English Views: 367 Author: Site Editor Publish Time: 2021-07-12 Origin: Site
It has been more than 130 years since the first manual excavator came out. During this period, it has experienced a gradual development from steam-driven semi-rotary excavators to electric and internal combustion engine-driven full-rotation excavators, and fully automatic
hydraulic tilt bucket excavators using mechatronics technology development process. Bucket shovel excavators in industrially developed countries were produced earlier. France, Germany, the United States, Russia, Japan, etc. are the main producers of single-bucket hydraulic excavators with a bucket capacity of 3.5-40m³. Super-large excavators have been produced since the 1980s. Since the late 20th century, the production of mud bucket excavators in the world has developed in the direction of large-scale, miniaturized, multi-functional, specialized and automated.
In order to meet the needs of municipal construction and farmland construction, foreign countries have developed mini bucket bushing excavators with bucket capacity below 0.25m³, and the smallest bucket capacity is only 0.01m³. In addition, the largest number of medium and small excavators tend to have multiple functions and are equipped with a variety of working devices-in addition to front shovel and backhoe, they are also equipped with lifting, excavator grapple buckets, leveling buckets, loading buckets, and harrows, teeth, broken cones, twist drills, electromagnetic chucks, vibrators, bulldozers, impact shovel, container forks, aerial work frames, reamers and draglines, etc., to meet various construction needs. The rapid development of full hydraulic tilt ditching bucket excavators, continuous improvement and innovation of control methods, so that the excavator developed from simple lever control to hydraulic control, pneumatic control, hydraulic servo control and electrical control, radio remote control, electronic computer integrated program control and can be used under noise in hazardous areas or underwater operations, underwater special and amphibious excavators, etc.
The use of radio control, the use of an electronic computer to control the receiver and laser guidance combined to achieve complete automation of bucket digger operation. All of this, the full hydraulic excavator has laid the foundation and created a good premise for it.
Attach importance to the adoption of new technologies, new processes, and new structures, and accelerate the development of standardization, serialization, and generalization. For example, the swivel bucket excavator produced by Atlas Company of Germany is equipped with a new type of engine speed adjustment device, so that the excavator can work at the speed most suitable for its operation requirements. The new C series LS-5800 hydraulic excavator of Lincoln-Bert Company of the United States is equipped with a fully automatic control hydraulic system, which can automatically adjust the flow rate and avoid the waste of driving power. CAPS (Computer Aided Power System) has also been installed to improve the working power of the shaker bucket excavator and better play the function of the hydraulic system.
Update design theory, improve reliability and extend service life. The United States, Britain, Japan and other countries promote the use of limited life design theory to replace traditional infinite life design theories and methods, and integrate fatigue damage accumulation theory, fracture mechanics, finite element method, optimization design. Advanced technologies such as electronic computer-controlled electro-hydraulic servo fatigue test technology and fatigue strength analysis methods are applied to the strength research of hydraulic excavator scoop buckets, which promotes the high quality, high efficiency and competitiveness of the products.
