Gearbox Efficiency
Gearbox Efficiency
(OP)
Can anyone provide the formula for calculating the efficiency of a gearbox where gearbox temp is a variable?
Thanks!
Thanks!
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RE: Gearbox Efficiency
TygerDawg
RE: Gearbox Efficiency
The rule of thumb I use for efficiency is 3%-5% per reduction for spur and helical and the ratio equals the loss on worm gears. A two stage helical reducer will be 94%-90% efficient and a 60:1 worm gear will be 40% efficient. Remember that worm gears have high starting friction for the first half turn of the output shaft until the oil gets in mesh.
Hypoid gear efficiency can vary greatly between manufactures. I think GTR/Brother has the only high efficiency high reduction hypoid. There are a few manufactures that can do a good hypoid, 5%, up to about 5:1, GTR/Brother and Sumitomo are two. SEW has a something that resembles a hypoid, Spiroplan, but is very inefficient and should be avoided.
Barry1961
RE: Gearbox Efficiency
For overall gearbox efficiency, you'll also need to include beaaring friction, windage, lube churning, and seal friction.
RE: Gearbox Efficiency
RE: Gearbox Efficiency