- Dec 24, 2024
- News
Rubber Tyred Gantry Crane: Parts, Function and Specification
A rubber tyred gantry (RTG) crane is a mobile gantry crane equipped with rubber tires, allowing it to move within a terminal without the need for fixed rails. This mobility facilitates container handling operations in ports and intermodal yards.
Tire Gantry Crane is an important lifting equipment in ports, terminals and container yards, this kind of cranes use tires to move, do not rely on the track, so it is more flexible. This article focuses on the components, functions and specifications of tire cranes.
Parts of a Rubber Tyred Gantry Crane
RTG cranes are sophisticated machines composed of several key components, each contributing to their functionality.
1. Frame Structure
Constructed from high-strength steel, the frame structure comprises the main girder and supporting legs, designed to withstand substantial loads and dynamic forces during operations. The robust construction ensures durability and stability, even under challenging environmental conditions.
2. Hoist Mechanism
The hoist mechanism consists of a high-power electric motor, wire ropes, drums, and a pulley system, enabling precise lifting and lowering of containers. Designed for heavy-duty operations, it typically handles loads ranging from 40 to 60 tons, ensuring efficient and safe material handling.
3. Trolley
Mounted on rails atop the main girder, the trolley moves horizontally to position the hoist accurately over containers. Equipped with advanced control systems, it ensures smooth and precise operations, contributing to the crane's overall efficiency.
4. Rubber Tires
The crane's mobility is facilitated by large, durable rubber tires, allowing it to traverse the yard without the constraints of fixed rails. This flexibility enables efficient space utilization and adaptability to various operational layouts.
5. Control System
The control system features an ergonomically designed operator cabin equipped with state-of-the-art electronic panels, joysticks, and display monitors. Advanced automation and safety features, such as anti-sway technology and load monitoring, enhance operational precision and safety.
6. Power Supply
RTG cranes can be powered by diesel engines, hybrid systems, or fully electric options. While diesel engines offer independence from electrical infrastructure, they contribute to higher emissions. Hybrid and electric systems provide environmentally friendly alternatives, reducing operational costs and aligning with sustainable practices.
7. Anti-Sway System
The anti-sway system employs advanced sensors and control algorithms to minimize the pendulum effect during container handling. By stabilizing the load, it enhances safety, reduces cycle times, and improves overall operational efficiency.
Function of Rubber Tyred Gantry Cranes
RTG cranes are integral to container handling operations, offering high-flexibility and productivity. For instance, they can stack containers up to 1-over-6 high and span across multiple lanes, optimizing yard space. Their mobility allows transfer of containers between different transport modes, enhancing throughput in busy terminals.
1. Container Stacking
RTG cranes are primarily used for stacking containers in storage yards. They can stack containers up to 5-8 high, depending on the crane's design.
2. Intermodal Transfers
RTGs facilitate the transfer of containers between different modes of transport, such as trucks, trains, and ships.
3. Mobility Across Terminals
Unlike rail-mounted gantry cranes, RTGs can move freely within the terminal, making them versatile and adaptable to various operational layouts.
4. Cost Efficiency
By optimizing yard space and reducing reliance on manual labor, RTGs contribute to cost-effective terminal operations.
Specifications of Rubber Tyred Gantry Cranes
RTG crane specifications vary depending on the manufacturer and application. Below are some standard specifications:
| Specification | Details |
|---|---|
| Lifting Capacity | Typically ranges from 20 to 40 tons. |
| Span | Can cover 5–8 container rows plus a truck lane. |
| Height | Stacks containers 5-8 high, depending on the design. |
| Power Source | Diesel, electric, or hybrid systems. |
| Travel Speed | Up to 100 meters per minute when unloaded. |
| Operational Modes | Manual, semi-automated, or fully automated. |
Advantages of Rubber Tyred Gantry Cranes
RTG cranes offer numerous benefits that make them indispensable in modern terminals:
- Flexibility: The ability to move freely across the terminal provides unmatched operational flexibility.
- Space Optimization: High stacking capability maximizes yard space utilization.
- Reduced Emissions: Electric and hybrid RTGs contribute to environmentally friendly operations.
- Enhanced Safety: Features like anti-sway systems and automated controls improve safety.
Challenges and Maintenance of RTG Cranes
While RTG cranes are highly efficient, they also come with challenges:
1. Maintenance Requirements
- Challenge: Regular maintenance is essential to ensure performance and safety.
- Solution: Implementing a preventive maintenance schedule can reduce downtime.
2. High Initial Costs
- Challenge: The initial investment in RTGs is significant.
- Solution: Focus on long-term operational savings to justify the investment.
Conclusion
Tire gantry cranes are important equipment for efficient handling of containers in ports and terminals. These cranes are characterized by their rigid structure, flexible operation, and freedom of movement on the ground, which reduces the expenditure on laying tracks.
