Sealing mechanism employing magnetic fluid

Abstract

Abstract PURPOSE:To ensure the sealing of a shaft movable in the axial direction, by disposing two cylinders between the movable shaft and a housing coaxially to the shaft, and holding a magnetic fluid in a part of each of the clearances between the shaft and the cylinders. CONSTITUTION:An inner cylinder 7 and an outer cylinder 8 are disposed in the space between the inside circumferential surfaces of yokes 4 and the outside circumferential surface of a movable shaft 2, coaxially to the shaft, in such a manner that the cylinders are overlapped with each other in the axial direction. One end of the inner cylinder 7 is gas-tightly secured on a housing 3, while the opposite end of the outer cylinder 8 is gas-tightly secured on the movable shaft 2. A magnetic fluid 1 is held within a space in a magnetic circuit constituted by a permanent magnet 5, the yokes 4, the inner and outer cylinders 7, 8, the movable shaft 2, etc.

Inventors

• 👤 Sadao Takahashi
• 👤 高橋　貞男
• 👤 Shojiro Miyake
• 👤 正二郎 三宅

Bibliographic Details