Description
Slewing bearing
is a kind of special bearing, which can bear combined axial, radial
and tipping moment. Generally, slewing bearing is equipped with
installation holes, lubricating holes and sealing devices in order
to meet various requirements of main equipments in various
operation conditions. Besides, slewing bearing is featured in
compact in structure, convenient to guide and rotate, easy for
installations and maintenance. It is widely used for rotary devices
or rigging and transportation equipment, excavating equipment, port
equipment, medial equipment and military
equipment.
As per to its
structures, slewing bearing falls into five types:
1. Four Point
Contact Ball Slewing Ring
2. Double-Row
Ball Slewing Ring
3. Crossed
Roller Slewing Ring
4. Three-Row
Cylindrical Roller Slewing Bearing
5. Ball-roller
type slewing bearing
As per to the
gear, the above types are classified into :
1. No
gear.
2. Inside
gear
3. Outside
gear
Featured with
various structures, slewing bearings could meet the requirements of
main working equipment in various working
conditions.
CHARACTERISTIC
OF STRUCTURE, PERFORMANCE, APPLICATION RANGE
1. Four Point
Contact Ball Slewing Ring
The
Single-Row Four Point Contact Ball Slewing Ring is composed of 2
seat-rings, compact structure,light weight,and the steel balls do
contact with 4 points of the circular orbit, so it can undertake
the Axial Force, Radial Force and Tipping Moment at the same time.
By the way, it is suitable for many Engineering Machinery, for
example, Slewing Conveyer, Welding Operation
Machine,Pint-size&Medium-sized Crane,and so on
2. Double-Row
Ball Slewing Ring
The
Double-Row Ball Style Slewing Ring has three seat-rings, Steel
Balls and Spacers may be poured directly into upper&nether
orbits. Two rows of upper&nether Steel Balls of different
diameters can be assembled according to Undertaking Power
situation.The kind of open-pattern-assembly is very convenience.
The load-angles of upper&nether circular orbit are *0 °, so it
is able to undertake very large Axial Force and Tipping Moment.When
Radial Force is 0.1 multiple of Axial Force,the orbit need to be
redesigned.The axial&radial size of this kind of Slewing Ring
all are rather big and the structure is firm,so it is especially
suitable for some Loading&Unloading Machines of over-medium
diameter,such as,Tower Crane,Truck crane,and so
on.
3. Crossed
Roller Slewing Ring
The Single-Row
Crossed Roller Slewing Ring is composed of two seat-rings, compact
structure,light weight,small assembly-clearance,high
installation-precision,and the rollers are arranged across as 1:1
proportion, so it is capable of undertaking the Axial Force,rather
large Radial Force and Tipping Moment at the same time.By the
way,it is widely suitable Hoisting&Transporting
Machine,Construction Machinery as well as Martial
Machinery
4. Three-Row
Cylindrical Roller Slewing Bearing
Three-Row
Roller Slewing Ring has 3 seat-rings,Upper Orbit,Nether Orbit and
Radial Orbit are separated individually,it makes the load of each
row of the rollers can be confirmed,so it can undertake all kinds
of different load simultaneously and it's Carrying Capacity is the
biggest among four models,one more thing,the axial&radial size
are rather large to some extent and the structure is very firm,so
it is especially suitable for many heavy-duty machines which
require bigger diameter,such as,Bucket-Wheel Excavator,wheeled
Crane,Shipyard Crane,heavy-duty Truck Crane,and so
on.
5. Ball-roller
type slewing bearing(with gear teeth)
