First, the three screw pump speed selection Three screw flow and speed into a linear relationship, relative to the low-speed screw pump, high-speed screw pump although it can increase the flow and lift, but significantly increased power, high speed accelerated rotor And stator wear, will inevitably lead to failure of the screw pump, screw rotor and high-speed fixed rotor length is very short, easy to wear, thus shortening the life of the screw pump by reducer or stepless speed reduction mechanism to reduce Speed, the exploration speed maintained at a reasonable range of three hundred revolutions per minute, and high-speed operation of the screw pump, the service life can be extended several times. Second, the quality of the screw pump Now on the market of the type of screw pump Relatively speaking, imported screw pump design is reasonable, the material is excellent, but the price is higher, the service is not in place, the parts price is high, the ordering cycle is long, which may affect the normal operation of the production.Most of the domestic production of imitation imported products , Good and bad product quality, the choice of domestically produced products, when considering its cost, the choice of low speed, long lead, transmission parts of good quality, long life rating products. To ensure that debris does not enter the pump Wet sludge mixed with solid impurities will screw the rubber material stator damage, so to ensure that debris does not enter the cavity of the pump is very important, many sewage treatment plant before the installation The grinder, and some grille installations or filters, blocking debris into the screw pump, the grille should be promptly salvaged to avoid clogging. Fourth, to maintain a constant outlet pressure Screw pump is a positive displacement rotary pump, when After the outlet is blocked, the pressure will gradually increase so that the pressure exceeds the predetermined value, the load on the motor will increase rapidly, and the load on the related parts of the transmission will exceed the designed value. In severe cases, the motor will be burned out and the transmission parts will break. To avoid damage to the screw pump, usually at the outlet of the three screw pump to install bypass relief valve to stabilize the outlet pressure, to maintain the normal operation of the pump. Fifth, to avoid breaking Three screw pump is not allowed to run in the case of broken material , Once occurred, the rubber stator due to dry friction, instantaneous heat generated and burned, so the grinder intact grille smoothness is one of the necessary conditions for the normal operation of the screw pump, for which some screw pumps are still pump On the installation of broken down device, when the material breaks, due to the self-priming screw pump has the characteristics of the cavity will produce a vacuum, the vacuum pump will stop the pump operation.
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