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| No.8703684
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Information Name: | Xiamen fan Xiamen cooling fan Xiamen FRP fan offer Inquiries Cytech |
Published: | 2012-04-06 |
Validity: | 90 |
Specifications: | 88 |
Quantity: | 0.00 |
Price Description: | |
Detailed Product Description: | Xiamen Cytech ventilation equipment cooling fan Xiamen fan Xiamen Xiamen FRP fan offer Inquiries] Chun Longfengshan machine history Fan has a long history. BC for many years had been to create a simple wooden Husker windmill, its principle and the centrifugal fan is basically the same. In 1862, the British Kyu Bell invented the centrifugal fan, impeller, casing for the concentric type chassis used brick, wood impeller, straight blade, the efficiency is only about 40%, mainly for mine ventilation. 1880, design for mine row air volute casing, and backward curved blade centrifugal fan, the structure has been perfected. 1892 French for the development of cross-flow fan; 1898, the Irish design a forward blade the Xi Luoke type centrifugal fan, and widely used in various countries; the 19th century, axial fans used in mine ventilation and metallurgical industries blast a pressure of only 100 to 300 Pa, only 15 to 25 percent efficiency, rapid development until the 1940s. In 1935, Germany, first using axial flow air compressor, boiler ventilation and induced draft fan; 1948, Denmark made the operation of the variable pitch axial fan; rotating axial flow fan, Meridian accelerated axial fan, mixed flow fan and The cross flow fan development. Edit this paragraph, classification of wind turbines A fan by the use of the material classification can be divided into several, such as a the Hulled fan (fan), FRP fan, plastic fan, aluminum fan, stainless steel fan blower classification by the gas flow direction, is divided into centrifugal axial, diagonal flow (Francis) and cross-flow type. The fan according to the flow direction of the airflow into the impeller is divided into: axial fan, centrifugal fan and fan of oblique flow (Francis). 4 fan use is divided into pressed into the local fan (hereinafter referred to as pressed into the fan), and explosion-proof electric motors placed in the flow channel outside or placed in explosion-proof sealed chamber out of local fans in the flow channel, explosion-proof motor (hereinafter referred to as extract fan). The fan can also be in accordance with the form of pressurized single-stage, two-stage or multi-stage pressure fan. Such as 4-72 is a single-stage pressure, high refine the machine is a multi-stage pressure fan blower in accordance with the end use can be divided into: axial fans, mixed flow fan, roof fan, air conditioning fans. Fan Fan pressure can be divided into low-pressure blower, air compressor, high pressure air fan performance parameters of the fan performance parameters, flow, pressure, power, efficiency and speed. In addition, the size of the noise and vibration is also a major fan design specifications. The air volume flow, also known as the volume of gas flowing through the fan unit time; pressure, also known as air pressure is the gas pressure within the fan static pressure, dynamic pressure and total pressure; power fan the input power shaft power. Fan effective power and shaft power is called the efficiency. Efficiency of the fan total pressure of up to 90%. Edit this paragraph, the energy-saving |
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Copyright © GuangDong ICP No. 10089450, Environmental protection ventilation and cooling Xiamen Engineering Co., Ltd. All rights reserved.
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You are the 25601 visitor
Copyright © GuangDong ICP No. 10089450, Environmental protection ventilation and cooling Xiamen Engineering Co., Ltd. All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
AllSources Network's Disclaimer: The legitimacy of the enterprise information does not undertake any guarantee responsibility