There are many crane models on the market, designed and produced by well-known manufacturers. From small and compact cranes to large tower or crawler cranes, there is specific crane model for every lifting operation. One crane category that has been heavily used over the past few years is the mobile crane category. This category is generally presented by the crane trucks. The crane trucks are actually special truck vehicles with a crane part attached on them. These lifting machines come in variety of forms and sizes, and are used for different lifting tasks. Versatile, mobile and extremely flexible, the crane trucks can do a lot of things on the construction site. They are quite popular among the construction companies around the world. Furthermore, the crane trucks can work in narrow and tight spaces where larger lifting equipment cannot be used.
The modern crane trucks can easily lift and move different heavy weight items from one location to another thanks to their advanced hydraulic system. With the hydraulic system, the lifting operations are based on the Pascal principle fluid-pressure transmission. The Pascal law states that “The pressure exerted anywhere in a confined fluid is transmitted equally in all directions through the fluid, keeping the pressure level the same”. In a hydraulic system, the force which is applied directly in one cylinder is transferred to another cylinder by using high pressure fluid in form of oil. The cylinders in the crane trucks have pistons. Usually, there is one piston in every cylinder. The pistons are connected together via fluid filled pipe. When a physical energy is applied on one piston, the other piston is pushed in a upward motion as a result of the force which is transmitted by the oil.
The crane trucks use one or two hydraulic pumps for the lifting operations: two gear or one gear hydraulic pump. Most crane trucks that can be found on the market use two gear hydraulic pumps to multiply the hydraulic pressure which is created by the machine. The two gear pump has three main components: a main pump, steering pump, and pressure counterweight pump. The main pump has the power to lower and to raise the boom of the crane trucks. It is also responsible to lift more weight when compared with the other parts of the hydraulic system.
Thanks to the hydraulic systems, the crane trucks are described as powerful lifting machines which can perform heavy-duty lifting tasks quickly and easily. As said above, the lifting procedure involves using fluid in form of oil for producing enormous force. This force allows the crane trucks to lift heavy items- it is as simple as that!
The modern crane trucks can easily lift and move different heavy weight items from one location to another thanks to their advanced hydraulic system. With the hydraulic system, the lifting operations are based on the Pascal principle fluid-pressure transmission. The Pascal law states that “The pressure exerted anywhere in a confined fluid is transmitted equally in all directions through the fluid, keeping the pressure level the same”. In a hydraulic system, the force which is applied directly in one cylinder is transferred to another cylinder by using high pressure fluid in form of oil. The cylinders in the crane trucks have pistons. Usually, there is one piston in every cylinder. The pistons are connected together via fluid filled pipe. When a physical energy is applied on one piston, the other piston is pushed in a upward motion as a result of the force which is transmitted by the oil.
The crane trucks use one or two hydraulic pumps for the lifting operations: two gear or one gear hydraulic pump. Most crane trucks that can be found on the market use two gear hydraulic pumps to multiply the hydraulic pressure which is created by the machine. The two gear pump has three main components: a main pump, steering pump, and pressure counterweight pump. The main pump has the power to lower and to raise the boom of the crane trucks. It is also responsible to lift more weight when compared with the other parts of the hydraulic system.
Thanks to the hydraulic systems, the crane trucks are described as powerful lifting machines which can perform heavy-duty lifting tasks quickly and easily. As said above, the lifting procedure involves using fluid in form of oil for producing enormous force. This force allows the crane trucks to lift heavy items- it is as simple as that!