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GEARPUMP
Mariana Gallardo
table
of
contnents
1 External Gear Pump
2 Gears
3 Body (Housing)
4 Balancing Blocks
5 Cap
6 Base
7 Sealings
8 Fasteners
Bushing9
10 Calculations
11 Difficulties and solutions
Conclusion
12 Drawings
GEAR
PUMP
DESCRIPTION:
Often used on thin liquids such as solvents and fuel oil, they excel at effi-
ciently pumping thick liquids such as asphalt, chocolate, and adhesives
The internal gear pump is non-pulsing, self-priming, and can run dry for
short periods. They’re also bi-rotational, meaning that the same pump can
be used to load and unload vessels. Because internal gear pumps have only
two moving parts, they are reliable, simple to operate, and easy to maintain.
How Internal Gear Pumps Work
1. Liquid enters the suction port between the rotor and idler teeth. The arrows indicate
the direction of the pump and liquid.
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 dis-
charge 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.
GEARMaterial: Steel
Function:
External Gear: An external precision gear pump is usually limited to a
maximum working pressure of 210 bars (21,000 kPa) and a maximum
speed of 3,000 rpm. Some manufacturers produce gear pumps with higher
working pressures and speeds but these types of pumps tend to be noisy
and special precautions may have to be made.
Suction and pressure ports need to interface where the gears mesh
Gear: main components in pump which push fluid by rotation.
bodyMaterial: 6061 Aluminum Alloy
Function:
Control Fluid on the inlet side flows into and is trapped between the
rotating gear teeth and the housing
Balancing
BlocksMaterial: 6061 Aluminum Alloy
Function:
To fix zaxis & placing gears in housing.
capMaterial: 6061 Aluminum Alloy
Function:
To access inside components and easy assembling and dis assembling
BaseMaterial: 6061 Aluminum Alloy
Function:
Cover the bottom of the assembly so the components stay in their place.
SealingsMaterial: rubber
Function:
Prevent liquid leakigs
FastenersMaterial: steel mild
Function:
Join or affixes all components together.
BushingMaterial: Phosphor Bronze
Function:
Decrease fraction between gears and body and provide shaft
 
 
 
 
 
 
 
 
Safty Factor = 2 
(for Al alloy 6061) 
 
Casing = AL Alloy 6061   
Bolts and Nuts = Steel Mild   
                                                  
   
 
 
 
   
 
 
calculations
 
Min Thickness of Casing: 
 
 
 
 
Area of Two Gears (Working Area) :   
 
 
Total F = A x P 
             = 21.086 x 2500 
             = 56612.5 lbs 
Design = 4 Bolts and Nuts 
 
 
 
Hex  ​      ,   
     , ​Thickness : .574 inch 
 
 
 
 
 
 
So nuts are OK. 
 
Minimum thickness of covers: 
  
 
 
 
 
difficulties
And
solutionsDIFFICULTY : Limited time to finish the project.
SOLUTION: Divide the project between the members.
DIFFICULTY: Software problems (not fast enough and not enought resources to
make a original project)
SOLUTION: Changwe the computer and install new softwares.
conclusion
As a drafter we learned to work as part of a team; deal with difficulties, new soft-
ware, lack of time, missing information and gathering of information.
It was helpful to prepare ourselves for the final project so that way we will know
how to overcome and succeed in our final project.
We liked the experience because it was challenging and a new way of working
during class.
PRESENTATION
https://prezi.com/abbdvhdamiic/external-gear-pump/
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
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