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. 28, 1976
Filed:
Nov. 28, 1975
Sterling C Barton, Scotia, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
In a gas-cooled dynamoelectric machine, sealing means are provided at each end of the machine to prevent the axial leakage of gas coolant out of the machine along the rotor surface. One type of known seal comprises an annular holder at each end of the machine, each holder having resiliently mounted therein a pair of sealing rings spaced apart in the axial direction to define an oil feed annulus therebetween. Seal oil is supplied to the oil feed annulus at a higher pressure than the gas coolant pressure thereby sealing the gas coolant into the machine. If the gas coolant design pressure is raised so must the seal oil pressure be raised which may ultimately cause the sealing ring adjacent the ambient side of the sealing means to bind against the holder in the radial direction. The present invention is directed toward maintaining the radial mobility of shaft seals, of the type described, against pressure increases between the sealing rings.