1. Comparison between Gear Pumps, Vane Pump and Piston Pump
...._____G
_ear
_ Pu
_ m
_p
____......,I ...
I ____v
_an
_ e
_P
_u
_m
_p______,I ...
I ____
P_
is
_t_
on
_ Pu
_ m
_
p______,
Construction :
It consists of two gears in
mesh with each other,
mounted inside a closed
casmg.
One is driver and the other is
driven.
It consists of a cylindrical
rotor with radial slots. Vanes
are inserted in the slots.
The rotor is mounted with an
offset in the casing
It consists of a cylinder block
with axial or radial bores.
Pistons are inserted in the
bores.
One end of the piston is
connected
component
to rotating
2. Comparison between Gear Pumps, Vane Pump and Piston Pump
I LI_ _ _ _
v
__
ane_P
_u
_m
__
P ____I LI_ _ _ _
P_
is
_t_
on
_ Pu
_ m
_
p____
~====================~
IWorking (Function) I
Gear Pump
When the driver is rotated by
means of any prime mover,
driven will also rotate.
Thus the oil is sucked, trapped
between gear teeth and casing,
carried from inlet to outlet.
Rotation of cylindrical rotor causes
the size of the pockets to grow
continuously on one side and to
reduce on the other side.
This causes filling of oil on suction
side and delivery of oil on the other
side.
Rotation of the moving
component causes the pistons to
reciprocate in the bores.
Half rotation of the cylinder block
causes suction of oil into the bores
and the next half causes discharge.
3. Comparison between Gear Pumps, Vane Pump and Piston Pump
,______
G
_
e_
ar
_Pu
_ m
_p
_____.l ._I____
v_an
_ e_
P
_
u_
m
_
p______.l ._I____
P_
is_
to
_n
_Pu
_ m
_p
______.
Pressure, discharge, speed and volumetric efficiency :
p = 35 to 200 bar
Q = up to 45 m3/hr
N = 1200 to 2500 rpm
llvol = 80 to 90%
-
p = 70 to 140 bar
Q= up to 20 m3
/hr
N = 1200 to 1800 rpm
llvol = 90 to 95%
p= 140 to 850 bar
Q = up to 45 m3/hr
N = 1200 to 3000 rpm
llvol = 95 to 98%
Ml:CHA.VICAL l!..'16.L'UIU.,;&
