The truck given above can carry 50 tons and its center of mass is at the interse
ID: 1842062 • Letter: T
Question
The truck given above can carry 50 tons and its center of mass is at the intersection point A and B. Casing of the truck is 10 tons and its center of gravity is at the intersection of A and C.A = 4m, B = 5m, C = 3m vertical distance between intersection of AB and BC is 1 meter. Casing can rotate backward at the intersection point of B and C (pin joint.) Truck can lift casing to the vertical position in 20 seconds from the horizontal. Piston is attached to the truck at the intersection of (A and B) and (A and C) by two pin joints each (one piston for this side and there is another one on the other side). Make necessary assumption. What type of pump would you choose, what is your operating pressure? What is the stroke of the piston? What is the maximum force that the piston has to overcome? What is your piston diameter? What is the diameter of the piston rod, do you need to make a buckling check, why? What is your hydraulic flow rate in average? What is the power that the pump draws from the engine when it operates at 1800 rpm? Design the whole hydraulic system and label them individually?Explanation / Answer
a) hydraulic pump: pressure able to handle 50 tons acting at angle ABC = arcsin(1/4)=12.5 tons. Usually about 2500 psi max is used.
b)stroke of piston : at vertical posn AB = 5.83m, initial 4m,stroke=1.83 m
c)maxm force : at start position:
d)piston dia: pressure*dia=force, for 2500 psi and 12.5 tons comes to 3.8 inch
e) dia of rod can use 3inch
f) buckling check-for such short stroke not needed, but can do : MUST KNOW MATERIAL PARAMETERS
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.