44 Hydraulic & Pneumatic Systems Flashcards
Ratio of the change in stored volume to the change in pressure is known as the fluid
Compliance AKA Capacitance
Formulas used to calculate pipe wall thickness in a hydraulic mechanism
Lame, Boardman, Barlow
A flexible hose is pressurized to more than 1.7 MPa. What is most nearly the working pressure when taken as a percentage of the burst pressure?
The working pressure is 25% of the burst pressure.
As it relates to hydraulic components, what does the acronym NPTF mean?
National Pipe Thread for Fuel is used to designate a class of threaded fittings with tapered heads. When the male and female fittings are joined, the threads clash and form a seal that prevents fuel leakage.
What are the basic components of a hydraulic system?
Fluid, reservoir, pump, lines, valves, actuator. The pump moves the hydraulic fluid from the reservoir through the lines to the actuator. Movement of the fluid is controlled by valves.
What component is NOT part of a pneumatic system?
Hydraulic and pneumatic systems both have lines, valves and actuators. Hydraulics include pumps to pressurize liquids. Pneumatics use compressors to pressurize gases.
In an existing pneumatic application, a larger force is required to overcome increased friction in an aging component. The most likely method of obtaining a larger force is increasing the?
The easiest way to obtain a larger actuating force in both hydraulic and pneumatic systems is to increase the actuating cylinder diameter.
Fluid resistance
Energy dissipation aspect of a fluid system.
Fluid inertance
Pressure needed to accelerate a lump of gas/fluid.
Fluid impedance
Complex quantity having both a magnitude and phase angle. Impedance acts to convert changes in pressure to changes in flow rate.
