Title:
MANUFACTURE OF FULL SHROUD IMPELLER
Document Type and Number:
Japanese Patent JPH03264701
Kind Code:
A
Abstract:
PURPOSE:To enhance reliability of strength of a diffusion joined portion by superposing a member, which is previously divided at a point apart by a specific ratio of a height of a blade from an inner surface of a core plate portion, in a blade portion on a fluid outlet of an impeller, for diffusion joining. CONSTITUTION:A full shroud impeller 5 is constituted of a member where an upper half 1 of an impeller is formed integrally with a side plate portion 2, and a member where a lower half 3 is formed integrally with a core plate portion 4, wherein the upper half 1 and the lower half 3 are diffusion joined to each other in a confronted manner. In this case, a member, which is previously divided at a point apart by a length of 0.4-0.6 times a height of a blade from the inner surface of the core plate portion, is superposed in a blade portion on a fluid outlet side of the impeller, and then, is diffusion joined. For example, if a diameter of the impeller 5 is 400mm; the number of blades 6 each having a width of 3mm is 13; and an angle between an inner surface 7 of a side plate portion and an inner surface 8 of the core plate portion is 18 deg., a divided point 9 is located at a point apart by 5.5mm from the inner surface of the core plate portion 8.
Inventors:
KONO AKIOMI
SAKATA SHOJI
SAKATA SHOJI
Application Number:
JP6097290A
Publication Date:
November 26, 1991
Filing Date:
March 14, 1990
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F01D5/04; F04D29/28; (IPC1-7): F01D5/04; F04D29/28
Domestic Patent References:
| JPS601998U | 1985-01-09 | |||
| JPS56154104A | 1981-11-28 |
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)
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