Lda Type Electric Overhead Crane

TECHNICAL DATA SHEET EXAMPLE

Model: LDA-10t/16.5m A3

Capacity: 10 metric tons

Span: 16.5 meters

Lifting Height: 12 meters (standard)

Hoist Speed: 8 m/min (single speed)

Crane Travel Speed: 30 m/min

Hoist Travel Speed: 20 m/min

Work Duty: A3 (light duty, ~60 starts/hour)

Control: Pendant push-button, 6-button

Motor Power: Hoist 13kW, Crane travel 2x1.5kW, Hoist travel 0.8kW

Power Supply: 380V, 3-phase, 50Hz

Ambient Temperature: -10°C to +40°C

Relative Humidity: ≤85%

An LDA Type Electric Overhead Crane consists of several key components that work together to ensure the crane operates smoothly and efficiently. Below is a breakdown of the main components:

1. Bridge (Main Beam)

Function: The bridge is the main horizontal structure that spans the width of the workspace. It allows the crane to move across a defined area and supports the other components like the trolley and hoist.

Structure: Usually made from steel beams, it is designed to carry the load of the hoist, trolley, and the materials being lifted.

Types: In an LDA crane, the bridge is typically a single girder design, meaning there is one main beam across the length of the crane. This makes it more cost-effective for lighter to medium loads.

2. Trolley (Traveling Mechanism)

Function: The trolley moves horizontally along the bridge, carrying the hoist and the load. It enables precise movement of materials from one end of the crane to the other.

Structure: It typically runs on rails mounted on the bridge, powered by an electric motor. The trolley moves across the span of the bridge.

Motor: The trolley motor controls the speed and direction of the trolley's movement.

3. Hoist (Lifting Mechanism)

Function: The hoist is the mechanism that actually lifts and lowers the load. It consists of a drum, ropes or chains, and a hook.

Types: It can be a chain hoist (for lighter loads) or a wire rope hoist (for heavier loads).

Movement: The hoist moves vertically along the bridge using a hoist trolley. It lifts the load by winding or unwinding a rope or chain.

4. End Carriages (End Beams)

Function: These are the supporting structures at both ends of the crane bridge. They allow the crane to move along the rails or tracks mounted on the building's structure.

Structure: Each end carriage is equipped with wheels that run along the crane track. The wheels are driven by electric motors.

Movement: The end carriages enable the crane to travel along the length of the building or workspace.

5. Electric Motors

Function: The motors are responsible for powering the movement of the crane's various components, including the hoist, trolley, and bridge.

Control: These motors are typically controlled by a control system that allows for variable speed and precise control of the crane's movements.

Types: They can be DC (Direct Current) motors or AC (Alternating Current) motors depending on the design and the crane's power requirements.

 

6. Control System

Function: The control system is the heart of the crane's operation, allowing the operator to manage the movement of the crane and hoist.

Control Types: It can be controlled manually via a pendant controller, which is a wired or wireless remote control, or by a cab located on the crane. In some systems, automated control can also be implemented for more advanced operations.

Safety Features: The control system typically includes features such as emergency stop buttons, overload protection, and limit switches to ensure safe operation.

7. Track or Rail System

Function: The track or rail system is where the crane moves horizontally along the workspace. It's installed on the building's ceiling or an elevated structure.

Components: The track system consists of steel rails or I-beams that guide the end carriages and provide a smooth path for the crane's movement.

Installation: This system needs to be aligned precisely to ensure the crane runs smoothly without misalignment or friction issues.

 

8. Hook or Grab (Lifting Attachment)

Function: The hook or grab is the part of the hoist that directly connects to the load being lifted. It can be a simple hook or a more complex grab for lifting materials that need to be handled in bulk, like scrap or bulk materials.

Structure: The hook is usually made of high-strength steel, designed to handle heavy loads safely.

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9. Brakes and Clutches

Function: Brakes are used to control the movement of the crane and ensure that it stops and holds the load safely when needed. Clutches are used to engage or disengage different parts of the crane's system, like the hoist motor or trolley motor.

Location: These are typically found on the trolley or hoist, as well as on the main bridge or end carriage, depending on the design of the crane.

10. Safety Devices

Overload Protection: This device prevents the crane from lifting loads that exceed its rated capacity, protecting both the crane and the operator.

Limit Switches: These switches are placed at the extremes of the crane's travel to prevent it from over-running its designated range.

Emergency Stop: An emergency stop button is essential for quickly halting the crane's movement in case of an emergency.

11. Electrical System

Function: The electrical system provides power to the crane's motors, control systems, and other electrical components.

Components: It includes wires, connectors, transformers, and power supply units, all designed to ensure stable power to the crane's operation.

12. Structural Components

Function: This includes the frame, support beams, and braces that help give the crane its structural integrity and support its heavy lifting capacities.

Materials: These are usually made of high-strength steel to support the weight of the crane and the materials being moved.

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Main technical

 

Advantages of LDA Type Electric Overhead Crane

An LDA Type Electric Overhead Crane is a popular choice in various industries due to its numerous benefits. Here are some of the main advantages:

1. Energy Efficiency

Electric Power: Since the LDA crane is electric-powered, it is more energy-efficient compared to older cranes that might rely on hydraulic or pneumatic systems. Electric motors provide smooth, controlled, and cost-effective operations.

Less Maintenance: Electric motors generally require less maintenance than other types of motors (like diesel or hydraulic), reducing overall operating costs.

2. Cost-Effective

Lower Initial Cost: LDA cranes, being single girder systems, are typically less expensive than double-girder cranes. This makes them ideal for businesses that need efficient lifting solutions but are working within budget constraints.

Reduced Operating Costs: With minimal moving parts and electric motors that don't require extensive servicing, LDA cranes tend to have lower long-term operational costs.

3. Compact Design

Space-Saving: The LDA crane's single girder design allows it to operate with a compact layout. It requires less headroom compared to double-girder cranes, making it suitable for facilities with limited vertical space.

Less Infrastructure: Because the crane requires only a single beam, it can be installed in smaller or existing spaces without needing significant structural changes to the building.

4. Precise Control and High Efficiency

Smooth Operation: Electric cranes offer precise control of speed and load movement, which is critical in sensitive environments. The ability to make fine adjustments ensures that items are lifted and placed exactly where they are needed.

Quick and Efficient Lifting: The electric hoist and motorized movements make the LDA crane an excellent solution for fast-paced environments where time efficiency is critical.

5. Safety Features

Overload Protection: Many LDA cranes are equipped with overload limiters to ensure that the crane does not lift more weight than it is designed for, preventing damage and accidents.

Advanced Control Systems: LDA cranes have modern control systems that include emergency stop features, limit switches, and anti-collision devices, ensuring safe operation for workers and the crane itself.

Smooth Start/Stop: The electric system offers smooth start and stop motion, reducing the risk of sudden jerks or accidents.

6. Low Noise and Vibration

Quieter Operation: Electric cranes produce less noise compared to older mechanical or hydraulic cranes, which can help reduce noise pollution in work environments.

Reduced Vibration: Electric motors tend to generate less vibration, improving comfort and safety for workers, and protecting sensitive equipment or materials from damage.

7. Durability and Longevity

Strong Structure: LDA cranes are built to last. The materials used in the construction (typically high-strength steel) ensure that the crane can endure heavy lifting over a long period of time.

Low Wear and Tear: With fewer moving parts compared to other crane systems, LDA cranes experience less wear and tear, which translates to a longer service life.

8. Easy to Operate

Operator-Friendly: The crane can be operated with a simple control pendant or a wireless remote, which makes it easy for workers to manage lifting and positioning tasks.

Training: The ease of operation means that training time for operators is typically shorter compared to more complex systems.

 

Applications of LDA Type Electric Overhead Crane

LDA Type Electric Overhead Cranes are designed for light to medium-duty applications. Their combination of efficiency, cost-effectiveness, and versatility makes them ideal for a wide range of industries and tasks. Here are some of the most common applications:

1. Manufacturing and Production Lines

Material Handling: In factories and assembly plants, LDA cranes are often used to move raw materials, parts, or semi-finished products between workstations on the production line.

Assembly Assistance: These cranes can be used to lift components and position them precisely on assembly lines, improving production speed and reducing manual labor.

Machine Loading: The crane can be used to lift heavy equipment and place it onto machinery or workstations.

2. Warehouses and Distribution Centers

Storage and Retrieval: LDA cranes are commonly used in warehouses to lift and move goods from one place to another. They can pick up items from high shelves or load them onto trucks, improving storage capacity and warehouse organization.

Inventory Handling: Cranes are used to organize bulk inventory, stack heavy items, or transport goods across the warehouse floor.

3. Construction Sites

Material Handling: On construction sites, LDA cranes can be used for moving construction materials like beams, bricks, pipes, and other heavy materials. They help transport items from storage to the work area, improving efficiency and reducing manual labor.

Lifting Heavy Tools and Equipment: In addition to raw materials, the crane can lift heavy tools, generators, or other construction equipment.

4. Shipyards and Ports

Loading and Unloading Cargo: LDA cranes are used in ports to lift shipping containers, move cargo between ships and trucks, or load/unload materials like coal or iron ore.

Heavy Machinery Handling: These cranes are also used to handle heavy machinery or other large equipment in industrial yards or shipyards.

5. Steel Mills and Foundries

Material Handling: In steel mills, LDA cranes can move heavy steel plates, beams, and coils from the production line to storage areas or between different processes.

Transporting Molten Metal: Although typically more heavy-duty cranes are used, lighter versions can also assist in transporting materials between high-temperature areas.

6. Automotive and Engineering Industries

Part Movement: LDA cranes are often used in automotive plants to move vehicle components, such as engines, transmissions, or heavy vehicle bodies along the production line.

Assembly Support: Cranes support the assembly of large components, like chassis, body panels, or engine blocks.

7. Power Plants and Energy Facilities

Equipment Handling: Power plants use LDA cranes to handle turbine components, heavy pipes, or fuel materials, making these cranes essential for plant operations and maintenance.

Routine Maintenance: These cranes can also be used during scheduled maintenance to move heavy parts or machinery for repairs.

8. Aerospace Industry

Handling Aircraft Components: LDA cranes are used in aerospace manufacturing and assembly to lift and move aircraft components, such as engines or wing sections, in assembly plants.

Precision Handling: Their precise control makes them ideal for handling delicate parts that require careful placement.

 

The production process of an LDA Type Electric Overhead Crane involves several critical stages, from initial design and material procurement to assembly and quality control. This process ensures the crane is safe, efficient, and capable of performing as expected in industrial environments. Below is a detailed breakdown of the typical production process for LDA Type Electric Overhead Cranes:

1. Design and Engineering

Concept Design: The production process begins with designing the LDA crane. Engineers and designers create detailed drawings and blueprints, considering load capacity, span, height, environment, and safety standards. The crane design is optimized for efficiency and cost-effectiveness.

Structural Calculations: Detailed calculations are performed to ensure that the crane structure can support the desired loads. This includes calculations for the bridge, hoist, trolley, and end carriage. Stress tests, wind load considerations, and safety factors are taken into account.

3D Modeling: Engineers create 3D models using CAD (Computer-Aided Design) software to visualize the crane's components and assembly. This allows for adjustments before any physical production begins.

Material Selection: Materials are selected based on the crane's requirements. Steel with high tensile strength is typically chosen for the bridge, hoist, and trolley. The control system components, such as motors and switches, are specified according to the operational needs.

2. Procurement of Materials

Raw Materials: The major materials used in the construction of an LDA crane include:

Steel Plates & Beams: Used for the bridge girder and structural framework.

Steel Wire Rope or Chains: For the hoist mechanism to lift loads.

Motors and Electrical Components: For the trolley, hoist, and control system.

Control Panels: For operating the crane, including limit switches, emergency stops, and other safety devices.

Other Components: Such as wheels for the end carriages, hook, electrical cables, and rail tracks for movement.

Quality Control: Materials undergo rigorous quality checks to ensure they meet the required specifications. Steel plates, beams, and other structural components are tested for strength and durability, while electrical parts are checked for compatibility and performance.

3. Fabrication of Crane Components

Bridge Construction:

Cutting and Shaping Steel: The steel beams are cut into specified lengths and shaped using specialized equipment like plasma cutters and bending machines.

Welding: The beams and frames are welded together to form the main bridge structure. Welds are carefully inspected to ensure strength and integrity.

Surface Treatment: After welding, the steel components are often treated with anti-corrosion coatings, such as powder coating or galvanizing, to protect the crane from environmental factors like rust.

Hoist and Trolley Assembly:

Hoist Construction: The hoist mechanism is built, consisting of a drum, rope or chain, electric motor, and hook. The rope or chain is wound around the drum, and the hoist's motor is mounted.

Trolley Construction: The trolley is assembled, which includes the motorized wheels, frame, and a connecting mechanism to move the hoist along the bridge. The trolley is designed to travel smoothly along the rails of the crane bridge.

End Carriage Fabrication: The end carriages (or end beams) are produced, where wheels and axles are mounted to enable movement along the track. These components are welded together and aligned for precision.

Electric Motor Installation:

Motor Mounting: Motors for the hoist, trolley, and bridge are installed on their respective frames. These motors are linked to the gear systems that provide the necessary power for movement.

Wiring: Electrical wiring for all motors, switches, and control systems is installed. This includes power cables for the crane's movement, as well as safety control wiring.

4. Assembly and Integration

Bridge and End Carriage Assembly: The bridge and end carriages are joined together. The assembly team carefully aligns the components to ensure smooth movement along the rails. Once aligned, they are bolted or welded into position.

Hoist and Trolley Installation: The hoist is attached to the trolley, which is then mounted on the crane bridge. The trolley must be positioned correctly so that it can travel along the full length of the bridge while lifting and lowering loads.

Track and Rail Setup: The crane is mounted on rails or a track system, allowing the end carriages to move. These rails must be level and precisely installed for smooth operation.

5. Control System Installation

Electrical System Setup: The control system is installed, which includes the control panel, switches, motor controllers, and emergency stop systems. These components allow the operator to control the crane's movements, such as lifting, lowering, and moving horizontally.

Wiring and Testing: The crane's wiring is connected to power sources, motors, and safety systems. Electrical tests are carried out to ensure that the control system functions correctly, including testing the emergency stops, limit switches, and overload protection.

Remote Control System (Optional): For cranes that use wireless or pendant controls, the system is installed and tested. This may include connection to a transmitter/receiver system for wireless operation.

6. Testing and Quality Assurance

Load Testing: A critical step in the production process. The crane is subjected to a load test where it is loaded to its rated capacity and tested for performance. This ensures the crane can safely lift and carry its maximum load without structural failure.

Functional Testing: The crane's movement along the rails, hoisting mechanism, motor performance, and control system are all tested thoroughly. The crane is moved through all directions-up, down, left, right-to verify that all functions work smoothly and safely.

Safety Features Testing: All safety systems, including overload limiters, emergency stop buttons, and anti-collision devices, are tested to ensure they respond correctly in case of malfunction.

Inspection and Certification: The crane is inspected for compliance with international and local safety standards (such as ISO or ASME standards). Once passed, the crane is certified for use.

7. Packaging and Shipping

Disassembly for Shipping: For transport, the crane may be disassembled into its major components (bridge, trolley, hoist, control systems, etc.). This makes it easier and safer to ship.

Packaging: Components are carefully packed and protected for shipping. Special care is taken to avoid damage to sensitive electrical or mechanical parts during transit.

Shipping: The crane is shipped to the customer or construction site where it will be reassembled and installed.

8. Installation and Final Inspection

Site Preparation: The installation site is prepared, including the installation of rail systems or other structural requirements. If the crane is part of a new building, installation occurs once the structure is ready.

Reassembly: The crane is reassembled at the site, with final checks and adjustments made to ensure all components are aligned and functional.

Final Testing: A final round of functional and load tests is performed after installation to ensure that the crane operates properly in its intended environment.

9. Operator Training and Handover

Operator Training: The crane's operator(s) receive training on how to use the controls, perform safety checks, and operate the crane effectively.

Documentation: Manuals and documentation outlining the crane's operation, maintenance schedule, and safety guidelines are provided to the customer.

Handover: Once the crane is fully tested and operational, it is officially handed over to the customer for use.

Workshop view:

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.