The Solution of Leakage of Mixing flow Pump Sleeve

The Solution of Leakage of Mixing Pump Sleeve
Mixed flow pump sleeve leakage is a difficult problem to solve. The role of the sleeve is to avoid direct wear of the pump shaft at the seal. Using sleeve and seal packing friction, both sealing and not wear the pump shaft, and can play the role of axial positioning of the impeller. As the sleeve and the shaft is used between the transition with the pump there is a certain pressure, so the sewage from the shaft sleeve and the gap between the shaft leakage out. After a period of use, wear and corrosion, water leakage is becoming more serious, and finally caused by external radiation. Sewage often flee into the bearing cavity leaving the bearing damage, and even the shaft and pump shell surface corrosion. In order to effectively control the sleeve leakage, over the years has been used to improve the accuracy between the sleeve and the shaft, with the original transition with the interference fit. But it also caused the manufacturers can not use with, can only own processing, and processing more difficult, higher scrap rate. The sleeve material is gray cast iron, the assembly need to be forced, because the contact surface is longer, often broken, overhaul time to replace a sleeve, and sometimes damage the shaft and bearings, resulting in increased maintenance costs, costs Increased. Jiangsu Huaihai farm to completely solve the problem of mixed flow pump, the sleeve was improved. Method is: the original transition in the sleeve with a stuffing box inside, and with a packing ring, the first installation of the packing ring set in the corresponding journal, wrapped around the journal on the dry asbestos oil Rope, and then will be processed with a packing letter of the bushing mixed flow pump impeller sleeve packing seal