JP4750551B2 - Method for manufacturing two-cylinder rotary hermetic compressor - Google Patents

Description

  The present invention relates to a two-cylinder rotary hermetic compressor for compressing refrigerant gas, which is used in a refrigerating and air-conditioning apparatus such as an air conditioner or a refrigerator, and particularly relates to a method for fastening a compression mechanism.

  The fastening structure of the compression mechanism part in the conventional two-cylinder rotary hermetic compressor does not use bolts used for fastening the cylinder and the bearing, and is used for fastening the upper cylinder, the lower cylinder and the intermediate partition plate outside the bearing. A method is known in which each cylinder and an intermediate partition plate are fastened using a dedicated bolt (see, for example, Patent Document 1).

In addition, a method is known in which the upper and lower bearings and the cylinder are respectively fastened and the intermediate partition plate and the intermediate partition plate are passed from the lower cylinder side and fastened to the threaded portion of the upper cylinder only by bolts (for example, see Patent Document 2). .
JP-A-6-159277 JP 63-297791 A

  The compression mechanism part of a conventional two-cylinder rotary hermetic compressor has a distortion and deformation of the inner diameter polishing part and flat polishing part of the cylinder that occur when the upper and lower cylinders are fastened, resulting in higher leakage loss and sliding loss. There was a problem that the compression efficiency was lowered.

  In addition, as in Patent Document 1, in the case of fastening the upper and lower cylinders and the intermediate partition plate using a dedicated bolt, the number of bolts is large. There was a problem in terms of price.

  The present invention has been made to solve the above-described problems, and reduces distortion deformation of each part caused by bolt fastening at the time of assembling the compression mechanism part, resulting in high compression efficiency and high efficiency. It is an object of the present invention to provide an inexpensive two-cylinder rotary hermetic compressor and a manufacturing method thereof by simplifying the fastening structure.

  A two-cylinder rotary hermetic compressor according to the present invention includes a hermetic container, an electric element housed in an upper part of the hermetic container, a lower part in the hermetic container, an upper bearing, an upper cylinder, A compression mechanism having a partition plate, a lower cylinder, and a lower bearing and driven by an electric element via a crankshaft, and an upper bearing, an upper cylinder, and an intermediate partition plate from the upper bearing side to the lower cylinder. An upper through-bolt to be fixed with screws, and a lower through-bolt to fix the lower bearing, lower cylinder, and intermediate partition plate to the upper cylinder with screws from the lower bearing side, and an upper through-bolt and a lower through-bolt Are arranged alternately in the circumferential direction which is the rotation direction of the crankshaft.

  In the two-cylinder rotary hermetic compressor according to the present invention, with the above configuration, distortion deformation of each part of the compression mechanism portion due to fastening of the upper through bolt and the lower through bolt is reduced, and each cylinder, each bearing, and each Since the leakage loss from the gap between the thrust surface of the cylinder and the intermediate partition plate can be reduced, a high-efficiency and high-efficiency two-cylinder rotary hermetic compressor is achieved by simplifying the fastening structure of the compression mechanism assembly. Obtainable.

Embodiment 1 FIG.
1 to 15 show the first embodiment. FIG. 1 is a longitudinal sectional view of a two-cylinder rotary hermetic compressor 1000. FIG. 2 shows a compression mechanism 30 of the two-cylinder rotary hermetic compressor 1000. 3 is an exploded perspective view, FIG. 3 is a plan view in which an upper bearing 9 is fixed to the upper cylinder 5 with upper bearing fastening bolts 13, FIG. 4 is a cross-sectional view taken along line AA in FIG. FIG. 6 is a cross-sectional view taken along the line BB of FIG. 5, FIG. 7 is a cross-sectional view of the compression mechanism portion in which the upper cylinder 5 is assembled, and the lower cylinder 6 and the lower bearing 10 are not mounted. 8 is a plan view showing a state immediately before the lower cylinder 6 and the lower bearing 10 are attached, and the lower bearing 10, the lower cylinder 6 and the intermediate partition plate 4 are fastened to the upper cylinder 5 with the lower through-bolts 16. FIG. 8 is a cross-sectional view taken along the line C-C in FIG. 8, and FIG. FIG. 11 is a cross-sectional view taken along the line DD in FIG. 10, and FIG. 12 is a plan view showing a state immediately before the receiver 9, the upper cylinder 5 and the intermediate partition plate 4 are fastened to the lower cylinder 6, and a state where the lower bearing fastening bolt 14 is removed. The top view which shows the state which fastened the lower discharge muffler 12 and the lower bearing 10 to the lower cylinder 6 with the lower bearing fastening bolt 14, FIG. 13 is EE sectional drawing of FIG. 12, FIG. 14, FIG. It is a flowchart which shows a procedure.

  As shown in FIG. 1, in the two-cylinder rotary hermetic compressor 1000, an electric element 2 serving as a drive source is housed in an upper part of the hermetic container 1. The electric element 2 is connected to the compression mechanism unit 30 located in the lower part of the sealed container 1 by the crankshaft 3 and drives the compression mechanism unit 30. The compression mechanism 30 is a two-cylinder cylinder having an upper cylinder 5 and a lower cylinder 6.

  The upper cylinder 5 is engaged with the upper eccentric portion 3a of the crankshaft 3 and rotates in the upper cylinder 5 along the inner peripheral surface thereof, and reciprocates in contact with the upper rolling piston 7a. The upper vane 8a (see FIG. 2) is accommodated, and the upper bearing 9 is combined with the upper end surface in the axial direction, and the intermediate partition plate 4 is combined with the lower end surface, thereby closing both axial openings.

  The upper bearing 9 is fastened by a top bearing fastening bolt 13 to a threaded portion 5 a provided in the upper cylinder 5. Further, the upper discharge muffler 11, the upper bearing 9, the upper cylinder 5, and the intermediate partition plate 4 are fastened to the threaded portion 6 a provided on the lower cylinder of the lower cylinder 6 with the upper through bolts 15. At this time, the upper through-bolt 15 passes through a drill hole 5 b provided in the upper cylinder of the upper cylinder 5.

  The lower cylinder 6 is in contact with the lower rolling piston 7b that fits into the lower eccentric portion 3b of the crankshaft 3 and rotates along the inner peripheral surface of the lower cylinder 6, and the lower rolling piston 7b. The reciprocating lower vane 8b (see FIG. 2) is housed, and the lower bearing 10 is combined with the lower end surface in the axial direction, and the intermediate partition plate 4 is combined with the upper end surface, thereby closing both axial openings.

  The lower discharge muffler 12 and the lower bearing 10 are fastened by a lower bearing fastening bolt 14 to a threaded portion 6 a provided in the lower cylinder of the lower cylinder 6. Further, the lower bearing 10, the lower cylinder 6, and the intermediate partition plate 4 are fastened to a threaded portion 5 a provided on the upper cylinder 5 by a lower through bolt 16. At this time, the lower through-bolt 16 passes through a drill hole 6 b provided in the lower cylinder of the lower cylinder 6.

  A discharge pipe 17 is provided on the top of the sealed container 1. High-pressure refrigerant gas discharged from the upper discharge muffler 11 and lower discharge muffler 12 and cooling the electric element 2 is sent from the discharge pipe 17 to a refrigerant circuit (not shown).

  On the suction side, an accumulator 18 for storing the refrigerant from the refrigerant circuit is provided. A suction connecting pipe 19a and a suction connecting pipe 19b for sending a low-pressure refrigerant gas from the accumulator 18 to the upper cylinder 5 and the lower cylinder 6 are sucked into the upper cylinder 5 and the lower cylinder 6 through the outer pipe 20a and the outer pipe 20b. Connected to the mouth. The inner pipe 21a and the inner pipe 21b are press-fitted into the outer pipe 20a and the outer pipe 20b so as to fill a gap between the outer pipe 20a and the outer pipe 20b and the suction ports of the upper cylinder 5 and the lower cylinder 6.

  FIG. 2 is an exploded perspective view showing the main part of the compression mechanism section 30. The upper vane 8a and the lower vane 8b are not shown in FIG. As already described with reference to FIG. 1, the upper rolling piston 7a is housed in the upper bearing 9, the upper cylinder 5, and the upper cylinder 5 that are fitted to the crankshaft 3 from above, and is fitted to the upper eccentric portion 3a of the crankshaft 3. The lower vane piston 7b, the lower vane 8b, and the lower cylinder 6 that are housed in the upper vane 8a, the intermediate partition plate 4, and the lower cylinder 6 and fit into the lower eccentric portion 3b (not shown) of the crankshaft 3. The lower bearing 10 is a main component.

  A procedure for assembling the compression mechanism 30 of the two-cylinder rotary hermetic compressor configured as described above (an example of a method for manufacturing a two-cylinder rotary hermetic compressor) will be described below.

  First, as shown in FIGS. 3 and 4, the upper cylinder 5 and the upper bearing 9 are fixed to a threaded portion 5 a provided in the upper cylinder by using three upper bearing fastening bolts 13. At this time, assembly is performed so that the inner diameter of the upper bearing 9 and the inner diameter of the upper cylinder 5 are concentric (S10 in FIG. 14). Most preferably, the threaded portions 5a provided in the upper cylinder are arranged at an equal pitch on the same circumference with respect to the axial center. However, the arrangement is not limited to this, and any arrangement close thereto may be used. Moreover, the drill hole part 5b provided in the upper cylinder is provided in three places between the threading parts 5a provided in the upper cylinder. Therefore, the threaded portion 5a provided in the upper cylinder and the drill hole portion 5b provided in the upper cylinder are alternately arranged at six locations in the circumferential direction that is the rotational direction of the crankshaft 3 in total. . In FIG. 3, the vicinity of the discharge port through which the compressed refrigerant gas is discharged is also shown, but in this embodiment, it is not particularly mentioned because it is not particularly relevant.

  Next, as shown in FIGS. 5 and 6, the lower cylinder 6 and the lower bearing 10 are fixed to a threaded portion 6 a provided in the lower cylinder using three lower bearing fastening bolts 14. At this time, assembly is performed so that the inner diameter of the lower bearing 10 and the inner diameter of the lower cylinder 6 are concentric (S20 in FIG. 14). Most preferably, the threaded portions 6a provided in the lower cylinder are arranged at an equal pitch on the same circumference with respect to the axis center. However, the arrangement is not limited to this, and any arrangement close thereto may be used. Moreover, the drill hole part 6b provided in the lower cylinder is provided in three places between the threading parts 6a provided in the lower cylinder. Accordingly, the threaded portion 6a provided in the lower cylinder and the drill hole portion 6b provided in the lower cylinder are alternately arranged in six locations in the circumferential direction that is the rotational direction of the crankshaft 3 in total. . In FIG. 5, the vicinity of the discharge port through which the compressed refrigerant gas is discharged is also shown, but in this embodiment, it is not particularly related because it is not related.

  Next, as shown in FIG. 7, the upper rolling piston 7a and the upper vane 8a (not shown) are inserted into the upper cylinder 5, the crankshaft 3 is inserted into the inner diameter portion of the upper bearing 9, and the crankshaft 3 is attached to the inner diameter portion of the upper rolling piston 7a (S30 in FIG. 14).

  Then, the crankshaft 3 is passed through the inner diameter portion of the intermediate partition plate 4 and is adjusted to a predetermined position so that the axial vertical plane of the intermediate partition plate 4 and the axial vertical plane of the upper cylinder 5 are in close contact with each other. Further, the lower rolling piston 7b is mounted on the lower eccentric portion 3b of the crankshaft 3 (S40 in FIG. 14).

  Next, as shown in FIGS. 8 and 9, the assembly of the lower cylinder 6 and the lower bearing 10 into which the lower vane 8b (not shown) is inserted (the one shown in FIGS. 5 and 6) is combined to form the lower bearing 10 The inner diameter portion of the crankshaft 3 is inserted into the inner diameter portion of the lower cylinder 6, and the plane perpendicular to the axis of the lower cylinder 6 and the plane perpendicular to the axis of the intermediate partition plate 4 are brought into close contact with each other (S50 in FIG. 14).

  Therefore, in order to fasten the lower bearing 10, the lower cylinder 6, the intermediate partition plate 4, and the upper cylinder 5, three lower through bolts 16 are provided in the upper cylinder through the hole 6b provided in the lower cylinder. The threaded portion 5a is fixed. At this time, in order to obtain a concentricity between the inner diameter portion of the upper bearing 9 and the inner diameter portion of the lower bearing 10, the crankshaft 3 is assembled while rotating and fixed with the lower through-bolt 16 (S60 in FIG. 15). The threaded portion 5a provided in the upper cylinder and the drill hole 6b provided in the lower cylinder are arranged such that the lower through-bolt 16 passes through the drill hole 6b provided in the lower cylinder in the axial direction and passes through the upper cylinder. The concentric positional relationship is such that it is fastened to the provided threaded portion 5a.

  Further, the threaded portion 6 a provided in the lower cylinder to which the lower bearing fastening bolt 14 is fastened and the drill hole portion 6 b provided in the lower cylinder are alternately arranged in the circumferential direction which is the rotation direction of the crankshaft 3. Has been. And the threaded part 6a provided in the lower cylinder and the drill hole part 5b provided in the upper cylinder are concentric.

  Next, as shown in FIGS. 10 and 11, the upper discharge muffler 11 is attached to the outer peripheral portion of the upper bearing 9 by, for example, press-fitting or the like, and the upper discharge muffler 11, the upper bearing 9, the upper cylinder 5, the intermediate partition plate 4, In order to fasten the lower cylinder 6, the upper through-bolt 15 is passed through the drill hole 5b provided in the upper cylinder and fastened and fixed to the threaded portion 6a provided in the lower cylinder (S70 in FIG. 15). The three upper through-bolts 15 and the lower through-bolts 16 are alternately arranged in the circumferential direction that is the rotation direction of the crankshaft 3. Most preferably, they are arranged at equal pitches on the same circumference. However, any arrangement close to that may be used.

  Thereafter, the lower bearing fastening bolt 14 that has fastened the lower cylinder 6 and the lower bearing 10 is temporarily removed. This is because the lower discharge muffler 12 is fixed by the lower bearing fastening bolt 14. As shown in FIGS. 12 and 13, once the lower bearing fastening bolt 14 is removed, the lower discharge muffler 12 is attached to the outer peripheral portion of the lower bearing 10 by, for example, press fitting, and the lower discharge muffler 12 is again inserted by the lower bearing fastening bolt 14. The lower bearing 10 and the lower cylinder 6 are fastened (S80 in FIG. 15).

  As described above, the compression mechanism sections 30 are alternately arranged by the same number (three in this embodiment) of the upper through-bolts 15 and the lower through-bolts 16 on the same circumference as the rotation direction of the crankshaft 3. By fastening at a pitch, a uniform force acts on the thrust surface of each component. Therefore, the upper bearing 9 and the lower bearing 10 are used to fasten the conventional upper cylinder 5, lower cylinder 6 and intermediate partition plate 4. On the outside, the upper cylinder 5 and the intermediate partition plate 4 and the lower cylinder 6 and the intermediate partition plate 4 are respectively fastened using dedicated bolts, or the upper bearing 9 and the upper cylinder 5 and the lower bearing 10 and the lower cylinder 6 are The upper cylinder 5 generated at the time of fastening is compared with a method of fastening them respectively and fastening them and the intermediate partition plate 4 from the lower cylinder 6 side to the threaded portion 5a provided on the upper cylinder only by the lower through-bolt 16. And Since the strain deformation of the surface grinding portion and the inner diameter grinding of the lower cylinder 6 is reduced, high assembly accuracy can be leakage loss and sliding loss is low, to obtain a high efficiency compressor. The upper through-bolts 15 and the lower through-bolts 16 may be arranged alternately in the circumferential direction that is the rotation direction of the crankshaft 3. The number of the upper through bolts 15 and the lower through bolts 16 may be at least two each.

  Further, by reducing the circumferential pitch between the upper through-bolt 15 and the lower through-bolt 16 that fasten the compression mechanism 30, the planar polishing portions of the upper cylinder 5 and the lower cylinder 6 can be set narrow, and the intermediate partition Since the plate 4 can be reduced in size, a low-cost two-cylinder rotary hermetic compressor 1000 can be obtained by reducing material costs and processing costs.

Embodiment 2. FIG.
FIG. 16 shows the second embodiment and is a longitudinal sectional view of a two-cylinder rotary hermetic compressor 2000. FIG.
As shown in FIG. 16, in the two-cylinder rotary hermetic compressor 2000 of the present embodiment, one intake connecting pipe 19 from the accumulator 18 is connected to the intake port of the upper cylinder 5 or the lower cylinder 6. In the example of FIG. 16, the suction connecting pipe 19 is connected to the suction port of the upper cylinder 5.

  The assembly order of the compression mechanism unit 30 is the same as that of the first embodiment. In the assembly of the two-cylinder rotary hermetic compressor 2000, after the compression mechanism 30 and the electric element 2 are inserted into the sealed container 1, the outer pipe 20 is inserted into the suction port of the upper cylinder 5, and the inner pipe is inserted therein. 21 is press-fitted. Thereafter, the suction connecting pipe 19 from the accumulator 18 is inserted into the outer pipe 20 and brazed. The suction port of the lower cylinder 6 communicates with the suction connection pipe 19 through the suction connection hole 40.

  Due to the heating when the suction connecting pipe 19 from the accumulator 18 is inserted into the outer pipe 20 and brazed, the inner diameter polishing portion, the flat polishing portion and the like of the upper cylinder 5 and the lower cylinder 6 are distorted and deformed, thereby causing leakage loss and sliding loss. May increase and the compression efficiency may decrease.

  Further, the two-cylinder rotary hermetic compressor 1000 (Embodiment 1) having the suction connection pipes in both the upper cylinder 5 and the lower cylinder 6 has the suction connection pipe 19a and the suction connection pipe 19b during the compressor operation. Since the pressure pulsation of the refrigerant increases, the compression efficiency may decrease.

  Furthermore, if the impact when the inner pipe 21 is press-fitted exceeds the shearing force of each bolt fixing the compression mechanism 30, the concentricity between the inner diameter of the upper bearing 9 and the inner diameter of the lower bearing 10 is shifted, and reliability is reduced. There is a fear.

  Therefore, in the two-cylinder rotary hermetic compressor 2000 having one suction connecting pipe 19 as shown in FIG. 16, the accumulator 18 is compared with the two-cylinder rotary hermetic compressor having two suction cylinders 19. Since the number of locations where the suction connecting pipe 19 is brazed is one, the amount of heat input to the compression mechanism portion 30 is reduced, and distortion deformation of the inner diameter polishing portion and the plane polishing portion of the upper cylinder 5 and the lower cylinder 6 is reduced. Since the leakage loss and sliding loss are reduced, a highly efficient two-cylinder rotary hermetic compressor 2000 can be obtained.

  Further, in the two-cylinder rotary hermetic compressor 2000 having one suction connection pipe, the refrigerant flow path is branched before the cylinder suction port of each of the upper cylinder 5 and the lower cylinder 6, so that the suction connection pipe is Compared with the two two-cylinder rotary hermetic compressor 1000, the pressure loss is reduced, and the efficiency can be further increased.

  Further, in the two-cylinder rotary type hermetic compressor 2000 having one suction connecting pipe, the inner pipe 21 is press-fitted at one place, so that the inner diameter of the upper bearing 9 and the inner diameter of the lower bearing 10 due to the inner pipe 21 are press-fitted. The influence on the concentricity is reduced, and the reliability can be further improved.

  The two-cylinder rotary hermetic compressor 2000 with one suction connection pipe has a smaller number of parts than the two-cylinder rotary hermetic compressor 1000 with two suction connection pipes, so that the low-cost two-cylinder A rotary hermetic compressor 2000 can be obtained.

Embodiment 3 FIG.
FIGS. 17 and 18 are diagrams showing the third embodiment, and are cross-sectional views of the main part of the compression mechanism 30. FIG.
As shown in the first and second embodiments, the roundness deteriorates due to the deformation of the inner diameter polished portions of the upper cylinder 5 and the lower cylinder 6 due to the fastening of the compression mechanism 30 by each bolt. Leakage loss and sliding loss may increase.

  Therefore, in order to reduce distortion deformation to the inner diameter polishing portion, the threaded portion 5a and the lower cylinder provided in the upper cylinder of the two-cylinder hermetic rotary compressor shown in the first and second embodiments are provided. A relief portion is provided on the end face of the provided threaded portion 6a.

  As shown in FIG. 17, when the upper cylinder 5 and the upper bearing 9 are fixed using the upper bearing fastening bolt 13 via the threaded portion 5 a provided in the upper cylinder, the inner diameter polished portion of the upper cylinder 5 is indicated by a broken line. Deforms as shown.

  Therefore, as shown in FIG. 18, on the side of each flat polishing portion of the threaded portion 5a provided in the upper cylinder, a cylindrical shape is provided on the end surface of the threaded portion of the upper cylinder over a certain depth. By providing the relief portion 5c and the relief portion 5d provided on the end face of the threaded portion of the upper cylinder, distortion deformation of the inner diameter polishing portion at the time of bolt fastening can be suppressed.

  Thereby, the roundness of the inner diameter polished portion of the cylinder generated when the compression mechanism portion 30 is fastened by each bolt is improved, and a highly efficient compressor with high assembly accuracy, low leakage loss and sliding loss can be obtained. .

  In FIG. 18, the upper cylinder 5, the upper bearing 9, and the upper bearing fastening bolt 13 are shown as examples, but the lower cylinder 6, the lower bearing 10, and the lower bearing fastening bolt 14 are fixed to the lower cylinder in the same manner as described above. A similar effect can be obtained by providing the same relief portion on the end face of the provided threaded portion 6a.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Embodiment 1, and is a longitudinal cross-sectional view of a 2-cylinder rotary type hermetic compressor. FIG. 3 is a diagram showing the first embodiment and is an exploded perspective view showing a compression mechanism portion 30 of a two-cylinder rotary hermetic compressor. FIG. 5 is a diagram showing the first embodiment, and is a plan view in which an upper bearing 9 is fixed to an upper cylinder 5 with upper bearing fastening bolts 13. It is a figure which shows Embodiment 1 and is AA sectional drawing of FIG. FIG. 4 is a diagram showing the first embodiment, and is a plan view in which a lower bearing 10 is fixed to a lower cylinder 6 with lower bearing fastening bolts 14. It is a figure which shows Embodiment 1, and is BB sectional drawing of FIG. FIG. 3 is a diagram showing the first embodiment, and is a cross-sectional view of a compression mechanism portion in which an upper cylinder 5 portion is assembled and a lower cylinder 6 and a lower bearing 10 are not attached. FIG. 5 is a diagram illustrating the first embodiment, and shows a state immediately before the lower cylinder 6 and the lower bearing 10 are attached and the lower bearing 10, the lower cylinder 6, and the intermediate partition plate 4 are fastened to the upper cylinder 5 with the lower through-bolts 16. FIG. It is a figure which shows Embodiment 1, and is CC sectional drawing of FIG. In the figure which shows Embodiment 1, the upper discharge bolt 11, the upper bearing 9, the upper cylinder 5, and the intermediate partition plate 4 are just fastened to the lower cylinder 6 with the upper through bolt 15, and the lower bearing fastening bolt 14 is removed. It is a top view which shows a state. It is a figure which shows Embodiment 1, and is DD sectional drawing of FIG. FIG. 2 is a diagram showing the first embodiment, and is a plan view showing a state in which a lower discharge muffler 12 and a lower bearing 10 are fastened to a lower cylinder 6 with lower bearing fastening bolts 14. It is a figure which shows Embodiment 1, and is EE sectional drawing of FIG. FIG. 5 is a diagram showing the first embodiment and is a flowchart showing an assembling procedure of the compression mechanism section. FIG. 5 is a diagram showing the first embodiment and is a flowchart showing an assembling procedure of the compression mechanism section. It is a figure which shows Embodiment 2, and is a longitudinal cross-sectional view of a 2-cylinder rotary sealed compressor. FIG. 6 is a diagram showing a third embodiment, and is a cross-sectional view of a main part of a compression mechanism unit 30. FIG. FIG. 6 is a diagram showing a third embodiment, and is a cross-sectional view of a main part of a compression mechanism unit 30. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Airtight container, 2 Electric element, 3 Crankshaft, 3a Upper eccentric part, 3b Lower eccentric part, 4 Intermediate partition plate, 5 Upper cylinder, 5a Threaded part provided in upper cylinder, 5b Provided in upper cylinder Drill hole, 5c Relief provided on the end face of the threaded part of the upper cylinder, 5d Relief provided on the end face of the threaded part of the upper cylinder, 6 Lower cylinder, 6a Threaded part provided on the lower cylinder 6b Drill hole provided in the lower cylinder, 7a Upper rolling piston, 7b Lower rolling piston, 8a Upper vane, 8b Lower vane, 9 Upper bearing, 10 Lower bearing, 11 Upper discharge muffler, 12 Lower discharge muffler, 13 Upper bearing fastening bolt, 14 Lower bearing fastening bolt, 15 Upper through bolt, 16 Lower through bolt, 17 Discharge pipe, 18 Accum 19 suction connection pipe, 19a suction connection pipe, 19b suction connection pipe, 20 outer pipe, 20a outer pipe, 20b outer pipe, 21 inner pipe, 21a inner pipe, 21b inner pipe, 30 compression mechanism part, 40 suction connection Hole, 1000 2-cylinder rotary hermetic compressor, 2000 2-cylinder rotary hermetic compressor.

Claims (3)

In a method of manufacturing a two-cylinder rotary hermetic compressor having an upper cylinder and a lower cylinder,
Fix the upper bearing to the upper cylinder using the upper bearing fastening bolt,
Fix the lower bearing to the lower cylinder using lower bearing fastening bolts,
Insert the upper rolling piston and the upper vane inside the upper cylinder, insert the crankshaft into the upper bearing inner diameter part, and attach the upper eccentric part of the crankshaft to the inner diameter part of the upper rolling piston,
The crankshaft is passed through the inner diameter portion of the intermediate partition plate, and is aligned with a predetermined position so that the axial vertical plane of the intermediate partition plate and the axial vertical plane of the upper cylinder are in close contact with each other. Attach the lower rolling piston to the eccentric part,
Combined with the lower cylinder inserting the lower vane the assembly of the lower bearing, the crankshaft preparative inserted into the inside diameter portion of the lower bearing, the axis of the intermediate partition plate and the axial vertical plane of the lower cylinder Adhere the vertical plane,
Fasten the lower bearing, the lower cylinder, and the intermediate partition plate to the upper cylinder with lower through-bolts,
An upper discharge muffler is mounted on the outer periphery of the upper bearing, and the upper discharge muffler, the upper bearing, the upper cylinder, and the intermediate partition plate are fastened to the lower cylinder with upper through bolts,
The lower bearing fastening bolt that has fastened the lower cylinder and the lower bearing is temporarily removed, and a lower discharge muffler is attached to the outer periphery of the lower bearing, and the lower discharge muffler, the lower bearing, Fasten the lower cylinder,
A method of manufacturing a two-cylinder rotary hermetic compressor, wherein at least two of the upper through-bolts and the lower through-bolts are alternately arranged in the circumferential direction that is the rotation direction of the crankshaft. The two-cylinder rotary hermetic compressor includes an accumulator that stores refrigerant from a refrigerant circuit, and a suction connection pipe that connects the accumulator to the upper cylinder or the lower cylinder. A method for producing a 2-cylinder rotary hermetic compressor according to claim 1. The two-cylinder rotary hermetic compressor includes a threaded portion provided in the lower cylinder for fixing the upper through-bolt with screws, and a screw provided in the upper cylinder for fixing the lower through-bolt with screws. 2. The method of manufacturing a two-cylinder rotary hermetic compressor according to claim 1, wherein the cut portion is provided with a relief portion having a predetermined shape in the vicinity of both end faces orthogonal to the axial direction of each cylinder.

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