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The air shaft and the discharge spiral flange joint bolt are frequently fractured. In handling this fault, in order to avoid the ball mill for a long time, it can be quickly resolved by reasonably controlling the method of assembling the assembly gap of the spiral assembly region by reasonably controlling.
Scheme 1: Replace the discharge spiral through the new spiral, strictly control the size error of the spiral and the hollow shaft assembly site to ensure that the uniform assembly accuracy is fitted with the hollow shaft, eliminate the connection The non-unbearable load at the flange.
Solution 2: The fit of the discharge spiral and the hollow shaft is fixed from the external setting point, and the suspended portion of the hollow axis is fixed. The bolts are welded on the three splices of the spiral to make it a whole with the spiral to contact the hollow shaft in contact with the hollow shaft contact with the hollow shaft. Using these three bolts as a support point in contact with the hollow axis, when the three bolts are tightened and closely fitted to the hollow shaft, the spiral is naturally fitted with the hollow shaft, thereby avoiding the discharge spiral in the discharge hollow shaft. There is a hanging phenomenon in
SPORT: The cooperation of the fastening spiral and the hollow shaft must be completely solved, and the structure of the hollow shaft and the spiral can be modified. In the air shaft and the discharge end of the spiral, an assembly site (as shown in Fig. 4) is added, and the spiral and hollow shaft are assembled, and the hollow shaft and the spiral assembly gap are reduced. Big, spools of spiral, avoiding the spirals to produce a concentrated non-equilibrium load at the hollow shaft connection flange.
There are two problems in the scheme, one is due to the difference in wear due to the assembly site of the hollow shaft and the spiral, the assembly size measurement is large, and the precise spiral cannot be determined. The size of the cartridge is large, the processing is large; the second is that the discharge spiral process is longer (with a blank, the manufacturer is 5 ~ 7 days). Solution two easy operation, the ball mill inspection repair and shuttles can be handled in less than 2 hours, but due to the simple structure, it may have a tight phenomenon. The Solution 3 is that the hollow shaft and the discharge spiral control are more difficult to control, but after the structure of the hollow shaft and the spiral, the hollow shaft and the discharge spiral flange are in the joint bolt. Uniform load, there is no stress concentration, which can fundamentally eliminate the root root of the bolt of the bolt in the ball mill.
