JPWO2017199438A1 - Compressor, compressor manufacturing method, and tube expansion device - Google Patents

Abstract

  The compressor has a cylindrical body part, a bottom part joined to one end of the body part, and a lid part joined to the other end of the body part, and includes a compression mechanism part, a crankshaft, and an electric motor part. A pressure-tight container with a compression mechanism part and an electric motor part fixed to the body part, and a first inner side surface on the body part by a first tube forming performed before the bottom part is joined to the body part; After the second inner surface having a smaller inner diameter than the first inner surface and the third inner surface extending between the first inner surface and the second inner surface are formed, the bottom portion is joined to the body portion. The second inner surface and the third inner surface are expanded to the inner diameter of the first inner surface by the second tube expansion. Moreover, the manufacturing method of a compressor is for manufacturing the above-mentioned compressor. Moreover, a pipe expansion instrument is for manufacturing the above-mentioned pressure sealed container.

Description

  The present invention relates to a compressor including a pressure-sealed container in which a body part, a bottom part, and a lid part are joined by welding, a method for manufacturing the compressor, and a tube expansion device used for manufacturing the pressure-sealed container.

  As a conventional compressor including a pressure-sealed container in which a body part, a bottom part, and a lid part are joined by welding, for example, in Patent Document 1, a cylindrical case and a lid body are fitted together, and a contact portion is sealed by welding. What is provided with a closed sealed container is disclosed.

Japanese Patent Laid-Open No. 7-119637

  In the conventional compressor having the same configuration as that of Patent Document 1, after sealing the case and lid of the cylindrical body by welding, an internal space having a uniform inner diameter equal to the outer diameter of the compression mechanism portion is secured. In order to achieve this, it is necessary to perform tube expansion processing on the cylindrical case. On the other hand, in the compressor of Patent Document 1, the hardness of the welded portion of the cylindrical case with the lid of the cylindrical case is higher than that of other portions of the cylindrical case due to thermosetting.

  In a cylindrical case, if the welded part is harder than other parts, if the cylindrical case is expanded, the inner diameter of the cylindrical case is not uniform, and the cylindrical case is welded. A portion adjacent to the portion may be tapered. When the compression mechanism portion is arranged in the tapered cylindrical case portion, the gap between the side surface portion of the compression mechanism portion and the inner side surface of the cylindrical case is not constant. It may be fixed to the closed container in a distorted state. Therefore, in the compressor of patent document 1, when the compression mechanism part was fixed to the airtight container in the distorted state, the performance of the compressor fell and there existed a subject that the reliability of a compressor could not be ensured.

  The present invention solves the above-described problem, and a compressor capable of avoiding a decrease in performance and ensuring reliability due to being fixed to a pressure-sealed container in a state where the compression mechanism section is distorted, and the compression It aims at providing the manufacturing method of a machine, and the pipe expansion apparatus which can manufacture this pressure sealed container.

  A compressor according to the present invention includes a compression mechanism portion that compresses a refrigerant, a crankshaft that transmits a rotational driving force to the compression mechanism portion, an electric motor portion that generates the rotational driving force on the crankshaft, and a cylindrical body. Part, a bottom part joined to one end of the body part, and a lid part joined to the other end of the body part, containing the compression mechanism part, the crankshaft, and the electric motor part, The body portion includes a pressure sealed container to which the compression mechanism portion and the electric motor portion are fixed, and the first body expansion is performed before the bottom portion is joined to the body portion. An inner surface, a second inner surface having a smaller inner diameter than the first inner surface, and a third inner surface extending between the first inner surface and the second inner surface are formed, and the body portion Second pipe expansion performed after the bottom is joined to Accordingly, the second inner surface and the third inner surface is tube expansion to the inside diameter of the first inner surface.

  The compressor manufacturing method according to the present invention includes a cylindrical body part, a bottom part joined to one end of the body part, and a pressure sealed having a lid part joined to the other end of the body part. A method of manufacturing a compressor including a container, wherein the first inner surface, a second inner surface having a smaller inner diameter than the first inner surface, and the first before the bottom portion is joined to the body portion. A first tube-expansion forming step of forming an inner side surface and a third inner side surface extending between the second inner side surface in the body part; and after the bottom part is joined to the body part, the second inner side A second tube expansion forming step of expanding the side surface and the third inner surface to the inner diameter of the first inner surface;

  The tube expansion device according to the present invention is a tube expansion device for manufacturing a pressure sealed container of a compressor, and includes a cylindrical first outer surface portion and a first outer surface portion having a smaller radius on the circumferential surface than the first outer surface portion. A tube expansion mold portion having two outer surface portions, a third outer surface portion extending between the first outer surface portion and the second outer surface portion, a casing portion supporting the tube expansion mold portion, and the tube expansion A rod portion reciprocally disposed within the mold portion and the casing portion, the tube expansion mold portion being disposed adjacent to a circumferential direction of the tube expansion mold portion, and movement of the rod portion A plurality of split molds that move in the circumferential surface direction of the tube expansion mold part are provided, and each of the split molds includes a first curved surface part having an arcuate surface shape that constitutes the first outer surface part. A second curved surface portion having a circular arc surface shape constituting the second outer surface portion, and the third outer surface. Configure, and a connecting surface portion extending between said first curved surface portion and the second curved surface portion.

  According to the present invention, by performing the first tube expansion molding and the second tube expansion molding, it is possible to avoid fixing the compression mechanism portion to the pressure sealed container in a distorted state. Therefore, according to the present invention, a compressor capable of avoiding deterioration in performance and securing reliability due to being fixed to the pressure sealed container in a state where the compression mechanism portion is distorted, and a method for manufacturing the compressor, A tube expansion device for manufacturing the pressure-sealed container can be provided.

It is a longitudinal section showing roughly an example of compressor 1 concerning Embodiment 1 of the present invention. It is the schematic in the AA cross section of FIG. 1 which shows an example of the internal structure of the compression mechanism part 30 of the compressor 1 which concerns on Embodiment 1 of this invention. In the manufacturing process of the compressor 1 of Embodiment 1 of this invention, it is a perspective view which shows roughly the external appearance of the steel plate 50 before shaping | molding used at the manufacturing process of the trunk | drum 2a of the pressure sealed container 2. FIG. It is the schematic which shows the structure of the steel plate 50 before winding forming, and the one part structure of the roll apparatus 100 in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. It is the schematic which shows the structure of the steel plate 50 at the time of the start of winding forming, and the one part structure of the roll apparatus 100 in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. It is the schematic which shows the structure of the steel plate 50 during winding forming, and the one part structure of the roll apparatus 100 in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. It is the schematic which shows the structure of the steel plate 50 at the time of completion | finish of winding forming, and the one part structure of the roll apparatus 100 in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. It is the schematic which shows the one part structure of the steel plate 50 at the time of the start of reduced tube forming, and the reduced tube apparatus 110 in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. It is the schematic which shows the structure of the steel plate 50 in the manufacturing process of the compressor 1 of Embodiment 1 of this invention, and the steel plate 50 and the tube contraction apparatus 110 during the tube forming. It is the schematic which shows the partial structure of the steel plate 50 and the butt welding apparatus 120 at the time of butt welding in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. In the manufacturing process of the compressor 1 of Embodiment 1 of this invention, it is the schematic which shows an example of the external appearance structure of the 1st pipe expansion apparatus 130 of the 1st pipe expansion apparatus 200a used by 1st pipe expansion molding. It is the schematic which shows a part of cross-sectional structure of the 1st pipe mold part 140 of FIG. It is the schematic which shows the modification of the shape of the cross-sectional part 144b of the 3rd outer surface part 144 in the 1st tube expansion instrument 130 of Embodiment 1 of this invention. It is the schematic which shows another modification of the cross-sectional part 144b of the 3rd outer surface part 144 in the 1st tube expansion instrument 130 of Embodiment 1 of this invention. It is the schematic which shows another modification of the cross-sectional part 144b of the 3rd outer surface part 144 in the 1st tube expansion instrument 130 of Embodiment 1 of this invention. It is the schematic which shows another modification of the cross-sectional part 144b of the 3rd outer surface part 144 in the 1st tube expansion instrument 130 of Embodiment 1 of this invention. It is the schematic which shows the internal structure of the 1st tube expansion instrument 130 of FIG. In the manufacturing process of the compressor 1 of Embodiment 1 of this invention, it is the schematic which shows another modification of the external appearance structure of the 1st pipe expansion apparatus 130 of the 1st pipe expansion apparatus 200a used by 1st pipe expansion molding. In the manufacturing process of the compressor 1 of Embodiment 1 of this invention, it is the schematic which shows another modification of the external appearance structure of the 1st pipe expansion apparatus 130 of the 1st pipe expansion apparatus 200a used by 1st pipe expansion molding. It is the schematic which shows the internal structure of the 1st tube expansion instrument 130 of FIG. Schematic showing the cross-sectional structure of the body portion 2a of the pressure-sealed container 2 and the partial cross-sectional structure of the first tube expansion device 200a before the first tube expansion molding in the manufacturing process of the compressor 1 according to Embodiment 1 of the present invention. FIG. In the manufacturing process of the compressor 1 of Embodiment 1 of this invention, it is the schematic which shows the cross-sectional structure of the trunk | drum 2a of the pressure sealed container 2 at the time of the 1st pipe expansion molding, and the partial cross-section of the 1st pipe expansion apparatus 200a. is there. It is the schematic which shows the structure of the trunk | drum 2a of the pressure sealed container 2 at the time of an end surface process in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. It is the schematic which shows the one part structure of the trunk | drum 2a and the bottom part 2b of the pressure sealed container 2 at the time of circumferential welding, and the circumferential welding apparatus 160 in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. . It is sectional drawing which shows roughly the structure of the trunk | drum 2a and the bottom part 2b of the pressure sealed container 2 expanded by 2nd expansion molding in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. It is the schematic which shows an example of the one part external appearance structure of the 2nd pipe expansion instrument 170 of the 2nd pipe expansion apparatus 200b used by the 2nd pipe expansion molding in the manufacturing process of the compressor 1 of this Embodiment 1. FIG. It is the schematic which shows the internal structure of the 2nd tube expansion instrument 170 of FIG. In the manufacturing process of the compressor 1 according to Embodiment 1 of the present invention, the cross-sectional structure of the body portion 2a and the bottom portion 2b of the pressure-sealed container 2 and the partial cross-sectional structure of the second tube expansion device 200b before the second tube expansion molding is performed. It is the schematic which shows an example. In the manufacturing process of the compressor 1 of Embodiment 1 of this invention, an example of the cross-sectional structure of the trunk | drum 2a and the bottom part 2b of the pressure sealed container 2 at the time of 2nd pipe expansion molding, and a partial cross-section of the 2nd pipe expansion apparatus 200b FIG. It is the schematic which shows another example of the cross-section of the trunk | drum 2a and the bottom 2b of the pressure sealed container 2 before performing 2nd pipe expansion shaping | molding in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. It is the schematic which shows another example of the cross-section of the trunk | drum 2a and the bottom part 2b of the pressure sealed container 2 after performing 2nd pipe expansion shaping | molding in the manufacturing process of the compressor 1 of Embodiment 1 of this invention. It is the schematic which shows an example of the cross-section of the trunk | drum 2a of the pressure sealed container 2 before performing 1st pipe expansion shaping | molding in the manufacturing process of the conventional compressor 1, and the partial cross-section of the 1st pipe expansion apparatus 200a. It is the schematic which shows an example of the cross-section of the trunk | drum 2a of the pressure sealed container 2 at the time of the 1st pipe expansion shaping | molding in the manufacturing process of the conventional compressor 1, and the partial cross-section of the 1st pipe expansion apparatus 200a. Schematic which shows an example of the cross-sectional structure of the trunk | drum 2a and the bottom part 2b of the pressure sealed container 2 before performing 2nd pipe expansion shaping | molding in the manufacturing process of the conventional compressor 1, and the partial cross-section of the 2nd pipe expansion apparatus 200b. It is. It is the schematic which shows an example of the cross-sectional structure of the trunk | drum 2a and the bottom part 2b of the pressure sealed container 2 at the time of the 2nd pipe expansion shaping | molding in the manufacturing process of the conventional compressor 1, and the partial cross-section of the 2nd pipe expansion apparatus 200b. . It is sectional drawing which shows roughly the structure of the trunk | drum 2a and the bottom part 2b of the pressure sealed container 2 after the 2nd pipe expansion shaping | molding in the manufacturing process of the conventional compressor 1. FIG. The width of the distortion of the body portion 2a of the pressure sealed container 2 after the second tube expansion molding in the manufacturing process of the conventional compressor 1 and the second tube expansion molding in the manufacturing process of the compressor 1 according to the first embodiment of the present invention. It is the graph which compared the width | variety of the trunk | drum 2a of the pressure sealed container 2 relatively.

Embodiment 1 FIG.
The configuration of the compressor 1 according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a longitudinal sectional view schematically showing an example of a compressor 1 according to the first embodiment. The compressor 1 is used in a refrigeration cycle apparatus such as an air conditioner, and is an element constituting a refrigerant circuit of the refrigeration cycle apparatus.

  In the following drawings including FIG. 1, the refrigerant circuit and other components constituting the refrigerant circuit such as a radiator, an evaporator, a decompression device, and an oil separator are not illustrated. In the following drawings, the dimensional relationship and shape of each component may be different from the actual one. Moreover, in the following drawings, the same code | symbol is attached | subjected to the same or similar member or part, or the code | symbol is abbreviate | omitted. Further, in the following description, the positional relationship between the constituent members of the compressor 1, for example, the positional relationship such as the vertical relationship, is basically the positional relationship when the compressor 1 is installed in a usable state.

  The compressor 1 is a rolling piston type rotary compressor, and is a fluid machine that discharges a low-pressure gas refrigerant sucked into the compressor 1 as a high-pressure gas refrigerant. The casing of the compressor 1 is configured as a cylinder-shaped pressure sealed container 2. The pressure sealed container 2 includes a hollow cylindrical body portion 2a, a bottom portion 2b having a U-shaped longitudinal section, and a lid portion 2c having an inverted U-shaped longitudinal section, and an opening of the bottom portion 2b and the lid portion 2c. The outer side surface of the part is fixed to the inner side surface of the opening of the body part 2a. The fixed portion with the bottom portion 2b and the fixed portion with the lid portion 2c of the body portion 2a are joined by, for example, arc welding or resistance welding.

  A housing 3 a of a suction muffler 3 is disposed outside the body portion 2 a of the pressure sealed container 2. Although not shown in the following drawings including FIG. 1, the housing 3 a of the suction muffler 3 is fixed to the body portion 2 a of the pressure sealed container 2 through a support member disposed on the outer surface of the pressure sealed container 2. . An inflow pipe 3b is fixed to the top of the housing 3a of the suction muffler 3 through the housing 3a. The inflow pipe 3 b is a refrigerant pipe through which a low-pressure gas refrigerant or a two-phase refrigerant having a high degree of dryness flows into the housing 3 a of the suction muffler 3. In addition, one end of the suction pipe 4 passes through and is fixed to the bottom of the housing 3 a of the suction muffler 3, and the other end of the suction pipe 4 passes through the side surface of the body portion 2 a of the pressure sealed container 2. And fixed.

  The suction muffler 3 is a silencer that reduces or eliminates noise generated by the refrigerant flowing from the inflow pipe 3b. The suction muffler 3 also has an accumulator function, and has a refrigerant storage function for storing surplus refrigerant and a gas-liquid separation function for retaining liquid refrigerant that is temporarily generated when the operating state changes. Have. Due to the gas-liquid separation function of the suction muffler 3, it is possible to prevent a large amount of liquid refrigerant from flowing into the pressure sealed container 2 and performing liquid compression in the compressor 1.

  The suction pipe 4 is a refrigerant pipe that sucks low-pressure gas refrigerant from the suction muffler 3 into the pressure sealed container 2. A fixing member 6 is disposed in the suction hole 5 provided in the body portion 2 a of the pressure sealed container 2, and the suction pipe 4 is connected to the pressure sealed container 2 via the fixing member 6 disposed in the suction hole 5. The body part 2a is fixed. Although not shown in the following drawings including FIG. 1, the suction pipe 4 is provided with an oil return hole in the side surface portion, and the lubricating oil component contained in the high-pressure gas refrigerant separated in the oil separator of the refrigeration cycle apparatus. May be returned to the inside through the suction pipe 4.

  The fixing member 6 can be configured to include, for example, an extension pipe 6a, a connection pipe 6b, and a ring 6c. The extension pipe 6 a is inserted into the suction hole 5 and communicates with the inside of the pressure sealed container 2. The suction pipe 4 is inserted into the extension pipe 6a. The connecting pipe 6b is joined to the outer surface of the extension pipe 6a, and seals the gap between the outer surface of the suction pipe 4 and the inner side surface of the extension pipe 6a. The ring 6 c is joined to the suction hole 5, joined to the outer surfaces of the extension pipe 6 a and the connection pipe 6 b and the pressure sealed container 2, and seals a gap between the suction pipe 4 and the suction hole 5. The fixing member 6 ensures airtightness inside the pressure sealed container 2.

  A discharge pipe 7 is fixed through the upper surface of the lid portion 2c of the pressure sealed container 2. The discharge pipe 7 is a refrigerant pipe that discharges a high-pressure gas refrigerant to the outside of the pressure sealed container 2. The fixed portion between the discharge pipe 7 and the lid portion 2c is joined, for example, by brazing or resistance welding.

  Further, a glass terminal 8 is disposed on the upper surface of the lid portion 2 c of the pressure sealed container 2. The glass terminal 8 provides an interface for connecting an external power source. The external power supply is a power supply device that supplies power to the compressor 1, and a general commercial AC power supply having an AC frequency of 50 Hz or 60 Hz, or an inverter power supply capable of changing the AC frequency is used. When the frequency variable inverter power supply is used, the rotation speed of the compressor 1 can be changed, so that the compressor 1 can control the discharge amount of the high-pressure gas refrigerant from the discharge pipe 7. In the following description, the external power source connected to the glass terminal 8 is not shown in the following drawings including FIG.

  An electric motor unit 10, a crankshaft 20, and a compression mechanism unit 30 are accommodated in the pressure sealed container 2. The electric motor unit 10 is arranged above the arrangement position of the fixing member 6 in the pressure sealed container 2. The crankshaft 20 is disposed between the electric motor unit 10 and the compression mechanism unit 30 at the center of the pressure sealed container 2, and extends between the electric motor unit 10 and the compression mechanism unit 30 in the vertical direction. The compression mechanism unit 30 is arranged so that the inside of the compression mechanism unit 30 communicates with the suction pipe 4. That is, the electric motor unit 10 is disposed above the compression mechanism unit 30 inside the pressure sealed container 2. The hollow space inside the pressure sealed container 2 is filled with a high-pressure gas refrigerant compressed by the compression mechanism unit 30.

  The electric motor unit 10 is configured as a motor that generates a rotational driving force on the crankshaft 20 using electric power supplied from an external power source and transmits the rotational driving force to the compression mechanism unit 30 via the crankshaft 20. The electric motor unit 10 includes a stator 12 having a hollow cylindrical appearance in a top view, and a cylindrical rotor 14 that is rotatably disposed inside the inner surface of the stator 12. The stator 12 is fixed to the inner side surface of the body portion 2 a of the pressure sealed container 2 by shrink fitting or the like, and is connected to the glass terminal 8 through a conducting wire 16. The electric motor unit 10 can rotate the rotor 14 inside the inner surface of the stator 12 by supplying electric power from an external power source to the coil wound around the stator 12 via the conductive wire 16. In the compressor 1, for example, a DC brushless motor or the like is used as the electric motor unit 10.

  A crankshaft 20 is fixed to the center of the rotor 14 through the rotor 14. The crankshaft 20 is a rotating shaft that fixes the rotor 14 with a fixed surface 20 a that is a part of the outer surface of the crankshaft 20 and transmits the rotational driving force of the rotor 14 to the compression mechanism 30. The crankshaft 20 extends from the fixed surface 20 a in the vertical direction, that is, in the direction of the lid portion 2 c of the pressure sealed container 2 and the direction of the bottom portion 2 b of the pressure sealed container 2.

  The crankshaft 20 has a cylindrical eccentric portion 24 that is located below the fixed surface 20 a and is disposed inside the compression mechanism portion 30. On the outer side surface of the eccentric part 24, a piston 26 attached rotatably along the outer side surface of the eccentric part 24 is disposed.

  Although not shown in the following drawings including FIG. 1, a refrigerating machine oil 40 that extends upward from the lower end of the crankshaft 20 and is sucked up from the lower end of the crankshaft 20 at the center of the crankshaft 20. An oil hole through which the lubricating oil is flowing is provided. In addition, a plurality of oil supply ports that communicate with the above-described oil holes and supply lubricating oil to the compression mechanism 30 are provided on the outer surface of the crankshaft 20.

  Although not shown in the following drawings including FIG. 1, a centrifugal pump can be arranged at the lower end of the oil hole of the crankshaft 20. The above-described centrifugal pump is configured as, for example, a spiral centrifugal pump so that the refrigerating machine oil 40 stored at the bottom of the bottom 2b of the pressure sealed container 2 can be sucked up. As the refrigerating machine oil 40, for example, mineral oil-based, alkylbenzene-based, polyalkylene glycol-based, polyvinyl ether-based, polyol ester-based lubricating oil, or the like is used.

  Next, the structure of the compression mechanism 30 of the compressor 1 will be described with reference to FIG. 2 together with FIG. FIG. 2 is a schematic diagram of the AA cross section of FIG. 1 showing an example of the internal structure of the compression mechanism unit 30 of the compressor 1 according to the first embodiment.

  The compression mechanism unit 30 compresses the low-pressure gas refrigerant sucked into the low-pressure space of the pressure sealed container 2 from the suction pipe 4 into the high-pressure gas refrigerant by the rotational driving force supplied from the electric motor unit 10, and compresses the compressed high-pressure gas refrigerant. A gas refrigerant is discharged above the compression mechanism 30.

  The compression mechanism portion 30 extends between a pair of hollow disk surfaces 31a, an inner side surface 31b extending between the inner edge portions of the pair of hollow disk surfaces 31a, and an outer edge portion of the pair of hollow disk surfaces 31a. A hollow cylindrical cylinder 31 having an outer side surface 31c is provided. The outer surface 31c of the cylinder 31 is fixed to the inner surface of the body portion 2a of the pressure sealed container 2 by arc welding such as arc spot welding or shrink fitting. The hollow portion 310 of the cylinder 31 is formed in a space surrounded by the inner surface 31b of the cylinder 31, and accommodates the eccentric portion 24 and the piston 26 of the crankshaft 20. That is, the cylinder 31 is configured so that the eccentric portion 24 of the crankshaft 20 and the piston 26 can rotate eccentrically by the rotation of the crankshaft 20 in the hollow portion 310 of the cylinder 31.

  The cylinder 31 has a suction passage 312 that allows the suction pipe 4 and the hollow portion 310 of the cylinder 31 to communicate with each other via the connection pipe 6 b and allows low-pressure gas refrigerant to flow from the suction pipe 4 into the hollow portion 310 of the cylinder 31. Is provided. A semicircular discharge passage 314 extending in the vertical direction is provided on the inner surface of the cylinder 31. Further, the cylinder 31 is provided with a vane groove 316 extending in the radial direction from the inner side surface 31b of the cylinder 31 toward the outer side surface 31c of the cylinder 31 in a top view.

  A vane 32 is accommodated in the vane groove 316 of the cylinder 31. The vane 32 is a sliding member configured to reciprocate in the radial direction inside the vane groove 316 by the eccentric movement of the piston 26. The tip 32 a of the vane 32 disposed in the hollow portion 310 of the cylinder 31 is caused by the restoring force of the elastic body 33 such as a spring provided in the vane groove 316 or the pressure from the high-pressure portion above the compression mechanism 30. The piston 26 is pressed against the outer surface. As shown in FIG. 2, during the rotational drive of the piston 26, the hollow portion 310 of the cylinder 31 has a low-pressure space portion 310 a that communicates with the suction passage 312 and a high-pressure space that communicates with the discharge passage 314 by the vane 32 and the piston 26. It is divided into a part 310b. The low pressure space portion 310a and the high pressure space portion 310b are spaces that constitute a compression chamber of the compression mechanism portion 30 described later. In the compression chamber of the compression mechanism section 30, the low pressure space portion 310a is also referred to as a low pressure chamber, and the high pressure space portion 310b is also referred to as a high pressure chamber.

  The cylinder 31 is provided with a vane groove opening 318 that communicates with the vane groove 316 and penetrates the pair of hollow disk surfaces 31 a of the cylinder 31. In the compression mechanism portion 30, the pressure from the high pressure portion above the compression mechanism portion 30 can be applied to the end portion 32 b of the vane 32 through the vane groove opening 318. Further, the movement of the vane 32 toward the outer surface of the cylinder 31 can be restricted by the vane groove opening 318. Further, the lubricating oil separated from the high-pressure gas refrigerant by the vane groove opening 318 is supplied to the clearance between the vane groove 316 and the vane 32, and the vane 32 can be smoothly reciprocated.

  Although not shown in the following drawings including FIG. 1, the clearance between the vane groove 316 and the vane 32 is configured so that friction does not occur between the vane groove 316 and the vane 32. On the other hand, when the clearance between the vane groove 316 and the vane 32 is increased, the refrigerant gas compressed in the hollow portion 310 of the cylinder 31 is transferred to the outside of the compression mechanism unit 30 via the clearance and the vane groove opening 318. Leakage may cause compression efficiency to decrease. Therefore, in the compression mechanism section 30, by reducing the clearance to such an extent that friction does not occur between the vane groove 316 and the vane 32, leakage of the compressed refrigerant gas is suppressed, leakage loss is reduced, and compression efficiency is reduced. Can be improved.

  The cylinder 31 is provided with a plurality of openings 319 that are located on the outer surface 31c side of the cylinder 31 and penetrate the pair of hollow disk surfaces 31a. Since the lubricating oil separated from the high-pressure gas refrigerant by the opening 319 and moved to the hollow disk surface 31a on the upper side of the cylinder 31 by the action of gravity can be returned to the bottom 2b of the pressure-sealed container 2, The exhaust of the machine oil 40 can be prevented.

  An upper bearing 34 is disposed on the hollow disk surface 31 a on the upper side of the cylinder 31, that is, on the hollow disk surface 31 a on the lid portion 2 c side of the pressure sealed container 2. A lower bearing 35 is disposed on the hollow disk surface 31 a on the lower side of the cylinder 31, that is, on the hollow disk surface 31 a on the side of the bottom 2 b of the pressure sealed container 2. The upper bearing 34 and the lower bearing 35 are sliding bearings that slidably support the crankshaft 20.

  The upper bearing 34 has a hollow disc shape when viewed from above. The upper bearing 34 has a fixed portion 34a fixed to the hollow disk surface 31a on the upper side of the cylinder 31, and a bearing portion 34b that supports the outer surface of the crankshaft 20 so as to be slidable. The upper bearing 34 is displayed as two L-shaped members in the longitudinal sectional view of FIG. Moreover, the upper bearing 34 is being fixed to the hollow disc surface 31a above the cylinder 31 with the volt | bolt etc., for example.

  The lower bearing 35 has a hollow disk shape when viewed from below. The lower bearing 35 includes a fixed portion 35a that is fixed to the lower hollow disk surface 31a of the cylinder 31, and a bearing portion 35b that slidably supports the outer surface of the crankshaft 20. In addition, the lower bearing 35 is displayed as two L-shaped members in the longitudinal sectional view of FIG. Further, the lower bearing 35 is fixed to the hollow disk surface 31a on the lower side of the cylinder 31 with, for example, a bolt or the like.

  In the compression mechanism portion 30, a sealable space surrounded by the piston 26, the cylinder 31, the vane 32, the fixed portion 34 a of the upper bearing 34, and the fixed portion 35 a of the lower bearing 35 is a low pressure sucked from the suction pipe 4. A compression chamber for compressing the gas refrigerant. The high-pressure gas refrigerant compressed in the compression chamber is discharged from a discharge port provided in the upper bearing 34. The discharge port provided in the upper bearing 34 is not shown in the following drawings including FIG.

  In the first embodiment, the compressor 1 is configured as a vertical compressor, but may be configured as a horizontal compressor. In the first embodiment, the compressor 1 is configured as a rolling piston type rotary compressor. However, the compressor 1 may be configured as a screw compressor or a scroll compressor even if configured as a swing vane type swing compressor. May be. In the first embodiment, the rotary compressor is configured as a single rotary type, but may be configured as a twin rotary type rotary compressor. Further, in the first embodiment, the compressor 1 is a single-stage compressor and has only one compression mechanism unit 30. However, the compressor 1 is a multi-stage compressor, and a plurality of compression mechanism units 30 provide refrigerant. It is good also as a structure which compresses sequentially.

  Moreover, a charge pipe can be penetrated and fixed to the upper surface of the lid portion 2c of the pressure sealed container 2. The charge pipe is configured so that lubricating oil can be sealed inside the pressure sealed container 2 even if the pressure sealed container 2 can be evacuated and gas refrigerant can be sealed inside the pressure sealed container 2. May be.

  Further, an oil separation plate is provided above the fixed surface 20a of the crankshaft 20 to separate the lubricating oil contained in the high-pressure gas refrigerant discharged from the compression mechanism 30 by the centrifugal force generated by the rotation of the crankshaft 20. Can do.

  In addition, a silencer that removes or reduces noise generated when the refrigerant is compressed in the compression mechanism 30 can be disposed on the upper surface side of the fixed portion 34 a of the upper bearing 34. The silencer can be provided with a plurality of openings through which high-pressure gas refrigerant flowing from the discharge port provided in the upper bearing 34 is discharged into the pressure sealed container 2.

  Next, operation | movement of the compressor 1 of this Embodiment 1 is demonstrated.

  When the crankshaft 20 is rotated by driving the electric motor unit 10, the eccentric portion 24 and the piston 26 housed in the cylinder 31 are eccentrically rotated together with the crankshaft 20. Due to the eccentric rotation of the eccentric portion 24 and the piston 26, the outer peripheral surface of the piston 26 moves in contact with the inner side surface 31 b of the cylinder 31 in the hollow portion 310 of the cylinder 31. In conjunction with the eccentric rotation of the piston 26 of the cylinder 31, the vane 32 provided in the vane groove 316 of the cylinder 31 performs a piston motion. The low-pressure gas refrigerant that has flowed from the suction pipe 4 into the compression mechanism 30 via the suction passage 312 is surrounded by the piston 26, the cylinder 31, the vane 32, the fixed portion 34a of the upper bearing 34, and the fixed portion 35a of the lower bearing 35. Flows into the compression chamber, which is a sealed space. The low-pressure gas refrigerant flowing into the compression chamber is compressed into the high-pressure gas refrigerant as the compression chamber volume decreases due to the eccentric rotation of the piston 26. The high-pressure gas refrigerant is discharged into a hollow space inside the pressure sealed container 2 outside the compression mechanism portion 30 through a discharge port provided in the upper bearing 34. The high-pressure gas refrigerant discharged into the hollow space inside the pressure-sealed container 2 passes through, for example, the gap between the stator 12 and the rotor 14 of the electric motor unit 10 and is pressure-sealed through the discharge pipe 7. It is discharged out of the container 2.

  Next, a manufacturing method and a manufacturing apparatus according to the compressor 1 of the first embodiment will be described.

  FIG. 3 is a perspective view schematically showing an external appearance of a steel sheet 50 before forming used in the manufacturing process of the body portion 2a of the pressure-tight container 2 in the manufacturing process of the compressor 1 of the first embodiment. As shown in FIG. 3, a rectangular steel plate 50 having a first plate-like surface portion 52a and a second plate-like surface portion 52b, which are a pair of rectangular plate-like surface portions 52, is used for manufacturing the body portion 2a. As a material of the steel plate 50, for example, a steel material such as stainless steel or carbon steel is used.

  The body portion 2a of the pressure sealed container 2 is manufactured by forming a steel plate 50. For example, the body portion 2a of the pressure-sealed container 2 is manufactured by joining a first edge portion 54a and a second edge portion 54b, which are one pair of edge portions of the steel plate 50, by welding or the like. Further, the body portion 2a of the pressure sealed container 2 has a plate-like surface portion 52 of the steel plate 50 formed into a cylindrical shape, and a third edge portion 56a and a fourth edge portion which are the other pair of edge portions of the steel plate 50. 56b is manufactured by being formed into a circumferential shape.

  FIG. 4 is a schematic diagram showing the structure of the steel plate 50 before winding and the partial structure of the roll device 100 in the manufacturing process of the compressor 1 of the first embodiment.

  As shown in FIG. 4, in the winding of the steel plate 50, for example, a roll device 100 having a first roller 100a, a second roller 100b, and a third roller 100c is used. The 1st roller 100a is arrange | positioned so that the one plate-shaped surface part 52 of the steel plate 50, for example, the 2nd plate-shaped surface part 52b may be contacted. Moreover, in the roll apparatus 100, the diameter of the 1st roller 100a can be comprised larger than the diameter of the 2nd roller 100b and the 3rd roller 100c.

  FIG. 5 is a schematic diagram showing the structure of the steel plate 50 and the structure of a part of the roll device 100 at the start of winding forming in the manufacturing process of the compressor 1 of the first embodiment. In FIG. 5, the pressing directions of the second roller 100b and the third roller 100c at the start of winding forming are indicated by arrows.

  As shown in FIG. 5, at the start of winding, the roll device 100 presses the second roller 100b and the third roller 100c perpendicularly to the first plate-like surface portion 52a of the steel plate 50, so that the first plate An operation of pressing the surface portion 52a toward the first roller 100a is performed. In the roll apparatus 100, the steel plate 50 can be sandwiched between the first roller 100a by the pressing operation of the second roller 100b and the third roller 100c.

  FIG. 6 is a schematic diagram showing the structure of the steel plate 50 during the forming and the partial structure of the roll device 100 in the manufacturing process of the compressor 1 of the first embodiment. In FIG. 6, the rotation directions of the first roller 100a, the second roller 100b, and the third roller 100c during winding are indicated by arrows.

  As shown in FIG. 6, during the winding, the first roller 100a rotates in the opposite direction to the second roller 100b and the third roller 100c. For example, as shown in FIG. 6, in the roll device 100, the first roller 100a performs a counterclockwise rotation operation, and the second roller 100b and the third roller 100c perform a clockwise rotation operation. In the roll device 100, the steel plate 50 is moved along the first roller 100a in the rotation direction of the first roller 100a by the rotation operation of the first roller 100a, the second roller 100b, and the third roller 100c, and the winding is performed. Can be done.

  FIG. 7 is a schematic diagram showing the structure of the steel plate 50 and the structure of a part of the roll device 100 at the end of winding forming in the manufacturing process of the compressor 1 of the first embodiment.

  As shown in FIG. 7, the steel plate 50 is wound by the rotating operation of the first roller 100 a, the second roller 100 b, and the third roller 100 c in the roll device 100, and the third edge portion 56 a of the steel plate 50 is C-shaped. It is wound into a shape. After the end of the winding, in the roll device 100, an operation of moving the second roller 100b and the third roller 100c away from the steel plate 50 is performed. After the movement of the second roller 100b and the third roller 100c, in the roll apparatus 100, the steel plate 50 is removed from the first roller 100a.

  As described above with reference to FIGS. 4 to 7, in the manufacturing process of the compressor 1 of the first embodiment, the rectangular steel plate 50 is wound around the C-shaped steel plate 50 by winding. .

  FIG. 8 is a schematic diagram showing a partial structure of the steel plate 50 and the reduced tube device 110 at the start of the reduced tube forming in the manufacturing process of the compressor 1 of the first embodiment.

  As shown in FIG. 8, in the contraction forming of the C-shaped steel plate 50, for example, the first contraction mold 112 having the semicircular first groove 112 a and the semicircular second groove 114 a are included. A contraction device 110 having a second contraction die 114 is used. In the contraction device 110, the first groove portion 112a of the first contraction tube mold 112 is disposed so as to face the second groove portion 114a of the second contraction tube mold 114. At the start of the reduced tube forming, the steel plate 50 wound into a C-shape is sandwiched between the first groove portion 112a and the second groove portion 114a of the reduced tube apparatus 110.

  FIG. 9 is a schematic diagram showing the structure of the steel plate 50 and the reduced tube device 110 during the reduced tube forming in the manufacturing process of the compressor 1 of the first embodiment. In FIG. 9, the pressing direction of the second reduced tube mold 114 during the reduced tube forming is indicated by an arrow.

  As shown in FIG. 9, during the reduced tube forming, the reduced tube apparatus 110 performs an operation of pressing the second reduced tube mold 114 toward the first reduced tube mold 112. In the contraction device 110, the first edge portion 54 a and the second edge portion 54 b of the steel plate 50 can be brought into contact with each other by the pressing operation of the second contraction die 114. In addition, the steel plate 50 sandwiched between the first groove portion 112a and the second groove portion 114a is formed into a cylindrical shape by the pressing operation of the second contraction die 114. After completion of the reduced tube forming, in the reduced tube apparatus 110, an operation of moving the second reduced tube mold 114 in a direction away from the steel plate 50 is performed. After the movement of the second reduced tube mold 114, the steel plate 50 is removed from the first reduced tube mold 112 in the reduced tube apparatus 110.

  As described above with reference to FIGS. 8 and 9, in the manufacturing process of the compressor 1 according to the first embodiment, the C-shaped steel plate 50 is reduced into the cylindrical steel plate 50 by the tube forming. Is done.

  FIG. 10 is a schematic diagram illustrating a partial structure of the steel plate 50 and the butt welding apparatus 120 during butt welding in the manufacturing process of the compressor 1 according to the first embodiment. In FIG. 10, the moving direction of the butt welding apparatus 120 in butt welding is indicated by an arrow. As shown in FIG. 10, the first edge portion 54 a and the second edge portion 54 b of the steel plate 50 formed into a cylindrical shape by reduced tube forming are joined by a butt welding device 120. In the manufacturing process of the compressor 1 according to the first embodiment, the body portion 2 a of the cylindrical pressure sealed container 2 is formed by butt welding of the steel plate 50.

  The butt welding device 120 can be configured, for example, as a resistance welding welding device such as seam welding or an arc welding welding device such as TIG welding. The butt welding device 120 includes a first welding torch 122 that welds the first edge portion 54a and the second edge portion 54b of the steel plate 50. Although not shown in FIG. 10, the butt welding apparatus 120, for example, a welding power source that converts AC power supplied from a commercial AC power source into power used for welding, and amplifies the current flowing from the welding power source for welding. And a welding transformer that flows through the first welding torch 122. A first welding electrode 124 is attached to the distal end portion 122 a of the first welding torch 122. The first welding electrode 124 can be configured as, for example, a pure metal electrode such as a pure tungsten electrode or a pure molybdenum electrode, or an alloy electrode such as a copper chromium alloy electrode or a copper alumina alloy electrode.

  The first edge portion 54a and the second edge portion 54b of the steel plate 50 are joined by welding, but may be joined by brazing or the like.

  Next, in the manufacturing process of the compressor 1 according to the first embodiment, it is used in the process of expanding and forming the body portion 2a of the pressure-sealed container 2 manufactured by winding the steel sheet 50, reducing the tube, and butt welding. The apparatus will be described. The step of expanding and forming the body portion 2a of the pressure-sealed container 2 is to reduce the distortion of the body portion 2a of the pressure-sealed container 2 manufactured by winding the steel sheet 50, reducing the tube shape, and butt welding. Will be referred to as “first tube expansion molding”.

  FIG. 11 is a schematic diagram illustrating an example of an external structure of the first tube expansion device 130 of the first tube expansion device 200a used in the first tube expansion molding in the manufacturing process of the compressor 1 according to the first embodiment.

  The 1st pipe expansion instrument 130 is comprised as a jig | tool which comprises a part of 1st pipe expansion apparatus 200a. As shown in FIG. 11, the first tube expansion device 130 supports the first tube expansion mold portion 140 and the first tube expansion mold portion 140 that performs the first tube expansion molding of the body portion 2 a of the pressure sealed container 2. And a casing part 150. In addition, the first tube expanding device 130 includes a first rod portion 155 that is reciprocally disposed inside the first tube expanding mold portion 140 and the first casing portion 150.

  The outer surface portion 141 of the first tube expansion mold portion 140 includes a first outer surface portion 142 having a circumferential shape, a second outer surface portion 143 having a smaller radius than the first outer surface portion 142, and a first outer surface portion 142. And a third outer surface portion 144 extending between the first outer surface portion 143 and the second outer surface portion 143. That is, the outer surface 141 of the first tube expansion mold 140 has two circumferential surfaces with different radii. In FIG. 11, the first outer surface part 142 of the first tube expansion mold part 140 is arranged on the first casing part 150 side.

  The first tube expansion mold part 140 includes a plurality of first divided molds 140 a disposed adjacent to the outer surface portion 141 of the first tube expansion mold part 140 in the circumferential direction. The shapes of the first divided molds 140a can all be the same.

  The outer surface 141a of the first split mold 140a includes a first curved surface portion 142a having a circular arc shape that is a part of the first outer surface portion 142, and a second curved shape having a circular arc shape that is a part of the second outer surface portion 143. And a surface portion 143a. Further, the outer side surface 141a of the first split mold 140a is a part of the third outer side surface portion 144, and has a connecting surface portion 144a extending between the first curved surface portion 142a and the second curved surface portion 143a. Yes.

  FIG. 12 is a schematic view showing a part of the cross-sectional structure of the first tube expansion mold part 140 of FIG. In FIG. 12, the center line A of the first tube expansion mold part 140 connecting the center of the first outer surface part 142 and the center of the second outer surface part 143 is shown by a one-dot chain line. In FIG. 12, the lengths of the radii of the first outer surface portion 142 and the second outer surface portion 143 are indicated by solid arrows.

  As shown in FIG. 12, the radius R1 of the first curved surface portion 142a of the first split mold 140a is configured to be larger than the radius R2 of the second curved surface portion 143a of the first split mold 140a. Further, at the time of the first tube expansion molding, the radius R1 of the first curved surface portion 142a is expanded to the inner diameter of the body portion 2a of the pressure sealed container 2 in the finished product of the compressor 1, but the second curved surface portion 143a The radius R1 is configured to be larger than the radius R2 of the second outer surface portion 143.

  Moreover, in the 1st pipe expansion mold part 140, the 3rd outer side surface part 144 extended between the 1st outer side surface part 142 and the 2nd outer side surface part 143 can be comprised, for example so that it may become a taper shape. For example, as shown in FIG. 12, the cross-sectional portion 144 b of the third outer surface portion 144 along the center line A is from the linear cross-section portion 142 b of the first outer surface portion 142 to the linear cross-section portion of the second outer surface portion 143. It can be configured to have a linear shape extending obliquely toward 143b.

  In FIG. 12, the third outer surface portion 144 is configured to have a tapered shape, and the cross-sectional portion 144b of the third outer surface portion 144 along the center line A is configured to have a linear shape. You may comprise so that it may become. Below, the modification of the cross-sectional shape of the 3rd outer side surface part 144 of the 1st tube expansion mold part 140 is demonstrated using FIGS. 13-16, However, In FIGS. 13-16, the structure of a part different from FIG. That is, only the cross-sectional shape of the third outer surface portion 144 of the first tube expansion mold portion 140 will be described.

  FIG. 13 is a schematic view showing a modification of the shape of the cross-sectional portion 144b of the third outer surface portion 144 in the first tube expanding device 130 of the first embodiment. In FIG. 13, as in FIG. 12, the center line A of the first tube expansion mold portion 140 connecting the center of the first outer surface portion 142 and the center of the second outer surface portion 143 is shown by a one-dot chain line. In FIG. 13, as in FIG. 12, the lengths of the radii of the first outer surface portion 142 and the second outer surface portion 143 are indicated by solid arrows. As shown in FIG. 13, the cross-sectional portion 144 b of the third outer surface portion 144 of the first tube expansion mold portion 140 is a linear cross-sectional portion 142 b of the first outer surface portion 142 and a linear cross-sectional portion of the second outer surface portion 143. It can comprise so that it may become a linear shape orthogonal to 143b.

  FIG. 14 is a schematic diagram showing another modification of the cross-sectional portion 144b of the third outer surface portion 144 in the first tube expanding device 130 of the first embodiment. In FIG. 14, as in FIGS. 12 and 13, the center line A of the first tube expansion mold part 140 connecting the center of the first outer surface part 142 and the center of the second outer surface part 143 is shown by a one-dot chain line. . Further, in FIG. 14, as in FIGS. 12 and 13, the lengths of the radii of the first outer surface portion 142 and the second outer surface portion 143 are indicated by solid arrows. As shown in FIG. 14, in the 1st pipe mold part 140, the 3rd outer side surface part 144 becomes convex shape, and the cross-sectional part 144b of the 3rd outer side surface part 144 can be comprised so that it may become a quarter circle shape.

  FIG. 15 is a schematic diagram illustrating another modification of the cross-sectional portion 144b of the third outer surface portion 144 in the first tube expanding device 130 of the first embodiment. In FIG. 15, as in FIGS. 12 to 14, the center line A of the first tube expansion mold part 140 connecting the center of the first outer surface part 142 and the center of the second outer surface part 143 is shown by a one-dot chain line. . In FIG. 15, as in FIGS. 12 to 14, the lengths of the radii of the first outer surface portion 142 and the second outer surface portion 143 are indicated by solid arrows. As shown in FIG. 15, in the first tube expansion mold part 140, the third outer surface part 144 can be formed in a concave shape, and the cross-sectional part 144 b of the third outer surface part 144 can be formed in a quadrant.

  FIG. 16 is a schematic view showing another modification of the cross-sectional portion 144b of the third outer surface portion 144 in the first tube expanding device 130 of the first embodiment. In FIG. 16, as in FIGS. 12 to 15, the center line A of the first tube expansion mold part 140 connecting the center of the first outer surface part 142 and the center of the second outer surface part 143 is shown by a one-dot chain line. . Further, in FIG. 16, as in FIGS. 12 to 15, the lengths of the radii of the first outer surface portion 142 and the second outer surface portion 143 are indicated by solid arrows. As shown in FIG. 16, in the first tube expansion mold part 140, the third outer surface part 144 can have a plurality of convex parts and concave parts, and the cross-sectional part 144 b of the third outer surface part 144 has a plurality of four parts. It can be configured to have a semicircular shape.

  FIG. 17 is a schematic view showing the internal structure of the first tube expanding device 130 of FIG. As shown in FIG. 17, a first hollow space portion 146 having a polygonal truncated pyramid shape surrounded by an inner side surface portion 145 of the first tube expansion mold portion 140 is provided inside the first tube expansion mold portion 140. . The inner side surface part 145 of the first tube expanding mold part 140 has a plurality of trapezoidal flat surface parts 145a which are the inner side surfaces of the first split mold 140a. The first hollow space portion 146 is configured as a polygonal frustum-shaped space by being surrounded by the flat surface portion 145a of the first split mold 140a. In FIG. 17, the first hollow space portion 146 is configured as a polygonal frustum-shaped space that decreases as the opening area of the first hollow space portion 146 moves away from the first casing portion 150.

  The first casing part 150 has a second hollow space part 150 a that communicates the external space of the first casing part 150 and the first hollow space part 146. For example, the second hollow space 150a can be a cylindrical space having an opening area larger than that of the first hollow space 146, for example.

  Although not shown in FIGS. 11 to 17, the first casing portion 150 is fixed to a support base of the first tube expansion device 200 a in order to ensure stability during the first tube expansion molding and reliability in the first tube expansion molding. Has been. The shape of the 1st casing part 150 should just be a shape fixable to a support stand, for example, can be comprised so that it may have external appearance, such as a cube shape and a cylindrical shape.

  As shown in FIG. 11, the first rod portion 155 has a polygonal truncated pyramid shaped insertion portion 158 having a plurality of trapezoidal outer surface portions 158a. The number of trapezoidal outer surface portions 158a in the polygonal frustum-shaped insertion portion 158 is the same as the number of the first split mold 140a. 11 and 17, the insertion portion 158 of the first rod portion 155 is inserted into the first hollow space portion 146 of the first tube expansion mold portion 140 via the second hollow space portion 150a of the first casing portion 150. Contained. 11 and 17, the first outer surface 142 is completed by pushing the insertion portion 158 of the first rod portion 155 toward the first tube expansion mold 140. The inner diameter of the body portion 2a of the pressure sealed container 2 in the product is expanded.

  The structure of the first tube expanding device 130 can be variously modified. Below, the modification of the structure of the 1st tube expansion instrument 130 is demonstrated using FIGS. 18-20, However, In FIGS. 18-20, only the structure of a different part from FIG. 11 or FIG. 17 is demonstrated.

  FIG. 18 is a schematic diagram illustrating another modified example of the external structure of the first tube expansion device 130 of the first tube expansion device 200a used in the first tube expansion molding in the manufacturing process of the compressor 1 of the first embodiment. . In the first pipe expanding device 130 of FIGS. 11 and 17, the first outer surface part 142 of the first pipe expanding mold part 140 is disposed on the first casing part 150 side. On the other hand, as shown in FIG. 18, the first outer surface portion 142 of the first tube expansion mold portion 140 can be disposed so as to be located on the opposite side of the first casing portion 150.

  FIG. 19 is a schematic diagram illustrating another modified example of the external structure of the first tube expansion device 130 of the first tube expansion device 200a used in the first tube expansion molding in the manufacturing process of the compressor 1 according to the first embodiment. . 20 is a schematic view showing the internal structure of the first tube expanding device 130 of FIG. 19 and 20, the first hollow space portion 146 is configured as a truncated pyramid-shaped space that decreases as the opening area of the first hollow space portion 146 moves away from the first casing portion 150. Is done.

  In the first tube expanding device 130 of FIGS. 11 and 17, the insertion portion 158 of the first rod portion 155 is inserted through the second hollow space portion 150 a of the first casing portion 150 into the first tube expanding mold portion 140. One hollow space 146 is accommodated. On the other hand, as shown in FIGS. 19 and 20, the insertion portion 158 of the first rod portion 155 is inserted into the second hollow portion 146 of the first casing portion 150 via the first hollow space portion 146 of the first tube expansion mold portion 140. It can comprise so that it may be accommodated in the space part 150a. 19 and 20, the first outer surface 142 in the finished product of the compressor 1 is obtained by pulling the insertion portion 158 of the first rod portion 155 in the direction of the first casing portion 150. The inner diameter of the body portion 2a of the pressure sealed container 2 is expanded.

  FIG. 21 shows a cross-sectional structure of the body portion 2a of the pressure-sealed container 2 and a partial cross-sectional structure of the first tube expansion device 200a before the first tube expansion molding in the manufacturing process of the compressor 1 of the first embodiment. FIG. FIG. 22 is a schematic diagram illustrating a cross-sectional structure of the body portion 2a of the pressure-sealed container 2 and a partial cross-sectional structure of the first tube expansion device 200a during the first tube expansion molding in the manufacturing process of the compressor 1 according to the first embodiment. FIG. In FIG. 22, the moving direction of the first rod portion 155 during the first tube expansion molding is indicated by a block arrow with a hatching line, and the first tube expansion die portion 140 in accordance with the movement of the first rod portion 155 is the first. The moving direction of the divided mold 140a is indicated by a white block arrow.

  21 and 22 has the same structure as that of the first tube expansion device 200a shown in FIGS. 11, 12, and 17. 21 and 22, the third outer surface portion 144 extending between the first outer surface portion 142 and the second outer surface portion 143 is configured to have a tapered shape. Has been. Further, the cross-sectional portion 144b of the third outer surface portion 144 of FIGS. 21 and 22 is obliquely directed from the linear cross-sectional portion 142b of the first outer surface portion 142 toward the linear cross-sectional portion 143b of the second outer surface portion 143. It can be configured to have an extending linear shape. 21 and 22, the first outer surface portion 142 of the first tube expansion mold portion 140 is disposed on the first casing portion 150 side. 21 and 22, the first hollow space portion 146 has a polygonal truncated pyramid-shaped space that decreases as the opening area of the first hollow space portion 146 increases from the first casing portion 150. It is configured as. 21 and 22, the insertion portion 158 of the first rod portion 155 is inserted into the first tube expansion mold portion 140 via the second hollow space portion 150a of the first casing portion 150. Is accommodated in the first hollow space 146.

  As shown in FIG. 21, the inner surface of the body portion 2 a of the pressure sealed container 2 is disposed so as to contact the first outer surface portion 142 of the first tube expansion mold portion 140. At the time of the first tube expansion molding, as shown in FIG. 22, the insertion portion 158 of the first rod portion 155 is changed from the second hollow space portion 150a to the first hollow space portion 146 by the pressing of the first rod portion 155 or the like. Move in a straight line. By the linear movement of the insertion portion 158 of the first rod portion 155, the outer side surface portion 158 a of the insertion portion 158 slides along the inner side surface portion 145 of the first tube expansion mold portion 140. When the outer side surface portion 158a of the insertion portion 158 slides along the inner side surface portion 145 of the first tube expansion mold portion 140, the first divided mold 140a of the first tube expansion mold portion 140 becomes the first divided mold. It moves in the direction of the outer surface 141a of 140a.

  When the first split mold 140a moves in the direction of the outer surface 141a of the first split mold 140a, the body portion 2a of the pressure sealed container 2 is expanded. Specifically, the inner diameter of the first inner side surface 2a1 of the body part 2a that contacts the first curved surface part 142a of the first split mold 140a is the inner diameter of the body part 2a of the pressure sealed container 2 in the finished product of the compressor 1. Tube expansion is performed until the dimensions are the same. In addition, the inner diameter of the second inner side surface 2a2 of the body portion 2a that contacts the second curved surface portion 143a of the first tube expanding mold portion 140 is larger than the inner diameter dimension of the body portion 2a of the pressure sealed container 2 in the finished product of the compressor 1. The tube is formed so as to be small. In addition, the third inner side surface 2a3 extending between the first inner side surface 2a1 and the second inner side surface 2a2 is expanded and formed into a tapered shape.

  In addition, it can avoid that the distortion of the internal diameter of the trunk | drum 2a of the pressure sealed container 2 becomes large by making the quantity of the 1st division mold 140a into an odd number. When the adjacent first split mold 140a contacts the inner side surface of the body part 2a of the pressure sealed container 2, a gap is formed between the adjacent first split molds 140a, and the first side surface of the body part 2a has the first side. A portion where the split mold 140a does not come into contact occurs. Although not shown in the drawing, convex protrusions are formed on the inner surface of the body part 2a where the adjacent first divided mold 140a does not contact, and distortion occurs in the inner diameter of the body part 2a. When the number of the first divided molds 140a is an even number, the convex protrusions are formed at positions facing the inner surface of the body part 2a, so that the distortion of the inner diameter of the body part 2a increases. On the other hand, when the number of the first divided molds 140a is an odd number, it is possible to avoid the formation of the convex protrusions at positions facing the inner surface of the body part 2a. An increase in the distortion of the inner diameter can be avoided.

  FIG. 23 is a schematic diagram showing the structure of the body portion 2a of the pressure-sealed container 2 during end face processing in the manufacturing process of the compressor 1 according to the first embodiment. As shown in FIG. 23, in the end surface processing of the body portion 2a of the pressure sealed container 2, the first peripheral portion 2a4 and the second peripheral portion 2a5 are cut by an end surface processing device such as a lathe. In addition, in FIG. 23, let the 1st peripheral part 2a4 be a terminal part by the side of the 1st inner surface 2a1 of the trunk | drum 2a of the pressure sealed container 2. As shown in FIG. Further, the second peripheral edge 2a5 is a terminal portion on the second inner side surface 2a2 side of the body portion 2a of the pressure-sealed container 2.

  The width between the first peripheral edge 2a4 and the second peripheral edge 2a5 of the body part 2a of the pressure sealed container 2 by the end face processing of the body part 2a of the pressure sealed container 2 is the pressure sealed container in the finished product of the compressor 1. It is processed so as to be the same as the width of the body part 2a.

  FIG. 24 shows the structure of the body portion 2a and the bottom portion 2b of the pressure sealed container 2 during circumferential welding and a part of the circumferential welding device 160 in the manufacturing process of the compressor 1 according to the first embodiment of the present invention. FIG. The bottom 2b of the pressure sealed container 2 is manufactured by plastic forming a plate member made of steel such as stainless steel or carbon steel. As shown in FIG. 24, the first inner side surface 2 a 1 of the body portion 2 a of the pressure sealed container 2 after end face processing is joined to the outer surface 2 b 1 of the bottom 2 b of the pressure sealed container 2 by a circumferential welding device 160.

  The circumferential welding device 160 can be configured as, for example, a resistance welding welding device such as projection welding or seam welding, or an arc welding welding device such as TIG welding. The circumferential welding device 160 includes a second welding torch 162 that performs welding between the first inner side surface 2a1 of the body portion 2a of the pressure sealed container 2 and the outer side surface 2b1 of the bottom portion 2b of the pressure sealed container 2. Further, although not shown in FIG. 24, the circumferential welding device 160 uses, for example, a welding power source that converts AC power supplied from a commercial AC power source into power used for welding, and a current flowing from the welding power source for welding. A welding transformer that amplifies and flows to the second welding torch 162. A second welding electrode 164 is attached to the distal end portion 162 a of the second welding torch 162. The second welding electrode 164 can be configured as, for example, a pure metal electrode such as a pure tungsten electrode or a pure molybdenum electrode, or an alloy electrode such as a copper chrome alloy electrode or a copper alumina alloy electrode. The gap between the first inner side surface 2a1 of the body portion 2a of the pressure sealed container 2 and the outer side surface 2b1 of the bottom portion 2b of the pressure sealed container 2 is sealed by welding by the circumferential welding device 160.

  The first inner side surface 2a1 of the body portion 2a of the pressure sealed container 2 and the outer side surface 2b1 of the bottom 2b of the pressure sealed container 2 are joined by welding, but may be joined by brazing or the like.

  After the circumferential welding, a suction hole 5 is formed in the body portion 2a of the pressure sealed container 2 by a drilling device such as a drill. Further, the connection pipe 6b and the ring 6c are joined to the suction hole 5 of the body part 2a by welding or brazing.

  In the body part 2a of the pressure-sealed container 2, distortion occurs in the inner diameter of the body part 2a due to the above-described perforation of the suction hole 5 and the joining of the connecting pipe 6b and the ring 6c by welding or brazing. Further, as described above, in the first tube expansion molding, a convex protrusion is formed on the inner surface of the body part 2a where the adjacent first split mold 140a does not contact, so that the inner diameter of the body part 2a is distorted. Has occurred.

  In the manufacturing process of the compressor 1 according to the first embodiment, tube expansion by the second tube expansion device 200b is performed in order to reduce the above-described distortion and make the inner diameter of the body portion 2a of the pressure sealed container 2 uniform. In the following description, pipe expansion molding by the second pipe expansion device 200b is referred to as “second pipe expansion molding”.

  FIG. 25 is a cross-sectional view schematically showing the structures of the body portion 2a and the bottom portion 2b of the pressure-sealed container 2 to be expanded by second tube expansion in the manufacturing process of the compressor 1 of the first embodiment. As shown in FIG. 25, a thermosetting portion 60 is formed by welding or the like between the first inner side surface 2a1 of the body portion 2a of the pressure sealed container 2 and the outer side surface 2b1 of the bottom portion 2b of the pressure sealed container 2. ing. The hardness of the thermosetting part 60 is higher than the other part of the trunk | drum 2a. Further, in FIG. 25, the third inner side surface 2 a 3 of the body portion 2 a of the pressure sealed container 2 is disposed adjacent to the peripheral edge 2 b 2 of the bottom 2 b of the pressure sealed container 2.

  FIG. 26 is a schematic diagram illustrating an example of an external structure of a part of the second tube expansion device 170 of the second tube expansion device 200b used in the second tube expansion molding in the manufacturing process of the compressor 1 according to the first embodiment. . FIG. 27 is a schematic view showing the internal structure of the second tube expanding device 170 of FIG.

  The 2nd pipe expansion instrument 170 is comprised as a jig | tool which comprises a part of 2nd pipe expansion apparatus 200b. As shown in FIG. 26, the second tube expansion instrument 170 is a second tube expansion mold portion 180 that performs the second tube expansion molding of the body portion 2 a of the pressure sealed container 2, and the second tube expansion mold portion 180 that supports the second tube expansion mold portion 180. And a casing part 190. The second tube expansion instrument 170 includes a second rod portion 195 that is reciprocally disposed inside the second tube expansion mold portion 180 and the second casing portion 190.

  The second tube expansion mold part 180 has a circumferential outer surface part 182. The second tube expansion mold part 180 includes a plurality of second divided molds 180 a arranged adjacent to the outer surface 182 of the second tube expansion mold part 180 in the circumferential direction. The second divided mold 180a has an arcuate curved surface portion 182a. It should be noted that, like the first split mold 140a of the first tube expansion mold part 140, the second split mold 180a can have the same shape. Similarly to the first divided mold 140a of the first tube expansion mold part 140, the number of the second divided molds 180a is an odd number, so that the distortion of the inner diameter of the body part 2a of the pressure sealed container 2 is reduced. An increase in size can be avoided.

  As shown in FIG. 27, a first hollow space portion 186 having a polygonal truncated pyramid shape surrounded by an inner side surface portion 184 of the second tube expansion mold portion 180 is provided inside the second tube expansion mold portion 180. . The inner side surface part 184 of the second tube expansion mold part 180 has a plurality of trapezoidal flat surface parts 184a which are the inner side surfaces of the second split mold 180a. The first hollow space 186 is configured as a polygonal frustum-shaped space by being surrounded by the flat surface 184a of the second divided mold 180a. In FIG. 27, the first hollow space portion 186 is configured as a polygonal frustum-shaped space that decreases as the opening area of the first hollow space portion 186 increases from the second casing portion 190.

  The second casing part 190 has a second hollow space part 190 a that communicates the external space of the second casing part 190 with the first hollow space part 186. For example, the second hollow space 190a can be a cylindrical space having an opening area larger than that of the first hollow space 186, for example.

  Although not shown in FIGS. 26 and 27, the second casing portion 190 is fixed to the support base of the second tube expansion device 200b in order to ensure the stability during the first tube expansion molding and the reliability in the first tube expansion molding. Has been. The shape of the 2nd casing part 190 should just be a shape which can be fixed to a support stand, for example, can be comprised so that it may have external appearance, such as a cube shape and a cylindrical shape.

  As shown in FIG. 26, the second rod portion 195 has a polygonal truncated pyramid shaped insertion portion 198 having a plurality of trapezoidal outer surface portions 198a. The number of trapezoidal outer surface portions 198a in the polygonal trapezoidal insertion portion 198 is the same as the number of the second divided mold 180a. In FIG. 26, the insertion part 198 of the second rod part 195 is accommodated in the first hollow space part 186 of the second tube expansion mold part 180 via the second hollow space part 190a of the second casing part 190. Yes. 26 and FIG. 27, the outer surface portion 182 of the second expanding device 170 in the finished product of the compressor 1 is pushed by pushing the insertion portion 198 of the second rod portion 195 toward the second expanding die portion 180. The inner diameter of the body portion 2a of the pressure sealed container 2 is expanded.

  FIG. 28 shows a cross-sectional structure of the body portion 2a and the bottom portion 2b of the pressure sealed container 2 and a part of the second tube expansion device 200b before the second tube expansion molding in the manufacturing process of the compressor 1 according to the first embodiment. It is the schematic which shows an example of a cross-sectional structure. FIG. 29 shows a cross-sectional structure of the body portion 2a and the bottom portion 2b of the pressure-sealed container 2 and a partial cross-sectional structure of the second tube expansion device 200b in the manufacturing process of the compressor 1 according to the first embodiment. It is the schematic which shows an example. In FIG. 29, the moving direction of the second rod portion 195 during the second tube expansion molding is indicated by a block arrow with a hatching line, and the second tube expansion die portion 180 of the second tube expansion die portion 180 accompanying the movement of the second rod portion 195 is shown. The moving direction of the divided mold 180a is indicated by a white block arrow.

  As shown in FIG. 28, the second inner side surface 2 a 2 and the third inner side surface 2 a 3 of the body portion 2 a of the pressure sealed container 2 are arranged so as to contact the outer side surface portion 182 of the second tube expansion mold portion 180. At the time of the second tube expansion molding, as shown in FIG. 29, the insertion portion 198 of the second rod portion 195 is changed from the second hollow space portion 190a to the first hollow space portion 186 by the pressing of the second rod portion 195 or the like. Move in a straight line. By the linear movement of the insertion portion 198 of the second rod portion 195, the outer side surface portion 198 a of the insertion portion 198 slides along the inner side surface portion 184 of the second tube expansion mold portion 180. The outer side surface portion 198a of the insertion portion 198 slides along the inner side surface portion 184 of the second tube expansion mold portion 180, whereby the second divided mold 180a of the second tube expansion mold portion 180 becomes the second divided mold. It moves in the direction of the curved surface portion 182a of 180a.

  When the second split mold 180a moves in the direction of the curved surface portion 182a of the second split mold 180a, the body portion 2a of the pressure sealed container 2 is expanded. The inner diameters of the second inner side surface 2a2 and the third inner side surface 2a3 of the body part 2a that are in contact with the curved surface part 182a of the second split mold 180a are the inner diameter dimensions of the body part 2a of the pressure sealed container 2 in the finished product of the compressor 1. Is expanded until it becomes the same, and the inner diameter becomes uniform.

  If the third inner side surface 2a3 of the body portion 2a of the pressure-sealed container 2 is not the same position as the position where the electric motor section 10 and the compression mechanism section 30 are arranged, the bottom portion 2b of the pressure-sealed container 2 is formed in the first tube expansion molding. You may form in positions other than the position adjacent to the peripheral edge 2b2. FIG. 30 is a schematic diagram illustrating another example of the cross-sectional structures of the body portion 2a and the bottom portion 2b of the pressure sealed container 2 before the second tube expansion molding in the manufacturing process of the compressor 1 of the first embodiment. . FIG. 31 is a schematic diagram illustrating another example of the cross-sectional structures of the body portion 2a and the bottom portion 2b of the pressure-sealed container 2 after the second tube expansion molding in the manufacturing process of the compressor 1 according to the first embodiment. is there. 30 and 31, the arrangement position of the third inner side surface 2a3 of the body portion 2a of the pressure sealed container 2 is illustrated by a dotted line segment B. Further, in FIG. 31, in order to schematically show an electric motor part fixing position 70 for fixing the electric motor part 10 and a compression mechanism part fixing position 80 for fixing the compression mechanism part 30 in the body part 2 a of the pressure sealed container 2. The electric motor unit 10 and the compression mechanism unit 30 are indicated by broken lines.

  As shown in FIGS. 30 and 31, even if the third inner side surface 2 a 3 of the body portion 2 a of the pressure sealed container 2 is formed at a position other than the position adjacent to the peripheral edge 2 b 2 of the bottom portion 2 b of the pressure sealed container 2. The second tube expansion mold part 180 can be formed by tube expansion so that the inner diameter of the pressure sealed container 2 becomes uniform. However, although not shown in FIGS. 30 and 31, distortion may remain on the inner surface of the pressure sealed container 2 even after the third inner surface 2 a 3 is expanded. Therefore, the third inner side surface 2a3 is formed away from the motor unit fixing position 70 and the compression mechanism unit fixing position 80, thereby more reliably avoiding the deterioration of the performance of the compressor 1 and the reliability of the compressor 1. Can be improved.

  In the manufacturing process of the compressor 1 of the first embodiment, the electric motor unit 10, the crankshaft 20, and the compression mechanism unit 30 are accommodated in the body unit 2a of the pressure sealed container 2 after the second tube expansion device 200b. The compression mechanism part 30 is joined to the inner surface of the body part 2a of the pressure sealed container 2 by arc welding such as arc spot welding or shrink fitting. Next, the electric motor unit 10 is joined to the inner side surface of the body portion 2a of the pressure sealed container 2 by shrink fitting or the like.

  In the manufacturing process of the compressor 1 according to the first embodiment, after the compression mechanism portion 30 and the electric motor portion 10 are joined, the lid portion 2c of the pressure sealed container 2 is connected to the body portion 2a of the pressure sealed container 2 by circumferential welding or the like. The second peripheral edge 2a5 is joined to the inner side surface. The lid portion 2c of the pressure sealed container 2 is manufactured by plastic forming a steel plate member such as stainless steel or carbon steel. In addition, in the lid part 2c of the pressure sealed container 2, the discharge pipe 7 and the glass terminal 8 are joined by welding such as resistance welding or brazing before joining to the body part 2a of the pressure sealed container 2. Yes. In addition, the glass terminal 8 and the coil wound around the stator 12 are electrically connected by the conductive wire 16 before being joined to the body portion 2 a of the pressure sealed container 2.

  The suction muffler 3 is attached to the outer surface of the pressure sealed container 2 after joining the lid 2c of the pressure sealed container 2 to the body 2a. Furthermore, the extension pipe 6a is joined to the connection pipe 6b by welding such as brazing or resistance welding, and the suction pipe 4 is joined to the connection pipe 6b by welding such as brazing or resistance welding. With the above, the manufacturing process of the compressor 1 of the first embodiment is completed.

  Next, the body portion 2a of the pressure sealed container 2 formed by the first tube expansion molding in the manufacturing process of the compressor 1 of the first embodiment and the body of the pressure sealed container 2 manufactured by the conventional first tube expansion molding. The part 2a is compared and examined with reference to FIGS.

  FIG. 32 is a schematic diagram illustrating an example of a cross-sectional structure of the body portion 2a of the pressure sealed container 2 and a partial cross-sectional structure of the first tube expansion device 200a before the first tube expansion molding in the manufacturing process of the conventional compressor 1. FIG.

  In the conventional first tube expansion molding, as the tube expansion device of the first tube expansion device 200a, one having a tube expansion mold portion having the outer circumferential surface portion 182 similar to the second tube expansion device 170 is used. In the following description of the conventional first tube expansion molding, the case where the second tube expansion device 170 is used as an example of the tube expansion device of the first tube expansion device 200a will be described. In addition, since the structure, operation | movement, etc. of the 2nd tube expansion instrument 170 are the same as that mentioned above, description is abbreviate | omitted.

  FIG. 33 is a schematic diagram illustrating an example of a cross-sectional structure of the body portion 2a of the pressure sealed container 2 and a partial cross-sectional structure of the first tube expansion device 200a during the first tube expansion molding in the manufacturing process of the conventional compressor 1. is there. In FIG. 33, the movement direction of the second rod portion 195 during the first tube expansion molding is indicated by a block arrow with a hatching line, and the second tube expansion mold portion 180 of the second tube expansion mold portion 180 accompanying the movement of the second rod portion 195 is shown. The moving direction of the divided mold 180a is indicated by a white block arrow.

  As shown in FIGS. 32 and 33, in the conventional first tube expansion molding, as the second rod portion 195 moves, the second divided mold 180a of the second tube expansion mold portion 180 is replaced with the second divided mold 180a. It moves in the direction of the curved surface portion 182a. When the second split mold 180a moves in the direction of the curved surface portion 182a of the second split mold 180a, the inner diameter of the body portion 2a of the pressure sealed container 2 is the same as that of the pressure sealed container 2 in the finished product of the compressor 1. Tube expansion is performed until the inner diameter of the body portion 2a is the same.

  In the conventional manufacturing process of the compressor 1, after the first tube expansion forming, the end face processing of the body part 2a of the pressure sealed container 2 and the bottom part of the pressure sealed container 2 are the same as in the manufacturing process of the compressor 1 of the first embodiment. Circumferential welding to the body portion 2a of 2b is performed. After the circumferential welding of the bottom 2b of the pressure-sealed container 2 to the body 2a, in the manufacturing process of the conventional compressor 1, the first tube expansion process similar to the manufacturing process of the compressor 1 of the first embodiment is performed. Is called.

  FIG. 34 shows an example of a cross-sectional structure of the body portion 2a and the bottom portion 2b of the pressure sealed container 2 and a partial cross-sectional structure of the second tube expansion device 200b before the second tube expansion molding in the manufacturing process of the conventional compressor 1. FIG. FIG. 35 shows an example of the cross-sectional structure of the body portion 2a and the bottom portion 2b of the pressure-sealed container 2 and the partial cross-sectional structure of the second tube expansion device 200b in the manufacturing process of the conventional compressor 1 during the second tube expansion molding. FIG. In FIG. 35, the movement direction of the second rod portion 195 during the second tube expansion molding is indicated by a block arrow with a hatching line, and the second tube expansion die portion 180 of the second tube expansion mold portion 180 accompanying the movement of the second rod portion 195 is shown. The moving direction of the divided mold 180a is indicated by a white block arrow.

  As shown in FIGS. 34 and 35, in the conventional second tube expansion molding, the second split mold 180a of the second tube expansion mold portion 180 is replaced with the second split mold 180a in accordance with the movement of the second rod portion 195. It moves in the direction of the curved surface portion 182a. When the second split mold 180a moves in the direction of the curved surface portion 182a of the second split mold 180a, the inner diameter of the body portion 2a of the pressure sealed container 2 is the same as that of the pressure sealed container 2 in the finished product of the compressor 1. Tube expansion is performed until the inner diameter of the body portion 2a is the same.

  FIG. 36 is a cross-sectional view schematically showing the structure of the body portion 2a and the bottom portion 2b of the pressure sealed container 2 after the second tube expansion molding in the manufacturing process of the conventional compressor 1. As shown in FIG. 36, between the inner surface of the body portion 2a of the pressure sealed container 2 on the first peripheral edge 2a4 side and the outer surface 2b1 of the bottom 2b of the pressure sealed container 2, thermosetting by welding or the like. A portion 60a is formed. Since the hardness of the thermosetting portion 60a is higher than the other portions of the body portion 2a, the body portion 2a of the pressure-sealed container 2 is formed in the direction from the thermosetting portion 60a to the second peripheral portion 2a5 by the second tube expansion molding. As a result, a tapered distortion portion 90 is generated. For example, when the inner diameter of the body portion 2a of the pressure-sealed container 2 is 100 mm, in the conventional manufacturing process of the compressor 1, the width in the inner diameter direction of the body portion 2a of the strain section 90 may be 20 to 30 μm. When the width in the inner diameter direction of the body portion 2a of the strained portion 90 is 20 μm or more, the compression mechanism portion 30 is fixed to the pressure-sealed container 2 in a distorted state, so that the performance of the compressor is lowered and the reliability of the compressor is reduced. Cause a drop.

  FIG. 37 shows the width of distortion of the body portion 2a of the pressure sealed container 2 after the second tube expansion molding in the manufacturing process of the conventional compressor 1, and the second tube expansion molding in the manufacturing process of the compressor 1 of the first embodiment. It is the graph which compared relatively with the width | variety of the trunk | drum 2a of the subsequent pressure sealed container 2. FIG. In FIG. 37, the width of the distortion after the second tube expansion molding in the manufacturing process of the conventional compressor 1 is based on the inner diameter of the body portion 2a of the pressure sealed container 2 of the finished product. The width of the distortion in the body portion 2a is shown by a triangular blot. In addition, the width of the distortion after the second tube expansion molding in the manufacturing process of the compressor 1 according to the first embodiment is based on the inner diameter of the body portion 2a of the pressure sealed container 2 of the finished product, as shown in FIG. The width of the strain on the second inner side surface 2a2 and the third inner side surface 2a3 of the second body part 2a is shown by a circular blot.

  Moreover, in FIG. 37, the position of the internal diameter of the trunk | drum 2a of the pressure sealed container 2 of a finished product is shown with the thick vertical line. Moreover, the position of the peripheral edge 2b2 of the bottom 2b of the pressure sealed container 2 is shown by a thick horizontal line. That is, the blot on the right side of the thick vertical line in the graph of FIG. 37 indicates the width of the distortion in the radial direction, and the blot below the thick horizontal line indicates the width of the distortion in the central axis direction.

  As shown in FIG. 37, at the position of the peripheral edge 2b2 of the bottom 2b of the pressure sealed container 2, the width of the radial strain after the second tube expansion molding of the first embodiment is the same as that after the conventional second tube expansion molding. Can be reduced to half or less of the width of the distortion. Accordingly, in the body portion 2a of the pressure sealed container 2 in the manufacturing process of the compressor 1 of the first embodiment, the distortion in the body portion 2a of the pressure sealed container 2 after the second tube expansion molding can be reduced. It is possible to avoid a decrease in the performance of the compressor 1 due to being fixed to the pressure sealed container 2 in a distorted state.

  Moreover, as shown in FIG. 37, the width of the radial strain after the second tube expansion molding of the first embodiment can be reduced to 60% or less of the width of the strain after the conventional second tube expansion molding. . Therefore, in the body part 2a of the pressure sealed container 2 in the manufacturing process of the compressor 1 according to the first embodiment, it is possible to reduce the occurrence of distortion in the body part 2a of the pressure sealed container 2 after the second tube expansion molding. In the body portion 2a of the pressure sealed container 2 in the manufacturing process of the compressor 1 according to the first embodiment, the compression mechanism section 30 is placed at a position adjacent to the bottom 2b of the pressure sealed container 2 by reducing the occurrence of distortion. Since it can be accommodated, the compressor 1 can be downsized.

  As described above, the compressor 1 of the first embodiment includes the compression mechanism unit 30 that compresses the refrigerant, the crankshaft 20 that transmits the rotational driving force to the compression mechanism unit 30, and the rotational drive to the crankshaft 20. An electric motor unit 10 for generating force, a cylindrical body part 2a, one end of the body part 2a, for example, a bottom part 2b joined to the first peripheral edge 2a4 side, and another end of the body part 2a, for example, a second And a lid portion 2c joined to the peripheral edge 2a5 side, accommodates the compression mechanism portion 30, the crankshaft 20, and the electric motor portion 10, and the compression mechanism portion 30 and the electric motor portion 10 are fixed to the body portion 2a. The body portion 2a has a smaller inner diameter than the first inner side surface 2a1 and the first inner side surface 2a1 by the first tube expansion molding performed before the bottom portion 2b is joined to the body portion 2a. A second inner surface 2a2, The second inner surface is formed by second tube forming performed after the first inner surface 2a1 and the third inner surface 2a3 extending between the inner surface 2a1 and the second inner surface 2a2 are formed and the bottom 2b is joined to the body portion 2a. 2a2 and the third inner side surface 2a3 are expanded to the inner diameter of the first inner side surface 2a1.

  Moreover, the manufacturing method of the compressor 1 of the first embodiment includes a cylindrical body portion 2a, one end of the body portion 2a, for example, a bottom portion 2b joined to the first peripheral edge portion 2a4 side, and the body portion 2a. It is a manufacturing method of the compressor 1 provided with the pressure sealed container 2 which has the other end, for example, the cover part 2c joined to the 2nd peripheral part 2a5 side, Comprising: Before the bottom part 2b is joined to the trunk | drum 2a, The first inner surface 2a1, the second inner surface 2a2 having a smaller inner diameter than the first inner surface 2a1, and the third inner surface 2a3 extending between the first inner surface 2a1 and the second inner surface 2a2. After the first tube expansion forming step to be formed on the body portion 2a and the bottom portion 2b are joined to the body portion 2a, the second inner side surface 2a2 and the third inner side surface 2a3 are expanded to the inner diameter of the first inner side surface 2a1. A second tube expansion forming step.

  The first tube expansion device 130 which is the tube expansion device of the first embodiment is a first tube expansion device 130 for manufacturing the pressure sealed container 2 of the compressor 1, and has a cylindrical first outer surface portion 142 and the first tube expansion device 130. A tube-expansion mold having a second outer surface portion 143 having a smaller circumferential radius than the first outer surface portion 142 and a third outer surface portion 144 extending between the first outer surface portion 142 and the second outer surface portion 143. A first expansion die part 140 that is a part, a first casing part 150 that is a casing part that supports the first expansion mold part 140, and a reciprocation inside the first expansion die part 140 and the first casing part 150. A first rod portion 155 that is a rod portion that is freely arranged, and the first tube expansion die portion 140 is disposed adjacent to the circumferential direction of the first tube expansion die portion 140, and the first rod portion 155. The circumferential surface of the first expansion mold part 140 with the movement of A plurality of first split molds 140a that move in the direction, each of the first split molds 140a having a first curved surface part 142a having an arcuate surface shape constituting the first outer surface part 142, and a second outer surface part. The second curved surface portion 143a having an arcuate surface shape that configures 143 and the third outer surface portion 144, and a connecting surface portion 144a that extends between the first curved surface portion 142a and the second curved surface portion 143a.

  According to the configuration of the first embodiment, in the first tube expansion molding, the body portion 2a includes the first inner side surface 2a1, the second inner side surface 2a2 having a smaller inner diameter than the first inner side surface 2a1, and the first inner side surface. A third inner side surface 2a3 extending between 2a1 and the second inner side surface 2a2 can be formed. Thereafter, by performing the second tube expansion molding, the distortion of the body portion 2a can be reduced, so that the compression mechanism portion 30 can be prevented from being fixed to the pressure sealed container 2 in a distorted state. Therefore, according to the present invention, the compressor 1 capable of avoiding deterioration in performance and securing reliability due to the compression mechanism portion 30 being fixed to the pressure sealed container 2 in a distorted state, and manufacture of the compressor 1 It is possible to provide a method and a first tube expanding device 130 for manufacturing the pressure-sealed container 2.

  In the compressor 1 and the method for manufacturing the compressor 1 according to the first embodiment, the third inner side surface 2a3 includes the compression mechanism portion fixing position 80, which is a fixing position with the compression mechanism portion 30 in the body portion 2a, and the electric motor. It can be formed at a position separated from the motor unit fixing position 70 which is a fixing position with the unit 10. According to the above-described configuration, it is possible to more reliably avoid a decrease in the performance of the compressor 1 and improve the reliability of the compressor 1.

  Further, in the compressor 1 and the manufacturing method of the compressor 1 according to the first embodiment, the third inner side surface 2a3 is positioned adjacent to the joining position with the bottom 2b in the body 2a, that is, the bottom of the pressure sealed container 2. It is formed at a position adjacent to the peripheral edge 2b2 of 2b. According to the above-described configuration, the compression mechanism 30 can be accommodated at a position adjacent to the bottom 2b of the pressure sealed container 2, so that the compressor 1 can be downsized.

  Moreover, in the 1st tube expansion instrument 130 of this Embodiment 1, a tube expansion mold part can be comprised with an odd number of division molds. According to the above-described configuration, it is possible to avoid the formation of the convex protrusions generated when the body part 2a is expanded at the position facing the inner side surface of the body part 2a, so that the distortion of the inner diameter of the body part 2a is large. Can be avoided.

Other embodiments.
The present invention is not limited to the first embodiment described above, and various modifications can be made without departing from the gist of the present invention. For example, the first welding torch 122 that performs butt welding may have the same structure as the second welding torch 162 that performs circumferential welding, or may have a different structure.

  Further, the first casing portion 150 and the first rod portion 155 of the first tube expanding device 130 may have the same structure as the second casing portion 190 and the second rod portion 195 of the second tube expanding device 170. , May have a different structure.

  Moreover, the compressor 1 of the above-mentioned Embodiment 1 is refrigeration cycle apparatuses, such as an air conditioner water heater, a refrigerator, a vending machine, a humidifier, a dehumidifier, a dryer, a showcase, a washing dryer, etc., for example. It can be used.

  DESCRIPTION OF SYMBOLS 1 Compressor, 2 Pressure sealed container, 2a Body part, 2a1 1st inner surface, 2a2 2nd inner surface, 2a3 3rd inner surface, 2a4 1st peripheral part, 2a5 2nd peripheral part, 2b Bottom part, 2b1 outer surface, 2b2 peripheral edge, 2c lid, 3 suction muffler, 3a housing, 3b inflow pipe, 4 suction pipe, 5 suction hole, 6 fixing member, 6a extension pipe, 6b connection pipe, 6c ring, 7 discharge pipe, 8 glass terminal DESCRIPTION OF SYMBOLS 10 Electric motor part, 12 Stator, 14 Rotor, 16 Conductor, 20 Crankshaft, 20a Fixed surface, 24 Eccentric part, 26 Piston, 30 Compression mechanism part, 31 Cylinder, 31a Hollow disk surface, 31b Inner side surface, 31c External surface, 32 vane, 32a tip, 32b end, 33 elastic body, 34 upper bearing, 34a fixed part, 34b bearing part, 35 lower bearing, 35a Fixed portion, 35b Bearing portion, 40 Refrigerator oil, 50 Steel plate, 52 Plate-like surface portion, 52a First plate-like surface portion, 52b Second plate-like surface portion, 54a First edge portion, 54b Second edge portion, 56a Third Edge part, 56b Fourth edge part, 60 thermosetting part, 60a thermosetting part, 70 motor part fixing position, 80 compression mechanism part fixing position, 90 distortion part, 100 roll device, 100a first roller, 100b second Roller, 100c Third roller, 110 Contraction device, 112 First contraction die, 112a First groove, 114 Second contraction die, 114a Second groove, 120 Butt welding device, 122 First welding torch, 122a Tip part, 124 1st welding electrode, 130 1st tube expansion instrument, 140 1st tube expansion die part, 140a 1st division mold, 141 outside surface part, 141a outside surface, 142 1st outside Surface portion, 142a first curved surface portion, 142b cross section, 143 second outer surface portion, 143a second curved surface portion, 143b cross section, 144 third outer surface portion, 144a connection surface portion, 144b cross section, 145 inner surface portion, 145a plane portion, 146 1st hollow space part, 150 1st casing part, 150a 2nd hollow space part, 155 1st rod part, 158 insertion part, 158a outer side surface part, 160 circumferential welding apparatus, 162 2nd welding torch, 162a tip part, 164 2nd welding electrode, 170 2nd tube expansion instrument, 180 2nd tube expansion mold part, 180a 2nd division mold part, 182 Outer side surface part, 182a Curved surface part, 184 Inner side surface part, 184a Plane part, 186 1st hollow space part 190 second casing part, 190a second hollow space part, 195 second rod part, 198 insertion part, 198a Outer side surface, 200a 1st tube expansion device, 200b 2nd tube expansion device, 310 hollow portion, 310a low pressure space portion, 310b high pressure space portion, 312 suction passage, 314 discharge passage, 316 vane groove, 318 vane groove opening, 319 opening Department.

Claims (8)

A compression mechanism for compressing the refrigerant;
A crankshaft that transmits a rotational driving force to the compression mechanism;
An electric motor section for generating a rotational driving force on the crankshaft;
A cylindrical body part; a bottom part joined to one end of the body part; and a lid part joined to the other end of the body part; the compression mechanism part, the crankshaft, and the motor part A pressure sealed container in which the compression mechanism part and the electric motor part are fixed to the body part,
By the first tube expansion molding performed before the bottom portion is joined to the body portion, the body portion includes a first inner surface, a second inner surface having a smaller inner diameter than the first inner surface, and the first A third inner surface extending between the inner surface and the second inner surface is formed;
A compressor in which the second inner surface and the third inner surface are expanded to the inner diameter of the first inner surface by second tube expansion performed after the bottom portion is joined to the body portion. 2. The compressor according to claim 1, wherein the third inner surface is formed at a position separated from a fixed position of the body portion with the compression mechanism portion and a fixed position with the electric motor portion. The compressor according to claim 1 or 2, wherein the third inner surface is formed at a position adjacent to a joining position of the body portion with the bottom portion. A method of manufacturing a compressor including a pressure-tight container having a cylindrical body part, a bottom part joined to one end of the body part, and a lid part joined to the other end of the body part,
Before the bottom portion is joined to the body portion, the first inner surface, the second inner surface having a smaller inner diameter than the first inner surface, and between the first inner surface and the second inner surface. A first tube expansion forming step of forming an extended third inner surface on the body portion;
A method of manufacturing a compressor comprising: a second tube expansion molding step of expanding the second inner surface and the third inner surface to the inner diameter of the first inner surface after the bottom portion is joined to the body portion. . The compressor includes a compression mechanism unit that compresses a refrigerant, and an electric motor unit that generates a rotational driving force on a crankshaft that transmits the rotational driving force to the compression mechanism unit,
In the pressure-tight container, the compression mechanism part and the electric motor part are accommodated,
The compression mechanism part and the electric motor part are fixed to the body part,
5. The method for manufacturing a compressor according to claim 4, wherein the third inner surface is formed at a position spaced apart from a fixed position with the compression mechanism section and a fixed position with the electric motor section in the body section. The method for manufacturing a compressor according to claim 4 or 5, wherein the third inner side surface is formed at a position adjacent to a joining position of the body portion with the bottom portion. A tube expansion device for manufacturing a pressure-sealed container,
A cylindrical first outer surface portion, a second outer surface portion having a smaller circumferential radius than the first outer surface portion, and a third outer surface portion extending between the first outer surface portion and the second outer surface portion. An expanded mold part having
A casing part for supporting the tube expansion mold part;
A rod portion reciprocally disposed in the tube expansion mold portion and the casing portion;
The pipe expansion mold part is provided adjacent to the circumferential direction of the pipe expansion mold part, and includes a plurality of divided molds that move in the circumferential surface direction of the pipe expansion mold part as the rod part moves. And
Each of the split molds includes a first curved surface portion having an arcuate surface shape constituting the first outer surface portion, a second curved surface portion having an arcuate surface shape constituting the second outer surface portion, and the third outer surface portion. A tube expanding instrument configured and having a connecting surface portion extending between the first curved surface portion and the second curved surface portion. The tube expansion instrument according to claim 7, wherein the tube expansion mold section includes an odd number of the divided molds.

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