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. 20, 2012
Filed:
Jun. 22, 2009
Masanori Tanaka, Tokyo, JP;
Hideo Nishida, Tokyo, JP;
Hiromi Kobayashi, Tokyo, JP;
Tetsuya Kuwano, Tokyo, JP;
Toshio Itou, Tokyo, JP;
Masanori Tanaka, Tokyo, JP;
Hideo Nishida, Tokyo, JP;
Hiromi Kobayashi, Tokyo, JP;
Tetsuya Kuwano, Tokyo, JP;
Toshio Itou, Tokyo, JP;
Hitachi Plant Technologies, Ltd., Tokyo, JP;
Abstract
In a high pressure centrifugal compressor, the occurrence of rotating stall noticeable in a comparatively-low specific speed wheel stage is prevented, thereby high efficient fluid performance is obtained and reliability is improved. The centrifugal compressor has a first vaneless diffuser with a constant flow channel height on the downstream side of an impeller, and a second vaneless diffuser in which the flow channel height decreases in a flow direction from an inlet to an outlet on the downstream side of the first vaneless diffuser. These diffusers are combined with an impeller using thick blades.