Precautions for the work of the hottest three scre

Precautions for three screw pump work

first, the speed of three screw pump is selected

the flow of three screw pump is linear with the speed. Compared with low speed screw pump, high speed screw pump can increase the flow and head, but the power is significantly increased. High speed accelerates the wear between rotor and stator, which must make the screw pump premature failure, and the length of stator and rotor of high speed screw pump is very short, which is very easy to wear, Therefore, the service life of screw pump is shortened

reduce the speed through the reducer or stepless speed regulation mechanism, so that the speed can be kept within a reasonable range of less than 300 revolutions per minute. Compared with the screw pump running at high speed, the service life can be extended several times

second, the quality of screw pumps

there are many kinds of screw pumps on the market now. Relatively speaking, imported screw pumps have reasonable design and excellent materials, but the price is high, some services are not in place, the price of accessories is high, and the order cycle is long, which may affect the normal operation of production

most domestic products imitate imported products, with mixed quality. When selecting domestic products and considering their cost performance, products with low speed, long lead, excellent transmission components and long rated life should be selected

third, ensure that sundries do not enter the pump body

the solid sundries mixed in the wet sludge will damage the rubber stator of the screw pump, so it is very important to ensure that sundries do not enter the cavity of the pump. Many sewage plants have installed shredders in front of the pump, and some have installed grating devices or filters to prevent sundries from entering the screw, which has a fast running speed. The grating should be removed in time to avoid blockage

fourth, maintain a constant outlet pressure

screw pump is a positive displacement rotary pump. When the outlet end is blocked, the pressure will gradually increase, so that it exceeds the expected pressure value At this time, the motor load increases sharply The load of relevant parts of transmission machinery will also exceed the design value. In serious cases, the performance index is very lacking, and the motor will be burned out and the transmission parts will be broken In order to avoid damage to the screw pump, a bypass overflow valve will be installed at the outlet of the three screw pump to realize the annual capacity of 50000 tons of lithium ion cathode material and 10billion watt hour power battery, so as to stabilize the outlet pressure and maintain the normal operation of the pump

v. avoid material breaking

the three screw pump is never allowed to operate under the condition of material breaking. Once it occurs, the rubber stator will be burned out due to dry friction and high temperature instantly. Therefore, the integrity of the crusher and the smoothness of the grille are one of the necessary conditions for the normal operation of the screw pump. For this reason, some screw pumps have also installed material breaking shutdown devices on the pump body. When material breaking occurs, vacuum will be generated in the cavity due to the self-priming function of the screw pump, The vacuum device will stop the screw pump

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