What is the difference between lobe pump and screw pump?
2022-11-08 17:06:26
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The lobe pump and the screw pump are positive displacement pumps, which their performance is basically similar: they can smoothly transport medium and high viscosity and have a high conveying pressure. So what's the difference between a lobe pump and a screw pump? 1.lobe pump and screw pump internal structure is different. The lobe pump is through two reverse rotation of the rotor, the volume of the feed port to the conveying port from large to small so as to achieve the purpose of conveying materials, and the screw pump is made of a spiral screw in the rubber stator high-speed rotation, so that the material can be from the front to the back of the spiral rotation finally discharged from the discharge port. 2.lobe pump and screw pump parts life is different. Because of the basic zero wear between the parts of the lobe pump, and the service life is longer, the wear of the parts of the flow is mainly from the abrasive and corrosive chemical composition in the medium; There is friction between the rotor and the stator of the screw pump, and the conveying belt particle material is easy to affect the life of the wear parts. The stator is subjected to the stress of the eccentrically rotating rotor, which increases the wear between the components. Even if the transmission of the medium without any particulate matter, the stator of the progressing cavity pump will have a certain amount of wear over time.
3.lobe pump and screw pump health grade is different. Screw pump has one of the biggest shortcomings, it determines that it is not suitable for health has strict requirements: screw pump non-fluid surface and many defects in the chamber, determine that it can not become a sanitary vacuum pump, cavity wall tetrafluoroethylene or rubber material damage is more likely to be transmitted medium life pollution. The lobe pump because of the streamline steel structure of the rotor and the rotor room basically no dead point and non-metallic parts, so strictly speaking in food and beverage, medicine and other health requirements of the industry is very suitable. But the disadvantage is that the lobe pump cleaning is not convenient. 4.lobe pump and screw pump speed is different. The speed of the rotor pump is very low, generally between 200rmp and 600rpm, and the delivered material is output smoothly without damaging its composition. Higher screw pump speed, resulting in the conveying material by centrifugal action, resulting in screw pump in the conveying of mixed materials often produce a material composition of the phenomenon, the most important impact on the quality of finished products.
