The basic structure of the pipeline centrifugal pump is composed of six parts, namely, impeller, pump body, pump shaft, bearing, seal ring, stuffing box.
Impeller
Centrifugal pump is the core part of its high output power, the impeller on the blade and play a major role in the assembly before the impeller through the static balance test. The inner and outer surfaces of the impeller are required to be smooth, so as to reduce the friction loss of the flow.
Pump body
Also known as pump shell, which is the main body of the pump. To play a supporting role, and with the installation of the bearing bracket.
Pump shaft
The function of the pump shaft is connected with the motor through the coupling, the transfer of the motor to the impeller, so it is the main component of the transfer of mechanical energy.
Bearing
Is a set of components on the pump shaft to support the pump shaft, there are two kinds of rolling bearings and sliding bearings. Rolling bearings using butter as a lubricant, to be appropriate, generally 3/4 ~ 2/3 of the volume: too much heat, too few sound and fever! Sliding bearing is used for transparent lubricant oil, fuel to the oil level line. Too much oil to be leaking along the shaft and low drift, too little overheated bearings burned to the accident! Bearing in the pump during operation the maximum temperature of 85 degrees in the general run of about 60 degrees, if we should find the reasons (whether there are impurities, oil is black, is water) and timely treatment!
Seal ring
Minus leakage ring. The gap between the impeller and the pump shell will cause the pump within the high pressure zone of the water flow through the gap area of low pressure water pump efficiency and reduce the influence! Clearance is too small will cause the impeller and pump shell friction wear. In order to increase the return to reduce the internal leakage resistance and service life of the delay of the impeller and pump casing, junction with sealing ring in the pump casing and impeller aid, sealing gap should be between 0.25 ~ 1.10mm.
Stuffing box
Mainly by the packing, seal ring, tube filler, filler cap, seal tubes. Stuffing function is mainly to close the gap between the pump shell and pump shaft, so that the pump does not flow inside the pump to the outside and do not let the outside air into the pump. Always keep the vacuum inside the pump! When the pump shaft and the packing heat generated by the friction depends on the water living water to fill the cooling water sealed circle! To maintain the normal operation of the pump. So in the operation of the pump inspection process on the stuffing box inspection is to pay special attention to! After running about 600 hours to replace the filler.