field balancing of gas turbine - mgt40 of zahedan power plant

There is no single cause of undesirable vibration according in rotating machinery. poor operation conditions like loose mechanical parts, faulty impellers, faulty bearings, faulty gears, unbalanced machine elements, whirling, misalignment and unbalanced shaft intensity vibration in rotating machine. mostly vibration have a good signs from machine’s health in. this paper rotational unbalance due to gearbox cooling electrofans of gas turbine of zahedan power plant was single out as a cause of vibration and its nature, causes, effects and remedies explored an explained. corrosion between fan and electromotor’s shaft caused chang bush. therfore they need balance again. analytical equations derived for single plane balancing of experimentally determined unbalance. put validation between shenk set-up data and manual data out. different between both results showed a good and acceptable agreement. in additional matlab program can be a good tool for achievement quick solution, special when double plane balancing problems or more need derived. after balancing the machine, vibration reduces from 0.7 to 0.2 and it’s a good and acceptable value for this type of machine.