hydraulics Flashcards
what are the o-seals made out of, temperature the state changes and what’s the new material?
fleurocarbon elastomers
melt at 300c and creates hydrogen fluoride
what are the three types of hydraulic oils and their properties & uses?
OX30: red and subs
OX40: green and 45’s, 23’s and QE class
OM33: yellow and 22’s, 42’s, and CVS
properties/purposes of hydraulic oil
lubricating, cooling, sealing, transmitting power. also not compressable
what’s demulsibility?
the ability to separate oil from water
what do antioxidants do?
stop it getting thick and sludge-like
types of hydraulic pumps?
lobe, bane, internal gear pumps, multi radial piston pump, axial piston pump
axial pump
controlled by swash plate
actuator
changes hydraulic action to mechanical motion, two types of linear (single, double)
oil drain leg
returns oil used for cooling, lubricant, and sealing
7 advantages of hydraulic over electrical counterparts
simpler, more reliable, more powerful, high torque at low speeds, easily reversed, 1:12 the size of electrical equivalent, withstands overloads
disadvantages of hydraulics
fire risk on mineral oil systems
noise
risk of contamination
less efficient
2 types of hydraulic fluid
petroleum and synthetic based
what’s rust veto used for?
used to prevent corrosion within the pipes
requirements of hydraulic fluid
transmission of power
must easily flow
must be incompressible
oil additives
anti-foam
antioxidants
anti-corrosion
demulsibility
pour point depressant
