WO1988008495A1 - Dispositif d'etancheite a plusieurs etages avec du ferrofluide - Google Patents

Dispositif d'etancheite a plusieurs etages avec du ferrofluide Download PDF

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Publication number
WO1988008495A1
WO1988008495A1 PCT/DE1988/000214 DE8800214W WO8808495A1 WO 1988008495 A1 WO1988008495 A1 WO 1988008495A1 DE 8800214 W DE8800214 W DE 8800214W WO 8808495 A1 WO8808495 A1 WO 8808495A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
sealing
filled
sealing device
plastic
Prior art date
Application number
PCT/DE1988/000214
Other languages
German (de)
English (en)
Inventor
Iris Diesing
Original Assignee
Iris Diesing
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 Iris Diesing filed Critical Iris Diesing
Priority to KR1019880701724A priority Critical patent/KR900700802A/ko
Priority to JP50281688A priority patent/JPH02503705A/ja
Publication of WO1988008495A1 publication Critical patent/WO1988008495A1/fr
Priority to DK719888A priority patent/DK719888D0/da
Priority to FI885967A priority patent/FI885967A/fi

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
    • 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

Definitions

  • FIG. 1 There are multi-stage sealing devices with ferrofluid on the market which are produced according to FIG. 1 according to patent DE 2034213 C3. These consist of several rod permanent magnets or an axially magnetized permanent magnet ring (1) distributed around the shaft made of magnetizable stainless steel (5), and two pole rings made of magnetizable stainless steel (2) sealed with respect to the housing (4) with O-rings (3). Either the shaft (5) or the pole rings (2) are provided with sealing steps (7) for guiding the magnetic flux, the sealing step gaps being filled with ferrofluid (6) to achieve a gas-tight seal between the left and the right seal side.
  • the magnetic flux closes as indicated in FIG. 1 by field lines provided with directional arrows: permanent magnet ring (1) - right pole ring made of magnetizable stainless steel (2) - ferrofluid in the right sealing stage columns (6) - right sealing stages (7) - shaft made of magnetizable stainless steel (5) - left sealing steps (7) - ferrofluid in the left sealing step columns (6) - left pole ring magnetizable stainless steel (2) - permanent magnet ring (1).
  • This sealing device has the following disadvantages:.
  • the pole rings * must be sealed against the housing with O-rings.
  • the pole rings must be fixed to their seats with fasteners.
  • the shaft must be made of expensive stainless steel or at least a stainless steel bushing must be attached to the shaft.
  • the plastic material used is compared to the previously used magnetic material and the stainless steel material and processing much cheaper.
  • the plastic material used can at the same time make the static sealing with respect to the housing, which was previously done by O-rings.
  • REPLACEMENT LEAF 5 Because of the simple handling of the plastic block, which is simply pressed into the housing, the user can normally manufacture the shaft to be sealed (for example, a rotating union) and only the sealing element from a closed block made of plastic filled with magnetic particles and, if necessary buy a socket made of plastic filled with magnetic particles in addition to the ferrofluid.
  • the invention is therefore very suitable as a catalog item.
  • FIG 1 shows the prior art
  • FIG. 2 shows, according to patent claim 1, the sealing element consisting of a closed block made of plastic filled with magnetic particles, pressed into a housing (6).
  • the sealing element has no sealing steps. Rather, they are attached to the surface of the shaft made of magnetizable material.
  • FIG. 3 shows the sealing element consisting of a closed block made of plastic filled with magnetic particles.
  • the sealing steps are attached to the inner diameter of the sealing element.
  • REPLACEMENT LEAF Figure 4 shows according to claim 2, the multi-stage sealing device according to claim 1 with a mounted on the shaft sleeve made of plastic filled with magnetic particles.
  • the shaft can be made of non-magnetic material.
  • the sealing steps are applied to the surface of the bush.
  • FIG. 5 shows an embodiment with sealing stages attached to the inside diameter of the sealing element.
  • Figure 6 shows a sealing device according to Patent ⁇ claims 1 and 3.
  • the sealing element made of a closed block made of plastic filled with magnetic particles is pressed onto the shaft, the sealing stages are attached to the outer diameter of the sealing element, the magnetic circuit closes via the bush pressed into the housing made of plastic filled with magnetic particles.
  • FIG. 7 shows an exemplary embodiment according to patent claims 1 and 3, the sealing steps being located on the inside diameter of the
  • REPLACEMENT LEAF pressed shaft made of plastic filled with magnetic particles made of plastic filled with magnetic particles.
  • Figure 8 explains claims 5 and 6. Both in the sealing element according to claim 1 and in the bushings according to claim 2 (via the shaft) and claim 3 (in the housing) spring elements (1), reinforcements (2), separate axial magnets (3) and separate radial magnets (4) can be inserted.
  • FIG. 9 shows an exemplary embodiment according to patent claims 1 and 2.
  • the multi-stage sealing device is installed between two ball bearings in a rotary feedthrough, which transmits, for example, a rotary movement in a gas-tight sealed manner.
  • FIG. 10 shows an exemplary embodiment according to claim 1.
  • the multi-stage sealing device is installed, for example, in a rotary feedthrough which, for example, transmits rotary movements in a gas-tight manner in a crystal pulling system.
  • the multi-stage sealing device is installed, for example, in a rotary feedthrough which, for example, transmits rotary movements in a gas-tight manner in a crystal pulling system.
  • the multi-stage sealing device is installed, for example, in a rotary feedthrough which, for example, transmits rotary movements in a gas-tight manner in a crystal pulling system.
  • FIG 11 explains the claim 4.
  • the multi-stage sealing element made of a closed block made of plastic filled with magnetic particles consists of several magnetic areas. In this exemplary embodiment there are three magnetic areas, but there can be any number.
  • the field lines provided with directional arrows explain the closed magnetic flow.
  • Figure 12 explains claim 4 in conjunction with claim 3.
  • a bushing made of plastic filled with magnetic particles is pressed into the housing and carries the sealing steps on the inside diameter.

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

Un élément d'étanchéité aimanté creux composé d'un bloc fermé en plastique rempli de particules magnétiques et comprimé dans un logement comprend un arbre rotatif en matériau aimantable. Entre les étages d'étanchéité, qui guident le flux magnétique, et la surface de l'arbre, se trouve du ferrofluide, un fluide magnétique, ce qui permet de créer une étanchéité aux gaz entre le côté gauche et le côté droit de l'élément d'étanchéité creux. Par rapport à l'état de la technique, le nombre de composants est réduit, la manipulation est simplifiée et les coûts de production et en matériaux sont réduits.
PCT/DE1988/000214 1987-04-23 1988-03-31 Dispositif d'etancheite a plusieurs etages avec du ferrofluide WO1988008495A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019880701724A KR900700802A (ko) 1987-04-23 1988-03-31 철 함유 유체를 가진 다단계 밀봉장치
JP50281688A JPH02503705A (ja) 1988-03-31 1988-03-31 流動鉄を用いた多段式シーリング装置
DK719888A DK719888D0 (da) 1988-03-31 1988-12-23 Flertrins-taetningsindretning med ferrofluid
FI885967A FI885967A (fi) 1987-04-23 1988-12-23 Flerstegs taetningsanordning med ferrovaetska.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3713567A DE3713567C1 (de) 1987-04-23 1987-04-23 Mehrstufige Dichtungsvorrichtung mit Ferrofluid
DEP3713567.8 1987-04-24

Publications (1)

Publication Number Publication Date
WO1988008495A1 true WO1988008495A1 (fr) 1988-11-03

Family

ID=6326116

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1988/000214 WO1988008495A1 (fr) 1987-04-23 1988-03-31 Dispositif d'etancheite a plusieurs etages avec du ferrofluide

Country Status (5)

Country Link
EP (1) EP0312554A1 (fr)
KR (1) KR900700802A (fr)
DE (1) DE3713567C1 (fr)
FI (1) FI885967A (fr)
WO (1) WO1988008495A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5134331A (en) * 1990-05-31 1992-07-28 Nippon Densan Corporation Spindle motor
US7129609B1 (en) * 2005-08-30 2006-10-31 Ferrolabs, Inc. Magneto-fluidic seal with wide working temperature range

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH674887A5 (fr) * 1986-06-10 1990-07-31 Papst Motoren Gmbh & Co Kg
DE3807893C2 (de) * 1988-03-10 1994-02-24 Freudenberg Carl Fa Dichtung für eine magnetisierbare Welle
DE3822198A1 (de) * 1988-04-09 1989-10-19 Lechler Elring Dichtungswerke Magnetische dichtungsvorrichtung
US5975536A (en) * 1997-09-30 1999-11-02 Rigaku/Usa, Inc. Rotary motion feedthrough with rotating magnet system
DE102006051992B3 (de) * 2006-11-03 2008-01-31 Dtg - Development & Technology Gmbh Magnetflüssigkeitsdichtung zur Abdichtung einer Welle oder Achse gegenüber einer Nabe
CN106122285B (zh) * 2016-09-09 2018-03-20 广西科技大学 一种圆锥式磁流体密封装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4171818A (en) * 1977-04-04 1979-10-23 Ferrofluidics Corporation Dynamic lip seal using ferrofluids as sealant/lubricant
US4502700A (en) * 1984-05-03 1985-03-05 Ferrofluidics Corporation Ferrofluid linear seal apparatus
US4526382A (en) * 1984-05-03 1985-07-02 Ferrofluidics Corporation Radially polarized multiple-stage ferrofluid seal apparatus
US4531846A (en) * 1983-12-27 1985-07-30 Ferrofluidics Corporation Compact ferrofluid seal and bearing assembly
EP0210527A1 (fr) * 1985-07-24 1987-02-04 Hitachi, Ltd. Joint d'étanchéité à fluide magnétique
DE8705884U1 (de) * 1987-04-23 1987-06-19 Diesing, Iris, 7140 Ludwigsburg Mehrstufige Dichtungsvorrichtung mit Ferrofluid
DE3644697C1 (de) * 1986-12-30 1988-02-11 Manfred Dipl-Ing Diesing Dichtungsvorrichtung mit Ferrofluid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2034213C3 (de) * 1969-10-10 1985-04-25 Ferrofluidics Corp., Burlington, Mass. Magnetdichtung zur Abdichtung von Dichtungsspalten

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4171818A (en) * 1977-04-04 1979-10-23 Ferrofluidics Corporation Dynamic lip seal using ferrofluids as sealant/lubricant
US4531846A (en) * 1983-12-27 1985-07-30 Ferrofluidics Corporation Compact ferrofluid seal and bearing assembly
US4502700A (en) * 1984-05-03 1985-03-05 Ferrofluidics Corporation Ferrofluid linear seal apparatus
US4526382A (en) * 1984-05-03 1985-07-02 Ferrofluidics Corporation Radially polarized multiple-stage ferrofluid seal apparatus
EP0210527A1 (fr) * 1985-07-24 1987-02-04 Hitachi, Ltd. Joint d'étanchéité à fluide magnétique
DE3644697C1 (de) * 1986-12-30 1988-02-11 Manfred Dipl-Ing Diesing Dichtungsvorrichtung mit Ferrofluid
DE8705884U1 (de) * 1987-04-23 1987-06-19 Diesing, Iris, 7140 Ludwigsburg Mehrstufige Dichtungsvorrichtung mit Ferrofluid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5134331A (en) * 1990-05-31 1992-07-28 Nippon Densan Corporation Spindle motor
US7129609B1 (en) * 2005-08-30 2006-10-31 Ferrolabs, Inc. Magneto-fluidic seal with wide working temperature range
US7398974B1 (en) 2005-08-30 2008-07-15 Ferrolabs, Inc. Magneto-fluidic seal with wide working temperature range

Also Published As

Publication number Publication date
KR900700802A (ko) 1990-08-17
DE3713567C1 (de) 1987-12-03
FI885967A (fi) 1988-12-23
EP0312554A1 (fr) 1989-04-26

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