Based on present experience, the ISO has categorized the normally available rigid rotors into various groups and have suggested the balancing levels for them in ISO-1940 specifications. The following table gives the level to which a rotor should be balanced.
QUALITY
GRADE 'G' ROTOR TYPES - GENERAL EXAMPLES
G 4000 Crankshaft drives of required mounted slow marine diesel engines with uneven number of cylinders.
G 1600 Crankshaft drives of rigidly mounted on large two cycle engines.
G 630 Crankshaft drives of rigidly mounted large four-cycle engines. Crankshaft drives of elastically mounted marine diesel engines.
G 250 Crankshaft drives of rigidly mounted last four cylinder diesel engines.
G 100 Crankshaft drives of fast diesel engines with six and more cylinder complete engines (gasoline or diesel) for cars, trucks and locomotives.
G 40 Car wheels, wheel rims, wheel sets, drive shaft; crankshaft drives of elastically mounted fast four-cycle engines (gasoline or diesel) with six and more cylinders; crankshaft drives for engines of cars, trucks and locomotive.
G 16 Drive shafts (propeller shafts, cardan shaft) with special requirements; parts of crushing machinery; parts of agriculture machinery. Individual component of engines (gasoline or diesel for cars trucks and locomotive; crankshaft drives of engine with six and more cylinders under special requirements.
G 6.3 Parts of process plant machines. Marine main turbine gears (merchant service), centrifugal drums, fans, assembled air craft gas turbine rotors, fly wheels, pump impellers, machine tool and general machinery parts, normal electrical armatures, individual components of engines under special requirements.
G 2.5 Gas and steam turbines including marine main turbines (merchant service), rigid turbo- generator rotors, turbo-compressors, machine tools drives medium and large electrical armatures with special requirements, small electrical armatures, and turbine driven pumps.
G 1 Tape recorder and photograph (gramophone) drives, grinding machine drives, small electrical armatures with special requirements.
G 0.4 Spindles, discs, and armature of precision grinders, gyroscopes.
QUALITY
GRADE 'G' ROTOR TYPES - GENERAL EXAMPLES
G 4000 Crankshaft drives of required mounted slow marine diesel engines with uneven number of cylinders.
G 1600 Crankshaft drives of rigidly mounted on large two cycle engines.
G 630 Crankshaft drives of rigidly mounted large four-cycle engines. Crankshaft drives of elastically mounted marine diesel engines.
G 250 Crankshaft drives of rigidly mounted last four cylinder diesel engines.
G 100 Crankshaft drives of fast diesel engines with six and more cylinder complete engines (gasoline or diesel) for cars, trucks and locomotives.
G 40 Car wheels, wheel rims, wheel sets, drive shaft; crankshaft drives of elastically mounted fast four-cycle engines (gasoline or diesel) with six and more cylinders; crankshaft drives for engines of cars, trucks and locomotive.
G 16 Drive shafts (propeller shafts, cardan shaft) with special requirements; parts of crushing machinery; parts of agriculture machinery. Individual component of engines (gasoline or diesel for cars trucks and locomotive; crankshaft drives of engine with six and more cylinders under special requirements.
G 6.3 Parts of process plant machines. Marine main turbine gears (merchant service), centrifugal drums, fans, assembled air craft gas turbine rotors, fly wheels, pump impellers, machine tool and general machinery parts, normal electrical armatures, individual components of engines under special requirements.
G 2.5 Gas and steam turbines including marine main turbines (merchant service), rigid turbo- generator rotors, turbo-compressors, machine tools drives medium and large electrical armatures with special requirements, small electrical armatures, and turbine driven pumps.
G 1 Tape recorder and photograph (gramophone) drives, grinding machine drives, small electrical armatures with special requirements.
G 0.4 Spindles, discs, and armature of precision grinders, gyroscopes.
No comments:
Post a Comment