CENTRIFUGAL COMPRESSOR, AND METHOD FOR MANUFACTURING SAME

Title:

CENTRIFUGAL COMPRESSOR, AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2022/137794

Kind Code:

A1

Abstract:

In this centrifugal compressor, a return flow passage (4) is arranged between a hub-side wall surface (80) and a shroud-side wall surface (90). The return flow passage (4) includes front vanes (61) in a circular row on an upstream side, and rear vanes (62) in a circular row on a downstream side. The front vanes (61) and the rear vanes (62) are both formed on the shroud-side wall surface (90). The front vanes (61) are formed on an annular member (92a) formed separately from the rear vanes (62). The annular member (92a) is attached to the return flow passage (4). As a result, the tangential velocity component removal capability of the front vanes and the rear vanes provided in the return flow passage of the centrifugal compressor is improved.

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Inventors:

MOCHIZUKI YUTA (JP)
NISHIOKA TAKAHIRO (JP)
HIRADATE KIYOTAKA (JP)
TSUKAMOTO KAZUHIRO (JP)

Application Number:

PCT/JP2021/039638

Publication Date:

June 30, 2022

Filing Date:

October 27, 2021

Export Citation:

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Assignee:

HITACHI INDUSTRIAL PRODUCTS LTD (JP)

International Classes:

F04D29/44; F04D17/12; F04D29/62

Foreign References:

JPH01149597U	1989-10-17
US20190055960A1	2019-02-21
JP2004150404A	2004-05-27
JP2018178769A	2018-11-15