The flow rate of the screw pump is linear with the rotation speed. Compared with the high-speed screw pump, the flow rate and the head can be increased, but the power is obviously increased. The high rotation speed accelerates the abrasion between the rotor and the stator, and the screw pump must be prematurely failed. Moreover, the high-speed rotary screw pump has a short stator rotor length and is easily worn, thereby shortening the service life of the screw pump. By reducing the speed through a speed-reducing mechanism or a stepless speed-regulating mechanism, the speed is kept within a reasonable range of three hundred revolutions or less, and the service life can be extended several times compared with a high-speed rotary screw pump. The screw pump must not be allowed to operate in the event of a broken material. Once it occurs, the rubber stator will instantly generate high temperatures and burn out due to dry friction. Therefore, the crusher is in good condition and the grill is unblocked. This is one of the necessary conditions for the normal operation of the screw pump. For this reason, some screw pumps have also installed a shut-off stop device on the pump body, a vacuum will be generated inside the chamber, and the vacuum device will stop the screw pump operation. The screw pump is a positive displacement rotary pump. When the outlet end is blocked, the pressure will gradually increase to exceed the predetermined pressure value. At this point, the motor load increases dramatically. The load of the related parts of the transmission machinery will also exceed the design value. In severe cases, the motor will be burned and the transmission parts will be broken. In order to avoid damage to the screw pump, a bypass relief valve is generally installed at the outlet of the screw pump to stabilize the outlet pressure and maintain the normal operation of the pump. There are many types of screw pumps on the market. Relatively speaking, the imported screw pumps are of reasonable design and excellent materials, but the prices are relatively high. Some of the services are less than λ, the accessories are expensive, and the long order period may affect the production. normal operation. Screw pumps are widely used in the transportation of water, wet sludge and flocculant liquids in sewage treatment plants due to their characteristics of variable delivery, strong self-priming ability, reversibility, and the ability to transport liquids containing solid particles. . Screw pump selection should follow the principles of economy, reasonableness and reliability. If the design is poorly selected, it will cause troubles for future use, management and maintenance. Therefore, using a practical and reliable screw pump in accordance with the actual production needs can not only ensure the smooth production, but also reduce the repair cost. Screw pumps are widely used in the transportation of water, wet sludge and flocculant liquids in sewage treatment plants due to their characteristics of variable delivery, strong self-priming ability, reversibility, and the ability to transport liquids containing solid particles. . Screw pump selection should follow the principles of economy, reasonableness and reliability. If the design is poorly selected, it will cause troubles for future use, management and maintenance. Therefore, using a practical and reliable screw pump in accordance with the actual production needs can not only ensure the smooth production, but also reduce the repair cost. More vacuum pump information is available at China Vacuum Pump Trading Network (/). All-in-one Injection Moulding And Metal Stamping Service Provider Manufactures and exports quality OEM plastic injection molding parts and plastic injection moulds injection molding and metal stamping DoHform Mold(China) Co,.Ltd. , https://www.dhform.com
Characteristics of Screw Pump and Selection and Application Process in Sewage Treatment