The truck-mounted crane is a practical working machine for us when moving heavy objects. It has a good lifting effect, is widely used and convenient to use, which can help us save a lot of time and energy. However, if we operate in some incorrect ways, it is possible that the opposite effect will occur. What specific incorrect operation methods should be noted?
The truck-mounted crane is a practical working machine for us when moving heavy objects. It has a good lifting effect, is widely used and convenient to use, which can help us save a lot of time and energy. However, if we operate in some incorrect ways, it is possible that the opposite effect will occur. What specific incorrect operation methods should be noted?
Before carrying out the operation, we need to have a thorough understanding of the actual situation at the operation site and the specific specifications of the lifted heavy objects. Otherwise, some uncontrollable situations may arise due to deviations from the actual operation requirements. During operation, incorrect operation methods such as overloading and unstable circuit connection can cause damage to the crane and also pose corresponding stability risks. When operating, if the crane is used directly without adding counterweights, this approach will cause the crane to lose balance during lifting and tip over. If the boom is not retrieved in time after use, it will have a negative impact on the service life of the boom.
When using truck-mounted cranes, we should avoid the above-mentioned incorrect usage methods. Otherwise, not only will the operation efficiency not be reduced, but also damage will be caused to the crane and the operation site.
To ensure that the truck-mounted crane achieves good balance and stability during operation, we usually add counterweights to the truck-mounted crane for lifting operations. However, there is also an upper limit to the amount of additional counterweight. It is not the case that the more additional counterweight, the better.
For truck-mounted cranes, each machine has a rated load capacity. If this load capacity is exceeded, the truck-mounted crane will be overloaded. The additional counterweight added behind the truck-mounted crane needs to be one to two times the weight of the lifted object. Therefore, it should reach twice the maximum load capacity of the truck-mounted crane. Increasing the counterweight further has no arbitrary significance. Not only that, the load-bearing capacity of the frame of a truck-mounted crane is also limited. If the weight of our counterweight is too large and exceeds the load-bearing capacity of the frame, the frame may deform or even be damaged.
Although increasing the weight of the counterweight can make the operation of the truck-mounted crane more stable, the weight of the counterweight we add should also be appropriate. It is necessary to ensure that it is added within the range that does not damage the truck-mounted crane and can stably bear the load.
What are the reasons for the overheating of the hydraulic transmission system of a small crane?
[1] The oil tank of the small crane is very small in volume, with insufficient total heat dissipation area. No oil refrigeration equipment is installed, or although there is refrigeration equipment, its volume is too small.
[2] The variable pump provided by the small crane, which selects the volume of the gasoline pump at a non-slow release rate, generates a large amount of unwanted flow that overflows from the speed control valve under high pressure during operation, causing overheating.
[3] The clearance between the mating parts of the small crane is very small, or after application damage, the clearance becomes too large, resulting in large internal and external leakage, which leads to significant capacity loss, such as a decrease in the capacity rate of the pump and slow heating.
[4] The pressure regulation of the hydraulic transmission system of the small crane is higher than the specific requirements. Sometimes, it is due to overly tight sealing, or the damage of hydraulic seals and the expansion of leakage that the working pressure has to be increased in order to operate.
[5] The high climate and working temperature of the small crane lead to a high oil temperature.
[6] Selecting the viscosity of the hydraulic oil for the small crane is not appropriate. If the viscosity is too high, the frictional resistance will be large; if it is too low, the leakage will expand. Both situations can cause the hydraulic oil to become hot.
