Repair method on the tower of the cooling water pipe rupture of the semi-direct drive permanent magnet synchronous wind turbine

Abstract

The invention discloses a method for repairing the cracked cooling water pipe of a semi-direct drive permanent magnet synchronous wind power generator on a tower. Aiming at multiple parallel cooling water pipes inside the generator and exposing the stator core, each cooling water pipe is equipped with a Water pipe joints, the method is to find the leaking position of the cooling water pipe first, then protect the surroundings of the cutting point of the cooling water pipe, and then judge whether the leaking water pipe is the outermost water pipe, if so, cut the leaking water pipe directly, if not, first cut the leaking water pipe Cut all the side-by-side water pipes on the outside of the water pipes and then cut the leaking water pipes, then cut off the water pipe joints and perform external chamfering processing, and also expand the cut water pipe incisions, and finally insert the processed water pipe joints into the expanded In the cut of the water pipe and clamp it tightly, and then weld the two to fix it. The present invention no longer generates expensive hoisting costs for the generator to be lowered from the tower, and also greatly shortens the maintenance time of the generator, thereby reducing the loss of power generation caused by the shutdown of the unit.

Description

technical field [0001] The invention relates to the technical field of repairing cracked cooling water pipes of semi-direct-drive permanent magnet synchronous wind-driven generators, in particular to a tower-mounted repair method for cracked cooling water pipes of semi-direct-drive permanent-magnet synchronous wind-driven generators. Background technique [0002] It is known in the industry that the semi-direct drive permanent magnet synchronous wind turbine adopts the air-water cooling cooling method. Several copper tubes with a diameter of 22mm are embedded in the stator core of the generator. The copper tubes are installed on the stator core according to the heat dissipation requirements of the generator. Evenly distributed into several groups of inlet and outlet pipe structures, all inlet and outlet pipes are surrounded by the end of the stator and lead out from the top of the generator. Due to its ultra-compact structure, the distance between the inner stator coil of the...

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Problems solved by technology

[0002] It is known in the industry that the semi-direct drive permanent magnet synchronous wind turbine adopts the air-water cooling cooling method. Several copper tubes with a diameter of 22mm are embedded in the stator core of the generator. The copper tubes are installed on the stator core according to the heat dissipation requirements of the generator. Evenly distributed into several groups of inlet and outlet pipe structures, all inlet and outlet pipes are surrounded by the end of the stator and lead out from the top of the generator. Due to its ultra-compact structure, the distance between the inner stator coil of the generator and the inlet and outlet pipes at the end is very close. During long-term operation, due to vibration and other reasons, the friction between the water pipe and the stator winding will eventually cause the insulation layer of the winding to wear out, and the discharge will break down, causing the water inlet and outlet pipes at the end of the generator stator to break and leak, causing the generator to fail to operate

Due to the small space inside the engine room, usually the generator can only be dismantled and hoisted to the ground, and then the generator is disassembled to repair the water leakage point. The entire hoisting cost is extremely high and the maintenance cycle is long

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