| 摘要 |
PROBLEM TO BE SOLVED: To attain efficient and stable operation even with the increase of the degree of pulverization by simultaneously suppressing the vibrations of at least 2 vibration bands of the vibration of low-frequency band and the vibration of high frequency band. SOLUTION: This roller mill is used for pulverizing a material to be pulverized by pressing a roller for pulverizing to a pulverizing table side with a hydraulic system. The hydraulic system is constituted of a rod side hydraulic chamber 30 and a head side hydraulic chamber 40, which are separated by a piston 21 in a hydraulic cylinder, a rod side and a head side hydraulic sources 34, 44 and hydraulic pipe lines 31, 41, which are the lines for supplying a hydraulic medium respectively to hydraulic chambers 30, 40, a pressure rod 13 and a pivot arm 12, which transfer the hydraulic force applied to the piston 21 to the roller 2 for pulverizing, and a 1st and a 2nd accumulators 33, 43 and a 1st and a 2nd flow control valves 32, 42, which are provided respectively in the hydraulic pipe line 31, 41. In such a case, the vibration of each band of the low-and the high-frequencies is individually attenuated by individually control each flow rate by the flow control valve 32 or 42.
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