Title:
多段流体機械
Document Type and Number:
Japanese Patent JP6854687
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a multistage fluid machine capable of improving revolution removal performance in a return channel while reducing rotor-stator blade interference with a blade of a subsequent stage of impeller.SOLUTION: With respect to a height of a revolution removal member 13 in a width direction of a return channel 10, a value H2 on a rear edge 15 of the revolution removal member 13 is smaller than a value H1 on a front edge 14 of the revolution removal member 13. Moreover, the height of the revolution removal member 13 decreases broadly monotonously as going to the downstream side of a flow of fluid. A distance in the width direction between a member center line A which presents a center of the revolution removal member 13 in the width direction of a return channel 10 and a wall surface 16 of the shroud side on the return channel 10 is as follows. That is, with respect to the distance, a value D2 on the rear edge 15 of the revolution removal member 13 is smaller than a value D1 on the front edge 14 of the revolution removal member 13 and decreases broadly monotonously as going to the downstream side.SELECTED DRAWING: Figure 4
Inventors:
Shiraken Shiraken
Hiromi Kobayashi
Hiromi Kobayashi
Application Number:
JP2017075042A
Publication Date:
April 07, 2021
Filing Date:
April 05, 2017
Export Citation:
Assignee:
Hitachi Industrial Products, Ltd.
International Classes:
F04D1/08; F04D29/44
Domestic Patent References:
| JP2001200797A | ||||
| JP2016031064A | ||||
| JP2015148192A | ||||
| JP2018135815A |
Attorney, Agent or Firm:
Isono International Patent and Trademark Office