A Hydraulic Crane : The Present Work Is Carried Out On Telescopic Crane Essay
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1.1 Telescopic crane: The present work is carried out on telescopic crane. A telescopic hydraulic crane has a boom that consists of a number of tubes fitted one inside the other. A hydraulic or other powered mechanism extends or retracts the tubes to increase or decrease the total length of the boom. It uses one or more simple machines to create mechanical advantage and thus moves loads beyond the normal capability of human. These types of booms are often used for short term construction projects rescue jobs, lifting boats in and out of the water, etc. The relative compactness of telescopic booms makes them adaptable for many mobile applications. Boom play objective role in the load lifting operation and the maximum direct effect of the stress is initializing from it and effects to another attached assemblies of crane. Sometimes this crane is truck mounted to travel on highway and eliminating the need of the special transportation for crane.
The telescopic boom is composed of a series of rectangular shaped symmetrically cross-sectional segments which are fitted with one inside the other.The boom base section is the largest segment while the boom tip section is the smallest. In between there are six sections exist in the telescopic crane boom.
There are different types of Telescopic booms which may be pinned boom, full powered boom, or a combination of both pinned boom and full powered boom. A pinned boom is one in which sections are pinned in the extended or retracted