The electromagnetic rotating hanging beam of overhead crane is an efficient and flexible lifting equipment, widely used for lifting and transporting large-sized items such as steel plates and steel billets. This article will provide a detailed introduction to the design of the electromagnetic rotating suspension beam for bridge cranes from the aspects of structural design, working principle, and optimization measures.
Structural design
The electromagnetic rotating hanging girder of bridge crane is mainly composed of the following parts:
Main girder: The main girder is the main structure of the overhead crane, used to support and fix the electromagnetic rotating girder system. The design of the main girder needs to meet the requirements of strength and rigidity to ensure the stability and reliability of the crane in the working process.
Trolley: The trolley moves along the main girder track to realize the horizontal and vertical movement of the lifted items. The structure of the trolley includes the trolley frame, running mechanism and lifting mechanism. Among them, the carriage frame is used for installing and operating mechanism, lifting mechanism and electromagnetic rotating hanging beam.
Electromagnetic rotating girder: Electromagnetic rotating girder is the key component of crane, which is composed of electromagnet and girder. The electromagnet generates a magnetic field by energizing, and adsorbs the lifting objects; the hanging beam is used to connect the electromagnet and the hoisting mechanism, and realize the rotation of the objects at the same time.
Slewing mechanism: The slewing mechanism is used to realize the rotation of the electromagnetic rotating beam in the horizontal direction. The slewing mechanism usually consists of motor, reducer, slewing bearing, etc. The motor drives the reducer, so that the slewing bearing drives the hanging beam to rotate.
Electrical system: The electrical system includes control system and safety system. The control system is used to control the functions of the crane, such as trolley movement, lifting and rotation, etc. The safety system is used to detect the weight of the lifting objects, the state of the electromagnetic hooks and electromagnets, and issue an alarm or take measures when necessary to avoid accidents.
Working Principle
The working principle of bridge crane electromagnetic rotating hanging beam is as follows:
Electromagnetic adsorption: When the electromagnet is energized, the internal coil generates a strong magnetic field to attract the lifting articles. The adsorption and release of lifting objects can be realized by adjusting the size of current and on-off control.
Lifting and moving: The lifting mechanism lifts or lowers the electromagnetic rotating hanging beam by wire rope or chain to realize the vertical movement of the articles. The trolley moves along the main beam track to realize the horizontal movement of the articles.
Rotation: The slewing mechanism drives the reducer through the electric motor, so that the slewing bearing drives the hanging beam to rotate, realizing the rotation of the articles in the horizontal direction. The rotating speed can be adjusted according to the need to meet different operation requirements.
Optimization measures
In order to improve the working efficiency and safety of the electromagnetic rotating hanging beam of the overhead crane, the following optimization measures can be taken:
Electrical anti-swing system: The electrical anti-swing system measures the angle formed in the movement of the trolley and the hanger and controls the swing of the hanger through acceleration and deceleration. When the trolley reaches a certain speed or is stationary, the angle between the crane and the hanger is basically vertical, thus eliminating the swinging problem.
Improve the rigidity of the slewing mechanism: the rigidity of the slewing mechanism is crucial to the stability and rotational accuracy of the crane. It is possible to improve the stiffness of the carriage frame and slewing support, as well as increase the rolling body and its clearance with the inner and outer rings to reduce the rotary friction resistance moment and improve the rotary accuracy and stability.
Safety system upgrade: Upgrade the safety system, increase the weight detection and condition monitoring functions to ensure that abnormalities are detected and dealt with in a timely manner during the lifting process, so as to avoid the occurrence of safety accidents.
Maintenance: Regularly carry out maintenance on the electromagnetic rotating girder of overhead cranes, check whether the electrical system, mechanical parts and slewing mechanism work properly, and replace the parts with serious wear and tear in time to ensure the long-term stable operation of the crane.
In summary, the structural design of electromagnetic rotating girder of overhead travelling crane needs to comprehensively consider factors such as strength, rigidity, flexibility and safety. By optimizing the electrical system, improving the rigidity of the slewing mechanism and upgrading the safety system and other measures, the efficiency and safety of the crane can be further improved.
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