FRP insulating sleeve for wind power generator and forming method thereof

Abstract

The invention discloses a glass reinforced plastic insulating sleeve for a wind driven generator and a molding method of the glass reinforced plastic insulating sleeve. The glass reinforced plastic insulating sleeve is characterized by being formed by assembling a plurality of concentric and equal-radian arc-shaped barrel walls into a barrel shape and pasting the barrel on a stator of the wind driven generator; and the glass reinforced plastic insulating sleeve has the outer diameter of 3000-6500mm, the length of 1500-2500mm and the thickness of 2.0-6.0mm. The molding method comprises the following steps of: (1) selecting raw materials for later use; (2) molding a plurality of concentric and equal-radian arc-shaped barrel walls by a mould; and (3) assembling the arc-shaped barrel walls processed in the step (2) and pasting the assembled arc-shaped barrel walls onto the stator of the wind driven generator to constitute the glass reinforced plastic insulating sleeve. As one of major parts of a wind driven generator evaporative cooling system, the glass reinforced plastic insulating sleeve is integrally pasted with a stator iron core to achieve favorable airtightness and insulating property, the defects of low external pressure resistance, poor airtightness and the like of the traditional insulating sleeve of the wind driven generator are overcome, a composite material RTM (ResinTransfer Molding) process is adopted, and the maneuverability is strong and the popularization and the application are facilitated.

Description

technical field [0001] The invention relates to an insulating sleeve for a wind power generator and a forming method thereof, in particular to a glass fiber reinforced plastic insulating sleeve for a wind power generator and a forming method thereof. Background technique [0002] The insulating sleeve of the wind turbine is located between the rotor and the stator of the generator. It is one of the main components of the evaporative cooling system of the wind turbine. Since the stator has a strong heating phenomenon in the working state, it needs to be treated with Freon and other media. Cooling requires a sleeve made of a material that has certain rigidity, good insulation performance, and can be sealed and isolated for isolation. At present, the insulating sleeves of wind turbines are mostly made of integral non-magnetic materials, and the working stator is cooled by forced air cooling and liquid cooling. This cooling method is only suitable for low motor loads, small cool...

AI Technical Summary

Problems solved by technology

At present, the insulating sleeves of wind turbines are mostly made of integral non-magnetic materials, and the working stator is cooled by forced air cooling and liquid cooling. This cooling method is only suitable for low motor loads, small cooling capacity, small The cooling requirements of high-power motors; it cannot meet the cooling requirements of large cooling capacity, high adjustment ability and stability requirements in high-power wind power generation systems; at the same time, it must meet the requirements of high-power wind power generation systems, and the insulating sleeve is bulky. The self-weight of the magnetic material is heavy, which makes it difficult to transport and install the insulating sleeve

Due to the light weight, high strength, good toughness and good insulation properties of FRP, it has been considered as the first choice material for the insulating sleeve of the evaporative cooling system; it has been reported that the FRP insulating sleeve is formed by the fiber winding process. The body is an integral structure, and its resistance to external pressure is relatively good; its disadvantages are: the safety of the bonding process is low, the bonding surface cannot be pressurized, and the bonding quality is difficult to guarantee; when the bonding surface does not meet the requirements, it needs its own Rigidity to bear the external pressure; therefore, the cost of bonding tooling is high; the site occupies a large area, and transportation is inconvenient

In particular, the integral molding of filament winding cannot solve the technical defects such as low external pressure resistance and poor air tightness based on the rigidity of the insulating sleeve itself.

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