Why cranes choose copper bushings made of copper?

The main reasons for cranes to choose copper bushings made of copper are as follows:

First, good wear resistance

Copper bushing moderate hardness: the hardness of copper is relatively moderate, neither like some soft metals that are easy to wear, nor like high hardness metal that in the friction process on the matching parts cause excessive wear. In the various moving parts of the crane, copper bushing and shaft or other parts of the mutual friction, can maintain good stability and wear resistance, to extend the service life of the equipment.

Self-lubricating properties: copper itself has certain self-lubricating properties. In the process of operation, the surface of the copper bushing will form a thin lubrication film, reducing the coefficient of friction and reducing wear. This is particularly important for cranes that require frequent starting, stopping and heavy load equipment.

Second, good thermal conductivity

Good heat dissipation: when the crane is working, the moving parts will produce a lot of frictional heat. If the heat can not be emitted in a timely manner, it will lead to an increase in the temperature of the components, affecting the performance and life of the equipment. Copper has good thermal conductivity, can quickly transfer the heat generated by friction, to keep the temperature of the components within a reasonable range. For example, in the hoisting mechanism of the crane, the friction between the wire rope and the pulley will generate heat, and installed in the pulley shaft of the copper bushings can effectively conduct the heat out to prevent overheating damage to the pulley.

Prevent local overheating: good thermal conductivity can also avoid the occurrence of local overheating phenomenon. In some key parts of the crane, such as slewing bearing, traveling mechanism, etc., if local overheating occurs, it may lead to deformation of parts, jamming and other failures. The thermal conductivity of the copper sleeve can make the heat evenly distributed, reducing the risk of localized overheating.

Third, corrosion resistance

Adapt to a variety of working environments: cranes usually work outdoors and face a variety of harsh environmental conditions, such as humidity, corrosive gases, chemicals and so on. Copper has good corrosion resistance, can resist the erosion of these environmental factors, to ensure that the copper sleeve will not be damaged by corrosion in the long-term use process. For example, in ports, chemical enterprises and other highly corrosive places, cranes can improve the reliability and durability of the equipment by choosing copper copper bushings.

Reduce maintenance costs: Because copper bushings have better corrosion resistance, they do not require frequent anti-corrosion treatment, which reduces maintenance costs. At the same time, it also reduces the equipment failure and downtime caused by corrosion, and improves the efficiency of the crane.

Four, good workability

Easy to manufacture and install: copper is relatively soft, easy to process into various shapes and sizes of copper bushings. In the manufacturing process, casting, forging, machining and other methods can be used to meet the design requirements of different cranes. At the same time, the installation of copper bushings is also relatively convenient, can be installed on the shaft or other components through the interference fit, press-in and other ways to ensure that the installation is firm and reliable.

Repairability: If the copper bushing is worn or damaged in the process of use, it can be repaired by re-processing, patch welding and other methods to extend the service life of the copper bushing. Compared with some other materials, copper bushing, copper is more repairable, reducing the replacement cost of equipment.

Fifth, good load-bearing capacity

Withstand heavy loads: cranes need to withstand large loads when working, including lifting capacity, impact loads and so on. Copper bushing has a good bearing capacity, can withstand these loads without deformation or damage. For example, in the crane's large slewing bearing, copper bushing as an important bearing parts, need to withstand huge axial and radial loads, copper bushing can meet the requirements of this high-intensity use.

Good stability: the bearing capacity of copper bushings is also reflected in its stability. When subjected to heavy loads, copper bushings can maintain good shape and dimensional stability, will not be significantly deformed due to changes in load, to ensure that the moving parts of the crane can operate normally.