Q11 a) What is the basis for piston rod design? Explain the significance of area ratio....

Q11 a) What is the basis for piston rod design? Explain the significance of area ratio.

b) List 4 of the likely causes for slow or erratic motion of an actuator in a hydraulic equipment.

Expert Solution

Basis for piston rod design

The piston rod in a pneumatic cylinder will act as a strut when it is subjected to a compressive load or it exerts a thrust. Therefore the rod must be of sufficient diameter to prevent buckling. Euler’s strut theory is used to calculate a suitable piston rod diameter to withstand buckling.

Because of area ratio the pressure on bore end could be reduced.

Causes for slow or erratic motion of actuator

Insufficient control pressure for valves
Misadjusted or malfunctioning servo amplifier
No lubrication of machine ways or linkage
Malfunctioning feedback transducer
Worn or damaged cylinder or motor
Sticking servo valve

samet mamat answered 2 years ago

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