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:
Sep. 04, 2018
Filed:
Jun. 05, 2014
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Koji Kawashima, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Chiyoda-Ku, Tokyo, JP;
Abstract
The present invention achieves oil amount reduction and size reduction in a seal oil supply device for rotating electric machine by suppressing expansion of a rotary shaft due to its temperature increase and reducing the gap between the rotary shaft and a seal ring in normal operation. In this seal oil supply device for rotating electric machine, seal oil is supplied from a seal oil pump to a seal ring of a rotating electric machine in which hydrogen gas is sealed, via a differential pressure regulation valve for regulating a pressure of the seal oil. A first route is provided for supplying the seal oil from the seal oil pump via the differential pressure regulation valve, and in addition, a second route is provided for supplying the seal oil from the seal oil pump via a relief valve.