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:
Dec. 07, 2021
Filed:
Aug. 18, 2021
Tsinghua University, Beijing, CN;
TSINGHUA UNIVERSITY, Beijing, CN;
Abstract
A magnetic fluid sealing device includes: a housing; a shaft rotatably penetrating through the housing; a first shaft sleeve made of a magnetic conductive material, and fitted over the shaft; a plurality of pole shoes arranged in the housing and fitted over the shaft and the first shaft sleeve, an inner circumferential surface of the pole shoe being provided with a plurality of pole teeth arranged at intervals in an axial direction of the shaft, the shaft and a first part of the plurality of pole teeth being arranged at intervals in a radial direction of the shaft to form a first gap, the first shaft sleeve and a second part of the plurality of pole teeth being arranged at intervals in the radial direction of the shaft to form a second gap; and a permanent magnet arranged in the housing and fitted over the shaft.