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Compressor

A technology for a compressor and a rotating shaft, applied in the field of compressors, can solve the problems of limited degrees of freedom, reduced compressor efficiency, uneven air inflow conditions, etc., and achieves the effect of increasing degrees of freedom and reducing resonance components

Active Publication Date: 2009-09-23
MITSUBISHI POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In this way, due to the one-sided suction structure of the suction pipe and the arrangement of the pillars, the inflow conditions of the air flowing into the compressor are not uniform, and the pressure loss caused by the pillars increases, and the efficiency of the compressor decreases.
In addition, the degree of freedom in the blade design of the compressor is also limited due to the resonance component of the exciting force generated by arranging the struts at equal intervals in the circumferential direction.

Method used

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no. 1 approach

[0048] A first embodiment of the compressor of the present invention will be described with reference to the drawings. figure 2 is a schematic cross-sectional view showing the structure around the suction duct of the compressor of this embodiment, image 3 It is a figure which shows the positional relationship in the circumferential direction of the rotating shaft of the strut used for the compressor of this embodiment.

[0049] Such as figure 2 As shown, the inner shell 4a is formed to extend to the front end side of the rotating shaft 5, and its front end is curved toward the outer peripheral direction, and the annular suction shell 6a is connected to the curved front end. In addition, the outer casing 4b is formed into a bell mouth structure in which the inner casing 4a is bent on the compressor 1 side, and its curved portion 41 bulges toward the inner wall of the suction casing 6a, and an annular suction casing 6b is connected to the front end thereof. . In addition, ...

no. 2 approach

[0057] A first embodiment of the compressor of the present invention will be described with reference to the drawings. Image 6 It is a schematic cross-sectional view showing the structure around the suction duct of the compressor of this embodiment. figure 2 The parts with the same structure are denoted by the same symbols, and their detailed descriptions are omitted.

[0058] In this embodiment, if Image 6 shown, with figure 2 The structure shown is different. As for the support column 8, the connection position A at the inner shell 4a is formed at the upstream side compared with the connection position B at the outer shell 4b so as to face the outer circumference of the rotating shaft 5 and to face the rotating shaft. The axial downstream side of 5 is inclined. With this configuration, the distance d from the front end C of the curved portion 41 of the outer shell 4b to the connecting position B in the outer shell 4b of the support column 8 is equal to figure 2 The ...

no. 3 approach

[0065] A first embodiment of the compressor of the present invention will be described with reference to the drawings. Figure 9 is a schematic cross-sectional view showing the structure around the suction duct of the compressor of this embodiment, and figure 2 Parts having the same structure are denoted by the same symbols, and their detailed descriptions are omitted.

[0066] In this embodiment, if Figure 9 shown, with figure 2 Unlike the shown structure, the curved portion 41 of the outer shell 4b is formed to protrude further toward the suction shell 6a side, and a surface substantially parallel to the outer peripheral surface of the rotating shaft 5 (relative to the suction shell 6b) is formed on the outer peripheral side. substantially vertical plane) flat portion 41a. Further, from the front end of the flat portion 41a on the side of the suction shell 6a toward the inside, a U-shaped curved surface portion 41b is formed in cross section whose front end faces the s...

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Abstract

Provided is a compressor comprising an inner casing arranged to enclose a revolving shaft, an outer casing arranged to enclose the inner casing thereby to form a fluid passage around the revolving shaft, and a plurality of struts mounted on the entrance side of the fluid passage and between the inner casing and the outer casing. The struts are arranged radially of the revolving shaft, and the spacings between the struts adjoining in the circumferential direction of the revolving shaft are unequal.

Description

technical field [0001] This invention relates to compressors for compressing air. This application claims priority with respect to Japanese Patent Application No. 2006-343814 for which it applied on December 21, 2006, and uses the content here. Background technique [0002] Conventionally, in a gas turbine, combustion gas for rotating the turbine is generated by a combustor combusting the combustion gas with compressed air compressed by a compressor. An intake duct for sucking in air from outside air is provided at the inlet of the compressor that generates the compressed air. Such as Figure 11 As shown in the cross-sectional view of , the suction duct 100 is formed into a one-sided suction structure as follows, that is, at the front end side of the rotating shaft 5 of the movable vane 12 of the compressor 101, the outer periphery of the rotating shaft 5 forms a ring shape. Set it on the ground, and leave the upper side open in such a way that the outside air is sucked in...

Claims

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Application Information

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IPC IPC(8): F04D29/54F02C7/04
CPCF04D29/663F04D29/542F04D29/522F04D29/667F04D29/666F04D29/544F02C7/04F04D29/54
Inventor 永井尚教佐藤宪次
Owner MITSUBISHI POWER LTD
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