A wind turbine tower evacuation tool is provided including an object end for attachment to an object or a person and a roller end configured for connection to a surface of a wind turbine tower by magnetic attraction. The roller end includes at least one magnet body arranged for rotation around a rotational axis of the roller end. The wind turbine tower evacuation tool further includes a rope element connecting the object end to the roller end.

A turbine system configured to convert fluid energy into electrical power is disclosed. The turbine system includes a tubular frame, a shaft disposed in the tubular frame, a fan coupled to the shaft, and at least one turbine that utilizes rotation of adjacent copper coil discs and magnetic discs to generates energy when a fluid impinges the fan. This configuration allows for a smaller turbine system that may be placed in various compact spaces and that provides a localized, efficient source of electrical energy

A fatigue-resistant load-bearing steel for a wind turbine main shaft, and a manufacturing method and a use thereof are provided. The manufacturing method includes: step S1, smelting: smelting a raw steel into a molten iron, followed by impurity removal and deoxidation, and adjusting contents of respective components to obtain a casting molten steel; step S2, continuous casting: crystallizing the casting molten steel with an electric pulse, followed by solidification to obtain a continuous casting billet; step S3, rolling: subjecting the continuous casting billet to rough rolling and finish rolling sequentially to obtain a finish-rolled billet; and step S4, post-rolling treatment: slowly cooling and then air-cooling the finish-rolled billet to obtain the fatigue-resistant load-bearing steel.