The service life of the screw pump is affected by these factors
2022-09-22 17:29:52
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The screw pump is widely used in the transportation of water, wet sludge and flocculant liquid in sewage treatment plants because of its characteristics of variable amount transportation, strong self-priming ability, reversibility, and the ability to transport liquids containing solid particles.
1. Screw pump speed The flow rate and speed of the screw pump are linearly related to the low speed of the screw pump. The high speed of the screw pump can increase the flow and head, but the power increases significantly. The high speed accelerates the wear between the rotor and the stator, which must cause the screw pump to fail prematurely. , and the length of the stator and rotor of the high-speed screw pump is very short, which is easy to wear, thus shortening the service life of the screw pump. The speed is reduced by a reducer or a stepless speed regulating mechanism to keep the exploration speed within a reasonable range of 300 rpm. Compared with the high-speed screw pump, the service life can be extended several times. 2. Quality of screw pump At present, there are many types of screw pumps on the market. Relatively speaking, imported screw pumps have reasonable design and high-quality materials, but the price is high, the service is not in place, the price of accessories is high, and the order cycle is long, which may affect the normal operation of production. Domestic products mostly imitate imported products, and the quality of the products is very good and bad. When choosing domestic products, when considering cost performance, choose low speed and long lead, excellent transmission parts materials, and long product life.
3. Make sure that the sundries do not enter the pump body The solid debris mixed in the wet sludge will damage the stator material of the rubber screw pump, so it is very important to ensure that the sundries do not enter the pump cavity. To prevent debris from entering the pump, the power grid should be cleaned in time to avoid blocking fishing. 4. Avoid cutting The screw pump is never allowed to operate under cutting conditions. The rubber stator is burnt out due to the high temperature instantaneously due to the occurrence of dry friction. Therefore, a complete grinding machine is a necessary condition for the smooth flow of the grille. Stop device, when the screw pump is in normal operation during cutting, a vacuum chamber will be generated due to the self-priming function of the screw pump, and the vacuum device will stop the screw pump. 5. Keep the outlet pressure constant The screw pump is a positive displacement rotary pump. When the outlet is blocked, the pressure will gradually increase, so that the pressure exceeds the predetermined pressure value. At this time, the motor load increases sharply. The load of the relevant parts of the transmission machinery exceeds the design value, the motor is burned, and the transmission parts are seriously damaged. In order to avoid the damage of the screw pump, the bypass relief valve is usually installed at the outlet of the screw pump to stabilize the outlet pressure and make the pump run normally.
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