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:
Feb. 20, 2001
Filed:
May. 21, 1999
Dirk Wunderwald, Baden, CH;
Martin Thiele, Baden-Rütihof, CH;
Asea Brown Boverti AG, Baden, CH;
Abstract
The object of the invention is to provide a method of operating a simply constructed centrifugal compressor equipped, in the region of the rear wall of the compressor impeller, with no sealing elements in the separating gap between the compressor impeller and the compressor casing, which method increases the service life of the centrifugal compressor. An appliance for carrying out the method is also to be made available. In accordance with the invention, this is achieved by introducing a cooling medium into the separating gap downstream of the leakage flow of the working medium and by finally removing this again after the cooling process has taken place. For this purpose, at least one supply duct for a gaseous cooling medium, the duct penetrating the compressor casing, opening into the separating gap in the region of the rear wall of the compressor impeller and directed onto the rear wall, and at least one removal duct for the cooling medium are arranged in the compressor casing.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile