Formules hydrauliques usuelles

Pression (bar):

    \[P=\frac{F}{S}\]

F = Force (daN), S = Surface (cm²)

Force (daN):

    \[F={P} \times {S}\]

P = Pression (bar), S = Surface (cm²)

Volume (litres ou dm^3):

    \[V=\frac{S \times C}{10}\]

S = Surface (cm²), C = Course (m)

Surface de poussée (cm²) Sp = (∅p)² × 0,7854
Surface de tige (cm²) St = (∅p)² × 0,7854
Surface de traction (cm²) S = Sp – St

Øp = Diamètre piston (cm), Øt = Diamètre tige (cm)

Vitesse de vérin hydraulique (m/s):

    \[V=\frac{Q}{S \times 6}\]

Q = Débit (l/min), S = Surface de traction (cm²)

Débit (l/min):

    \[Q={S} \times {V} \times {6}\]

V = Vitesse (m/s), S = Surface de traction (cm²)

Couple (mdaN):

    \[C={F} \times {d}\]

F = Force (daN), d = Distance (m)

Couple moteur hydraulique:

    \[Cm=\frac{p \times cyl}{628}\]

p = Pression (bar), cyl = Cylindrée (cm^3/tr)

Vitesse de rotation moteur hydraulique:

    \[Vr=\frac{Q \times 1000}{cyl}\]

Q = Débit (l/min), cyl = Cylindrée (cm^3/tr)

Puissance (mdaN/s):

    \[P=\frac{F \times \Delta \L}{t}\]

F = Force (daN), ΔL = Déplacement (m), t = Temps (s)

Puissance d’entrainement pompe hydraulique (kW):

    \[P=\frac{p \times Q}{600}\]

p = Pression (bar), Q = Débit (l/min)

Puissance moteur hydraulique (kW):

    \[Pm=\frac{p \times cyl \times V}{6 \times 10^{5}}\]

p = Pression (bar), cyl = Cylindrée (cm^3/tr), V = Vitesse (tr/min)