Title:
SEALING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/134206
Kind Code:
A1
Abstract:
Disclosed is a sealing device. The sealing device is mounted between a first workpiece and a second workpiece, which can rotate relative to each other, for dynamic sealing. The sealing device comprises a framework (1), an elastic sealing body (2) and a dust cover (3), which are annularly and coaxially arranged, wherein the framework and the dust cover can rotate relative to each other; and the elastic sealing body is fixed on the framework and extends towards the dust cover, such that the elastic sealing body is in sealing fit with the dust cover. The sealing device divides both axial sides thereof into an external side (O) and a sealing side (I). The sealing device further comprises a rotation speed sensor (5) fixed on the framework, a retaining ring (4) fixed together with the dust cover, and a magnetic encoder (6) fixed on the retaining ring. The magnetic encoder faces the rotation speed sensor, such that the rotation speed sensor may measure the rotation speed of the retaining ring relative to the framework by means of the magnetic encoder. The sealing device may measure the rotation speed and has a reliable sealing effect.
Inventors:
LIU XIN (CN)
WU LIJUAN (CN)
SONG HONGWEI (CN)
LIU ZHIHENG (CN)
DENG DAWEI (CN)
XU XIAOBIN (CN)
WU LIJUAN (CN)
SONG HONGWEI (CN)
LIU ZHIHENG (CN)
DENG DAWEI (CN)
XU XIAOBIN (CN)
Application Number:
PCT/CN2019/129903
Publication Date:
July 08, 2021
Filing Date:
December 30, 2019
Export Citation:
Assignee:
SCHAEFFLER TECHNOLOGIES AG (DE)
International Classes:
F16C33/80; F16J15/326
Foreign References:
| US20040046328A1 | 2004-03-11 | |||
| US5969518A | 1999-10-19 | |||
| EP2093574B1 | 2012-09-05 | |||
| US6559633B1 | 2003-05-06 | |||
| JP2006038160A | 2006-02-09 | |||
| CN103542097A | 2014-01-29 | |||
| CN104228459A | 2014-12-24 |
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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