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MapleSim Hydraulics Library from Modelon

DirectionalControl - Overview

These classes model directional control valves actuated by electric coils.  The laminar/turbulent flow through the valve is modelled as flow through orifices without cavitation.  The commanded opening of the valve is input at commandA or commandB, respectively.

The flow capacity of the valve is specified by parameter qnom at the pressure drop Δpnom.  When the pump pressure and the flow rate is high, the unbalanced forces and flow forces acting on the spool are higher than the force generated by the solenoid and the valve is partially closed. The effect can be modelled by the parameters Pmax and coeffP.

The movement of the spool is described by a first-order system. This is appropriate for valves that are directly actuated by a spool. The time to shift from the neutral position to an end position, τopening, may be different from the time to shift to the neutral position, τclosing.

DCV_3_2_PAB - 3 ports, 2 stable positions

DCV_3_2_PAT - 3 ports, 2 stable positions

DCV_4_2_A - 4 ports, 2 stable positions

DCV_4_2_X - 4 ports, 2 stable positions, user-configurable flow-paths

DCV_4_3_A - 4 ports, 3 stable positions

DCV_4_3_B - 4 ports, 3 stable positions

DCV_4_3_C - 4 ports, 3 stable positions

DCV_4_3_D - 4 ports, 3 stable positions

DCV_4_3_X - 4 ports, 3 stable positions, user-configurable flow-paths

DirectionalControl[Basic] - Basic models for directional control valves

DirectionalControl[Basic][Internal] - Internal models

See Also

DirectionalControl[Basic]

DirectionalControl[Basic][Internal]

MapleSim Help System

MapleSim Hydraulics Library from Modelon Overview

MapleSim Library Overview

 


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