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General Instruction of turbo-generator

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SHANDONG QINGNENG POWER CO., LTD.

[Weifang,Shandong,China,Asia]

Business Type:Trading,Machining,Servicing

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(1)Characteristic and performance analysis of main parts of generator Stator:The base seat is welded with steel sheets, and the frame is light but strong. It is axially divided into several air inlet and outlet areas; Rotor processing:The shaft is integral forged with high-quality alloy steel and processed with axial slots for rotor winding inserting. The slots are processed by special machine for generator rotor processing, Tacchi high precision horizontal slotting and milling machine made in Italy, to ensure the high efficiency of generator. Stator coil: It is stacked by multistrand of dacron glass silk-wrapped copper wires alternately with structure of half-unit type and basket shaped (parts of stator coils use transposition structure). The insulation grade of the stator coil is F grade. The stator coil is shaped by continuous wrapping and mould pressing with mica tapes. The coil end is firmly tied up to the support and the bundling ring with unidirectional tapes or dacron-glass ropes thus the turbo-generator unit became highly resistant towards sudden short-circuit conditions. Rotor: The rotor is composed of shaft, coil, center ring, shroud ring and fan ring etc.The rotor coil is made of cold-drawn flat copper wires, and processed by oxygen-free annealing. The rotor coil of generator with 50MW and above is welded together by silver-bearing cold-drawn copper wires and adopts F grade insulation. The shroud ring at rotor coil end is made up of non-magnetic steel.Both ends of the rotor are equipped with centrifugal fan or axial flow fan with paddle fan blade which is forged by high-strength aluminum alloy. Silicon-steel sheets: Core is coined and pressed by high-quality cold rolled silicon-steel sheets of non-orientation, high permeability and low loss. Both sides of the silicon-steels sheet are covered with indurative insulation paint film to prevent short circuit between the stator core sheets and r

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