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Ships and Marine Equipment
Ships and offshore engineering equipment are critical infrastructure for developing marine resources, ensuring maritime transport, and safeguarding maritime rights and interests. They are widely used in energy development, national defense, logistics, and other fields. Ships and offshore engineering equipment are essential tools for humanity's exploration, development, and utilization of marine resources, playing an irreplaceable role in energy development, international trade, national defense, and marine research.
In the maritime transport sector, various specialized vessels form the arteries of trade. Container ships and bulk carriers carry over 90% of global cargo transportation, while specialized vessels such as tankers and chemical tankers ensure the safe transportation of energy and chemical products. Offshore engineering equipment is a powerful tool for developing marine resources. From shallow to deep waters, offshore engineering facilities such as drilling platforms and production platforms are constantly pushing the limits of operating depths, enabling the development of oil and gas resources.
Specialized operation vessels demonstrate unique value in specific sectors. Research vessels equipped with advanced equipment such as sonar and ROVs facilitate deep-sea exploration and polar expeditions; engineering vessels complete complex operations such as submarine pipeline laying and port dredging; and various types of engineering support vessels provide comprehensive support for offshore construction.
In the field of marine and offshore engineering equipment, the shaft-and-rudder system fulfills the dual missions of power transmission and navigation control. As the core transmission mechanism connecting the main engine and propeller, and a crucial control system for ship maneuvering, the performance of the shaft-and-rudder system directly determines the maneuverability, reliability, and energy efficiency of the entire vessel.
In terms of power transmission, the main shaft system efficiently transmits the enormous torque generated by the main engine to the propeller. Regarding maneuverability, the rudder system achieves precise rudder angle control to adjust the ship's heading, enabling large container ships to maintain a heading accuracy of ±1° even under fully loaded conditions. Regarding safety, the shaft system is equipped with multiple bearing supports and a vibration monitoring system to ensure stable power transmission. The rudder system also features an emergency backup mechanism to maintain basic maneuverability in the event of a main system failure.
The operating principle of the shaft-and-rudder system embodies sophisticated mechanical engineering. The main shaft system utilizes a multi-point support structure. Through the precise coordination of components such as the intermediate shaft and thrust shaft, main engine power loss is limited to less than 3%. The propeller shaft is connected to the propeller hub using conical hydraulic assembly technology, ensuring a reliable connection even under maximum operating conditions. The rudder system utilizes a hydraulic servo control principle, with the steering gear driving the rudder blades. Modern electro-hydraulic servo systems have reduced response times to less than 2 seconds, with rudder angle control accuracy reaching 0.1°. During power transmission, the shafting bearings utilize a forced lubrication system to create a stable oil film, achieving a friction coefficient as low as 0.001, significantly reducing transmission losses.
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