A typical hydraulic mobile crane
Hydraulic cranes are usually composed of a hydraulic outriggers, a boom hoist or a lift cylinders, an auxiliary and a main hoist, a hell and base section, a telescoping section, a dynamometer for the weight, a main boom, a whip line, an auxiliary hook, a hook, a hoist line and a boom extension markings.
The mechanism
The mechanism by which the hydraulic crane works is based on the movement operated by the tube that thanks to its movements influences the length of the boom. This type of cranes is utilized for any mobile functions, such as large industrial machines as well as automotive field. Even if it is characterized by a compact size, the hydraulic crane can effort a really heavy lifting power, as it happens for automated stacking cranes.
History[]
The hydraulic crane was developed during the Industrial Revolution. It was designed by William Armstrong, who projected a water powered crane, by using a fluid for the cylinder and a valve for the regulation on the basis of the load of the crane.
In 1847 Armstrong set an establishment in Newcastle for the construction of hydraulic machines suitable for cranes. In a few years the company got many orders and in the 1860s the firm was able to produce more than 100 hydraulic cranes per year.
William Armstrong provides great changes to the hydraulic cranes model, and he also introduced the hydraulic accumulator, a cylinder allowing the storage of more quantity of water and increasing the load capacity of the crane, by improving the supporting of greater pressure capacity.
Curiosity: one of the hydraulic cranes produced by that Armstrong is still located on the Venice harbour.
Truck cranes[]
Hydraulic cranes are suitable also for the truck cranes and they are able to perform heavy loaded tasks. For this reason this type of machinery is used in difficult situation for the lifting of heavy objects. The truck cranes avoid the use of large means of transport for the movement of a crane on highways.
References[]
- http://www.kalmarind.co.uk/pages/stacking-crane-automation.php
- Stacking cranes
- http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5777360&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5777360
- Books Cranes
See Also[]
Some related articles are;
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