With the continuous development of science and technology, people have higher and higher requirements for the use of fans. As far as the current development trend of foreign fan technology is concerned, the development of fan capacity will continue to increase, high efficiency, high-speed miniaturization and low noise. .

---The capacity of large fans continues to increase. With the large scale of various industrial installations, the required capacity of various types of fans is also increasing. Large-scale fans will increase in the market in the next few years.

---High efficiency. In order to improve efficiency, ternary flow impellers have been more and more widely used in fans. The development of other special purpose fans such as diagonal flow fans will be more marketable.

---High-speed miniaturization. After all kinds of fans adopt ternary flow impeller, the pressure can also be increased while improving the efficiency. Therefore, under the same conditions, the outer diameter of the impeller can be reduced by 10% to 30%, so that the obvious effect of reducing the volume and reducing the weight is achieved. Increasing the speed is also one of the important ways to miniaturize the fan.

---Low noise. Fan noise is one of the main sources of noise pollution in industrial production. The large-scale and high-speed fan make the noise problem more prominent. For low-frequency noise, the fan mainly reduces the noise of the fan by improving the structural design of the fan. If the requirements are not met, measures such as installing a muffler can be adopted.

In summary, these technologies are not only the future development trend of foreign wind turbines, but also the technical endeavors of the domestic wind turbine industry.