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:
Aug. 17, 2021
Filed:
Mar. 25, 2021
Tsinghua University, Beijing, CN;
TSINGHUA UNIVERSITY, Beijing, CN;
Abstract
A magnetic fluid sealing device is disclosed. The magnetic fluid sealing device includes a housing, a shaft, and a magnetic sealing member. The housing has a cavity containing a magnetic fluid. One end of the shaft extends out of the housing through a first through-hole. The outer peripheral face of the shaft is provided with liquid injection grooves with one end extending out of the housing. The magnetic sealing member is located within the sealing cavity and includes at least one magnetic source and a plurality of pole shoes. The plurality of pole shoes are arranged at intervals in a length direction of the housing. The magnetic source is connected between two adjacent pole shoes. A sealing gap in communication with the liquid injection groove is defined between the plurality of pole shoes and the shaft.