Title:
MAGNETIC-FLUID-SEALING-TYPE SHAFT
Document Type and Number:
WIPO Patent Application WO/2023/019784
Kind Code:
A1
Abstract:
A magnetic-fluid-sealing-type shaft, comprising a shaft sleeve and a shaft body, wherein the shaft body is mounted in the shaft sleeve, the shaft body can rotate relative to the shaft sleeve, and a magnetic fluid is provided between the shaft body and the shaft sleeve for sealing. The magnetic-fluid-sealing-type shaft further comprises a retractable component, the retractable component comprising a retractable shaft, wherein the retractable shaft is arranged in the shaft body, and is capable of extending or retracting relative to the shaft body. The retractable shaft and the shaft body are independent of each other, wherein the shaft body is configured to be fitted with the shaft sleeve to achieve rotary sealing, and the retractable shaft is configured to output linear displacement, such that the shaft body does not participate in the output of the linear displacement. In this way, the rotary sealing between the shaft body and the shaft sleeve is not affected, and the introduction of the retractable shaft can remedy the defect whereby a conventional magnetic-fluid-sealing-type shaft cannot output linear displacement; in addition, the retractable shaft is designed to be arranged in the shaft body, such that the occupation of external space of the magnetic-fluid-sealing-type shaft can be avoided, the size of an apparatus can be reduced, and the integration level of the apparatus can be improved.
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Inventors:
GAO QIANG (CN)
WANG CHENGYI (CN)
ZHANG HUAIDONG (CN)
HU DONGDONG (CN)
CHENG SHIRAN (CN)
LIU HAIYANG (CN)
GUO SONG (CN)
XU KAIDONG (CN)
WANG CHENGYI (CN)
ZHANG HUAIDONG (CN)
HU DONGDONG (CN)
CHENG SHIRAN (CN)
LIU HAIYANG (CN)
GUO SONG (CN)
XU KAIDONG (CN)
Application Number:
PCT/CN2021/132019
Publication Date:
February 23, 2023
Filing Date:
November 22, 2021
Export Citation:
Assignee:
JIANGSU LEUVEN INSTR CO LTD (CN)
International Classes:
F16C3/03; F16J15/43; F16J15/52
Foreign References:
| US4669362A | 1987-06-02 | |||
| JP2012237341A | 2012-12-06 | |||
| CN107725785A | 2018-02-23 | |||
| CN105979989A | 2016-09-28 | |||
| CN201218375Y | 2009-04-08 | |||
| CN202561338U | 2012-11-28 | |||
| US20080282878A1 | 2008-11-20 | |||
| DE3632677A1 | 1988-04-07 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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