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Fan energy-saving promising development of efficient products is the key

Release date:2015-11-25 00:00 Source:http://www.zqlcfj.com Views:

  Fan energy-saving promising development of efficient products, according to the statistical data is the key for the national fan products with electricity consumption accounts for about 10% of the total national power. Among them, the metal mines to use the fan power consumption accounted for 30% of the national mining total electricity; The use of iron and steel industry fan power consumption accounted for 20% of the total electricity production; Coal industry use fan power consumption accounted for 17% of total electricity the national coal industry. For the fan industry, therefore, how to produce more fan of energy saving, environmental protection products, is a need to attach great importance to the problem. The personage inside course of study thinks, energy saving and environmental protection is the eternal theme of fan industry development. So, what fan production enterprise where to begin?

  Concerned expert thinks, research and development of energy-saving fan products, from product design to start, will start from the running of the fan.

  First, in terms of design, through the scientific research achievements of application of impeller and volute component, and further improve the manufacturing accuracy, makes every effort to make all kinds of fan efficiency increased by 5% ~ 10% on average. At present, the most advanced centrifugal fan with three dimensional flow impeller, the highest efficiency can reach above 87%; High efficiency of axial flow fan, the highest efficiency is 92%.

  Shenyang blower institute in 1992, for example, is developed for low pressure centrifugal fan in the renewal of 4 4-74-71, three dimensional flow impeller centrifugal fan is high efficiency and energy saving new product, its efficiency is 4% higher than that of the same type of old fan, average each fan festival power of about 2000 kilowatts per hour. But because of the fan using three dimensional flow blade manufacturing process more troublesome, manufacturing costs higher than ordinary blade fan, plus the product technology transfer fee is high, make the whole typhoon mechanism for this increase, the user can't afford to, also can't in all the comprehensive promotion of the industry.

  Secondly, using the imported technology to develop high efficiency and energy saving fan. For example, Shanghai blower factory co., ltd. and shenyang blower (group) co., LTD., respectively introduced Germany TLT and Danish arts companies moving blade adjustable axial flow ventilator technology; Chengdu power machinery factory and shenyang blower (group) co., LTD., has introduced the German KKK static blade adjustable axial flow ventilator technology; Wuhan blower co., LTD., the introduction of Japan's mitsubishi heavy industries moving blade adjustable axial flow ventilator technology; Guangzhou air blower factory introduced Denmark's ventilation nordisk company of axial and centrifugal fan technology; Chongqing general (group) co., LTD and siping jinfeng co., LTD., has introduced the British had high temperature fan technology; Shijiazhuang air blower factory co., LTD has introduced the Japanese Ren original centrifugal fan manufacturing technology of the company. Through the introduction of technology, effectively promoted the development of energy-saving fan products. During the period of "11th five-year plan", still should according to the demand of the market, appropriate introduction of wind turbine technology and special-purpose fan, fill the domestic blank.

  In addition, the fan energy saving products or not, adjust the speed change mechanism, change the operation condition is very important. At present, most of the fan variable speed institutions relatively backward, individual products adopt traditional v-belt, worm gear pair as speed regulating device, mostly using the damper adjustment. For these reasons, although some fan in high efficiency (above 86%), but the assembly efficiency is not high, some even as low as 30%. With hydraulic coupler and the application of frequency converter in the fan, greatly improving the efficiency of the fan, but the application of the number of extremely limited.

  During the period of "11th five-year plan", meanwhile, still should vigorously promote the development of energy-saving blower work, abroad in this aspect have been ahead. Such as Japan of volute and impeller flow of the shape of the part made appropriate improvements, effectively prevent the formation of the eddy and flow separation, the adiabatic efficiency by 5% ~ 10% higher than that of the original centrifugal blower; Swiss made big flow centrifugal blower, each level has device inlet guide vane, the polytropic efficiency by 82%; Multistage centrifugal blower made in Japan, imported guide Ye Lianxu automatic adjustment, energy-saving rate of 20%; High-speed single-stage centrifugal blower adopting high speed, high pressure than half open radial three yuan impeller, its efficiency can be increased by 10%; And at the other end of the blower spindle is equipped with exhaust gas turbine plant, not only conforms to the requirements of environmental protection, and achieve the energy-saving purposes. Roots blower has used the three-blade roots blower, both energy saving and reduce the noise.

  In regard to the development of centrifugal compressor should be used more three dimensional flow impeller, the impeller efficiency increased by 2% ~ 5% on average. Such as the United States to develop the natural gas pipeline three big flow three dimensional flow of centrifugal compressor impeller, the impeller efficiency can reach 94% ~ 95%; Uniaxial multilevel centrifugal compressor in Japan also further improve the efficiency of the level, the flow of big head half open 3 d impeller adiabatic efficiency up to 94%. The regulating mode should be used more industrial steam turbine or gas turbine driving, to change the speed to achieve the goal of energy saving.

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