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WO2009156260A1 - Joint d’étanchéité à cassette - Google Patents

Joint d’étanchéité à cassette Download PDF

Info

Publication number
WO2009156260A1
WO2009156260A1 PCT/EP2009/056971 EP2009056971W WO2009156260A1 WO 2009156260 A1 WO2009156260 A1 WO 2009156260A1 EP 2009056971 W EP2009056971 W EP 2009056971W WO 2009156260 A1 WO2009156260 A1 WO 2009156260A1
Authority
WO
WIPO (PCT)
Prior art keywords
disc
sealing
centrifugal
centrifugal disc
radial
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.)
Ceased
Application number
PCT/EP2009/056971
Other languages
German (de)
English (en)
Inventor
Wolfgang Schmidt-Aursch
Thomas Gietl
Thomas Fuchshuber
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.)
IHO Holding GmbH and Co KG
Original Assignee
Schaeffler KG
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 Schaeffler KG filed Critical Schaeffler KG
Publication of WO2009156260A1 publication Critical patent/WO2009156260A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F16C33/7883—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/768—Sealings of ball or roller bearings between relatively stationary parts, i.e. static seals
    • 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
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking 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
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
    • F16J15/3264—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals the elements being separable from each other

Definitions

  • the invention relates to a cartridge seal, which is placed between two coaxially arranged and rotatable relative to each other elements of an assembly for sealing an interior of the assembly and which consists of an axially inwardly disposed sealing washer and in the axial direction outboard arranged centrifugal disc with substantially L- composed cross-sections, wherein the sealing disc and the centrifugal disc define a rectangular surface with radial extensions of their cross-sections, while they are each connected with axial extensions of their cross-sections with the associated element of the assembly, and the sealing disc has at least one sealing lip, which is used to seal the Interior is in contact with the centrifugal disc.
  • a cassette seal is usually composed of a sealing washer with sealing lips and a front mounted centrifugal disc. The sealing disc prevents the transition of the media between the two separate spaces via the contact force of the sealing lips, while the centrifugal disc causes a rejection of the media striking the seal from the outside during rotation due to the centrifugal force.
  • a sealing system in cassette construction for a rolling bearing which is composed of a sealing washer and a centrifugal disc, which each have almost L-shaped cross-sections.
  • the sealing washer is in communication with an outer ring of the rolling bearing, while the centrifugal disc is placed on an inner ring and placed in the axial direction in front of the sealing washer.
  • Radiale, in the space between the inner ring and outer ring of the rolling element protruding extensions define a rectangular surface of the sealing system.
  • the sealing disk has three elastomer sealing lips, one of which is in axial contact with the centrifugal disk and two in the radial direction.
  • a disadvantage of such a design is that a high contact pressure of the sealing lip is necessary to ensure sufficient tightness at standstill of the system.
  • a high contact pressure of the sealing lips causes high friction and thus high losses, in particular at high relative rotational speeds of the elements between which the sealing system is arranged.
  • a high degree of friction ensures that the gasket is worn to a great extent and, accordingly, that the service life and / or service life is reduced. permanently.
  • the invention is therefore the object of the invention to provide a cartridge seal, which ensures a secure seal both at standstill of the system and at high speeds and in which at increased speed, the friction considerably is minimized.
  • the invention comprises the technical teaching that the centrifugal disc has a sealing lip on the inside of its radial extent, which is in contact with the radial extent of the sealing disc at a standstill or at low rotational speeds. From a defined speed, this sealing lip lifts due to acting centrifugal forces from the sealing disc in the radial direction and accordingly does not provide for friction.
  • the sealing lip of the centrifugal disc at standstill or low speeds at which the centrifugal disc due to no or a very low centrifugal force does not provide sufficient rejection of coming from outside media contributes to a reliable seal, while at higher speeds at which the Centrifugal disc then due to a higher centrifugal force reliably ensures rejection, no longer contributes to friction.
  • the centrifugal disc on the outside of its radial extent on an axially outwardly directed crank.
  • an improvement of the Abschleuder für the centrifugal disc is achieved.
  • at least one auxiliary seal is provided in the connection region of the sealing disk and / or the centrifugal disk with the respective associated element. This has the advantage that infiltration of the connection between the respective element and the corresponding pane by media from inside and / or outside is prevented.
  • the centrifugal disk is along its radial
  • the sealing disc and the centrifugal disc are respectively pressed into the associated element. This ensures a reliable seat of the seal at the desired location.
  • the centrifugal disc and / or the sealing disc made of stainless steel.
  • the advantage here is that the respective disc thus has a high load capacity and further insensitive to the effects of particular liquid or gaseous media.
  • the secondary seals and / or the sealing lips made of an elastomeric material and are firmly connected to the centrifugal disc and the sealing disc.
  • FIGURE shows a sectional view of an arrangement of the cassette seal according to the invention.
  • the drawing clearly shows a cassette seal which is placed between two coaxially arranged elements 1 and 2 rotatable relative to one another. It will be clear to those skilled in the art that these elements can be a housing and a shaft, but also the outer ring and the inner ring of a roller bearing.
  • the cassette seal consists of a sealing disc 3 and a centrifugal disc 4, which each have a substantially L-shaped cross-section. To counteract an axial movement of the cassette seal, the sealing disc 3 is pressed into element 1 and the centrifugal disc 4 in element 2. At its radial extent 5, the sealing disc 3 further comprises a sealing lip 6 which is in radial contact with the centrifugal disc 4 in contact.
  • the centrifugal disc 4 has on the inside of its radial extent 7 via a sealing lip 8, which conforms in the axial direction of the sealing disc 3.
  • This sealing lip 8 has the peculiarity that it lifts off the contact with the sealing disc 3 from a certain speed of the element 2 and thus the centrifugal disc 4 and thus causes no friction. At low speeds or standstill of element 2, however, it ensures a reliable seal.
  • side seals 9 and 10 are provided in these connection areas.
  • the secondary seal 9 in the region of the centrifugal disk 4 is arranged on its axial outside and thus predominantly for protection against external influences, while the secondary seal 10 of the sealing disk 3 predominantly for preventing leakage of a medium, such as lubricant, from an interior of the system at the axial inside is placed. Furthermore, the centrifugal disc 4 at the end of its radial extent 7 a crank 11 in order to further improve the Abschleuder Gold. LIST OF REFERENCE NUMBERS

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

L'invention concerne un joint d'étanchéité à cassette qui est placé entre deux éléments (1, 2) d'un module disposés coaxialement et de manière à pouvoir tourner l'un par rapport à l'autre et qui est destiné à rendre étanche l'intérieur du module. Le joint d'étanchéité à cassette se compose d'un disque d'étanchéité (3) disposé à l'intérieur en direction axiale et d'un disque centrifuge (4) disposé à l'extérieur en direction axiale, avec des sections transversales essentiellement en forme de L, le disque d'étanchéité (3) et le disque centrifuge (4) définissant avec des extensions radiales (5, 7) de leurs sections transversales une surface rectangulaire, tandis qu'ils sont respectivement reliés fixement par des extensions axiales de leurs sections transversales à l'élément associé (1; 2) du module, et le disque d'étanchéité (3) présentant au moins une lèvre d'étanchéité (6) qui est en contact avec le disque centrifuge (4) pour rendre étanche l'intérieur. Selon l'invention, le disque centrifuge (4) présente sur le côté intérieur de son extension radiale (7) une lèvre d'étanchéité (8) qui est en contact en direction axiale avec l'extension radiale (5) du disque d'étanchéité (3) quand l'élément (2) relié au disque centrifuge (4) est à l'arrêt ou tourne à petite vitesse, tandis qu'il se soulève du disque d'étanchéité (3) en direction radiale à partir d'une vitesse définie en raison des forces centrifuges en action.
PCT/EP2009/056971 2008-06-27 2009-06-05 Joint d’étanchéité à cassette Ceased WO2009156260A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008030710.6 2008-06-27
DE200810030710 DE102008030710A1 (de) 2008-06-27 2008-06-27 Kassettendichtung

Publications (1)

Publication Number Publication Date
WO2009156260A1 true WO2009156260A1 (fr) 2009-12-30

Family

ID=40908469

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/056971 Ceased WO2009156260A1 (fr) 2008-06-27 2009-06-05 Joint d’étanchéité à cassette

Country Status (2)

Country Link
DE (1) DE102008030710A1 (fr)
WO (1) WO2009156260A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2529807A (en) * 2014-08-26 2016-03-09 Skf Ab Dynamic radial seal
CN109210087A (zh) * 2017-07-07 2019-01-15 斯凯孚公司 用于滚动轴承的密封装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010015200A1 (de) 2010-04-16 2011-10-20 Schaeffler Technologies Gmbh & Co. Kg Kasettendichtung
WO2011160657A1 (fr) * 2010-06-25 2011-12-29 Aktiebolaget Skf Joint à lèvre
DE102014216059A1 (de) 2014-08-13 2016-02-18 Schaeffler Technologies AG & Co. KG Dichtungsanordnung
DE102016212122A1 (de) 2016-07-04 2017-06-22 Schaeffler Technologies AG & Co. KG Dichtungsanordnung und Maschinenelementanordnung
DE102017110323A1 (de) * 2017-05-12 2018-11-15 Schaeffler Technologies AG & Co. KG Dichtungsanordnung
DE102017113391A1 (de) 2017-06-19 2018-12-20 Schaeffler Technologies AG & Co. KG Dichtungsanordnung und Laufring sowie Dichtungsanordnung mit diesem
DE102018107873B4 (de) 2018-04-04 2020-09-03 Schaeffler Technologies AG & Co. KG Anordnung mit Maschinenelementen und Dichtungsanordnung hierfür
DE102018125777A1 (de) 2018-10-17 2020-04-23 Schaeffler Technologies AG & Co. KG Wälzlager und Dichtung für ein Wälzlager
DE102022112274A1 (de) 2022-05-17 2023-11-23 Schaeffler Technologies AG & Co. KG Kassettendichtung und Wälzlager

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572516A (en) * 1985-06-12 1986-02-25 General Motors Corporation Low friction dynamic seal assembly with centrifugal deflection
EP1096187A2 (fr) * 1999-11-01 2001-05-02 Forsheda AB Joint d'etancheité et procédé pour la fabrication
JP2003049854A (ja) * 2001-08-03 2003-02-21 Koyo Seiko Co Ltd 密封装置
US20030230849A1 (en) * 2002-06-13 2003-12-18 Skf Industrie S.P.A. Sealing device with an integral encoder wheel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6817769B2 (en) 2002-09-30 2004-11-16 Emerson Power Transmission Manufacturing, L.P. Roller bearing having high performance bearing seal and cartridge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572516A (en) * 1985-06-12 1986-02-25 General Motors Corporation Low friction dynamic seal assembly with centrifugal deflection
EP1096187A2 (fr) * 1999-11-01 2001-05-02 Forsheda AB Joint d'etancheité et procédé pour la fabrication
JP2003049854A (ja) * 2001-08-03 2003-02-21 Koyo Seiko Co Ltd 密封装置
US20030230849A1 (en) * 2002-06-13 2003-12-18 Skf Industrie S.P.A. Sealing device with an integral encoder wheel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2529807A (en) * 2014-08-26 2016-03-09 Skf Ab Dynamic radial seal
US10054229B2 (en) 2014-08-26 2018-08-21 Aktiebolaget Skf Dynamic radial seal
CN109210087A (zh) * 2017-07-07 2019-01-15 斯凯孚公司 用于滚动轴承的密封装置
CN109210087B (zh) * 2017-07-07 2022-01-04 斯凯孚公司 用于滚动轴承的密封装置

Also Published As

Publication number Publication date
DE102008030710A1 (de) 2009-12-31

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