Description
Introduction:
Slewing bearing, also called
slewing ring bearing, is a bearing that can bear large axial load,
radial load and overturning moment. Slewing bearings generally have
installation holes, inner teeth, outside teeth, lubricants holes
and sealing devices, which enable the main frame structural
compact, guide reliable, and easy to
maintain.
Slewing bearings are divided
into various specifications including single-row ball slewing
bearings with outer teeth or inner teeth, or without teeth,
single-row cross roller slewing bearings, double-row different
diameter balls slewing bearings, and three-row roller slewing
bearings etc, of which, single-row ball slewing bearings have
higher static load capacity; While single-row cross roller slewing
bearings have higher dynamic load
capacity,
Slewing bearing applications
1. Wind
generator
Each wind turbine equipment
use three sets pitch bearings and a set of yaw bearing. pitch
bearing ring material select *2CrMo, treatment with the overall
quenching, raceway select
surface-hardening.
2. Marine
Crane
In general, marine crane use
double-row different diameter ball, four-point contact ball,
three-row roller inner gear structure slewing
bearings.
3. Offshore
crane
According to different requirement
for carrying capacity, offshore crane usually use four-point
contact ball slewing bearing and three-row roller inner gear
slewing bearing.
4. Port mobile
crane
Port cranes usually use internal
or external gear, 4 meters in diameter three rows roller slewing
bearings to withstand high overturning
moment.
5.
stacker-reclaimer
Slewing bearing stacker-reclaimer
usually use is ball column combined type, three-row roller and
cross-roller, the majority diameter over 3 meters. Due to poor
working conditions, dusty, these bearings have high load capacity,
long life and good sealing performance
feature.
6. Ladle turret in steel
plant
Usually these bearing are
three-row roller slewing bearings, because work in the dust and
high temperature conditions, so s have high demands for maintain,
grease and seal.
7. These bearings also used for
engineering machinery, ferris wheel, ship unloaders and tower
crane.
Three-row Roller Slewing
Bearing:
The three Row Roller Slewing Bearing has three seat-rings, which
separate the upper, lower and radial races, via which the load of
each row of the rollers may be specified. It may bear different
loads simultaneously and its load capacity is the largest one among
the four models.
