JP2005248832A - Turbo compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce number of parts, save installation space and improve efficiency by commonizing casings of a three stage compression turbo compressor and a four stage compression turbo compressor. <P>SOLUTION: The casing 2 includes an axle box part 5. A first compressor 31 and a third compressor 33 are provided on one side surface of the axle box part. A second compressor 32 is provided on another side surface of the axle box. The first compressor and the second compressor are arranged on a same center line and are driven by a first rotary shaft 16. The third compressor is driven by a second rotary shaft 36 provided in parallel with the first rotary shaft. The first rotary shaft and the second rotary shaft are rotated by a drive shaft 22. A blank space is formed in a part adjoining the second compressor. A fourth compressor 43 driven by the second rotary shaft can be installed in the blank space. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a turbo compressor for supplying compressed air to a factory compressed air line.

  Various factories use compressed air for various applications, and factories are equipped with turbo compressors to supply the required compressed air. The turbo compressor includes a plurality of stages of compressors so as to supply high-pressure compressed air.

  In general, the specifications of the turbo compressor are determined according to the factory where the turbo compressor is installed, and the specifications of the turbo compressor are also determined so as to satisfy the specifications. For this reason, the turbo compressor is produced as a single product. In addition, reduction in manufacturing cost and improvement in efficiency of the turbo compressor are also required.

  In order to satisfy a uniform product, reduce production costs and improve efficiency, the main parts of the turbo compressor are shared. For example, the casing is integrally formed of a casting, the casing is made common, a plurality of compressors are attached to the casing, and the specifications of the provided compressor are appropriately changed.

  As a turbo compressor in which a plurality of compressors are provided in a casing, there is one disclosed in Patent Document 1.

  As a turbo compressor for supplying high-pressure compressed air with a plurality of stages of compressors, usually a three-stage compressor is provided, and compressed air of 0.5 MPa to 1.0 MPa by three-stage compression. Is sent out.

  However, depending on the factory, compressed air with higher compression, for example, compressed air of about 1.1 MPa to 2.0 MPa, may be required, and a turbo compressor that satisfies such requirements includes a four-stage compressor. It is necessary to be.

  Conventionally, the casing of the turbo compressor has been manufactured for the turbo compressor of the three-stage compression, which has the highest demand frequency in order to reduce the cost, and does not support the four-stage compression. For this reason, in order to make a turbo compressor of four-stage compression, an integral casing is not used but a four-stage compressor is individually connected by piping, or a three-stage compressor using an integral casing is used. It was possible to cope with the turbo compressor by separately connecting a fourth-stage compressor with a pipe to form a four-stage compressor.

  Such a conventional turbo compressor having a four-stage compression configuration has problems such as an increase in the number of parts, an increase in cost, an increase in installation space, and a lack of improvement in efficiency.

JP 2003-97489 A

  In view of such circumstances, the present invention enables a four-stage compression turbo compressor to be configured by a three-stage compression turbo compressor casing, thereby reducing the number of parts, saving installation space, and improving efficiency. .

  In the present invention, the casing has a shaft box part, a first compressor and a third compressor are provided on one side surface of the shaft box part, and a second compressor is provided on the other side surface of the shaft box part, The first compressor and the second compressor are arranged on the same center line and driven by a first rotating shaft, and the third compressor is provided in a second rotation provided in parallel to the first rotating shaft. Driven by a shaft, the first rotating shaft and the second rotating shaft are rotated by the driving shaft, and an empty space is formed in a portion adjacent to the second compressor, and the empty space is formed by the second rotating shaft. The present invention relates to a turbo compressor in which a fourth compressor to be driven can be attached.

  In the present invention, the first compressor housing for the first compressor, the second compressor housing for the second compressor, and the third compressor housing for the third compressor are integrated with the shaft box portion. The present invention relates to a molded turbo compressor, and the casing relates to a turbo compressor in which a cooler housing portion incorporating a cooler and the shaft box portion are integrally formed.

  According to the present invention, the compressor mounted on the shaft box portion has a second rotating shaft to which the third compressor can be attached at one end, the third compressor at one end, and the third compressor at the other end. The present invention relates to a turbo compressor in which a second rotary shaft to which a fourth compressor can be attached is selected and provided. Further, the second rotary shaft is provided so that both end portions are exposed from the shaft box portion, and is provided at one end. The third compressor is provided, and the other end relates to a turbo compressor that can connect the rotation shaft of the fourth compressor.

  According to the present invention, the casing has a shaft box portion, the first compressor and the third compressor are provided on one side surface of the shaft box portion, and the second compressor is provided on the other side surface of the shaft box portion. The first compressor and the second compressor are arranged on the same center line and driven by a first rotating shaft, and the third compressor is provided in parallel to the first rotating shaft. Driven by two rotating shafts, the first rotating shaft and the second rotating shaft are rotated by the driving shaft, and an empty space is formed in a portion adjacent to the second compressor, and the empty space has the second rotation. Since the fourth compressor driven by the shaft can be installed, it is possible to manufacture a turbo compressor with three-stage compression and a turbo compressor with four-stage compression with a common casing, which can respond to various customer requirements. In addition, the production cost can be reduced.

  Further, according to the present invention, the configuration of the compressor attached to the shaft box portion allows the second compressor shaft to be attached to one end portion, the third compressor to the one end portion, and the other end portion. Since the second rotating shaft to which the fourth compressor can be attached is selected and provided, when changing from a three-stage compression to a four-stage compression turbo compressor, it is possible to cope with a minimum of component changes. is there.

  Further, according to the present invention, the second rotating shaft is provided such that both end portions are exposed from the shaft box portion, the third compressor is provided at one end, and the other end is the rotation of the fourth compressor. Since the shafts can be connected, excellent effects such as being able to change from a three-stage compression to a four-stage compression turbo compressor without changing the parts are exhibited.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  In the present invention, a casing common to the three-stage compression turbo compressor and the four-stage compression turbo compressor is used.

  First, a three-stage turbo compressor 1 having three-stage compression will be described with reference to FIGS.

  FIG. 1 is a plan sectional view of a three-stage turbo compressor 1, and FIG. 3 shows a casing 2 with an upper cover removed.

  The casing 2 includes a cooler housing 3 that houses a cooler (not shown) and a compressor support 4 that supports the compressor.

  The compressor support portion 4 includes a hollow shaft box portion 5, an upper cover (not shown) fixed to the upper portion of the shaft box portion 5, and a first compressor integrally formed on a side surface of the shaft box portion 5. The housing 6, the second compressor housing 7, and the third compressor housing 8 are configured, and the first compressor housing 6 and the second compressor housing 7 are arranged coaxially.

  A first inlet 9 is fitted in the first compressor housing 6 in an airtight manner, and the first inlet 9 has a first suction port 10 in the center, and the first inlet 9 and the first compressor housing Between the six, the first winding chamber 11 is formed in which the cross-sectional area gradually decreases along the circumferential direction.

  Similarly, the second compressor housing 7 and the third compressor housing 8 are also fitted with a second inlet 12 and a third inlet 13 to form a second volume chamber 14 and a third volume chamber 15, respectively. Two suction ports 26 and a third suction port 27 are formed.

  A first rotating shaft 16 is disposed on the center line of the first compressor housing 6 and the second compressor housing 7, and the first rotating shaft 16 is rotatably provided through the casing 2. The first rotating shaft 16 support portion of the casing 2 is airtight. A first impeller 17 is fixed to a shaft end portion of the first rotating shaft 16 that discharges to the first compressor housing 6 side, and a second blade is attached to a shaft end portion that projects to the second compressor housing 7 side. The car 18 is fixed.

  A second rotating shaft 19 is disposed on the center line of the third compressor housing 8, is rotatably supported by the shaft box portion 5, and protrudes toward the third compressor housing 8 side of the second rotating shaft 19. A third impeller 21 is fixed to the shaft end.

  A drive shaft 22 parallel to the first rotary shaft 16 and the second rotary shaft 19 is rotatably provided in the shaft box portion 5, and a drive gear 23 is fixed to the drive shaft 22. A first driven gear 24 is provided at the central portion of the first rotating shaft 16, and a second driven gear 25 is provided at the central portion of the second rotating shaft 19, and the first driven gear 24 and the second driven gear 24 are provided. The driven gear 25 meshes with the drive gear 23.

  The drive shaft 22 is connected to an output shaft of a drive motor (not shown), and the drive shaft 22 is rotated by the drive motor, whereby the first impeller 17 is connected via the drive gear 23 and the first driven gear 24. The second impeller 18 is rotated at a predetermined speed increasing ratio, and the third impeller 21 is rotated at the predetermined speed increasing ratio via the drive gear 23 and the second driven gear 25. Yes.

  Thus, the first compressor housing 6, the first inlet 9, the first impeller 17, and the like constitute a first compressor 31, and the second compressor housing 7, the second inlet 12, and the like A second compressor 32 is constituted by the second impeller 18 and the like, and a third compressor 33 is constituted by the third compressor housing 8, the third inlet 13, the third impeller 21 and the like.

  When the specifications and performance of the first compressor 31, the second compressor 32, and the third compressor 33 are changed, the first impeller 17, the second impeller 18, and the third impeller 21 are changed. What is necessary is just to change and change the said 1st inlet 9, the said 2nd inlet 12, and the said 3rd inlet 13, and it is not necessary to change the said casing 2 itself.

  As apparent from FIGS. 1 and 3, the space adjacent to the second compressor housing 7 is left as an empty space 28.

  The first compressor 31, the second compressor 32, and the third compressor 33 are operated by driving the drive shaft 22 at a constant rotation.

  By rotating the first impeller 17, air is sucked from the first suction port 10, and the compressed air passes through the first volume chamber 11 and is a first cooler (see FIG. (Not shown) is cooled, sucked from the second suction port 26 of the second compressor 32, and the second-stage compressed air is a second cooler (not shown) in the cooler housing 3. The compressed air cooled and led to the third suction port 27 of the third compressor 33 is sucked and sucked in the third stage, and the compressed air is compressed into the cooler housing 3. It is sent through the internal cooler.

  Next, a four-stage turbo compressor 35 with four-stage compression will be described with reference to FIGS.

  2 and 4, the same components as those shown in FIGS. 1 and 3 are denoted by the same reference numerals, and the description thereof is omitted.

  As the casing 2 of the four-stage turbo compressor 35, the same casing 2 used in the three-stage turbo compressor 1 is used. The support part of the second rotating shaft 19 of the shaft box part 5 of the casing 2 is changed, and the second rotating shaft 36 is used instead of the second rotating shaft 19.

  The second rotating shaft 36 has both shaft end portions penetrating the shaft box portion 5, and the portion other than the shaft end portion on the side opposite to the third compressor housing 8 has the same specifications as the second rotating shaft 19. It is. The second rotating shaft 36 is airtightly supported by the shaft box portion 5.

  A fourth compressor housing 37 is separately prepared, and the fourth compressor housing 37 is disposed in the empty space 28 on the opposite side of the shaft box portion 5 from the third compressor housing 8. The fourth compressor housing 37 is positioned concentrically with the second rotating shaft 36 and fixed at a required position by a bolt 38 inserted from the hollow portion of the shaft box portion 5. If there is no room in the hollow portion, a stud bolt may be used.

  A shaft end portion of the second rotating shaft 36 protrudes into the fourth compressor housing 37, a fourth impeller 42 is fixed to the shaft end portion, and a fourth inlet 39 is connected to the fourth compressor housing. 37 is hermetically fitted. Thus, the fourth compressor 43 is attached using the empty space 28.

  The first compressor 31, the second compressor 32, the third compressor 33, and the fourth compressor 43 are operated by rotating the drive shaft 22 at a constant speed.

  The compressed air that is sequentially compressed by the first compressor 31, the second compressor 32, and the third compressor 33 and that is sent out from a third cooler (not shown) is an intake port of the fourth compressor 43. After being sucked from 41 and compressed in the fourth stage, it is sent out from a discharge port (not shown) of the fourth compressor 43. Regarding the compressed air sent out from the fourth compressor 43, if there is a customer request, a fourth cooler may be separately provided and sent out after cooling.

  As described above, in the turbo compressor according to the present invention, a space in which the fourth compressor 43 is provided in advance is secured, and additional processing of the shaft support portion is performed on the same casing 2 as the three-stage turbo compressor 1. The fourth compressor 43 can be easily incorporated by changing to the second rotating shaft 36. Therefore, a casing is manufactured for the three-stage compression turbo compressor having the highest demand frequency, and the casing is not specially manufactured for the fourth compressor. The machine can be achieved.

  The shaft end of the second rotary shaft 19 on the side opposite to the third compressor housing 8 is exposed to the empty space 28 side, and the rotary shaft of the fourth compressor 43 can be connected to the second rotary shaft 19. As a result, the fourth compressor 43 can be provided without additional processing of the shaft box portion 5 and replacement of the second rotating shaft 19.

  In addition, according to the present invention, when the 4-stage turbo compressor 1 is initially installed and then requested to be 4-stage turbo, the fourth compressor 43 is added without re-equiping the turbo compressor. By providing, it becomes possible to cope.

FIG. 3 is a plan sectional view showing the embodiment of the present invention and showing a case of a three-stage compression configuration. FIG. 5 is a plan sectional view showing the embodiment of the present invention and showing a case of a four-stage compression configuration. It is a perspective view of the casing used in the embodiment of the present invention. It is a perspective view at the time of using the casing used by embodiment of this invention as a 4 step | paragraph compression structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 3 stage | paragraph turbo compressor 2 Casing 3 Cooler accommodating part 4 Compressor support part 5 Shaft box part 6 1st compressor housing 7 2nd compressor housing 8 3rd compressor housing 16 1st rotating shaft 17 1st impeller 18 Second impeller 19 Second rotating shaft 21 Third impeller 22 Drive shaft 23 Drive gear 24 First driven gear 25 Second driven gear 28 Empty space 31 First compressor 32 Second compressor 33 Third compressor 36 First 2 rotary shafts 37 4th compressor housing 42 4th impeller 43 4th compressor

Claims (5)

  The casing has a shaft box portion, a first compressor and a third compressor are provided on one side surface of the shaft box portion, a second compressor is provided on the other side surface of the shaft box portion, and the first compression The compressor and the second compressor are disposed on the same center line and are driven by a first rotating shaft, and the third compressor is driven by a second rotating shaft provided in parallel to the first rotating shaft. The first rotating shaft and the second rotating shaft are rotated by a drive shaft, and an empty space is formed in a portion adjacent to the second compressor, and the empty space is driven by the second rotating shaft. A turbo compressor characterized in that four compressors can be attached.   The first compressor housing for the first compressor, the second compressor housing for the second compressor, and the third compressor housing for the third compressor are integrally formed with the shaft box portion. 1 turbo compressor.   The turbo compressor according to claim 1, wherein the casing is integrally formed with a cooler housing portion in which a cooler is incorporated and the shaft box portion.   According to the configuration of the compressor attached to the shaft box, the second rotary shaft to which the third compressor can be attached at one end, the third compressor at one end, and the fourth compressor at the other end. The turbo compressor according to claim 1, wherein a second rotating shaft that can be attached is selected and provided.   The second rotation shaft is provided such that both ends are exposed from the shaft box portion, the third compressor is provided at one end, and the rotation shaft of the fourth compressor is connectable at the other end. Item 1. The turbo compressor according to item 1.

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