Maintenance-free connecting device and method for large wind driven generator tower

Abstract

The invention discloses a maintenance-free connecting device and method for a large wind driven generator tower. The maintenance-free connecting device comprises a connecting part which is used for bearing transverse loads which are caused to the draught fan tower under the common effect of the capsizing moment of wind and various kinds of vibration in draught fan operation. The connecting part is arranged in a bolt connecting combination of the draught fan tower. The maintenance-free connecting device and method have the beneficial effects that operation is simple and convenient, a gap between a connecting bolt and a hole wall of the bolt can be completely eliminated, and a certain magnitude of interference is formed; meanwhile, huge pressing force is generated between the connecting bolt and the hole wall of the bolt, reliable connection is achieved, and therefore transverse loads can be borne; and meanwhile the installing and manufacturing cost is obviously reduced, the device is applied to the part between tower flanges to form connection, no relative displacement exists between the tower flanges, and in other words, the two butt joint flanges are riveted into a whole. Thus, connection loosening cannot be caused to the tower when the tower is subjected to static loads, dynamic loads, the capsizing moment of the wind and various kinds of vibration, the bolt loosening problem is solved fundamentally, and the connecting bolt does not need to be checked or maintained within the continuous service life of 20 years of a draught fan.

Description

technical field [0001] The invention relates to a maintenance-free coupling device and a coupling method for a large-scale wind power generator tower. Background technique [0002] Wind power is a green energy with great potential, and it is expected to maintain a high-speed development trend for a long time in the future. Wind turbines with a power of more than 100 kilowatts are called large wind turbines (hereinafter referred to as fans); the towers of large wind turbines are usually made of tapered steel pipes. The function of the tower is to support the power generation system into the air. The higher the tower, the more wind energy the wind turbine can obtain. The tower of a large wind turbine is tens of meters or even hundreds of meters high. For the convenience of manufacture, transportation and installation, large-scale towers are generally divided into several sections. Taking a wind turbine tower with a power of 1500 kilowatts and a height of 80 meters as an examp...

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