Title:
CENTRIFUGAL COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2022/064751
Kind Code:
A1
Abstract:
In order to provide a centrifugal compressor making it possible to improve maintenance of efficiency while also reducing the outer diameter of a stationary flow path, the present invention is a centrifugal compressor characterized by comprising: a diffuser in which a fluid that has flowed out from a plurality of centrifugal impellers attached to a rotating shaft flows in a centrifugal direction away from the rotating shaft; a return flow path which is provided downstream of the diffuser and in which fluid flowing in to a later-stage centrifugal impeller from the diffuser flows in a return direction back to the rotating shaft; a plurality of return vanes that are disposed in the shape of a circular cascade centered on a centerline of the rotating shaft, and are installed in the return flow path; and a turnaround part where the flow of the fluid flowing through the diffuser turns from the centrifugal direction to the axial direction and furthermore turns from the axial direction to the return direction, the return vanes, in which multiple circular cascades are provided, being disposed in two rows from the upstream side toward the downstream side in the flow of the fluid in the return flow path, wherein an inlet vane angle (β) of a rear blade provided to the downstream side, of the return vanes, is lying down more in the peripheral direction with respect to an inlet vane angle (α) of a front blade provided to the upstream side, of the return vanes (β <α).
Inventors:
HIRADATE KIYOTAKA (JP)
TSUKAMOTO KAZUHIRO (JP)
MOCHIZUKI YUTA (JP)
KOBAYASHI HIROMI (JP)
NISHIOKA TAKAHIRO (JP)
TSUKAMOTO KAZUHIRO (JP)
MOCHIZUKI YUTA (JP)
KOBAYASHI HIROMI (JP)
NISHIOKA TAKAHIRO (JP)
Application Number:
PCT/JP2021/016943
Publication Date:
March 31, 2022
Filing Date:
April 28, 2021
Export Citation:
Assignee:
HITACHI INDUSTRIAL PRODUCTS LTD (JP)
International Classes:
F04D29/44
Domestic Patent References:
| WO2016120316A1 | 2016-08-04 | |||
| WO2018166716A1 | 2018-09-20 |
Foreign References:
| JPH01149597U | 1989-10-17 | |||
| JP6339794B2 | 2018-06-06 | |||
| JPH0697487B2 | 1994-11-30 | |||
| JP2001200797A | 2001-07-27 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
Download PDF: