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Crane and Efficiency increase of cranes

Views: 0     Author: Site Editor     Publish Time: 2023-04-06      Origin: Site

A crane is a machine usually equipped with hoisting ropes, wire ropes or chains and pulleys, which is used both to raise and lower materials and to move them horizontally.It is mainly used for lifting heavy objects and transporting them to other places.The device uses one or more simple machines to create a mechanical advantage that moves loads beyond a human's normal ability.Cranes are commonly used to load and unload goods in transportation, construction for material movement, and assembly and manufacturing of heavy equipment. Crane

The first known crane was the shaduf, a water-lifting device that was invented in ancient Mesopotamia (modern-day Iraq) and then appeared in ancient Egyptian technology.Construction cranes later appeared in ancient Greece and were powered by humans or animals (such as donkeys) and used to construct buildings.Larger cranes were later developed in the Roman Empire, using human treaded wheels, which could lift heavier weights.During the High Middle Ages,harbor cranes were introduced to load and unload ships and assist in construction some built in stone towers for added strength and stability.The earliest cranes were built of wood, but with the advent of the Industrial Revolution, cast iron, steel and steel took over.For many centuries electricity was provided by the physical exertion of man or animal, although the cranes in watermills and windmills could be driven by harnessed natural power.The earliest mechanical power was provided by steam engines, the first steam cranes were introduced in the 18th or 19th century, and many remained in use until the late 20th century.Modern cranes typically use internal combustion engines or electric motors and hydraulic systems to provide greater lifting capacity than previously possible, although hand cranes are still used where providing power is not economical.There are many different types of cranes, each suitable for a specific purpose.Sizes range from the smallest jib cranes, used in workshops, to the tallest tower cranes used in the construction of high-rise buildings. Micro cranes are also used in the construction of tall buildings, facilitating construction by reaching tight spaces.Large floating cranes are generally used to build oil drilling platforms and salvage sunken ships.Some lifting machinery does not strictly meet the above definition of cranes, but is generally referred to as cranes, such as stackers and truck cranes.

Efficiency increase of cranes

Lifetime of existing cranes made of welded metal structures can often be extended for many years by aftertreatment of welds.During development of cranes, load level (lifting load) can be significantly increased by taking into account the IIW recommendations, leading in most cases to an increase of the permissible lifting load and thus to an efficiency increase.

Similar machines

The generally accepted definition of a crane is a machine that lifts and moves heavy objects by means of ropes or cables suspended from a movable arm.Therefore, lifting machinery that does not use cables or provides only vertical rather than horizontal movement cannot strictly be called a "crane".

Types of crane lifting machinery include:

  • Interceptions and tackles

  • Winch (Nautical)

  • Hoist (device)

  • Winch

  • Windlass

  • Cherry picker

Regardless of the official definition of the term, more technically advanced lifting machinery of this type are often referred to as "cranes."

Crane operator:

Crane operators are skilled workers and heavy equipment operators.

The key skills required of a crane operator include:

  • Learn how to use and maintain machines and tools

  • Good teamwork skills

  • Attention to details

  • Good spatial awareness.

  • Patience and ability to remain calm in stressful situations.

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