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:
Aug. 03, 1982
Filed:
Nov. 01, 1979
Hitachi, Ltd., Tokyo, JP;
Abstract
A moving blade for use in a steam turbine has a turbine rotor carrying a multiplicity of radially outwardly extending moving blades, each moving blade being provided at its leading edge of the radially outer end thereof with an anti-erosion plate attached by welding. The turbine blade has thicknesswise protrusions formed on both surfaces thereof at a portion near the base of the anti-erosion plate where it is attached to the moving blade. Thanks to these thicknesswise protrusions, the moving blade has such a radial distribution of cross-sectional area that the cross-sectional area is greater at the portion where the thicknesswise protrusions are formed than at other portions which are adjacent to the above-mentioned portion of the moving blade in the radial direction. As a result, the stresses at the portion of the moving blade near the base of the anti-erosion plate are reduced.