WO2011098318A1

WO2011098318A1 - Tiltable converter having a pendulum bar suspension

Info

Publication number: WO2011098318A1
Application number: PCT/EP2011/050431
Authority: WO
Inventors: Gerald Wimmer; Johannes Rosner; Peter Wimmer; Rudolf Gruber
Original assignee: Siemens Vai Metals Technologies Gmbh
Priority date: 2010-02-12
Filing date: 2011-01-14
Publication date: 2011-08-18
Also published as: CN102741431A; EP2534270B1; EP2534270A1; CN102741431B; AT508665B1; KR20120116507A; AT508665A4

Abstract

The invention relates to a tiltable converter having a suspension system comprising pendulum bars (3) which are each connected by one end on the converter vessel (1) and by the other end on the bearing ring (2) by means of spherical pendulum bar bearings, articulated on all sides. According to the invention, the spherical pendulum bar bearings have bolts (7) passing through the pendulum bars (3) on which the pendulum bars (3) are spatially mounted in a pivoting manner, wherein each bolt (7) is supported on both sides of the pendulum bar (3) via support brackets (4) on the converter vessel (1) or on the bearer ring (2) and the bolts (7) are mounted in the support brackets (4) by means of spherical support bracket bearings. The openings of the support brackets (4), through which the bolts (7) pass through and in which the spherical support bracket bearings are arranged, are covered by covers (8) on the sides thereof facing away from the pendulum bar (3). The converter according to the invention is characterized in that, for at least one of the pendulum bars (3) and the parts of the suspension system allocated thereto, the bolt (7) is passed through in the longitudinal direction by a tensioning screw (9) and the tensioning screw (9) passes through the covers (8) of the pair of support brackets (4) supporting the bolt (7), and there is a form-fitting connection between the covers (8) of the pair of support brackets (4) which runs over the spherical pendulum bar bearing and the spherical support bracket bearing.

Description

description

Description of the Invention Tilting converter with pendulum rod suspension

Field of engineering

The invention relates to a tiltable converter with a pendulum rods comprehensive suspension system.

State of the art

Converters of this type are known, for example, from DE4327640 and from US6228320. The pendulum rods are connected in each case with one end to the converter vessel and with the other end on the support ring on all sides articulated by means of spherical pendulum rod depositors. The spherical Pendelstablager have as bearing pins on the pendulum rods passing through bolts, the bolts on both sides via support tabs on

Converter vessel or supported on the support ring. In the support tabs, the bolts are supported by means of spherical support tab bearings. The bolts

penetrated openings in the support tabs, in which the spherical

Support tab bearings are arranged, are covered on their side facing away from the pendulum rod of covers that prevent contamination and the

To hold supporting tab bearings in position. In the operation of such converters, the problem may arise that the covers are deformed and torn from their fixtures. Likewise, damage to the support tab bearings may occur. The cause of such damage was previously unknown. Due to the lack of coverage associated with such damage and limited position retention of the covers, the likelihood of occurrence of support tab bearing damage increases. The repair of the damage is labor-intensive and reduces the availability of the converter for steelmaking. Summary of the Invention Technical Problem

It is the object of the present invention to provide a converter with a pendulum rod comprehensive suspension system in which the risk of the occurrence of the damage to the covers described above, and at the support tab bearings, reduced or avoided.

Technical solution

This task is solved by a

tiltable converter, comprising

a converter vessel,

- a support ring,

- A suspension system, wherein the converter vessel with the support ring over

the suspension system is connected,

and where the suspension system

a plurality of pendulum rods, which are connected in each case with one end to the converter vessel and with the other end on the support ring on all sides articulated by means of spherical pendulum rod depositors,

and optionally at least one stabilizing device for limiting a movement of the converter vessel relative to the support ring

includes,

and wherein the spherical Pendelstablager the pendulum rods passing through bolts on soft the pendulum rods are spatially pivotally mounted, each bolt on both sides of the pendulum rod via support tabs on the converter vessel

or is supported on the support ring, and the bolts are mounted in the support tabs by means of spherical support tab bearings,

and the openings of the support tabs through which the bolts are arranged, in which the spherical support tab bearings are arranged, are covered by covers on their side facing away from the pendulum rod, The converter according to the invention is characterized

that for at least one of the pendulum rods and its associated parts of the

Suspension system applies,

that the bolt is penetrated longitudinally by a clamping screw, and the clamping screw passes through the covers of the bolt supporting pair of support tabs,

and that there is a positive connection between the covers of the pair of support tabs passing over the spherical pendulum rod support and the spherical support tab bearing.

Advantageous Effects of the Invention

It has been recognized by the inventors of the present invention that the deformation of the covers and the tearing of the covers from their fixtures are, to a significant extent, due to the pendulum rod bearings and the support tab bearings being subjected to forces in the direction of the longitudinal axis of the bolt associated with slackened ones Pressing the components of the pendulum support and the support plate bearings lead to the known damage. The fortifications of

Covers are not sufficiently designed for conventional loads according to DE4327640 and US6228320 for the actual loads occurring.

The pendulum support and support tab bearings are due to

operational deformations of the converter support ring and the converter vessel, due to the harsh operation in a steel mill, and due to contamination to the occurrence of large frictional forces. These frictional forces lead to the occurrence of forces in the direction of the longitudinal axis of the bolt. In addition, it comes due to the large loads and deformations in the pendulum support and the support tab bearings.

These factors lead to a relaxation of the pendulum supports and

Support tab bearings existing press fits the components of the pendulum rod storage and support plate bearings, so that components of pendulum rod and support tab bearings can move each other. These relative movements lead to the stress on the covers, which is expressed in deformation and tearing of the covers from their attachments. Since the forces in the direction of the longitudinal axis of the bolt in known converters with pendulum rods comprehensive suspension systems on the support plate bearings in the covers, both covers and support plate bearings are over burdened and threatened by damage. By the solution according to the invention forces are introduced in the direction of the longitudinal axis of the bolt under reduced load of the support plate bearings in the covers. The clamping screw fixes the covers and the between the

Covers lying components of the pendulum rod storage and support plate bearings or the suspension system in the direction of the longitudinal axis of the bolt. Due to the bias of the clamping screw, the position of the components is defined and relative movements are prevented. Accordingly, by such

Relative movements caused dynamic stresses and damages prevented.

The clamping screw is designed for a multiple of the maximum loads of the covers. Forces in the direction of the longitudinal axis of the bolt are distributed by the central clamping screw on both covers. By recognizing the underlying facts of the damage, it is possible to remedy by targeted measures. Without knowledge of these issues, only a reinforcement of all components of the pendulum support and support plate bearings, covers and their fasteners, and bolts comes into question to solve the problem. In recognizing the underlying facts themselves, there is already one

innovative step.

The converter is used, for example, for steel production.

There is one bolt per pendulum rod holder. The bolt forms the bearing pin of the pendulum rod bearing or the support plate bearing.

According to one embodiment of the tiltable converter according to the invention, the positive connection between the covers of the pair of support tabs via bearing bushes and / or bearing inner rings of the spherical pendulum and the spherical support tab bearings, as well as arranged between the spherical pendulum bearing and the spherical support tab bearings Pendelstablagerzwischenelemente extending both with respect to the Pendelstablager as well as with respect to the support tab bearings are positively, and arranged between the spherical support tab bearings and the covers supporting tab bearing intermediate elements which are positively against both the support tab bearing and against the cover. An embodiment of a tiltable converter according to the invention in which the support plate bearings each have a bearing inner ring formed by a ball portion is characterized in that the Stützlaschenlagerzwischenlement is a ball ring with a cover facing the ball surface which is positively applied to a spherical surface portion of the cover,

the radii

- The spherical surface of the bearing inner ring of the form-fitting connected by the ball ring with the cover spherical support tab bearing,

- The spherical surface of the ball ring and

- The spherical surface portion of the cover

all start from the same point.

The different spherical surfaces thus come from different spheres, whereby the spatial position of the centers of these spheres is the same for all spheres.

By such a design is guaranteed that even when tilted the bolt, which may be present for example due to manufacturing tolerances of the suspension system, forces in the direction of the covers evenly distributed in the support tab bearings and forwarded to the covers. avoidance of

Uneven loads or load peaks lead to an increase in the service life of the support plate bearings and increased safety during operation of the converter.

According to a preferred embodiment of the converter according to the invention, the spherical pendulum rod bearing on a bearing outer ring, and the bearing outer ring of the spherical Pendelstablagers is fixed by means of a holding device on the pendulum rod, wherein

at least one pendulum rod on the pendulum rod itself and / or on at least one of its associated holding devices

at least two stop devices for limiting the rotational latitude of the associated pendulum rod are mounted about its longitudinal axis.

By preventing excessive misalignment, direct contact between the pendulum rod - or attached to this sensitive components - and the support tabs can be avoided, which leads to a more uniform stress on the pendulum rod bearing and reduces wear between pendulum rod and support tabs. Among the on The pendulum rod attached sensitive components are of course not the

To understand stop devices themselves, but for example screws.

For example, it can be prevented that the holding device on the pendulum rod fastening screws come into contact with the support tabs.

The stop devices for limiting the rotational latitude can

For example, be stop blocks, which are preferably made of metal.

Preferably, the stop devices are mounted so as to cover the region of the holding device and / or the pendulum rod which lies in a plane perpendicular to the longitudinal axis of the pendulum rod and containing the longitudinal axis of the bolt.

According to a preferred embodiment of the tiltable converter according to the invention the bearing outer ring of the spherical Pendelstablagers is fixed by means of a holding device on the pendulum rod, wherein the holding device relative to the

Pendelstablagerzwischenelementen is sealed by means of a lamellar sealing ring, wherein the lamellar sealing ring rests on one of the holding device opposite curved spherical surface of Pendelstablagerzwischenelemente.

In this way, to be sealed by the lamellar sealing ring distance between holding device and Pendelstablagerzwischenelementen also at

Misalignments of the pendulum rod constant, which guarantees a consistent sealing effect.

Brief description of the drawings

In the following, the invention will be explained in more detail with reference to exemplary schematic figures.

Figure 1 shows an overall view of a tiltable converter with a suspension system comprising pendulum rods.

FIG. 2 shows an enlargement of the area bordered by a dashed line in FIG. 1 in section.

FIG. 3 shows an enlarged detail from the representation of FIG. 2.

Figure 4a shows a side view of a pendulum rod located between a pair of support tabs.

Figure 4b shows a rotated by 90 ° view of the arrangement shown in Figure 4a. Description of the embodiments

In Figure 1, a converter vessel 1 is connected to a support ring 2 via a suspension system. The suspension system comprises several pendulum rods 3. The pendulum rods 3 are connected at one end to the converter vessel 1 and at one end to the support ring 2 via support tabs 4. The pendulum rods are connected to the converter vessel 1 and the support ring 2 on all sides articulated by means of spherical Pendelstablager, which are not shown for clarity.

One of a pair of attached to the support ring 2 Führungspratzen 5a, 5b and attached to the converter vessel 1 stabilizer 6 existing stabilization device limits the extent to which the converter vessel 1 and support ring 2 can move relative to each other. FIG. 2 shows an enlargement of the area framed in broken lines in FIG. 1, showing the spherical pendulum rod bearing and the spherical one

Support tab stock. Bolt 7 passes through the pendulum rod 3. The pendulum rod 3 is mounted on the bolt 7 spatially pivotable. The bolt 7 is supported on both sides of the pendulum rod 3 via support tabs 4 on the converter vessel 1. The bolt 7 passes through openings in the support tabs 4 and is mounted spherically in the support tabs 4. The openings in the support tabs 4 are covered on the side facing away from the pendulum rod 3 side of covers 8. The bolt 7 is penetrated in the longitudinal direction by a clamping screw 9, which also covers 8 of the bolt 7 supporting pair of

Support tabs 4 interspersed. Between the covers 8 of the pair of support tabs 4 is a positive connection, which extends over the spherical pendulum rod bearing and the spherical support tab bearing.

Figure 3 shows an enlarged detail of the illustration of Figure 2. The positive connection between the covers 8 of the pair of support tabs 4 of Figure 2 - of which for clarity in Figure 3 only one is shown - runs through bearing bush 10, and bearing inner ring 1 1st a the spherical pendulum rod bearing or bearing inner rings 1 1 b the spherical support plate bearings, as well as arranged between the spherical pendulum rod bearing and the spherical support tab bearings Pendelstablagerzwischenelemente 12, both with respect to the

Bearing bush 10 and the bearing inner ring 1 1 a of the spherical pendulum rod storage as well relative to the bearing inner ring 1 1 b of the spherical support tab bearing are positively, and arranged between the spherical support tab bearings and the covers 8 Stützlaschenlagerzwischenelemente 13, both with respect to the

Bearing inner ring 1 1 b of the spherical support tab bearing and against the

Cover 8 are positive.

The bearing outer ring 14 of the spherical Pendelstablagers is by means of a

Holding device 15 is attached to the pendulum rod 3. The holding device 15 is sealed relative to the pendulum rod intermediate storage elements 12 by means of a laminar sealing ring 16, wherein the laminar sealing ring 16 rests on one of the holding device 15 convex spherical surface of the pendulum rod intermediate storage elements 12.

The Stützlaschenlagerzwischenlement 13 is a ball ring with a cover 8 facing the ball surface which is positively applied to a spherical surface portion of the cover 8, wherein the radii of

- spherical surface of the bearing inner ring 1 1 b of the ball ring with the cover 8 positively connected spherical support tab bearing,

- The spherical surface of the ball ring and

- The spherical surface portion of the cover. 8

all start from the same point. To clarify this situation, the circle of the section through the spherical surface portion of the cover 8 is shown by dashed lines in Figure 2.

FIG. 4a shows a side view of a pendulum rod 3 located between a pair of support tabs 4. Two stop blocks 17 are mounted on the holding device 15 as stop devices for limiting the rotational freedom of the pendulum rod 3 about its longitudinal axis. The stop blocks 17 are mounted on the holding device 15. They are positioned there so that they limit a rotation about the longitudinal axis of the pendulum rod.

Figure 4b shows a rotated by 90 ° view of the arrangement shown in Figure 4a. A plane containing the longitudinal axis of the pendulum rod 18 is shown in phantom running vertically.

Here it can clearly be seen that the stop block 17 covers the region of the holding device 15, which is located in a dash-dot horizontally extending plane 19, which is perpendicular to the plane containing the longitudinal axis of the pendulum rod 18 and contains the longitudinal axis of the bolt. In this way, a rotation of the

Pendulum rod 3 limited to its longitudinal axis. The limitation is made by stop Since the abutment block is slightly higher than the screws 20 securing the retainer to the pendulum rod, these screws 20 are protected from damage by the abutment block in the event of rotation of the pendulum rod 3 about its longitudinal axis.

LIST OF REFERENCE NUMBERS

Converter vessel 1

Support ring 2

Pendulum rod 3

Support tab 4

Guide claws 5a, 5b

Stabilizer 6

Bolt 7

Cover 8

Clamping screw 9

Bushing 10

Bearing inner ring 1 1 a, 1 1 b

Pendelstablagerzwischenelement 12

Support tab bearing intermediate element 13

Bearing outer ring 14

Holding device 15

Lamella sealing ring 16

Stop block 17

The longitudinal axis of the pendulum rod 18 containing plane

Plane (perpendicular to plane 18) 19

Screw 20

List of quotations

Patent Literature DE4327640

US6228320

Claims

claims

1) Tiltable converter comprising

a converter vessel (1),

a support ring (2),

a suspension system, wherein the converter vessel (1) is connected to the support ring (2) via the suspension system,

and where the suspension system

several pendulum rods (3), which in each case with the one end on the converter vessel (1) and with the other end on the support ring (2) on all sides articulated by means of spherical

Pendulum depositors are connected,

and optionally at least one stabilizing device for limiting a

Movement of the converter vessel (1) relative to the support ring (2)

includes,

and wherein the spherical Pendelstablager the pendulum rods (3) passing through bolts (7) on soft the pendulum rods are spatially pivotally mounted, each bolt (7) on both sides of the pendulum rod (3) via support tabs (4) on the converter vessel (1) or on Support ring (2) is supported, and the bolt (7) in the

Supporting tabs (4) are mounted by means of spherical support tab bearings,

and passing through the bolt (7) openings of the support tabs (4) in which the spherical support tab bearings are arranged, at their the pendulum rod (3)

opposite side of covers (8) are covered,

characterized,

that applies to at least one of the pendulum rods (3) and its associated parts of the suspension system,

that the bolt (7) in the longitudinal direction of a clamping screw (9) is penetrated, and the clamping screw (9) passes through the covers of the bolt (7) supporting pair of support tabs (4),

and that between the covers (8) of the pair of support tabs (4) there is a positive connection extending over the spherical pendulum rod support and the spherical support tab bearing.

2) Tiltable converter according to claim 1, characterized in that the

positive connection between the covers of the pair of support tabs (4) via bearing bushes (10) and / or bearing inner rings (1 1 a, 1 1 b) of the spherical Pendulum and the spherical support tab bearings, as well as arranged between the spherical pendulum rod storage and the spherical support tab bearings Pendelstablagerzwischenelemente (12) which are positively against both the pendulum rod and against the support tab bearings, and arranged between the spherical support tab bearings and the covers

Support tab bearing intermediate elements (13), which are positively against both the support tab bearing and with respect to the cover (8) extends.

3) A tiltable converter according to claim 1 or 2, wherein the support lug bearings each have a bearing inner ring (1 1 b) formed by a ball portion,

characterized,

in that the support tab bearing intermediate element (13) is a ball ring with a spherical surface facing the cover (8), which is in a form-fitting manner against a spherical surface section of the cover (8),

the radii

- The spherical surface of the bearing inner ring (1 1 b) of the of the ball ring with the cover (8) positively connected spherical support tab bearing,

- The spherical surface of the ball ring and

- The spherical surface portion of the cover (8)

all start from the same point.

4) A tiltable converter according to one of claims 1 to 3, wherein the spherical pendulum rod bearing having a bearing outer ring (14), and the bearing outer ring (14) of the spherical Pendelstablagers by means of a holding device (15) on the pendulum rod (3) is fixed, characterized in that at least one pendulum rod (3) on the pendulum rod (3) itself and / or on at least one of its associated

Holding devices (15) at least two stop devices for limiting the rotational latitude of the associated pendulum rod are mounted about its longitudinal axis.

5) A tiltable converter according to one of claims 1 to 4, wherein the spherical pendulum rod bearing having a bearing outer ring (14), and the bearing outer ring (14) of the spherical Pendelstablagers by means of a holding device (15) on the pendulum rod (3) is fixed, characterized in that the holding device (15) relative to the pendulum rod intermediate storage elements (12) by means of a lamellar sealing ring (16) is sealed, wherein the lamellar sealing ring (16) on one of the holding device (15) bulging spherical surface of Pendelstablagerzwischenelemente (12).