What kind of clearance bearing should be selected for the roller bearing of wood pellet machine? For many customers, due to improper adjustment of the gap between the ring die sawdust pellet machine press roller and the mold, if the gap is too large, the particle forming degree is poor, the hardness is not enough, and if the gap is too small, if the pellet machine operates for a long time, the mold will be over-stressed for a long time. Large and lead to damage. Therefore, the user should strictly follow the manufacturer's instructions to adjust the die gap.
There are 2 pressing rollers (including turn rollers) in the ring die of the pellet device. 2 supporting shafts and a front plate; one end of the supporting shaft is fastened to the seat plate with threads, and the other end is respectively connected to the two holes in the middle of the front plate to support the front plate, and the front plate supports the cantilevers of the two pressing rollers The end plays a fixed role (the cantilever shaft end of the pressure roller has a swinging angle y1, so it needs to be fixed by the front plate). There are assembly gaps B1 and B2 between the two pressing rollers and the ring die. When the ring die rotates, the two pressure rollers rotate with the ring die. When the powder is fed into the extrusion zone formed by the ring die and the pressure roller, it is gradually extruded and extruded from the ring die hole to form pellets.
The clearance value of the pressure roller bearing of the wood pellet machine should be selected from the C4 and C5 groups of the bearing. This value is suitable for the bearing, the shaft and the housing hole with a tighter interference fit than the normal fit or the inner ring and the outer ring of the bearing. In mechanical parts with large working temperature difference, if a bearing with too small clearance is selected, due to inconsistent thermal expansion coefficient and too small running clearance during use, the bearing itself will be overheated and burnt out. Therefore, when selecting a bearing, attention should be paid to the bearing clearance. value.