Regarding the issue of loose shaft head bolts in shielded pumps
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The medium is ethyl acetate, which is somewhat corrosive. It has been found that the bolts at the front and rear shaft ends of the shielded pump are loose; even with thrust washers in place, there is still looseness. The dimensions of the shaft end holes were found to be acceptable when checked with plug gauges, and the dimensions of the bolts were normal as measured by ring gauges. So the question is: what is causing the bolts at the shaft ends to become loose? ^(*￣(oo)￣) Note: The base material of the shielded pump is 316L
1. Check the operating temperature. 2. Check the bolt material. 3. Check whether the safety device is reliable. 4. Check if it vibrates during operation.
How do you handle this medium after stopping the pump each time?
Loose at both the front and back. Could it be that the brake shims are installed in the wrong direction?
It can be used at high temperatures; if the preload on the nut is insufficient, it may loosen, so the preload needs to be increased.