Analysis of Stress and Efficiency of Vertical Axis Wind Turbine

Although thermal power generation is the main form of our country's power generation industry, thermal power generation consumes a lot of energy and has serious pollution. It does not meet the national strategy of saving society and energy for sustainable development. Therefore, wind power generation has received more and more attention and favor.

In recent years, China has vigorously developed wind power generation, making it an army in the power industry in China. It is not only the need for energy development, but also the need for environmental protection. The positive impact of wind power on the environment is self-evident. It not only protects the atmosphere we live on, reduces pollution, but also protects our land from overexploitation. The most valuable is the wind environment. The negative impact is very limited, which can enable humans to live in harmony with the natural world and truly realize the goal of sustainable development on the earth. Wind power includes mechanical structure and real-time monitoring. In the 50 kw wind power system, the maximum diameter of the impeller is 9 m, and the height of the impeller is 19.2 m. Impeller weight is 4.2 t. In a 1.5 MW wind power system, the maximum diameter of the impeller is 58 m, the height of the impeller is 116 m, and the weight of the impeller is 120 t. Due to difficult loading and unloading and high maintenance costs, the entire wind power generation system will collapse once it is damaged. Therefore, it is particularly important to analyze and monitor the entire axle and blade. The 50-kw double-shaft vertical-axis wind turbine rotates around the vertical axis of the wind turbine, and the captured wind energy is transmitted to the ground gearbox and generator set through the vertical spindle.

Compared with horizontal axis fans, vertical axis fans have greater advantages in terms of manufacturing, installation, maintenance and fatigue resistance. This wind turbine is now installed in Huade County, Wulanchabu, Inner Mongolia. This type of vertical axis wind turbine is the first one in China and is currently in the research and development stage. It has not been invested in mass production. Based on this, this paper focuses on the vertical axis wind power generation system and analyzes its performance and efficiency through the collected test data.

The existing wind power generation systems are mostly horizontal axes, which are limited by the wind direction. Although the efficiency of the horizontal axis is higher than that of the vertical axis in the windward direction, the efficiency of the horizontal axis fan will be reduced after the wind direction changes. Therefore, from a horizontal axis wind farm, it can be found that the horizontal axis of the leeward wind turbine is not working, the wind horizontal axis generator set works, and the horizontal axis generators are installed at the top, increasing the length of the cable. And maintenance costs.