The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2012
Filed:
Jul. 31, 2008
Manabu Yagi, Tsuchiura, JP;
Tadaharu Kishibe, Hitachinaka, JP;
Takanori Shibata, Hitachinaka, JP;
Hideo Nishida, Kasumigaura, JP;
Hiromi Kobayashi, Kasumigaura, JP;
Tetsuya Kuwano, Tsuchiura, JP;
Manabu Yagi, Tsuchiura, JP;
Tadaharu Kishibe, Hitachinaka, JP;
Takanori Shibata, Hitachinaka, JP;
Hideo Nishida, Kasumigaura, JP;
Hiromi Kobayashi, Kasumigaura, JP;
Tetsuya Kuwano, Tsuchiura, JP;
Hitachi Plant Technologies, Ltd., Tokyo, JP;
Abstract
A centrifugal compressor is equipped with an impeller having a blade angle distribution that makes it possible to achieve a relatively wide operating range. The blade angle of a shroud side facing a circular plate of a blade is termed a first angle and a blade angle of a hub side disposed at the circular plate is a second. The shroud side is formed in a curved shape having an angle distribution from a front area in a shaft direction toward a centrifugal direction in which the first angle is the local maximum point before a substantially middle portion and the local minimum point after the substantially middle point. The hub side is formed in a curved shape having an angle distribution from the front area in the shaft direction toward the centrifugal direction in which the second angle is the maximum local point before the substantially middle portion.