in china, the modern machinery is broken in steam engine and electric motor and power machinery gradually improve and promote one after creating it.if you would like to buy the pg电子下载-pg电子游戏 ,piston motor,hydraulic winch,gearbox,hydraulic steering unit products,ningbo zhongyi hydraulic motor co., ltd absolutely is your best choice. in 1806 with steam engine drive appeared the roll crusher; in 1858, the american black invented the broken rock of the jaw crusher; in 1878 the united states has broken the continuous development of the action, and the spinning back crusher production efficiency higher than intermittent movement for broken jaw crusher; in 1895, the united states has a low power consumption of invention impact crusher.
at the same time, grinding machinery also had the corresponding development, 19 century appeared extensive use of ball mill; 1870 in ball mill, and on the basis of the development of granularity of discharging rod milling machine; 1908 years and created a need not grinding media since the mill. the twentieth century 30 to 50 s, the united states and germany have developed the roller bowl of coal mill, roller plate type middle speed coal mill vertical shaft coal pulverizer etc.
these broken mechanical appear, greatly improving the crushing homework effect. however, because of the crushing characteristics of various materials with each other, different industries to differences of particle size requirement also products differently from each other, and he has created a different principle according to crush the homework duozhong broken machines, such as wheel grinding machine, vibration grinding, turbine crusher, airflow crusher, fan coal mill, sanding machine, colloid mill, etc.
in the 70 s, has developed output per hour for 5000 tons, material, the largest measuring 2000 mm large spinning back crusher, and can be fine grinding material to less than 0.01 microns in size of the colloid mill.
solid materials with mechanical shattered the main method has five kinds, namely extrusion, bending, fracturing, grinding and impact. the first four kinds of all is the use of static, and finally a apply kinetic energy. in the vast majority of the stave machinery, material often in two or more under the action of crushing method is shattered, for example, in spinning back crusher, main application extrusion, fracturing and crooked; the ball mill, the main application in shock and grinding.
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