Variable vane pump, pilot operated
The pump sucks fluid via connection S and displaces it while pressure at connection P is below the zero stroke pressure p0
, set on the pressure controller. Starting at a pressure of p0 – p_reg
the control piston gets deflected and the flow is reduced. The leakage flow at maximum pressurep_max
is regulated by q_L
.
The average control time for on-stroke control and off-stroke control is defined by t_ctr
.
The maximum theoretical flow is defined by the product of V
and rpm
. The actual maximum flow can be limited by setting q_max
. To take effect, q_max
has to be less than the maximum theoretical flow.