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# Design a hydraulic system to safely lift a 200kg mass through a vertical height of 1 meter in a time of 2 seconds. Assume a working pressure of 10 MPa. What you should calculate: 1. Determine the dime

Design a hydraulic system to safely lift a 200kg mass through a vertical height of 1 meter in a time of 2 seconds. Assume a working pressure of 10 MPa.

What you should calculate:

1. Determine the dimension of the hydraulic cylinder. Assume a load of 20 kN is moved on the forward stroke

The diameter of hydraulic cylinder is usually supplied in standard sizes available in increments of 5 or 10 mm. You are going to use the piston diameter of 55 mm.

2. Diameter of the piston rod.

Assume modulus of elasticity of 207GPa for the material of the rod, safety factor of 2 (therefore design load = 40000N) and an equivalent free length equal to the stroke length (pinned at both ends).

Use Eulerâ€™s equation below to calculate the rod diameter:

Where D=rod diameter

L = length of ram

E = modulus of elasticity

K = design load

3. Flow rate of hydraulic fluid:

You have to determine first the volume of cylinder at full extension by using the formula:

Volume = Area x stroke length(mm).

(Remember a full stroke length of the piston takes 2 seconds)