JP5535511B2 - Method for manufacturing hermetic fluid machine and hermetic fluid machine - Google Patents

Description

  The present invention relates to a method for manufacturing a hermetic fluid machine in which a plurality of sets of fluid machines are fixedly installed in a hermetic container via a support member and connected via a common rotating shaft, and to a hermetic fluid machine. .

  As a closed type fluid machine in which multiple sets of fluid machines are fixedly installed in an airtight container, a multistage expander in which multiple sets of fluid machines are used as expanders, and an expansion in which fluid machines are used as expanders and compressors, respectively. There are known a compressor-integrated compressor, a multi-stage compressor in which the fluid machine is a low-stage compressor and a high-stage compressor, respectively, a multi-cylinder compressor in which the fluid machine is a compressor, and the like. In these sealed fluid machines, generally, a plurality of sets of fluid machines (expanders, compressors, etc.) are fixedly installed in a sealed container at a predetermined interval in the vertical direction, and an electric motor is installed between them. The electric motors are coupled to each other via a common rotating shaft coupled to the rotor of the electric motor (see, for example, Patent Documents 1 to 3).

  In the above-described closed type fluid machine, each fluid machine is fixed to the sealed container by supporting members such as bearing members and cylinder members that are constituent members of each fluid machine at a plurality of positions on the circumference with respect to the sealed container. In general (for example, 3 to 4 locations), a method of fixing and installing from the outer peripheral side by welding (plug welding) or caulking is generally employed.

JP 2008-163894 A (see FIG. 2) JP 2008-163938 A (see FIG. 2) JP 2009-19591 A (see FIG. 1)

  However, in the above-described sealed fluid machine, two or more sets of fluid machines are provided in the sealed container at a predetermined interval, so that the shaft length of the rotating shaft coupled therebetween becomes long, and the shaft core is easily displaced. There is a problem of becoming. In particular, in a case where a plurality of sets of fluid machines are fixedly installed in a sealed container by welding (plug welding) or caulking, there is a tendency that the misalignment of the shaft core becomes remarkable due to thermal distortion during welding and distortion during caulking. For this reason, there existed a problem that an assembly precision fell and it had influence on the performance of each fluid machine.

  The present invention has been made in view of such circumstances, and reduces or prevents misalignment of the shaft core even when the shaft length of the rotating shaft becomes long, and assembles a plurality of sets of fluid machines with high performance. It is an object of the present invention to provide a method for manufacturing a hermetic fluid machine and a hermetic fluid machine.

In order to solve the above-described problems, the method for manufacturing a sealed fluid machine and the sealed fluid machine of the present invention employ the following means.
That is, in the method for manufacturing a hermetic fluid machine according to the present invention, a plurality of sets of fluid machines are fixedly installed in a hermetic container at predetermined intervals by welding or caulking, respectively. Are connected via a common rotating shaft, the first fluid machine which is one of the plurality of sets of fluid machines is a rotary fluid machine, and the support thereof A clearance between the member and the inner periphery of the sealed container is S1, and the other second fluid machine is a scroll fluid machine, and the space between the support member and the inner periphery of the sealed container is When the gap is S2, S1> S2, and the support member of the scroll type fluid machine, which is the second fluid machine in which the gap S2 is reduced, is fixedly installed in the sealed container first. After, the gap S1 Said support member is said is larger first fluid machine wherein the rotary fluid machine fixedly mounted to the closed container, characterized in that assembling the plurality of sets of the fluid machine.

According to the present invention, the rotary fluid machine is supported as a first fluid machine that is one of a plurality of sets of fluid machines that are fixedly installed in a sealed container by welding or caulking at a predetermined interval. The clearance between the member and the inner periphery of the sealed container is S1, and the clearance between the support member of the scroll fluid machine that is the second fluid machine that is the other and the inner periphery of the sealed container is S2. Then, S1> S2 is satisfied, and after the support member of the scroll type fluid machine , which is the second fluid machine in which the gap S2 is reduced, is fixedly installed in the sealed container first, the gap S1 is enlarged. Since the support member of the rotary fluid machine , which is the first fluid machine, is fixedly installed in the sealed container so as to assemble a plurality of sets of fluid machines, a common rotating shaft for connecting the plurality of sets of fluid machines. Even if the shaft length becomes longer, it is supported first After fixing installed second fluid machine and has been scroll fluid machine of support members gap S2 is smaller in a sealed container between the inner circumference of the timber and the closed container, the support member and the sealing of the container A support member of a rotary fluid machine , which is a first fluid machine having a large gap S1 between the circumference, can be fixedly installed in a sealed container while adjusting the axis using the large gap S1. it can. Therefore, it is possible to reduce or prevent the deviation of the axis of the rotating shaft, which increases the axial length, and to assemble a plurality of sets of fluid machines with high accuracy and improve performance.

Furthermore, the manufacturing method of the hermetic fluid machine according to the present invention is the method of manufacturing a hermetic fluid machine, wherein the electric motor is fixedly installed between the plurality of sets of fluid machines fixedly installed in the hermetic container. The rotary fluid machine , which is the first fluid machine, is fixed on one side of the electric motor, and the scroll fluid machine , which is the second fluid machine, is fixedly installed on the other side. A set of fluid machines is assembled.

According to the present invention, after an electric motor is fixedly installed between a plurality of sets of fluid machines fixedly installed in an airtight container, the rotary fluid is a first fluid machine on one side of the electric motor. Since the scroll fluid machine , which is the second fluid machine, is fixedly installed on the other side of the machine and the plurality of sets of fluid machines are assembled, an electric motor is installed between the plurality of sets of fluid machines. For a hermetic fluid machine in which a plurality of sets of fluid machines can be driven by a common rotating shaft by an electric motor, the supporting members of the first and second fluid machines are respectively sealed by adjusting their axis. It can be fixed in a container. Therefore, by providing the electric motor between the plurality of sets of fluid machines, it is possible to reduce or prevent the deviation of the axis of the rotary shaft, which has a long shaft length, and to assemble the plurality of sets of fluid machines with high accuracy.

Further, a manufacturing method of a closed type fluid machine of the present invention is the manufacturing method of the sealed fluid machine, the first fluid machine wherein the rotary fluid machine installed in one side across said electric motor is a, the support member for fixing installed the rotary type fluid machine in the closed container is characterized in that it is an upper bearing.

According to the present invention, the first fluid machine installed on one side of the electric motor is a rotary fluid machine, and the support member for fixing and installing the rotary fluid machine in the hermetic container is the upper bearing. Therefore, the support member for supporting the rotary fluid machine , which is the first fluid machine, and the support for supporting the second fluid machine, compared to the rotary fluid machine fixed to the sealed container by the cylinder member. The distance between the supporting members between the members can be reduced. Therefore, the centering property between the two support members can be improved, and the assembly accuracy of a plurality of sets of fluid machines can be further improved.

Furthermore, in the sealed fluid machine according to the present invention, a plurality of sets of fluid machines are fixedly installed in the sealed container at predetermined intervals by welding or caulking, respectively, and each fluid machine is common. In a closed fluid machine connected via a rotary shaft, a first fluid machine that is one of the plurality of sets of fluid machines is a rotary fluid machine, and the support member and the sealed container are When the clearance between the inner periphery is S1 and the other second fluid machine is a scroll fluid machine, and the clearance between the support member and the inner periphery of the sealed container is S2. , S1> S2.

According to the present invention, the rotary fluid machine is supported as a first fluid machine that is one of a plurality of sets of fluid machines that are fixedly installed in a sealed container by welding or caulking at a predetermined interval. The clearance between the member and the inner periphery of the sealed container is S1, and the clearance between the support member of the scroll fluid machine that is the second fluid machine that is the other and the inner periphery of the sealed container is S2. In this case, since S1> S2, the clearance S2 between the support member and the inner periphery of the sealed container is first set even if the shaft length of the common rotating shaft that connects a plurality of sets of fluid machines becomes longer. After the support member of the scroll type fluid machine , which is the second fluid machine that has been reduced, is fixedly installed in the sealed container, the gap S1 between the support member and the inner periphery of the sealed container is increased. the support member sealing capacity of the fluid machine and have been rotary fluid machine By fixedly installed within, it is possible to fix installing a first fluid machine and has been a rotary fluid machine of the support member while adjusting the axis with a large gap S1 in a sealed container. Therefore, it is possible to reduce or prevent the deviation of the axis of the rotating shaft, which increases the axial length, and to assemble a plurality of sets of fluid machines with high accuracy and improve performance.

Furthermore, the hermetic fluid machine of the present invention is the above-mentioned hermetic fluid machine, wherein an electric motor is fixedly installed between the plurality of sets of fluid machines that are fixedly installed in the sealed container at a predetermined interval. The rotary fluid machine that is the first fluid machine is fixed on one side of the electric motor, and the scroll fluid machine that is the second fluid machine is fixedly installed on the other side. Features.

According to the present invention, an electric motor is fixedly installed between a plurality of sets of fluid machines fixedly installed in a sealed container at a predetermined interval, and the first fluid machine and one side are sandwiched between the electric motors. Since the rotary fluid machine and the scroll fluid machine , which is the second fluid machine on the other side, are fixedly installed, an electric motor is installed between the plurality of fluid machines. Also, for fluid machines in which a plurality of sets of fluid machines can be driven by a common rotating shaft by the electric motor, the support members of the first and second fluid machines are respectively sealed by adjusting their axis It can be fixed in a container. Therefore, by providing the electric motor between the plurality of sets of fluid machines, it is possible to reduce or prevent the deviation of the axis of the rotary shaft, which has a long shaft length, and to assemble the plurality of sets of fluid machines with high accuracy.

Furthermore, the hermetic fluid machine according to the present invention is the above-described hermetic fluid machine, wherein the rotary fluid machine as the first fluid machine is a low-stage compressor, the second fluid machine , The scroll fluid machine is a high-stage compressor, and the intermediate-pressure gas discharged into the hermetic container by being compressed by the low-stage compressor is sucked by the high-stage compressor. Thus, a multi-stage compressor that compresses to a high pressure is configured.

According to the present invention, the rotary fluid machine that is the first fluid machine is the low-stage compressor, and the scroll fluid machine that is the second fluid machine is the high-stage compressor, and the low-stage compression is Since the multi-stage compressor is configured to suck the intermediate-pressure gas discharged into the sealed container by the compressor into the high-stage compressor and compress it to a high pressure, a plurality of sets of low-stage compressors and Even in a multi-stage compressor in which the high-stage compressor is driven through a common rotating shaft and the axial length thereof becomes long, the shaft cores of the support members of the low-stage compressor and the high-stage compressor are adjusted respectively. Can be fixed in a closed container. Therefore, it is possible to reduce or prevent the misalignment of the common rotating shaft with a long shaft length, and to assemble a plurality of sets of low-stage and high-stage compressors with high accuracy and to improve the performance of the multistage compressor.

Further, the sealed type fluid machine of the present invention, in a closed type fluid machine described above, the upper bearing of the rotary fluid machine and has been the low-stage compressor, the low-stage compressor into the closed vessel The support member is fixedly installed.

According to the present invention, the upper bearing of the low-stage compressor is a rotary fluid machine, since it is a support member for fixing and supporting the low-stage compressor in a sealed container, a rotary fluid machine Compared to a fixed low-stage compressor fixed to a sealed container with a cylinder member, a support member that supports a low-stage compressor that is a rotary fluid machine and a high-stage compression that is a scroll fluid machine The distance between the support members between the support members supporting the machine can be reduced. Therefore, the centering property between the two support members can be improved, and the assembly accuracy of a plurality of sets of fluid machines can be further improved.

According to the present invention, the second fluid in which the gap S2 between the support member and the inner periphery of the hermetic container is reduced even if the shaft length of the common rotating shaft that connects a plurality of sets of fluid machines becomes longer. After the support member of the scroll type fluid machine that is a machine is fixedly installed in the sealed container, the rotary type is the first fluid machine in which the gap S1 between the support member and the inner periphery of the sealed container is increased. Since the support member of the fluid machine can be fixedly installed in the sealed container while adjusting the shaft center using the large gap S1, the shaft core misalignment of the rotating shaft that increases the shaft length can be reduced or prevented. A set of fluid machines can be assembled with high precision and high performance.

1 is a longitudinal sectional view of a hermetic fluid machine according to a first embodiment of the present invention. FIG. 2 is a partially enlarged view of the hermetic fluid machine shown in FIG. 1.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a longitudinal sectional view of a hermetic fluid machine 1 according to the first embodiment of the present invention. Here, an example of the hermetic fluid machine 1 in which a plurality of sets of fluid machines are provided inside the hermetic container will be described using a hermetic multistage compressor (hermetic fluid machine) 1. The hermetic multistage compressor 1 according to this embodiment includes a hermetic container 2 including an intermediate housing 3, an upper housing 4, and a lower housing 5. The housings 3, 4, and 5 constitute an airtight container 2 by integrally welding the upper housing 4 and the lower housing 5 to the upper and lower ends of the intermediate housing 3. The lower housing 5 is provided with a plurality of installation legs 6.

  An electric motor 7 including a stator 8 and a rotor 9 is fixedly installed in the center of the intermediate housing 3 by being press-fitted into the intermediate housing 3. A lower end portion of the rotor 9 of the electric motor 7 is connected to a low-stage compressor 20 that constitutes a first fluid machine described below, and an upper-end compressor that constitutes a second fluid machine that will be described later. A common rotating shaft 10 for a plurality of sets of fluid machines, which are extended in the vertical direction so as to be connected to 30, is coupled.

  On one side (lower side) of the electric motor 7, a low-stage compressor (first fluid machine) 20 constituting a first fluid machine that is one of a plurality of fluid machines is provided. Yes. The low-stage compressor 20 is provided in a cylinder member 21 forming a cylinder chamber, a pair of upper bearing 22 and lower bearing 23 installed on the upper and lower surfaces of the cylinder member 21, and a lower portion of the rotary shaft 10. The rotary compressor (rolling piston compressor) is configured to include a rotor 24 and the like that are fitted to the crank portion 10A and rotate around the cylinder chamber by rotation of the rotary shaft 10.

  The above-described low-stage compressor (rotary compressor) 20 may be a known one, and is circumferentially provided at a lower portion of the intermediate housing 3 via an upper bearing 22 that constitutes a support member for the sealed container 2. It is fixedly installed by welding (or caulking) at a plurality of places, for example, three places from the outer peripheral side by plug welding 25. The low-stage compressor (rotary compressor) 20 is configured to compress low-pressure refrigerant gas sucked from the outside through a suction pipe to an intermediate pressure and then discharge it into the hermetic container 2.

  Further, on the other side (upper side) of the electric motor 7, a high-stage compressor (second fluid machine) 30 constituting a second fluid machine that is another one of the plurality of sets of fluid machines. Is provided. The high-stage compressor 30 is fitted to a bearing member 31, a fixed scroll 32 fixed to the bearing member 31, and a crank pin 10 </ b> B provided at the upper end of the rotary shaft 10. The scroll compressor is configured to be engaged with the fixed scroll 32 to form a compression chamber, and to be constituted by a revolving scroll 33 or the like that is driven to revolve around the fixed scroll 32 by the rotation of the rotary shaft 10.

  The high-stage compressor (scroll compressor) 30 may be a well-known compressor, and is circumferentially provided at an upper portion of the intermediate housing 3 via a bearing member 31 that constitutes a support member for the sealed container 2. It is fixedly installed by welding (or caulking) at a plurality of places, for example, three places from the outer peripheral side by plug welding 35. The high-stage compressor (scroll compressor) 30 sucks the intermediate-pressure refrigerant gas discharged from the low-stage compressor (rotary compressor) 20 into the sealed container 2 and compresses it to a high pressure. After that, it is configured to discharge into the discharge chamber 36 which is partitioned in the upper housing 4 via a discharge cover (not shown) and the like, and to send it out.

  In the above-described hermetic multistage compressor (sealed fluid machine) 1, a low stage compressor (rotary compressor) 20 that is a first fluid machine and a high stage compressor (scroll) that is a second fluid machine. When manufacturing the hermetic multistage compressor 1 by fixing the compressor 30) in the hermetic container 2 (intermediate housing 3), the axial misalignment of the rotary shaft 10 with a long shaft length is reduced or In order to prevent this, as shown in FIG. 2, the clearance between the upper bearing 22 as the respective support member and the inner periphery of the sealed container 2 (intermediate housing 3) is S1, and the bearing member 31 and the sealed container 2 (intermediate) When the gap between the inner periphery of the housing 3) is S2, S1> S2.

  At the time of manufacturing, first, the bearing member 31 of the high-stage compressor 30 which is the second fluid machine in which the gap S2 is reduced is fixedly installed in the sealed container 2 by plug welding 35 (or caulking), and then the gap The upper bearing 22 of the low-stage compressor 20, which is the first fluid machine having a large S1, is adjusted by plug welding 25 (or caulking) in the hermetic container 2 while adjusting the shaft core using a large gap S1. By fixedly installing, the high stage compressor 30 and the low stage compressor 20 are sequentially assembled. The gaps S1 and S2 are, for example, such that the smaller gap S2 is about 0.1 mm and the larger gap S1 is about twice the gap S2.

With the configuration described above, according to the present embodiment, the following operational effects can be obtained.
As described above, the hermetic multistage compressor (sealed fluid machine) 1 according to the present embodiment has the electric motor 7 installed in the center of the hermetic container 2 and the first stage is a low stage that is the first fluid machine. Since the side compressor 20 and the high-stage compressor 30 that is the second fluid machine are provided, the axial length of the rotary shaft 10 that is a common shaft for connecting both is increased, and the shaft core thereof is increased. This tendency is prominent, and the tendency is prominent because it is affected by welding or caulking of the upper bearing 22 and the bearing member 31 that are support members.

  However, in this embodiment, a low-stage compressor (first fluid) which is one of a plurality of sets of fluid machines fixedly installed in the sealed container 2 by plug welding 25, 35 or caulking at a predetermined interval. The clearance between the upper bearing (supporting member) 22 of the machine 20 and the inner periphery of the sealed container 2 is S1, and the bearing member (supporting) of the high-stage compressor (second fluid machine) 30 which is the other one. Member) 31 and when the clearance between the inner periphery of the sealed container 2 is S2, S1> S2 is set, and the bearing member 31 of the high-stage compressor 30 in which the gap S2 is reduced is first sealed container. The upper bearing 22 of the low-stage compressor 20 having a large gap S1 is fixedly installed in the sealed container 2 by plug welding 25 or caulking. Low stage compressor 20 and high stage compressor 3 which are fluid machines So that assembling.

  For this reason, even if the axial length of the common rotating shaft connecting the low-stage compressor 20 and the high-stage compressor 30 is increased, the gap S2 between the inner periphery of the sealed container 2 is reduced first. The low-stage compressor 20 in which the clearance S1 between the inner periphery of the hermetic container 2 is increased after the bearing member 31 that is a support member of the higher-stage compressor 30 is fixedly installed in the hermetic container 2. The upper bearing 22 that is a support member of the above can be fixedly installed in the hermetic container 2 while adjusting the shaft core using the large gap S1. Therefore, the axial misalignment of the rotary shaft 10 with a long shaft length is reduced or prevented, and the low-stage compressor 20 and the high-stage compressor 30 which are a plurality of sets of fluid machines are assembled with high accuracy, and the high performance is achieved. Can be

  In particular, the low-stage compressor 20 constituting the first fluid machine is a rotary compressor, and the support member that fixes and installs the rotary compressor 20 in the sealed container 2 is the upper bearing 22. Compared with the rotary compressor 20 fixed to the hermetic container 2 by the cylinder member 21, the upper bearing 22 that supports the low-stage compressor 20 and the bearing member 31 that supports the high-stage compressor 30. The distance between the support members can be reduced. Thereby, the centering property between the upper bearing 22 and the bearing member 31 can be improved, and the assembly accuracy of the low-stage compressor 20 and the high-stage compressor 30 which are a plurality of sets of fluid machines can be further improved.

  The first fluid machine is a low-stage compressor 20, the second fluid machine is a high-stage compressor 30, and a hermetic multistage compressor (sealed fluid machine) 1 is configured, and the lower-stage compressor The intermediate-pressure gas discharged into the sealed container 2 by being compressed by the compressor 20 is sucked by the high-stage compressor 30 and compressed to a high pressure. Even in the hermetic multistage compressor 1 in which the stage side compressors 20 and 30 can be driven through the common rotating shaft 10 and the shaft length thereof is increased, the misalignment of the axis of the common rotating shaft 10 is reduced or prevented. In addition, the hermetic multistage compressor 1 can be improved in performance by assembling the low-stage and high-stage compressors 20 and 30 with high accuracy.

  Further, since the low-stage compressor 20 is a rotary compressor and the high-stage compressor 30 is a scroll compressor, the compressor is compressed by the low-stage rotary compressor and discharged into the sealed container 2. The intermediate pressure gas can be sucked and compressed to a high pressure by a scroll compressor on the higher stage side. This makes it possible to compensate for the weaknesses of the rotary compressor, such as increased compression leakage at high differential pressure, and to compensate for the weaknesses of the scroll compressor, such as an increase in outer diameter when attempting to secure the high displacement. And a high-performance hermetic multistage compressor 1 can be obtained.

[Other Embodiments]
Next, another embodiment of the present invention will be described below.
(1) In the first embodiment described above, the clearance between the upper bearing (support member) 22 of the low-stage compressor 20 that is the first fluid machine and the inner periphery of the sealed container 2 is defined as S1, When the clearance between the bearing member (support member) 31 of the high-stage compressor 30 that is a fluid machine and the inner periphery of the sealed container 2 is S2, S1> S2 is set, and the clearance S2 is reduced. The bearing member 31 of the high-stage compressor 30 is first fixedly installed in the sealed container 2 by plug welding 35 or caulking. On the contrary, S1 <S2 is set and the gap S1 is reduced. The upper bearing 21 of the lower-stage compressor 20 may be fixedly installed in the sealed container 2 by plug welding 25 or caulking first, and this also achieves the same effect as the first embodiment. Can do.

(2) In the first embodiment described above, the rotary compressor of the low-stage compressor 20 that is the first fluid machine can be a multi-cylinder compressor such as a two-cylinder rotary compressor.
(3) In the first embodiment described above, the rotary compressor of the low-stage compressor 20 that is the first fluid machine is fixedly installed in the sealed container 2 via the upper bearing 22. The upper bearing 22 is not necessarily supported, and the rotary compressor of the low-stage compressor 20 may be fixedly installed in the sealed container 2 with the cylinder member 21 as a support member.

  (4) Furthermore, in the first embodiment, as the hermetic fluid machine 1, the first fluid machine, which is one of a plurality of sets of fluid machines, is replaced with the low-stage compressor 20, and the other one. Although the example of the hermetic multistage compressor 1 in which the second fluid machine is the high-stage compressor 30 has been described, the first fluid machine and the second fluid machine are replaced with other fluid machines such as an expander and a compressor. The hermetic fluid machine 1 can be configured as a multistage expander, an expander-integrated compressor, a multicylinder compressor, or the like.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above-described embodiment, the gaps S1 and S2 are illustrated with the smaller S2 being about 0.1 mm and the larger S1 being about twice that of S2, but this is merely an example, Of course, it is not limited to such a numerical value. In the above embodiment, the oil supply structure for the low-stage compressor 20 and the high-stage compressor 30 is omitted, but it is needless to say that a known oil supply structure can be adopted.

1 Sealed fluid machinery (sealed multistage compressor)
2 Sealed container 7 Electric motor 10 Rotating shaft 20 Low stage compressor (first fluid machine)
22 Upper bearing (support member)
25 Plug welding 30 High stage compressor (second fluid machine)
31 Bearing member (support member)
35 Plug welding S1 Clearance between the upper bearing and the inner periphery of the sealed container S2 Clearance between the bearing member and the inner periphery of the sealed container

Claims (7)

Sealed fluid in which a plurality of sets of fluid machines are fixedly installed by welding or caulking via support members in a sealed container, and each fluid machine is connected via a common rotating shaft. In the manufacturing method of the machine,
A first fluid machine that is one of the plurality of sets of fluid machines is a rotary fluid machine, and a gap between the support member and the inner periphery of the sealed container is defined as S1 and the other one. A second fluid machine is a scroll type fluid machine, and when a clearance between the support member and the inner periphery of the sealed container is S2, S1> S2, and the clearance S2 is reduced. The rotary member used as the first fluid machine in which the gap S1 is increased after the support member of the scroll fluid machine used as the second fluid machine is fixedly installed in the sealed container first. A method of manufacturing a hermetic fluid machine, wherein the plurality of sets of fluid machines are assembled by fixedly installing the support member of the fluidic machine in the hermetic container. After the electric motor is fixedly installed between the plurality of sets of fluid machines fixedly installed in the hermetic container, the rotary fluid machine is used as the first fluid machine on one side of the electric motor, 2. The method for manufacturing a hermetic fluid machine according to claim 1, wherein the plurality of sets of fluid machines are assembled by fixedly installing the scroll type fluid machine, which is the second fluid machine , on the other side. Wherein across the electric motor the first fluid machine installed in one side is to the rotary fluid machine, the supporting member for fixedly installed the rotary type fluid machine in the closed vessel is an upper bearing The method for manufacturing a hermetic fluid machine according to claim 2, wherein: Sealed fluid in which a plurality of sets of fluid machines are fixedly installed by welding or caulking via support members in a sealed container, and each fluid machine is connected via a common rotating shaft. In the machine
A first fluid machine that is one of the plurality of sets of fluid machines is a rotary fluid machine, and a gap between the support member and the inner periphery of the sealed container is defined as S1 and the other one. A second fluid machine is a scroll type fluid machine, and S1> S2, where S2 is a gap between the support member and the inner periphery of the sealed container. Fluid machinery. The electric motor is fixedly installed between the plurality of sets of fluid machines fixedly installed in the sealed container at a predetermined interval, and the first fluid machine is disposed on one side of the electric motor. The hermetic fluid machine according to claim 4, wherein the rotary fluid machine and the scroll fluid machine as the second fluid machine are fixedly installed on the other side. The rotary fluid machine as the first fluid machine is a low-stage compressor, the scroll fluid machine as the second fluid machine is a high-stage compressor, and the low-stage compressor 5. A multi-stage compressor configured to suck the intermediate-pressure gas discharged into the hermetic container by being compressed by the high-stage compressor and compress it to a high pressure. Or the hermetic fluid machine according to 5. Upper bearing of the rotary fluid machine and has been the low-stage compressor, in claim 6, characterized in that it is the supporting member for fixedly installed the low-stage compressor into the closed vessel The sealed fluid machine as described.

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