What is the Boom of a Marine Crane? 8 Things You Need to Know

From maneuvering cargo and containers to precisely unloading ships, marine cranes are essential for efficient shipping operations.

Notably different from terrestrial cranes, marine booms feature a variety of unique components to ensure faster loading, safer operations, and increased efficiency.

Are you curious about the boom of a marine crane? Read this article to deepen your comprehensive understanding of marine crane booms.

What is a crane boom on a ship?

The crane boom is an important component of a crane, supported by the base and powered by the crane’s engine.

It is typically mounted on the deck of the ship and is operated by a crane operator.

The material is usually made of heavy-duty pressure and corrosion-resistant steel, booms are designed to lift, move, and support objects of various shapes and sizes.

To accommodate strong offshore winds and higher counterweights, crane booms are also often specially designed to improve stability.

Crane Boom On The Ship
Crane Boom On The Ship

How many types of crane boom are there?

Depending on the type of crane and different application scenarios, a crane boom has a variety of roles and appearances.

The crane boom can be divided into stiff boom, telescopic boom, folding boom and knuckle boom.

The crane’s stiff boom is low cost and easy to maintain to meet most of the work requirements, but it has few lifting points and takes up a lot of space, which is its disadvantage.

The crane with telescopic boom is very flexible and can change the length of the boom to obtain different working radius, which is very popular in the field of offshore industry and is mostly used in port and ship handling operations.

The folding boom uses multiple hydraulic cylinders to form a joint-like boom connection mechanism, which makes it faster in completing the action and more efficient in working and can work in smaller places. The folding function can avoid taking up space and is suitable for working in crowded places such as freight yards.

Folding boom crane hydraulic system pressure is higher than that of a stiff boom crane. In order to reduce the pressure of the luffing cylinder, a linkage mechanism is often used.

knuckle boom uses several hydraulic cylinders linked together in articulated sections or “knuckles” to provide increased maneuverability when lifting and placing heavy loads. This type of crane uses a jointed boom designed to fold up like fingers, giving you great maneuverability, space-saving and a larger working range.

How does crane boom work?

Crane booms are able to extend and contract as needed, making them ideal for loading cargo containers onto ship decks and performing other jobs within challenging shipping conditions.

To extend or retract a crane boom, the crane operator must use the levers located in the cab.

These levers control hydraulic cylinders, which power the elongation or shortening of the arm.

This movement is powered by pressure from hydraulics and pistons, helping to keep all operations safe and secure.

How does crane boom extend?

The crane boom extends by using pressure from hydraulics and pistons. The levers located in the cab of the crane control the different segments, or sections, of the arm.

When these levers are manipulated, hydraulic cylinders use oil pressure to extend or retract each segment.

The system works by pumping in crane hydraulic oil to drive the telescopic cylinders.

The pump generates pressure to push the piston in and out, thereby extending or retracting the various parts of the crane boom.

This movement is seamless and helps ensure all operations aboard ship decks remain safe and efficient.

Telescopic Cylinder of a Crane Boom

What is the main boom of a crane?

The main boom of a crane is the long, lever arm used for lifting or moving heavy loads. For stationary cranes, the boom usually stays at a fixed length.

However, for hired crawler and hydraulic truck cranes, the boom can be adjusted to whatever size is required for the job.

Crawler booms are composed of high-strength steel lattice struts that are easy to assemble in fixed-length sections, resulting in a lighter boom that can lift heavier loads.

Marine Lattice Boom Crane

What is the telescopic boom?

In a telescopic boom crane, the boom is divided into a main boom and a telescopic boom, which may usually have a four-section boom or a five-section boom.

The parts of the boom are hollow steel beams nested with each other. The telescopic mechanism makes the boom change its length to complete the telescopic movement.

Different boom lengths are combined with luffing cylinders to obtain a wider range of lifting heights and amplitudes.

According to the transmission mode, it is divided into three types: Hydraulic, Hydro-mechanical and Manual extension.

According to the order of scaling, there are synchronous telescoping, sequential telescoping and independent scaling.

What is boom rest?

Boom rest is a feature of many crane booms that allows the lifting section to be locked and fixed in place. This prevents swaying or swinging, allowing for more precise control when moving heavy loads.

The boom rests provide a mechanical connection between the boom arm and the main crane structure, making it stable and minimizing risks associated with shifting cargo or overloading.

Support the boom of the crane when the crane is not in operation, protecting the structure of the crane and prolonging its service life。

It can also be used to support steel tubes, beams, drills, etc.

Crane Boom Drive Mode

  • Electric drive – Low energy consumption, easy maintenance, low maintenance cost, but high construction cost
  • Hydraulic drive – Wide application and relatively low cost
  • Diesel driven – Self-sustainability without regional restrictions, smooth rotation speed prevents overloading of the work machine.

When looking for a reliable crane, you’ll want to consider the construction and design of the crane boom.

At OUCO, Our crane booms are patent-certified, offering superior performance and stability.

Our experienced team can assist in designing the right boom based on your needs. Get in touch with us today to find out more about our selection of crane booms!


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Introduction and Maintenance of Container Lifting Spreader

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