Question

It is about hydraulic system design. Please do a and b.

A Hvdraulic Svstem Design A hydraulic-lift table is used to raise a 1506-kg crate It consists of a platform and two identical linkages on which hydraulic cylinders exert equal forces. (Only one linkage and one cylinder are shown.) Members EDB and CG are each of length 2a, and member AD is pinned to the midpoint of EDB. If the crate is placed on the table, so that half of its weight is supported by the system shown, determine the force exerted by each cylinder in raising the crate from 0-30° to 60° within 2 seconds, a-0.80 m, and L-3.00 m. Give any reasonable value for d, which is up to you. a) Determine the pump, motor and hydraulic cylinder specs (motor power, pump type, flow rate, minimum cylinder piston diameter, minimum rod diameter, maximum stroke length) Note: There is more unknown parameters then the known ones. You can select one parameter in a reasonable range by searching online catalogues that is up to you, then you can calculate the rest of the parameters. When determining the motor power, neglect the losses in the hydraulic circuit for this homework (you can make a decision for a factor of safety b) Draw the hydraulic circuit for all necessary elements for this system considering to hold the load at any height.

Answer 1

Consides A hydaaulic toble is used to STaise C. Cole-c

Blac.ccse 11 _ LF β( 1 2asinaj- DH Sint ananle o D H DH

DH 211 从e force eズe27ted by each cylinder , E sine he eserked bjeach cylindr 1 s