+1 vote

Mechanical Running Test for Gears operating at 1000 HP or higher?

asked May 4, 2015 in Mechanical by Kodi.Moretz (505 points)
Should gears operating at higher than 1000 HP be subjected to mechanical running test?

2 Answers

+1 vote
answered May 4, 2015 by Tadd Pham (5,620 points) | selected May 6, 2015 by odadmin
Best answer
For gear units above 1000 HP (750 kW), all hydrodynamic bearings should be removed, inspected, and reassembled after the mechanical running tests are complete. Inspection of the hydrodynamic bearings after run testing is a typical practice in industry.  Inspection flags installation and design problems and confirms adequacy of lubrication, cleanliness of oil passages, proper bearing alignment, load capability, etc. prior to operation.
+1 vote
answered May 5, 2015 by chad.trinh (605 points)
Extended mechanical running test should be conducted for all gear units above 1000 HP (750 kW). A one-hour run test is not sufficient for high power, more expensive gear units.  The extended mechanical running test should be conducted on these units.  This is particularly important when a variable speed driver will be used as the extended mechanical run test includes a brief run at 110 percent of maximum continuous speed.