Configuration

Cylinder body
This machine is a horizontal cylindrical rotating device, mainly composed of cylinder body, grinding door, and lining plate bolts. The main faults are cylinder bolt leakage, grinding door leakage, and cylinder bending. Considering the low temperature of the cement mill, cylinder bending rarely occurs. However, due to the fine grinding of cement, cylinder bolt and grinding door leakage often occur. Therefore, it is required that we arrange personnel to tighten the cylinder and grinding door at any time when the mill is shut down Lining board
The lining plate is used to protect the cylinder body from long-term impact and friction damage, and can also adjust the movement state of the materials inside the grinding. During inspection, the main focus is on checking the wear condition of the lining plate and whether the lining plate bolts are loose or falling off, in order to avoid excessive wear of the lining plate, which may cause changes in the material movement state and reduce the production capacity and lifespan of the cylinder Compartment board
The compartment plate is mainly used to divide the grinding medium, prevent the axial movement of the medium, prevent oversized particles from entering the next compartment, and ensure reasonable grinding of materials. It can also control the filling degree, material flow rate, and grinding speed of materials in the mill The main components of the partition plate include the center circle, guide cone, grate plate, lifting plate, lining plate, partition plate bracket, blind plate, etc. During the inspection, the main focus is on checking whether the bolts of the compartment plate are loose or falling off, whether the grate plates are intact, whether the grate gaps are blocked, whether the grate plates and blind plates are worn too much, whether there are cracks in the compartment plate bracket, whether it affects the grate plates, and whether there is any ball passing phenomenon Main bearing
Bearing the weight of the rotating part of the mill and the impact of the grinding medium, the mill is supported on the main bearing through a hollow shaft. The bearing seat has a bearing cover, observation holes (to observe the operation of the oil supply, central control shaft, and bearing shell), and a thermometer for temperature measurement. Bearing lubrication adopts two types: dynamic pressure lubrication and static pressure lubrication. Dynamic pressure is supplied by a low oil pump. Due to the low speed of the mill, the oil film formed by dynamic pressure is thin and cannot achieve liquid friction lubrication. Therefore, static pressure lubrication is used. A dedicated high-pressure oil pump supplies high-pressure oil to the oil bag, and a thicker oil film is formed by the pressure of the oil. During normal operation, static pressure lubrication works while dynamic pressure lubrication is stationary. When there is a problem with static pressure, dynamic pressure automatically works. The allowable temperature for general bearing liners is not more than 70 ℃, otherwise tile burning may occur, so cooling methods must be taken. The main inspection is to check whether there is vibration and abnormal noise in the major oil pumps of the parts, whether the oil level and quality of the oil tank are normal, whether there is oil leakage, whether the main bearing of the mill and the low-pressure pump pressure should be above 0.1MPa, and the flow rate should reach 35l/min or above. Observe whether the oil film of the major oil pump is intact Feeding and unloading device
The feeding device is used to smoothly feed materials into the mill. Generally, there are chute feeding devices, spiral feeding devices, and spoon wheel feeding devices. The chute feeding device requires that the inclination angle of the chute must be greater than the angle of repose of the material to ensure the smooth flow of the material and prevent the hollow shaft from being washed away by the material. Fill concrete between the conical sleeve and the hollow shaft. The spiral feeding device is used for mandatory feeding, with a large feeding amount, but it is prone to wear and is suitable for long mills. The feeding amount of the spoon wheel is large. The unloading device consists of unloading grate plate, guide cone, lifting plate, discharge sleeve, transmission pipe, cylindrical screen, unloading cover, coarse slag pipe, etc Transmission device
Composed of fast motor, slow motor, slow reducer, and fast reducer. Main inspection contents: Check for overheating and abnormal noise in the main reducer oil pump, check for normal pressure gauges and temperature indicators, and check for oil leakage in the pipeline; Adjust the oil level and color of the fuel tank, and adjust the flow rate of the oil cooler according to the season; Check for abnormal noise, overheating, and vibration in the main motor oil pump, whether the pressure indicator is normal, whether the oil level and color in the oil tank are normal, whether there is overheating, vibration, or abnormal noise in the main motor cooling fan, and whether the suction port filter is well ventilated; Is the temperature of the main reducer tile normal, are there any abnormal noises from each coupling, and are the bolts loose.

Working principle

This machine is a cylindrical rotating device, driven by external gears, with two compartments and a grid type ball mill. The material is uniformly fed into the first compartment of the mill through the feeding device and the hollow shaft screw. The compartment is equipped with stepped or corrugated lining plates and contains steel balls of different specifications. The rotation of the cylinder generates centrifugal force, which brings the steel balls to a certain height and then drops them, causing heavy impact and grinding on the material. After the material reaches rough grinding in the first warehouse, it enters the second warehouse through a single-layer partition plate. The warehouse is lined with a flat lining plate and contains steel balls for further grinding of the material. The powdered material is discharged through the discharge grate to complete the grinding operation.

Technical Parameter