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Patent Searching and Data


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 (2681 Hirosawa-cho 1-chome, Kiryu-sh, Gunma 55, 〒3768555, JP)
HORISOKO Shinichiro (2681 Hirosawa-cho 1-chome, Kiryu-sh, Gunma 55, 〒3768555, JP)
Application Number:
JP2018/007194
Publication Date:
September 20, 2018
Filing Date:
February 27, 2018
Export Citation:
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Assignee:
MITSUBA CORPORATION (2681, Hirosawa-cho 1-chome Kiryu-sh, Gunma 55, 〒3768555, JP)
International Classes:
F04D5/00; F04D29/24; F04D29/66
Foreign References:
JPH1150990A1999-02-23
JP2003278684A2003-10-02
JP2011102551A2011-05-26
JP2007270681A2007-10-18
JP2010053857A2010-03-11
JPS63248999A1988-10-17
Attorney, Agent or Firm:
NISHIZAWA Kazuyoshi et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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