Worm Gear Slew Drive Drived By Electric Motor And Gear Box For
Solar Tracking System
The Slewing Drive, also called slewing ring bearing, is a kind of
product able to withstand large axial loads with very low speed.
And depending on the type also are well suited to absorb tilting
moment. Slewing rings are available in industrial models, in which
the rings are made from forged steel and hardened ball tracks are
also implemented. As technology has improved, more slewing drives
are using hourglass worm technology, in which the worm is shaped to
engage more teeth in the gear. This increased tooth engagement
results in greater strength, efficiency and durability.The slewing
drive uses standard worm technology in which the worm on the
horizontal The speed ratio of the shaft depends on the relationship
between the number of threads on the worm and the number of teeth
in the worm gear or gear. They are standardized products for
specific industries such as the solar industry and mobile
applications such as excavators. The worm are powered by an electric motor or hydraulic motor, whether or not combined with
an additional planetary gear box, worm gear box etc.
Performace of SE Series
|Model||Ratio||Rated Output Torque(N.m)||Tilting Torque (N.m)||Holding Torque (N.m)||Axial Load (kN)||Radial Load (kN)||Efficiency||Precision (°)||Self-locking||Weight (kg)|
Installation of the Slew Drive
1. Clean the mounting structure, e.g. from welding, galvanizing,
residues, dirt, etc.
2. Lift the slew drive with eye bolts.
3. The slew drive shall be mounted in unloaded condition.
4. The following procedure shall be followed in order to avoid
deviations between bolt tightening forces.
5. Apply thread lock liquid to threads.
6. Lay thread lock liquid on thread gap requesting fitting parts
7. Preload the bolts crosswise. See the general pattern in sketch
below of how bolts get torque in crosswise sequence. Start with
either inner or outer ring. Do the crosswise torqueing of all bolts
to 30% of tightening torque. Then repeat crosswise torque to 80% of
tightening torque. Finally crosswise torque to 100% of the
1. First completely torque inner or outer ring, then do the other
2. Once the screw is tightened, please permanently mark the
position of the screw head to that of the stationary structure.
This will be used later during inspection to be sure the screw head
has not unwound.
There are many applications where a rotary drive can be used,
primary because it is well suited for applications that require
load to maintain power and rotational torque.
Typical swing drive applications include, but are not limited to:
solar tracker, wind turbine, men's lift, hydraulic machinery,
telehandler, excavator derrick, lift, cranes, drilling equipment,