Analysis of Lifting Capacity and Turning Radius of lotion Crane

1、 Enhancing Capability: Breakthrough from Tonne to Extreme

Conventional tonnage range

The lifting capacity of lotion crane (taking hydraulic drive crane as an example) covers a wide range, from several tons of small and medium-sized equipment to thousands of tons of large projects. For example:

Ship hydraulic crane: The rated lifting load can reach 20KN (about 2 tons), suitable for cargo lifting in maritime operations.

Marine diesel hydraulic crane: such as the Euro 75 ton 45 meter model, with a rated lifting capacity of 75 tons and a lifting height of 45 meters, it can accurately complete high-altitude operations for heavy cargo.

Tower crane: working height of 40-60 meters, some models can reach 100-160 meters, working radius of 20-80 meters, suitable for material lifting in high-rise buildings.

Breakthrough in the limit tonnage level

The lotion compound crane with the world's largest lifting capacity has reached 6400 tons, which is jointly developed by China Chemical Erjian Group and others. This device can be divided into two 3200 ton cranes or combined into a single 6400 ton crane, with a maximum lifting height of 120 meters, equivalent to lifting the weight of 106 train carriages to high altitude. Its core technologies include:

Hydraulic synchronous control: Fully automatic synchronous control is achieved through a computer system to ensure load balancing and attitude correction.

Modular design: Adapt to different working conditions while considering flexibility and stability.

2、 Turning radius: balance between flexibility and stability

Definition and Calculation

Rotation radius refers to the functional relationship between the distance from the fulcrum center of the crane arm to the center of the rotation axis, the length of the arm, and the elevation angle. The calculation formula is:

R = S + L × cosα

(S: Distance from arm pivot point to rotation axis; L: Arm length; α: Arm elevation angle

Typical parameter range

Small equipment: such as ship hydraulic cranes, with a minimum turning radius of 0.64 meters, a maximum turning radius of 3 meters, and a turning angle of 0-180 °, suitable for narrow space operations.

Medium sized equipment: such as tower cranes with a working radius of 20-80 meters, which achieve large-scale coverage through a rotating mechanism.

Large equipment, such as a 6400 ton hydraulic compound crane, adapts to different rotation requirements through modular design to ensure the accuracy of lifting overweight objects.

influencing factors

Arm length and elevation angle: The longer the arm and the smaller the elevation angle, the larger the turning radius, but it is necessary to avoid the risk of overturning.

Stability requirement: If the turning radius is too large, it will increase the overturning moment, which needs to be balanced through methods such as counterweight and leg extension. For example, a crawler crane needs to control the maximum pressure on the soil during lifting within 4 kilograms per square centimeter.

3、 Technical core: synchronous control and structural optimization

Hydraulic synchronous control technology

Continuous synchronous lifting: By using a computer system to achieve load balancing, posture correction, operation locking, process display, and fault alarm, the safety and quality of the project are greatly improved.

Dual line design: Key protection devices (such as speed limit and deceleration functions) adopt a dual line design to ensure that the other line can still work normally when one line fails.

Structural optimization technology

Rigid leg segmented lifting: Combined with slip rotation installation technology, it reduces the cost of measures and shortens the installation cycle.

Flexible legs follow the main beam for lifting: ensuring the stability of installation of overweight, ultra-high, and large-span components.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment