JPS5797965A - Magnetic fluid sealing device - Google Patents

Magnetic fluid sealing device

Info

Publication number
JPS5797965A
JPS5797965A JP55171578A JP17157880A JPS5797965A JP S5797965 A JPS5797965 A JP S5797965A JP 55171578 A JP55171578 A JP 55171578A JP 17157880 A JP17157880 A JP 17157880A JP S5797965 A JPS5797965 A JP S5797965A
Authority
JP
Japan
Prior art keywords
yoke
shaft
magnetic fluid
minute gap
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP55171578A
Other languages
Japanese (ja)
Other versions
JPS6048668B2 (en
Inventor
Reizo Kaneko
Shigemitsu Oguchi
Kunio Hoshitani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP55171578A priority Critical patent/JPS6048668B2/en
Publication of JPS5797965A publication Critical patent/JPS5797965A/en
Publication of JPS6048668B2 publication Critical patent/JPS6048668B2/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid
    • F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force

Abstract

PURPOSE:To reduce the loss of a magnetic fluid due to its evaporation by forming an oil repelling film on the side surface of a yoke and the surface of a shaft in proximity of a minute gap between the yoke and the shaft. CONSTITUTION:An oil repelling film 4 is formed on the side surface of a yoke 1 and the surface of a shaft 2 in proximity of a minute gap between the yoke 1 and the shaft 2, said oil repelling film being more effective when it is made of a fluorocarbon polymer such as Teflon and the like but can be of other material. Thus a magnetic fluid 3 is held only in the minute gap between the yoke 2 and the shaft 2 and the area of the magnetic fluid 3 in contact with the surrounding air is substantially reduced as compared with the conventional magnetic seal. The force which holds the magnetic force also becomes stronger as it is only held in the minute gap between the yoke 1 and the shaft 2 where the magnetic flux density is high.
JP55171578A 1980-12-05 1980-12-05 magnetic fluid seal Expired JPS6048668B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55171578A JPS6048668B2 (en) 1980-12-05 1980-12-05 magnetic fluid seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55171578A JPS6048668B2 (en) 1980-12-05 1980-12-05 magnetic fluid seal

Publications (2)

Publication Number Publication Date
JPS5797965A true JPS5797965A (en) 1982-06-17
JPS6048668B2 JPS6048668B2 (en) 1985-10-29

Family

ID=15925741

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55171578A Expired JPS6048668B2 (en) 1980-12-05 1980-12-05 magnetic fluid seal

Country Status (1)

Country Link
JP (1) JPS6048668B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5974520A (en) * 1982-10-21 1984-04-27 Sumitomo Electric Ind Ltd Observing method of optical fiber end face
JPS63123868U (en) * 1987-02-04 1988-08-11

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5825954B2 (en) * 2011-09-26 2015-12-02 日東電工株式会社 Surface treatment device and magnetic seal type current introduction terminal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5974520A (en) * 1982-10-21 1984-04-27 Sumitomo Electric Ind Ltd Observing method of optical fiber end face
JPS63123868U (en) * 1987-02-04 1988-08-11

Also Published As

Publication number Publication date
JPS6048668B2 (en) 1985-10-29

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