Title:
IMPELLER
Document Type and Number:
WIPO Patent Application WO/2018/168442
Kind Code:
A1
Abstract:
In the present invention, a blade groove (Qn) is a constituent of a blade groove group of m blade grooves, where m ≥ 5 is satisfied, starting with a first blade groove (Q1) and continuing therefrom. A pitch angle (θn) is configured to be different from a pitch angle (θn) of another blade groove that is a constituent of one blade groove group (Rn). A combined pitch angle (tn) is configured such that, of the first combined pitch angle t1 to the ith combined pitch angle ti, no more than two have the same value, and the number of sets each having the same value does not exceed i × 0.18.
Inventors:
TAKEUCHI NAOKI (JP)
HORISOKO SHINICHIRO (JP)
HORISOKO SHINICHIRO (JP)
Application Number:
PCT/JP2018/007194
Publication Date:
September 20, 2018
Filing Date:
February 27, 2018
Export Citation:
Assignee:
MITSUBA CORP (JP)
International Classes:
F04D5/00; F04D29/24; F04D29/66
Foreign References:
| JPH1150990A | 1999-02-23 | |||
| JP2003278684A | 2003-10-02 | |||
| JP2011102551A | 2011-05-26 | |||
| JP2007270681A | 2007-10-18 | |||
| JP2010053857A | 2010-03-11 | |||
| JPS63248999A | 1988-10-17 |
Other References:
See also references of EP 3597924A4
Attorney, Agent or Firm:
NISHIZAWA Kazuyoshi et al. (JP)
Download PDF: