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Impeller, compressor and manufacturing method of impeller

An impeller blade and impeller technology, which is applied in the field of compressor and impeller manufacturing, can solve problems such as performance deterioration and disrupt fluid flow, achieve the effects of fluid flow chaos suppression, reliability, and manufacturing precision improvement.

Inactive Publication Date: 2015-11-25
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The remaining part of the cutting disturbs the flow of the fluid flowing around, so the performance is deteriorated compared with the shrouded impeller manufactured by other methods that do not produce the remaining part of the cutting

Method used

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  • Impeller, compressor and manufacturing method of impeller
  • Impeller, compressor and manufacturing method of impeller
  • Impeller, compressor and manufacturing method of impeller

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach 〕

[0067] Below, refer to Figure 1 to Figure 4 The compressor according to the first embodiment of the present invention will be described.

[0068] figure 1 It is a schematic diagram explaining the general structure of the compressor of this embodiment.

[0069] In this embodiment, the compressor of the present invention is described as being applied to a centrifugal compressor for pressure-feeding process gas (fluid) in a chemical plant, but it is not limited to the centrifugal compressor and may be applied to diagonal flow compression machine, or a compressor suitable for use for other purposes, without particular limitation.

[0070] Such as figure 1 As shown, the centrifugal compressor (compressor) 1 will be from the upstream side ( figure 1 The upper side of the) sucked fluid to the downstream side ( figure 1 left and right direction) equipment for pressure delivery.

[0071] Such as figure 1 As shown, a rotary shaft 2 and an impeller 3 are provided in a centrifugal...

no. 2 approach 〕

[0119] Next, refer to Figure 5 and Image 6 A second embodiment of the present invention will be described.

[0120] The basic structure of the compressor of this embodiment is the same as that of the first embodiment, but the position of the dividing surface is different from that of the first embodiment. Therefore, in this embodiment, using Figure 5 and Image 6 The configurations of the split surface, the upstream member, and the downstream member will be described, and descriptions of other constituent elements and the like will be omitted.

[0121] Figure 5 It is a schematic diagram explaining the structure of the impeller of the compressor concerning this embodiment. Image 6 is description Figure 5 A schematic diagram of the structure of the upstream side part and the downstream side part in the impeller.

[0122] In addition, the same code|symbol is attached|subjected to the same component as 1st Embodiment, and the description is abbreviate|omitted.

[012...

no. 3 approach 〕

[0139] Next, refer to Figure 7 and Figure 8 A third embodiment of the present invention will be described.

[0140] The basic structure of the compressor of this embodiment is the same as that of the first embodiment, but the position of the dividing surface is different from that of the first embodiment. Therefore, in this embodiment, using Figure 7 and Figure 8 The configurations of the split surface, the upstream member, and the downstream member will be described, and descriptions of other constituent elements and the like will be omitted.

[0141] Figure 7 It is a schematic diagram explaining the structure of the impeller of the compressor concerning this embodiment. Figure 8 is description Figure 7 A schematic diagram of the structure of the upstream side part and the downstream side part in the impeller.

[0142] In addition, the same code|symbol is attached|subjected to the same component as 1st Embodiment, and the description is abbreviate|omitted.

[0...

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PUM

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Abstract

A hub (6) is supported rotatably about an axis of rotation (L), and the diameter thereof increases from upstream to downstream sides along a fluid flow. A plurality of impeller blades (5) extend radially outward from an outer circumferential surface of the hub (6). A shroud (4) is formed in a cylindrical shape whose diameter increases from the upstream to downstream sides along the fluid flow and joins outer circumferential ends of the plurality of impeller blades (5). The impeller blades (5) are composed of upstream blade segments (5U) and downstream blade segments (5L) bonded at a bonding surface (P1) extending in a direction substantially perpendicular to the axis of rotation (L). The upstream blade segments (5U) are integral with at least a portion of the shroud (4), and the downstream blade segments (5L) are integral with at least a portion of the hub (6). This improves the reliability and performance of an impeller (3) and a compressor (1).

Description

technical field [0001] In particular, the invention relates to impellers with suitable shrouds for use in centrifugal compressors or diagonal flow compressors, compressors having such impellers and methods of manufacturing the impellers. Background technique [0002] Generally, an open impeller without a shroud and a shrouded impeller having a shroud are known as an impeller used in a centrifugal compressor or a diagonal flow compressor. [0003] It is known that the shrouded impeller has no gap between the blades of the impeller and the housing housing the impeller compared to the open impeller, and thus has the advantages of less flow loss and high compression efficiency. [0004] On the other hand, a shrouded impeller has a problem that it is more difficult to manufacture than an open impeller because it has a shroud. [0005] As a method for solving the above-mentioned problems, a method of forming the hub, blades, and shroud separately, and joining between the blade an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/28
CPCF04D29/284F04D29/30F04D29/023F04D29/285
Inventor 中庭彰宏渡部裕二郎安井丰明宫川和芳绀野勇哉
Owner MITSUBISHI HEAVY IND LTD