Add:NO.2588 Longwu Road,
Xuhui District, Shanghai
Excavators are divided into two categories, single bucket excavators and bucket excavators. The operation of the single bucket excavator is cyclical, and bucket excavator's operation is continuous. The used excavators have a long history. The development of excavators can date back to ancient times. The earliest used excavator is based on human or animal power, which is used to dig deep deepened mud boat in the river. The capacity of the bucket is generally less than 0.2~0.3meters & sup3. From 1833 to 1836, the American Otis designed and manufactured the first steam engine drive, iron wood composite structures, semi-rotary, rail line of single bucket excavator, the production rate is 35m/h, but because of the poor economy stops its application. In the 70s, the modified steam shovel was applied in pit mine stripping formally. In 1880, a rotary steam shovel which was based on the chassis of the tractor appeared again.
To the 40s from the early 20th century, the history of used excavator has entered into the step between the diversification of power and walking device. In 1910, the first electric motor driven single bucket excavator was born. In 1912, all rotary single bucket excavator with the driven of gasoline engine and kerosene machine appeared. In 1916, the single bucket excavator and used excavator were produced with diesel generator driven. The diesel generator driven was directly used on single bucket excavator in 1924; crawler walking device was used in 1910. With the development of automobile industry, the tyred walking device was widely used in small excavators and used excavators. The walking device was used in the 30s, in the middle of the 50s, a kind of full rotary hydraulic excavator was developed in Germany and France, from that time, the development of excavator has gone into a new stage.
Both excavator and used excavator have a history of more than 100 years. The earliest and more matured structure excavator was produced in 1860 in France, which was used in the Suez Canal excavation engineering. The production of excavator which was produced in 1889 in America, it can dig the ditched with 0.29 meters wide and 1.4 meters deep. In the late 19th century in Germany, the excavator is widely used in coal mining, to 1958, the capacity of each bucket has reached to 3600 liters. In 1977, the largest bucket wheel excavator was produced in Germany with a high productivity of 240000meters/day.
Used excavator usually consists of power device, transmission device, walking device, working device and so on. Single bucket excavator, bucket wheel excavator and turntable, also bucket excavator with conveying device. Power unit contains diesel engine, motor, diesel generating sets or external power converter unit and so on. Both of them are widely used in medium and small mining machinery. Diesel generator excavator and external power converter unit are used in large and medium-sized mining excavator, which scattered motor drive.
Other used excavator products, please click in:
- Related News