The speed of the first and third screw pumps is linear with the flow rate of the three-screw pump. Compared with the low-speed screw pump, the high-speed screw pump can increase the flow and lift, but the power is obviously increased, and the high speed is accelerated. The wear between the rotor and the stator must cause the screw pump to fail prematurely, and the rotor of the high-speed screw pump has a short stator length and is easy to wear, thus shortening the service life of the screw pump.
Reduce the speed through the reducer or stepless speed regulation mechanism, so that the speed of the survey is kept within a reasonable range of less than three hundred revolutions per minute. Compared with the high speed screw pump, the service life can be extended several times.

Second, the quality of the screw pump There are many types of screw pumps on the market. Relatively speaking, the imported screw pump has reasonable design and excellent materials, but the price is high, the service is not in place, the price of the accessories is high, and the order period is long. It may affect the normal operation of production. Most of the domestically produced products are imitation imported products. The quality of the products varies greatly. When selecting domestically produced products, when considering the cost performance, the low-speed, long-lead, and transmission components are excellent in material quality. Long life product.

Third, to ensure that debris does not enter the pump body wet sludge mixed solid debris will cause damage to the rubber material of the screw pump stator, so it is very important to ensure that debris does not enter the pump cavity, many sewage plants in front of the pump A pulverizer is installed, and some grilling devices or strainers are installed to block debris from entering the screw pump. For the grille, it should be cleaned in time to avoid clogging.

Fourth, maintain a constant outlet pressure Screw pump is a volumetric rotary pump, when the outlet end is blocked, the pressure will gradually increase, so that the predetermined pressure value is exceeded. At this time, the motor load increases sharply. The load of the transmission machinery related parts It will also exceed the design value. In severe cases, the motor will burn out.
The transmission parts are broken. In order to avoid damage to the screw pump, a bypass relief valve is usually installed at the outlet of the three-screw pump to stabilize the outlet pressure and keep the pump running normally.

5. Avoiding the breakage The three-screw pump must not be allowed to run under the condition of material breakage. Once it happens, the rubber stator will burn out due to dry friction, so the crusher is intact and the grille is smooth. One of the necessary conditions, for this reason, some screw pumps also have a material shut-off device installed on the pump body. When the material is broken, due to the self-priming function of the screw pump, a vacuum will be generated in the cavity, and the vacuum device will cause the screw pump. Stop working.