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:
Dec. 16, 1997
Filed:
Nov. 16, 1995
Yukihiro Nishida, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A rotor for a dynamo-electric machine has a V-shaped groove for providing a fast gas stream with an outward speed component in the radial direction, the V-shaped groove being provided on the upstream side of the fast gas stream at an opening of a wedge exhaust hole. The dynamo-electric machine also has a sloping surface which is inclined with respect to the radial direction so that the exhaust stream coming out of the wedge exhaust hole is led in the direction of the fast gas stream, the sloping surface being provided on the downstream side of the fast gas stream at the wedge exhaust hole. This structure permits a smaller angle of the mergence of the fast gas stream and the exhaust stream and it accordingly reduces the pressure loss in the coolant gas at the outlet of the wedge exhaust hole, thus achieving reduced loss in the fan power. The result is higher operating efficiency of the rotor.