Self-priming centrifugal pump structure what?

Our general structure of self-priming centrifugal pump is composed of six parts are the impeller, pump body, pump shaft, bearings, seal rings, stuffing box. 1, the impeller is the core part of the centrifugal pump, it is relatively high speed output, the impeller blades play a major role in impeller before the assembly through the static balance experiment. The inner and outer surfaces of the impeller require smoothness to reduce the frictional loss of water flow. 2, also known as the pump casing, it is self-priming centrifugal pump body. To support the role of fixed, and with the bearing bracket to connect. 3, the role of the pump shaft is connected by a coupling and motor, the motor torque to the impeller, so it is the main component of mechanical energy transfer. 4, the bearing is set on the pump shaft supporting the pump shaft components, there are two types of rolling bearings and plain bearings. Rolling bearing the use of butter as a lubricant to the appropriate general 2/3 to 3/4 of the volume too much will heat, too few have a sound and heat! Sliding bearings are used as a transparent oil lubricants, refueling to the oil level line. Too much oil to bleed along the pump shaft and humble, too little bearing but also overheating and burn accident! In the process of self-priming pump bearing temperature up to 85 degrees generally run at 60 degrees, if it is high Find out the reason (whether there are impurities, whether the black oil, whether water) and timely treatment! 5, seal ring, also known as the leak ring. The gap between the impeller inlet and the pump casing is too large, causing the water in the high-pressure area of ​​the pump to flow to the low-pressure area through the gap, affecting the water output of the pump and reducing the efficiency. If the clearance is too small, friction between the impeller and the pump casing will be caused to wear. In order to increase the backflow resistance to reduce internal leakage, delay the service life of the impeller and the pump housing, the inner edge of the pump housing and the impeller is provided with a sealing ring at the joint of the outer support, and the sealed clearance is maintained at between 0.25 and 1.10mm. 6, stuffing box mainly by the filler, water seal ring, packing tube, packing gland, water seal tube. The purpose of the stuffing box is to close the gap between the pump housing and the pump shaft so that the water inside the pump does not flow outside and the outside air does not enter the pump. Always keep the vacuum inside the pump! When the pump shaft friction with the filler to generate heat will depend on the water seal to live in the water seal to the filler cooling! Keep self-priming centrifugal pump normal operation. Therefore, in the process of centrifugal pump inspection tour of the stuffing box is a special inspection! In operation about 600 hours to replace the filler.