JPS55103161A - Shaft seal - Google Patents

Shaft seal

Info

Publication number
JPS55103161A
JPS55103161A JP923479A JP923479A JPS55103161A JP S55103161 A JPS55103161 A JP S55103161A JP 923479 A JP923479 A JP 923479A JP 923479 A JP923479 A JP 923479A JP S55103161 A JPS55103161 A JP S55103161A
Authority
JP
Japan
Prior art keywords
permanent magnet
magnetic
electromagnet
clearance
magnetic fluid
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
JP923479A
Other languages
Japanese (ja)
Other versions
JPS6129431B2 (en
Inventor
Muneo Mizumoto
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP923479A priority Critical patent/JPS55103161A/en
Publication of JPS55103161A publication Critical patent/JPS55103161A/en
Publication of JPS6129431B2 publication Critical patent/JPS6129431B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

PURPOSE:To get a shaft seal available under a wide range of sealing conditions, by flling a converx clearance between stationary and rotary members with magnetic fluid, while setting a permanent magnet to the rotary member and an electromagnet to the extenal circumference above the clearance. CONSTITUTION:An annular permanent magnet 5, fixed to a rotary shaft 1 through a non-magnetic substance 6, is put in an annular space between two annular magnetic substances 3 to form a convex clearance 7. This clearance is filled with magnetic fluid 8 around its top, while an electromagnet 9 is set between a partition wall 4 and the internal wall 2a of a casing 2. If high shaft sealing performance is required, the electromagnet 9 is energized. The interaction between the electromagnet 9 and permanent magnet 5 then preduces a magnetic field counterclockwise and the magnetic force working on the magnetic fluid 8 exceeds that produced by the permanent magnet 5 alone. This converges the magnetic fluid 8 around the permanent magnet 5 to improve the sealing performance.
JP923479A 1979-01-31 1979-01-31 Shaft seal Granted JPS55103161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP923479A JPS55103161A (en) 1979-01-31 1979-01-31 Shaft seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP923479A JPS55103161A (en) 1979-01-31 1979-01-31 Shaft seal

Publications (2)

Publication Number Publication Date
JPS55103161A true JPS55103161A (en) 1980-08-07
JPS6129431B2 JPS6129431B2 (en) 1986-07-07

Family

ID=11714706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP923479A Granted JPS55103161A (en) 1979-01-31 1979-01-31 Shaft seal

Country Status (1)

Country Link
JP (1) JPS55103161A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1925861A2 (en) * 2006-11-22 2008-05-28 Fanuc Ltd Waterproof/dustproof structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1925861A2 (en) * 2006-11-22 2008-05-28 Fanuc Ltd Waterproof/dustproof structure
EP1925861A3 (en) * 2006-11-22 2008-07-23 Fanuc Ltd Waterproof/dustproof structure

Also Published As

Publication number Publication date
JPS6129431B2 (en) 1986-07-07

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