WO2022145185A1

WO2022145185A1 - Method for manufacturing scroll compressor and scroll compressor

Info

Publication number: WO2022145185A1
Application number: PCT/JP2021/045156
Authority: WO
Inventors: 尭広高橋; 佑介梅鉢; 文昭安田
Original assignee: 三菱電機株式会社
Priority date: 2020-12-28
Filing date: 2021-12-08
Publication date: 2022-07-07
Also published as: JP7459306B2; JPWO2022145185A1

Abstract

This method is for manufacturing a scroll compressor (101) provided with: a compression mechanism part (3) having a fixed scroll (31) and an oscillation scroll (32); and a main frame (2) that slidably holds the oscillation scroll (32). The method includes: a step for inserting the main frame (2) along an inner wall of a tubular molded main shell (11) and performing positioning by bringing a positioning part (protrusion (216)) of the outer circumference of the main frame 2 into contact with a second positioning surface (116) of a stepped part annularly provided to the inner wall; and a step for fixing the main frame (2) by input of heat while cooling a power supply part (8) provided to the outer circumference of the main shell (11). By performing local cooling, restrictions on distances between components are eased and cost is reduced.

Description

Manufacturing method of scroll compressor and scroll compressor

This application relates to a method for manufacturing a scroll compressor and a scroll compressor.

For example, Patent Document 1 describes the effects of heat deformation and breakage of parts with low heat resistance (glass terminals, etc.) when fixing internal parts to the shell by welding or shrink fitting in the assembly of a scroll compressor. In order to reduce the number, (1) a method of providing a distance between a part with low heat resistance (glass terminal, etc.) and a high temperature part, (2) a method of improving the bonding force between a part with low heat resistance (glass terminal, etc.) and the shell, Is disclosed.

Further, in the scroll compressor of Patent Document 2, an annulus extending in the axial direction is formed on the outer circumference of the fixed scroll, and the frame and the bolt are fixed at the tip of the annulus. Since it is necessary to configure the compression mechanism consisting of the fixed scroll and the swing scroll inside the ring, there is a problem that the outer diameter size of the swing scroll is restricted and the output of the compressor is suppressed.

To solve this problem, a structure has been proposed in which a frame without a peripheral wall and a fixed scroll are fixed to the shell. This structure requires a fixing strength equivalent to that of the conventional fixing method in which the fixed scroll is bolted to the frame. Therefore, it is conceivable to shrink the fixed scroll into the shell and fix it by spot welding or welding from the outside of the shell.

Japanese Unexamined Patent Publication No. 2005-54562 (paragraphs 0026 to 0048, FIG. 4) Japanese Patent No. 2712777 (paragraph 0050, FIG. 9)

However, in these fixing methods, when a large amount of heat is locally applied during the fixing process, for example, in the scroll compressor of Patent Document 1, a component having low heat resistance such as a terminal is located near the heat input portion. There was a problem that the joining was hindered or damaged.

The present application has been made to solve the above-mentioned problems, and is a method for manufacturing a scroll compressor and a scroll compressor for fixing a part having low heat resistance such as a terminal and a heat input part without limiting the distance. The purpose is to obtain.

The method for manufacturing a scroll compressor disclosed in the present application is a method for manufacturing a scroll compressor including a compression mechanism unit having a fixed scroll and a swinging scroll, and a frame for holding the swinging scroll slidably. Then, the frame is inserted along the inner wall of the main shell formed into a tubular shape, and the positioning portion on the outer periphery of the frame is brought into contact with the positioning surface of the step portion provided in an annular shape on the inner wall for positioning. It is characterized by including a step of fixing the frame to the main shell by heat input while cooling the feeding portion provided on the outer periphery of the main shell.

The scroll compressor disclosed in the present application is a scroll compressor including a compression mechanism unit having a fixed scroll and an oscillating scroll, and a frame for holding the oscillating scroll slidably. It is inserted into the inner wall of the main shell formed into a tubular shape, and is positioned by bringing the positioning portion on the outer periphery of the frame into contact with the positioning surface of the frame of the step portion provided in an annular shape on the inner wall, and is positioned on the outer periphery of the main shell. The feeding portion provided in the main shell is provided between the positioning surface formed on the main shell and the driving mechanism portion for driving the swing scroll in the annular axial direction, and is formed on the side wall of the main shell. It is characterized in that the suction pipe and the main shell are provided in different phases in the outer peripheral direction.

According to the present application, the distance limitation between parts can be relaxed by locally cooling a part having low heat resistance. Further, since the dimension in the height direction can be shortened, the cost of the scroll compressor can be reduced.

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 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. It is an upper perspective view which shows the structure of the old dam ring of the scroll compressor which concerns on Embodiment 1. FIG. It is an upper perspective view which shows the structure of the crankshaft of the scroll compressor which concerns on Embodiment 1. FIG. It is an upper perspective view which shows the structure of the bush of the scroll compressor which concerns on Embodiment 1. FIG. It is sectional drawing which shows the structure of the feeding part of the scroll compressor which concerns on Embodiment 1. FIG. It is sectional drawing which shows the holding structure of the compression mechanism part of the scroll compressor which concerns on Embodiment 1. FIG. It is a flowchart which shows the manufacturing process of the manufacturing method of the scroll compressor which concerns on Embodiment 1. FIG. It is sectional drawing which shows the manufacturing method of the scroll compressor which concerns on Embodiment 1. FIG. It is sectional drawing which shows the manufacturing method of the scroll compressor which concerns on Embodiment 1. FIG. 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. It is sectional drawing which shows the manufacturing method of the scroll compressor which concerns on Embodiment 4. FIG.

Embodiment 1.
FIG. 1 is a vertical sectional view showing the configuration of the scroll compressor 101 according to the first embodiment, and FIG. 2 is a perspective view showing the appearance of the scroll compressor. 3 to 9 are perspective views of the main shell 11, the main frame 2, the fixed scroll 31, the swing scroll 32, the old dam ring 33, the crankshaft 6 and the bush 7 of the scroll compressor 101 according to the first embodiment. be. FIG. 10 is an enlarged cross-sectional view of the region A in FIG. FIG. 11 is an enlarged cross-sectional view of the region F in FIG. The scroll compressor of FIG. 1 is a so-called vertical scroll compressor used in a state where the central axis of the crankshaft is substantially perpendicular to the ground.

As shown in FIG. 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. As shown in FIG. 3, 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. In the accommodating portion 211, 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. In the first embodiment, 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. Although not shown here, for example, 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. In FIGS. 4A and 4B, 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.

An oldham accommodating portion 214 is formed at a step portion on the lower end side of the flat surface 212 of the main frame 2. A first Oldham groove 215 is formed in the Oldham accommodating portion 214. The outer end portion of the first Oldham groove 215 is formed so as to scrape a part of the outer peripheral side of the Oldam accommodating portion 214 and the inner peripheral side of the flat surface 212. Therefore, when the main frame 2 is viewed from the upper end side in the U direction, a part of the first Oldham groove 215 overlaps with the thrust plate 24. The first Oldham groove 215 is formed so that a pair faces each other. The main bearing portion 22 is continuously formed on the lower end side in the L direction of the main body portion 21, and a shaft hole 221 is formed inside the main bearing portion 22. 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. 6 (a) and 6 (b), the second substrate 321 and the second spiral body 322, the tubular portion 323 and the second oldham groove are formed. It is equipped with 324. 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. On the inner peripheral surface of the tubular portion 323, 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. As shown in FIG. 7, 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. When the swing scroll 32 revolves due to the rotation of the crankshaft 6, the first key portion 332 slides on the first Oldham groove 215 and the second key portion 333 slides on the second Oldam groove 324, whereby the Oldam ring 33 becomes. , Prevents the swing scroll 32 from rotating.

The compression chamber 34 is formed by engaging the first spiral body 312 of the fixed scroll 31 and the second spiral body 322 of the rocking scroll 32 with each other. Since the volume of the compression chamber 34 decreases from the outer peripheral side to the inner peripheral side in the radial direction, the refrigerant is taken in from the outer peripheral side end of the spiral body and moved to the central side to gradually compress the compression chamber 34. Will be done. The compression chamber 34 communicates with the discharge port 313 at the center of the fixed scroll 31. On the surface of the fixed scroll 31, a muffler 35 having a discharge hole 351 is provided, and a discharge valve 36 that opens and closes the discharge hole 351 in a predetermined manner to prevent backflow of the refrigerant is provided.

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) is exemplified. Examples of 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. Examples of the hydrocarbon include propane and propylene which are natural refrigerants. Examples of the mixture include a mixed refrigerant in which R32, R41 and the like are mixed with HFO1234yf, HFO1234ze, HFO1243zf and the like.

The drive mechanism unit 4 is provided on the lower end side in the L direction of the main frame 2 inside the shell 1. The drive mechanism unit 4 includes a stator 41 and a rotor 42. The stator 41 is formed in a ring shape, for example, with a stator formed by winding windings around an iron core formed by laminating a plurality of electromagnetic steel sheets via an insulating layer. The stator 41 is fixedly supported inside the main shell 11 by shrink fitting or the like. The rotor 42 is a cylindrical rotor having a permanent magnet built in an iron core made by laminating a plurality of electrical steel sheets and having a through hole penetrating in the vertical direction in the center, and is arranged in the internal space of the stator 41. ing.

The subframe 5 is a frame made of metal such as cast iron, and is provided on the lower end side of the drive mechanism portion 4 inside the shell 1 in the L direction. The subframe 5 is fixedly supported on the inner peripheral surface of the main shell 11 near the lower end portion 11b by shrink fitting, welding, or the like. The subframe 5 includes an auxiliary bearing portion 51 and an oil pump 52. The sub-bearing portion 51 is a ball bearing provided in the central portion of the sub-frame 5, and has a hole in the center that penetrates in the vertical direction. The oil pump 52 is provided below the central portion of the subframe 5, and is arranged so that at least a part of the oil pump 52 is immersed in the lubricating oil stored in the oil reservoir of the shell 1. Although a ball bearing is illustrated as the auxiliary bearing portion 51 in FIG. 1, there is no problem even if this is a journal bearing, for example.

The crankshaft 6 is a long metal rod-shaped member, which is provided inside the shell 1. As shown in FIG. 8, the crankshaft 6 includes a main shaft portion 61, an eccentric shaft portion 62, and an oil passage 63. The main shaft portion 61 is a shaft constituting the main portion of the crankshaft 6, and the central shaft thereof is arranged so as to coincide with the central shaft of the main shell 11. A rotor 42 is contact-fixed to the outer surface of the spindle portion 61. The eccentric shaft portion 62 is provided at the upper end portion of the spindle portion 61 in the U direction so that the central shaft thereof is eccentric with respect to the central axis of the spindle portion 61. The oil passage 63 is provided so as to vertically penetrate the inside of the main shaft portion 61 and the eccentric shaft portion 62. In the crankshaft 6, the upper end portion in the U direction of the main shaft portion 61 is inserted into the main bearing portion 22 of the main frame 2, and the lower end portion in the L direction is inserted and fixed in the sub bearing portion 51 of the subframe 5. As a result, the eccentric shaft portion 62 is arranged in the cylinder of the tubular portion 323, and the outer peripheral surface of the rotor 42 is arranged with a predetermined gap from the inner peripheral surface of the stator 41. Further, a first balancer 64 is provided near the upper end of the main shaft portion 61 in the U direction, and a second balancer 65 is provided near the lower end in the L direction in order to offset the imbalance caused by the swing of the swing scroll 32.

The bush 7 is made of a metal such as iron and is a connecting member for connecting the swing scroll 32 and the crankshaft 6. As shown in FIG. 9, the bush 7 is composed of two members in the present embodiment, and includes a slider 71 and a balance weight 72. The slider 71 is a cylindrical member on which a cross is formed, and is fitted into each of the eccentric shaft portion 62 and the tubular portion 323. The balance weight 72 is a donut-shaped member having a weight portion 721 whose shape when viewed from the U direction is substantially C-shaped, and is eccentric with respect to the center of rotation in order to cancel the centrifugal force of the swing scroll 32. It is provided. The balance weight 72 is fitted to the crossguard of the slider 71 by a method such as shrink fitting. The bush 7 may be a member in which the slider 71 and the balance weight 72 are integrally machined, for example, by machining.

The power feeding unit 8 is a power feeding member that supplies power to the scroll compressor, and is formed on the outer peripheral surface of the main shell 11 of the shell 1. The phase, which is the position in the circumferential direction in the plane perpendicular to the axial direction of the feeding portion 8, is provided so as to be different from the phase in which the suction pipe 14 is provided. The phase difference between the feeding unit 8 and the suction pipe 14 is preferably 90 ° to 270 °, and is set to 100 ° in this embodiment. The feeding unit 8 includes a cover 81, a feeding terminal 82, and a wiring 83. The cover 81 is a cover member having a bottomed opening. The power feeding terminal 82 is made of a metal member, and as shown in FIG. 10, one is provided inside the cover 81 and the other is provided inside the main shell 11. One of the wiring 83 is connected to the feeding terminal 82, and the other is connected to the winding of the stator 41.

Next, the relationship between the holding structure for holding the main frame 2 and the fixed scroll 31 in the main shell 11 and the main shell 11, the main frame 2, and the compression mechanism unit 3 will be described in detail.

As shown in FIG. 3, the main shell 11 is an end surface of the first protrusion 112 that protrudes radially from the first inner wall surface 111 and the first protrusion 112 that faces the upper shell 12, and is a fixed scroll 31. Further radially projecting from the first positioning surface 113 that contacts the first substrate 311 to determine the axial position of the fixed scroll 31, the second inner wall surface 114 that is the inner wall surface of the first protruding portion 112, and the first protruding portion 112. A second positioning surface that contacts the main body 21 of the main frame 2 at the end faces of the second protrusion 115 and the upper shell 12 of the second protrusion 115 to determine the axial position of the main frame 2. It has a third inner wall surface 117 which is an inner wall surface of the 116 and the second protruding portion 115. That is, the main shell 11 has a stepped portion whose inner diameter decreases in the L direction. At this time, 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. .. Further, 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. It is desirable that the axial distance from the upper end of the fixed portion is 5 mm to 7 mm. The corners where the first positioning surface 113 and the first inner wall surface 111 intersect, and the corner portions where the second positioning surface 116 and the second inner wall surface 114 intersect, are shown in FIGS. 11 (a), 11 (b), and FIG. As shown in FIG. 11 (c), recesses 1131 and 1161 are provided, respectively. As a result, the fixed scroll 31 and the main frame 2 can be reliably brought into contact with each positioning surface.

As shown in FIGS. 4 (a) and 4 (b), 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. At this time, since 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.

Next, the positional relationship between the protrusion 216 of the main frame 2 and the pair of first Oldham grooves 215 will be described.
As shown in FIG. 4B, 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. By arranging the protrusions 216 axisymmetrically with respect to the Oldham central axis B and the Oldam symmetry axis C, the load is evenly applied to the pair of first Oldam grooves 215 when the mainframe 2 receives the holding force. Be loaded. As a result, 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. Further, when 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. 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 axial position of the fixed scroll 31 is determined by applying the surface of the first substrate 311 of the fixed scroll 31 on the side forming the first spiral body 312 to the first positioning surface 113 formed on the main shell 11. Further, in this state, the center position is determined by fixing the side surface 3111 of the first substrate 311 to the first inner wall surface 111 of the main shell 11 by shrink fitting. As described above, the fixed scroll 31 can be held in the main shell 11 in a state where the center position and the height position in the axial direction are determined. Although not shown here, the position of the fixed scroll 31 can be completely constrained by adjusting the phase of the fixed scroll 31 using, for example, a positioning pin. In this embodiment, the fixed scroll 31 has a high / low voltage separation function inside the shell 1.

Next, the operation of the scroll compressor 101 of the first embodiment will be described.
When the power supply terminal 82 of the power supply unit 8 is energized, torque is generated in the stator 41 and the rotor 42, and the crankshaft 6 rotates accordingly. The rotation of the crankshaft 6 is transmitted to the swing scroll 32 via the eccentric shaft portion 62 and the bush 7. The oscillating scroll 32 to which the rotational driving force is transmitted is restricted from rotating by the old dam ring 33, and eccentrically revolves with respect to the fixed scroll 31. At that time, the other surface of the swing scroll 32 slides with the thrust plate 24.

Along with the swinging motion of the swing scroll 32, 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. During the eccentric revolution operation of the swing 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.

Next, the method of manufacturing the scroll compressor 101 of the first embodiment will be described with reference to FIG. FIG. 12 is a flowchart showing a manufacturing process in the manufacturing method of the scroll compressor 101 of the first embodiment.

First, a plate-shaped steel material is formed into a tubular shape by a roll or a press, and then a welded steel pipe is manufactured by connecting the seams by welding to form a steel pipe. 11 is manufactured (step S1201).

Subsequently, by cutting the inner wall surface of the main shell 11 by a predetermined depth in the thickness direction, a step is formed by the second inner wall surface 114 and the second protruding portion 115 for positioning and fixing the main frame 2 (step S1202). ). The thickness of the main shell 11 is, for example, 4 mm to 6 mm, and the height of the protruding portion, that is, the cutting depth by cutting is, for example, about 0.5 mm.

Next, the first inner wall surface 111 and the first inner wall surface 111 for positioning and fixing the fixed scroll 31 by cutting the inner wall surface separated from the second protruding portion 115 in the direction of the upper shell 12 by a predetermined distance in the thickness direction. 1 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. Further, 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.

Subsequently, the 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. By processing (on the side of the second inner wall surface 114 of the second positioning surface 116), 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. 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.

Next, as shown in FIG. 13A, the region E of the main shell 11 is heated while cooling the feeding unit 8. After heating, as shown in FIG. 13B, 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).

When the main frame 2 is welded to the main shell 11 after shrink fitting, as shown in FIG. 14, 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. ) By arc spot welding or the like (step S1207). After that, the shell 1 is cooled (step S1208).

In the conventional frame with an outer wall, a distance was taken in the height direction to a high temperature part such as shrink fitting or arc spot welding. In the method of manufacturing the scroll compressor 101 of the present embodiment, since the peripheral wall for fixing the fixed scroll 31 is not formed on the main frame 2, the high temperature portion such as shrink fitting or arc spot welding is close to the feeding portion. Even in this case, the temperature rise of the feeding portion can be suppressed by locally cooling the internal space of the cover 81.

Then, after cooling the shell 1 (step S1207 or step S1208), 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. Next, 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. Finally, after inserting the upper shell 12 from the upper end side of the main shell 11 in the U direction, the main shell 11 and the upper shell 12 are fixed by welding, arc spot welding, or the like.

As described above, according to the method of manufacturing the scroll compressor 101 of the first embodiment, 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.

As described above, according to the manufacturing method of the scroll compressor 101 according to the first embodiment, 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. A method for manufacturing a scroll compressor 101 including a frame 2, wherein the main frame 2 is inserted along the inner wall of a tubular main shell 11, and a second step portion provided in an annular shape on the inner wall is provided. The process of positioning by bringing the positioning portion (projection 216) on the outer periphery of the main frame 2 into contact with the positioning surface 116, and cooling the feeding portion 8 provided on the outer periphery of the main shell 11 in which the main frame 2 is positioned. Since the process of fixing the main frame 2 to the main shell 11 by heat input is included, parts with low heat resistance (glass terminals, etc.) are used in the process of fixing internal parts by shrink fitting or arc spot welding. By local cooling, the distance limitation between parts can be relaxed. Further, since the dimension in the height direction can be shortened, the cost of the scroll compressor can be reduced. Further, as in the method of connecting the main frame and the fixed scroll with screws or the like as in Patent Document 1, the refrigerant intake space can be expanded while assembling the main frame, the fixed scroll and the swing scroll. 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.

Further, since the side surface 3111 of the first substrate 311 of 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.

Further, since 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.

Further, by increasing the diameter of the thrust plate 24 together with the expansion of the swing scroll 32, it is possible to increase the sliding area and reduce the surface pressure due to the thrust load. This makes it possible to improve the reliability of the scroll compressor.

Further, by lowering the thrust load, it is possible to use 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. ..

Further, since the wall for fixing the fixed scroll 31 to the main frame 2 is not required, the processing time of the main frame can be shortened and the weight can be reduced, so that the cost of the scroll compressor can be reduced. can do.

Further, since 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.

Further, since 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.

Further, the processing of the first positioning surface 113 and the second positioning surface 116 of the main shell 11 can be continuously performed from one direction. As a result, the parallelism on both sides can be improved, so that the assembly accuracy and the position accuracy of the mainframe and the fixed scroll can be improved, and the performance of the scroll compressor can be improved.

In addition, since 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. Further, after the main frame 2 is inserted and fixed to the main shell 11 from the upper end side in the U direction, 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.

Further, by using the scroll compressor of the first embodiment as a refrigerating cycle apparatus including a condenser, an expansion valve, and an evaporator and circulating a refrigerant, a large-capacity, high-efficiency, low-cost refrigerating cycle apparatus can be used. Can be obtained.

Embodiment 2.
In the first embodiment, the power feeding unit 8 is cooled by local air cooling, but in the second embodiment, a case where a chiller is used for cooling will be described.

FIG. 15 (a) is a sectional view showing a cooling method in the method for manufacturing a scroll compressor according to the second embodiment, and FIG. 15 (b) is a perspective view of a chiller used for cooling. As shown in FIG. 15 (a), the power feeding unit 8 fixes the internal parts by shrink fitting, arc spot welding, or the like by bringing the chiller 84 (see FIG. 15 (b)) into contact with the terminal cover 81. During the process of welding, heat input to the terminals is suppressed. As a result, damage to the terminals can be suppressed, so that the quality of the scroll compressor can be improved. The chiller 84 is made of metal and has a hollow or bottomed opening shape, and has a contact surface 841 with a terminal cover at one end and a contact surface 842 with a heat absorbing portion such as a heat sink (not shown) at the other end. There is. Other configurations and manufacturing methods of the scroll compressor according to the second 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.

As described above, according to the method for manufacturing the scroll compressor according to the second embodiment, 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.

In the second embodiment, 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, and FIG. 16B is a front view of the terminal cover 81. Further, FIG. 16 (c) is a perspective view of a chiller used for cooling. As shown in FIG. 16A, 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.

In the third embodiment, the terminal cover 81 is provided with a notch 811 and the cooling metal 84 is brought into contact with the main shell 11, so that the thermal resistance between the terminal cover 81 and the main shell 11 can be reduced. , Can be cooled efficiently. This can improve the quality and performance of the scroll compressor. Other configurations and manufacturing methods of the scroll compressor according to the third embodiment are the same as those of the scroll compressor 101 and the manufacturing method according to the first embodiment, and the corresponding parts are designated by the same reference numerals and the description thereof is omitted. do.

As described above, according to the method for manufacturing a scroll compressor according to the third embodiment, the cooling metal 84 is brought into contact with the main shell 11 via the notch 811 provided in the terminal cover 81 to cool the feeding unit 8. Because of this, the thermal resistance between the terminal cover and the main shell can be reduced, so efficient cooling can prevent terminal damage, the quality of the scroll compressor, and Performance can be improved.

Embodiment 4.
In the second embodiment and the third embodiment, the chiller 84 is directly brought into contact with the terminal cover 81 or the main shell for cooling, but in the fourth embodiment, the chiller 84 is attached to the terminal cover 81 or the main shell 11. , The case of contacting via a heat conductive sheet will be described.

FIG. 17 is a cross-sectional view showing a cooling method in the method for manufacturing a scroll compressor according to the fourth embodiment, and FIG. 17A is a diagram showing a case where the contact surface 841 of the chiller 84 is brought into contact with the terminal cover 81. 17 (b) shows a diagram in which the contact surface 841 of the chiller 84 is brought into contact with the main shell 11 through the notch 811 portion provided in the terminal cover 81. As shown in FIGS. 17A and 17B, the power feeding unit 8 attaches the chiller 84 to the terminal cover 81 and the main shell 11, respectively, and the heat conductive sheet 85 attached to the contact surface 841 of the chiller 84, respectively. To make contact through.

In the fourth embodiment, by attaching the heat conductive sheet 85 to the chiller 84, 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. This can improve the quality and performance of the scroll compressor. 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.

As described above, according to the method for manufacturing the scroll compressor according to the fourth embodiment, the chiller 84 is brought into contact with the terminal cover 81 or the main shell 11 via the heat conductive sheet 85 attached to the contact surface 841. Since the feeding portion 8 is cooled, the thermal resistance between the contact portions can be reduced and the contactability can be improved. Therefore, efficient cooling can suppress damage to the terminals. The quality and performance of the scroll compressor can be improved.

Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are applications of a particular embodiment. It is not limited to, but can be applied to embodiments alone or in various combinations. Therefore, innumerable variations not exemplified are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

2 main frame, 3 compression mechanism part, 8 power supply part, 11 main shell, 31 fixed scroll, 32 swing scroll, 101 scroll compressor, 116 second positioning surface, 216 protrusions.

Claims

A method for manufacturing a scroll compressor including a compression mechanism portion having a fixed scroll and a swing scroll, and a frame that slidably holds the swing scroll.
A step of inserting the frame along the inner wall of the main shell formed into a tubular shape, and positioning by contacting the positioning portion on the outer circumference of the frame with the positioning surface of the step portion provided in an annular shape on the inner wall.
A step of fixing the frame to the main shell by heat input while cooling the feeding portion provided on the outer periphery of the main shell.
A method of manufacturing a scroll compressor, which comprises.
The feeding portion is provided between the positioning surface of the frame formed on the main shell and the driving mechanism portion for driving the swing scroll in the annular axial direction, and is formed on the side wall of the main shell. The method for manufacturing a scroll compressor according to claim 1, wherein the suction pipe and the main shell are provided in different phases in the outer peripheral direction.
The method for manufacturing a scroll compressor according to claim 2, wherein the frame is fixed to the main shell by shrink fitting.
The method for manufacturing a scroll compressor according to claim 2, wherein the frame is fixed to the main shell by welding.
The method for manufacturing a scroll compressor according to any one of claims 1 to 4, wherein the feeding unit is cooled by air cooling.
The method for manufacturing a scroll compressor according to any one of claims 1 to 4, wherein the feeding unit is cooled by bringing a chiller into contact with a terminal cover.
Any one of claims 1 to 4, wherein the feeding unit is cooled by bringing a chiller into contact with an outer peripheral surface of the main shell through a notch provided in the terminal cover. The manufacturing method of the scroll compressor described in.
The method for manufacturing a scroll compressor according to any one of claims 1 to 4, wherein the feeding unit is cooled by bringing a cooling metal into contact with a feeding terminal.
The method for manufacturing a scroll compressor according to any one of claims 6 to 8, wherein the feeding unit is brought into contact with the chiller via a heat conductive sheet.
The fixed scroll is inserted into the inner wall of the main shell, and is positioned by bringing the outer peripheral portion of the fixed scroll into contact with the positioning surface of the fixed scroll at a step portion provided in an annular shape on the inner wall. The method for manufacturing a scroll compressor according to any one of claims 1 to 9.
The method for manufacturing a scroll compressor according to claim 10, wherein the positioning surface of the frame is provided on the feeding portion side in the annular axis direction with respect to the positioning surface of the fixed scroll.
One of claims 1 to 11, wherein the fixed scroll is inserted into the inner wall of the inner wall after positioning the frame, and the fixed scroll is positioned. The manufacturing method of the scroll compressor described in.
A scroll compressor including a compression mechanism having a fixed scroll and a swing scroll, and a frame that slidably holds the swing scroll.
The frame is inserted into the inner wall of the main shell formed into a tubular shape, and is positioned by bringing the positioning portion on the outer periphery of the frame into contact with the positioning surface of the frame at a step portion provided in an annular shape on the inner wall.
The feeding portion provided on the outer periphery of the main shell is provided between the positioning surface formed on the main shell and the driving mechanism portion for driving the swing scroll in the annular axial direction. A scroll compressor characterized in that the suction pipe formed on the side wall of the main shell and the scroll compressor are provided in different phases in the outer peripheral direction of the main shell.
The fixed scroll is inserted into the inner wall of the main shell, and is positioned by bringing the outer peripheral portion of the fixed scroll into contact with the positioning surface of the fixed scroll at a step portion provided in an annular shape on the inner wall. The scroll compressor according to claim 13.
The scroll compressor according to claim 14, wherein the positioning surface of the frame is provided on the feeding portion side in the annular axis direction with respect to the positioning surface of the fixed scroll.
The scroll compressor according to any one of claims 13 to 15, wherein the power feeding unit is provided with a notch on the main shell side of the terminal cover.
The scroll compressor according to claim 16, wherein the material of the terminal cover is metal.