Page 150 - Fluid Power Engineering
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124 Cha pte r F o u r
FIGURE 4.36 A variable displacement vane pump with a pressure-unbalanced
rotor in off-stroke mode. (Courtesy of Bosch Rexroth AG.)
FIGURE 4.37 A variable displacement vane pump with a pressure-unbalanced
rotor in on-stroke mode. (Courtesy of Bosch Rexroth AG.)
piston is loaded by a spring (5), which puts the cam in its extreme
eccentric position, at the pump’s startup. Then, when the pump oper-
ates and the pump exit pressure builds up, the pressurization of the
spring chamber determines the position of the stator (cam) and con-
sequently the pump displacement.
