Bearings for Continuous Caster

• FV Rolling bearings and housings for converters 

• Spherical roller bearings

MB series - spherical roller bearings ( taper cone 1:30 )

Sleeve

• Requirements on the trunnion bearings in converters
  

• 1. Requirements on the trunnion bearings in converters

• When filled, large converter vessels weigh several hundred tons.

• The resulting loads must be supported by the trunnion bearing arrangement. As only slow swivel motions occur, the bearings must feature a high static load carrying capacity. Shock loads, which are an everyday occurrence in converters, must also be accommodated.

• The bearing arrangement must also be able to compensate housing misalignments and deflections of the construction. In addition, considerable length variations caused by the temperature changes during heating and cooling of the converter must be compensated for, as well as dimensional changes to the supporting ring.

• The spherical roller bearing has established itself as the rolling bearing type for converters. In addition to its high radial and axial load carrying capacity and its insensitivity to shocks, it also provides significant angular adjustability.

• In the conventional design, the locating bearing on the drive side supports the axial guidance forces of the converter. A plain bush, in which the bearing outer ring can shift axially, is inserted in the housing on the non-locating bearing side, Figure 1.

• Spherical roller bearings featuring the main dimensions of series 249 meet the demands on converter bearings. These bearings have proved to be particularly suitable in terms of axial displaceability.

• Whereas unsplit bearings are used on the non-locating bearing side, the preferred choice for replacement bearings on the locating bearing side are split spherical roller bearings whose dimensions are matched to series 249.

• The split bearings facilitate bearing replacement without dismounting the drive, see section 2.2.
  

• 2. Rolling bearings and housings for converters

• The technical data relating to FV spherical roller bearings and FV plummer block housings for converters can be found in section 6.

• 2.1 Spherical roller bearings

• The FV spherical roller bearing is a rolling bearing designed for very demanding conditions. It contains two rows of symmetrical barrel rollers which orient themselves freely in the concave outer ring raceway. As a result, shaft flexing and misalignment of the bearing seats are compensated. 
  

• Bearing components are bonderised and/or have a molybdenum disulphide coating, depending on the design.

• The bearings are produced with a cylindrical or tapered bore (taper 1:30).

• Spherical roller bearings with a cylindrical bore are located directly on the converter trunnion, Figure 1 on page 2. Bearings with a tapered bore are mounted on tapered sleeves, Figure 2.

• 
  FV spherical roller bearings list for converters  
  

• Bearings of dimension series 49 with solid brass cage (MB)

•  - with cylindrical bore 

•  - with tapered bore and sleeve 

Bearing and sleeve list and Dimension table 

• 
  FV spherical roller bearings for converters  

• Bearings of dimension series 49 with pin cage 

•  - with cylindrical bore 

•  - with tapered bore and sleeve 

Bearing and sleeve list and Dimension table