Page 158 - Fluid Power Engineering

132 Cha pte r F o u r

6 Radial piston pump
(eccentric shaft, valve
type)
The rotating eccentric
shaft produces a radial
motion of the pistons.
V = 0.5–200 cc
g
n = 500–2000 rpm
p = 780 bar
max π
V = d ez
2
g 2 k
7 Radial piston pump
(with crank shaft)
V = 500–4000 cc
g
n = 500–2000 rpm
p = 1200 bar
max
π
V = d hz
2
g
4
h = 2e

8 External gear pump
Volume is created between
gears and housing.
V = 0.4–1200 cc
g
n = 300–4000 rpm
p = 250 bar
max
V = 2π bm z +( sin 2 γ)
2
g

9 Internal gear pump
Volume is created between
gears, the crescent sealing
element, and housing.
V = 0.4–350 cc
g
n = 500–2000 rpm
p = 350 bar
max