GEAR WHEEL PUMP - HYDRAULIC DEVICE

MECHANICAL TIPS AND STUDY MATERIAL

Gear Wheel Pump

The meshing of two rotating gears provide the pumping action. The construction of gear pump is very simple. One of the gear is connected to driving shaft, which rotates as the shaft supplies power. This gear is connected to another gear called driven gear. These two gears provide meshing. The case surrounds the gear arrangement and the space between gear and casing is filled with oil which is to be pumped. The oil in suction side is carried to delivery side via gears. The meshing of gears .


Does not allow the flow from inlet to outlet directly. The oil is carried forward from suction side through outer tip/edge of gears.


Oil pumped per second or discharge of oil can be calculated by formula


                   (2Lan× N/60)m^3

Where

L = axial length of teeth,

N = speed of theeth in rpm,
a = area between teeth,
n = number of teeth on each gear,

Note - we devide by 60 to obtain discharge in seconds.


Advantage


The flow of fluid is uniform and continuous


Uses



  • For cooling water
  • Provides pressurized oil for lubricating motor parts.

Note- Actual discharge is always less than theoretical.


Volumetric efficiency = Actual discharge / theoretical discharge
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