G, Y4-73 centrifugal-Fan-Fan GY4-73 Centrifugal series products in 1982 were all fan industry jointly designed for power plant 230t / h steam boiler below the pass, supporting the use of the wind. In no other special requirements, G4-68 type can be used for mine ventilation and general ventilation. Two types of fans are the advantages of high efficiency, low noise, high strength. Fan transmission medium is air, the maximum temperature does not exceed 80 ℃. Medium induced draft fan for conveying gas, the maximum temperature should not exceed 250 ℃. Before the induced draft fan, you must install the collection efficiency of not less than 85% of the dust removal device to reduce the dust content of flue gas into the fan in order to facilitate the increased use of the life of the fan. Fan and induced draft fan are single suction intake, there are a total of seven machines №8,9,10,11,11.2,12.5,14,16 number. Each fan can be made of the right-handed and left-rotation of two types. A front end of the fan from the motor, the impeller rotates clockwise, called right-hand fan, to the "right" indicates; counterclockwise rotation of the impeller is called L-blower to the "left". Export position of the fan outlet angle to the cabinet said, "right", "left" fan can be made of 0 °, 45 °, 90 °, 135 °, 180 °, 225 ° total of six angles. Fans of both D-type transmission mode, the motor and fan connection with flexible coupling Direct drive. Both fan mainly by the impeller, housing, air inlet, adjust the doors and transmission groups. Impeller: from 12 backward wing blade welding arc cone in the middle of the plate wheel cover roulette. Induced draft fan impeller blade head with a solid body and wear resistant materials increase surfacing department to improve the life of the blade. Impellers have been static and dynamic balance test, to ensure smooth operation. Chassis: The chassis is welded steel with ordinary snail shape. Single suction fan casing made of two different forms: №8 ~ 12.5 casing made integral structure. Fourth №14,16 chassis can be removed. For the fan, the snail-shaped plate side door opened ash, while properly thickened to prevent soot wear and prolong life. Inlet: for convergent streamlined overall structure, bolted to the inlet side of the housing. Adjust the door: device used to adjust the size of the fan flow. №8 ~ 12.5 by 13 blades consisting of flowers identified are axially mounted in front of the air intake, the use of an external drive structure, flexible rotation. Adjustment range from 90 ° (fully closed) to 0 ° (fully open). Adjust the position of the door pull from the air inlet direction, on the right. For the right-hand fan, pull the push from the bottom up is fully closed to fully open direction. For L fan, pull on the pull down from fully closed to fully open by the direction. In order to adjust the door all parts work properly, must be well lubricated. Adjust the door on the fan, using calcium sodium grease lubrication. For Fan, due to higher gas temperature, high temperature grease using molybdenum disulfide (260 ℃) grease lubrication ensures operation at high temperatures. Transmission Group: Transmission are D-type. From the spindle, bearing housing, couplings and other components. Spindle is made of high quality steel. Uses rolling water-cooled bearing housing overall. Therefore, the need to install water pipes, water consumption due to different ambient temperature varies, generally by 0.5 ~ 1 m3 / h to consider. Equipped with a thermometer and oil level indicator on the bearing housing. Oil uses the 30th machinery oil, into the oil by the oil level marking requirements.