Wind energy

2020-11-20 17:31:56 11

rolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearings

Main shaft

Bearing arrangements must withstand axial and radial loads and operate under harsh conditions.


Gearbox

Loads, stresses, vibrations and temperatures are constantly changing. Bearings must be able to cope with variable conditions.


Generator

The main threat to bearings in a variable-speed wind turbine generator is stray current.


Pitch and yaw

The complexity of motions involved, and the high loads experienced, call for bearings that can perform under punishing environmental conditions.

rolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearings


 Types of large diameter bearings

FV is one of the china's leading producers of large diameter bearings. Our portfolio comprises many different types, manufactured in a wide range of dimensions and designs.

All of our slewing bearings can be manufactured with internal gears, external gears or without gearing. Special gearing, such as helical and worm gears, are also available upon request. The seal concept is also configured for each individual case of use, and takes account of particular environmental conditions, such as particularly saline or dusty air. The bearings can also be coated for extra corrosion protection.

slewing bearing types

Ball bearing slewing rings

Ball bearings are particularly suitable for applications exerting low to medium loads on the bearings. Usually, polymer spacers are installed between the rolling elements, although bearing designs with steel or brass cages are also available.

Standard series

In addition to customised projects, our portfolio contains a comprehensive standard programme of one-piece FV ball bearing slewing rings.

Technical information

External diameter800 - 7,500 mm
Rolling element diameter20 - 90 mm
Gearingwith external gears / with internal gears / without gearing 
special gearing upon request
Gear module8 - 50 mm

Types of ball bearing slewing rings

single-row-four-point-slewing-bearing
large-diameter-bearings-single-row-four-point-bearing-special-seals-inner-gearing

Single-row four-point bearings

Single-row four-point bearings are used, for example, for the slewing of excavators, the boom movement of tower cranes and as drive elements for large rope winches.

Single-row four-point bearings with special seals

Special forms of seals are always used whenever bearings are exposed to particularly harsh environmental conditions, and protect the slewing bearing, for example, from seawater penetration.
large-diameter-bearings-two-row-four-point-bearing-outer-gearing
large-diameter-bearings-two-row-ball-bearing-no-gearing

Double-row four-point bearings

Double-row four-point bearings can support significantly higher loads than single-row four-point bearings, for an equivalent diameter. They are used in applications with high loads and restricted installation space, such as for rotor blade adjustments on wind turbines.

Double-row ball bearings (double, axial ball bearings, double thrust bearings)

Double-row ball bearing slewing rings are distinguished by their high cost-effectiveness and their robust design. They are used, for example, in crane technology.

Roller bearing slewing rings

FV roller bearings are suitable for medium to high loads. They are designed as standard in triple-row configurations with two axial and one radial roller raceway. Depending on the case of use, other designs and variants are however also available.

Standard series

In addition to customised projects, our portfolio contains a comprehensive standard programme of one-piece FV roller bearing slewing rings.

Technical information

External diameter800 - 7,500 mm
Rolling element diameter12 - 140 mm
Gearingwith external gears / with internal gears / without gearing 
special gearing upon request
Gear module8 - 50 mm

Types of roller bearing slewing rings

rolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearings
rolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearings

Cross roller bearings

On account of their play-free mounting, cross roller bearings offer greater precision than traditional roller bearings. They are used above all in tunnel boring machines and in conveyor technology.

Triple-row roller bearings

In heavy machines, such as mining excavators, roller bearing slewing rings tend to be used mainly on account of the high loads.
rolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearings
rolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearings

Triple-row roller bearings with special seals

Triple-row roller bearing slewing rings can be fitted according to need with specially-developed seal systems. These can protect the bearing in thrusters, for example, against the penetration of seawater while at the same time preventing the leakage of lubricants.

Triple-row roller bearings for TBM

Roller bearing slewing rings for tunnel boring machines are fitted with a preloaded retaining raceway. The cup springs for preloading the raceway ensure that the rolling elements never lose contact with the raceway, thereby guaranteeing optimised wear characteristics.
rolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearings
rolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearings

Roller bearings with bayonet joint

Bearing designs with bayonet joints are used in the presence of a special adjacent construction. This is often the case with cranes

Roller bearings with bolt connection

Bearing designs with bolt connections are used in the presence of a special adjacent construction. This is often the case with cranes

Combined roller and ball bearing slewing rings

Combined roller and ball bearings are designed as standard with a roller raceway (supporting raceway) and a ball raceway (retaining raceway). This makes this type of design particularly suitable for high axial loads and harsh environmental conditions.

Standard series

In addition to customised projects, our portfolio contains a comprehensive standard programme of one-piece FV combined roller and ball bearings.

Technical information

External diameter800 - 8,500 mm
Rolling element diameter16 - 100 mm
Gearingwith external gears / with internal gears / without gearing 
special gearing upon request
Gear module8 - 50 mm
Combined roller and ball bearing slewing ring bearings

Combined roller and ball bearing slewing ring bearings

The combination of roller and ball bearing offers a cost-effective alternative to traditional roller bearing slewing rings. This bearing type is mainly designed for axial loads, and is frequently used in conveyor technology, for example with bucket excavators.

Tapered roller slewing bearings

Tapered roller bearings can be subjected to radial and axial loads. They are suited to high load conditions. The tapered form of the rolling elements ensures optimum rolling characteristics. The play-free bearing mounting makes the tapered roller bearing particularly suitable for the highest precision and accuracy requirements.

Technical information

External diameter800 - 7,500 mm
Average tapered roller diameter40 - 110 mm
Gearingwith external gears / with internal gears / without gearing 
special gearing upon request
Gear module8 - 50 mm
Tapered roller slewing bearings
Tapered roller slewing bearings with no gearing
Optimum rolling characteristics and ideal power distribution are guaranteed by the layout and design of the tapered rollers. This design is used, for example, as the main bearing in wind turbines or in tunnel boring machines.

Gear rings

FV also manufactures gear rings, used for example in rope winch drives or for the yaw adjustment of wind turbines. The gear rings can also be configured in segments according to customer requirements.

Technical information

External diameter800 - 8500 mm
Gearingwith external gears / with internal gears 
special gearing upon request
Gear module8 - 50 mm
Weight25 - 30000 kg
rolling mill bearings, Roll neck bearings, Tapered roller bearings, Spherical roller bearings

Gear rings

FV has developed its own gear cutting machines for the milling of the gear rings. These ensure the best possible gearing results and guarantee optimum precision.

SLEWING RING BEARING CATALOG.PDF