TY - GEN
T1 - Calculation of friction coefficients in journal bearings to determine the turning gear motor power
AU - Manoj Kumar, A. P.
AU - Nayak, Nagaraj S.
PY - 2012/12/31
Y1 - 2012/12/31
N2 - Steam turbine turning gear is a gear train, driven by electric motor, which is used to drive the rotor at a given speed and capable of breaking away the turbine and its load equipment from a standstill. Steam turbine rotor trains are supported by journal bearing which require lube oil for cooling. The normal turning gear operation requires that lube oil and the lift oil systems must be inservice in order to reduce the friction coefficient at the journal bearings during breakaway. The rotor train breakaway and running torque is the resisting moments at each of the journal bearings. The resisting moments at each journal bearing are functions of bearing loading, pad type, journal diameter and friction. Therefore, it is important to determine the static and dynamic coefficient of friction in journal bearings of the rotor system to design the turning gear motor power. In the present work, a detailed study has been made for calculating the static and dynamic friction coefficients in the bearings and validated the values with experiments for designing a suitable motor to run the rotor of a steam turbine.
AB - Steam turbine turning gear is a gear train, driven by electric motor, which is used to drive the rotor at a given speed and capable of breaking away the turbine and its load equipment from a standstill. Steam turbine rotor trains are supported by journal bearing which require lube oil for cooling. The normal turning gear operation requires that lube oil and the lift oil systems must be inservice in order to reduce the friction coefficient at the journal bearings during breakaway. The rotor train breakaway and running torque is the resisting moments at each of the journal bearings. The resisting moments at each journal bearing are functions of bearing loading, pad type, journal diameter and friction. Therefore, it is important to determine the static and dynamic coefficient of friction in journal bearings of the rotor system to design the turning gear motor power. In the present work, a detailed study has been made for calculating the static and dynamic friction coefficients in the bearings and validated the values with experiments for designing a suitable motor to run the rotor of a steam turbine.
UR - http://www.scopus.com/inward/record.url?scp=84871595708&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84871595708&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMM.232.869
DO - 10.4028/www.scientific.net/AMM.232.869
M3 - Conference contribution
AN - SCOPUS:84871595708
SN - 9783037855140
T3 - Applied Mechanics and Materials
SP - 869
EP - 873
BT - Mechanical and Aerospace Engineering
T2 - 2012 3rd International Conference on Mechanical and Aerospace Engineering, ICMAE 2012
Y2 - 7 July 2012 through 8 July 2012
ER -