(l) The raw material of the human mill is coarse, and the amount of feed is not effectively controlled. At present, Raymond Mill 4R and SR use ordinary jaw crusher to crush large blocks of raw materials. Generally, they are crushed from Zoomm to 25-40mm. Because the raw materials are thicker and larger, the vibration of the roller is larger when the roller is rolled. The production efficiency is low, and the feeding adopts the electromagnetic vibrating feeder, which is generally controlled by experience. In order to avoid the pressure chamber blocking, the state of “eat half full” is usually adopted, which affects the powder discharging efficiency.
(2) The roller and the grinding ring in the Raymond main machine are fed by the blade. The continuous rolling of the raw material is the main link of the grinding machine. The centrifugal force of the suspension roller device hanging on the plum blossom frame during the rotation of the main shaft Under the action, the roller is pressed against the grinding ring, and under the action of the friction force, the roller is rotated. The rotation of the roller that is pressed against the grinding ring forms a main mechanism for the crushing process of the raw material. However, this apparent lack of pressure is one of the main reasons for low production efficiency and high vibration noise. Therefore, many manufacturers are currently trying to increase this positive pressure, such as the use of pressure springs and hydraulic cylinders, but this way As a result of the complexity of the equipment and the increase in price, the traditional Raymond mill's free-swinging structure of the suspension roller can freely avoid some hard, hard-to-crush large pieces during the movement, although it reduces some production efficiency, but However, the grinding roller device is protected from damage, so the simple and feasible method is to increase the centrifugal force, Fr m02. It is known that the centrifugal force depends on the equivalent mass m and the rotational angular velocity of the grinding roller device. Therefore, to increase the force of separation, it is necessary to increase the equivalent mass of the grinding roller device and increase the speed of the spindle, but this depends on the power and structural reliability of the main engine.