Offshore floating crane slewing support

The slewing support of the offshore floating crane is connected to the fixed part of the floating crane (such as the hull or foundation column) through the inner ring, and to the rotatable part (such as the turntable) through the outer ring. Under the action of the driving device, the outer ring rotates relative to the inner ring, achieving a 360 degree rotation of the upper structure of the floating crane, allowing the floating crane to perform lifting operations in different directions. By rolling the rolling elements in the raceway, friction resistance is reduced, ensuring the smoothness and flexibility of the rotation.

Diameter size: ranging from a few meters to 18 meters or even larger, such as the slewing bearing diameter of 18 meters for a 3500 ton crane.
Bearing capacity: Depending on the lifting tonnage of the floating crane, it generally ranges from several hundred tons to several thousand tons to meet the needs of different offshore lifting tasks.
Accuracy level: It is usually required to achieve a high accuracy level, such as P5 or higher, to ensure the positioning accuracy and turning stability during floating crane operations.
Rotational speed: generally low, usually ranging from several to tens of revolutions per minute, depending on the working requirements and actual working conditions of the floating crane.

Material: The ring and rolling elements are made of high-strength, high toughness, and seawater corrosion-resistant alloy steel, such as chromium nickel molybdenum alloy steel, and undergo special heat treatment and surface treatment processes; The retaining frame is generally made of copper alloy or high-strength plastic with good wear resistance and corrosion resistance.
Manufacturing process: It requires multiple precision machining processes such as forging, turning, grinding, heat treatment, and surface treatment, as well as strict quality inspection, including dimensional accuracy, form and position tolerances, hardness, surface quality, internal structure, and other aspects.

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