reSee.it Video Transcript AI Summary
The process begins with forming a circular base for the wind turbine tower using concrete. After the cement cures, a series of intersecting pipes is installed with screws, and reinforcement bars are laid around these pipes to create a larger circular plate. The base is sealed with a lid, and concrete is poured inside. Holes several meters deep are drilled into the pipes, and excess pipe material is ground off. A high-strength metal disc is fitted over the holes, followed by the injection of composite resin material through the holes with a high-pressure pump. A steel rod is then inserted into each hole, and the underground rods’ intersecting angles lock into the rock layer. Sealant fills the gaps in the metal disc, which are then locked with screws, and the bolts on the disc are reserved for mounting the tower. For bases supporting turbines over five megawatts, the base must be deeper and larger. The ground is leveled using a grouting machine, and a three-meter-high central base is installed to act as a vertical support, connecting and positioning the turbine.
Reinforcement bars form a chassis that creates a conical base for the tower, requiring a larger grouting machine and thousands of tons of concrete with continuous twenty-four-hour work until solidified, typically over a month. The base is then buried with soil. A trench is dug next to the turbine base to lay cables that transmit electricity, with the other end of the cable connected to a wind turbine substation. The substation manages, transforms, transmits, and distributes the electricity generated by multiple wind turbines, ultimately connecting to the national grid. Once all is prepared, the wind turbine assembly proceeds.
Blades, typically over 40 meters long, are the most challenging to transport and require specially equipped trucks and experienced drivers. The tower is transported in sections and assembled on-site using two cranes: one uses a special hook, and the other uses steel ropes to lift and vertically flip the column. After aligning and tightening each screw, the second column is hoisted, with workers inside completing the connection and locking. The third segment, lifted to a height of 50 meters, requires the driver to use a walkie-talkie for precise alignment, and with this segment in place, the tower is complete.
Next is the nacelle, weighing over 20 tons, which is hoisted with ropes to prevent swaying. The nacelle, the heart of the wind turbine, contains the gearbox, generator, and control system. After securing the nacelle, the hub is installed, starting with the hub first and flipping it over to the vertical position. The rotating component has a fixed installation angle and is secured once the angle is perfectly aligned. Finally, the blades are installed using custom lifting tools controlled by ropes to stabilize the blades during lifting in four directions. The tension below aids the connection as the blades reach their final height. After installation, ropes are removed, and the lifting tools are gradually removed from the blades by the driver. With the last blade in place, the wind portion of the turbine is complete.