The cause and the solution - the centrifugal fan bearing oil bearing knowledge

Centrifugal fan is depending on the input mechanical energy, improve the pressure side by side to send gas machinery. This machinery widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings such as ventilation, dust and cooling. Then, the centrifugal fan in the process of operation, what causes of oil bearing happen? The cause and the solution in the centrifugal fan bearing oil fan impeller side bearing in the process of application, there has been serious leakage of the shaft sealing is not only caused serious waste lubricating oil pollution equipment and ground; The low oil level operation of the blower bearing often, safe operation of the blower; Operators of fill oil, increased operating personnel workload. In order to solve the problem of oil leakage, technicians have come up with a variety of way, but didn't get the ideal effect. Many improvements, the study found that the main cause of the oil spill: one is: between lateral bearing seat and the impeller impeller fan runtime for positive pressure area, the wind will be from the chassis and axle housing external aperture brought out into the bearing chamber will lubricating oil, the second is: the fan impeller side bearing design flaws exist between the impeller and shaft sleeve, long running will appear loose phenomenon, shaft sleeve and the shaft collision and friction cause excessive clearance fit, the wind gap into the bearing chamber will be brought out lube oil, speeds up the leakage. Found after the leakage source, USES the bearing sleeve internal note glue external diversion of technology, solved the oil leakage problem completely. Centrifugal fan bearing analysis of the causes and solutions for centrifugal fan bearing oil leakage problem, by adding a set of negative pressure device application is modified to eliminate the oil bearing. Negative pressure pumping unit will oil suction blower inlet duct, is solves the blowers and ground bearing lubricating oil spill pollution problem, but the oil is pumped into the blower, lubricating oil deposited within the blower casing pollution caused blower impeller, lubricating oil consumption increased, oil more frequently. By improving the labyrinth seal and seal installation vent cap, mounted to the chassis felt, although has obtained the certain effect, but not fundamentally solve the problem of oil leakage. After long time observation, it can be found after the oil hole on the bearing cap unscrewing strong air from escaping from the bearing seat, air pressure, within the bearing lubricating oil with stronger air flow, with the oil can ( Don't have to funnel) To bearing in filling oil, oil by air to blow the inverted parabolic. Analysis: under normal circumstances bearing high speed rotation, the wind from the chassis and axle housing external gap into the bearing chamber, because the bearing end cover, the labyrinth seal block cavity for micro positive pressure, is a result of forced air blower in high-pressure wind through the shaft sleeve and clearance between the impeller, shaft and bearing inner ring into the bearing seat. Shaft sleeve of bearing inner ring and fan impeller axial positioning effect, shaft sleeve and the shaft for the clearance fit. After long time running loose sleeves, tapping on shaft sleeve with the positioning screw to a fixed shaft sleeve, a short time, the effect is very good, but run loose axle sleeve will still be less than a month. Analysis technology to solve the loose must have solid filler to fit clearance, to solve the oil must eliminate centrifugal fan to bearing the wind problems, then puts forward with high-pressure injecting into the collar with axial clearance between injecting solve loose sleeves up wind, shaft sleeve outer ring and guide ring of method to eliminate bearing oil change the direction of the wind.