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. 05, 2013
Filed:
Jun. 25, 2009
Kazuyuki Yamaguchi, Kasumigaura, JP;
Yohei Magara, Mito, JP;
Toyomi Yoshida, Kasumigaura, JP;
Michiyuki Takagi, Ushiku, JP;
Kenichi Murata, Hitachi, JP;
Takeshi Kudo, Hitachinaka, JP;
Kazuyuki Yamaguchi, Kasumigaura, JP;
Yohei Magara, Mito, JP;
Toyomi Yoshida, Kasumigaura, JP;
Michiyuki Takagi, Ushiku, JP;
Kenichi Murata, Hitachi, JP;
Takeshi Kudo, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A turbomachinery includes a labyrinth seal () to prevent unstable vibration of a rotor formed by dividing the seal into segments () in a circumferential direction and combining the segments () whose comb teeth () differ in height. The labyrinth seal () preferably includes two kinds of segments () whose comb teeth () differ in height for each kind of segment, and the segments () of the greater comb tooth height are arranged in a certain reference direction on a cross section right-angled to a rotational axis, and in a direction opposite to the reference direction, and the segments () of the smaller comb tooth height are arranged in a direction right-angled to the reference direction, and in a direction opposite to that right-angled to the reference direction.