Recently, there will be another strong cooling weather nationwide, especially in the north, where the temperature has reached below zero in many areas. Such a situation is a huge test for the use of lobe pumps, which are more widely used in China. If placed outdoors in the cold, it will have an effect on the lobe pump. Therefore, it is important to pay more attention to maintenance during the cold winter months in order to prevent freezing and cracking of the pump, which can lead to a shortened service life of the pump.
Maintenance methods for lobe pumps in winter
1、After the pump is out of use, drain the remaining water in the pump and pipeline, and clean the external mud to avoid freezing and freezing of water to crack the pump body and water pipe.
2, pump bottom valve, bends and other cast iron parts, should be used to wire brush the rust clean, then first coated with anti-rust paint and then painted, to be dried and then put into the machine room or storage room ventilation dry place to keep.
3, with belt drive, the belt removed with warm water to clean and dry after hanging in a dry, no direct sunlight place, also do not store in the place with oil, corrosive substances and smoke. In any case, do not make the belt stained with oil, diesel or petrol and other oil substances, do not apply rosin and other sticky substances.
4, check the ball bearing, such as the inner jacket wear, absentee movement, ball wear or the surface of the spot should be replaced. For those that do not need to be replaced, gasoline or paraffin can be used to clean the bearings, grease them and reassemble them.
5、Check whether the impeller of the pump has cracks or small holes, whether the impeller fixing nut is loose, if there is damage should be repaired or replaced. If the impeller is worn too much or has been broken, it should generally be replaced with a new impeller. Local damage can be welded and repaired, and the impeller can also be repaired with epoxy resin mortar, and the repaired impeller should generally be subjected to static balance test. Check the clearance at the impeller grinding ring, if it exceeds the specified value, it should be repaired or replaced.
6、Pump shafts that are bent or badly worn should be repaired or replaced, otherwise they will cause unbalance of the rotor and wear of the parts concerned.
7, remove the screws soaked in diesel fuel with a wire brush to scrub clean, and coated with oil or grease, re-installed or wrapped in plastic and put away (can also be dipped in diesel fuel to save), so as not to rust or lost.