Detailed description of technical parameters of QD electric double-girder bridge crane

I. Core Parameters

Lifting Capacity

• Common main hook and auxiliary hook combinations include 32/10t (main hook 32 tons, auxiliary hook 10 tons) and 50/10t. Specifications range from 5 tons to several hundred tons, allowing users to choose according to their needs.
• In fractional notation, the numerator is the main hook lifting capacity, and the denominator is the auxiliary hook lifting capacity (for example, 20t/5t).

Span and Track Height

• Span (distance between wheel centers): The standard range is 10.5 meters to 31.5 meters, with customization available for specific needs.
• Track Height: Typically 9 meters (indoors). Outdoor use requires additional rain protection, increasing the total weight and wheel load by approximately 5%.

Lifting Height

• The standard configuration is 12 meters, which can be expanded to 14 meters, 16 meters, or higher.

Working Class

• Categories include intermediate (A5) and heavy (A6). A5 is suitable for general workshops such as machining, while A6 is suitable for high-volume operations such as metallurgy and casting.

II. Operating Speed

Item	Typical Value (Range)	Remarks
Main Hoisting	6.2 ~ 10.1 m/min	Low-speed type is 6.2 m/min, high-speed type can reach 12 m/min.
Aux. Hoisting	7.6 ~ 12.6 m/min	Auxiliary hook speed is usually higher than the main hook.
Long Travel	30 ~ 76.7 m/min (Multi-speed)	Three-speed control is common, adapting to different working conditions.
Cross Travel	20 ~ 43.8 m/min	Some models use a double-extending shaft motor design.

III. Motor and Drive Configuration

• Main hook motor: YZR280S-10 (42 kW) or similar model, power increases with lift capacity.
• Auxiliary hook motor: YZR180L-8 (13 kW).
• Trolley Travel motor: Two YZR160M1-6 (6.3 kW), dual-motor drive.
• Trolley motor: YZR160M1-6 (6.3 kW, dual-shaft).
• Reducer: Used with the corresponding motors; the specific model should be matched according to load and speed.

IV. Environmental Adaptability

• Temperature range: -20°C to +40°C; rain protection devices are required for outdoor operation.
• Power supply: Slide rail power supply or cable reel; slide rails are often used indoors.
• Operation: Remote control and operator control in the cab; some models support ground-based operation.

V. Structural Features

• Main beam design: Box-shaped structure with internal reinforcement plates to enhance torsional resistance and stability, suitable for lifting long and heavy objects. Electrical System: Variable frequency speed regulation technology ensures smooth starting and stopping, and precise positioning.
• Customization Options: Adjustable span, lifting height, and cab type (open/closed/insulated with air conditioning).

VI. Selection Considerations

• The contract must clearly specify: lifting capacity, span, lifting height, operating class, track type, and ambient temperature.
• Special requirements: Outdoor use, frequent operations (A6 class), and extra-high spans must be specified in advance.