Page 321 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair
P. 321
Typical Gear Unit Arrangements 301
Figure B-4. Two extremely high horsepower single reduction gear units
(identical to the one in Figure B-3) undergoing full load, full speed back-
to-back locked-torque testing. This test is fully instrumented for vibra-
tion and temperature monitoring, It provides the most reliable indications
of gear accuracy and operating temperatures as compared to other test
procedures and in general gives the best overall prediction of gear perfor-
mance in the field. This test can be performed using a driver with a
horsepower rating equivalent to the combined horsepower losses of the
gear units.
