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:
Mar. 24, 2015
Filed:
Mar. 04, 2010
Ludger Alfes, Dorsten, DE;
Wolfgang Zacharias, Duisburg, DE;
Ludger Alfes, Dorsten, DE;
Wolfgang Zacharias, Duisburg, DE;
Siemens Aktiengesellschaft, München, DE;
Abstract
A shaft seal for a turbomachine is provided for sealing process side of the turbomachine against the atmosphere. The shaft seal includes a process gas seal which is acted upon by a process gas and be blocked on the process side, an atmosphere seal which is acted upon by air and be blocked on the atmosphere side, and a ventilation chamber extending around the shaft of the turbomachine. The ventilation chamber is arranged between the process gas seal and the atmosphere seal for collecting and discharging a process gas leakage that has passed through the process gas seal and an air leakage that has passed through the atmosphere seal. The ventilation chamber includes a radially inner leakage inlet, a radially outward leakage outlet and built in components that are dimensioned to as to provide a flame blocking function with regard to ignition of the leakage at the leakage inlet.