Marine Hydraulic Accumulator, Power Pack & Cylinder Sizing Tool
Cylinder Force • Pump Flow • Motor Power • Accumulator Reserve • N-1 Capacity • Rod Buckling • Reservoir Basis • Thermal Loss
Marine Hydraulic Accumulator, Power Pack & Cylinder Sizing Tool
Size and screen a shipboard hydraulic circuit from actuator force and stroke demand through pump flow, motor power and emergency accumulator reserve. Advanced mode adds multiple cylinders, power-pack units, gas accumulators, simultaneous demand, rod-buckling screening, N-1 capacity and a pressure / load sensitivity envelope.
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Eight inputs for a fast first-pass hydraulic size.Simple mode sizes a push cylinder, pump flow, motor input and nominal gas-accumulator shell volume. Manufacturer pressure ratings, rod stability, duty-cycle heating, valve losses and class/project requirements still need verification.CylinderRequired bore & oil volume
Power packPump flow & motor kW
AccumulatorEmergency oil reserve
Duty Point
kN at the cylinder.
mm.
seconds for full stroke.
bar(g).
bar(g) at end of emergency delivery.
bar(g), user-selected / OEM-verified.
Full extension strokes supplied from accumulator reserve.
% used for force and motor-input screening.
System Design Basis
bar(g).
bar(g).
bar(g), verify against accumulator maker guidance.
1.0 approximates slow/isothermal, ~1.4 rapid/adiabatic.
%.
% from motor shaft to hydraulic output.
% above modeled simultaneous demand.
% of required pump flow after loss of largest available pump.
minutes of required pump flow, user-entered design basis.
% for indicative conversion-loss heat load.
User-entered screening target. Verify with cylinder manufacturer.
Hydraulic Cylinder Register
Emergency strokes are modeled as full cap-end extension strokes. Rod buckling uses a simplified Euler screen with steel E = 210 GPa and the entered unsupported rod length / end-condition factor.
| Use | Cylinder | Push load kN | Pull load kN | Bore mm | Rod mm | Stroke mm | Extend s | Retract s | Concurrent? | Emergency ext. strokes | Free rod L mm | End K |
|---|
Hydraulic Power Pack Register
| Use | Unit | Available? | Rated flow L/min | Max pressure bar | Motor kW |
|---|
Accumulator Bank Register
Each row uses the common entered precharge, minimum pressure, maximum pressure and gas exponent. Enter shell / gas volume at precharge condition.
| Use | Accumulator bank | Available? | Shell volume each L | Quantity |
|---|
Engineering / Safety Checks
Engineering boundary: this tool is a sizing and screening model. Final cylinder construction, rod stability, accumulator precharge, pressure-vessel compliance, relief settings, pump/motor selection, reservoir design, hose/pipe sizing and marine class approval remain equipment- and project-specific.