Shear pumps are a specialized fluid handling device that applies strong shear force to fully disperse and mix different phases of fluid substances. They are particularly effective for substances that require high shear force to reduce particle size or ensure homogeneous mixing. Their performance and characteristics are significant in drilling fluid preparation.
When preparing mud, polymers and bentonite are continuously sheared, refined, and mixed by the shear pumps, accelerating the dispersion of polymer or bentonite particles, reducing hydration time, and increasing the dissolution rate of additives, allowing the mud to quickly achieve the desired rheological properties.
Shear pumps generate intense shear force through the relative motion between the stator and rotor. When the medium enters the pump chamber, the high-speed rotating rotor continuously shears the material against the stator wall, forming a homogeneously mixed fluid
Under the action of the centrifugal force generated by the high-speed rotating rotor, the material is sucked into the pump chamber from the inlet of the pump head.
The strong centrifugal force radially throws the material into the narrow and precise gap between the stator and rotor. Simultaneously subjected to centrifugal squeezing, impact, and other forces, the material undergoes preliminary dispersion and mixing.
The high linear velocity generated at the outer end of the high-speed rotating rotor creates intense mechanical and hydraulic shearing, fluid layer friction, impact, and tearing. This makes the material rapidly and fully crushed, dispersed, and mixed. After several cycles within the pump head, the material is discharged through the outlet.
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