Must spring washers or other shims be used for the fan bearing housing and motor foot bolts?
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What will be the consequences if it isn’t added? Is it the vibration or loose bolts? Thank you
Flat washers and spring washers should be added to provide shock absorption and prevent rotation.
Shims and spring washers must be added to prevent loosening due to vibration
If no additional measures are taken and the components are connected directly with nuts, then due to this rigid connection, over time as the equipment operates, the nuts will gradually loosen as a result of the vibrations generated by the equipment. This in turn increases the vibrations, further exacerbating the loosening of the nuts, until eventually they fall off and the equipment gets damaged. By using spring washers, the elasticity of these washers can help reduce the likelihood of nuts coming loose, thereby ensuring the long-term operation of the equipment. Of course, if the nut has a self-locking function, then a spring washer is not needed.
The answer on floor 5 was very good. To add something, elastic washers are used primarily to increase the pre-tightening force and thus prevent nuts from loosening, while flat washers serve to cover larger holes; they do not prevent loosening.
If the self-locking nut is removed, is the nut then useless?
Disc springs offer better shock absorption and anti-loosening effects, so they are recommended.
I’m not as good at theory as they are; I only talk about practical things. It would be great if there were more of that, but is it okay if you decide not to include it? Will it cause a parking issue? I tell you, it has no impact ； Sometimes, during major overhauls, things get busy and chaotic, which means that gaskets are often present when something is taken apart, only to be lost when it’s time to reassemble it. In reality, it’s not a problem if they’re not there; of course, it’s better if they are available. Some might say, aren’t you worried that over time the nuts at the base might loosen and cause problems with the equipment? I tell you, if the nut in the bearing housing can even loosen, how can the bearing inside still be in good condition? For this type of equipment, inspection personnel check the temperature of the bearings and the level of vibration on a daily basis. In short: yes, it’s best to install one ； No, it will not cause the vehicle to stop. . .