Hydraulics in Wind Turbines

Question 1

Describe Pascal’s Law, what is the formula, and give an example for wind turbines.

Answer 1

Pascal’s Law
1) Defines the proportionality between Pressure, Force, and Area.
2)Force = Pressure x Area
3) When tensioning bolts, if the area of the piston is = 5.4 sq. In. (3500.72 sq. mm), and the torque target is 75,000 ft. lbs. then give the pump psi. (Answer at end)

Extras
(also Pascal’s principle or the principle of transmission of fluid-pressure)
- A principle in fluid mechanics that states that a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere. The law was established by French mathematician Blaise Pascal in 1653 and published in 1663.

P = F / A
P = 75,000 ft. Lbs. / 5.4 sq. in. = 13,888 psi

Question 2

Name the 5 parts of a hydraulic system.

Answer 2

1) Oil or Fluid
2) Oil Reservoir
3) Pump
4) Piping / Hose
5) Pressure Control