Sale shanghai electric power generation motor slot wedges and
stator or rotor Large-scale generators are one of the three
major mainframes of modern power plants and belong to the core
equipment of power plants. Damage to generators will cause huge
economic losses to power plant production and operation, and even
threaten the power supply security of the power grid in the core
load area. Therefore, it is very important to ensure the safe and
stable operation of large-scale generator sets, and the stator
bars, which are the most important components of the generator,
will be subjected to alternating magnetic field forces during
operation. Due to the quiver of the iron core, the main insulation
material will undergo slight thermal expansion and contraction. As
a result, the wedges are seriously loosened and partially detached,
which in turn exacerbates the vibration of the bar. The mechanical
strength and dielectric properties of the main insulation tend to
deteriorate. Long-term operation will lead to wear of the
insulation layer, causing eddy currents and spark discharges,
resulting in electric corrosion. Until the insulating layer breaks
down, it eventually leads to a generator short-circuit accident and
damage. Therefore, it is particularly important to periodically
check the tightness of the stator wedge. During the overhaul period
of our plant, we detected the tightness of the generator slot wedge
after the rotor has been extracted as a key generator overhaul
project. More than half of the slot wedges were found after the
professional technicians together with the motor manufacturer
technicians inspected the stator slot wedges. Below the Leeb
hardness test standard. After consultation with power plant
professionals, power plants, research institutes and power plants
of the same type, the power plant professionals held a special
seminar to determine the treatment opinions, scope, and plans.
1 Stator slot wedge
fixing structure
The conventional
slot fixing method of the generator factory is that after the
stator bar is inserted into the stator slot, it is fastened with a
pad strip and a slot wedge, as shown in FIG. 1 . This fixing method
makes the slot wedge and the bar rigid. Contact, due to thermal
expansion and contraction phenomenon and long-term operation of the
insulation material such as a certain shrinkage, groove wedge will
appear loose phenomenon
NO.Electric Furnace TypeInput power(KW)input voltage(V)Input current(A)Rated power(KW)DC current(A)DC voltage(V)Melting rate(T/H)working frequency(HZ)working voltage(V)cooling water pressure(MPA)Rated capacity(T)Power consumption(KWH/T)Power SupplyFurnace body1GW-0.25-160/1JJ180380(6 Pulse)2561603205000.2410007500.1~0.150.25~0.30.257902GW-0.5-250/1JJ280380(6 Pulse)4002505005000.4100015000.1~0.150.25~0.30.57703GW-0.5-250/1J280380(6 Pulse)4002505005000.4100015000.1~0.150.25~0.30.57704GW-0.75-400/1JJ400380(6 Pulse)6504008005000.6100015000.1~0.150.25~0.30.757705GW-0.75-400/1J400380(6 Pulse)6504008005000.6100015000.1~0.150.25~0.30.757706GW-1-500/1JJ550380(6 Pulse)80050010005000.8100015000.1~0.150.25~0.317507GW-1-750/1JJ800380/690(6 Pulse)1200/7007501500/850500/8800.91000/5001500/26000.1~0.150.25~0.31720/6608GW-1-750/1J800380/690(6 Pulse)1200/7007501500/850500/8800.91000/5001500/26000.1~0.150.25~0.31720/6609GW-1.5-1000/0.5JJ1100690(6 Pulse)912100011408801.250026000.1~0.150.25~0.31.570010GW-1.5-1000/0.5J1100690(6 Pulse)912100011408801.250026000.1~0.150.25~0.31.570011GW-2-1500/0.5JJ1650690(6 Pulse)1360150017008801.750026000.1~0.150.25~0.3267512GW-2-1500/0.5J1650690(6 Pulse)1360150017008801.750026000.1~0.150.25~0.3267513GW-2-2000/0.5JJ2200690(6 Pulse)1400200022758801.950026000.1~0.150.25~0.3265014GW-3-2500/0.5JJ2750690/950(6 Pulse)2275/170025002840/2080880/12502.565002600/32000.1~0.150.25~0.33610/56015GW-3-2500/0.5J2750690/950(6 Pulse)2275/170025002840/2080880/12502.565002600/32000.1~0.150.25~0.33610/56016GW-4-3000/0.5J3300690/950(6 Pulse)2730/204030003410/2500880/12503.25002600/32000.1~0.150.25~0.34610/56017GW-5-4000/0.5J4400950(6 Pulse)2300400033301250550034000.1~0.150.25~0.35600/55018GW-6-4000/0.5J4400950(12 Pulse)2300400033301250550034000.1~0.150.25~0.36600/55019GW-8-5000/0.5J5000950(12 Pulse)34005000420012507~850034000.1~0.150.25~0.38600/55020GW-10-6000/0.5J6300950(12 Pulse)37506000460012508.5~950034000.1~0.150.25~0.310600/55021GW-12-8000/0.25J8000950(12 Pulse)49008000600012509~10.525034000.1~0.150.25~0.312600-55022GW-15-8000/0.25J8000950(12 Pulse)49008000600012509~10.525034000.1~0.150.25~0.315600-55023GW-15-10000/0.25J10000950(24 Pulse)6500100008000125013~1525034000.1~0.150.25~0.315600-55024GW-18-12000/0.25J12000950(24 Pulse)81601200010000120015~1725034000.1~0.150.25~0.318600-55025GW-20-12000/0.25J12000950(24 Pulse)81601200010000120017~1925034000.1~0.150.25~0.320600-55026GW-25-14000/0.25J14000950(24 Pulse)94601400011600120019~21150~20034000.1~0.150.25~0.325600-55027GW-30-16000/0.2J16000950(24 Pulse)108501600013300120021~23150~20034000.1
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