WO2016063576A1 - Compresseur et son procédé de fabrication - Google Patents

Compresseur et son procédé de fabrication Download PDF

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Publication number
WO2016063576A1
WO2016063576A1 PCT/JP2015/068171 JP2015068171W WO2016063576A1 WO 2016063576 A1 WO2016063576 A1 WO 2016063576A1 JP 2015068171 W JP2015068171 W JP 2015068171W WO 2016063576 A1 WO2016063576 A1 WO 2016063576A1
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WO
WIPO (PCT)
Prior art keywords
stator
peripheral surface
sealed container
container
electric motor
Prior art date
Application number
PCT/JP2015/068171
Other languages
English (en)
Japanese (ja)
Inventor
佐々木　亮
聡経 新井
谷　真男
尚久 五前
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 JP2016555100A priority Critical patent/JP6227160B2/ja
Priority to KR1020177003643A priority patent/KR101892405B1/ko
Priority to CN201520816085.0U priority patent/CN205105013U/zh
Priority to CN201510684611.7A priority patent/CN105553137B/zh
Publication of WO2016063576A1 publication Critical patent/WO2016063576A1/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
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/14—Provisions for readily assembling or disassembling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0085—Prime movers
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/70—Use of multiplicity of similar components; Modular construction

Definitions

  • the present invention relates to a compressor and a compressor manufacturing method.
  • the present invention relates to a hermetic electric compressor used in a refrigeration cycle apparatus such as an air conditioner or a refrigerator.
  • the stator formed by laminating electromagnetic steel sheets has low rigidity and the inner diameter roundness of the stator deteriorates, resulting in nonuniform air gaps between the stator and the rotor, resulting in magnetic imbalance. A sound is caused.
  • stress concentrates on specific parts of the stator core due to variations in the temperature distribution when heating the sealed container and the release of processing strain caused by the heating of parts, stress concentrates on specific parts of the stator core, causing iron loss, leading to a reduction in motor efficiency. It is burned.
  • An object of the present invention is to suppress, for example, a reduction in motor efficiency of a compressor.
  • a compressor includes: An electric motor having a stator, wherein two concave portions arranged along the circumferential direction are formed at a plurality of locations in a circumferential direction of the outer peripheral surface of the stator, and a notch is formed between the two concave portions; , Two convex portions arranged along the circumferential direction are formed at a plurality of locations in the circumferential direction of the inner peripheral surface, and the two convex portions enter the two concave portions to form the notches of the stator.
  • the two protrusions formed in the compressor container enter two recesses formed in the stator of the compressor motor, and a notch is formed between the two recesses.
  • the stator of the electric motor is fixed inside the container.
  • the notch reduces stress concentration that causes loss.
  • a protrusion that protrudes outward in the radial direction from the other region of the outer peripheral surface of the stator is formed in a region between the notch of the outer peripheral surface of the stator and each of the two recesses.
  • the projecting portion is in contact with the inner peripheral surface of the container, whereby the inner diameter roundness of the stator is improved. Therefore, according to the present invention, it is possible to suppress a decrease in motor efficiency.
  • FIG. 1 is a circuit diagram of a refrigeration cycle apparatus according to Embodiment 1.
  • FIG. 1 is a circuit diagram of a refrigeration cycle apparatus according to Embodiment 1.
  • FIG. 1 is a longitudinal sectional view of a compressor according to Embodiment 1.
  • FIG. 3 is a perspective view of a stator core of the stator of the electric motor according to Embodiment 1.
  • FIG. 4 is a plan view of a stator core of the stator of the electric motor according to Embodiment 1.
  • FIG. 3 is a partial perspective view of the sealed container according to the first embodiment.
  • FIG. 3 is a cross-sectional view of the sealed container according to Embodiment 1.
  • FIG. 1 is a circuit diagram of a refrigeration cycle apparatus according to Embodiment 1.
  • FIG. 1 is a longitudinal sectional view of a compressor according to Embodiment 1.
  • FIG. 3 is a perspective view of
  • FIG. 3 is a plan view of a split core of the stator of the electric motor according to Embodiment 1.
  • FIG. 3 is a partial cross-sectional view of the stator and the airtight container of the electric motor according to Embodiment 1.
  • FIG. 3 is a partial cross-sectional view of the stator and the airtight container of the electric motor according to Embodiment 1.
  • FIG. 3 is a partial cross-sectional view of the stator and the airtight container of the electric motor according to Embodiment 1.
  • FIG. 1 and 2 are circuit diagrams of a refrigeration cycle apparatus 10 according to the present embodiment.
  • FIG. 1 shows the refrigerant circuit 11a during the cooling operation.
  • FIG. 2 shows the refrigerant circuit 11b during heating operation.
  • the refrigeration cycle apparatus 10 is an air conditioner.
  • this Embodiment is applicable even if the refrigerating cycle apparatus 10 is apparatuses other than an air conditioner, such as a refrigerator and a heat pump cycle apparatus.
  • the refrigeration cycle apparatus 10 includes refrigerant circuits 11a and 11b in which a refrigerant circulates.
  • a compressor 12, a four-way valve 13, an outdoor heat exchanger 14, an expansion valve 15, and an indoor heat exchanger 16 are connected to the refrigerant circuits 11a and 11b.
  • the compressor 12 compresses the refrigerant.
  • the four-way valve 13 switches the direction in which the refrigerant flows between the cooling operation and the heating operation.
  • the outdoor heat exchanger 14 is an example of a first heat exchanger.
  • the outdoor heat exchanger 14 operates as a condenser during the cooling operation, and dissipates the refrigerant compressed by the compressor 12.
  • the outdoor heat exchanger 14 operates as an evaporator during heating operation, and heats the refrigerant by exchanging heat between the outdoor air and the refrigerant expanded by the expansion valve 15.
  • the expansion valve 15 is an example of an expansion mechanism.
  • the expansion valve 15 expands the refrigerant radiated by the condenser.
  • the indoor heat exchanger 16 is an example of a second heat exchanger.
  • the indoor heat exchanger 16 operates as a condenser during the heating operation, and dissipates the refrigerant compressed by the compressor 12.
  • the indoor heat exchanger 16 operates as an evaporator during the cooling operation, and heats the refrigerant by exchanging heat between the indoor air and the refrigerant expanded by the expansion valve 15.
  • the refrigeration cycle apparatus 10 further includes a control device 17.
  • the control device 17 is, for example, a microcomputer. 1 and 2 show only the connection between the control device 17 and the compressor 12, the control device 17 is connected not only to the compressor 12 but also to each element connected to the refrigerant circuits 11a and 11b. .
  • the control device 17 monitors and controls the state of each element.
  • any refrigerant such as R407C refrigerant, R410A refrigerant, R1234yf refrigerant, or the like can be used.
  • FIG. 3 is a longitudinal sectional view of the compressor 12. 4 is a cross-sectional view taken along the line AA in FIG. In FIGS. 3 and 4, hatching representing a cross section is omitted. In FIG. 4, only the inside of the sealed container 20 is shown.
  • the compressor 12 is a one-cylinder rotary compressor. Note that the present embodiment can be applied even when the compressor 12 is a multi-cylinder rotary compressor or a scroll compressor.
  • the compressor 12 includes a sealed container 20, a compression mechanism 30, an electric motor 40, and a crankshaft 50.
  • the sealed container 20 is an example of a container.
  • a suction pipe 21 for sucking the refrigerant and a discharge pipe 22 for discharging the refrigerant are attached to the sealed container 20.
  • the compression mechanism 30 is housed inside the sealed container 20. Specifically, the compression mechanism 30 is installed in the lower part inside the sealed container 20. The compression mechanism 30 is driven by the electric motor 40. The compression mechanism 30 compresses the refrigerant sucked into the suction pipe 21.
  • the electric motor 40 is also housed inside the sealed container 20. Specifically, the electric motor 40 is installed inside the sealed container 20 at a position where the refrigerant compressed by the compression mechanism 30 passes before being discharged from the discharge pipe 22. That is, the electric motor 40 is installed above the compression mechanism 30 inside the sealed container 20.
  • the electric motor 40 is a concentrated winding motor. The present embodiment can be applied even if the electric motor 40 is a distributed winding motor.
  • Refrigerator oil 25 for lubricating the sliding portions of the compression mechanism 30 is stored at the bottom of the sealed container 20.
  • the refrigerating machine oil 25 is pumped up by an oil pump provided at the lower portion of the crankshaft 50 and supplied to each sliding portion of the compression mechanism 30.
  • the refrigerating machine oil 25 for example, POE (polyol ester), PVE (polyvinyl ether), and AB (alkylbenzene) which are synthetic oils are used.
  • the compression mechanism 30 includes a cylinder 31, a rolling piston 32, a vane 36, a main bearing 33, and a sub bearing 34.
  • the outer periphery of the cylinder 31 is substantially circular in plan view.
  • a cylinder chamber 62 that is a substantially circular space in plan view is formed inside the cylinder 31.
  • the cylinder 31 is open at both axial ends.
  • the cylinder 31 is provided with a vane groove 61 connected to the cylinder chamber 62 and extending in the radial direction.
  • a back pressure chamber 63 which is a substantially circular space in plan view, connected to the vane groove 61 is formed outside the vane groove 61.
  • the cylinder 31 is provided with a suction port through which the gas refrigerant is sucked from the refrigerant circuits 11a and 11b.
  • the suction port passes through the cylinder chamber 62 from the outer peripheral surface of the cylinder 31.
  • the cylinder 31 is provided with a discharge port through which the refrigerant compressed from the cylinder chamber 62 is discharged.
  • the discharge port is formed by cutting out the upper end surface of the cylinder 31.
  • the rolling piston 32 has a ring shape.
  • the rolling piston 32 moves eccentrically in the cylinder chamber 62.
  • the rolling piston 32 is slidably fitted to the eccentric shaft portion 51 of the crankshaft 50.
  • the shape of the vane 36 is a flat, substantially rectangular parallelepiped.
  • the vane 36 is installed in the vane groove 61 of the cylinder 31.
  • the vane 36 is always pressed against the rolling piston 32 by a vane spring 37 provided in the back pressure chamber 63. Since the inside of the sealed container 20 is at a high pressure, when the operation of the compressor 12 starts, the difference between the pressure in the sealed container 20 and the pressure in the cylinder chamber 62 on the back surface of the vane that is the surface on the back pressure chamber 63 side of the vane 36. The force by acts.
  • the vane spring 37 is mainly used for the purpose of pressing the vane 36 against the rolling piston 32 at the time of starting the compressor 12 where there is no difference in the pressure in the sealed container 20 and the cylinder chamber 62.
  • the main bearing 33 has a substantially inverted T shape when viewed from the side.
  • the main bearing 33 is slidably fitted to a main shaft portion 52 that is a portion above the eccentric shaft portion 51 of the crankshaft 50.
  • the main bearing 33 closes the cylinder chamber 62 and the vane groove 61 of the cylinder 31.
  • the auxiliary bearing 34 is substantially T-shaped when viewed from the side.
  • the auxiliary bearing 34 is slidably fitted to the auxiliary shaft portion 53 that is a portion below the eccentric shaft portion 51 of the crankshaft 50.
  • the auxiliary bearing 34 closes the cylinder chamber 62 and the lower side of the vane groove 61 of the cylinder 31.
  • the main bearing 33 includes a discharge valve.
  • a discharge muffler 35 is attached to the outside of the main bearing 33.
  • the high-temperature and high-pressure gas refrigerant discharged through the discharge valve once enters the discharge muffler 35 and is then discharged from the discharge muffler 35 into the space in the sealed container 20.
  • the discharge valve and the discharge muffler 35 may be provided in the auxiliary bearing 34 or in both the main bearing 33 and the auxiliary bearing 34.
  • the material of the cylinder 31, the main bearing 33, and the auxiliary bearing 34 is gray cast iron, sintered steel, carbon steel, or the like.
  • the material of the rolling piston 32 is, for example, alloy steel containing chromium or the like.
  • the material of the vane 36 is, for example, high speed tool steel.
  • a suction muffler 23 is provided beside the sealed container 20.
  • the suction muffler 23 sucks low-pressure gas refrigerant from the refrigerant circuits 11a and 11b.
  • the suction muffler 23 prevents the liquid refrigerant from directly entering the cylinder chamber 62 of the cylinder 31 when the liquid refrigerant returns.
  • the suction muffler 23 is connected to the suction port of the cylinder 31 via the suction pipe 21.
  • the main body of the suction muffler 23 is fixed to the side surface of the sealed container 20 by welding or the like.
  • the electric motor 40 is a brushless DC (Direct Current) motor. Note that the present embodiment can be applied even if the motor 40 is a motor other than a brushless DC motor, such as an induction motor.
  • a brushless DC motor such as an induction motor.
  • the electric motor 40 includes a substantially cylindrical stator 41 and a substantially columnar rotor 42.
  • the stator 41 is fixed in contact with the inner peripheral surface of the sealed container 20.
  • the rotor 42 is installed inside the stator 41 with a gap of about 0.3 to 1 mm.
  • the stator 41 includes a stator core 43 and a winding 44.
  • the stator core 43 is formed by punching a plurality of electromagnetic steel sheets having a thickness of 0.1 to 1.5 mm, each having a thickness of 0.1 to 1.5 mm, laminated in the axial direction, and fixed by caulking or welding. Produced.
  • the winding 44 is wound around the stator core 43 in a concentrated manner through an insulating member 47.
  • the winding 44 is composed of a core wire and at least one layer of a coating covering the core wire.
  • the material of the core wire is, for example, copper.
  • the material of the film is, for example, AI (amidoimide) / EI (ester imide).
  • the material of the insulating member 47 is, for example, PET (polyethylene terephthalate), PBT (polybutylene terephthalate), FEP (tetrafluoroethylene / hexafluoropropylene copolymer), PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer).
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • FEP tetrafluoroethylene / hexafluoropropylene copolymer
  • PFA tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer
  • PTFE polytetrafluoroethylene
  • LCP liquid crystal polymer
  • PPS polyphenylene sulfide
  • a lead wire 45 is connected to the winding 44.
  • the rotor 42 includes a rotor core 46 and a permanent magnet (not shown).
  • the rotor core 46 is formed by punching a plurality of electromagnetic steel sheets having a thickness of 0.1 to 1.5 mm, having iron as a main component, and laminating them in an axial direction. It is manufactured by fixing by caulking or welding.
  • the permanent magnet is inserted into a plurality of insertion holes formed in the rotor core 46.
  • the permanent magnet forms a magnetic pole. For example, a ferrite magnet or a rare earth magnet is used as the permanent magnet.
  • an upper end plate 48 and a lower end plate 49 are provided at the upper end and lower end of the rotor, which are the axial ends of the rotor 42, respectively.
  • the upper end plate 48 and the lower end plate 49 also serve as a rotation balancer.
  • the upper end plate 48 and the lower end plate 49 are fixed to the rotor core 46 by a plurality of fixing rivets or the like not shown.
  • a shaft hole into which the main shaft portion 52 of the crankshaft 50 is shrink-fitted or press-fitted is formed at the center of the rotor core 46 in plan view.
  • a plurality of through holes penetrating substantially in the axial direction are formed around the shaft hole of the rotor core 46.
  • Each through hole serves as one of the passages of the gas refrigerant that is discharged from the discharge muffler 35 to the space in the sealed container 20.
  • the motor 40 when the motor 40 is configured as an induction motor, a plurality of slots formed in the rotor core 46 are filled or inserted with a conductor formed of aluminum, copper, or the like. Then, a squirrel-cage winding in which both ends of the conductor are short-circuited by end rings is formed.
  • a terminal 24 connected to an external power source such as an inverter device is attached to the top of the sealed container 20.
  • the terminal 24 is a glass terminal, for example.
  • the terminal 24 is fixed to the sealed container 20 by welding, for example.
  • a lead wire 45 from the electric motor 40 is connected to the terminal 24.
  • a discharge pipe 22 having both axial ends opened is attached at the top of the sealed container 20.
  • the gas refrigerant discharged from the compression mechanism 30 is discharged from the space in the sealed container 20 through the discharge pipe 22 to the external refrigerant circuits 11a and 11b.
  • a recess 72 is formed in the outer peripheral surface 71 of the stator 41 of the electric motor 40.
  • a convex portion 82 that enters the concave portion 72 is formed in order to fix the stator 41 of the electric motor 40 to the inside of the sealed container 20.
  • Electric power is supplied from the terminal 24 to the stator 41 of the electric motor 40 via the lead wire 45.
  • a current flows through the winding 44 of the stator 41 and a magnetic flux is generated from the winding 44.
  • the rotor 42 of the electric motor 40 rotates by the action of the magnetic flux generated from the winding 44 and the magnetic flux generated from the permanent magnet of the rotor 42.
  • the crankshaft 50 fixed to the rotor 42 rotates.
  • the rolling piston 32 of the compression mechanism 30 rotates eccentrically in the cylinder chamber 62 of the cylinder 31 of the compression mechanism 30.
  • a space between the cylinder 31 and the rolling piston 32 is divided into two by a vane 36 of the compression mechanism 30.
  • the volumes of these two spaces change.
  • the volume gradually increases, whereby low-pressure gas refrigerant is sucked from the suction muffler 23.
  • the volume of the gas refrigerant is gradually reduced to compress the gas refrigerant therein.
  • the compressed, high-pressure and high-temperature gas refrigerant is discharged from the discharge muffler 35 into the space in the sealed container 20.
  • the discharged gas refrigerant further passes through the electric motor 40 and is discharged out of the sealed container 20 from the discharge pipe 22 at the top of the sealed container 20.
  • the refrigerant discharged to the outside of the sealed container 20 returns to the suction muffler 23 again through the refrigerant circuits 11a and 11b.
  • the vane 36 is provided integrally with the rolling piston 32.
  • the crankshaft 50 is driven, the vane 36 moves in and out along the receiving groove of the support body that is rotatably attached to the rolling piston 32.
  • the vane 36 moves in the radial direction while swinging according to the rotation of the rolling piston 32, thereby dividing the inside of the cylinder chamber 62 into a compression chamber and a suction chamber.
  • the support is composed of two columnar members having a semicircular cross section.
  • the support body is rotatably fitted in a circular holding hole formed in an intermediate portion between the suction port and the discharge port of the cylinder 31.
  • FIG. 5 is a perspective view of the stator core 43 of the stator 41 of the electric motor 40.
  • FIG. 6 is a plan view of the stator core 43 of the stator 41 of the electric motor 40.
  • two concave portions 72 arranged along the circumferential direction are formed at a plurality of locations in the circumferential direction of the outer peripheral surface 71 of the stator core 43.
  • a notch 73 is formed between the two recesses 72.
  • the outer peripheral surface 71 of the stator core 43 corresponds to the outer peripheral surface of the stator 41 of the electric motor 40.
  • Each recess 72 extends in a groove shape along the axial direction.
  • Each notch 73 becomes one of the passages of the gas refrigerant discharged from the discharge muffler 35 to the space in the sealed container 20.
  • Each notch 73 also serves as a passage for the refrigerating machine oil 25 returning from the top of the electric motor 40 to the bottom of the sealed container 20.
  • the stator core 43 is configured by connecting a plurality of divided cores 74 in the circumferential direction. That is, in the present embodiment, the stator 41 of the electric motor 40 has a plurality of divided iron cores 74 that are connected in the circumferential direction and constitute the stator iron core 43.
  • a tooth 75 is formed on each divided iron core 74.
  • the teeth 75 have a shape that extends inward in the radial direction with a certain width from the root, and has a shape in which the width is widened at the tip.
  • a winding 44 is wound around a portion of the tooth 75 extending at a certain width. When a current is passed through the winding 44, the teeth 75 around which the winding 44 is wound become a magnetic pole. The direction of the magnetic pole is determined by the direction of the current flowing through the winding 44.
  • FIG. 5 and 6 show, as an example, the stator core 43 in which two concave portions 72 and notches 73 are formed at nine locations in the circumferential direction of the outer peripheral surface 71.
  • the number of locations where the notches 73 are formed can be changed as appropriate.
  • two concave portions 72 and notches 73 are formed at three or more locations in the circumferential direction of the outer peripheral surface 71.
  • stator core 43 in which nine teeth 75 are formed is shown, but the number of teeth 75 can be changed as appropriate.
  • stator core 43 composed of a plurality of divided cores 74
  • an integral stator core 43 may be used.
  • each concave portion 72 extends in a groove shape over the entire axial direction
  • the configuration in which each concave portion 72 extends only in a part in the axial direction that is, each concave portion 72 has You may employ
  • the recess 72 is provided as a pair of two adjacent states.
  • a partial region of the outer peripheral surface 71 of the stator core 43 which is a combination of the two concave portions 72 and the portion sandwiched between the two concave portions 72, is referred to as a fixed portion 76.
  • nine fixing portions 76 are provided on the outer peripheral surface 71 of the stator core 43 at substantially equal intervals. Therefore, there are 18 recesses 72 in total. Of the 18 pieces, 6 pieces are used to fix the stator 41 of the electric motor 40 inside the sealed container 20.
  • FIG. 7 is a partial perspective view of the sealed container 20.
  • FIG. 8 is a cross-sectional view of the sealed container 20.
  • FIG. 7 shows only a part of the sealed container 20 in the axial direction.
  • the axial direction of the sealed container 20 is the height direction of the sealed container 20.
  • the axial direction of the sealed container 20 is parallel to the axial direction of the stator 41 of the electric motor 40.
  • two convex portions 82 arranged in the circumferential direction are formed at a plurality of locations in the circumferential direction of the inner circumferential surface 81 of the sealed container 20.
  • the two convex portions 82 enter the two concave portions 72 shown in FIGS. 5 and 6 and sandwich the portion where the notch 73 of the stator 41 of the electric motor 40 is formed, so that the electric motor 40 is placed inside the sealed container 20.
  • the stator 41 is fixed.
  • FIG. 7 and 8 show the sealed container 20 in which two convex portions 82 are formed at three locations in the circumferential direction of the inner peripheral surface 81 as an example. Can be appropriately changed. In order to securely fix the stator 41 of the electric motor 40 to the inside of the sealed container 20, it is desirable that two convex portions 82 are formed at three or more locations in the circumferential direction of the inner peripheral surface 81.
  • the convex portion 82 is provided as a pair of two adjacent states. As will be described later, the convex portion 82 is used to seal the stator 41 of the electric motor 40 with an airtight container. It is formed by pushing the outer peripheral surface 83 of the sealed container 20 into the sealed container 20 in a state of being installed inside the sealed container 20. The two convex portions 82 forming the set enter the two concave portions 72 forming the set to form two caulking points.
  • combined the two convex parts 82 which form these caulking points shall be called the caulking part 85.
  • FIG. 9 is a plan view of the split iron core 74 of the stator 41 of the electric motor 40.
  • the two convex portions 82 enter the two concave portions 72 at a plurality of locations corresponding to each other of the stator 41 and the sealed container 20 of the electric motor 40, so that the stator 41 of the electric motor 40 is cut.
  • the stator 41 of the electric motor 40 is fixed inside the sealed container 20 by sandwiching the portion where the notch 73 is formed.
  • the portion between the two concave portions 72 is tightened by the two convex portions 82, so that the portion B shown in FIG. 9, that is, the radially inner end portion of the seam of the split iron core 74 is formed. Stress is concentrated.
  • Hysteresis loss means that the magnetic resistance at a location where stress is concentrated increases, so that the magnetic flux hardly flows at that location and loss occurs. Hysteresis loss is so-called iron loss, which causes a reduction in motor efficiency.
  • the notch 73 is provided between the two recesses 72, stress can be concentrated at the position C shown in FIG. . Since the location C is away from the flow path of the magnetic flux from the magnetic pole, hysteresis loss is unlikely to occur even if stress concentrates on this location. Moreover, if stress concentrates on the location C, the stress applied on the location B can be significantly reduced. Therefore, generation
  • the split iron core 74 is formed in a region between the notch 73 of the outer peripheral surface 71 of the split iron core 74 constituting the stator core 43 and each of the two recesses 72.
  • a protruding portion 77 that protrudes outward in the radial direction from the other region of the outer peripheral surface 71 is formed.
  • the projecting portion 77 is in contact with the inner peripheral surface 81 of the sealed container 20.
  • the degree is improved.
  • the two convex portions 82 formed on the sealed container 20 sandwich the portion where the notch 73 of the stator 41 is formed, so that the tightening acting on the stator 41 from the sealed container 20 is performed. Even if the force is low, the stator 41 can be fixed inside the sealed container 20.
  • the inner peripheral surface 81 of the hermetic container 20 and the outer peripheral surface 71 of the stator 41 are brought into contact with each other, and the contact area is reduced, so that the stator 41 is reliably fixed and the inner diameter roundness of the stator 41 is increased. It is possible to achieve both improvement.
  • the contact area can be reduced.
  • the region between the notch 73 of the outer peripheral surface 71 of the split iron core 74 constituting the stator core 43 and each of the two recesses 72 is connected to the notch 73 and the protrusion 77 is not formed. It is divided into a contact area 78 and a contact area 79 connected to one of the two recesses 72 and formed with a protrusion 77.
  • the positional relationship between the non-contact region 78 and the contact region 79 may be reversed. However, when the non-contact region 78 is on the concave portion 72 side, the convex portion 82 does not enter the concave portion 72 to the root.
  • the contact region 79 on the concave portion 72 side it is desirable to provide the contact region 79 on the concave portion 72 side.
  • the area ratio between the non-contact region 78 and the contact region 79 can be arbitrarily set, but it is desirable that the area of the contact region 79 is smaller than the area of the non-contact region 78. That is, it is desirable that the ratio of the contact region 79 in the region between the notch 73 on the outer peripheral surface 71 of each divided core 74 and each of the two recesses 72 is lower than 50%.
  • the proportion of the contact area 79 in the entire outer peripheral surface 71 of the stator 41 is desirably 30% or less.
  • the ratio of the contact region 79 to the entire outer peripheral surface 71 of the stator 41 is more preferably 1% or more.
  • the ratio of the contact region 79 in the entire outer peripheral surface 71 of the stator 41 is 3 to 15%.
  • the “area” corresponding to the “occupied ratio” is also N times. It is supposed to be. “Angle” may be considered to be the length in the circumferential direction.
  • the length that one protrusion 77 protrudes from the outer peripheral surface 71 of the stator 41 may be an arbitrary length.
  • the length that one protrusion 77 protrudes from the outer peripheral surface 71 of the stator 41 is that the contact region 79 adjacent to the non-contact region 78 is in the radial direction of the stator core 43 with respect to one non-contact region 78. It is the length which protrudes, and is the dimension shown by P in FIG.
  • the stator 41 of the electric motor 40 is fitted inside the sealed container 20 by shrink fitting so that the inner peripheral surface 81 of the sealed container 20 contacts the protruding portion 77.
  • the air gap between the stator 41 and the rotor 42 is reduced due to the deterioration of the roundness of the inner diameter of the stator core 43. May become non-uniform and a magnetic unbalanced sound may be caused.
  • the two convex portions 82 enter the two concave portions 72 and the notches 73 of the stator 41 of the electric motor 40 are formed at a plurality of locations corresponding to each other of the stator 41 and the sealed container 20 of the electric motor 40. Since the formed portion is sandwiched, the degree of fixing by shrink fitting can be reduced. That is, on the outer peripheral surface 71 of the stator core 43, the tightening portion by shrink fitting can be held only in the contact region 79.
  • stator 41 of the electric motor 40 may be fitted inside the sealed container 20 by cold fitting.
  • the two concave portions 72 are arranged separately on both sides of the center position in the circumferential direction of each of the plurality of divided iron cores 74.
  • a center line indicating the center position of the divided iron core 74 in the circumferential direction is represented by a one-dot chain line D.
  • Storage step The compression mechanism 30 is stored in the closed container 20.
  • Installation process a process of installing the stator 41 of the electric motor 40 inside the sealed container 20.
  • Processing step a step of heating a plurality of locations in the circumferential direction of the inner peripheral surface 81 of the sealed container 20 and processing the heated plurality of locations to form two convex portions 82 that enter the two concave portions 72.
  • Fixing step The two convex portions 82 are thermally contracted, and the portions where the notches 73 of the stator 41 of the electric motor 40 are formed by the two convex portions 82 are sandwiched between the stator 41 of the electric motor 40 and the sealed container. 20 is a step of fixing the inside.
  • the above four steps are performed in the order of the storing step, the setting step, the processing step, and the fixing step.
  • 10, 11, and 12 are partial cross-sectional views of the stator 41 and the sealed container 20 of the motor 40 in each process for fixing the stator 41 of the motor 40 to the inside of the sealed container 20.
  • a certain range centered on a position corresponding to the center position between the two concave portions 72 of each fixing portion 76 on the outer peripheral surface 83 of the sealed container 20 is the sealed container 20.
  • fixed part 76 in is heated locally from the outer side of the airtight container 20.
  • FIG. 11 After the sealed container 20 is thermally expanded by heating, as shown in FIG. 11, the pressing jig 91 is pressed straight from the outside of the sealed container 20 toward the two concave portions 72.
  • the two tip portions 92 of the pressing jig 91 having a width slightly smaller than the width of the concave portion 72 and having an end surface that is a rectangular flat surface are pressed toward the two concave portions 72 simultaneously.
  • a processed hole 84 having the same width as the distal end portion 92 of the pressing jig 91 is formed in the outer peripheral surface 83 of the sealed container 20.
  • Two convex portions 82 that enter the two concave portions 72 are formed on the inner peripheral surface 81 of the sealed container 20. That is, a caulking portion 85 having two caulking points is formed.
  • One pressing jig 91 is used for each of the three fixing portions 76.
  • three pressing jigs 91 are used to form three caulking portions 85.
  • the three caulking portions 85 are formed by pressing the three pressing jigs 91 almost simultaneously onto the three locations on the outer peripheral surface 71 of the stator core 43.
  • the thermally expanded sealed container 20 is cooled as shown in FIG.
  • the two convex portions 82 are drawn toward the center of the heated range by heat shrinkage. Therefore, the two concave portions 72 adjacent to the fixing portion 76 are tightened in the circumferential direction by the two convex portions 82.
  • the stator 41 of the electric motor 40 including the stator core 43 is fixed to the sealed container 20.
  • the stator 41 of the electric motor 40 is not fixed by the radial force as in the conventional fixing method by shrink fitting, but the stator 41 of the electric motor 40 is fixed by the circumferential force. The strain applied to the iron core 43 can be reduced.
  • FIG. 13 is an E arrow view of FIG. That is, FIG. 13 is a view of the outer peripheral surface 83 of the sealed container 20 as viewed from the direction E shown in FIG.
  • the sealed container 20 is locally heated, and the sealed container 20 is softened by the influence of heat in a circular heating range 93, for example.
  • a circular heating range 93 for example.
  • two adjacent processing holes 84 are formed on the outer peripheral surface 83 of the sealed container 20.
  • Two convex portions 82 are formed at corresponding positions on the inner peripheral surface 81 of the sealed container 20.
  • the fixing step the sealed container 20 is cooled, and the two convex portions 82 are drawn toward the heating center 94.
  • the two convex portions 82 formed in the sealed container 20 of the compressor 12 enter the two concave portions 72 formed in the stator 41 of the electric motor 40 of the compressor 12, and these two concave portions
  • the stator 41 of the electric motor 40 is fixed to the inside of the sealed container 20 by sandwiching the portion in which the notch 73 between 72 is formed.
  • the presence of the notch 73 relieves stress concentration that causes loss.
  • a protruding portion 77 that protrudes outward in the radial direction from the other region of the outer peripheral surface 71 of the stator 41 in a region between the notch 73 of the outer peripheral surface 71 of the stator 41 and each of the two concave portions 72. Is formed.
  • the protrusion 77 is in contact with the inner peripheral surface 81 of the sealed container 20, so that the inner diameter roundness of the stator 41 is increased. improves. Therefore, according to the present embodiment, it is possible to suppress a decrease in motor efficiency.
  • the present embodiment it is possible to obtain a hermetic electric compressor with high motor efficiency and low noise by minimizing the occurrence of iron loss and the deterioration of the roundness of the inner diameter of the stator 41 of the electric motor 40. it can. Even for long-term use, there is high reliability that does not cause problems such as noise and vibration increase due to rattling of the stator 41 of the electric motor 40, and iron loss due to stress concentration of the stator 41 is reduced.
  • a hermetic electric compressor having excellent efficiency can be provided.
  • a sufficient pinching force is generated between the two concave portions 72 of the stator 41 of the electric motor 40 by the two convex portions 82 adjacent to the closed container 20, so that the electric motor is supplied to the closed container 20.
  • Forty stators 41 can be firmly fixed. Even with long-term use of a hermetic electric compressor, it can withstand normal and excessive force generated during operation and does not cause problems such as increased noise and vibration due to rattling of the stator 41 of the electric motor 40. A highly reliable compressor 12 can be obtained. Moreover, since the force received by the stator 41 of the electric motor 40 can be reduced and the occurrence of iron loss due to stress concentration can be suppressed, the performance is improved.
  • the material of the sealed container 20 is generally iron.
  • the yield point of iron suddenly decreases from around 600 ° C.
  • the temperature at which the yield point starts to drop abruptly in this way is referred to herein as the softening temperature.
  • the temperature during heating should be higher than the temperature at which the material softens and lower than the melting point.
  • the pushing amount is a depth at which the convex portion 82 enters the concave portion 72, and is a dimension indicated by H in FIG.
  • the material of the sealed container 20 is iron, and the softening temperature is 600 ° C.
  • the melting point of iron is about 1560 ° C. Therefore, the heating temperature for local heating is preferably 600 ° C. or higher and 1500 ° C. or lower.
  • the heating temperature changes, and it is desirable that the temperature be higher than the softening temperature of the material and lower than the melting point.
  • the convex portion 82 can be reliably formed by using the characteristics of the material of the sealed container 20 at the high temperature as described above. Can do. Moreover, the pushing force for forming the convex portion 82 is reduced, and the distortion generated in the stator core 43 when the compressor 12 is assembled can be reduced. Furthermore, by setting the heating center 94 of the sealed container 20 so as to overlap the centers of the two recesses 72, after the two convex portions 82 are reliably formed in the sealed container 20, the heat shrinks toward the heating center 94. The two concave portions 72 can be firmly sandwiched between the two convex portions 82.
  • the convex part 82 of the airtight container 20 is reliably formed, and the convex part 82 of the airtight container 20 is firmly sandwiched between the concave parts 72 of the stator 41 of the electric motor 40 to fix the stator 41 of the electric motor 40.
  • the stator 41 of the strong electric motor 40 that can withstand normal and excessive force generated during the operation of the compressor 12 and that does not generate rattling can be fixed for long-term use of the compressor 12. Is possible.
  • the stator 41 of the electric motor 40 is supported by sandwiching the convex portion 82 of the hermetic container 20, and for the tangential direction, the stator 41 of the electric motor 40 is convex of the hermetic container 20. Not only support by sandwiching the portion 82 but also the rigidity of the convex portion 82 of the sealed container 20 is supported. What is necessary is just to select a fixed shape so that required fixed strength can be obtained according to the acceleration which generate
  • the fixing strength can be increased by increasing the cross-sectional area of the convex portion 82 or increasing the number of the fixing portions 76.
  • stator core 43 since a plurality of groove-shaped recesses 72 are formed at a plurality of locations of the stator core 43, the stator core 43 can be formed by stacking the same type of electrical steel sheets. Since there is no need to prepare a mold, it is possible to reduce costs and reduce the risk of assembly errors.
  • stator 41 and the sealed container 20 are shrink-fitted in the above-described installation process, after the stator 41 and the sealed container 20 are shrink-fitted in the above-described installation process, the processing process and the fixing process are performed.
  • shrink fitting is not essential.
  • the stator 41 may be shrink-fitted into the sealed container 20 with such a strength that no minute rattle is generated between the stator 41 and the convex portion 82 of the sealed container 20 when thermally contracted. Therefore, the contact area by shrink fitting of the stator 41 and the airtight container 20 can be significantly reduced compared with the case where it fixes only by the conventional shrink fitting. Therefore, the stress acting on the stator 41 can be reduced, and the performance of the compressor 12 can be improved.
  • the stator core 43 is formed by joining a plurality of T-shaped split cores 74 in a ring shape.
  • a recess 72 formed in the outer peripheral surface 71 of the stator core 43 is provided in each divided core 74. If two adjacent recesses 72 are formed across the two split cores 74, the force acting during the thermal contraction of the corresponding two projections 82 acts to press the two split cores 74 against each other. Therefore, there is a possibility that the inner diameter roundness of the stator core 43 is deteriorated.
  • the concave portion 72 of the stator 41 may be provided as, for example, a rectangular pilot hole instead of being provided in a groove shape. Even in that case, the stator 41 can be similarly fixed to the sealed container 20.
  • the rectangular pilot hole of the stator 41 can be formed by laminating two types of electromagnetic steel plates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacturing & Machinery (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

Selon l'invention, le stator d'un moteur électrique destiné à un compresseur comporte deux évidements (72) qui sont pratiqués à des emplacements circonférentiels sur la surface périphérique externe (71) du stator de manière à se trouver côte à côte sur le plan circonférentiel, et une découpe (73) est située entre les deux évidements (72). Le contenant fermé du compresseur présente deux saillies qui sont formées à des emplacements circonférentiels sur sa surface périphérique interne de manière à être placées côte à côte sur le plan circonférentiel. Les deux saillies entrent dans les deux évidements (72) pour saisir une partie du stator du moteur électrique, cette partie incluant la découpe (73). Ainsi, le stator du moteur électrique est fixé au côté interne du contenant fermé.
PCT/JP2015/068171 2014-10-22 2015-06-24 Compresseur et son procédé de fabrication WO2016063576A1 (fr)

Priority Applications (4)

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JP2016555100A JP6227160B2 (ja) 2014-10-22 2015-06-24 圧縮機及び圧縮機製造方法
KR1020177003643A KR101892405B1 (ko) 2014-10-22 2015-06-24 압축기 및 압축기 제조 방법
CN201520816085.0U CN205105013U (zh) 2014-10-22 2015-10-20 压缩机
CN201510684611.7A CN105553137B (zh) 2014-10-22 2015-10-20 压缩机以及压缩机制造方法

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KR (1) KR101892405B1 (fr)
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WO2020261468A1 (fr) * 2019-06-27 2020-12-30 三菱電機株式会社 Noyau de stator, stator, moteur et compresseur
WO2020261467A1 (fr) * 2019-06-27 2020-12-30 三菱電機株式会社 Noyau de stator, stator, moteur électrique, et compresseur
US20220173626A1 (en) * 2019-03-08 2022-06-02 Mitsubishi Heavy Industries Thermal Systems, Ltd. Electric compressor
WO2022234652A1 (fr) * 2021-05-07 2022-11-10 三菱電機株式会社 Compresseur rotatif

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WO2018088489A1 (fr) * 2016-11-14 2018-05-17 三菱電機株式会社 Armature de machine électrique tournante, machine électrique tournante, machine de levage d'ascenseur et procédé de fabrication d'armature
AU2017407862B2 (en) * 2017-03-27 2020-09-10 Mitsubishi Electric Corporation Rotor, Motor, Compressor, Fan, and Air Conditioning Apparatus
JPWO2020255243A1 (ja) * 2019-06-18 2021-11-25 三菱電機株式会社 圧縮機

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US20220173626A1 (en) * 2019-03-08 2022-06-02 Mitsubishi Heavy Industries Thermal Systems, Ltd. Electric compressor
WO2020261468A1 (fr) * 2019-06-27 2020-12-30 三菱電機株式会社 Noyau de stator, stator, moteur et compresseur
WO2020261467A1 (fr) * 2019-06-27 2020-12-30 三菱電機株式会社 Noyau de stator, stator, moteur électrique, et compresseur
JPWO2020261467A1 (ja) * 2019-06-27 2021-11-18 三菱電機株式会社 固定子鉄心、固定子、電動機、及び、圧縮機
JPWO2020261468A1 (ja) * 2019-06-27 2021-11-25 三菱電機株式会社 固定子鉄心、固定子、電動機、及び、圧縮機
JP7150175B2 (ja) 2019-06-27 2022-10-07 三菱電機株式会社 固定子鉄心、固定子、電動機、及び、圧縮機
JP7150174B2 (ja) 2019-06-27 2022-10-07 三菱電機株式会社 固定子鉄心、固定子、電動機、及び、圧縮機
WO2022234652A1 (fr) * 2021-05-07 2022-11-10 三菱電機株式会社 Compresseur rotatif

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JPWO2016063576A1 (ja) 2017-04-27
KR20170029582A (ko) 2017-03-15
JP6227160B2 (ja) 2017-11-08
CN105553137A (zh) 2016-05-04
CZ2017121A3 (cs) 2018-05-30
CN105553137B (zh) 2018-07-27
KR101892405B1 (ko) 2018-08-27

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