EP0765404B1 - Vorrichtung zum tragen eines drehenden körpers - Google Patents

Vorrichtung zum tragen eines drehenden körpers Download PDF

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Publication number
EP0765404B1
EP0765404B1 EP95919411A EP95919411A EP0765404B1 EP 0765404 B1 EP0765404 B1 EP 0765404B1 EP 95919411 A EP95919411 A EP 95919411A EP 95919411 A EP95919411 A EP 95919411A EP 0765404 B1 EP0765404 B1 EP 0765404B1
Authority
EP
European Patent Office
Prior art keywords
rollers
running surface
running
holes
strip
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.)
Expired - Lifetime
Application number
EP95919411A
Other languages
English (en)
French (fr)
Other versions
EP0765404A1 (de
Inventor
Emile Lonardi
Giovanni Cimenti
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Priority claimed from US08/764,534 external-priority patent/US5749820A/en
Publication of EP0765404A1 publication Critical patent/EP0765404A1/de
Application granted granted Critical
Publication of EP0765404B1 publication Critical patent/EP0765404B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0001—Positioning the charge
    • F27D2003/0006—Particulate materials
    • F27D2003/0007—Circular distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0042—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising roller trains
    • F27D2003/0045—Use of rollable bodies, e.g. balls

Definitions

  • the invention relates to a suspension device for a heavy body made of rotation about a substantially vertical axis, such as for example a rotary hopper. It relates more particularly to a device of this kind which comprises, on one side, a metal tread defining a annular rolling surface and, on the other side, at least n rollers, or n is an integer larger than 3, these n rollers being arranged to take support on said rolling surface to support said rotating body.
  • a device of this kind is for example known from document US-A-4,812,100, in which it is described in relation to a rotary hopper of a cell oven.
  • a rotary hopper weighs, when loaded, several hundreds of tonnes. If we were to work with three support rollers spaced 120 °, each roller should be sized to take at least a third the weight of the hopper.
  • pebbles we naturally have an interest in working with pebbles as small as possible. Hence the idea of working with more than three pebbles. But this idea poses problems with regard to its practical implementation.
  • the problem underlying the present invention is to provide a device of the kind described in the preamble which is much simpler than the device described in document US-A-4,812,100 and which is nevertheless able to substantially correct an uneven distribution of the weight of said heavy body on more than three rollers.
  • this problem is solved by means elastically compressible which are arranged below the strip of bearing so that the running surface has deformations elastic around the points of contact between the rollers and the surface of rolling.
  • These elastically compressible means are on the other hand dimensioned so that said elastic deformations of the surface of enough to substantially correct an uneven distribution the weight of said heavy body on the rollers resulting from slight defects in co-flatness shingles.
  • the present invention has the advantage that the suspension of the n rollers can be much simpler than that described in document US-A-4,812,100 while ensuring sufficient results from the point of view of distribution of loads between the n rollers.
  • Said elastically compressible means could of course be a ring made of elastomer material that is arranged below the band rolling surface which defines the rolling surface. It will however appreciated that the present invention provides elastic means compressible which are entirely metallic. According to an execution preferential of the invention these elastically compressible means indeed comprise a metal strip provided with parallel oblong holes on the running surface. It will be appreciated that this is a solution particularly simple to make, which costs almost nothing, which does not require maintenance-free and has excellent characteristics from the point of view elastic deformations.
  • the device according to the invention advantageously comprises a cylinder of support which is coaxial with the axis of rotation and has a high rigidity, a annular fixing flange supported by a first end of said cylinder support and a tread fixed on said support flange.
  • the support cylinder then present near the hole fixing flange oblong parallel to the running surface.
  • said support cylinder forms for example the cylindrical wall of the hopper.
  • the raceway can be either integral with the rotating body, or be integral with the structure of support.
  • FIG. 1 shows the upper part of a blast furnace 10 equipped with a loading device 12 with central supply.
  • This device load 12 includes in particular a waiting hopper marked globally by reference 14. It is a rotary hopper which can rotate around the central axis 16 of the blast furnace 10, in order to avoid an asymmetrical supply a lock hopper 15 located below the holding hopper 14.
  • the holding hopper 14 is installed on a platform 18 which is at its tower supported by a superstructure 20. The latter rests on the wall 20 of the blast furnace 10.
  • the suspension of the hopper 14 on the platform 18 is produced using four rollers 24 mounted on the platform 18. These rollers 24 bear on an annular tread 26 which surrounds the hopper 14 and is integral with the latter.
  • the hopper 14 includes a part upper, which includes a cylindrical wall 28, and a lower part, which comprises a frustoconical wall 30.
  • the tread 26 is fixed to the lower edge of the cylindrical wall 28. This edge projects slightly towards the low relative to the joint between the cylindrical wall 28 and the frustoconical wall 30.
  • Such a hopper 14 of a loading installation 12 of a blast furnace 10 weighs, when loaded, several hundred tonnes. This weight must be taken up by the support rollers 24 to be transmitted through the platform 18 and the superstructure 20 on the wall 22 of the blast furnace 10.
  • the ratio (e / D) is generally very small (in other words, the eccentricity of the center of gravity G of the hopper 14 is low), which results that each of the four rollers should be sized to take up 50% of the weight of the hopper. It is also important to note that the tread 26, which is fixed to the lower front surface of the cylinder 28 with a vertical axis, can be compared to the sole of an almost infinitely rigid beam. In in other words, the tread 26 has almost no deformations.
  • the reactions R 1 and R 3 each represented approximately 50% of the total weight of the hopper 14. Due at these local deformations of the rollers 24 1 and 24 3, the wall 28 has slightly collapsed. The roller 24 2 is now in contact with the running surface 34. At the same time there has been a notable redistribution of the weight of the hopper between the four rollers. In other words, the element 32 gives the metal tread 26 an elastic capacity sufficient to correct the effect of the defects of co-flatness of the four rollers 24 i by local deformations and thus obtain a better distribution of the weight. of the hopper 14 on the four rollers 24 i .
  • Figure 6 shows an element of the compressible band 32 interposed between the tread 26 and the cylindrical wall 28 almost infinitely rigid.
  • the compressibility of the band 32 is obtained in a clever way, by simply fitting the cylindrical wall 28, to proximity of the tread 26, of oblong holes 40 which are parallel to the rolling surface 34.
  • These holes 40 are distributed in the wall 28 with symmetry of revolution, preferably in two superimposed rows.
  • the oblong holes 40 of the upper row are offset by relative to the holes in the bottom row so that they cover the material between two successive holes in the bottom row.
  • the effect of this arrangement particular of the oblong holes 40 will be studied using diagrams A and B of Figure 4.
  • the element 32 is modeled by two ideal beams 34 'and 42' which are superimposed.
  • Beam 34 'models from a deformation point of view, the running surface 34.
  • the beam 42 'models from the deformation point of view, a fiber 42' located between the two rows of oblong holes 40.
  • the beam 34 'rests on the beam 42 'using elastic supports 44. represent the spaces (that is to say the material of the wall) between the holes 40 of the lower row. These spaces are overhung by the holes 40 in the upper row and are therefore elastically deformable towards these oblong holes.
  • the beam 42 ' is supported on rigid supports 46. These represent the material of the wall 28 overhanging the holes 40 of the lower row.
  • Figure 5 shows in a section an enlargement of the location of the hopper 14 which is surrounded by a circle in Figure 1.
  • an annular fixing flange 50 is fixed by welding to the element deformable 32.
  • the tread 26 is screwed onto this fixing flange 50. It is moreover advantageously divided into five annular sectors of 72 ° each.
  • This segmentation of the tread 26 in n + 1 segments therefore has a favorable influence on "penetration" reactions of the rollers in the running surface 34.
  • An interlocking circumferential 52 also ensures easy and adequate positioning of the different segments of the tread on the flange 50. These segments can indeed be considered as wearing parts which must be replaced regularly.
  • the tread 26 defines a surface of tapered bearing 34. The top of the cone which generates this surface is located below the running surface on the axis of rotation 16. It will still be noted that the tread 26 advantageously has a hollow section.
  • the rolling surface of the rollers 24 is curved so as to ensure contact quasi-point of the rollers 24 with the conical rolling surface 34 along of a contact circumference. To ensure optimal recovery of efforts by the deformable element 32, this contact circumference merges with the projection of the center line of the cross section of the cylinder 28 on the running surface.
  • the suspension device according to the invention has been described above with reference to referring to a rotary hopper. It could however be applied to other heavy bodies rotating around an axis (e.g. a tank, a rotating loading chute, a rotating platform etc.) when it comes use more than three support rollers to reduce the load per roller.
  • an axis e.g. a tank, a rotating loading chute, a rotating platform etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Road Paving Machines (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Blast Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)

Claims (13)

  1. Aufhängevorrichtung für einen um eine im wesentlichen vertikale Drehachse (16) rotierenden, schweren Körper, insbesondere einen Rotationstrichter (14), aufweisend auf der einen Seite ein metallisches Laufband (26), das eine ringförmige Lauffläche (34) definiert, und auf der anderen Seite mindestens n metallische Rollen (24), wo n eine ganze Zahl größer als drei ist, wobei diese n Rollen (24) so angeordnet sind, daß sie auf der Lauffläche (34) aufliegen, um den um die im wesentlichen vertikale Drehachse (16) rotierenden Körper (14) zu tragen,
    dadurch gekennzeichnet, daß
    elastisch komprimierbare Mittel (32) unter dem metallischen Laufband (26) so angeordnet sind, daß die Lauffläche elastische Verformungen um die Kontaktpunkte (Pi) zwischen den Rollen (24) und der Lauffläche (34) herum aufweist, wobei die elastisch komprimierbaren Mittel (32) so dimensioniert sind, daß die elastischen Verformungen ausreichen, um eine ungleiche Verteilung des Gewichts des schweren Körpers (14) auf die Rollen (24) infolge leichter Fehler bei der koplanaren Anordnung der n Rollen (24) im wesentlichen zu korrigieren.
  2. Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, daß die elastisch komprimierbaren Mittel ein metallisches Band (32) aufweisen, das mit zu der Lauffläche (34) parallelen Langlöchern (40) versehen ist.
  3. Vorrichtung gemäß Anspruch 1, gekennzeichnet durch
    einen Tragzylinder (28), der koaxial zu der Drehachse ist und eine hohe Steifigkeit aufweist,
    einen ringförmigen Befestigungsflansch (50), der von einem ersten Ende des Tragzylinders (28) getragen wird,
    ein Laufband (26), das auf dem Tragflansch (50) befestigt ist,
    wobei der Tragzylinder (28) in der Nähe des Befestigungsflanschs (50) zu der Lauffläche (34) parallele Langlöcher (40) aufweist.
  4. Vorrichtung gemäß Anspruch 2 oder 3, gekennzeichnet durch mindestens zwei Reihen von zu der Lauffläche (34) parallelen Langlöchern (40), wobei die Löcher der ersten Reihe bezüglich der Löcher der zweiten Reihe versetzt sind.
  5. Vorrichtung gemäß Anspruch 4, dadurch gekennzeichnet, daß die Löcher der zweiten Reihe über den Zwischenräumen zwischen den Löchern der ersten Reihe angeordnet sind.
  6. Vorrichtung gemäß irgendeinem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die Länge der Langlöcher (40) kleiner als 10° ist.
  7. Vorrichtung gemäß irgendeinem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß die Enden der Langlöcher (40) verrundet sind.
  8. Vorrichtung gemäß irgendeinem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß die Anordnung der Langlöcher (40) eine Rotationssymmetrie um die Drehachse (16) herum aufweist.
  9. Vorrichtung gemäß irgendeinem der Ansprüche 3 bis 8, dadurch gekennzeichnet, daß das Laufband (26) einen hohlen Querschnitt hat.
  10. Vorrichtung gemäß irgendeinem der Ansprüche 3 bis 9, dadurch gekennzeichnet, daß das Laufband (26) in n+1 ringförmige Segmente unterteilt ist.
  11. Vorrichtung gemäß irgendeinem der Ansprüche 3 bis 10, dadurch gekennzeichnet, daß der Kontaktumfang zwischen dem Laufband (26) und den Rollen (24) mit der Projektion des transversalen Schnitts des Tragzylinders übereinstimmt.
  12. Vorrichtung gemäß irgendeinem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Lauffläche (34) eine konische Fläche ist, wobei die Spitze des Konus, der diese Fläche erzeugt, auf der Drehachse gelegen ist, und daß die Laufrollen (24) eine konvex gewölbte Lauffläche (34) haben.
  13. Vorrichtung gemäß irgendeinem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die Lauffläche (34) mit dem rotierenden Körper (14) fest verbunden ist, und daß die Rollen (24) auf einer Tragplattform (18) starr befestigt sind.
EP95919411A 1994-06-14 1995-05-05 Vorrichtung zum tragen eines drehenden körpers Expired - Lifetime EP0765404B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
LU88495 1994-06-14
LU88495A LU88495A1 (fr) 1994-06-14 1994-06-14 Dispositif de suspension pour un corps en rotation
PCT/EP1995/001717 WO1995034689A1 (fr) 1994-06-14 1995-05-05 Dispositif de suspension pour un corps en rotation
US08/764,534 US5749820A (en) 1994-06-14 1996-12-12 Suspension device for a rotating body

Publications (2)

Publication Number Publication Date
EP0765404A1 EP0765404A1 (de) 1997-04-02
EP0765404B1 true EP0765404B1 (de) 1998-03-25

Family

ID=26640356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95919411A Expired - Lifetime EP0765404B1 (de) 1994-06-14 1995-05-05 Vorrichtung zum tragen eines drehenden körpers

Country Status (9)

Country Link
EP (1) EP0765404B1 (de)
JP (1) JPH10501304A (de)
CN (1) CN1042648C (de)
AU (1) AU2525995A (de)
BR (1) BR9507419A (de)
CZ (1) CZ284396B6 (de)
DE (1) DE69501894T2 (de)
LU (1) LU88495A1 (de)
WO (1) WO1995034689A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3928048B1 (de) * 2019-02-21 2023-06-07 Qualical International Srl Förder- und verteilungssystem für kalkstoff in vertikalen öfen
CN114812193B (zh) * 2022-06-30 2022-09-09 唐山精研实业有限责任公司 局部流化的水犁式密封排料器
CN119394034B (zh) * 2024-11-26 2025-10-31 中冶北方（大连）工程技术有限公司 一种环冷机支撑辊定位方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2613826A (en) * 1949-10-19 1952-10-14 Little Inc A Rotary seal for furnace tops
FR1091259A (fr) * 1954-01-09 1955-04-08 Dingler Ets Appareil rotatif de fermeture de fours et notamment de hauts fourneaux
DE965814C (de) * 1954-07-20 1957-06-19 Demag Ag Drehwerk fuer Beschickungstrichter von Hochoefen u. dgl. Schachtoefen
DE1013681B (de) * 1954-12-03 1957-08-14 Dingler Werke Ag Abdichtungsvorrichtung an drehbaren Gichtverschluessen von Schachtoefen, insbesondere Hochoefen
LU86824A1 (fr) * 1987-03-24 1988-11-17 Wurth Paul Sa Piste de roulement pour une tremie rotative

Also Published As

Publication number Publication date
CZ284396B6 (cs) 1998-11-11
WO1995034689A1 (fr) 1995-12-21
DE69501894T2 (de) 1998-07-23
JPH10501304A (ja) 1998-02-03
LU88495A1 (fr) 1996-02-01
BR9507419A (pt) 1997-09-09
AU2525995A (en) 1996-01-05
EP0765404A1 (de) 1997-04-02
CN1149320A (zh) 1997-05-07
DE69501894D1 (de) 1998-04-30
CZ365696A3 (en) 1997-04-16
CN1042648C (zh) 1999-03-24

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