermetic compressor 130 is a fluid machine that sucks low-temperature and low-pressure refrigerant inside, compresses the sucked refrigerant, and discharges high-temperature and high-pressure refrigerant to the outside.
  • the hermetic compressor 130 includes a hermetic container 101 forming an outer shell, an electric motor 103 having a stator 1 and a rotor 5A, a rotating shaft 104 that transmits the driving force of the electric motor 103, and a rotating shaft 104 that transmits the driving force of the electric motor 103.
  • a compression mechanism section 102 that compresses refrigerant using a driving force transmitted from a shaft 104 is provided.
  • Rotating shaft 104 is sometimes called a crankshaft.
  • the airtight container 101 is composed of an upper container 101a and a lower container 101b.
  • the upper container 101a has a bottomed cylindrical shape with an open bottom or a deformed dome shape.
  • the lower container 101b has a bottomed cylindrical shape with an open top surface.
  • the upper container 101a is disposed on the open upper surface of the lower container 101b, and seals the upper surface.
  • the closed container 101 is not limited to being formed from two components, the upper container 101a and the lower container 101b, but may be formed from three or more components.
  • an electric motor 103 Inside the airtight container 101, an electric motor 103, a rotating shaft 104, and a compression mechanism section 102 are housed.
  • the electric motor 103 is housed inside and above the closed container 101 .
  • the compression mechanism section 102 is housed below inside the closed container 101.
  • the compression mechanism section 102 and the electric motor 103 are connected via a rotating shaft 104.
  • the rotating shaft 104 includes a main shaft part 104a fixed to the rotor 5A of the electric motor 103, a counter shaft part 104b provided on the opposite side of the main shaft part 104a with the compression mechanism part 102 in between, and the main shaft part 104a and the counter shaft part. 104b.
  • the rotating shaft 104 is formed in the order of a main shaft part 104a, an eccentric shaft part 104c, and a sub-shaft part 104b from above to below the closed container 101 in the axial direction.
  • the main shaft portion 104a is fitted into the center of the rotor 5A of the electric motor 103, and is fixed by shrink fitting.
  • the central axis of the eccentric shaft portion 104c is eccentric with respect to the central axes of the main shaft portion 104a and the sub-shaft portion 104b.
  • the compression mechanism section 102 compresses the low-pressure gas refrigerant drawn into the low-pressure space of the closed container 101 from the suction connecting pipe 128 into high-pressure gas refrigerant using the rotational driving force supplied from the electric motor 103.
  • the high-pressure gas refrigerant compressed by the compression mechanism section 102 is discharged into the closed container 101 from above the compression mechanism section 102 .
  • the compression mechanism section 102 includes a cylinder 105, a main bearing 106, a sub-bearing 107, and a rolling piston 109.
  • the outer peripheral portion of the cylinder 105 is fixed to the closed container 101 with bolts or the like.
  • the cylinder 105 has a hollow cylindrical shape, and the hollow interior constitutes a cylinder chamber 105a.
  • the cylinder chamber 105a is open at both ends in the axial direction of the rotating shaft 104, and includes a main bearing 106 provided on the upper surface of the cylinder 105 and a sub-bearing 107 provided on the lower surface of the cylinder 105. It is blocked by. That is, the cylinder chamber 105a is a space surrounded by the inner peripheral surface of the cylinder 105, the inner wall surface of the main bearing 106, and the inner wall surface of the sub-bearing 107.
  • a vane groove (not shown) is formed in the cylinder 105, communicating with the cylinder chamber 105a and extending in a radial direction centered on the rotating shaft 104.
  • a vane (not shown) that partitions the cylinder chamber 105a into a suction chamber and a compression chamber is slidably fitted into the vane groove.
  • the suction chamber is a low pressure space and communicates with the suction connecting pipe 128.
  • the compression chamber is a high-pressure space and communicates with a discharge port (not shown) that discharges refrigerant to the outside of the cylinder chamber 105a.
  • one end of the vane that reciprocates in the radial direction inside the vane groove provided in the cylinder 105 contacts the outer periphery of the rolling piston 109 while compressing the compression chamber of the cylinder chamber 105a.
  • the rolling piston 109 is formed into a hollow cylindrical shape, and the eccentric shaft portion 104c of the rotating shaft 104 is slidably fitted into the hollow interior.
  • the rolling piston 109 is housed in the cylinder chamber 105a together with the eccentric shaft portion 104c.
  • the rotating shaft 104 is rotated by the drive of the electric motor 103, the rolling piston 109 rotates along the inner peripheral surface of the cylinder chamber 105a and compresses the refrigerant.
  • the secondary bearing 107 is formed into a substantially T-shape when viewed from the side.
  • the auxiliary bearing 107 is provided on the other end surface of the cylinder 105 on the opposite side to the side where the electric motor 103 is disposed, and closes the lower opening in the axial direction of the cylinder chamber 105a.
  • the sub-bearing 107 is fitted into the sub-shaft portion 104b of the rotating shaft 104, and rotatably supports the sub-shaft portion 104b.
  • the electric motor 103 includes a stator 1 and a rotor 5A.
  • As the electric motor 103 for example, a brushless DC motor is used.
  • the electric motor 103 uses electric power supplied from an external power source to generate rotational driving force on the rotating shaft 104 and transmits the rotational driving force to the compression mechanism section 102 via the rotating shaft 104.
  • the stator 1 has a cylindrical shape.
  • the stator 1 has a donut shape in plan view.
  • the stator 1 is fixed to the inner wall surface of the lower container 101b of the closed container 101.
  • the outer diameter of the stator 1 is larger than the inner diameter of the lower container 101b.
  • the stator 1 is shrink-fitted and fixed within the lower container 101b.
  • the stator 1 is constructed by laminating a plurality of stator core electromagnetic steel plates formed by punching thin electromagnetic steel plates.
  • the electromagnetic steel sheet for stator core is sometimes called a stator core sheet.
  • a coil 4 made of winding wire is wound around the teeth of the stator 1. Further, the coil 4 is provided with an insulating member 3 for insulating the coil 4 from the outside. Further, the stator 1 is provided with a lead wire 9 for supplying electric power from outside the sealed container 101. The lead wire 9 of the stator 1 is connected to a glass terminal 119 provided in the upper container 101a. The glass terminal 119 is placed above the upper container 101a of the closed container 101. The outer diameter of the stator 1 is larger than the inner diameter of the lower container 101b. The stator 1 is shrink-fitted and fixed within the lower container 101b.
  • the rotor 5A is arranged inside the stator 1.
  • the rotor 5A is rotatably provided facing the inner surface of the stator 1, and rotates by magnetic action.
  • the rotor 5A has a cylindrical shape.
  • a rotating shaft 104 is fitted into the center of the rotor 5A.
  • the rotor 5A is constructed by laminating a plurality of rotor core electromagnetic steel plates formed by punching thin electromagnetic steel plates.
  • the electromagnetic steel sheet for rotor core is sometimes called a rotor core sheet.
  • the rotor 5A includes a rotor core 21, a balance weight 25, and a rivet 26.
  • the rotor core 21 is attached to the rotating shaft 104.
  • the electric motor 103 rotationally drives the rotating shaft 104
  • the rotor core 21 of the rotor 5A rotates.
  • the inner diameter of the rotor core 21 is smaller than the outer diameter of the rotating shaft 104, and the rotor core 21 is fixed to the main shaft portion 104a of the rotating shaft 104 by shrink fitting.
  • the rotor core 21 has a magnet insertion hole 22 into which a permanent magnet is inserted, and a rivet hole 23 into which a rivet 26 is inserted.
  • the balance weight 25 has an upper balance weight 25a and a lower balance weight 25b.
  • the upper balance weight 25a and the lower balance weight 25b are arranged at both ends of the rotor core 21 in the axial direction, respectively.
  • the upper balance weight 25a and the lower balance weight 25b function as a balancer that reduces vibrations of the hermetic compressor 130. Further, the upper balance weight 25a and the lower balance weight 25b also serve to prevent the magnet 24 from scattering.
  • the upper balance weight 25a is arranged at the upper end of the rotor core 21 in the hermetic compressor 130.
  • the lower balance weight 25b is arranged at the lower end of the rotor core 21 in the hermetic compressor 130.
  • the magnet 24 is, for example, a permanent magnet.
  • the rivets 26 fix the upper balance weight 25a, the lower balance weight 25b, and the rotor core 21.
  • the rivet 26 is inserted into a rivet hole 23 provided in the rotor core 21.
  • the rivet 26 is a rod-shaped member, and has, for example, a cylindrical shape.
  • end plates are provided at both ends of the rotor core 21 in the axial direction to prevent the magnets 24 from scattering.
  • a first non-magnetic end plate 305 and a second non-magnetic end plate 306 constitute an "end plate".
  • the balance weight 25 and the "end plate” may be configured as the same component, or may be configured as separate components.
  • the fourth group 311 constitutes the balance weight 25. Therefore, FIG. 3, which will be described later, shows a case where the balance weight 25 and the "end plate" are configured as separate parts.
  • An accumulator (not shown) that stores liquid refrigerant and a suction muffler 127 that has the role of muffling refrigerant noise are provided adjacent to the closed container 101.
  • the closed container 101 is connected to a suction muffler 127 via a suction connecting pipe 128, and gas refrigerant is taken into the interior from the suction muffler 127.
  • the suction muffler 127 is fixed to the outer surface of the closed container 101 by welding or the like.
  • the suction muffler 127 is connected to the cylinder 105 of the compression mechanism section 102 via a suction connecting pipe 128.
  • the suction muffler 127 separates the low temperature and low pressure refrigerant sent from the refrigeration circuit into liquid refrigerant and gas refrigerant, prevents the liquid refrigerant from being sucked into the compression mechanism section 102 as much as possible, and stores the separated liquid refrigerant. It is set up for the purpose of This is because, in the hermetic compressor 130, if liquid refrigerant flows into the compression mechanism section 102 and is compressed, it may cause the compression mechanism section 102 to malfunction.
  • the suction muffler 127 also functions as a muffler that reduces or eliminates noise generated by the inflowing refrigerant.
  • a discharge pipe 129 is connected to the upper part of the upper container 101a of the closed container 101.
  • the discharge pipe 129 is a refrigerant pipe that discharges high-pressure gas refrigerant to the outside of the closed container 101 .
  • the discharge pipe 129 passes through the upper container 101a and is joined to the upper container 101a by, for example, brazing or resistance welding.
  • the refrigerant gas compressed by the cylinder 105 is discharged into the closed container 101, passes through the electric motor 103, and is sent out from the discharge pipe 129 to the four-way switching valve 133 of the refrigeration cycle device 200, which will be described later.
  • the hermetic compressor 130 may be a rotary compressor having a plurality of cylinders 105, such as a twin rotary compressor having two cylinders 105, or may have another structure. That is, the hermetic compressor 130 may be any hermetic compressor, such as a scroll compressor or a reciprocating compressor, in which the electric motor 103 is disposed inside the hermetic container 101, and its compression structure may be It doesn't matter.
  • FIG. 2 is a schematic configuration diagram showing the configuration of a refrigeration cycle apparatus 200 in which the hermetic compressor 130 according to the first embodiment is mounted.
  • the refrigeration cycle device 200 is, for example, an air conditioner.
  • the refrigeration cycle device 200 includes a hermetic compressor 130, a four-way switching valve 133, an outdoor heat exchanger 134, a pressure reducer 135, and an indoor heat exchanger 136. It is configured by sequentially connecting via piping to form a refrigerant circuit.
  • the suction muffler 127 is connected to the suction side of the hermetic compressor 130.
  • the four-way switching valve 133 is connected to the discharge side of the hermetic compressor 130 and switches the flow of refrigerant discharged from the hermetic compressor 130.
  • the indoor heat exchanger 136 is installed indoors, and the hermetic compressor 130, four-way switching valve 133, outdoor heat exchanger 134, and pressure reducer 135 are installed outdoors. installed in the device.
  • the outdoor heat exchanger 134 and the indoor heat exchanger 136 are, for example, fin-and-tube type heat exchangers including fins and heat transfer tubes.
  • the pressure reducer 135 is an expansion valve such as an electronic expansion valve, or a capillary tube.
  • the operation of the refrigeration cycle device 200 will be described using an example in which the refrigeration cycle device 200 is an air conditioner.
  • the four-way switching valve 133 is connected to the solid line side in FIG. 3.
  • the high-temperature, high-pressure refrigerant compressed by the hermetic compressor 130 flows to the indoor heat exchanger 136 .
  • the indoor heat exchanger 136 the refrigerant is condensed and liquefied. Thereafter, the liquefied refrigerant flows into the pressure reducer 135.
  • the inflowing refrigerant is throttled by the pressure reducer 135 to become a low-temperature, low-pressure, gas-liquid two-phase state, and flows into the outdoor heat exchanger 134 .
  • the refrigerant is evaporated and gasified.
  • the gasified refrigerant passes through the four-way switching valve 133 and the suction muffler 127 and returns to the hermetic compressor 130 again. That is, the refrigerant circulates as shown by solid arrows in FIG. Through this circulation, the refrigerant that has been sent to the outdoor heat exchanger 134 exchanges heat with the outside air in the outdoor heat exchanger 134, which is an evaporator, and absorbs heat, and the refrigerant that has absorbed heat is transferred to the indoor heat exchanger, which is a condenser. The air is sent to a container 136, where it exchanges heat with indoor air and warms the indoor air.
  • the four-way switching valve 133 When the air conditioner is in cooling operation, the four-way switching valve 133 is connected to the dashed line side in FIG.
  • the high-temperature, high-pressure refrigerant compressed by the hermetic compressor 130 flows to the outdoor heat exchanger 134 .
  • the refrigerant In the outdoor heat exchanger 134, the refrigerant is condensed and liquefied. Thereafter, the liquefied refrigerant flows into the pressure reducer 135.
  • the inflowing refrigerant is throttled by the pressure reducer 135 to become a low-temperature, low-pressure, gas-liquid two-phase state, and flows into the indoor heat exchanger 136. In the indoor heat exchanger 136, the refrigerant is evaporated and gasified.
  • the gasified refrigerant passes through the four-way switching valve 133 and the suction muffler 127 and returns to the hermetic compressor 130 again. That is, when the heating operation changes to the cooling operation, the indoor heat exchanger 136 changes from a condenser to an evaporator, and the outdoor heat exchanger 134 changes from an evaporator to a condenser. Therefore, the refrigerant circulates as shown by the broken line arrows in FIG. Through this circulation, the indoor heat exchanger 136, which is an evaporator, exchanges heat with the indoor air, absorbs heat from the indoor air, that is, cools the indoor air, and the absorbed refrigerant is transferred to the outdoor heat exchanger, which is a condenser. 134, where it exchanges heat with the outside air and radiates heat to the outside air.
  • the refrigerant generally used is R407C refrigerant, R410A refrigerant, or R32 refrigerant.
  • FIG. 3 is (a) a plan view seen from above, (b) a longitudinal sectional view, and (c) a plan view seen from below, showing the configuration of rotor 5A of electric motor 103 according to the first embodiment.
  • FIG. 3(b) shows a sectional view taken along line AA in FIG. 3(a).
  • the rotor 5A is schematically illustrated in FIG. 1 for simplification of the drawing, the rotor 5A actually has the configuration shown in FIG. 3.
  • Typical compressor motor rotors ensure reliability against rotational movement and self-weight during compressor operation by the gripping force created by shrink-fitting that acts between the rotor and the main shaft of the rotating shaft.
  • the gripping force is proportional to the contact area of the shrink-fitted part.
  • Embodiment 1 a rotor 5A that can suppress the generation of leakage magnetic flux and improve the shrink-fitting stress between the rotor 5A and the rotating shaft 104 without reducing the magnetic force will be described. .
  • the rotor 5A includes a fourth group 311, a third group 310, a second group 309, a first group 308, a second group 309, a third group 310, a fourth group 311, and a rivet. 26 (see FIG. 1).
  • the fourth group 311, the third group 310, the second group 309, the first group 308, the second group 309, the third group 310, and the fourth group are arranged in the order of group 311.
  • FIG. 3 is configured by laminating a plurality of first rotor core electromagnetic steel sheets 301 shown in FIG. 4 in the axial direction.
  • FIG. 4 is a plan view showing the configuration of the first rotor core electromagnetic steel plate 301 provided in the rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 4 shows the state of the first rotor core electromagnetic steel sheet 301 viewed from above.
  • the first rotor core electromagnetic steel sheet 301 is a plate-like member having an annular shape in plan view.
  • the first rotor core electromagnetic steel sheet 301 has a first inner diameter portion 3011 that can be fastened to the rotating shaft 104 by shrink fitting, a first lamination caulking portion 3012, a first rivet insertion hole 3013, and a magnet insertion hole 3014. , and a first outer diameter portion 3015.
  • the first inner diameter portion 3011 is a through hole into which the rotating shaft 104 is fitted.
  • the first inner diameter portion 3011 has a circular shape in plan view.
  • the first inner diameter portion 3011 is arranged at the center of the first rotor core electromagnetic steel sheet 301.
  • the center of the first inner diameter portion 3011 coincides with the axis of the rotating shaft 104.
  • the rotating shaft 104 is inserted into the first inner diameter portion 3011 and fastened thereto.
  • a plurality of first lamination caulking portions 3012 are arranged along the outer periphery of the first inner diameter portion 3011 at intervals in the circumferential direction.
  • the first lamination caulking portion 3012 is located on the radially outer side of the first inner diameter portion 3011.
  • the first lamination caulking portion 3012 has, for example, a rectangular shape in plan view.
  • the plurality of first rotor core electromagnetic steel sheets 301 are fastened and positioned by the first lamination caulking portion 3012.
  • the first rivet insertion hole 3013 is a through hole into which the rivet 26 is inserted.
  • the first rivet insertion hole 3013 has a circular shape in plan view.
  • a plurality of first rivet insertion holes 3013 are arranged along the outer periphery of the first inner diameter portion 3011 at intervals in the circumferential direction.
  • the first rivet insertion hole 3013 is located radially outward from the first lamination caulking part 3012.
  • the first rivet insertion hole 3013 is arranged between two first lamination caulking parts 3012 arranged adjacently in the circumferential direction.
  • the magnet insertion hole 3014 is a through hole into which the magnet 24 is inserted.
  • the magnet insertion hole 3014 has, for example, a rectangular shape in plan view.
  • a plurality of magnet insertion holes 3014 are arranged along the outer periphery of the first outer diameter portion 3015 at intervals in the circumferential direction.
  • the magnet insertion hole 3014 is located radially outward from the first rivet insertion hole 3013 and radially inward from the first outer diameter portion 3015.
  • the longitudinal side of the magnet insertion hole 3014 extends in a direction intersecting the radial direction of the first rotor core electromagnetic steel sheet 301.
  • the electromagnetic steel sheet 301 for the first rotor core has a distance radially outward from the axis of the rotating shaft 104 such that the first inner diameter portion 3011 ⁇ first laminated caulked portion 3012 ⁇ first rivet insertion hole 3013 ⁇ magnet
  • the insertion hole 3014 is configured to have a relationship of "first outer diameter section 3015".
  • the distance radially outward from the axis of the rotating shaft 104" refers to the distance between the position closest to the axis of the rotating shaft 104 of each part and the axis of the rotating shaft 104. It is distance. Therefore, in the case of the first rivet insertion hole 3013, the distance L1 is between the position of the outer diameter part of the first rivet insertion hole 3013 closest to the axis of the rotation shaft 104 and the axis of the rotation shaft 104. . In the case of the magnet insertion hole 3014, the distance is L2 between the position of one side of the magnet insertion hole 3014 closest to the axis of the rotation shaft 104 and the axis of the rotation shaft 104.
  • FIG. 6 is a plan view showing the configuration of the third rotor core electromagnetic steel plate 303 provided in the rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 6 shows a state in which the third rotor core electromagnetic steel sheet 303 is viewed from above.
  • FIG. 8 is a plan view showing the configuration of the first non-magnetic end plate 305 provided on the rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 8 shows the first non-magnetic end plate 305 viewed from above.
  • FIG. 9 is a plan view showing the configuration of the second non-magnetic end plate 306 provided on the rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 9 shows the second non-magnetic end plate 306 viewed from above.
  • the second group 309 shown in FIG. 3 includes a first non-magnetic end plate 305 shown in FIG. 8, a second non-magnetic end plate 306 shown in FIG. 9, and a third rotor core electromagnetic steel plate shown in FIG. 303.
  • the third rotor core electromagnetic steel sheet 303 is a plate-like member having an annular shape in plan view.
  • the third rotor core electromagnetic steel sheet 303 has a third inner diameter part 3031 that can be fastened to the rotating shaft 104 by shrink fitting, a third lamination caulking part 3032, and a third outer diameter part 3035.
  • the rotating shaft 104 is inserted into and fastened to the third inner diameter portion 3031.
  • the third outer diameter portion 3035 is located radially inward from the position of the first rivet insertion hole 3013 (see FIG. 4) and radially outward from the first lamination caulking portion 3012 (see FIG. 4).
  • a plurality of third lamination caulking portions 3032 are arranged along the outer periphery of the third inner diameter portion 3031 at intervals in the circumferential direction.
  • the third lamination caulking portion 3032 has, for example, a rectangular shape in plan view.
  • the third laminating caulking portion 3032 is located radially outward from the third inner diameter portion 3031.
  • the position of the third lamination caulking part 3032 matches the position of the first lamination caulking part 3012.
  • the third rotor core electromagnetic steel sheet 303 has a distance radially outward from the axis of the rotating shaft 104 such that "third inner diameter part 3031 ⁇ third laminated caulking part 3032 ⁇ third outer diameter part 3035". configured to be in a relationship.
  • the first non-magnetic end plate 305 is a plate-like member having a semicircular shape in plan view.
  • the first non-magnetic end plate 305 is made of a non-magnetic material.
  • a non-magnetic material is a material that is not affected by a magnetic field and is not magnetized.
  • the first non-magnetic end plate 305 has an arcuate first end plate inner diameter portion 3051 that contacts the third outer diameter portion 3035 of the third rotor core electromagnetic steel sheet 303, and a first end plate rivet insertion hole 3053. , a first end plate outer diameter portion 3055 having a circular arc shape, and a connecting portion 3056 having a linear shape.
  • the first end plate rivet insertion hole 3053 is a circular through hole into which the rivet 26 is inserted.
  • a plurality of first end plate rivet insertion holes 3053 are arranged along the first end plate inner diameter portion 3051 of the semicircular first non-magnetic end plate 305 at intervals in the circumferential direction.
  • the first end plate rivet insertion hole 3053 is located radially outward from the first end plate inner diameter portion 3051.
  • the position of the first end plate rivet insertion hole 3053 matches the position of the first rivet insertion hole 3013.
  • the first end plate outer diameter portion 3055 is located radially outward from the magnet insertion hole 3014 (see FIG. 4).
  • the connecting portion 3056 is disposed adjacent to the first end plate inner diameter portion 3051 and the first end plate outer diameter portion 3055, and connects the first end plate inner diameter portion 3051 and the first end plate outer diameter portion 3055. There is.
  • the second non-magnetic end plate 306 is a plate-like member having a semicircular shape in plan view.
  • the second non-magnetic end plate 306 is made of a non-magnetic material.
  • the second non-magnetic end plate 306 has an arc-shaped second end plate inner diameter portion 3061 that contacts the third outer diameter portion 3035 of the third rotor core electromagnetic steel sheet 303, and a second end plate rivet insertion hole 3063. , and an arcuate second end plate outer diameter portion 3065.
  • the second end plate rivet insertion hole 3063 is a circular through hole into which the rivet 26 is inserted.
  • a plurality of second end plate rivet insertion holes 3063 are arranged along the second end plate inner diameter portion 3061 of the semicircular second non-magnetic end plate 306 at intervals in the circumferential direction.
  • the second end plate rivet insertion hole 3063 is located radially outward from the second end plate inner diameter portion 3061.
  • the position of the second end plate rivet insertion hole 3063 matches the position of the first rivet insertion hole 3013 (see FIG. 4).
  • the second end plate outer diameter portion 3065 is located radially outward from the magnet insertion hole 3014 (see FIG. 4).
  • the connecting portion 3066 is disposed adjacent to the second end plate inner diameter portion 3061 and the second end plate outer diameter portion 3065, and connects the second end plate inner diameter portion 3061 and the second end plate outer diameter portion 3065. There is.
  • the first non-magnetic end plate 305 and the second non-magnetic end plate 306 are arranged to face each other so that the connecting portion 3056 and the connecting portion 3066 are in contact with each other, thereby forming an annular shape. has been done.
  • the first end plate inner diameter part 3051 and the second end plate inner diameter part 3061 have a circular inner diameter. form a section.
  • the third rotor core electromagnetic steel plate 303 is arranged inside the inner diameter portion. At this time, the third outer diameter portion 3035 of the third rotor core electromagnetic steel sheet 303 contacts the first end plate inner diameter portion 3051 and the second end plate inner diameter portion 3061.
  • the second end plate rivet insertion holes 3063 are arranged at intervals in the circumferential direction, corresponding to the positions of the first end plate rivet insertion holes 3053. Therefore, when the first non-magnetic end plate 305 and the second non-magnetic end plate 306 are arranged to face each other, the second end plate rivet insertion hole 3063 and the first end plate rivet insertion hole 3053 are The connecting portions 3056 and 3066 are arranged in symmetrical positions with respect to the axis of symmetry.
  • the magnets 24 are inserted into magnet insertion holes 3014 provided in the first rotor core electromagnetic steel sheet 301 of the first group 308. Since the first rotor core electromagnetic steel sheets 301 are laminated in the axial direction, when the first group 308 is viewed as a whole, the magnet insertion holes 3014 extend in the axial direction, as shown in FIG.
  • the first non-magnetic end plate 305 is arranged at the upper end and lower end of the magnet insertion hole 3014 extending in the axial direction.
  • the second non-magnetic end plate 306 is arranged at the upper end and lower end of the magnet insertion hole 3014 extending in the axial direction.
  • first end 308a the upper end of the first group 308 in the axial direction
  • second end 308b the lower end of the first group 308 in the axial direction
  • the first non-magnetic end plate 305 and the second non-magnetic end plate 306 are provided on both the first end 308a side and the second end 308b side of the first group 308. Further, as shown in FIG. 3, the first end plate outer diameter portion 3055 and the second end plate outer diameter portion 3065 are aligned in the radial position with the first outer diameter portion 3015.
  • first non-magnetic end plate 305 and the second non-magnetic end plate 306 arranged on the "first end 308a" side of the first group 308 are sometimes referred to as "first end plate section 401".
  • first end plate portion 401 is arranged on the outer periphery of the third outer diameter portion 3035 of the third rotor core electromagnetic steel sheet 303.
  • first non-magnetic end plate 305 and the second non-magnetic end plate 306 arranged on the "second end 308b" side of the first group 308 are sometimes referred to as a "second end plate section 402". .
  • the second end plate portion 402 is arranged on the outer periphery of the third outer diameter portion 3035 of the third rotor core electromagnetic steel sheet 303.
  • the number of the first non-magnetic end plates 305 may be one, or a plurality of them may be laminated. Further, the number of the second non-magnetic end plates 306 may be one, or a plurality of them may be stacked. Furthermore, the third rotor core electromagnetic steel plate 303 may be one piece or may be laminated in plurality. However, as shown in FIG. It's the same.
  • FIG. 5 is a plan view showing the configuration of the second rotor core electromagnetic steel plate 302 provided in the rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 5 shows the state of the second rotor core electromagnetic steel sheet 302 viewed from above.
  • the second rotor core electromagnetic steel sheet 302 is a plate-like member having an annular shape in plan view.
  • the second rotor core electromagnetic steel sheet 302 has a second inner diameter part 3021 that can be fastened to the rotating shaft 104 by shrink fitting, a second lamination caulking part 3022, a second rivet insertion hole 3023, and a second outer diameter part. 3025.
  • the second outer diameter portion 3025 is located radially inward from the magnet insertion hole 3014 (see FIG. 4) and radially outward from the first rivet insertion hole 3013 (see FIG. 4). . Therefore, as shown in FIG. 3, the second rotor core electromagnetic steel plates 302 are not provided above and below the magnets 24 in the axial direction. Thus, in the first embodiment, no electromagnetic steel sheets other than the first group 308 are provided near the magnet 24. Therefore, the generation of leakage magnets can be further suppressed.
  • the second inner diameter portion 3021 is a through hole into which the rotating shaft 104 is fitted.
  • the second inner diameter portion 3021 has a circular shape in plan view.
  • the second inner diameter portion 3021 is arranged at the center of the second rotor core electromagnetic steel sheet 302.
  • the center of the second inner diameter portion 3021 coincides with the axis of the rotating shaft 104.
  • the rotating shaft 104 is inserted into the second inner diameter portion 3021 and fastened thereto.
  • a plurality of second lamination caulking portions 3022 are arranged along the outer periphery of the second inner diameter portion 3021 at intervals in the circumferential direction.
  • the second lamination caulking portion 3022 has, for example, a rectangular shape in plan view.
  • the second lamination caulking portion 3022 is located radially outward from the second inner diameter portion 3021.
  • the second rivet insertion hole 3023 is a through hole into which the rivet 26 is inserted.
  • the second rivet insertion hole 3023 has a circular shape in plan view.
  • a plurality of second rivet insertion holes 3023 are arranged along the outer periphery of the second inner diameter portion 3021 at intervals in the circumferential direction.
  • the second rivet insertion hole 3023 is located radially outward from the second lamination caulking part 3022.
  • the second rivet insertion hole 3023 is arranged between two second lamination caulking parts 3022 that are arranged adjacent to each other in the circumferential direction.
  • the position of the second rivet insertion hole 3023 matches the position of the first rivet insertion hole 3013 (see FIG. 4).
  • the position of the second lamination caulking part 3022 matches the position of the first lamination caulking part 3012 (see FIG. 4).
  • the second rotor core electromagnetic steel sheet 302 has a distance radially outward from the axis of the rotating shaft 104 such that the second inner diameter portion 3021 ⁇ the second laminated caulked portion 3022 ⁇ the second rivet insertion hole 3023 ⁇ the second rivet insertion hole 3023 ⁇ the second rivet insertion hole 3023 2 outer diameter portions 3025''.
  • the fourth group 311 shown in FIG. 3 is configured by laminating a plurality of fourth rotor core electromagnetic steel plates 304 shown in FIG. 7.
  • FIG. 7 is a plan view showing the configuration of the fourth rotor core electromagnetic steel plate 304 provided in the rotor 5A of the electric motor 103 according to the first embodiment.
  • FIG. 7 shows the fourth rotor core electromagnetic steel sheet 304 viewed from above.
  • the fourth rotor core electromagnetic steel sheet 304 has a semicircular shape in plan view.
  • the fourth rotor core electromagnetic steel plate 304 has an arc-shaped fourth inner diameter portion 3041, a fourth laminated caulking portion 3042, a third rivet insertion hole 3043, an arc-shaped fourth outer diameter portion 3045, and a straight line. 3047.
  • the rotation shaft 104 is brought into contact with the fourth inner diameter portion 3041.
  • the rotation shaft 104 is fastened to the fourth inner diameter portion 3041.
  • the third rivet insertion hole 3043 is a circular through hole into which the rivet 26 is inserted.
  • a plurality of third rivet insertion holes 3043 are arranged along the fourth inner diameter portion 3041 at intervals in the circumferential direction.
  • the third rivet insertion hole 3043 is located radially outward from the fourth inner diameter portion 3041.
  • the position of the third rivet insertion hole 3043 matches the position of the first rivet insertion hole 3013 (see FIG. 4).
  • the fourth outer diameter portion 3045 is located radially inward from the magnet insertion hole 3014 (see FIG. 4) and radially outward from the first rivet insertion hole 3013 (see FIG. 4). .
  • the radial position of the fourth outer diameter portion 3045 coincides with the second outer diameter portion 3025, as shown in FIG.
  • the straight portion 3047 is arranged adjacent to the fourth inner diameter portion 3041 and the fourth outer diameter portion 3045, and connects the fourth inner diameter portion 3041 and the fourth outer diameter portion 3045.
  • a plurality of fourth lamination caulking portions 3042 are arranged along the outer periphery of the fourth inner diameter portion 3041 at intervals in the circumferential direction.
  • the fourth lamination caulking portion 3042 has, for example, a rectangular shape in plan view.
  • the fourth lamination caulking part 3042 is located on the radially outer side of the fourth inner diameter part 3041.
  • the position of the fourth lamination caulking part 3042 matches the position of the first lamination caulking part 3012 (see FIG. 4).
  • the fourth rotor core electromagnetic steel sheet 304 has a distance radially outward from the axis of the rotating shaft 104 such that the fourth inner diameter portion 3041 ⁇ fourth laminated caulked portion 3042 ⁇ third rivet insertion hole 3043 ⁇ third rivet insertion hole 3043 4 outer diameter portions 3045''.
  • the fourth group 311, the third group 310, the second group 309, the first group 308, the second group 309, the third group 310, and the fourth group 311 are fixed with rivets 26. ing. That is, the rivet 26 is inserted into the third rivet insertion hole 3043, the second rivet insertion hole 3023, the first end plate rivet insertion hole 3053, or the second end plate rivet insertion hole 3063, the first rivet insertion hole 3013, or the first end plate rivet. It is inserted into the insertion hole 3053 or the second end plate rivet insertion hole 3063, the second rivet insertion hole 3023, and the third rivet insertion hole 3043 in order to communicate with each other. Thereby, the fourth group 311, the third group 310, the second group 309, the first group 308, the second group 309, the third group 310, and the fourth group 311 are fixed.
  • the fourth group 311, the third group 310, the second group 309, the first group 308, the second group 309, the third group 310, and the fourth group 311 are fixed by lamination caulking parts. That is, the fourth group 311, the third group 310, the second group 309, the first group 308, the second group 309, the third group 310, and the fourth group 311, the first lamination caulking part 3012, the second The lamination caulking part 3022, the third lamination caulking part 3032, and the fourth lamination caulking part 3042 are positioned and fastened to each other.
  • the fourth group 311, the third group 310, the second group 309, the first group 308, the second group 309, the third group 310, and the fourth group 311 are, for example, pressed by the same core press die, It is positioned and fastened by the lamination caulking part. Therefore, the inner and outer diameter dimensions of the fourth group 311, the third group 310, the second group 309, and the first group 308 can easily ensure the high accuracy required as a product.
  • the magnets 24 are inserted into the magnet insertion holes 3014 of the first group 308.
  • the magnet insertion holes 3014 of the first group 308 extend in the axial direction.
  • the magnet 24 has a rectangular shape in plan view.
  • the magnet 24 has a flat plate shape.
  • First non-magnetic end plates 305 are arranged at both ends of the magnet 24 in the axial direction, which is arranged on the left side of FIG.
  • second non-magnetic end plates 306 are arranged at both ends of the magnet 24 in the axial direction, which is arranged on the right side of FIG. In this way, end plates made of a non-magnetic material are arranged at both ends of the magnet 24 in the axial direction.
  • an electromagnetic steel plate that is a magnetic material is not arranged near the magnets 24 in the first group 308.
  • the magnetic flux from the magnets 24 can flow to the stator 1 without generating leakage flux from the second group 309 and the third group 310, making it possible to suppress a decrease in magnetic force compared to the conventional art.
  • a first group 308 composed of electromagnetic steel plates 301 for the first rotor core is provided with electromagnetic steel plates 302 for the second rotor core at both ends in the axial direction, that is, at the upper and lower ends.
  • a third group 310 is arranged.
  • a third rotor core electromagnetic steel plate 303 is arranged between the first rotor core electromagnetic steel plate 301 and the second rotor core electromagnetic steel plate 302.
  • the third rotor core electromagnetic steel sheet 303 connects the first rotor core electromagnetic steel sheet 301 and the second rotor core electromagnetic steel sheet 302.
  • the electromagnetic steel sheet 301 for the first rotor core, the electromagnetic steel sheet 303 for the third rotor core of the second group 309, and the electromagnetic steel sheet for the second rotor core of the third group 310 are used.
  • the inner diameter area of the rotor 5A as a whole increases.
  • the rotor 5A secures reliability against rotational movement and its own weight during operation of the hermetic compressor 130 by the gripping force exerted between the rotor 5A and the rotary shaft 104 due to shrink fitting.
  • the gripping force due to shrink fitting has a proportional relationship with the inner diameter area of the rotor 5A as a whole.
  • the first embodiment by increasing the inner diameter area of the rotor 5A as a whole, it is possible to improve the gripping force during shrink fitting.
  • the first to third rotor core electromagnetic steel sheets 301, 302, and 303 are pressed using the same core press die, and are fastened and positioned using the first to third lamination caulking parts 3012, 3022, and 3032. As a result, it is possible to ensure the required accuracy of the inner and outer diameter dimensions.
  • the rotor core is composed only of a portion corresponding to the first group 308 of the first embodiment. Therefore, the rotor and the rotating shaft are fastened together only at the portion corresponding to the first group 308 of the first embodiment. Therefore, the inner diameter area of the conventional general rotor is smaller than the inner diameter area of the first embodiment. Since the gripping force due to shrink fitting has a proportional relationship with the inner diameter area, the conventional general rotor has a smaller gripping force due to shrink fitting than the first embodiment.
  • a second group 309 , a third group 310 , and a fourth group 311 are added to the first group 308 .
  • the first group 308, the second group 309, the third group 310, and the fourth group 311 are fastened to the rotating shaft 104. Therefore, the inner diameter area of the rotor is significantly increased compared to conventional general rotors. As a result, the gripping force due to shrink fitting can be significantly improved.
  • the upper and lower ends of the magnet 24 cover the "first end plate part 401" and the "second end plate part 402."
  • the “first end plate portion 401” and the “second end plate portion 402” are made of a non-magnetic material. Therefore, generation of leakage magnetic flux can be suppressed.
  • the outer diameters of the third group 310 and the fourth group 311 are made smaller than the outer diameters of the first group 308 and the second group 309. As a result, the third group 310 and the fourth group 311 made of electromagnetic steel sheets are not provided in the vertical direction of the magnet 24. Therefore, the generation of leakage magnetic flux can be further suppressed.
  • the "first end plate part 401" and the “second end plate part 402" made of a non-magnetic material are provided at both ends of the magnet 24 in the axial direction. '', no electromagnetic steel plate is placed near the magnet 24. Therefore, it is possible to suppress a decrease in FLUX (that is, a decrease in flow) due to leakage magnetic flux.
  • the fourth rotor core electromagnetic steel plate 304 of the fourth group 311 is fastened to the rotating shaft 104 by shrink fitting.
  • the first group 308 it is possible to increase the area of the inner diameter portion of the rotor 5A as a whole, which is gripped by shrink fitting with the rotating shaft 104. Therefore, in the first embodiment, it is possible to improve the gripping force due to the shrink fit between the rotor 5A and the rotating shaft 104, and it is possible to suppress a decrease in the shrink fit stress.
  • Embodiment 1 it is possible to suppress a decrease in magnetic force due to the generation of leakage magnetic flux, and to improve the gripping force between the rotor 5A and the rotating shaft 104. As a result, reliability with respect to the load torque and dead weight of the hermetic compressor 130 during operation can be improved.
  • the fourth group 311 is arranged on the opposite side of the third group 310 to the side where the first group 308 is arranged. Specifically, for the third group 310 disposed on the "first end 308a" side of the first group 308, the fourth group 311 is disposed above the third group 310, and the fourth group 311 is disposed above the third group 310. With respect to the third group 310 disposed on the "second end 308b" side, a fourth group 311 is disposed below the third group 310. Further, the fourth group 311 disposed on the "first end 308a" side is disposed on the right side of the paper in FIG.
  • the fourth group 311 disposed on the "second end 308b" side is placed on the left side of.
  • the fourth group 311 is arranged to be left and right, with the "first end 308a" side and the "second end 308b” side.
  • the fourth group 311 functions as a balancer, it is possible to reduce vibrations of the hermetic compressor 130.
  • the fourth group 311 constitutes the balance weight 25 shown in FIG.
  • FIG. 10 is (a) a plan view seen from above, (b) a longitudinal sectional view, and (c) a plan view seen from below, showing the configuration of rotor 5B of electric motor 103 according to the second embodiment.
  • FIG. 10(b) shows a cross-sectional view taken along line BB in FIG. 10(a).
  • the fourth group 311 is omitted from the configuration of the first embodiment shown in FIG. That is, in the rotor 5B according to the second embodiment, the fourth group 311 is not provided. Therefore, as shown in FIG. 10, the rotor 5B according to the second embodiment includes a third group 310, a second group 309, a first group 308, a second group 309, a third group 310, magnets 24, and A rivet 26 is provided. Since the other configurations are the same as those in Embodiment 1, they are denoted by the same reference numerals, and the description thereof will be omitted here.
  • the third group 310, the second group 309, the first group 308, the second group 309, and the third group 310 are arranged in this order from the top. ing.
  • the third group 310, the second group 309, the first group 308, the second group 309, and the third group 310 are the third rivet insertion hole 3043, the second rivet insertion hole 3023, the first end plate rivet insertion hole 3053, or the Communicates with the second end plate rivet insertion hole 3063, the first rivet insertion hole 3013, the first end plate rivet insertion hole 3053, or the second end plate rivet insertion hole 3063, the second rivet insertion hole 3023, and the third rivet insertion hole 3043. It is fixed with a rivet 26 inserted.
  • the "first end plate part 401" and the “second end plate part 402" made of a non-magnetic material are provided at both ends of the magnet 24 in the axial direction. '', no electromagnetic steel plate is placed near the magnet 24. Therefore, it is possible to suppress a decrease in FLUX (that is, a decrease in flow) due to leakage magnetic flux.
  • the first rotor core electromagnetic steel sheet 301 of the first group 308, the third rotor core electromagnetic steel sheet 303 of the second group 309, and the second rotor core electromagnetic steel sheet 302 of the third group 310 It is fastened to the rotating shaft 104 by shrink fitting.
  • Embodiment 2 as in Embodiment 1, the reduction in magnetic force due to the generation of leakage magnetic flux is suppressed, and the gripping force between rotor 5B and rotating shaft 104 is improved. be able to. As a result, reliability with respect to the load torque and dead weight of the hermetic compressor 130 during operation can be improved. Further, since the fourth group 311 is not provided, the number of steps in the manufacturing process of the electric motor 103 is reduced, making the manufacturing process easier and reducing the manufacturing cost of the electric motor 103.
  • FIG. 11 is (a) a plan view seen from above, (b) a longitudinal sectional view, and (c) a plan view seen from below, showing the configuration of rotor 5C of electric motor 103 according to the third embodiment.
  • FIG. 11(b) shows a cross-sectional view taken along the line CC in FIG. 11(a).
  • FIG. 12 is a plan view showing the configuration of the third non-magnetic end plate 307 provided on the rotor 5C of the electric motor 103 according to the third embodiment.
  • FIG. 12 shows the third non-magnetic end plate 307 viewed from above.
  • the present invention is not limited thereto, and the second group 309 and the third group 310 may be provided on at least one of the "first end 308a" side and the "second end 308b" side of the first group 308. You can also do this.
  • a third group A non-magnetic end plate 307 is provided instead of the second group 309 and the third group 310 that were provided on the "second end 308b" side of the rotor 5A in the first embodiment. Furthermore, in the third embodiment, the fourth group 311 that was provided on the "second end 308b" side of the rotor 5A in the first embodiment is not installed.
  • the rotor 5C of the third embodiment includes a fourth group 311, a third group 310, a second group 309, a first group 308, a third non-magnetic end plate 307, and a magnet 24. , and a rivet 26.
  • the third non-magnetic end plate 307 is made of a non-magnetic material.
  • the first non-magnetic end plate 305 and the second non-magnetic end plate 306 of the second group 309 constitute the “second end plate portion 402”.
  • the third non-magnetic end plate 307 constitutes the "second end plate part 402".
  • Embodiment 3 The other configurations of Embodiment 3 are the same as Embodiment 1, so they are shown with the same reference numerals, and their explanation will be omitted here.
  • the third non-magnetic end plate 307 has an annular shape in plan view.
  • the third non-magnetic end plate 307 has a third end plate inner diameter portion 3071 through which the rotating shaft 104 is inserted, a third end plate rivet insertion hole 3073, and a third end plate outer diameter portion 3075.
  • the third end plate outer diameter portion 3075 is located radially outward from the magnet insertion hole 3014 (see FIG. 4).
  • the third end plate inner diameter portion 3071 is a through hole into which the rotating shaft 104 is fitted.
  • the third end plate inner diameter portion 3071 has a circular shape in plan view.
  • the third end plate inner diameter portion 3071 is arranged at the center of the third non-magnetic end plate 307.
  • the center of the third end plate inner diameter portion 3071 coincides with the axis of the rotating shaft 104.
  • the rotating shaft 104 is fastened to the third end plate inner diameter portion 3071.
  • the third end plate rivet insertion hole 3073 is a through hole into which the rivet 26 is inserted.
  • the third end plate rivet insertion hole 3073 has a circular shape in plan view.
  • a plurality of third end plate rivet insertion holes 3073 are arranged along the outer periphery of the third end plate inner diameter portion 3071 at intervals in the circumferential direction. The position of the third end plate rivet insertion hole 3073 matches the position of the first rivet insertion hole 3013 (see FIG. 4).
  • the third end plate inner diameter portion 3071 has a distance radially outward from the axis of the rotating shaft 104 such that the third end plate inner diameter portion 3071 ⁇ the third end plate rivet insertion hole 3073 ⁇ the third end plate outer diameter portion. 3075''.
  • the rotor 5C is arranged in the following order from the top: a fourth group 311, a third group 310, a second group 309, a first group 308, and a third non-magnetic end plate 307. ing.
  • the third non-magnetic end plate 307 may constitute the "second end plate part 402" with one piece, but a plurality of third non-magnetic end plates 307 may be stacked to form the "second end plate part 402". 402".
  • the fourth group 311, the third group 310, the second group 309, the first group 308, and the third non-magnetic end plate 307 have a third rivet insertion hole 3043, a second rivet insertion hole 3023, and a first end plate rivet insertion hole. It is fixed with a rivet 26 that is inserted in communication with the hole 3053, the second end plate rivet insertion hole 3063, the first rivet insertion hole 3013, and the third end plate rivet insertion hole 3073.
  • the "first end plate part 401" and the “second end plate part 402" made of a non-magnetic material are provided at both ends of the magnet 24 in the axial direction. '', no electromagnetic steel plate is placed near the magnet 24. Therefore, it is possible to suppress a decrease in FLUX (that is, a decrease in flow) due to leakage magnetic flux.
  • the fourth rotor core electromagnetic steel plate 304 of the fourth group 311 is fastened to the rotating shaft 104 by shrink fitting.
  • the third embodiment it is possible to improve the gripping force due to the shrink fit between the rotor 5C and the rotating shaft 104, and it is possible to suppress a decrease in the shrink fit stress.
  • Embodiment 3 as in Embodiment 1, the reduction in magnetic force due to the generation of leakage magnetic flux is suppressed, and the gripping force between rotor 5C and rotating shaft 104 is improved. be able to. As a result, reliability with respect to the load torque and dead weight of the hermetic compressor 130 during operation can be improved.
  • FIG. 13 is (a) a plan view seen from above, (b) a longitudinal sectional view, and (c) a plan view seen from below, showing the configuration of rotor 5D of electric motor 103 according to Embodiment 4.
  • FIG. 13(b) shows a cross-sectional view taken along line DD in FIG. 13(a).
  • the present invention is not limited thereto, and the second group 309 and the third group 310 may be provided on at least one of the "first end 308a" side and the "second end 308b" side of the first group 308. You can also do this.
  • a third group A non-magnetic end plate 307 is provided instead of the second group 309 and the third group 310 that were provided on the "second end 308b" side of the rotor 5B in the second embodiment.
  • Embodiment 4 The other configurations of Embodiment 4 are the same as Embodiment 2, so they are shown with the same reference numerals, and their explanation will be omitted here.
  • the rotor 5D of the fourth embodiment includes a third group 310, a second group 309, a first group 308, a third non-magnetic end plate 307, a magnet 24, and a rivet 26. It is equipped with The third non-magnetic end plate 307 is made of a non-magnetic material, as described in the third embodiment.
  • the third non-magnetic end plate 307 may constitute the "second end plate part 402" with one piece, but the "second end plate part 402" may be formed by laminating a plurality of third non-magnetic end plates 307. may be configured.
  • the first non-magnetic end plate 305 and the second non-magnetic end plate 306 of the second group 309 constitute the "second end plate part 402".
  • the third non-magnetic end plate 307 constitutes the "second end plate section 402.”
  • the rotor 5D is arranged in the following order from the top: a third group 310, a second group 309, a first group 308, and a third non-magnetic end plate 307.
  • the third group 310, the second group 309, the first group 308, and the third non-magnetic end plate 307 have a second rivet insertion hole 3023, a first end plate rivet insertion hole 3053, or a second end plate rivet insertion hole 3063, It is fixed with a rivet 26 inserted into the first rivet insertion hole 3013 and the third end plate rivet insertion hole 3073 so as to communicate with each other.
  • the "first end plate part 401" and the “second end plate part 402" made of a non-magnetic material are provided at both ends of the magnet 24 in the axial direction.
  • ⁇ no electromagnetic steel plate is placed near the magnet 24, so it is possible to suppress a decrease in FLUX (that is, a decrease in flow) due to leakage magnetic flux.
  • the first rotor core electromagnetic steel sheet 301 of the first group 308, the third rotor core electromagnetic steel sheet 303 of the second group 309, and the second rotor core electromagnetic steel sheet 302 of the third group 310 It is fastened to the rotating shaft 104 by shrink fitting.
  • the first group 308, the second group 309, the third group 310, etc. are fixed by the rivets 26.
  • the first group 308, the second group 309, the third group 310, etc. may be fixed using not only the rivets 16 but also other fasteners such as bolts and nuts.
  • both the number of first rivet insertion holes 3013 and the number of second rivet insertion holes 3023 are six was described as an example. Not limited to cases.
  • the number of first rivet insertion holes 3013 and the number of second rivet insertion holes 3023 may both be an arbitrary number of 2 or more.
  • an example is given in which there are three first end plate rivet insertion holes 3053, second end plate rivet insertion holes 3063, and third rivet insertion holes 3043.
  • the first end plate rivet insertion hole 3053, the second end plate rivet insertion hole 3063, and the third rivet insertion hole 3043 may all have an arbitrary number of one or more. However, it is desirable that the two or more rivet insertion holes are arranged in correspondence with each other so as to be line-symmetrical in plan view.
  • the axis of symmetry may be any line as long as it is a straight line corresponding to the diameter of the first outer diameter portion 3015 of the first rotor core electromagnetic steel sheet 301.

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  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Un rotor de moteur électrique selon la présente invention comprend : une pluralité de premières plaques d'acier électromagnétique à noyau de fer de rotor annulaires stratifiées et agencées dans la direction axiale, chacune des plaques d'acier comportant une première section de diamètre interne fixée à un arbre rotatif, des premiers trous d'insertion de rivet disposés de façon à s'étendre dans la direction axiale de l'arbre rotatif et agencés de façon à être espacés à des intervalles dans la direction circonférentielle, et un trou d'insertion d'aimant disposé de façon à s'étendre dans la direction axiale ; une pluralité de deuxièmes plaques d'acier électromagnétique à noyau de fer de rotor annulaires stratifiées et agencées dans la direction axiale, chacune des plaques d'acier comportant un aimant inséré dans un trou d'insertion d'aimant, une deuxième section de diamètre interne fixée à l'arbre rotatif, et des deuxièmes trous d'insertion de rivet disposés de façon à s'étendre dans la direction axiale et agencés de façon à être espacés à des intervalles dans la direction circonférentielle ; une troisième plaque d'acier électromagnétique à noyau de fer de rotor annulaire disposée entre les premières plaques d'acier électromagnétique à noyau de fer de rotor et les deuxièmes plaques d'acier électromagnétique à noyau de fer de rotor dans la direction axiale, et comportant une troisième section de diamètre interne fixée à l'arbre rotatif, et une troisième section de diamètre externe positionnée plus radialement vers l'intérieur que les premiers trous d'insertion de rivet ; une première partie de plaque d'extrémité disposée au niveau de la circonférence externe de la troisième section de diamètre externe, constituée d'un matériau non magnétique, disposée au niveau d'une extrémité axiale du trou d'insertion d'aimant, présentant une forme annulaire, et comportant des premiers trous d'insertion de rivet de plaque d'extrémité disposés de façon à s'étendre dans la direction axiale et agencés de façon à être espacés à des intervalles dans la direction circonférentielle d'une partie semi-annulaire de la forme annulaire, et des deuxièmes trous d'insertion de rivet de plaque d'extrémité agencés de façon à correspondre aux premiers trous d'insertion de rivet de plaque d'extrémité et à être espacés à des intervalles dans la direction circonférentielle de la partie semi-annulaire restante de la forme annulaire, et disposés de façon à s'étendre dans la direction axiale ; une deuxième partie de plaque d'extrémité constituée d'un matériau non magnétique, disposée à l'autre extrémité axiale du trou d'insertion d'aimant, présentant une forme annulaire, et comportant des trous d'insertion de rivet de plaque d'extrémité disposés de façon à s'étendre dans la direction axiale et agencés de façon à être espacés à des intervalles dans la direction circonférentielle ; et une pluralité de rivets insérés en communication avec les premiers trous d'insertion de rivet, les deuxièmes trous d'insertion de rivet, les premiers trous d'insertion de rivet de plaque d'extrémité ou les deuxièmes trous d'insertion de rivet de plaque d'extrémité, et les trous d'insertion de rivet de plaque d'extrémité. Une première section de diamètre externe formant la circonférence externe des premières plaques d'acier électromagnétique à noyau de fer de rotor est positionnée plus radialement vers l'extérieur qu'une deuxième section de diamètre externe formant la circonférence externe des deuxièmes plaques d'acier électromagnétique à noyau de fer de rotor, et la deuxième section de diamètre externe est positionnée plus radialement vers l'intérieur que les trous d'insertion d'aimant et plus radialement vers l'extérieur que les premiers trous d'insertion de rivet.
PCT/JP2022/018375 2022-04-21 2022-04-21 Rotor de moteur électrique, moteur électrique, compresseur et dispositif à cycle de réfrigération WO2023203709A1 (fr)

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JP2024515994A JPWO2023203709A1 (fr) 2022-04-21 2022-04-21

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005269695A (ja) * 2004-03-16 2005-09-29 Matsushita Electric Ind Co Ltd 密閉型電動圧縮機
JP2014128115A (ja) * 2012-12-26 2014-07-07 Toyota Industries Corp 永久磁石埋設型回転電機
WO2016203563A1 (fr) * 2015-06-17 2016-12-22 三菱電機株式会社 Moteur électrique de type à aimant permanent incorporé pour compresseur, compresseur, et dispositif à cycle de réfrigération

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005269695A (ja) * 2004-03-16 2005-09-29 Matsushita Electric Ind Co Ltd 密閉型電動圧縮機
JP2014128115A (ja) * 2012-12-26 2014-07-07 Toyota Industries Corp 永久磁石埋設型回転電機
WO2016203563A1 (fr) * 2015-06-17 2016-12-22 三菱電機株式会社 Moteur électrique de type à aimant permanent incorporé pour compresseur, compresseur, et dispositif à cycle de réfrigération

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