WO2022145185A1 - Procédé de fabrication d'un compresseur à spirale, et compresseur à spirale - Google Patents

Procédé de fabrication d'un compresseur à spirale, et compresseur à spirale Download PDF

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Publication number
WO2022145185A1
WO2022145185A1 PCT/JP2021/045156 JP2021045156W WO2022145185A1 WO 2022145185 A1 WO2022145185 A1 WO 2022145185A1 JP 2021045156 W JP2021045156 W JP 2021045156W WO 2022145185 A1 WO2022145185 A1 WO 2022145185A1
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WO
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Prior art keywords
scroll
scroll compressor
main shell
manufacturing
frame
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PCT/JP2021/045156
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English (en)
Japanese (ja)
Inventor
尭広 高橋
佑介 梅鉢
文昭 安田
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 JP2022572960A priority Critical patent/JP7459306B2/ja
Publication of WO2022145185A1 publication Critical patent/WO2022145185A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Definitions

  • Japanese Unexamined Patent Publication No. 2005-54562 paragraphs 0026 to 0048, FIG. 4
  • Japanese Patent No. 2712777 paragraph 0050, FIG. 9
  • FIG. 1 It is a vertical sectional view which shows the structure of the scroll compressor which concerns on Embodiment 1.
  • FIG. It is an upper perspective view which shows the appearance of the scroll compressor which concerns on Embodiment 1.
  • FIG. It is a perspective view which shows the structure of the main part of the main shell of the scroll compressor which concerns on Embodiment 1.
  • FIG. It is an upper perspective view and the top view which shows the structure of the main frame of the scroll compressor which concerns on Embodiment 1.
  • FIG. It It is a lower perspective view which shows the structure of the fixed scroll of the scroll compressor which concerns on Embodiment 1.
  • FIG. It is an upper perspective view and the lower perspective view which shows the structure of the swing scroll of the scroll compressor which concerns on Embodiment 1.
  • FIG. 1 It is sectional drawing which shows the manufacturing method of the scroll compressor which concerns on Embodiment 1.
  • FIG. 2 It is sectional drawing which shows the manufacturing method of the scroll compressor which concerns on Embodiment 1.
  • FIG. 2 It is sectional drawing and the perspective view which shows the manufacturing method of the scroll compressor which concerns on Embodiment 2.
  • FIG. It is sectional drawing, the front view and the perspective view which show the manufacturing method of the scroll compressor which concerns on Embodiment 3.
  • FIG. 1 It is sectional drawing which shows the manufacturing method of the scroll compressor which concerns on Embodiment 1.
  • the scroll compressor 101 is composed of a shell 1, a main frame 2, a compression mechanism unit 3, a drive mechanism unit 4, a subframe 5, a crankshaft 6, a bush 7, and a power feeding unit 8.
  • the shell 1 is a housing made of metal with both ends closed, and is composed of a main shell 11, an upper shell 12, and a lower shell 13 as shown in FIG.
  • the main shell 11 has a cylindrical shape, and a suction pipe 14 is connected to a side wall thereof by welding or the like.
  • the suction pipe 14 is a pipe that introduces the refrigerant into the shell 1 and communicates with the inside of the main shell 11.
  • the upper shell 12 has a substantially hemispherical shape, and a part of the side wall thereof is connected by welding or the like at the upper end portion 11a of the main shell 11 in the U direction to cover the opening of the upper end portion 11a of the main shell 11.
  • a discharge pipe 15 is connected to the upper part of the upper shell 12 by welding or the like.
  • the discharge pipe 15 is a pipe that discharges the refrigerant to the outside of the shell 1 and communicates with the internal space of the main shell 11.
  • the lower shell 13 has a substantially hemispherical shape, and a part of the side wall thereof is connected to the lower end portion 11b of the main shell 11 in the L direction by welding or the like to cover the opening of the lower end portion 11b of the main shell 11.
  • the shell 1 is supported by a fixing base 16 having a plurality of screw holes. A plurality of screw holes are formed in the fixing base 16, and by screwing screws into these screw holes, the scroll compressor can be fixed to other members such as the housing of the outdoor unit.
  • the main frame 2 is a hollow frame made of a metal such as cast iron and having cavities as shown in FIGS. 4 (a) and 4 (b), and is provided inside the shell 1.
  • the main frame 2 includes a main body portion 21, a main bearing portion 22, and an oil return pipe 23.
  • the main body portion 21 is fixed to the inner wall surface of the main shell 11 near the upper end portion 11a, and an accommodating portion 211 is formed in the center thereof along the longitudinal direction of the shell 1.
  • the main body portion 21 on the upper end side of the main frame 2 is open, and the main bearing portion 22 on the lower end side is provided with a step, so that the opening is narrow.
  • An annular flat surface 212 is formed on the upper end side of the main body 21 so as to surround the accommodating portion 211.
  • a ring-shaped thrust plate 24 made of a steel plate-based material such as valve steel is arranged on the flat surface 212.
  • the thrust plate 24 functions as a thrust bearing. Since the thrust plate 24 functions as a thrust bearing, a detent to suppress rotation is required.
  • a protrusion thinner than the thickness of the thrust plate 24 is provided on the flat surface 212 of the main frame 2 to suppress the rotation of the thrust plate 24, or the main frame 2 has a groove and the thrust plate 24 has a groove.
  • a structure such as forming a protrusion and fitting both parts is conceivable.
  • a suction port 213 is formed at a position that does not overlap with the thrust plate 24 on the outer peripheral side of the flat surface 212 of the main frame 2.
  • the suction port 213 is a notch portion that penetrates the main body portion 21 in the vertical direction, that is, to the upper shell 12 side and the lower shell 13 side.
  • two suction ports 213 and two oil return pipes 23 are provided, but the number is not limited to these. Further, although the suction port 213 is used as a notch, there is no problem even if the shape of the through hole is formed.
  • the shaft hole 221 penetrates the main bearing portion 22 in the vertical direction, and its upper end side in the U direction communicates with the accommodating portion 211.
  • the oil return pipe 23 is a pipe for returning the lubricating oil accumulated in the accommodating portion 211 to the oil reservoir inside the lower shell 13, and is inserted and fixed in the oil drain hole formed through the main frame 2 inside and outside. ..
  • the lubricating oil is, for example, a refrigerating machine oil containing an ester-based synthetic oil.
  • the lubricating oil is stored in the lower end of the shell 1 in the L direction, that is, in the lower shell 13, is sucked up by the oil pump 52 described later, passes through the oil passage 63 in the crankshaft 6, and is a machine such as the compression mechanism unit 3. Reduces wear between parts that come into contact with each other, controls the temperature of sliding parts, and improves sealing performance.
  • As the lubricating oil an oil having excellent lubrication characteristics, electrical insulation, stability, refrigerant solubility, low-temperature fluidity and the like, and having an appropriate viscosity is suitable.
  • the compression mechanism unit 3 is a compression mechanism that compresses the refrigerant.
  • the compression mechanism unit 3 is a scroll compression mechanism including a fixed scroll 31 and a swing scroll 32.
  • the fixed scroll 31 is made of a metal such as cast iron and includes a first substrate 311 and a first spiral body 312 as shown in FIG.
  • the first substrate 311 has a disk shape, and a discharge port 313 is formed in the center thereof so as to penetrate in the vertical direction.
  • the first spiral body 312 protrudes from the back surface of the first substrate 311 to form a spiral wall, and the tip thereof protrudes in the L direction.
  • the oscillating scroll 32 is made of a metal such as aluminum, and as shown in FIGS.
  • the second substrate 321 has a front surface on which the second spiral body 322 is formed, a back surface having at least a part of the sliding surface 3211, and a side surface 3212 located on the outer peripheral portion in the radial direction and connecting the front surface and the back surface. It has a disk shape provided, and its sliding surface 3211 is slidably supported (supported) by the main frame 2 so as to be slidable on the thrust plate 24.
  • the second spiral body 322 protrudes from the surface of the second substrate 321 to form a spiral wall, and the tip thereof protrudes in the U direction.
  • a seal member for suppressing leakage of the refrigerant is provided at the tip of the first spiral body 312 of the fixed scroll 31 and the second spiral body 322 of the rocking scroll 32.
  • the tubular portion 323 is a cylindrical boss formed so as to project in the L direction from substantially the center of the back surface of the second substrate 321.
  • a swing bearing that rotatably supports the slider 71 described later, a so-called journal bearing is provided so that its central axis is parallel to the central axis of the crankshaft 6. ..
  • the second Oldham groove 324 is an oval-shaped groove formed on the back surface of the second substrate 321.
  • the second Oldham groove 324 is provided so that a pair faces each other.
  • the line connecting the pair of second Oldham grooves 324 is provided so as to be orthogonal to the line connecting the pair of first Oldham grooves 215.
  • An old dam ring 33 is provided in the old dam accommodating portion 214 of the main frame 2.
  • the old dam ring 33 includes a ring portion 331, a first key portion 332, and a second key portion 333.
  • the first key portion 332 is formed so as to face the back surface side of the ring portion 331 in the L direction so as to face each other, and is accommodated in the pair of first old dam grooves 215 of the main frame 2.
  • the second key portion 333 is formed so as to face the U-direction surface side of the ring portion 331 so as to face each other, and is accommodated in the pair of second Oldham grooves 324 of the swing scroll 32.
  • the refrigerant comprises, for example, a halogenated hydrocarbon having a carbon double bond, a halogenated hydrocarbon having no carbon double bond, a hydrocarbon, or a mixture containing them in the composition.
  • the halogenated hydrocarbon having a carbon double bond is an HFC (Hybrid fiber-coaxial) refrigerant having a zero ozone layer destruction coefficient, a Freon-based low GWP (Global Warming Potential) refrigerant, and has a chemical formula of C 3 H 2 F.
  • HFO1234yf (2,3,3,3-tetrafluoro-1-propene), HFO1234ze (trans-1,3,3,3-tetrafluoropropene), HFO1243zf (3,3,3-trifluoro) represented by 4 .
  • Tetrafluoropropene such as propylene
  • the halogenated hydrocarbon having no carbon double bond include a refrigerant in which R32 (difluoromethane) represented by CH 2 F 2 and R41 (CH 3F, fluoromethane) are mixed.
  • the hydrocarbon include propane and propylene which are natural refrigerants.
  • the mixture include a mixed refrigerant in which R32, R41 and the like are mixed with HFO1234yf, HFO1234ze, HFO1243zf and the like.
  • the main shell 11 has a stepped portion whose inner diameter decreases in the L direction.
  • the first positioning surface 113 and the second positioning surface 116 are formed so as to be substantially perpendicular to the central axis of the crankshaft 6 and the normal vectors of both positioning surfaces face in the same direction. ..
  • the position of the feeding portion 8 with respect to the second positioning surface 116 is such that the feeding terminal 82 of the feeding portion 8 is located downward in the axial direction (L direction) of the second positioning surface 116, and the second positioning surface 116 and the feeding terminal 82 are positioned.
  • the main frame 2 is formed with a plurality of protrusions 216 protruding in the radial direction from the outer peripheral surface of the main body portion 21.
  • the axial position of the main frame 2 is determined by abutting (contacting) the protrusion 216 as a positioning portion provided on the axial end surface of the outer periphery of the main frame 2 with the second positioning surface 116 formed on the main shell 11. .. Further, in this state, the center position is determined by fixing to the second inner wall surface 114 of the main shell 11 by press fitting, shrink fitting, or the like.
  • the range of the protrusion 216 is not the entire circumference but a part thereof, the holding force received from the main shell can be lowered and the deformation of the main frame 2 can be suppressed. This makes it possible to obtain a high-performance, high-quality scroll compressor. If the holding force is insufficient, arc spot welding or the like may be further applied to the contact surface between the main shell 11 and the protrusion 216. As described above, the main frame 2 can be held by the main shell 11 in a state where the center position and the height position in the axial direction are determined.
  • the protrusion 216 is formed on the lower shell 13 side of the flat surface 212 of the main frame 2 (the surface installed via the sliding surface 3211 of the swing scroll 32 and the thrust plate 24). As a result, the flat surface 212 is prevented from being deformed by the holding force, so that a high-performance scroll compressor with low loss can be obtained.
  • the straight line connecting the centers of the pair of first Oldham grooves 215 is orthogonal to the Oldam central axis B and the Oldam central axis, and the distances from the pair of first Oldam grooves 215 are equal.
  • Let the straight line be the orthogonal axis C of symmetry.
  • the first key portion 332 of the old dam ring 33 is inserted into the pair of first old dam grooves 215 and slides along the groove 215.
  • the load is evenly applied to the pair of first Oldam grooves 215 when the mainframe 2 receives the holding force. Be loaded.
  • the pair of first Oldham grooves 215 does not have an axial deviation and a difference in groove width, so that a highly efficient scroll compressor with reduced sliding resistance of the Oldam ring 33 can be obtained.
  • the protrusion 216 is arranged on the Oldham central axis B and the Oldam symmetry axis C as shown in this figure, in the case of shrink fitting, the first Oldham groove 215 is applied to the protrusion 216 on the Oldam central axis B.
  • the first Oldham groove 215 Since the pressure applied in the direction in which the groove width is widened and the pressure applied in the direction in which the groove width of the first Oldham groove 215 is narrowed due to the load applied to the protrusion 216 on the axis of symmetry C of the Oldham are balanced, the first Oldham groove 215 Since the deformation itself can be suppressed, a high-performance scroll compressor can be obtained.
  • the refrigerant sucked into the shell 1 from the suction pipe 14 reaches the refrigerant intake space 37 through the suction port 213 of the main frame 2, and swings with the fixed scroll 31. It is taken into the compression chamber 34 formed by the moving scroll 32. Then, the refrigerant is compressed by reducing its volume while moving from the outer peripheral portion toward the center along with the eccentric revolution motion of the rocking scroll 32.
  • the swing scroll 32 moves in the radial direction together with the bush 7 due to its own centrifugal force, and the side wall surfaces of the second spiral body 322 and the first spiral body 312 come into close contact with each other.
  • the compressed refrigerant reaches the discharge hole 351 of the fixed scroll 31 from the discharge port 313 of the fixed scroll 31 and is discharged to the outside of the shell 1 against the discharge valve 36.
  • a step is formed by the protruding portion 112 (step S1203). Therefore, the inner diameter r1 of the first inner wall surface 111 is larger than the inner diameter r2 of the second inner wall surface 114.
  • the first protruding portion 112 is formed in the direction of the upper shell 12 with respect to the second protruding portion 115, and the inner wall surface thereof becomes the second inner wall surface 114.
  • the second protrusion 115 may be formed after the first protrusion 112 is formed.
  • connection portion of the first protrusion 112 with the first inner wall surface 111 (the side of the first inner wall surface 111 of the first positioning surface 113) and the connection portion of the second protrusion 115 with the second inner wall surface 114.
  • dents having a concave shape in the outer peripheral direction are formed (step S1204).
  • the dent is a so-called "nusumi” that removes a curved surface that is likely to occur in the connection portion by cutting. That is, as a result of cutting, the connecting portion between the first inner wall surface 111 and the first positioning surface 113 may not be at a right angle and may be rounded.
  • the fixed scroll 31 When the radius is formed in the portion, even if the fixed scroll 31 is arranged on the first protruding portion 112, it floats without contacting the first positioning surface 113, and the positioning accuracy is lowered. On the other hand, by forming the recess 1131, the fixed scroll 31 surely contacts the first positioning surface 113, so that the positioning accuracy can be improved. This also applies to the connection portion between the second inner wall surface 114 and the second positioning surface 116, and the positioning accuracy of the main frame 2 can be improved.
  • the region E of the main shell 11 is heated while cooling the feeding unit 8.
  • the main frame 2 is inserted in the L direction from the upper end side in the U direction of the main shell 11 while cooling the feeding portion 8, and is shrink-fitted.
  • the main frame 2 comes into contact with the second positioning surface 116 of the second protrusion 115 on a surface, and is positioned in the height direction (step S1205). Cooling is performed by local air cooling D with a fan or the like in the internal space of the cover 81. In the case of shrink fitting only, the shell 1 is then cooled (step S1206).
  • step S1207 the protrusion 216 of the main frame 2 is formed into the region I (second inner wall surface 114) of the main shell 11 while cooling the feeding portion 8. )
  • step S1208 the shell 1 is cooled.
  • the crankshaft 6 is inserted into the shaft hole 221 of the main frame 2, the bush 7 is attached to the eccentric shaft portion 62, and the old dam ring 33 and the swing scroll are further attached. 32 etc. are arranged.
  • the fixed scroll 31 is inserted from the upper end side of the main shell 11 in the U direction.
  • the fixed scroll 31 comes into contact with the first positioning surface 113 of the first protrusion 112 on a surface and is positioned in the height direction. In that state, the side surface 3111 of the first substrate 311 of the fixed scroll 31 is fixed to the first inner wall surface 111 by shrink fitting.
  • the main shell 11 and the upper shell 12 are fixed by welding, arc spot welding, or the like.
  • the main frame is equivalent to the method of connecting the main frame 2 and the fixed scroll 31 with screws or the like as in Patent Document 1 shown in the preceding example. 2.
  • the refrigerant intake space 37 can be expanded while assembling the fixed scroll 31 and the swing scroll 32. Since no screws or the like are used, the number of parts can be reduced and manufacturing can be facilitated. Further, by locally cooling a component having low heat resistance (glass terminal or the like), the distance limitation between the components can be relaxed.
  • the compression mechanism unit 3 having the fixed scroll 31 and the swing scroll 32 and the main that holds the swing scroll 32 slidably.
  • the fixed scroll 31 is fixed to the first inner wall surface 111 of the main shell 11 by shrink fitting, the fixed scroll is held without using a fastening member such as a bolt. This makes assembly easier, and the number of parts is reduced, so that the cost of the scroll compressor can be reduced.
  • the fixed scroll 31 is fixed to the first inner wall surface 111, the side surface 3212 located on the outermost side in the radial direction of the rocking scroll 32 and the inner wall surface of the main shell 11 face each other, and the main frame 2 is formed. Since the structure is such that it does not intervene between the side surface 3212 of the second substrate 321 and the inner wall surface of the main shell 11, a peripheral wall for fixing the fixed scroll as shown in Patent Document 2 is formed in the main frame. It is possible to arrange the fixed scroll in the shell and expand the refrigerant intake space in which the oscillating scroll is arranged. For example, the younger brother 1 vortex body 312 of the fixed scroll 31 and the second vortex body of the oscillating scroll 32 can be expanded. By enlarging 322, the discharge capacity for the physique of the scroll compressor can be increased.
  • a high-pressure refrigerant for example, R32 which has a low environmental load but a large load on the thrust bearing, and can reduce the environmental load of the scroll compressor. ..
  • the fixed scroll 31 is in contact with the first positioning surface 113 of the main shell 11 on the surface of the first substrate 311 on the side forming the first spiral body 312, the fixed scroll 31 is brought into contact with the first substrate 311 of the fixed scroll 31. Even when a high voltage is applied, since it is pressed against the first positioning surface 113, the fixed scroll is held more firmly, and the translational movement of the fixed scroll can be suppressed.
  • the directions of the first positioning surface 113 and the second positioning surface 116 of the main shell 11 are the same, even if the main frame 2 receives a thrust load from the swing scroll 32, it is pressed against the second positioning surface 116. , The mainframe is held more firmly, and the translational movement of the mainframe can be suppressed. This makes it possible to improve the reliability of the scroll compressor.
  • the processing is performed from one direction, the processing becomes easy and the processing time is shortened, so that the cost of the scroll compressor can be reduced.
  • the swing scroll 32 and the fixed scroll 31 can be sequentially inserted and fixed in the same posture as the main shell 11, that is, one-way assembly. Therefore, it is easy to assemble and the cost of the scroll compressor can be reduced.
  • the cooling metal is brought into contact with the terminal cover to cool the power feeding unit 8, so that damage to the terminals can be suppressed. It can improve the quality of the scroll compressor.
  • the chiller is brought into contact with the terminal cover for cooling, but the present invention is not limited to this, and for example, the feeding terminal 82 may be brought into contact with the chiller.
  • Embodiment 3 In the second embodiment, the chiller 84 is brought into contact with the terminal cover 81 of the feeding unit 8 for cooling, but in the third embodiment, a case where the terminal cover 81 is provided with a notch and is brought into contact with the main shell 11 will be described. ..
  • FIG. 16A is a sectional view showing a cooling method in the method for manufacturing a scroll compressor according to the third embodiment
  • FIG. 16B is a front view of the terminal cover 81
  • FIG. 16 (c) is a perspective view of a chiller used for cooling.
  • the feeding unit 8 is provided with a notch 811 (see FIG. 16B) in the terminal cover 81, and the contact surface 841 of the chiller 84 (see FIG. 16C). Is brought into contact with the outer peripheral surface of the main shell 11 through the notch 811 portion.
  • the shape of the notch 811 and the shape of the chiller 84 are not limited to this.
  • the thermal resistance between the contact portions can be reduced and the contact property can be improved, so that the cooling can be performed efficiently.
  • the heat conductive sheet 85 is made of a non-metal material or a composite material that can withstand the temperature of the contact portion.
  • Other configurations and manufacturing methods of the scroll compressor according to the fourth embodiment are the same as those of the scroll compressor 101 and the manufacturing method of the first embodiment, and the corresponding parts are designated by the same reference numerals and the description thereof is omitted. do.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

L'invention concerne un procédé destiné à la fabrication d'un compresseur à spirale (101) comprenant : une partie mécanisme de compression (3) ayant une spirale fixe (31) et une spirale d'oscillation (32) ; et un cadre principal (2) qui maintient de manière coulissante la spirale d'oscillation (32). Le procédé comprend : une étape d'insertion du cadre principal (2) le long d'une paroi interne d'une enveloppe principale (11) moulée tubulaire et la réalisation d'un positionnement par la mise en place d'une partie de positionnement (partie saillante (216)) de la circonférence extérieure du cadre principal (2) en contact avec une deuxième surface de positionnement (116) d'une partie étagée disposée de manière annulaire sur la paroi interne ; et une étape de fixation du cadre principal (2) par apport de chaleur tout en refroidissant une partie d'alimentation électrique (8) disposée sur la circonférence externe de l'enveloppe principale (11). La réalisation d'un refroidissement local permet de limiter les restrictions relatives aux distances entre les composants et de réduire le coût.
PCT/JP2021/045156 2020-12-28 2021-12-08 Procédé de fabrication d'un compresseur à spirale, et compresseur à spirale WO2022145185A1 (fr)

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JP2022572960A JP7459306B2 (ja) 2020-12-28 2021-12-08 スクロール圧縮機の製造方法およびスクロール圧縮機

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JP2020218418 2020-12-28
JP2020-218418 2020-12-28

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012219800A (ja) * 2011-04-14 2012-11-12 Daikin Industries Ltd 圧縮機
JP2019157723A (ja) * 2018-03-12 2019-09-19 三菱電機株式会社 スクロール圧縮機、冷凍装置及び空調装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012219800A (ja) * 2011-04-14 2012-11-12 Daikin Industries Ltd 圧縮機
JP2019157723A (ja) * 2018-03-12 2019-09-19 三菱電機株式会社 スクロール圧縮機、冷凍装置及び空調装置

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JPWO2022145185A1 (fr) 2022-07-07

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