Audited Supplier
steam turbine
Nanjing
Standard
3x16mw
China
Product Description
1,Specification of steam turbine
- Manufacturer :Najing Steam Turbine Motor Factory
- Model :B6-4.90/0.981
- Rated power :6MW
- Rated rotary speed:3000r/min
- Rotary direction:clockwise as steam flux direction
- Criticality rotary speed:1596r/min
- Front steam pressure of main steam valve :4.90-0.3+0.2 MPa
- Front steam temperature of main steam valve :470ºC-15+10
- Exghaust steam absoulate pressure:0.981MPa
- Rated exghaust steam temperature :291.5ºC
- Movity pressure of safety door :1.23MPa
- Max vibration of bearing over criticality rotary speed:≤0.15mm
- Max vibration of bearing at working rotary speed:≤0.03mm
- Efficient of steam turbine at working condition:0.7517
- Loss of steam turbine at working conditions:11.48kg/kwh
- Thermal loss of steam turbine ar working conditions:4049kJ/kwh
- Body weight of steam turbine :31t
- Disconnect plat weight :9.2t
- Rotary of steam turbine weight :1.906t
- Size of steam turbine :(L×W×H)4582×2660×3085mm
- Middle height of steam turbine :750mm
- Generator
Rated power :6800kw
Rated rotary speed :3000r/min
Voltage :6300V
- Excitor
Power :50kw
Voltage :163V
Current :307A
3,Auxillary equipments
- Oil tank :V=3300liter
- Clloing condensing unit :
Cooling area:20m2
Oil side pressure :0.99MPa
Water side pressure :0.66MPa
- Oil filter :LY-80
- Air cooling unit
Max pressure :0.196MPa
Power :230kw
Wind flux :7.5m3/s
Water pressure lower :0.0051MPa
Wind resistor pressure lower :288Pa
Clooing water temperauture :≤33ºC
Consumption of water :65m3/h
- steam seal heater :JQ-10/20
- High pressure AX OIL pump
FLUX :79m3/h
LIFT :75m
MOTOR CAPACITOR :37kw
ROTARY SPEED :2950r/min
Rted current :69.8A
Rated voltage :380V
- Accudnt DC oil pump
FLUX :18m3/h
LIFT :36m
MOTOR CAPACITOR :5.5kw
ROTARY SPEED :1000r/min
RATED CURRENT :30.4A
VOLTAGE :220V
4.SPECIFICAITON OF REGUALTION AND SEFETY SYSTEM
- STEAM TURBINE RATED ROTARY SPEED: 3000r/min
- Main oil pump output oil pressure: 1.08MPa
- Impulse pump output oil pressure : 0.687MPa
- Oil pump group Inlet oil pressure : 0.098MPa
- Synchronizer adjustment range without load: 2880~3180r/min
- Regulator regulation range: 0.785~1.275MPa
- Speed Unequal rate 5±1%
- Pressure unequal rate ≤10%
- Speed regulation System delay rate: ≤0.5%
- Impulse oil pressure (first time) : 0.392MPa
- Oil Motive Stroke without load: 13mm
- Oil Motive Strokewith load: 76.8mm
- Emergency breaker working speed: 3270~3330r/min
- Emergency breaker recovery speed: <3050r/min,by manual
- Emergency breaker working speed at oil spouting test : 2920±30r/min
- Working speed of digital speed meter: 3360r/min
- Rotor axial Displacement alarm value : +1.0~-0.6mm
- Rotor axial Displacement protative value: +1.3~-0.6mm
- Bearing return oil temperature alarm value: 65ºC
- bearing return oil temperature protative value: 75ºC
- bushing Temperature alarm Value 105ºC
- bushing Temperature Protection Value: 110ºC
- lube oil pressure lower: ≤0.05MPa high pressure pump start
- lube oil pressure lower : ≤0.04MPaDC oil pump start
- lube oil pressure lower (protetive) ≤0.02MPa stop
- lube oil pressure lower ≤0.015MPa stop
- lube oil pressure riser ≥0.12MPa high pressure oil pump stop
- lube oil pressure riser : ≥0.15MPa DC oil Pump
- auto main steam door shut down time : <1s
