Tính toán thủy lực - kí hiệu và công thức

Cylinder Pressure (PSI) = Force (pounds)/Area (sq. Inch)

PSI = F/A

Cylinder Area (sq. inch) = 3.1416 x Radius Squared

A = 3.1416 x R(sq.)

Cylinder Force (pounds) = Pressure (PSI) x Area (sq. inch)

F = P x A

Cylinder Speed (ft./sec.) V = (231 x gpm) / (12 x 60 x Area)

V = (0.3208 x GPM) / A

Cylinder Volume, Gallons (Vol) = (Area x Stroke in inches) / 231

Vol. = (A x Stroke) / 231

Fluid Motor Torque (in. lbs.) T = Pressure (psi) x disp. (cu. in. / rev.) / 6.2822

T = (PSI x disp.) / 6.2822

Fluid Motor Speed (RPM) = (231 x GPM) / disp. (cu. in.)

RPM = (231 x GPM) / disp.

Fluid Motor Horsepower = Torque (in. lbs.) x RPM / 63025

HP = T x RPM / 63025

Pump Output Flow (GPM) = ((RPM) x disp. (cu. in.)) / 231

GPM = RPM / disp./231

Pump Input Horsepower = GPM x Pressure (psi) / 1714 x eff.

HP = (Q x P) / 1714 x E

Pump Input Torque (T) = (GPM x PSI x 3.06) / RPM /eff

T = (GPM x PSI x 3.06) / RPM / eff

Pump Displacement Cu. In. (Disp.) = GPM x 231) / RPM /eff

Disp. = (GPM x 231) / RPM / eff

Pump Input Speed ( RPM) = (GPM x 231) / Disp. / eff

RPM = (GPM x 231) / Disp. / eff

Pump Efficiency (eff) = Actual Flow (GPM) / Theoretical Flow (GPM)

eff = Actual GPM / Ther GPM

Pump Flow with PTO Drive (GPM) = (Engine RPM x % PTO x Disp. x eff) / 231

GPM = (Eng. RPM x % PTO x Disp. x eff) / 231

Velocity of Oil Flow in Pipe (Vel) = GPM x 0.3208 / Area

Vel = (GPM x 0.3208) / Area

Recommended Maximum Oil Velocity in Hydraulic Lines, FPS = Feet per Second

Pump Suction: 2-4 FPS
Pressure Lines to 3000 PSI: 15-20 FPS
Pressure Lines over 3000 PSI: 25 FPS