Mechanical engineering EAT309 - DESIGN Hydraulic Cutting Equipment for the Electra-Hydraulic Power Pack

Mechanical engineering EAT309 - DESIGN Hydraulic Cutting Equipment for the Electra-Hydraulic Power Pack MW PLEASE READ ALL OF THE FOLLOWING VERY CAREFULLY In 2010 our company designed and manufactured a very successful product in the form of an easily transportable power pack, capable of providing electrical and hydraulic power for use by aid agencies at disaster sites around the world. The main application of unit was to provide electrical power for lighting and medical support systems and hydraulic power to drive essential lifting equipment and cutting gear. in subsequent years the unit has undergone successful upgrades, the most recent of which has produced an increase in the hydraulic power available from the unit. Feedback from oW customers has indicated that as a consequence the performance of the currently supplied, he”: vii proprietary hydraulic cutting equipment falls significantly short of the hydraulic capability of miré the unit. The Technical Director and Finance Director have since decided that we have no choice but to explore the possibility of designing and supplying our own cutting equipment. A market survey of some of the proprietary equipment available has informed some initial details. The general design is to follow a conventional ‘shears’ type arrangement employing two blades which are to be powered by two identical hydraulic cylinders. A schematic of the arrangement with principal dimensions is shown in figure 1 below. In the closed position i there needs to be a 4° overlap of the blades in the closed position and the angle between 3 the blades when the shears are in the fully open position is 120°. To reduce costs'and I l minimise the variation in spare parts needed to support the design it has been decided that I exactiy the same sized hydraulic cylinder is to be used for each blade. This means that each blade will travel through an arc of 62° from the fully open to the fully closed position. Based upon information received from customers and after initial tests in the development laboratory it has been found that the shears should be capable of exerting a force of 7.5 kN at the mid-point of the blades when the shears are in the fully open position. To avoid the risk of accidental damage to any personnel or equipment it has been determined that the angular velocity of the blades as they close must not be any more than 2 revolutions per minute about the pivot point. Similarly, when opening the blade velocity must not exceed 15 revolutions per minute. Flow control devices will need to be incorporated into ‘i the unit to accommodate this. 1 To prevent over pressuring the hydraulic shears it will also be necessary to include within the unit a valve which limits the working pressure to 85bar. PLACE THIS ORDER OR A SIMILAR ORDER WITH US TODAY AND GET AN AMAZING DISCOUNT :)