Support and Walking Systems: The Cost of Flexibility
RTGs utilize multiple sets of heavy-duty pneumatic rubber tires as their walking mechanism, granting them unparalleled mobility but limiting their span and ground requirements. Compared to RMGs' steel wheels and rails, RTG tires allow for 90-degree steering, enabling the equipment to move between different storage areas. However, this also leads to tire wear and the need for frequent lane corrections. Modern RTGs typically feature hydraulic suspension systems and GPS/magnetic nail navigation technology to ensure straight-line travel.
Evolution of Power Systems: From Diesel Roar to Green Quiet
Traditional diesel drive is being rapidly phased out, with pure electric drive, represented by lithium batteries and hydrogen fuel cell, becoming a core indicator for RTG technology upgrades by 2025. As shown in the table below, the power system transformation directly determines the equipment's environmental performance and total lifecycle cost:
| Power Types | Carbon emissions | Range |
Conventional Diesel-Electric |
High | Depends on fuel tank |
Cable Reel/Conductor Line |
Low | Unlimited |
High-Capacity Lithium Iron Phosphate |
Low | 10 hour under full load |
| Hydrogen Fuel Cell | Low | Stores 135kg of hydrogen |
Breakthrough in Positioning and Sensing Technology
In the past, RTGs (Remotely Rotary Gear) systems struggled to achieve high-precision automation due to tire deformation and unpredictable travel paths. Now, the combination of differential GPS and high-precision maps has improved the positioning accuracy of RTGs to the centimeter level. The automated RTG delivered by Yuntian Offshore Engineering to Ningbo-Zhoushan Port demonstrates that, through a high-precision differential positioning system, even during tire-based movement, the positioning accuracy of both large and small vehicles has approached the level of fixed-track RTGs.
For RMG/RTG equipment selection analysis, automation upgrade solutions, or ROI calculations tailored to your terminal's specific needs, please contact us through the following methods. Our port machinery technical team has over 15 years of industry experience and has provided customized solutions for ports in 23 countries and regions worldwide.
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