Definition
A motor davit crane is driven by an electric motor or with an electric winch to provide power for lifting and landing the boom and rotating it to transfer goods, load, and unload.
The crane's fixed arm allows it to handle materials more stably and safely in unstable offshore winds. Its considerable lifting weight and small volume allow it to transfer materials in the harsh marine environment. Its structure is not very complex, easy to maintain, low cost, and has a long service life.
Products Detail
Structural Components of the Fixed Arm
The fixed arm is typically composed of the following key components, which work together to achieve stable lifting and handling:
1. Main Boom
- Low-alloy high-strength steel
- The arm length is designed according to actual needs, and the end is equipped with a hook
2. Support and Connection System
- connected to the ship's deck by bolts or welding.
- Slewing Mechanism: Some fixed arms have a horizontal slewing device (such as a slewing bearing), allowing the boom to rotate within a specific angle range (e.g., ±180°) to expand the operating range. Still, the boom itself does not have a pitching function.
3. Power Transmission Components
- Electric Winch/Hoist: Installed at the root of the boom or near the base, connected to the hook via a steel wire rope to provide vertical lifting power.
Cables and Control System: Built-in power and signal cables connect the motor to the control system, enabling remote control or automated operation.
Feature
- Large lifting weight
- Lightweight
- Be flexible and efficient
- Low cost
- Small space
- It can obtain the certification of multinational classification societies
- OEM and ODM accept
- Easy to operate
Options
- Driver system
- Operating system
- Lifting angle
- Rotating angle
- Crane surface coating
- Length of boom and lifting capacity
- Classification society
- Overload protection
- Explosion protection system
Advantages of the Davit Crane's Boom
1. Priority on Stability
- In dynamic environments such as ship swaying and wave impacts, the rigid structure of the fixed arm can effectively suppress vibrations, avoiding collision or unhooking risks of lifted items (such as lifeboats) due to shaking. This is particularly suitable for emergency rescue scenarios (e.g., rapid lowering of lifeboats).
2. High Space Efficiency
- The boom does not require pitching or telescoping. It occupies minimal deck space, making the motor davit crane suitable for small and medium-sized vessels or platforms with compact deck layouts.
- The fixed installation reduces the need to store movable components, allowing them to remain in a standby state for long periods and improving emergency response speed.
3. Strong Environmental Adaptability
- Suitable for marine corrosion environments with high salt fog and humidity. The service life of the structure is extended through surface anti-corrosion treatments (such as hot-dip galvanizing and epoxy coating) and material corrosion resistance optimization.
- In ice zones or harsh sea conditions, the reliability of the fixed arm is superior to boom types relying on hydraulic or complex mechanical drives.
Typical Application Scenarios
1. Marine Life-saving Systems
- As a lifeboat davit crane, the fixed arm can quickly lower and recover lifeboats and liferafts, meeting safety regulations such as the SOLAS Convention. It is particularly suitable for passenger, cargo, and offshore operation platforms.
2. Offshore Material Handling
- In scenarios such as oil platforms and offshore wind installation vessels, it is used to lift equipment components, tools, or small containers. It achieves precise loading and unloading with ship positioning systems (e.g., DP dynamic positioning).
3. Special Operation Support
- Used for carrying underwater equipment (such as ROV remotely operated vehicles) or fire-fighting equipment, the fixed arm's stable characteristics ensure that the equipment maintains a controllable posture during lowering.
Contact
The fixed arm structure of motor davit cranes boasts core advantages such as "stability, reliability, and ease of maintenance." Thanks to the use of high-strength materials, wind-resistant design, and simple layout, it has become an ideal choice for safe lifting operations in marine environments.
YFM Fixed Boom motor davit crane
The technical characteristics of YFM Motor Davit Crane are particularly suitable for scenarios with extremely high stability requirements, such as ship lifesaving and offshore material transportation. Meanwhile, it balances cost-effectiveness and long service life, making it one of the classic mechanical structures in the field of marine engineering.
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