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Impeller and turbomachinery including the impeller

一种叶轮、叶片的技术，应用在机械设备、发动机制造、机器/发动机等方向，能够解决难以想象等问题，达到性能提高、抑制二次流、提高性能的效果

Inactive Publication Date: 2012-10-17
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, regardless of the impeller of any of the above-mentioned forms, it is difficult to imagine the method of forming blades with countless curved elements, and it is necessary to limit the pattern of curved elements that are actually related to performance improvement. picture of

Method used

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  • Impeller and turbomachinery including the impeller
  • Impeller and turbomachinery including the impeller
  • Impeller and turbomachinery including the impeller

Examples

Experimental program
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Embodiment Construction

[0048] Hereinafter, some embodiments of the present invention will be described with reference to the drawings. First, a two-stage centrifugal compressor will be described as an example of a turbomachine. image 3 It is a longitudinal sectional view of a two-stage centrifugal compressor. Here, as the multi-stage centrifugal compressor 300, a two-stage centrifugal compressor is proposed, but the present invention can be applied to a single-stage or multi-stage turbomachine using centrifugal impellers or diagonal flow impellers, and is not particularly limited to two-stage centrifugal compressors. stage centrifugal compressor.

[0049] The two-stage centrifugal compressor 300 includes a primary stage 301 and a second stage 302 . The primary impeller 308 and the second stage impeller 311 are attached to the same rotating shaft 303 to form a rotating body. The rotary shaft 303 and the first-stage and second-stage impellers 308 and 311 are accommodated in the compressor housing ...

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Abstract

An impeller includes a hub plate and a plurality of blades circumferentially disposed at intervals on one surface side of the hub plate. Each blade has a shape formed by piling up a plurality of blade sections in a blade height-wise direction of each blade in a reference impeller in which the hub plate intersects with the blades and which includes a linear element blade in the blade height-wise direction so as to form a curvilinear element blade. In piling up the blade sections, amounts of tangential lean and sweep to be applied to the blade sections are increased as it goes from an end face of at least one of a hub plate side end and a counter hub plate side end toward a span intermediate part of the blade.

Description

technical field [0001] The present invention relates to an impeller such as a centrifugal impeller or a diagonal flow impeller, and a turbomachine having the same, and particularly relates to a turbomachine that imparts energy to a working fluid, such as a compressor, blower, fan, pump, etc., having a centrifugal impeller or a diagonal flow impeller. Background technique [0002] A multi-stage compressor, which is a type of turbomachinery, is a stack of stages consisting of a plurality of centrifugal impellers or oblique flow impellers mounted on the same shaft, a diffuser and an anti-guide vane installed downstream of each impeller. form. The impellers used in this multi-stage compressor are manufactured by cutting blades in many cases. If the airfoil shape of the blade constituting the impeller can be defined as an aggregate of linear elements, a rod-shaped cutting tool such as a milling machine can be used. In this case, while rotating the side surface of the machining ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/26
CPCF04D29/30F04D29/284F05D2250/70
Inventor 杉村和之西田秀夫小林博美伊藤俊雄
Owner HITACHI LTD