The basic structure of a centrifugal pump is composed of six parts: an impeller, a pump body, a pump shaft, a bearing, a seal ring, and a stuffing box.
1. The impeller is the core part of the centrifugal pump. Its rotating speed is higher and the force is higher. The blades on the impeller play a main role. The impeller must pass the static balance experiment before assembly. The inner and outer surfaces of the impeller are required to be smooth to reduce the frictional loss of water flow.
2. The pump body is also called pump casing, which is the main body of the pump. It plays the role of supporting and fixing, and is connected with the bracket where the bearing is installed.
3. The function of the pump shaft is to connect the motor with the coupling and transmit the torque of the motor to the impeller, so it is the main component to transmit mechanical energy.
4. The sliding bearing uses transparent oil as the lubricant, add oil to the oil level line. Too much oil should leak out along the pump shaft, too little bearing and overheating and burnout will cause an accident! During the operation of the pump, the temperature of the bearing does not exceed 85 degrees, and it generally runs around 60 degrees.
5. Sealing ring is also called leakage reduction ring.
6. The stuffing box is mainly composed of packing, water sealing ring, packing tube, packing gland, and water sealing tube. The purpose of the stuffing box is mainly to close the gap between the pump casing and the pump shaft, so that the water flow in the pump does not flow outside and the outside air does not enter the pump. Always keep the vacuum inside the pump! When the friction between the pump shaft and the packing generates heat, it is necessary to rely on the water seal pipe to hold the water into the water seal ring to cool the packing! Keep the pump running normally. Therefore, special attention should be paid to the inspection of the stuffing box during the tour inspection of the pump operation! The filler should be replaced after about 600 hours of operation.
