2827585
Description
Mind Map by Alexia Ramirez, updated more than 1 year ago
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Created by Alexia Ramirez
almost 9 years ago
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Rotary Pumps in
chemical engineering
- They can accommodate thin to high viscosity liquids, high vacuums
to high pressures, and minute doses to high capacities. The following
are the principle rotary pumps:
- Internal Gear
Pumps
- 1. Liquid enters the suction port
between the rotor and idler teeth.
- 2. Liquid travels through the pump
between the teeth of the
"gear-within-a-gear" principle. The crescent
shape divides the liquid and acts as a seal
between the suction and discharge ports.
- 3. The pump head is now nearly
flooded, just prior to forcing the
liquid out of the discharge port.
- 4. Rotor and idler teeth mesh completely
to form a seal equidistant from the
discharge and suction ports. This seal
forces the liquid out of the discharge port.
- 1. Liquid enters the suction port
between the rotor and idler teeth.
- Applications
- All varieties of fuel oil
and lube oil
- Resins and
Polymers
- Alcohols and solvents
- Asphalt, Bitumen, and Tar
- Polyurethane foam
(Isocyanate and polyol)
- All varieties of fuel oil
and lube oil
- External Gear Pumps
- 1. As the gears come out of mesh, they
create expanding volume on the inlet side of
the pump. Liquid flows into the cavity and
is trapped by the gear teeth as they rotate.
- 2. Liquid travels around the interior
of the casing in the pockets
between the teeth and the casing --
it does not pass between the gears.
- 3. Finally, the meshing of the
gears forces liquid through the
outlet port under pressure.
- 1. As the gears come out of mesh, they
create expanding volume on the inlet side of
the pump. Liquid flows into the cavity and
is trapped by the gear teeth as they rotate.
- Applications
- Various fuel oils and lube oils
- Chemical additive and
polymer metering
- Chemical mixing and blending
(double pump)
- Acids and caustic
- Various fuel oils and lube oils
- Lobe Pumps
- 1. As the lobes come out of
mesh, they create expanding
volume on the inlet side of the
pump. Liquid flows into the
cavity and is trapped by the
lobes as they rotate.
- 2. Liquid travels around the interior of the
casing in the pockets between the lobes and the
casing -- it does not pass between the lobes.
- 3. Finally, the meshing of the
lobes forces liquid through the
outlet port under pressure.
- 1. As the lobes come out of
mesh, they create expanding
volume on the inlet side of the
pump. Liquid flows into the
cavity and is trapped by the
lobes as they rotate.
- Applications
- Polymers
- Paper coatings
- Soaps and surfactants
- Paints and dyes
- Polymers
- Gerotor
Pumps
- 1. Liquid enters the
suction port between the
rotor and idler teeth.
- 2. Liquid travels through the pump between the
teeth of the "gear-within-a-gear" principle. The
close tolerance between the gears acts as a
seal between the suction and discharge ports.
- 3. Rotor and idler teeth mesh completely to
form a seal equidistant from the discharge
and suction ports. This seal forces the liquid
out of the discharge port.
- 1. Liquid enters the
suction port between the
rotor and idler teeth.
- Applications
- Light fuel oils
- Lube oil
- Cooking oils
- Hydraulic fluid
- Light fuel oils
- Internal Gear
Pumps
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