With the continuous development of technology, cranes are constantly developing and progressing. Today we will talk about the new and practical development trend of cranes.
The crane adopts thin-walled profiles and profiled steels in the structure, and reduces the structural joint welds to improve the fatigue resistance. The use of a variety of high-strength low-alloy steel new materials, improve the load-bearing capacity, improve the stress conditions, reduce the weight and increase the appearance. Most of the bridge crane's bridge structure adopts box-shaped four-beam structure. The main beam and the end beam are connected by high-strength bolts, which is convenient for transportation and installation.
The crane further develops new transmission components and simplifies the mechanism. The "three-in-one" operating mechanism combines the motor, reducer and brake into one, which has the advantages of compact structure, light and beautiful appearance, convenient assembly and disassembly, simple adjustment, stable operation and large matching range. It has been widely used in various cranes abroad. On the operating agency. In order to simplify the structure of the small and medium-sized lifting trolleys, reduce the size of the crane and reduce the wheel pressure, the electric hoist has been widely used as a lifting mechanism in foreign countries. In order to reduce the self-weight, improve the carrying capacity, improve the processing and manufacturing conditions, and increase the product yield, the parts should be welded by casting, such as the reducer housing, the winding, the pulley, etc. The reducer gears are hardened to reduce their own weight, reduce the volume, increase the load carrying capacity and increase the service life. The range of applications for hydraulic pusher disc brakes is also growing. In addition, the motors used in each mechanism are developed to a high rotational speed, thereby reducing the number of the motor base, reducing the weight and reducing the size, and providing a brake with a small braking torque.
The crane develops a speed control system and an electronic control system with good performance, low cost and high reliability in the electronic control, and develops semi-automatic and fully automatic operation. The use of electromechanical instrument integration technology to improve the performance and reliability of the crane and increase the function of the crane. The control technology of fuzzy logic circuit is developed. The neural information and fuzzy technology are used to find the best time to start the acceleration, and the data input system of the experienced driver can prevent the actual operation from being realized. The fuzzy control method can determine the control instructions for implementing the automatic work, and digitally quantify the subjective fuzzy quantity through the fuzzy set.
