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Progressive Cavity Pump Working
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By Rashad
- Posted on
- MechanicalPumps
A progressing cavity pump may be a positive displacement pump using a spiral ‘worm’ rotor and stator coil assembly to form temporary chambers to draw fluid into, that ‘progress’ through the pump leading to the fluid being expelled through the discharge port.
A typical progressing cavity pump options a suction recess that feeds into associate degree elongated casing. inside this casing sits a spiral ‘worm’ rotor and stator coil assembly. The rotor helix fashioned} off-set to the stator coil making cavity areas within the assembly that ar formed by temporary seals because the rotor contacts the surface of the stator coil. because the rotor begins to maneuver in associate degree eccentric fashion, the cavities kind, attract product and ar ‘progressed’ on the assembly and therefore the product is expelled through the discharge port.
What fluids and applications may be a progressing cavity pump appropriate for?
A progressing cavity pump excels once handling extremely viscous fluids that ar needed to be moved long distances (discharge pressure up to forty eight bar). Typical fluids could embrace suspension, mashes, pulps, dough from waste water treatment plants, anaerobic digestion facilities and paper employment plants. because the pump rate of flow is proportional to the speed the pump are often used for the dosing of viscous fluids like additives and chemicals. Models ar accessible for dosing-type applications, sanitary environments and drum-emptying.
Types of progressing cavity pumps
Progressing cavity pumps are often custom-made and such that with a spread of accent elements and configurations to accommodate the tough fluids it’s expected to handle.
Examples include:
The feed recess with totally different screw and paddle feeders to interrupt up solids.
Mechanical seal arrangements to guard against extremely abrasive wear.
Hygienic-compliant materials and configuration.
Compact build dosing kind pumps.
Vertical build units for barrel removal.
Progressing cavity pumps should not dry because the heat generated by the rotor and stator coil will cause failure – but there ar several accent additions to guard against this, each from the suction facet and on the pump itself.
Geometries
Progressing cavity pumps ar accessible with varied geometries, generally in numerous ratios, that result the degree of entry of the merchandise into ensuing cavity and therefore the degree of potency and protection between every cavity. ‘Standard’ pure mathematics is typically best for thicker material because the pitch permits for the viscousness of the merchandise whereas long pure mathematics with shallow curves and bigger surface contact between the rotor and stator coil provides a lot of potency.
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