Table of Contents
Advertisement
Page 18
8.
GEAR RUN OUT:
8.1
Measurement Principle
Most rotary kilns and many ball mills are driven by open gear drives (pinion and girth gear). Due to
difficulties during the installation or later during the operation, the girth gears might do not run
concentrically nor straight.
The so-called axial and radial run-out can be measured, both in the same time, with the IDM Tool
Kit during normal operation.
•
Radial Run-Out:
Results in a change of center distance and affects the tooth engagement it is measured on
the tip of the teeth.
•
Axial Run-Out:
Affects the load distribution over the tooth width and is measured on a machined side face
of the girth gear or on the side face of the teeth.
8.2
Place the Sensor
To measure the axial and radial run-out, two inductive sensors, typically Ø18mm are placed
somewhere on an inspection window in the girth gear cover where is access to the tooth tip and to
a machined side face of the girth gear.
(See pictures below)
Safety (first see page 3):
Never place sensors where the teeth are engaging; place them always on the out running side
or far away from the pinion, to avoid items get caught between.
Axial Sensor
(on side face)
Kiln Girth Gear
Radial Sensor
(on tooth tip)
April 4, 2022
Magnet Stand
Advertisement
Table of Contents
