1. What caused the broken shaft of the screw conveyor?
There are many reasons for the broken shaft of the screw conveyor. Today, Tiantai conveyor manufacturers will analyze some common reasons and everyone:
1. Unequal pitch: After working for a period of time, if the pitch of the two chains is not equal, the pressure load will be concentrated on one chain;
2. The chain is too tight: it is usually loosened for a period of time. When the chain is tight, it is caused by the excessive tightness;
3. The machine groove is not straight: this will cause uneven stress on the two chains. When concentrated on one side, exceeding the load will cause the chain to break;
4. Manufacturing process problem: This is also the direct cause of the broken chain.
Second, the screw conveyor emergency shaft processing method
If the screw conveyor is aging or improperly operated, a sudden shaft break will occur. In this case, improper handling will affect the normal operation of the entire machine. If there is no matching conveyor shaft, how should the problem be solved as soon as possible? Because the spiral shaft is twisted and broken, it is difficult to find the correct connection if it is directly welded, and it will leave hidden dangers for the next break. Therefore, we adopt the method that the short shaft connects the breaking point and the outer sleeve is added. Repair measures: Grind the middle of the spiral shaft with an angle grinder without burrs to ensure that the overall length of the spiral shaft broken into two sections is less than 2 975mm. The two spiral shafts are numbered to make the short shaft and the sleeve. The short shaft is made of grade steel and has a length of 153mm. The sleeve is made from the original spare parts sleeve that has been quenched and tempered to ensure the toughness and strength of the sleeve. The part of the short shaft is inserted into the spiral shaft tube with a clearance fit; the diameter of the short shaft boss is equal to or slightly lower than the outer diameter of the spiral shaft; the principle for determining the length of each section is equal to or slightly longer than the outer diameter of the spiral shaft tube.
First put the two spiral shafts on the channel steel for straightening. One end of the short shaft is inserted into the spiral shaft tube, the boss of the short shaft and the spiral shaft are welded, and then the sleeve is sleeved on the spiral shaft. Then insert the other end of the short shaft into the spiral shaft tube, adjust the shaft sleeve to the middle position, and weld the shaft sleeve and the spiral shaft. Then the helical shaft and the short-axis boss are symmetrically spot welded at each hole of the shaft sleeve, and finally the shaft sleeve and the spiral shaft are welded.
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