Mitsubishi Heavy Industries Limited

Setunori Sakakibara

Eisaku Ito

Tanehiro Shinohara

Masanori Yuri

Kouichi Akagi

Yutaka Ozawa

Zenichi Yoshida

Yutaka Kawata

Nobuhiro Kunitake

Masahiko Toyoda

Takahiro Ohta

Koji Takeshita

Akihiro Kawaguchi

Hidehiko Nakane

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.

Shaft seal and turbine using the same

Growing community of inventors

Takasago, Japan

Setunori Sakakibara