Introduction to the structure of centrifugal sewage pump

May 21, 2019

Introduction to the structure of centrifugal sewage pump


The basic structure of the centrifugal sewage pump is composed of six parts: impeller, pump body, pump shaft, bearing, sealing ring, and packing box.
1. The impeller is the core part of the centrifugal pump. Its high speed is high, and the blades on the impeller play a major role. Therefore, the impeller must pass the static balance test before assembly. In addition, 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 the pump casing. It is the main body of the pump. It acts as a support and is attached to the bracket on which the bearing is mounted.
3. The function of the pump shaft is to connect the coupling to the motor and transmit the motor's torque to the impeller, so it is the main component that transmits mechanical energy.
4. The bearing is a member that supports the pump shaft on the pump shaft and has two kinds of rotating bearings and sliding bearings. Rotating bearings use butter as a lubricant to refuel properly. Generally, the volume of 2/3-3/4 is too much to heat up, too little, and there is noise and heat! The sliding bearing is made of transparent oil as a lubricant, refueling to Oil level line. Too much oil will ooze along the pump shaft and float, too few bearings will overheat and burn out. The temperature of the bearing is up to 85 degrees during the operation of the pump. Generally, it is about 60 degrees. If it is high, it is necessary to find the cause. (Is there any impurities, whether the oil is black or not, whether it is in the water) and deal with it in time!
5, the seal ring is also known as the leak reduction ring. The excessive gap between the impeller inlet and the pump casing causes the water in the high-pressure zone of the pump to flow to the low-pressure zone through the gap, which affects the water output of the pump and reduces the efficiency. If the clearance is too small, the impeller and the pump casing may cause friction and wear. To increase the backflow resistance and reduce the internal leakage, and delay the service life of the impeller and the pump casing, a sealing ring is arranged at the inner edge of the pump casing and the outer joint of the impeller, and the gap of the sealing is preferably maintained between 0.25-1.10 mm.
6. The packing box is mainly composed of packing, water sealing ring, packing tube, packing gland, and water sealing tube. The function of the packing box is mainly to close the gap between the pump casing and the pump shaft so that the water in the pump does not flow to the outside and the outside air does not enter the pump. Always keep the vacuum inside the pump! When the pump shaft and the packing friction generate heat, the water should be sealed by the water seal pipe to the water seal ring to cool the packing! Keep the water pump running normally. Therefore, the inspection of the packing box during the running inspection of the pump is essential! You should replace the packing after about 600 hours of operation.



Fuan Zhongzhi Pump Co., Ltd


registered the trademark "ZOZHI."


Add:No.155 Shangcun Qinxiyang Industry Zone,Fuan city,Fujian,China

Tel:+86 0593 6532656 Fax: +86 0593 6531158

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