Cast Steel Ball Mill End Cover With Large R Rounded Corners CITIC HIC Machine Parts

High-Quality Cast Steel Ball Mill End Cover With Large R Rounded Corners

Product Introduction Of CITIC HIC Machine Parts

The end cover of the ball mill is an important component of the ball mill, located at both ends of the cylinder. Its main function is to support the materials, the cylinder and the medium, and to bear the force and moment generated during the operation of the ball mill. The design and manufacturing quality of the end cover directly affect the overall performance and stability of the ball mill.

The inlet and outlet end covers of the ball mill are one of the main components of the ball mill produced by our factory. The material of the end cover is ZG270-500.

The strength of the dangerous section of the ball mill end cover is the first issue to be considered in the design and selection of the end cover, because the rather heavy ball mill cylinder is supported by the end cover on the main bearing.

The end cover of a ball mill is generally slightly conical in shape. This design takes into account the configuration of the main bearing, the bending resistance of the journal, and to prevent the large gear from colliding with the foundation of the main bearing. The end covers of large and medium-sized ball mills are mostly made of cast steel, while those of small ball mills are made of ductile iron. To ensure the concentricity of the end cover's axis and the cylinder's axis, the end cover and the journal are usually cast as one. However, when the capacity of the smelting and casting equipment is insufficient, they can also be cast separately, processed and then fastened together, and finally undergo mechanical processing.

When determining the end cover journal section, it is necessary to take into account in advance whether the ball mill is driven by gears (straight teeth, helical teeth or herringbone teeth). Due to the horizontal error of the axis during installation, the ball mill may generate certain axial forces during operation. Therefore, in order to prevent the cylinder from moving axially under the action of axial forces and affecting the normal operation of the gears, it is necessary to fix the journal. However, as the cylinder will elongate due to heat and become difficult under the action of the load, in this case, it is necessary to make it possible for the cylinder to expand and contract. In this way, of course, the two journal shafts of the cylinder cannot be fixed simultaneously. Only one of them can be fixed, and the other is called the movable free end.

To achieve this purpose, in the design, one journal is usually equipped with protruding shoulders, and the distance between the two protruding shoulders is exactly equal to the length of the bearing bush. The other journal has no protruding shoulders and its length is 5-25 millimeters longer than that of the bearing bush. For short cylindrical mills, since the cylinder is not long, any journal can be selected as the fixed end. However, for long cylindrical ball mills, the journal close to the gear ring must be selected as the fixed end. In this way, the axial misalignment of the gears will not be caused by the deformation of the cylinder.

It should be pointed out that the two end covers of the ball mill have different uses: one is the feeding end cover and the other is the discharging end cover.

Product Parameters Of CITIC HIC Machine Parts