Structural features of the fan: Fan main impeller, housing, import manifold, muffler, baffles, motors and other components. Impeller meridian acceleration characteristics of twisted wing blades welded to the hub, the balancing check, speed test, with good aerodynamic performance. Using a cylindrical casing with silencer function is coupled into a whole set of wind. Outlet provided with baffle, having good air distribution, pressure stability. Francis fan use, maintenance, maintenance: 1, the installation should be carefully checked before installation and chassis fan whether due to shipping damage or deformation, or should be repaired; 2, check for loose bolts, before starting the fan, first check whether the prejudice within the fan duct rotating objects; 3, check the motor insulation performance is good Francis fan specifications, after turning on the power to see whether the collision and friction abnormal vibration; 4, many reasons for fan vibration generated from the lower Check the above aspects: A mixed flow impeller fan and duct with friction, and audible and vibration abnormality; B bracket foot bolts not tightened, large vibration will occur; C impeller bolts and sleeve loose; D motor bracket bolts loose impeller cause imbalance, bearing damage caused by intense vibrations. 5, at room temperature, high temperature operation found Francis fan motor model, it may be caused by the following reasons: A motor bearing damage, with the gap is small, does not meet the requirements; B shaft and bearing mounting skew, two bearing misalignment; C power supply voltage is too low to run off-phase or three-phase motors. Francis fan specifications _ _ Anhui Francis fan liter by liter Swiss Swiss Mechanical and Electrical HVAC Electrical Equipment Factory. L Rui HVAC Electrical Equipment Factory (www.dzsrxfkt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Swiss electromechanical and you work up into the brilliant, for a better future!