In January 1996, Komatsu established Demag Komatsu company in Germany, and later renamed Komatsu mining Germany. In 1999, Komatsu launched PC8000 hydraulic excavator whose predecessor was Demag H655. It is the largest hydraulic excavator in Komatsu, which has two forms: diesel engine drive and electric drive. The working weight is 714 tons, the diesel type uses two Komatsu SDA16V160 type 16 cylinder turbocharged diesel engine, the total power is 4020 horsepower. The electric input voltage is 6600 volts, the total power is 2900 kilowatts, and the fuel tank capacity is 14000 litres. The model can be equipped with positive shovel and backhoe, with a maximum bucket capacity of 42 cubic meters. The maximum moving distance is 2.1 kilometers per hour. PC5500 is the two largest model of Komatsu banner, formerly known as DEMAG H455, with a total weight of 500 tons, a capacity of 21-36 cubic meters, and a total power of 1880 kilowatts.
EX8000 is currently the flagship model of Hitachi excavator. The first one was successfully developed in March 2004, mainly for Canadian mine users. Its cab is 10 meters from the ground, and the rear is equipped with kitchens. The machine weighs 780 tons and is equipped with two S16R-Y1TAA2 diesel engines with a total power of 3810 horsepower, an oil tank capacity of 14400 litres, a positive shovel capacity of 40 cubic meters, and a total price of about 84 million 600 thousand RMB. EX5500 is the second largest Hitachi model. It was launched in July 1998 with a weight of 518 tons and a two Cummins QSK45-6 diesel engine with a maximum power of 2642 horsepower. The bucket has a capacity of 30.6 cubic meters, and a shovel or backhoe can be installed. The excavating capacity per hour is over 3000 tons.
In September 2008, the German Liebherr group launched the R9800 crawler excavator at the Las Vegas Mining Exhibition in the United States. It is currently the second largest hydraulic excavator in the world, which can be called "one shovel under all shovels". Its total weight is 804 tons, equipped with 2 Cummins QSK60 diesel engines, with a total power of 4060 horsepower and an oil tank capacity of nearly 20 thousand litres. Bucket capacity of 42 cubic meters, can be equipped with positive shovel or backhoe. When the positive shovel is deployed, the maximum digging force can reach 2980kN, and the maximum crushing force can reach 2350kN. This makes R9800 competent for the most difficult mining environment. The first R9800 will be in service in Australia.
At this point, the world's largest hydraulic excavator has been on the stage, if according to the machine's weight ranking: -O&K RH400 with 980 tons of weight in the first place, Liebherr R9800 with 804 tons of weight in second place, Hitachi EX8000 to 780 tons in the third place, Demag H740 OS weight 744 tons fourth, Komatsu PC8000 The weight of 714 tons is fifth. From the perspective of bucket capacity, RH400 still takes the lead in its capacity of 50 cubic meters.
A comprehensive survey of the history of the world's mechanical development, the "Marion 6360" type mining shovel built by Marion in 1967 is 13600 tons, equivalent to 200 heavy tanks, with a total power of 21300 horsepower and a bucket capacity of 138 cubic meters, making it the largest mining shovel in the world so far. The 4250W type spatula built in 1969 by the Loews Corp, the United States, weighs 12258 tons, with a total power of 32000 horsepower, and the bucket capacity has reached an astonishing 168.2 cubic meters, becoming the largest pulling shovel in the world. Germany Krupp, O&K and other companies in the 70-90 years of the last century, the joint construction of a series of bucket wheel excavators, no one is not a miracle in the history of industry, and become a symbol of the industrial strength of all countries.
Compared with the giant excavator and dragline, the super large hydraulic excavator, though small, has a great technical content. As the super large hydraulic excavator is more adaptable and more efficient in mining, it has gradually replaced part of the load of electric shovel and pull shovel. As the world's largest coal producer, China has huge demand for mining machinery. If the domestic enterprises have the production capacity, it will develop the mining industry for China, save a large amount of equipment import cost and operation cost, and will greatly enhance the overall strength of China's engineering machinery industry.
In the tenth phase of the "people's pictorial newspaper" in 1958, the automatic double sided horizontal combined machine tool was designed and manufactured by ourselves, and the 3 cubic meter excavator developed by the Fushun heavy machine factory. The appearance of automatic combined lathe indicates that China has the ability to design and manufacture large-scale automated production lines. It was a great achievement in the year.
The 31 SY210 excavator exported to Russia, Irkutsk iron mine is located in the frigid region of 55 degrees north latitude, and the temperature has reached -15 degrees in September.
In 1961, the Poclain type TY45 hydraulic excavator, launched by the French company (Poclain), sold a total of 30 thousand units.
In 1969, the National Day 20th anniversary, the wheel rope excavator produced by Hefei mining machinery factory. In 1999, the plant was converted into jianghualong dragon forklift truck Co., Ltd.
The R9800 crawler backhoe hydraulic excavator launched by Liebherr group in 2008 ranked second in the world. Liebherr
Excavator assembly workshop of Liebherr (LIEBHERR) group, Germany
The Hitachi EX8000 crawler hydraulic excavator assembled in the oil sands area of Canada ranks the third in the world.
The DEMAG H740 OS crawler hydraulic excavator, launched by Demag in Germany in 1999, ranks fourth in the world. Its excavator business has been acquired by Japanese Komatsu.
The Japanese Komatsu PC8000 crawler hydraulic excavator, formerly known as the DEMAG H685SP type developed by Demag, Germany.
The Sino iron ore project in West Australia is one of the largest overseas resources development projects in China. It is jointly developed by CITIC Tai rich and Zhongye group (China smelter 20%). The total investment of the project is nearly $4 billion. The total open-pit mining method is adopted and 24 million tons of iron concentrate are designed for annual production. The project is planned to be put into production at the end of 2010. The giant iron ore is equipped with a large number of super large machinery, such as the world's largest RH400 hydraulic excavator, MT6300AC electric wheel dump truck, redo LeTourneau L-2350 wheel loader, and so on.
In November 27, 2012, the largest construction machinery exhibition in Asia opened in Shanghai New International Expo Center. Hunan ZOOMLION group, launched the largest ZE3000E type crawler hydraulic excavator in China, the whole machine weighs 298 tons, the engine power is 1044 kilowatts, and the standard bucket capacity is 17 cubic meters. The height of the whole machine is 7.6 meters, the width of the car is 7.8 meters, the track center is 5 meters, and the caterpillar grounding length is 6.3 meters. A single bucket can dig up 35 tons of material at a time, which is equivalent to lifting 30 cars. The maximum excavator is 1150 kilo (117 tons), the largest crushing force is 1070 kilo (109 tons), and the maximum horizontal thrust is 1123 kilo (115 tons).
