EP1038601A2 - Dichtungsanordnung - Google Patents

Dichtungsanordnung Download PDF

Info

Publication number
EP1038601A2
EP1038601A2 EP00302274A EP00302274A EP1038601A2 EP 1038601 A2 EP1038601 A2 EP 1038601A2 EP 00302274 A EP00302274 A EP 00302274A EP 00302274 A EP00302274 A EP 00302274A EP 1038601 A2 EP1038601 A2 EP 1038601A2
Authority
EP
European Patent Office
Prior art keywords
seal
seal assembly
assembly
roll
annular body
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
EP00302274A
Other languages
English (en)
French (fr)
Other versions
EP1038601A3 (de
EP1038601B1 (de
Inventor
Michael Robotham
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Kvaerner Metals Davy 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 SMS Demag AG, Kvaerner Metals Davy Ltd filed Critical SMS Demag AG
Publication of EP1038601A2 publication Critical patent/EP1038601A2/de
Publication of EP1038601A3 publication Critical patent/EP1038601A3/de
Application granted granted Critical
Publication of EP1038601B1 publication Critical patent/EP1038601B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/07—Adaptation of roll neck bearings
    • B21B31/078—Sealing devices

Definitions

  • the present invention relates to a sealing assembly for use in a rolling mill and to the seal element used in the assembly.
  • a rolling mill may be operated under wet conditions in which water is fed over the roll. A certain amount of water is inevitably dispersed into the direction of the roll neck and the lubricated areas of the bearing assembly.
  • a sealing assembly may be used on the tapered section of the roll neck in order to maintain a liquid barrier between the roll and the bearing assembly.
  • a conventional sealing assembly is described in US-A-4586720 (Simmons et al).
  • This particular sealing assembly comprises a flexible, circular seal element mounted directly on the rotatable tapered section of the roll neck and located at the interface of the roll and lubricated contact surface of the bearing assembly, in order to prevent leakage of lubricant from the bearing assembly to the roll and leakage of water from the roll to the bearing assembly.
  • the circular seal element comprises an annular main body which is provided with various flanges and lips. More particularly, two outwardly disposed radial flanges provided on the annular body impinge upon a surface of the fixed portion of the bearing assembly by means of flexible peripheral lips on the flanges.
  • the seal end plate upon which the seal element impinges is generally a ceramic-based material.
  • the present invention is based primarily on the recognition that there are certain advantages in mounting the seal element of the sealing assembly on the stationary part of the bearing assembly. For example, by positioning the seal element on the fixed bearing element rather than on the rotatable bearing element the seal element may be mounted more robustly.
  • the present invention provides a sealing assembly for use in conjunction with the rotatable tapered section of a roll neck which is part of a roll in a rolling mill, said sealing assembly having a first bearing element mounted on said rotatable tapered section and at least partially opposing a fixed second bearing element to define a contact surface therebetween which is adapted to receive lubricant, wherein said fixed second bearing element comprises a flexible seal element positioned between the contact surface and the roll and provided with liquid barrier means for substantially preventing liquid passage between the contact surface and the roll.
  • the liquid barrier means is adapted to substantially prevent undesirable lubricant leakage from the contact surface to the roll and water leakage from the roll to the contact surface.
  • the seal element comprises a substantially annular body.
  • the liquid barrier means comprises one or more (preferably two) circumferential lips inwardly disposed from the substantially annular body.
  • the or each inwardly disposed circumferential lip is angularly disposed.
  • the or each circumferential lip is attached at the central section of the substantially annular body.
  • each circumferential lip may be attached by shoulders radially raised on the inner surface of the annular body and conveniently axially spaced apart.
  • the seal element is substantially axially symmetrical.
  • a lantern ring may be incorporated in the seal element to drain out any oil which does penetrate the seal element.
  • the or each circumferential lip is provided with an enlarged peripheral end.
  • the enlarged peripheral end is multi-faceted.
  • the enlarged peripheral end may comprise five annular faces.
  • the enlarged peripheral end is provided with a reduced point arranged to contact the first bearing element in use.
  • the circumferential lips of the flexible seal element may be deformable in order to adopt a stressed state.
  • the force acting in opposition to the stressing may improve the seal between the peripheral end of the lips and the contact surface.
  • the peripheral end may be conveniently provided with a cut-away portion for encapsulating a garter spring which may further improve the seal.
  • the fixed second bearing element may comprise a rigid seal support means (eg seal end plate) upon which the seal element is mounted.
  • the rigid seal support means may comprise a recess ( eg an annular recess) in which at least the annular body of the seal element is located.
  • the rigid seal support means may be provided with a clamp for retaining the seal element in the recess.
  • One inner face of the clamp advantageously forms the outer face of the recess in which the seal element is located thereby permitting easy access to the recess for installation/removal of the seal element and visual checking of the seal element.
  • the clamp may be provided with an appropriate fastener for ease of removal.
  • the peripheral end of the or each circumferential lip is seated on the first bearing element of the sealing assembly.
  • the first bearing element may be provided with a carrier ring mounted on the tapered portion of the roll neck and providing a substantially horizontal running surface.
  • the carrier ring is coated with a metal coating, particularly preferably a chrome coating which acts as the horizontal running surface. This is advantageous over conventional ceramic-based coatings which have been found to lead to significant deterioration of the seal element and which are unable to remove the significant amounts of heat which are generated. In the latter regard, chrome possesses excellent heat dissipation properties.
  • the first bearing element preferably comprises a sleeve mounted on the rotatable roll neck.
  • the fixed second bearing element preferably comprises a fixed bushing carried in a bearing chock.
  • the sleeve is conveniently provided with an outer surface which is adapted to be rotatable within an inner surface of the fixed bushing thereby defining the contact surface at the axial side of the seal element opposite to the roll side.
  • Lubricant eg oil
  • the rigid seal support means may be mounted adjacent and attached to the chock on the non-roll side.
  • the fixed second element of the assembly comprises a downwardly depending deflector attached on the roll side to withstand liquid (eg water) passage from the roll to the seal element.
  • the deflector may be conveniently mounted on the rigid seal support means.
  • the deflector preferably comprises a coolant seal.
  • An important advantage of the sealing assembly of the invention is that the seal element is readily accessible for repair and replacement and for visual inspection.
  • the present invention comprises a substantially non-graphitic seal element.
  • the seal element is substantially polymeric and may be an elastomer.
  • the seal element comprises one or more garter springs to retain positioning and for added strength.
  • the present invention provides a seal element as hereinbefore described being a component of a sealing assembly for use in conjunction with the rotatable tapered section of a roll neck which is an integral part of a roll in a rolling mill.
  • the seal element comprises:
  • a benefit of the seal element of the invention over the seal element of for example US-A-4586720 (Simmons et al ) is its simple configuration. For example, it lacks the numerous flanges and lips which render the configuration of the prior art seal element somewhat complex. The simple configuration makes the seal element more straightforward to manufacture.
  • each inwardly disposed circumferential lip is angularly disposed.
  • each circumferential lip is attached at the central section of the substantially annular body.
  • each circumferential lip may be attached by shoulders radially raised on the inner surface of the annular body and conveniently axially spaced apart.
  • the seal element is substantially axially symmetrical.
  • a lantern ring may be incorporated in the seal element to drain out any oil which does penetrate the seal element.
  • each circumferential lip is provided with an enlarged peripheral end.
  • the enlarged peripheral end is multi-faceted.
  • the enlarged peripheral end may comprise five annular faces.
  • the enlarged peripheral end is provided with a reduced point arranged to contact the first bearing element in use.
  • the circumferential lips of the flexible seal element may be deformable in order to adopt a stressed state.
  • the force acting in opposition to the stressing may improve the seal between the peripheral end of the lips and the contact surface.
  • the peripheral end may be conveniently provided with a cut-away portion for encapsulating a garter spring which may further improve the seal.
  • the seal element is substantially non-graphitic.
  • the seal element is polymeric eg an elastomer.
  • Figure 1 illustrates a roll neck internal sealing assembly in cross-sectional view designated generally by reference numeral 2.
  • the assembly is positioned adjacent to the tapered section 3 of a roll neck 4 in a rolling mill.
  • Roll 1 is illustrated in truncated form.
  • the sealing assembly 2 mounted on the rotatable roll neck 4 comprises a first bearing element.
  • the first bearing element comprises sleeve 5 and moulded seal carrier ring 6 made of a nitrile compound.
  • the moulded seal carrier ring 6 is mounted on the tapered section 3 of roll neck 4 and is adapted to provide a horizontal running sleeve 7 for seal element 13 made of stainless steel with a thin dense chrome surface coating.
  • the outer flange of the moulded seal carrier ring 6 is provided with a garter spring 8.
  • the fixed second bearing element of the assembly 2 comprises bushing 10 carried in chock 9.
  • the bushing 10 and sleeve 5 are at least partially opposed to define contact surface 11.
  • the contact surface 11 between rotating sleeve 5 and fixed bushing 10 is oil-filled.
  • the end of the chock 9 provides a reservoir 12 in which oil may be collected for drainage purposes and recirculation.
  • the fixed second bearing element includes seal element 13 described in greater detail with reference to Figure 2 and made of an elastomer compound.
  • Figure 2 shows the seal element designated generally by reference numeral 21 and comprising two circumferential lips 22a,22b angularly disposed from the central section of the annular main body 27. Each lip terminates in a multi-faceted, enlarged peripheral end 28a,28b having five annular faces.
  • Each lip 22a,22b is attached to the annular main body 27 by means of shoulders 24a radially raised on the inner surface of the annular body and axially separated by lantern ring 23.
  • Enlarged peripheral ends 28a,28b are each provided with a reduced contact point 26a,26b which in use is seated on the chrome running surface 7 of carrier ring 6 which rotates.
  • the lip 22b on the roll side of the assembly acts as a barrier to splashes of water from the roll when it is used under wet conditions.
  • Equally lip 22a on the non-roll side of the assembly prevents leakage of oil to the roll side.
  • the lip 22a acts as a mechanical barrier which deflects lubricant from contact area 11 into reservoir 12.
  • Each peripheral end 28a,28b is provided with a garter spring 25a,25b in a cut-away portion.
  • seal element 13 is located in a suitably shaped recess 17a in rigid seal support means 17 which is made of mild steel.
  • the outer face of the recess is provided by a face of separate clamping means 14 removable by cap head screw 15.
  • This arrangement permits easy access to the recess 17a for removal/installation of seal element 13 and makes the seal element 13 visible for inspection purposes.
  • seal element 13 is fitted onto seal support means 17 in recess 17a. Moulded carrier ring 6 is then fitted and the clamp plate 14 retains seal element 13 in position.
  • Downwardly dependent coolant seal 16 is attached at the lower end of the fixed second bearing element on the rigid seal support means 17 to deflect water away from the seal element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)
  • Glass Compositions (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Materials For Medical Uses (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
EP00302274A 1999-03-23 2000-03-21 Dichtungsanordnung Expired - Lifetime EP1038601B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9906597 1999-03-23
GBGB9906597.1A GB9906597D0 (en) 1999-03-23 1999-03-23 Sealing assembly

Publications (3)

Publication Number Publication Date
EP1038601A2 true EP1038601A2 (de) 2000-09-27
EP1038601A3 EP1038601A3 (de) 2003-12-10
EP1038601B1 EP1038601B1 (de) 2008-07-09

Family

ID=10850143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00302274A Expired - Lifetime EP1038601B1 (de) 1999-03-23 2000-03-21 Dichtungsanordnung

Country Status (5)

Country Link
EP (1) EP1038601B1 (de)
AT (1) ATE400375T1 (de)
DE (1) DE60039382D1 (de)
ES (1) ES2308963T3 (de)
GB (1) GB9906597D0 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003078085A1 (de) * 2002-03-15 2003-09-25 Sms Demag Aktiengesellschaft Dichtungsvorrichtung mit eineim zweiteiligen ringkörper
WO2005065855A1 (de) * 2004-01-03 2005-07-21 Sms Demag Ag Dichtungsvorrichtung für walzenlager
WO2005071278A1 (de) * 2004-01-23 2005-08-04 Sms Demag Ag Vorrichtung zur ballenseitigen abdichtung des lagers eines walzenzapfens
CN100413609C (zh) * 2004-01-03 2008-08-27 Sms迪马格股份公司 轧辊轴承的密封装置
CN109926450A (zh) * 2018-07-20 2019-06-25 成都金中机械设备制造有限公司 一种油水分离的三辊轧机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2106196B (en) * 1981-09-16 1986-04-09 Ashlow Ltd Seals
US4910987A (en) * 1989-02-27 1990-03-27 Morgan Construction Company Roll neck face seal for cantilevered rolling mill
JPH0949572A (ja) * 1995-08-07 1997-02-18 Koyo Seiko Co Ltd 圧延機ロールネック用密封装置
JPH10109105A (ja) * 1996-10-02 1998-04-28 Kawasaki Steel Corp 圧延機のロール用軸受装置

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003078085A1 (de) * 2002-03-15 2003-09-25 Sms Demag Aktiengesellschaft Dichtungsvorrichtung mit eineim zweiteiligen ringkörper
US7611150B2 (en) 2002-03-15 2009-11-03 Sms Demag Ag Sealing device comprising a two-piece annular body
RU2309016C2 (ru) * 2002-03-15 2007-10-27 Смс Демаг Акциенгезелльшафт Уплотнительное устройство с состоящим из двух частей кольцевым телом
CN1292848C (zh) * 2002-03-15 2007-01-03 Sms迪马格股份公司 带有分体式环形体的密封装置
WO2005065855A1 (de) * 2004-01-03 2005-07-21 Sms Demag Ag Dichtungsvorrichtung für walzenlager
CN100413609C (zh) * 2004-01-03 2008-08-27 Sms迪马格股份公司 轧辊轴承的密封装置
JP2007518573A (ja) * 2004-01-23 2007-07-12 エス・エム・エス・デマーク・アクチエンゲゼルシャフト 圧延ロールネックの軸受部の、ロール胴側の封隙のための装置
DE102004003763B4 (de) * 2004-01-23 2005-10-20 Sms Demag Ag Vorrichtung zur ballenseitigen Abdichtung des Lagers eines Walzenzapfens
DE102004003763A1 (de) * 2004-01-23 2005-08-18 Sms Demag Ag Vorrichtung zur ballenseitigen Abdichtung des Lagers eines Walzenzapfens
CN100434736C (zh) * 2004-01-23 2008-11-19 Sms迪马格股份公司 用于在辊身侧密封辊颈的轴承的装置
WO2005071278A1 (de) * 2004-01-23 2005-08-04 Sms Demag Ag Vorrichtung zur ballenseitigen abdichtung des lagers eines walzenzapfens
US7836742B2 (en) 2004-01-23 2010-11-23 Sms Siemag Aktiengesellschaft Device for sealing the ball side of a bearing of a roller stud
JP4755603B2 (ja) * 2004-01-23 2011-08-24 エス・エム・エス・ジーマーク・アクチエンゲゼルシャフト 圧延ロールネックの軸受部の、ロール胴側の封隙のための装置
CN109926450A (zh) * 2018-07-20 2019-06-25 成都金中机械设备制造有限公司 一种油水分离的三辊轧机

Also Published As

Publication number Publication date
ES2308963T3 (es) 2008-12-16
ATE400375T1 (de) 2008-07-15
EP1038601A3 (de) 2003-12-10
DE60039382D1 (de) 2008-08-21
GB9906597D0 (en) 1999-05-19
EP1038601B1 (de) 2008-07-09

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