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. 22, 2005
Filed:
May. 13, 2004
Masayuki Fukutani, Wako, JP;
Atsukuni Waragai, Wako, JP;
Etsuo Noda, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
In a device for supplying secondary air in a gas turbine engine provided with an inner shaft () supporting a low pressure compressor and a low pressure turbine and a hollow outer shaft () coaxially nested with the inner shaft and supporting a high pressure compressor and a high pressure turbine, a seal air introduction passage () for introducing a part of high pressure air drawn from the high pressure compressor into a seal section provided in each of the bearing boxes is provided with a high pressure air introduction turbine () attached to the outer shaft in a rotationally fast manner. Owing to the use of the high pressure air introduction turbine, work is extracted from the seal air and cooling air derived from the supplied air and having a high temperature and high pressure air so that an excessive rise in the seal pressure at the normal rotational speed can be avoided and, at the same time, the supplied air can be reduced in temperature thereby avoiding an excessive rise in the temperature of the lubricating oil for the bearing.