Recently, large-scale mechanized mining of coal has realized large-scale centralized washing. Due to various constraints such as national environmental protection, safety and economic benefits, large-scale coal mines and supporting coal washing plants have become an inevitable trend of new projects. mineral sizers with its high crushing efficiency, large processing capacity, low operating cost, high blocking rate, good discharge type and low over-crushing rate have been widely used in primary crushing of raw coal in major mines and secondary and tertiary crushing of raw coal in coal washing plants. The production capacity of the supporting crushing equipment required by the large-scale mine and coal washing plant has increased. The complex crushing conditions of the mine, such as complex incoming materials, uneven particle size of incoming materials and large amount of gangue, require that the supporting crusher must be mineral sizers capable of providing sufficient strength. mineral sizers are generally double-toothed roller crushers, using a split box structure, that is, the bearing positioning is independently positioned by an independent bearing seat, and the crushing chamber provides an independent crushing space for the crushing operation. In the case of severe crushing conditions such as large crushing capacity, large feeding particle size, large crushing ratio, high hardness of crushing materials, and iron debris entering the crushing chamber, the independent bearing seat cannot provide sufficient axial radial reaction force, and there will be problems such as slight swing of the bearing seat, flailing of the crushing roll along the axial diameter, and unstable bearing positioning, which seriously affect the service life of the bearing. The reliable performance of the equipment is reduced. We design and provide an integral box structure of mineral sizers positioning bearing seat, which can offset the axial diameter reaction force generated by the crushing roller during the crushing process, ensure the bearing positioning firmly and reliably, and will not produce axial diameter runout or movement, improve the service life of the bearing, and solve the problems existing in the background technology. Comprising bearing seat 1, crushing chamber side plate, crushing roll device, bearing, base and bearing seat 2, bearing seat 1 and bearing seat 2 are provided with two bearings, the two bearings are located on the same horizontal plane, bearing seat 1 and bearing seat 2 correspond to each other, bearing seat 1 and bearing seat 2 are fixed on the base respectively by bolts and positioning pins, and are arranged in parallel symmetry. Bearing seat one and bearing seat two ends are respectively through the crushing chamber side plate fixed connection, the whole is box-type structure, box-type structure is provided with crushing roller device, the crushing roller device contains two crushing rollers and crushing teeth, two crushing rollers on the same horizontal plane, parallel arrangement, crushing roller both ends are located on the bearing, crushing roller and reducer output shaft connection, reducer connected drive motor. The crushing roller is uniformly provided with a plurality of crushing teeth, and the crushing teeth are provided with an Angle with the crushing roller line.
The crushing chamber side plate and bearing seat 1 and bearing seat 2 are fixed and connected by bolts. mineral sizers break the material by cutting, stretching and squeezing the crushing teeth. The strong axial and radial forces generated during the crushing process are offset by the overall box-type structure, which ensures the solid and reliable bearing positioning. The beneficial effect is: to solve the problem of weak positioning of the bearing seat, the overall box-type structure offsets the strong axial radial force generated in the crushing process, extends the service life of the bearing, and improves the reliable performance of the equipment.