In addition, the market size of domestic wind power generation also has a very large space for development, and with the stability of sea wind resources and the characteristics of large power generation, as the cheapest kind of renewable resource power generation, wind power generation is destined to have a very large market size.

This year, the Power Equipment Research Institute of Nanao Group Co., Ltd. has carried out technical cooperation in Huayuan Group Co., Ltd., Huaxing Group Co., Ltd., and has developed the largest 4 megawatt wind permanent magnet generator at this stage, which is also the highest power wind turbine at this stage, and Siemens Energy can only produce 3.6 megawatt wind turbines at this stage.

The design and manufacture of the wind turbine nacelle is 4 meters in diameter, after the installation of three 63 meters long wind turbine blades, the entire wind turbine impeller diameter is up to 134 meters, the sweep area can reach the size of three football fields, and it is also the largest wind turbine in the world.

The weight of the wind turbine nacelle is only 170 tons, which can be transported by truck, which is also a major advantage of the wind turbines of the Nanao Group.

Now, after a series of rigorous tests, the wind turbine will be officially sold in the spring of next year, and these wind turbines will be used in these offshore wind power projects built by Nanao Group.

Now the company has begun to apply for certification with the DnVgL classification society, as long as this organization issues type approval, fully in line with the international wind turbine standards can be put on the international market at any time.

At present, wind power equipment is basically about 900,000 euros per megawatt, but Nanao Group will not sell finished products cheaply, a set of such generator sets is quoted at 30 million, after all, Nanao Group has also invested a lot of research and development funds in this regard.

In order to develop high-power wind turbines, Nanao Group Co., Ltd. should develop fairings, rotating shafts, speed increasers, spindles, gearboxes, steering controllers, brake pads, permanent magnet generators, cooling systems, propellers, etc. in the generator host.

Among them, the bearing of the wind turbine is another core component, because it has to be stressed and moved, the bearing is easy to damage, and if the bearing needs to be replaced during operation, the hope of the wind turbine profit will be disappointed, and the design life should reach 20 years.

To meet such high design requirements, the Machine Tool Research Institute offers high-quality, highly reliable solutions for adjustably arranged single row tapered roller bearings.

The outer diameter of the bearing developed reaches more than one meter, which is the largest single-row tapered roller bearing provided by the domestic wind power market, and the size and number of internal rolling elements are maximized, which greatly improves the bearing capacity.

In addition, considering the offshore environment, the bearing is also equipped with a special high-temperature, friction-resistant and high-hardness coating, which can provide additional protection for the bearing, effectively avoid damage caused by roller slippage, and thus extend the service life.

In addition, the Machine Tool Research Institute also provides high-performance grease, which further extends the service life of the bearings.

In order to ensure the stable operation of the fan, the bearing factory under the Machine Tool Research Institute has always adhered to the high quality standard of zero defects, through the use of various technologies and means to improve the quality of the bearing and reduce the safety risk in the use process, the highest standards of the wind power industry are used in the production process of this bearing, and is committed to ensuring the high quality and reliability of the bearing to the greatest extent, and improving the traceability of the bearing.

At the same time, 100% grinding burn inspection and ultrasonic inspection are used to reduce the possibility of internal defects in the product.

The other precision components of the host are the most precise and high-end components designed by Huaxing Group Company in accordance with the design of Nanao Group, and even exceed the design indicators.

This is mainly due to the fact that Huaxing Group has a very strict set of standards within itself, and it is common for many components to accidentally exceed the design indicators.

It is no wonder that Huaxing Group is involved in the manufacture of aero engines and lithography machines and rockets and satellites, and the company has a large number of ultra-precision processing equipment and a large number of senior technicians, and the components made are naturally extremely stable and reliable.

Considering that the wind turbine is in such an environment at sea, the main engine shell is also made of corrosion-resistant steel, laser cutting equipment is used, and the highest sensitivity ultrasonic tester and X-ray flaw detection equipment are used when welding, and all welds need to be inspected to ensure that the main engine can support the wind turbine in the face of various harsh environments in nature.

The blades of the blades of the wind turbine are the largest and longest blades in commercial operation in the world, and the force to be borne in its operation is also unprecedented, and to achieve the maximum strength and lightest mass, the scientists of the research institute of Nanao Group Company have also determined that epoxy resin and fiber materials are used to form FRP after countless tests.

After adding the braided resin, the thickness and weight are only a quarter of the original, but the strength has increased more than ten times.

The blades have also been tested by 5 million vibration tests, and each part is equipped with a stress sensor to test the blades in the wind tunnel to imitate the strongest force in nature.

Over the course of four months, the blade was vibrated 5 million times, equivalent to 20 years in a very harsh environment, and the internal structure of the blade was intact before the first blade was produced.

At the same time, the shape of the propeller was designed with the highest efficiency through the wind tunnel experimental data.

In order to withstand typhoons of magnitude 10 or higher, the institute has also developed a special technology for blades - aeroelastic blades.

After encountering a typhoon, when the wind blows, the blades can produce a certain degree of deflection and shaking like a reed, so as to reduce the direct impact force of the strong wind on the blades, without directly breaking the blades.

In addition, in order to obtain higher power generation efficiency, the institute also uses the pitch technology developed by Ruisheng Technology Company, which can adjust the angle of the blades and change the windward area of the blades according to the size of the wind speed, so as to obtain higher power generation efficiency, and at the same time, the wind turbine can also rotate and always align the head of the turbine with the windhead.

At the same time, the wind turbine unit also uses lightning protection technology, after all, the offshore wind turbine is basically the highest point in the nearby sea, and the possibility of being struck by lightning is also the greatest.

For example, 72 wind turbines in an offshore wind farm in Denmark have been struck by 310 lightning strikes over a period of seven years, so a reliable lightning protection system is also essential.

There is a speed-increasing machine in this wind turbine, which only needs to have a breeze with a speed of three meters per second, and the speed-increasing machine will increase the speed of rotation, and the wind turbine can start to generate electricity, and when the wind speed is too fast, generally when the wind speed is greater than 25 meters per second, the wind turbine will turn on the protection mode, it will stop running, and the blades will also become slurry to reduce wind resistance.

The wind turbine developed by Nanao Group Company uses the technology accumulation accumulated by Huaxing Group for so many years, which can be described as a masterpiece.

The company also regards this wind turbine as a killer weapon, preparing to enter the wind turbine market at home and abroad.

To this end, Nanao Group has also ordered a complete set of marine operation ships such as submarine cable laying ships and crane ships, and has also established two wind turbines in the open sea of Xuejiadao, and built a substation on Xuejiadao Island to supply power to Xuejiadao, which is also a demonstration project.