JPS54108161A - Magnetic fluid seal - Google Patents

Magnetic fluid seal

Info

Publication number
JPS54108161A
JPS54108161A JP1628278A JP1628278A JPS54108161A JP S54108161 A JPS54108161 A JP S54108161A JP 1628278 A JP1628278 A JP 1628278A JP 1628278 A JP1628278 A JP 1628278A JP S54108161 A JPS54108161 A JP S54108161A
Authority
JP
Japan
Prior art keywords
shaft
magnetic
permanent magnet
magnetic fluid
pole
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.)
Pending
Application number
JP1628278A
Other languages
Japanese (ja)
Inventor
Tadatoshi Yamada
Masao Morita
Masatami Iwamoto
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1628278A priority Critical patent/JPS54108161A/en
Publication of JPS54108161A publication Critical patent/JPS54108161A/en
Pending 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 maintain seal by producing a magnetic flux with a permanent magnet and an electromagnet in a small gap between a rotating shaft and a stationary magnetic pole. CONSTITUTION:A coil 7 provided on the side of a permanent magnet 4 nearer a shaft 1 and surrounding the shaft 1 constitutes a permanent magnet. By energizing the coil 7 a strong magnetic field with a flux density of 10,000 gausses can be established by the permanent magnet 4 and the electromagnet in a small gap between the shaft 1 and a magnetic pole 2 or 3. Thus, the magnetic restraining force acting upon the magnetic fluid 5 is increased, so that even by rotating the shaft 1 at a high speed the magnetic fluid 5 is not flung out by centrifugal forces, and the possibility of lose of the seal in the gap between the pole 2 or 3 and shaft 1 is eliminated.
JP1628278A 1978-02-14 1978-02-14 Magnetic fluid seal Pending JPS54108161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1628278A JPS54108161A (en) 1978-02-14 1978-02-14 Magnetic fluid seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1628278A JPS54108161A (en) 1978-02-14 1978-02-14 Magnetic fluid seal

Publications (1)

Publication Number Publication Date
JPS54108161A true JPS54108161A (en) 1979-08-24

Family

ID=11912188

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1628278A Pending JPS54108161A (en) 1978-02-14 1978-02-14 Magnetic fluid seal

Country Status (1)

Country Link
JP (1) JPS54108161A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4407508A (en) * 1982-12-16 1983-10-04 Ferrofluidics Corporation Single-pole-piece ferrofluid seal apparatus and exclusion seal system
JPH0311176U (en) * 1989-06-20 1991-02-04
US4995622A (en) * 1989-02-07 1991-02-26 Nippon Pillar Packing Co., Ltd. Magnetic fluid seal device
CN104534100A (en) * 2015-01-08 2015-04-22 北京交通大学 Novel method for increasing high linear speed and prolonging sealing life of static magnetic liquid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4407508A (en) * 1982-12-16 1983-10-04 Ferrofluidics Corporation Single-pole-piece ferrofluid seal apparatus and exclusion seal system
US4995622A (en) * 1989-02-07 1991-02-26 Nippon Pillar Packing Co., Ltd. Magnetic fluid seal device
JPH0311176U (en) * 1989-06-20 1991-02-04
CN104534100A (en) * 2015-01-08 2015-04-22 北京交通大学 Novel method for increasing high linear speed and prolonging sealing life of static magnetic liquid

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