The common major accidents in running cranes are "overturning", "falling arm" and "folding arm".To avoid “overturning” accidents, the running crane is strictly prohibited from overloading and lifting. If the weight is unclear, can lift the weight slightly off the ground first, and then kick the heavy arm reverse support (outrigger) with your feet, if the arm moves, must not lift the objects. During lifting operation, it is strictly forbidden to extend the boom after lifting to prevent the over-torque from losing stability; in addition, oblique lifting should be av ...
In order to obtain ultra-fine-grained steel, a variety of process methods have been developed: repeat heat treatment under the same rapid heating condition, mechanical grinding of metal powder, controlled rolling, controlled cooling, TMCP, composite TMCP method, etc. The ultrafine grains is the determinant of the excellent strength and toughness of ultrafine grain steels. Therefore, the difference between ultrafine grain steels and traditional steels is that their chemical composition cannot be used to predict strength of steel.Compared with traditional steels of the same strength, the main fe ...
When the crane machine is in use, the moving parts will be worn, the connecting parts are loose, the oil is transformed, the metal structure is corroded, and then the performance and safety of the crane machine are reduced. To prevent and eliminate hidden dangers, ensure that the crane machine is in a good condition. Good maintenance can play the following roles:1. Ensure that the crane machines are normal and reliable, improve their utilization rate;2. Strengthen the connection of the structural parts of the crane machine to ensure that the operation and function of the electrical components ...
With the continuous development of technology, crane machines are constantly developing and progressing. The crane machine adopts thin-walled profiles steels, reduces the structure of the joint welds, and improves the fatigue resistance. It adopts various high-strength and low-alloy steel materials to improve the load-carrying capacity, improve the stress conditions, reduce the self-weight and increase the appearance.The crane machine technology develops new transmission components and simplifies the mechanism. The "three-in-one" running mechanism combines the motor, reducer and brak ...
Lubrication is one of the important measures to ensure the normal operation of the crane machine, extend the life of the equipment, improve efficiency and safe production. Maintenance personnel should fully understand the importance of equipment lubrication, frequently check the lubrication of each moving parts, and regularly add to each lubrication point.Lubrication notes:1. Keep the crane machine lubricating oil clean;2. Different grades of lubricating oil should not be mixed;3. Select the appropriate lubricating oil for lubrication according to the specified time;4. Use the pressure grease ...
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