A generator rotor ventilation slot structure

Abstract

The invention discloses a ventilating slot structure of a generator rotor. The ventilating slot structure of the generator rotor comprises a slot bottom filler strip, a rotor winding, a filler strip under a wedge, a damping winding and a rotor slot wedge, wherein at least one channel forming radial ventilating with a vent hole is axially formed in the rotor winding, any two adjacent copper rows form the channel in the axial direction of the rotor winding, an air inlet in the lower part of the channel is slantly distributed in the direction of cooling air, a ventilating duct with an S-shaped cross section is at least arranged at the upper part of the channel, a plurality of copper wires in the axial direction of the copper rows at the upper part of the channel are distributed in a staggered manner, and any two adjacent copper rows form the S-shaped vent duct in the axial direction of the rotor winding. The air inlet in the lower part of the channel is slantly distributed in the direction of the cooling air, so that the air intake resistance of the air inlet of the channel is effectively reduced, the air intake flow rate of the cooling air entering the channel is increased, the cooling air entering through the air inlet in the lower part of the channel enters the S-shaped vent duct to form turbulent flow, so that the ventilating and cooling effects are greatly improved.

Description

technical field [0001] The invention relates to the technical field of generators, in particular to a generator rotor ventilation groove structure. Background technique [0002] A generator is a mechanical device that converts other forms of energy into electrical energy. It is driven by a water turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy and transmits it to the generator. Converted to electrical energy by a generator. Generators are widely used in industrial and agricultural production, national defense, science and technology and daily life. There are many forms of generators, but their working principles are all based on the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is: use appropriate magnetic and conductive materials to form magnetic circuits and circui...

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Problems solved by technology

[0006] In the rotor ventilation structure of the large-capacity air-cooled turbogenerator disclosed in this patent document, the cold air enters from the auxiliary slot, is discharged through two rows of radial air outlet holes, and then enters the air gap to form a radially straight ventilation in the rotor slot. In addition, the second channel Adopt axial ventilation and cooling, the third channel, the cold air enters from the air inlet hole at the end of the rotor, after cooling the end, it enters the air gap from the air outlet hole at the end, forming an alternate ventilation and cooling structure, the entire rotor ventilation structure is quite complicated , and the cooling air in the first channel, the second channel and the third channel will interact with each other, resulting in the unsatisfactory cooling effect of the whole ventilation

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