What May Limit Rotating Speed of Raymond Grinder?

Main structure of Raymond grinder, which is one main kind of crushing mills, is a bowl of ring, roller using mechanical spring load pressure increase grinding force, material feeding bowl shaped by the center ring by rotating centrifugal force in grinding roller.Roller roller fixed on a rocker arm can be a one-way activity, each radial grinding force is controlled by adjustable spring.The improved ventilation of the Raymond mill system has positive pressure and negative pressure straight down in two ways.




E.C.L oesche a shareholder and director of Curt Von Grueber machinery factory decided to purchase the public after Raymond centrifugal ring roller crushing mill patents, production out of the first generation of Raymond mill system.Its structure is in the center of the crushing mill machine to erect a root with the rotation of the spindle with the plum blossom, plum blossom hanging rack three or more since the ZhuanMo roller, the axis of rotation at a certain speed rotating roller swing outward, and the centrifugal force driving down to the grinding ring inlaid on the inner wall of the cylinder.Material into the grinding zone in the feed roller at the bottom of the plough shape under the action of blade was taken to the roller, the former area.Because of crushing mill coal slow roll grinding force (centrifugal force) is limited by a roller roller diameter and rotational speed, the grinding at the time is only applicable to soft, low ash and coal quality material with good sex of grinding, and Germany's coal is hard, ash content and high, need higher grinding force and the structure of Raymond crushing mill is difficult to meet the requirements of grinding, hence Raymond coal mill not gained popularity in Germany.

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