Excavator (heavy construction machinery)
Excavator, also known as excavating machinery, also known as excavator, is a kind of earth moving machinery that excavates materials higher or lower than the bearing surface with a bucket, and loads them into transport vehicles or unloads them to the stockyard.
The materials excavated by the excavator are mainly soil, coal, sand and soil and rock after pre loosening. From the development of construction machinery in recent years, the development of excavator is relatively fast, excavator has become one of the most important construction machinery in engineering construction. The most important three parameters of excavator: operating weight (mass), engine power and bucket capacity.
History of development
At first, the excavator was manual. It has been more than 130 years since the invention to 2013. During this period, it has experienced the gradual development process from steam driven bucket rotary excavator to electric drive and internal combustion engine driven rotary excavator, and fully automatic hydraulic excavator applying electromechanical hydraulic integration technology. The first hydraulic excavator was successfully invented by the bockland factory in France. Due to the application of hydraulic technology, tractors were equipped with hydraulic backhoe ground mounted excavators in 1940s. In 1951, the first full hydraulic backhoe excavator was launched by POCLAIN factory in France, which created a new space in the technical development field of excavators. In the early and mid-1950s, towed full rotary hydraulic excavator and crawler full hydraulic excavator were developed successively. The initial trial production of hydraulic excavators is based on the hydraulic technology of aircraft and machine tools. The lack of hydraulic components suitable for various working conditions of excavators leads to unstable manufacturing quality and incomplete supporting parts. Since the 1960s, the hydraulic excavator has entered the stage of popularization and vigorous development. The manufacturers and varieties of excavators in various countries have increased rapidly, and the output has increased sharply. From 1968 to 1970, the output of hydraulic excavators accounted for 83% of the total output of excavators, which was close to 100%.
The first generation of excavators: the emergence of electric motors and internal combustion engines made excavators have advanced and appropriate electric devices, so all kinds of excavator products were born one after another. In 1899, the first electric excavator appeared. After the first World War, diesel engines were also used in excavators. The mechanical excavators driven by diesel engines (or motors) were the first generation excavators.
The second generation excavator: with the wide use of hydraulic technology, the excavator has a more scientific and applicable transmission device, hydraulic transmission instead of mechanical transmission is a great leap in excavator technology. In 1950, Germany's first hydraulic excavator was born. Hydraulic mechanical transmission is the second generation excavator.
The third generation excavator: the wide application of electronic technology, especially computer technology, makes the excavator have automatic control system, and also makes the excavator develop towards high performance, automation and intelligence. The germination of Mechatronics took place around 1965, while the application of mechatronics technology in mass-produced hydraulic excavators was around 1985. At that time, the main purpose was to save energy. Electronic excavator is the symbol of the third generation excavator.
Excavator industry manufacturers can be roughly divided into four categories. More than 70% of domestic excavators are occupied by foreign brands. Domestic brands are mainly small digging and medium digging. However, the share of domestic excavators is gradually increasing, with a year-on-year increase of 3.6% in 2012.
Luzhou Libang Metal Structure Co., Ltd. is specialized in the production and processing of excavators' positive dippers Backhoe of excavator 、 Plum blossom grab of steel grabbing machine And various metal structure products processing.
Luzhou Libang Metal Structure Co., Ltd
Mobile phone: 13550890427 Manager
Address: Section 2, Xinyang Road, high tech Zone, Luzhou City, Sichuan Province