The tower structure used by the wind turbine will not swing much even in strong winds (personally, the maximum amplitude is less than 5cm, and this includes the situation where the wind turbine is quickly lifted in strong winds) . strong winds and other bad weather are not allowed to enter the unit and use the elevator.
First of all: according to my colleagues' analysis and calculation, polygons allow Save more material by using the same resistance. It can also be said that polygons have greater strength when using the same materials. However, the former does not save much material and the strength of the latter does not increase much. In fact, it can also be seen that except for the lattice type (which is relatively rare now) and the mast type of small wind turbines, the towers of traditional large wind turbines are all spinal tubular. In addition, domestic production of towers for the spinal canal is relatively mature.
Then, the tower height of large wind turbines (1 to 3 MW) is generally (60 to 90 meters) and is generally composed of 2 to 3 sections of conical tubular steel towers (85 meters should be 3 sections). ). Each layer is connected by high-strength bolts in the form of internal flanges. Each tower section is welded from multiple tapered sections with different wall thicknesses based on strength analysis, modal analysis and actual conditions. Each flange is generally forged in one piece, the entire welding of the tower is very strict (the standards I am talking about must comply with DIN****), and almost all welds require flaw detection.
In addition, usually each section of the tower of a large wind turbine is not shaped like a spiral, but each small section is unrolled separately.
The 2MW unit including the assemblymble of the unit has just been completed. I've helped replay most of the rounds, but there's still a lot to learn and expand on. As for the analysis mentioned above, one of my colleagues calculated it specifically, but I don't know if it is accurate or not, because I didn't think about it and didn't calculate it myself- same, but I just reviewed the dimensions.
That's all. I wish you good luck.
In addition, the price comparison between polygons and spinal canals is also relative. For example, if I am looking for a manufacturer to make lathes in Shenyang area, if the quantity is small, I may not be suitable. If I can go to a professional wind tower production site, while nearby manufacturers specialize in manufacturing polygonal steel towers (such as those used in the electrical industry although they also supply conical towerss), then the polygonal towers I bought elsewhere are cheaper than the polygonal towers I bought elsewhere. conical tubular towers. The difference is around 8,000 per ton and over 10,000 per ton.