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. 05, 2002
Filed:
Mar. 13, 2000
Tanehiro Shinohara, Takasago, JP;
Kouichi Akagi, Takasago, JP;
Masanori Yuri, Takasago, JP;
Masahiko Toyoda, Takasago, JP;
Yutaka Ozawa, Takasago, JP;
Akihiro Kawaguchi, Takasago, JP;
Setunori Sakakibara, Takasago, JP;
Zenichi Yoshida, Takasago, JP;
Nobuhiro Kunitake, Takasago, JP;
Takahiro Ohta, Takasago, JP;
Hidehiko Nakane, Kobe, JP;
Eisaku Ito, Takasago, JP;
Yutaka Kawata, Takasago, JP;
Koji Takeshita, Takasago, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A shaft seal having a high abrasion resistance is disclosed, by which the leakage of the gas from the high-pressure side to the low-pressure side can be reduced. In the shaft seal, flexible leaves are multi-layered to form a ring shape. The shaft seal is mainly arranged around the rotation shaft of a gas turbine or the like. The relevant turbine comprises a casing, a compressor, a rotation shaft, moving blades attached to the rotation shaft, and stationary blades attached to the casing in a manner such that the stationary blades face the moving blades, wherein the shaft seals are provided between a plurality of stationary blades and the rotation shaft wherein the leaves of each shaft seal contact the rotation shaft. Under the rated operating conditions, the top ends of the leaves slightly separate from the surface of the rotation shaft due to the dynamic pressure generated by the rotation of the rotation shaft. When the turbine is not operated, the top ends of the leaves contact the rotation shaft again due to the elastic restoring force of the leaves.