Technical improvements
Thread Content
This workshop has a fermentation tank equipped with a stirring mechanism that is driven by belts. There is a short shaft, and when it is connected to the pulley, a steel plate is pressed in place by screws to hold the upper pulley in position; the upper pulley is then connected to the lower pulley via screws. The screws that hold the upper pulleys in place experience forces resulting from the rotation of the short shafts and the forces acting between the pulleys, which is why the nuts often break. I’m not sure what improvements can be made; I’ve also tried increasing the size of the bolts, but that didn’t solve the underlying problem. The mixer speed is 970, at normal pressure and room temperature.
It seems like you haven’t explained things clearly. Send me a photo; I have nothing to do these days, so I can help you figure it out. It’s possible that you’re involved in some technical improvements, and your boss is part of that process. It would be best if you notified me via text message – I’m online every day, from 9 a.m. to 5 p.m. It's better to add a note under the photo. Trust me
He’s in the second grade just like me, so he can’t upload any materials
No problem. As can be seen above, it’s the QQ number; he can just add him then
From what the original poster says, is it a bolt that passes through the upper pulley and the side of the short shaft to connect them together? But why is it a broken nut? Is it a typo?
Minor improvements: larger bolt and nut specifications as well as enhanced material properties; the original 6.8 grade is replaced with 8.8 or 12.9 grade. Making major improvements is a hassle: calculate the torque, check the strength, select a structural design, then conduct further calculations, and only proceed with implementation once all calculations are successful.
Replacing them with stainless steel nuts of higher strength should be feasible.
Replacing the bolts can solve part of the problem, but you need to find the real cause of the break! What I’m thinking is that the bolts are subjected to too high alternating stresses; this should be where we start!
Hehe, there’s been some unusual noise at that bolt these past few days; it seems like it’s about to break again
Attempts were made to increase the size and strength of the bolts, but the range of increase was limited, and the effects were not very significant. I can’t upload photos right now; once it’s upgraded, I’ll upload them and everyone will be able to see them easily.
It is likely that your mixing device does not have a separate fixing mechanism; instead, it uses a suspended mixing shaft. When the shaft is heavy or the material being mixed is viscous, the bolts at the connection points can fail. We need to know the actual situation first.