JP7450753B2 - Scroll compressor and scroll compressor assembly method - Google Patents

Description

The present application relates to a scroll compressor and a method for assembling the scroll compressor.

For example, Patent Document 1 has a fixed scroll having a fixed base plate provided with a first spiral protrusion, and a swinging base plate provided with a second spiral protrusion that meshes with the first spiral protrusion, An oscillating scroll that forms a compression chamber for compressing refrigerant between the oscillating scroll and the fixed scroll, a frame that swingably supports the oscillating scroll, and a main body shell that accommodates the fixed scroll, the oscillating scroll, and the frame. The fixed scroll and the frame are fixed to the inner wall surface of the main body shell, the fixed base plate has a first recess formed on the side facing the frame, and the frame has a first recess formed opposite to the first recess. A scroll compressor is disclosed in which a second recess is formed at the location.

International Publication No. 2019/207783

In the scroll compressor of Patent Document 1, when the fixed scroll is inserted into the middle shell, the tip of the first spiral body provided on the fixed scroll may interfere with the tip of the second spiral body of the oscillating scroll. be. If the fixed scroll is inserted into the middle shell while the tips of the first spiral body and the second spiral body are interfering with each other, the swinging scroll will be tilted, and the parallelism and perpendicularity between the fixed scroll and the swinging scroll will be deteriorated. Here, the perpendicularity is an index indicating whether the second spiral body of the oscillating scroll is perpendicular to the substrate surface of the fixed scroll. For this reason, sliding resistance during operation of the compressor increases, airtightness between compression chambers deteriorates, and performance of the compressor deteriorates. Therefore, there is a need for a structure and an assembly method that allow the fixed scroll to be assembled without interference between the tip of the first spiral and the tip of the second spiral.

The present application discloses a technique for solving the above-mentioned problems, and is designed to avoid interference between the tip of the first spiral body of the fixed scroll and the tip of the second spiral body of the oscillating scroll during assembly. The purpose is to

The scroll compressor disclosed in the present application includes a fixed scroll having a first scroll, an oscillating scroll having a second scroll that forms a compression chamber by being engaged with the first scroll, and the oscillating scroll. an Oldham ring provided with a second key portion to be accommodated in a pair of second Oldham grooves provided in a moving scroll; and a pair of first key portions for accommodating a pair of first key portions provided in the Oldham ring. A scroll compressor comprising a main frame provided with an Oldham groove, and a shell housing the fixed scroll, the swinging scroll, and the main frame inside,
A positioning part is provided on the flat surface of the main frame, and a position confirmation part is provided on the second substrate of the oscillating scroll and is spaced from the positioning part by a predetermined distance in the horizontal direction, and the distance is a distance at which the fixed scroll does not interfere with the swinging scroll;
The positioning portion is a first recess provided in a flat surface of the main frame,
providing a phase determining member inserted into the first recess ;
When the fixed scroll is viewed in the axial direction perpendicular to the horizontal direction and from the fixed scroll toward the swinging scroll, a portion of the fixed scroll that overlaps with the position confirmation section in the horizontal direction includes: There is no passage connecting the compression chamber and a space located on the opposite side of the compression chamber across the fixed scroll.
Another scroll compressor disclosed in the present application includes a fixed scroll having a first scroll, and an oscillating scroll having a second scroll that forms a compression chamber by being engaged with the first scroll. , an Oldham ring provided with a second key portion to be accommodated in a pair of second Oldham grooves provided in the swinging scroll; and a pair of Oldham rings for accommodating a pair of first key portions provided in the Oldham ring. A scroll compressor comprising a main frame provided with a first Oldham groove, and a shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside,
A positioning part is provided on the flat surface of the main frame, and a position confirmation part is provided on the second substrate of the oscillating scroll and is spaced from the positioning part by a predetermined distance in the horizontal direction, and the distance is a distance at which the fixed scroll does not interfere with the swinging scroll;
The positioning portion is a first recess provided in a flat surface of the main frame,
providing a phase determining member inserted into the first recess;
The phase determining member is composed of a first phase determining member and a second phase determining member having different diameters.
Yet another scroll compressor disclosed in the present application includes a fixed scroll having a first scroll, and an oscillating scroll having a second scroll that forms a compression chamber by being engaged with the first scroll. , an Oldham ring provided with a second key portion to be accommodated in a pair of second Oldham grooves provided in the swinging scroll; and a pair of Oldham rings for accommodating a pair of first key portions provided in the Oldham ring. A scroll compressor comprising a main frame provided with a first Oldham groove, and a shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside,
A positioning part is provided on the flat surface of the main frame, and a position confirmation part is provided on the second substrate of the oscillating scroll and is spaced from the positioning part by a predetermined distance in the horizontal direction, and the distance is a distance at which the fixed scroll does not interfere with the swinging scroll;
The positioning portion is a convex portion provided on the flat surface of the main frame,
A tip of the convex portion is inserted into a second recess of the fixed scroll ,
When the fixed scroll is viewed from the fixed scroll toward the swinging scroll in an axial direction perpendicular to the horizontal direction, a portion of the fixed scroll that overlaps with the position confirmation portion in the horizontal direction There is no passage connecting the compression chamber and a space located on the opposite side of the fixed scroll with respect to the compression chamber .

Furthermore, the method for assembling a scroll compressor disclosed in the present application is as follows:
a fixed scroll having a first spiral; an oscillating scroll having a second volute which forms a compression chamber by being engaged with the first volute; and a pair of second volutes provided on the oscillating scroll. an Oldham ring provided with a second key portion accommodated in the Oldham groove; a main frame provided with a pair of first Oldham grooves for accommodating a pair of first key portions provided in the Oldham ring; A shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside,
A positioning part is provided on the flat surface of the main frame, and a position confirmation part is provided on the second substrate of the oscillating scroll and is spaced from the positioning part by a predetermined distance in the horizontal direction, and the distance is A method for assembling a scroll compressor in which the fixed scroll is at a distance that does not interfere with the oscillating scroll,
Detecting the positioning section and the position confirmation section with a sensor and calculating a horizontal distance between the positioning section and the position confirmation section;
and inserting the fixed scroll into the shell when the distance in the horizontal direction between the positioning section and the position confirmation section is greater than or equal to a preset threshold.

According to the scroll compressor and the method for assembling the scroll compressor disclosed in the present application, the assembly is performed after confirming that interference between the tips of the spiral bodies of the fixed scroll and the oscillating scroll can be avoided, and the fixed scroll during assembly is Interference between the tip of the first spiral body and the tip of the second spiral body of the oscillating scroll can be avoided.

1 is a perspective view showing a scroll compressor according to Embodiment 1. FIG. 1 is a schematic cross-sectional view showing a scroll compressor according to Embodiment 1. FIG. FIG. 2 is a partial perspective view showing the middle shell according to the first embodiment. 1 is a perspective view showing a main frame according to Embodiment 1. FIG. 1 is a perspective view showing a fixed scroll according to Embodiment 1. FIG. 1 is a perspective view showing an oscillating scroll according to Embodiment 1. FIG. 1 is a perspective view showing an oscillating scroll according to Embodiment 1. FIG. 1 is a perspective view showing an Oldham ring according to Embodiment 1. FIG. 1 is a perspective view showing a crankshaft according to Embodiment 1. FIG. 1 is a perspective view showing a bush according to Embodiment 1. FIG. FIG. 3 is an enlarged cross-sectional view showing the X section in FIG. 2. FIG. 11 is an enlarged sectional view of section A in FIG. 10. FIG. 11 is an enlarged sectional view of section B in FIG. 10. FIG. FIG. 3 is an enlarged cross-sectional view showing the X section in FIG. 2. FIG. 3 is a flowchart showing steps of a method for assembling a scroll compressor according to Embodiment 1. FIG. 1 is a partial cross-sectional view of a scroll compressor showing a state in which a main frame is arranged in a middle shell according to a first embodiment; FIG. FIG. 3 is a perspective view showing the relationship between the reference plane and the main frame according to the first embodiment. FIG. 3 is a partial cross-sectional view showing a state in which an oscillating scroll is arranged in the middle shell according to the first embodiment. FIG. 2 is a partially enlarged sectional view showing a main frame and an oscillating scroll portion of the scroll compressor according to Embodiment 1. FIG. FIG. 2 is a partially enlarged plan view of the main frame and the swinging scroll according to the first embodiment, viewed from one end side. FIG. 7 is a partially enlarged plan view of the main frame and the swinging scroll according to Embodiment 2, viewed from one end side. FIG. 7 is a partially enlarged plan view of the main frame and the swinging scroll according to Embodiment 3, viewed from one end side. FIG. 7 is a partially enlarged plan view of the main frame and the swinging scroll according to Embodiment 3, viewed from one end side.

Embodiment 1.
This embodiment relates to a scroll compressor used in air conditioners, refrigerators, and the like. Embodiment 1 will be described below based on the drawings. Fig. 1 is a perspective view showing a scroll compressor, Fig. 2 is a schematic vertical sectional view showing the scroll compressor, Fig. 3 is a perspective view showing a middle shell, Fig. 4 is a perspective view showing a main frame, and Fig. 5 is a perspective view showing a fixed scroll. FIG. 6A and 6B are perspective views showing the swinging scroll, with FIG. 6A being a view seen from above and FIG. 6B being a view seen from below. FIG. 7 is a perspective view showing the Oldham ring, FIG. 8 is a perspective view showing the crankshaft, and FIG. 9 is a perspective view showing the bush. The scroll compressor shown in FIG. 1 is a so-called vertical scroll compressor that is used with the central axis of the crankshaft being substantially perpendicular to the ground.

As shown in FIGS. 1 and 2, the scroll compressor includes a shell 1, a main frame 2, a compression mechanism section 3, a drive mechanism section 4, a subframe 5, a crankshaft 6, a bush 7, A power supply unit 8 is provided. Below, with the main frame 2 as a reference, the side where the compression mechanism section 3 is provided (upper side) is one end (E in the figure), and the side where the drive mechanism section 4 is provided (lower side) is the other end. (F in the figure) and the direction will be explained.
The shell 1 is a casing made of metal and closed at both ends, and includes a middle shell 11, an upper shell 12, and a lower shell 13. The middle shell 11 has a cylindrical shape, and a suction pipe 14 is connected to its side wall 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 middle shell 11.

The upper shell 12 has a substantially hemispherical shape, and a part of its side wall is connected to the upper end of the middle shell 11 by welding or the like, and covers the upper opening of the middle 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 middle shell 11. The lower shell 13 has a substantially hemispherical shape, and a part of its side wall is connected to the lower end of the middle shell 11 by welding or the like, and covers the lower opening of the middle shell 11. Note that 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 casing of the outdoor unit.

As shown in FIG. 4, the main frame 2 is made of metal such as cast iron, has a hollow portion, and is provided inside the shell 1. As shown in FIG. The main frame 2 includes a main body portion 21, a main bearing portion 22, and an oil return pipe 23. The main body part 21 is fixed to the inner wall surface on one end side of the middle shell 11, and an accommodation space 211 is formed in the center thereof along the longitudinal direction of the shell 1. The housing space 211 is open at one end and has a stepped shape in which the space narrows toward the other end. An annular flat surface 212 is formed on one end side of the main body portion 21 so as to surround the accommodation space 211 .

A ring-shaped thrust plate 24 made of a steel sheet material such as valve steel is arranged on the flat surface 212 (see FIG. 10). Therefore, in this embodiment, the thrust plate 24 functions as a thrust bearing. Note that since the thrust plate 24 functions as a thrust bearing, a rotation stopper is required to suppress rotation. Although not shown here, rotation of the thrust plate 24 can be suppressed by providing a protrusion thinner than the thickness of the thrust plate 24 on the flat surface 212 of the main frame 2, for example. Alternatively, a structure may be considered in which a groove is formed in the main frame 2 and a projection is formed in the thrust plate 24 so that both parts fit together. In the main frame 2, a suction port 213 is formed at a position on the outer end side of the flat surface 212 that does not overlap with the thrust plate 24. The suction port 213 is a space that passes through the main body portion 21 in the vertical direction, that is, the upper shell 12 side and the lower shell 13 side. In FIG. 4, one suction port 213 and two oil return pipes 23 are provided, but the number is not limited to this. Further, although the suction port 213 is a through hole, there is no problem even if it is in the shape of a notch with the outer wall removed.

An Oldham housing portion 214 is formed in a stepped portion of the main frame 2 on the other end side of the flat surface 212. A first Oldham groove 215 is formed in the Oldham housing portion 214 . The first Oldham groove 215 is formed such that a part of the outer end side cuts the inner end side of the flat surface 212. Therefore, when the main frame 2 is viewed from one end side, a portion of the first Oldham groove 215 overlaps with the thrust plate 24. The pair of first Oldham grooves 215 are formed to face each other. The main bearing part 22 is formed continuously on the other end side of the main body part 21, and has a shaft hole 221 formed therein. The shaft hole 221 is provided vertically penetrating the main bearing portion 22, and one end thereof communicates with the accommodation space 211. The oil return pipe 23 is a pipe for returning lubricating oil accumulated in the accommodation space 211 to an oil reservoir provided inside the lower shell 13, and is inserted and fixed into an oil drain hole formed penetrating inside and outside the main frame 2. ing.

The lubricating oil is, for example, refrigeration oil containing ester-based synthetic oil. Lubricating oil is stored in the lower part of the shell 1, that is, the lower shell 13, and is sucked up by an oil pump 52 (described later), passes through an oil passage 63 in the crankshaft 6, and comes into mechanical contact with the compression mechanism 3, etc. It reduces wear between parts, controls the temperature of sliding parts, and further improves sealing performance. As the lubricating oil, an oil having excellent lubricating properties, electrical insulation, stability, refrigerant solubility, low-temperature fluidity, etc., and a suitable viscosity is suitable.

The compression mechanism section 3 is a compression mechanism that compresses refrigerant. The compression mechanism section 3 is a scroll compression mechanism including a fixed scroll 31 and an oscillating scroll 32. As shown in FIGS. 2 and 5, the fixed scroll 31 is made of metal such as cast iron and includes a first substrate 311 and a first spiral body 312. The first substrate 311 is formed into a disk shape, and a discharge port 313 is formed in the center of the first substrate 311 so as to penetrate in the vertical direction. The first spiral body 312 protrudes from the other end side surface of the first substrate 311 to form a spiral wall, and its tip protrudes toward the other end side.

As shown in FIGS. 6A and 6B, the oscillating scroll 32 is made of metal such as aluminum, and includes a second substrate 321, a second spiral body 322, a cylindrical portion 323, and a second Oldham groove 324. ing. The second substrate 321 has one surface on which the second spiral body 322 is formed, the other surface in which at least a part of the outer circumferential area becomes the sliding surface 3211, and one surface located at the outermost part in the radial direction. It is formed into a disk shape with a side surface 3212 connecting the one side and the other side. The sliding surface 3211 is supported (supported) by the main frame 2 so as to be able to slide on the thrust plate 24. The second spiral body 322 protrudes from one surface of the second substrate 321 to form a spiral wall, and its tip protrudes toward one end.

Note that seal members are provided at the tips of the first spiral body 312 of the fixed scroll 31 and the second spiral body 322 of the swinging scroll 32 to suppress leakage of the refrigerant. The cylindrical portion 323 is a cylindrical boss formed to protrude from approximately the center of the other surface of the second substrate 321 toward the other end. A rocking bearing, a so-called journal bearing, which rotatably supports a slider 71 to be described later, is provided on the inner peripheral surface of the cylindrical portion 323 so that its central axis is parallel to the central axis of the crankshaft 6. . The second Oldham groove 324 is a groove formed on the other surface of the second substrate 321 and has an overall rectangular shape and an arcuate end. The two second Oldham grooves 324 forming a pair are provided to face each other. A line connecting the pair of two second Oldham grooves 324 is provided to be perpendicular to a line connecting the pair of two first Oldham grooves 215. An Oldham ring 33 is provided in the Oldham housing portion 214 of the main frame 2 .

As shown in FIG. 7, the Oldham ring 33 includes a ring portion 331, a first key portion 332, and a second key portion 333. The ring portion 331 is formed into a ring shape. The pair of two first key parts 332 are formed to face the other end side surface of the ring part 331, and are accommodated in the pair of two first Oldham grooves 215 of the main frame 2. . The pair of two second key parts 333 are formed to face one end side surface of the ring part 331, and are accommodated in the pair of two second Oldham grooves 324 of the swinging scroll 32. . When the oscillating scroll 32 revolves due to the rotation of the crankshaft 6, the first key part 332 slides with respect to the first Oldham groove 215, and the second key part 333 slides with respect to the second Oldham groove 324, so that the Oldham ring 33 prevents the swinging scroll 32 from rotating. The compression chamber 34 is formed by meshing the first spiral body 312 of the fixed scroll 31 and the second spiral body 322 of the swinging scroll 32 with each other.

Since the volume of the compression chamber 34 decreases in the radial direction from the outside toward the inside, the refrigerant is taken in from the outer end of the spiral body and gradually compressed by moving toward the center. The compression chamber 34 communicates with the discharge port 313 at the center of the fixed scroll 31 . A muffler 35 having a discharge hole 351 is provided on the surface of one end of the fixed scroll 31, and a discharge valve 36 is provided to open and close the discharge hole 351 in predetermined cases to prevent backflow of refrigerant. .

The refrigerant is, for example, a halogenated hydrocarbon having a carbon double bond in its composition, a halogenated hydrocarbon not having a carbon double bond, a hydrocarbon, or a mixture thereof. Examples of halogenated hydrocarbons having a carbon double bond include HFC refrigerants with an ozone depletion potential of zero and fluorocarbon-based low GWP refrigerants, including tetrafluorocarbons such as HFO1234yf, HFO1234ze, and HFO1243zf, which have the chemical formula C3H2F4. Propene is an example. Examples of halogenated hydrocarbons that do not have carbon double bonds include refrigerants in which R32 (difluoromethane), R41, and the like represented by CH2F2 are mixed. Examples of hydrocarbons include propane and propylene, which are natural refrigerants. Examples of the mixture include refrigerant mixtures in which R32, R41, etc. are mixed with HFO1234yf, HFO1234ze, HFO1243zf, etc.

As shown in FIG. 2, the drive mechanism section 4 is provided on the other end side of the main frame 2 inside the shell 1. The drive mechanism section 4 includes a stator 41 and a rotor 42. The stator 41 is a stator formed by winding a winding wire through an insulating layer around an iron core formed by laminating a plurality of electromagnetic steel plates, for example, and is formed in a ring shape. The stator 41 is firmly supported inside the middle shell 11 by shrink fitting or the like. The rotor 42 is a cylindrical rotor that has a permanent magnet built into an iron core formed by laminating a plurality of electromagnetic steel plates, and has a through hole in the center that penetrates in the vertical direction. It is located in

The subframe 5 is a frame made of metal such as cast iron, and is provided on the other end side of the drive mechanism section 4 inside the shell 1 . The subframe 5 is firmly supported on the inner peripheral surface of the other end of the middle shell 11 by shrink fitting, welding, or the like. The subframe 5 includes a sub-bearing portion 51 and an oil pump 52. The sub-bearing part 51 is a ball bearing provided at one end of the central part of the sub-frame 5, and has a hole vertically penetrating in the center.
The oil pump 52 is provided on the other end side of the center portion of the subframe 5 and is arranged so that at least a portion thereof is immersed in lubricating oil stored in the oil reservoir of the shell 1. In addition, in FIG. 2, although a ball bearing is illustrated as the sub-bearing part 51, this may be a journal bearing, for example.

As shown in FIGS. 2 and 8, the crankshaft 6 is a long metal rod-shaped member and is provided inside the shell 1. As shown in FIGS. 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 that constitutes the main portion of the crankshaft 6, and is arranged so that its center axis coincides with the center axis of the middle shell 11. The rotor 42 is fixed in contact with the outer surface of the main shaft portion 61 . The eccentric shaft portion 62 is provided on one end side of the main shaft portion 61 so that its central axis is eccentric with respect to the central axis of the main shaft portion 61. The oil passage 63 is provided vertically penetrating inside the main shaft portion 61 and the eccentric shaft portion 62. In this crankshaft 6, one end side of the main shaft part 61 is inserted into the main bearing part 22 of the main frame 2, and the other end side is inserted and fixed into the sub-bearing part 51 of the sub-frame 5. As a result, the eccentric shaft portion 62 is disposed within the cylindrical portion 323 of the swinging scroll 32, and the outer circumferential surface of the rotor 42 is disposed with a predetermined gap maintained between the outer circumferential surface of the rotor 42 and the inner circumferential surface of the stator 41. Further, a first balancer 64 is provided at one end of the main shaft portion 61, and a second balancer 65 is provided at the other end to offset unbalance caused by swinging of the swinging scroll 32.

As shown in FIG. 9, the bush 7 is made of metal such as iron and is a connecting member that connects the swinging scroll 32 and the crankshaft 6. In this embodiment, the bush 7 is composed of two parts, and includes a slider 71 and a balance weight 72. The slider 71 is a cylindrical member with a flange, and is inserted into each of the eccentric shaft portion 62 and the cylindrical portion 323 . The balance weight 72 is a donut-shaped member that includes a weight portion 721 that has a substantially C-shape when viewed from one end, and is biased with respect to the center of rotation in order to offset the centrifugal force of the oscillating scroll 32. It is centrally located. The balance weight 72 is fitted, for example, to the collar of the slider 71 by a method such as shrink fitting. Note that the bush 7 may be made into one component by, for example, machining the slider 71 and the balance weight 72 into one piece.

As shown in FIGS. 1 to 3, the power supply section 8 is a power supply member that supplies power to the scroll compressor, and is formed on the outer peripheral surface of the middle shell 11 of the shell 1. The power supply unit 8 includes a cover 81, a power supply terminal 82, and wiring 83. The cover 81 is a cover member with a bottomed opening. The power supply terminals 82 are made of a metal member, and one is provided inside the cover 81 and the other is provided inside the shell 1. One side of the wiring 83 is connected to the power supply terminal 82 and the other side is connected to the stator 41.

10 is an enlarged sectional view of section X in FIG. 2, FIG. 11 is an enlarged sectional view of section A in FIG. 10, and FIG. 12 is an enlarged sectional view of section B in FIG. The middle shell 11 contacts the first substrate 311 of the fixed scroll 31 with a first protrusion 112 that protrudes radially from the first inner wall surface 111 and an end face of the first protrusion 112 facing the upper shell 12. The fixed scroll 31 has a first positioning surface 113 that determines the axial position of the fixed scroll 31. Further, the middle shell 11 has a second inner wall surface 114 that is an inner wall surface of the first protrusion 112 and a second protrusion 115 that further protrudes from the first protrusion 112 in the radial direction. Further, the middle shell 11 is an end surface of the second protrusion 115 facing the upper shell 12, and is a second positioning surface that comes into contact with the main body 21 of the main frame 2 and determines the axial position of the main frame 2. 116 and a third inner wall surface 117 which becomes the inner wall surface of the second protrusion 115. In other words, the middle shell 11 is formed in a stepped shape so that the inner diameter becomes smaller toward the other end.

Further, the first positioning surface 113 and the second positioning surface 116 are substantially perpendicular to the central axis of the crankshaft 6, and are formed such that the normal vectors of both positioning surfaces face in the same direction. A recess 1131 is provided at the corner where the first positioning surface 113 and the first inner wall surface 111 intersect, and a recess 1161 is provided at the corner where the second positioning surface 116 and the second inner wall surface 114 intersect. Thereby, the fixed scroll 31 and the main frame 2 can be brought into reliable contact with each positioning surface. Further, the axial position of the main frame 2 is determined by bringing the main body portion 21 of the main frame 2 into contact with a second positioning surface 116 formed on the middle shell 11. Further, in this state, the main frame 2 is fixed to the second inner wall surface 114 or the third inner wall surface 117 of the middle shell 11 by press fitting or shrink fitting, thereby determining the center position.
Note that if the holding force is insufficient, arc spot welding or the like may be further performed. As described above, the main frame 2 can be held in the middle shell 11 with the center position, axial height position, and phase determined.

As shown in FIGS. 2, 5, and 10, the surface of the first substrate 311 of the fixed scroll 31 on the side where the first spiral body 312 is formed is brought into contact with the first positioning surface 113 formed on the middle shell 11. , the axial position of the fixed scroll 31 is determined. Furthermore, 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 middle shell 11 by shrink fitting. As described above, the fixed scroll 31 can be held in the middle shell 11 with the center position, axial height position, and phase determined. Further, the fixed scroll 31 is provided with a function of separating high and low pressures inside the shell 1.

Next, a method of adjusting the gap between the tip of the spiral body of the fixed scroll 31 and the swinging scroll 32 and the substrate (tooth tip gap) will be explained using FIG. FIG. 13 is a diagram with dimensions added to FIG. 10. If the dimensions of each part are set as follows, the tooth tip clearance Q can be expressed by the following formula.
Distance L between the first positioning surface 113 and the second positioning surface 116
Distance between the first positioning surface 113 and the tip of the first spiral body 312 M
Thickness of the second substrate 321 of the swinging scroll 32 N
Thickness of thrust plate 24 T
Distance P between the second positioning surface 116 and the flat surface 212
Tooth tip clearance Q
Then,
L=M+Q+N+T+P,
Q=LMNTP.

Here, if the dimensions of each part are known by measurement, the targeted tooth tip clearance Q can be obtained by adjusting the thickness T of the thrust plate 24 that allows production of the greatest variety and quantity. This adjustment suppresses the refrigerant from leaking into the adjacent compression space through the gap between the tip of the spiral and the substrate, thereby reducing the loss of the compressor.

Next, an assembly method up to inserting the fixed scroll 31 into the middle shell 11 will be explained using FIGS. 14 to 19. FIG. 14 is a flowchart showing the assembly procedure up to inserting the fixed scroll 31 into the middle shell 11, which is part of the scroll compressor assembly process, and FIG. 15 is a scroll compressor showing the state in which the main frame is placed in the middle shell. FIG. 16 is a partial cross-sectional view of the machine, and is a perspective view showing the relationship between the reference plane and the main frame.
A flat surface 212 of the main frame 2 fixed to the middle shell 11 as shown in FIG. 15 is measured, and a reference surface 25 as shown in FIG. 16 is set (step S001). Specifically, a measuring instrument capable of measuring coordinate points is used, a probe of the measuring instrument is placed on the plane of the flat surface 212, and the coordinates of the measuring instrument relative to the origin are measured. A plane equation is established using the least squares method from the measured values, and this plane is set to Z=0 (the Z axis is an axis perpendicular to the X and Y axes, which will be described later). Here, the reference plane is a reference plane for the position of the hole measured in the step of setting the reference axis of the main frame and the position of the swinging scroll 32.

After setting the reference plane 25, the process advances to step S002. Note that, in FIG. 16, only the main frame 2 is shown for convenience and to explain the assembly procedure. Actually, the flat surface 212 is measured while the main frame 2 is fixed to the middle shell 11, and the reference surface 25 is set. In step S002, as shown in FIG. 16, the reference hole 26a and the reference hole 26b of the main frame 2 are measured, and the center point 27a of the reference hole 26a and the center point 27b of the reference hole 26b are calculated. That is, a measuring instrument capable of measuring coordinate points is used, and the probe of the measuring instrument is applied to the inner peripheral surface of the reference hole 26a to measure the coordinates. A circle equation is established using the least squares method from the measured values, and the coordinates of the center point 27a of this circle are calculated. Similarly, the coordinates of the center point 27b of the reference hole 26b are calculated.

Then, a straight line passing through the center point 27a and the center point 27b is set as the Y-axis 28a, the midpoint of the line segment connecting the center point 27a and the center point 27b is set as the origin 29, and the straight line passing through the origin 29 is the Y-axis. A straight line perpendicular to 28a is set as the X-axis 28b. After setting the Y-axis 28a and the X-axis 28b, the process advances to step S003. Here, the reference holes 26a and 26b in FIG. 16 are circular blind holes located along the direction in which the Oldham ring 33 moves along the first Oldham groove 215, and are located radially outward from the first Oldham groove 215. It is. FIG. 17 is a partial sectional view showing a state in which the swing scroll is arranged in the middle shell.

Next, as shown in FIG. 17, the bush 7 is inserted and installed into the eccentric shaft part 62 of the crankshaft 6, the Oldham ring 33 is installed in the Oldham housing part 214 of the main frame 2, and the thrust plate 24 is inserted into the main frame 2. The main frame 2 is installed on the flat surface 212 of the main frame 2, and the phase determining member 2121 is inserted into the first recess 2126 which is the positioning part of the main frame 2 (step S003). After installing the bush 7, Oldham ring 33, thrust plate 24, and phase determining member 2121 in the middle shell 11, the process proceeds to step S004. Note that the positioning portion is not limited to the first recess 2126, and may have any shape such as a convex portion that allows positioning of the main frame 2 and the swinging scroll 32. Here, the first recess 2126 in FIG. 17 is a circular blind hole located radially outside of the thrust plate 24 and the orbiting scroll 32.

Next, as shown in FIG. 17, the swinging scroll 32 is installed on the thrust plate 24 (step S004). After installing the swinging scroll 32 in the middle shell 11, the process proceeds to step S005. FIG. 18 is a partially enlarged sectional view showing the main frame and the swinging scroll portion of the scroll compressor. As shown in FIG. 18, the edge portion 2124 of the second phase determining member 2123 provided on the phase determining member 2121 (the boundary portion between the second phase determining member 2123 and the first phase determining member 2122 described later) is connected to the sensor 9. , for example, by a vision sensor (step S005). After detecting the edge portion 2124 with the sensor 9, the process advances to step S006.
In FIG. 18, the phase determining member 2121 is shown in a two-stage cylindrical shape. That is, the phase determining member 2121 has a two-stage cylindrical shape with a first phase determining member 2122 and a second phase determining member 2123 having different diameters. In this way, by providing not only the first phase determining member 2122 but also the second phase determining member 2123, variations due to the depth of focus can be suppressed. In this way, the phase determining member 2121 can have a plurality of phase determining members (first phase determining member 2122, second phase determining member 2123). Further, an edge portion 2124 between the first phase determining member 2122 and the second phase determining member 2123 exists on the same plane as one surface of the second substrate 321 .
It is sufficient that the edge portion 2124 that can be detected by the sensor 9 has an axial height that is approximately the same as the axial height of the second substrate 321 provided on the swinging scroll 32, and the depth of focus of the edge portion 3251 that will be described later. It is sufficient that the shape can be made into a shape other than a cylindrical shape.

Next, as shown in FIG. 18, the sensor 9 detects the edge portion 3251 of the round hole, which is the position confirmation portion 325 provided on the swinging scroll 32 (step S006). Here, the position confirmation part 325 is provided on the second substrate 321 of the swinging scroll 32, and is set at a preset distance from the first recess 2126 which is the positioning part (between the position confirmation part 325 and the first recess 2126 which is the positioning part). The fixed scroll 31 is set at a position apart from the oscillating scroll 32 by a horizontal distance between the fixed scroll 31 and the oscillating scroll 32. This distance is set so as not to interfere with the After detecting the edge portion 3251 with the sensor 9, the process advances to step S007. The arithmetic device 91 shown in FIG. 18 includes a processor 100, a storage device 101, and a determination unit 102 as hardware. The determination unit 102 calculates a distance, etc., which will be described later, based on the position of the edge portion detected by the sensor 9, and makes a determination.
Although not shown, the storage device 101 includes a volatile storage device such as a random access memory and a nonvolatile auxiliary storage device such as a flash memory. Further, although not shown, the storage device 101 may include an auxiliary storage device such as a hard disk instead of a nonvolatile auxiliary storage device.

Processor 100 executes a program input from storage device 101. Since the storage device 101 includes an auxiliary storage device and a volatile storage device, a program is input to the processor 100 from the auxiliary storage device via the volatile storage device. Further, the processor 100 may output data such as calculation results to a volatile storage device of the storage device 101, or may store the data in an auxiliary storage device via the volatile storage device.

FIG. 19 is a partially enlarged plan view of the main frame and the swinging scroll seen from one end side. Next, as shown in FIG. 19, the center point 2125 of the edge portion 2124 detected in step S005 and step S006 and the center point 3252 of the edge portion 3251 are calculated, and the distance L1 from the center point 2125 to the center point 3252 is calculated. (Step S007). That is, the edge is converted into a coordinate point of a point group, and an equation of a circle is established using the least squares method of the coordinate point and the circle. The distance L1 is calculated by calculating the center point of the circle (edge) from this circle equation and calculating the distance between the two center points.
Although FIG. 19 shows an example in which the edge portion 3251 of the position confirmation portion 325 provided on the orbiting scroll 32 is formed with a round hole, it is also possible to use a different shape such as a notch or groove, or even a different number. no problem.

Next, it is determined whether the distance L1 calculated in step S007 is within a preset threshold (step S008). When the distance L1 is greater than or equal to a preset threshold, that is, greater than the distance at which the fixed scroll 31 does not interfere with the swinging scroll 32 (when the gap between the spiral bodies of the fixed scroll 31 and the swinging scroll 32 is sufficient), step Proceed to S009. That is, when the distance L1 is equal to or greater than a preset threshold value, it is determined that the fixed scroll 31 does not interfere with the swinging scroll 32. When the distance L1 is less than the preset threshold, the process returns to step S004.

The determination method shown in FIG. 19 is realized by a processor 100 that executes a program stored in a storage device 101 or a processing circuit such as a system LSI (not shown). A plurality of processors 100 and a plurality of storage devices 101 may cooperate to execute the above functions.
Furthermore, a plurality of processing circuits may cooperate to execute the above functions. Further, the above functions may be executed in cooperation with a combination of a plurality of processors 100, a plurality of storage devices 101, and a plurality of processing circuits.

Next, the fixed scroll 31 is inserted into the middle shell 11 (step S009).
When the fixed scroll 31 is inserted into the middle shell 11, the tip of the second phase determining member 2123 is inserted into the second recess 314 (see FIG. 5) of the fixed scroll 31, thereby completing manufacturing (see FIG. 2). . In this case, the phase determining member 2121 is not finally removed, and the scroll compressor is operated with the phase determining member 2121 attached.
Further, when a convex portion is used as the positioning portion instead of the first concave portion 2126, the tip of the convex portion is inserted into the second concave portion 314.
By assembling the scroll compressor using the above assembly procedure, the assembly can be performed after determining that interference between the tips of the first spiral body 312 of the fixed scroll 31 and the second spiral body 322 of the oscillating scroll 32 can be avoided. It becomes like this. Therefore, deterioration of the parallelism and perpendicularity between the fixed scroll 31 and the oscillating scroll 32 can be suppressed, the sliding resistance during operation of the scroll compressor can be reduced, and airtight leakage between the compression chambers can be reduced. The deterioration of performance can be suppressed.

Embodiment 2.
FIG. 20 is a partially enlarged plan view of the main frame and the swinging scroll viewed from one end side. In the second embodiment, the method of measurement and calculation in step S007 shown in FIG. 14 in the first embodiment is changed. As shown in FIG. 20, by moving a contact sensor such as a touch sensor or a non-contact sensor such as a laser displacement sensor as the sensor 9 to scan in the Sc direction, the edges 2124 and 3251 can be separated. The distance between each edge is detected, and the amount of movement L2 of the sensor 9 at that time is calculated. Accordingly, the distance from center point 2125 to center point 3252 is calculated. The other assembly methods are the same as in the first embodiment, and the same effects as in the first embodiment can be obtained.

Embodiment 3.
21 and 22 are partially enlarged plan views of the main frame and the swinging scroll according to the third embodiment, viewed from one end side. The present embodiment relates to the preset threshold value in step S007 shown in FIG. 14 in the first embodiment. In FIG. 21, the range indicated by the diagonal line H1 is the movable range of the center point 3252 of the edge portion 3251 in the position confirmation portion 325. Further, the range indicated by the diagonal line H2 is the movable range of the center point 2125 of the edge portion 2124 in the positioning portion. Further, in the range indicated by the diagonal line H1, the direction indicated by the arrow P is defined as the circumferential direction. At the design stage, the first recess 2126, which is a positioning part, is designed so that the center point 2125 is located within the movable range H2. Further, the position confirmation section 325 is designed so that the center point 3252 is located within the movable range H1. As shown in FIG. 21, the first concave portion 2126, which is the positioning portion of the main frame 2, has a movable range H2 that can maintain a threshold value with respect to a movable range H1 in which the position confirmation portion 325 of the swinging scroll 32 is displaced. placed within.

The position confirmation section 325 of the swinging scroll 32 has a horizontal distance between the first concave section 2126 and the position confirmation section 325 (that is, the middle shell 11 (distance in the direction perpendicular to the second inner wall surface 114). Therefore, the range P in the circumferential direction shown in FIG. 21 is a range determined so that the fixed scroll 31 does not interfere with the swinging scroll 32. In FIG. 21, if the center point 3252 exists within the range P in the circumferential direction, the fixed scroll 31 does not interfere with the swinging scroll 32.
However, the first recess 2126, which is the positioning part of the main frame 2, may be arranged outside the circumferential direction P range in which the position confirmation part 325 of the swinging scroll 32 is displaced. For example, if the phase of the first recess 2126, which is the positioning part of the main frame 2, and the phase of the gap formed between the crankshaft 6 and the slider 71 are made to match, the first recess 2126 can be formed in the same manner as in the first embodiment. Even if the position is 180° with respect to the indicated position, a preset threshold can be set, and by determining whether the threshold is greater than or equal to the threshold, it is possible to determine whether or not there will be interference. For example, as shown in FIG. 22, even if the center point of the edge portion 2124 is arranged at a position 180° symmetrical with respect to the central axis with respect to the center point 2125 of the edge portion 2124 shown in FIG. A preset threshold value can be provided.
The other assembly methods are the same as in the first embodiment, and the same effect as in the first embodiment can be obtained, as well as rapid sensing with the same sensor.

Although this application describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments may be applicable to a particular embodiment. The present invention is not limited to, and can be applied to the embodiments alone or in various combinations.
Therefore, countless variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, this includes cases in which at least one component is modified, added, or omitted, and cases in which at least one component is extracted and combined with components in other embodiments.

1 shell, 2 main frame, 212 flat surface, 2121 phase determining member, 2122 first phase determining member, 2123 second phase determining member, 2124 edge portion, 2126 first recessed portion, 215 first Oldham groove, 31 fixed scroll, 312 1st spiral body, 32 Oscillating scroll, 321 2nd substrate, 322 2nd spiral body, 324 2nd Oldham groove, 325 Position confirmation part, 33 Oldham ring, 332 1st key part, 333 2nd key part, 34 Compression Chamber, 9 sensors.

Claims (8)

a fixed scroll having a first spiral; an oscillating scroll having a second volute which forms a compression chamber by being engaged with the first volute; and a pair of second volutes provided on the oscillating scroll. an Oldham ring provided with a second key portion accommodated in the Oldham groove; a main frame provided with a pair of first Oldham grooves for accommodating a pair of first key portions provided in the Oldham ring; A scroll compressor comprising a shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside,
A positioning part is provided on the flat surface of the main frame, and a position confirmation part is provided on the second substrate of the oscillating scroll and is spaced from the positioning part by a predetermined distance in the horizontal direction, and the distance is a distance at which the fixed scroll does not interfere with the swinging scroll;
The positioning portion is a first recess provided in a flat surface of the main frame,
providing a phase determining member inserted into the first recess ;
When the fixed scroll is viewed in the axial direction perpendicular to the horizontal direction and from the fixed scroll toward the swinging scroll, a portion of the fixed scroll that overlaps with the position confirmation section in the horizontal direction includes: A scroll compressor in which there is no passage connecting the compression chamber and a space located on the opposite side of the compression chamber across the fixed scroll . The scroll compressor according to claim 1, wherein a tip of the phase determining member is inserted into a second recess of the fixed scroll. a fixed scroll having a first spiral; an oscillating scroll having a second volute which forms a compression chamber by being engaged with the first volute; and a pair of second volutes provided on the oscillating scroll. an Oldham ring provided with a second key portion accommodated in the Oldham groove; a main frame provided with a pair of first Oldham grooves for accommodating a pair of first key portions provided in the Oldham ring; A scroll compressor comprising a shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside,
A positioning part is provided on the flat surface of the main frame, and a position confirmation part is provided on the second substrate of the oscillating scroll and is spaced from the positioning part by a predetermined distance in the horizontal direction, and the distance is a distance at which the fixed scroll does not interfere with the swinging scroll;
The positioning portion is a first recess provided in a flat surface of the main frame,
providing a phase determining member inserted into the first recess;
A scroll compressor in which the phase determining member includes a first phase determining member and a second phase determining member having different diameters. The scroll compressor according to claim 3, wherein an edge portion between the first phasing member and the second phasing member is on the same plane as a surface on the second substrate . a fixed scroll having a first spiral; an oscillating scroll having a second volute which forms a compression chamber by being engaged with the first volute; and a pair of second volutes provided on the oscillating scroll. an Oldham ring provided with a second key portion accommodated in the Oldham groove; a main frame provided with a pair of first Oldham grooves for accommodating a pair of first key portions provided in the Oldham ring; A scroll compressor comprising a shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside,
A positioning part is provided on the flat surface of the main frame, and a position confirmation part is provided on the second substrate of the oscillating scroll and is spaced from the positioning part by a predetermined distance in the horizontal direction, and the distance is a distance at which the fixed scroll does not interfere with the swinging scroll;
The positioning portion is a convex portion provided on the flat surface of the main frame,
A tip of the convex portion is inserted into a second recess of the fixed scroll ,
When the fixed scroll is viewed from the fixed scroll toward the swinging scroll in an axial direction perpendicular to the horizontal direction, a portion of the fixed scroll that overlaps with the position confirmation portion in the horizontal direction is a scroll compressor in which there is no passage connecting the compression chamber and a space located on the opposite side of the fixed scroll with respect to the compression chamber . Any one of claims 1 to 5, wherein the positioning section of the main frame is arranged within a range that is separated by a preset threshold distance from a movable range in which the position confirmation section of the swinging scroll shifts. Scroll compressor described in section. a fixed scroll having a first spiral; an oscillating scroll having a second volute which forms a compression chamber by being engaged with the first volute; and a pair of second volutes provided on the oscillating scroll. an Oldham ring provided with a second key portion accommodated in the Oldham groove; a main frame provided with a pair of first Oldham grooves for accommodating a pair of first key portions provided in the Oldham ring; A scroll compressor comprising a shell that accommodates the fixed scroll, the swinging scroll, and the main frame inside,
A positioning part is provided on the flat surface of the main frame, and a position confirmation part is provided on the second substrate of the oscillating scroll and is spaced from the positioning part by a predetermined distance in the horizontal direction, and the distance is A method for assembling a scroll compressor in which the fixed scroll is at a distance that does not interfere with the oscillating scroll,
Detecting the positioning section and the position confirmation section with a sensor and calculating a horizontal distance between the positioning section and the position confirmation section;
A method for assembling a scroll compressor, comprising the step of inserting the fixed scroll into the shell when the distance in the horizontal direction between the positioning section and the position confirmation section is greater than or equal to a preset threshold. 8. A non-contact sensor is used as the sensor, and the distance in the horizontal direction between the positioning section and the position confirmation section is calculated by calculating the amount of movement of the non-contact sensor. How to assemble a scroll compressor.

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