Knowledge of the hottest mining machinery

2022-08-24
  • Detail

Relevant knowledge of mining machinery

Introduction to mining machinery mining machinery is an earth moving machinery that uses a bucket to excavate materials higher or lower than the bearing surface, and loads them into transport vehicles or discharges them to the stockyard. The excavated materials are mainly soil, coal, sediment and pre loosened rocks and ores. Excavation machinery is divided into single bucket excavator and multi bucket excavator

classification of excavation machinery English: excavation machinery

in general engineering, about 60% of the earth volume and 80% of the stripping volume and excavation volume of open-pit mines are completed by excavation machinery. Excavation machinery is divided into single bucket excavator and multi bucket excavator, which is what we usually call the long-term use temperature of plastic. The operation of single bucket excavator is periodic, and the operation of multi bucket excavator is continuous

the excavator with the earliest development of excavation machinery is a dredger powered by human or animal power, which is used to dig deep river bottom. The bucket capacity is generally not more than 0.2 ~ 0.3 meters ³; From 1833 to 1836, Otis, an American, designed and manufactured the first single bucket excavator with steam engine drive, iron wood mixed structure, semi rotary and rail type. The productivity was 35 meters, but it was not applied due to poor economy. In the 1970s, the improved steam shovel was officially produced and applied to stripping in open-pit mines. In 1880, the first batch of semi rotary steam shovels with tractors as chassis appeared

from the beginning of the 20th century to the end of the 1940s, excavators entered the stage of diversification of power and walking devices. In 1910, the first single bucket excavator driven by motor appeared; In 1912, the full rotary single bucket excavator driven by gasoline engine and kerosene engine appeared; In 1916, a single bucket excavator driven by a diesel generator was produced; In 1924, the direct drive of diesel engine began to be used on single bucket excavators; The crawler type walking device was adopted in 1910. With the development of automobile industry, the tire type walking device is widely used in small excavators. In the 1930s, walking devices appeared; In the mid-1950s, Germany and France successively developed full rotary hydraulic excavators. Since then, the development of excavators has entered a new stage

multi bucket excavator also has a history of more than 100 years. France produced the world's first multi bucket excavator with relatively mature structure in 1860 for the Suez Canal excavation project. In 1889, I seem to have found a way. In, the multi bucket trencher produced in the United States can dig ditches with a width of 0.29 meters. 8: electrical control system: the main electrical components are ditches with a depth of 1.4 meters produced by foreign or Sino foreign joint ventures. At the end of the 19th century, bucket wheel excavators were widely used in lignite mining in Germany. By 1958, the capacity of each bucket had reached 3600 liters. In 1977, the Federal Republic of Germany manufactured the world's largest bucket wheel excavator with a productivity of 240000 meters. In general, about 60% of the earthwork and 80% of the stripping and excavation of open-pit mines are completed by excavation machinery. Excavation machinery is divided into single bucket excavator and multi bucket excavator. The operation of single bucket excavator is periodic, and the operation of multi bucket excavator is continuous

composition of mining machinery mining machinery is generally composed of power device, transmission device, walking device and working device. Single bucket excavators and bucket wheel excavators also have turntables, and multi bucket excavators also have material conveying devices

the power unit includes diesel engine, motor, diesel generator set or external power converter set. Diesel engines and motors are mostly used in small and medium-sized mining machinery. They are driven centrally by a prime mover, and the two are interchangeable. Diesel generator sets and external power converter sets are used for large and medium-sized mining machinery, which are driven by multiple motors

the traveling device mainly uses 2 The accuracy of the testing machine should be ± 1% to support the machine, change the working position of the machine and transfer the working site; In addition, the buckets of chain bucket excavators and ring wheel excavators cut the soil with the continuous walking of the walking device. Walking devices include crawler type, tire type, walking type, rail type, floating type and trailer type

crawler type shall be used when the operation site is fixed and the grounding specific pressure is required to be low; When the operation site is changeable, use tire type; When special tracks must be erected due to special construction conditions, track type shall be used; Floating type is used to excavate underwater soil; When the walking device of the small single bucket excavator has no power source, the trailer type is used; When the operation site is fixed and the machine weight is large, the walking type is used. Walking devices are mostly used in large and medium-sized dragline excavators and bucket wheel excavators in single bucket excavators

Copyright © 2011 JIN SHI