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- fileName "Hydraulics"
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- What is hydraulics
- The application of the properties of liquid at rest and in motion
Where does the word hydraulics come from
Two Greek words hydro meaning water or fluid and aulis meaning a tube or pipe
What is hydraulic actuators
The component of the system that does the work
What is it called when you input a small force to fluid but can obtain a large output force
What are the 2 ways power can be transmitted
Linear or rotary
What is an advantage if hydraulics over mechanical
Virtually no time lag exists
what are some disadvantages of hydraulics
foods must be confined, system must you strong pipes in containers , system must be controlled
what is the principle of hydraulics
pressure applied to a confined fluid is transmitted undiminished and in all directions and acts with equal force on equal areas at right angles to them
what is force
anything which tends to produce or modify motion first can be pushed or pulled and is generally measured as a unit of weight most commonly being pounds
what is area
the measurement of a bounded region or plane, or the surface of a solid. Who will be expressed in square inches
what is pressure
force applied to a unit area. A resistance to flow and is normally expressed in pounds per square inch
what is resistance
any force which stops or retards the movement of a body. resistance to the movement of a solid could be such as fiction or inertia
what is psig
gauge pressure. the pressure reading does not take into account atmospheric pressure
what is psia
absolute pressure. pressure that is equal to the gauge pressure plus atmospheric pressure
what is energy
the ability or capacity to do work
what are the 2 forms of energy
- potential energy which is referred to as stored energy, which is present in a hydraulic system in the form of pressure.
- kinetic energy referred to as energy in motion, which is a present in a hydraulic system in the form of flow
What type of valve is the simplest got a directional control valve
How should a gravity valve be mounted
what kind of valve is used to maintain control over a vertical cylinder so that it will not fall freely because of gravity
what kind of valve is used to prevent or control a motor with a load from running away. It is directly and remotely operated at the same time, but not at the same place in the valves
how will you ever be able to tell if the system has a problem if you don't know how the system is supposed to work
find out as much as possible about the malfunction, never disassemble any component unless you are sure that it is at fault
what is the number 1 enemy of hydraulic systems
dirt or contaminants
what should you always do before adding hydraulic fluid to the system
what are the 3 major groups to help simplify the troubleshooting process
energy group, mechanical group, fluid group
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