Terms1
A container for the storage of the liquid used in a fluid power system.
Reservoir
Atmospheric Pressure at sea level is what?
14.7 psi
What is Pascals Law?
F=PxA
(also called an actuator) – A device which converts fluid power into mechanical power in the form of linear motion.
Cylinder
Name the three basic parts of a hydraulic cylinder
Barrel, Piston, Rod
A pressure operated valve that opens at a predetermined pressure to protect component(s) in a hydraulic system or circuit from high pressure.
Relief Valve
Electrical motor, Diesel engine, or gas engines in some instances are examples of what in a Hydraulic system?s
Prime Movers
How do I find Pressure if I have Force and Area?
P=F/A
A valve which permits flow of fluid in one direction only.
Check Valve
False
(In Hydraulics) – The force developed from a resistance to oil flow.
Pressure
Oil takes the path of least?
Resistance
Diameter is the radius doubled. True or False?
True
A device which converts mechanical power into fluid power in the form of fluid flow.
Hydraulic Pump
Name two kinds of pumps we took apart in lab
Piston and gear
Pump capable of changing its output without an input speed change.
Variable Displacement Pump
Fluid that is under pressure and in motion.
Hydraulic Energy
I have a pressure of 2,000 PSI and a diameter of a piston of 5 inches. What is my Force?
39,270
A valve used to direct the oil to a specific area or function to do work
Control Valve
On an adjustable relief, what tools do we use to adjust it?
Open end wrench for the locknut and typically an allen/hex key for the screw.
Hydraulic system that requires that there be no flow through the control valve when it is in neutral. Usually referred to as a constant pressure system with varying flows.
Closed-Center System
Fluid pressure is only on one area rather than equal in all areas of a confined space. True or False?
False
What is the formula to find the area of a circle?
pir^2
Pump whose output only varies with rpm. Can only vary its output when the input speed varies.
Fixed Displacement Pump
In a piston pump, there are 9 pistons that spin. What do the slippers ride against?
Swash Plate
What is a designed restricted passage in a hydraulic circuit. Usually a small drilled hole to limit flow or to create a pressure differential in a circuit.
Orifice
When fluid passes through a restriction, what is generated?
Heat
I have a radius of 1.75 and a force of 33,000, what is my pressure?
Pressure = 3430
Hydraulic system that requires pump flow to pass freely to the reservoir through the center of the control valve when it is in neutral. Usually referred to as a constant flow system with varying pressures.
Open-Center System
How do we measure fluid flow in a hydraulic system? What is the value?
Flow meter, gallons per minute