The fan comprises a fan, turbine blower, blower and compressor, divided in detail including centrifugal compressor, axial compressor, centrifugal blower, roots blower, centrifugal fan, axial fan and Yales blower 7 categories. The development trend and direction of the future fan are as follows:
The prediction for the use of a wide range of small and medium sized fan fan from the demand characteristics, product structure and manufacturing process is relatively simple, the cost is relatively low, the main user is the pursuit of high efficiency, low noise, long life, and the price is cheap. The other is a capital and technology intensive products, complex structure, long manufacturing cycle, complete and systematic is also strong, but running in high pressure, high temperature and high speed conditions, some even in the harsh conditions of operation, users have different requirements on the fan. For turbo blowers and compressors and large fans, users mainly aim at high quality, high reliability, stable operation and long cycle.
From the main areas of demand structure prediction, general ventilation fan (generally for medium and small centrifugal and axial fan) the most widely used, the largest demand, manufacturers are also the most. Generally speaking, the supply of such products exceeds the demand. Special purpose fan (including anti-corrosion fan, high temperature fan, wear-resistant fan, exhaust fan fire etc.) demand is not great, but because of special operation conditions, need to be treated differently, because the main material is special. The biggest feature of Roots blower is that when the pressure is within the allowable range, the flow rate varies little, the pressure selection range is wide, and the forced gas transmission characteristics are the main disadvantages. In recent years, through the introduction of technology, joint ventures and self-developed, our country has introduced a three blade roots blower with low noise, which is popular with users and has a better market prospect. Turbine compressor (including centrifugal compressor, axial compressor and axial centrifugal compressor) is an important equipment of the whole set of major projects, and plays an important role in the national economy. The performance requirements of turbo compressor are both high pressure and large flow. With the large-scale installation of equipment, the parameters of turbo compressor are becoming higher and higher. Such as blast furnace smelting plant, large coal chemical plant, large chemical fertilizer plant, large ethylene plant, large air separation unit, natural gas pipeline conveying device and oil field gas injection device, etc.. The demand for such products is small, but due to the importance, complex structure, long manufacturing cycle and high technical content, there are good economic and social benefits. The manufacturing level of turbo compressor represents the whole level of the fan industry. The capacity forecast from the domestic market varies greatly according to the requirements of different pressures and flow rates. Therefore, the fan demand should be differentiated according to its type and size, and forecast according to the demand of different industries. According to incomplete statistics, the annual growth rate of fan production in China was from 1980 to 1996, with an average annual growth rate of 13.8%. It is estimated that the total output of China's fans will be between 2 million 600 thousand and 2 million 900 thousand units in 2005, and that it will reach 3 million 100 thousand to 3 million 250 thousand units in 2010. According to the fan industry statistics, prediction of centrifugal compressor output in 2005 was 1 million 600 thousand ~ 1 million 800 thousand, 2010 will reach 2 million to 2 million 100 thousand; 2005 axial compressor production was 260 thousand units in 2010 is expected to reach 360 thousand units; turbine compressor and blower in 2005 the market share of up to 70% the left and right.
From the foreign market forecast, China general machinery fan industry association member unit 2000 export fan 7969, export delivery value is 81 million 157 thousand yuan. From 1991 to 2000, the total number of exported fans was 72876 units, and the total value of exported goods was 747 million 260 thousand yuan.
At present, the trend of global economic integration is becoming more and more obvious, and the economy of all countries will depend on each other more closely. International economic cooperation and exchanges are becoming increasingly close, and the international market is in a period of great cross and integration. At the same time, the global industrial restructuring is accelerating the pace of international division of labor, the scale and depth have significant progress, the developed countries will continue to industrial production to capital intensive and technology intensive industries and labor-intensive products transfer to developing countries and regions. This provides a good opportunity for China to play its own advantages and enter the international market.
In 1970s, foreign advanced technology of centrifugal compressor was introduced in China. After digestion, absorption and innovation, the product quality was improved. As long as the quality and delivery time are guaranteed, the use of price advantage is internationally competitive. Especially after China's accession to the WTO, it is possible to increase the export of fans. From the historical analysis, the main export varieties are small and medium-sized fan and fan parts. Domestic producers of such fans, the main gap is that the surface quality can not meet the export requirements, if improving the quality of appearance, but also has a price advantage, the prospects in foreign markets is broad. From 1991 to 2000, the fan export situation shows that the export of small and medium-sized ventilators is not stable enough, and there is no obvious trend of growth. But as technology continues to improve, such wind turbines are expected to increase in volume and are projected to grow at an average annual rate of about 5% on 2000.
There was a marked increase in exports of centrifugal compressors and blowers from 1991 to 2000, reaching 87 units in 2000. The major exporters are India, Pakistan, Iran, Vietnam and other developing countries. This trend is expected to grow, reaching 100 units a year.
To sum up, in the next few years, the market of wind turbines will be greatly developed, and the domestic market demand of small and medium fans will increase correspondingly, but the overall supply exceeds demand. In macroeconomic regulation and control, the state should introduce appropriate economic policies to limit the further development of such enterprises, and encourage the expansion of exports and the development of foreign markets. For turbine compressor, domestic only Shenyang air blower factory, Shaanxi blower (Group) Co., Ltd., Shanghai Blower Factory Co. Ltd., Chongqing GM (Group) Co. Ltd. a few companies are able to produce, the current domestic market share of only 50%. Therefore, for such products, the state can not only limit its development, but also support the macro-control, and encourage users to use domestic equipment. At the same time, the export of such equipment should also be given corresponding support.