How Hydraulic Cranes Work
Hydraulic cranes may use a simple design, but they are highly effective pieces of heavy equipment that can take on a wide assortment of jobs that would otherwise be impossible. By using special fluid, they are able to distribute thousands of pounds worth of weight at one time. They can even lift objects that weigh several tons with no problem so it can be fascinating to watch them in action. However, not all are created equal as there are many different types and each one has a different lifting capacity.
Hydraulic cranes use a system of hydraulics which uses special fluids to transmission forces from one point to another. These fluids are typically incompressible, in other words, at their maximum density. Most of the time this fluid is simply regular oil. The machines essentially work by using a piston to press down on the oil which then transmits the force to another piston, which is then driven up. So basically when one piston goes down another is raised. The pressure that moves these pistons is created using one of two different types of pumps, a gear pump and a variable displacement pump.
Of course, in order to truly understand how hydraulic cranes work, you must first know the different parts that are required for them to lift such heavy loads. Most models include the following parts: boom, rotex gear, jib, outriggers, counterweights, reinforced steel cable, and a hook. The boom is the part of the machine that is the easiest to recognize as it is the large steel crane that is responsible for carrying the load. It is common for the boom top to have a few telescoping sections. Some, like the Cambellhowe jib cranes, are outfitted with a jib which is located at the end of the boom and is a lattice like structure.
Hydraulic cranes would be nothing without the rotex gear which is located underneath of the cab and gives it the ability to swivel in all directions. In order to operate it, a pedal is located in the cab which is foot operated. In order to prevent people from becoming injured, these gears are protected in a protective metal cover. Outriggers are often used to add stability to the vehicle which the tires alone cannot provide. They use hydraulics as well in order to lift the entire vehicle off the ground, including the tires, especially in the case of hydraulic truck cranes. In order to provide extra stability, counterweights may be used as well.
The crane itself is operated in a manual fashion by a joystick and a set of foot pedals. These controls are located in the cab which is located on the top of the vehicle’s deck. When purchasing hydraulic cranes, it is important to find a trustworthy dealership that is located close to you so you can take it back periodically for maintenance.
