[Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - fan] fan impeller is the main component, its geometric shape, size, number of leaves and manufacture of precision have a significant impact on performance. Static balance impeller or fan balancing correction in order to ensure smooth rotation. The export orientation of different fire exhaust fan blades, impellers into forward, radial and backward three types. Front tilt toward the top of the impeller vanes of the impeller rotation direction; top blade radial impeller is in the radial direction, is divided straight blade and curved blade; after rotating reverse tilt toward the top of the impeller vanes of the impeller. The maximum pressure in the flow and the number of revolutions constant forward impeller, the required minimum roof fan impeller diameter, but the efficiency is generally low; pressure after the impeller contrary, the resulting minimum, the required maximum impeller diameter, while the efficiency of the general high; radial impeller in between. Vane-type lines straight blade simplest and most complex airfoil blades. In order to have the right blade surface velocity distribution, generally using curved blades, such as blades, such as the thickness of the arc. Impeller cover discs usually have to increase the strength of the impeller and reduce gas leakage between the blade and the casing. Coupling the blade with the cover plate by welding or riveting. Lighter weight impeller welding, smooth flow. Low, medium small centrifugal fan impeller is also made of aluminum alloy casting. When the axial fan work, power machine driven impeller rotating in a cylindrical housing, gas enters from the current collector, the energy obtained through the impeller, increasing the pressure and speed, and then is discharged in the axial direction. Arrangement of the axial fan has a vertical, horizontal and inclined three wind chassis, small impeller diameter is only about 100 mm fan, large up to 20 meters. [Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - mixed flow fan], also known as Francis fan oblique flow fan, in this type of fan, the gas in the direction of the axis at an angle into the impeller, gain energy in the leaf tract and out along the tilt direction. The shape of the impeller and the fan casing is conical. This fan of both centrifugal and axial flow characteristics, flow range and efficiency are somewhere in between. Roof Fan | Tianjin fans | Tianjin Jinzhong Ji fan factory direct purification by HVAC Equipment Co., Ltd. Tianjin Jinzhong Ji. Tianjin Jinzhong Ji HVAC purification equipment Limited (www.Jzjnt.com) strong, credible, in Tianjin fans, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the group into the brilliant and you work for a better future!