Plunger Cylinder $—$ Single acting plunger cylinder

This model is a plunger cylinder with a single rod and damping at the end modeled with a spring and damper. This model has one active volume with external leakage. External leakage can be turned off by clearing the hasExternalLeakage setting (found under the Inspector tab in the Parameters $\to$  Leakage section).

Cylinder Geometry This is a simplified overview of the geometric parameters defining the cylinder geometry:

Mechanical Friction This model includes Stribeck Friction (see the following figure).

Connections

 Name Description Modelica ID ${\mathrm{port}}_{A}$ Port A, where oil flows into the component (positive q, port_A.p > chamberA.p means positive dp) port_A ${\mathrm{flange}}_{b}$ Piston rod mounting point b flange_b $\mathrm{mount}$ Cylinder housing mounting point. mount

Parameters

General Parameters

 Name Default Units Description Modelica ID ${\ell }_{\mathrm{rod}}$ $\frac{1}{2}$ $m$ Length of rod RodLength ${\ell }_{\mathrm{housing}}$ $2$ $m$ Length of housing HousingLength ${m}_{\mathrm{piston}}$ $100$ $\mathrm{kg}$ Effective mass of piston and rigidly coupled masses PistonMass ${c}_{A}$ ${10}^{8}$ $\frac{N}{m}$ Stiffness of stop at stroke end A c_A ${d}_{A}$ ${10}^{6}$ $\frac{Ns}{m}$ Damping of stop at stroke end A d_A ${V}_{\mathrm{dead}}$ $0.001$ ${m}^{3}$ Dead volume of chamber if piston is at left end of housing (side a: stroke = 0) dead_volume ${A}_{\mathrm{piston}}$ $0.01$ ${m}^{2}$ Piston area piston_area ${k}_{p}$ $0$ Pressure damping coefficient kp ${\mathrm{ΔT}}_{\mathrm{system}}$ $0$ $K$ Temperature offset from system temperature dT_system $\mathrm{reverse}$ $\mathrm{false}$ Reverse the positive flow in the component reverse

Friction Parameters

 Name Default Units Description Modelica ID ${f}_{\mathrm{breakaway}}$ $100$ $N$ breakaway_friction ${f}_{\mathrm{mixed}}$ $10$ $N$ mixed_friction ${v}_{f\left(\mathrm{mixed}\right)}$ $\frac{1}{10}$ $\frac{m}{s}$ mixed_friction_velocity ${d}_{\mathrm{viscous}}$ $2.5·{10}^{3}$ $\frac{Ns}{m}$ viscous_damping $\mathrm{tabular}$ $\mathrm{false}$ If true, use tabular models, else an analytic one Tabular ${f}_{\mathrm{pos}}$ $\left[0.,1.\right]$ [v, f] Positive sliding friction characteristic (v>=0) f_pos

Initialization Parameters

 Name Default Units Description Modelica ID initial stroke $\frac{1}{2}{\ell }_{\mathrm{housing}}$ $m$ Initial stroke of cylinder, default is middle position InitialStroke

Leakage Parameters

 Name Default Units Description Modelica ID has external leakage $\mathrm{true}$ If true, external leakage at rod seal is included hasExternalLeakage ${G}_{\mathrm{ext}}$ $4.2·{10}^{-13}$ $\frac{{m}^{3}}{s\mathrm{Pa}}$ Hydraulic conductance for external leakage G_ext