(2) Rolling poor assembly quality. As the inner sleeve and the shaft of the tightening force is insufficient, jacket and bearing clearance is too large or too small. (3) bearing the quality is bad. Bearing scraping poor quality, Cangzhou Francis fan, Ugyen bad contact or bodiless; Rolling Rolling decent cracks, chipping, peeling, warehouses Francis fan, would undermine the stability and uniformity of the film, the surface of the bearing heat. (4) felt tight seal and fever. (5) bearing excessive vibration and to withstand shock loads, residential Francis fan, seriously affect the stability of the lubricant film. (6) bearing cooling water shortage or disruption, the impact of the heat out, leaving the bearing temperature. Structure fans: fans are impeller, casing, inlet header converter, muffler, baffles, motor and other components. Meridian impeller has accelerated features twisted wing blade welded to the hub, metallurgy Francis fan, the balancing check, speed test, a good aerodynamic performance. The housing is made cylindrical, and mute function of the concentrator is coupled into a whole. Outlet is equipped with deflector, has a good flow distribution, pressure is stable. Cangzhou Francis fan | l Swiss Electromechanical | corrosion Francis fan ventilation and air conditioning provided by the liter Swiss mechanical and electrical equipment factory. Cangzhou Francis fan | l Swiss Electromechanical | corrosion Francis fan is Swiss liter Ventilation and Air Conditioning Electrical Equipment Factory (www.dzsrxfkt.com) this year introduced a new upgrade, the above picture is for reference only, please call the telephone or pictures on this page, For the latest information, contact: province.