One can find cranes in a fairly large range of types and shapes nowadays. One of the most used ones is a telescopic boom crane. These cranes are mobile, which means they are attached to various vehicles as superstructures and they can move from one place to another without any additional help. Due to the fact that these cranes are additionally equipped with devices that allow height adjustment, the problems related to the height become irrelevant.
One of the main differences between conventional cranes, such as bridge cranes, and telescopic boom cranes, is that the latter consists of tubes that are inserted into one another. Hydraulic system, however, ensures that the telescope is pulled out and retracted. The hydraulic controls and the system must, therefore, be well designed for a proper operation.
The thesis describes the design of the hydraulically controlled cylinder of the telescopic boom. First, we examined the condition of the hydraulic systems of telescopic boom cranes and some patents that would come handy at solving our problem. Second, we showed what our starting point of developing the hydraulic cylinder was and what problems we encountered during the development itself. We will show our final solution of the problem and what results we obtain with numerical calculations of the hydraulic cylinder.
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