summary
Acid and alkali resistant screw pump is a new type of pump that operates according to the principle of rotary meshing and volumetric design. The main working components are eccentric screw (rotor) and fixed liner (stator). The special geometric shapes of these two components form separate sealed chambers, and the medium flows uniformly axially. The internal flow rate is low, the volume remains constant, and the pressure is stable, so there is no vortex or agitation. Due to the use of multiple elastic materials in the stator, this type of pump has characteristics that ordinary pump types cannot handle for the transportation of high viscosity fluids and media containing hard suspended particles or fibers. Its flow rate is directly proportional to the rotational speed. The transmission can be achieved through direct coupling, or through variable speed motors, V-belts, gearboxes, and other devices. Overall, it has fewer parts, a simple and compact structure, and easy disassembly and maintenance. The rotor and stator are vulnerable parts of this pump. The output pressure of each stage pump is 0.6MPa, the head is 60m (for clean water), and the self suction height is generally 6m. It is suitable for conveying medium temperatures below 80 ℃ (special requirements can reach 150 ℃).
principle
Acid and alkali resistant screw pumps belong to the principle of volumetric pumps. They rely on the screw shaft (rotor) and rubber sleeve (stator) to mesh with each other. When the power end drives the rotor to rotate around the center of the stator through a universal joint, the rotor and stator continuously mesh to form a true cavity. These vacuum cavities move uniformly axially, transporting the conveying medium from the inlet to the outlet. The medium sucked into the vacuum cavity flows through the stator without being stirred or damaged. Therefore, it has strong adaptability to the medium, stable flow rate, and basically no pressure pulsation.
Advantages of use
Compared with centrifugal pumps, screw pumps do not require the installation of valves, resulting in more stable flow rate;
Compared with plunger pumps, G-type single screw pumps have stronger self-priming ability;
Compared with diaphragm pumps, screw pumps can transport various mixed impurities containing gases, solid particles or fibers, as well as various corrosive substances;
Compared with gear oil pumps, high viscosity G-type single screw pumps can transport media with higher viscosity;
Unlike plunger pumps, diaphragm pumps, and gear pumps, screw pumps can be used for pharmaceutical filling and metering.
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