Regarding the boiler exhaust fan
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Dear friends: Hello everyone! The felt oil seals in the bearing housings of the boiler exhaust fans in my company keep leaking oil. Is there any better way to solve this problem?
It usually has this structure; it’s better to check the quality of your spare parts and maintenance work
Check the bearing eccentricity, and also filter or change the oil regularly
It’s sufficient to change the type of scaling; there are two types available now – one is fixed, and the other is a movable gland type.
Hehe, here’s a secret tip for the original poster: mix engine oil with butter to create a paste with appropriate fluidity, thereby increasing its viscosity, and then pour it into the bearing housing. As for the ideal viscosity level, you’ll need to try it a few times to figure it out; under normal conditions, there should be no leaks.
Replace the oil seal, or change the sealing method
It can be changed to a comb-toothed oil seal divided into two halves, provided that the shaft vibration is not excessive; otherwise, a gap of 0.2 mm cannot ensure sufficient wear protection.
Generally, lubricating oil of the appropriate viscosity is selected based on the season, and the seals are replaced regularly.
Here’s a method: wrap some electrical tape around the inner ring of the bearing cover.
After replacing the oil seal, leakage usually doesn’t occur; otherwise, a lubricant with high viscosity or one that is a combination of solid and liquid substances can be used
Best solution: 1. Install an oil baffle ring inside the bearing housing. 2. If the shaft is horizontally arranged, modify the bearing housing cover to create oil return grooves. Let me explain: felt is used to prevent dust, not to seal oil.
Agreed; we encountered this situation before as well, and after some research we resolved it in this way
Replace it with an oil seal featuring a sparse tooth pattern; if space permits, add an oil baffle before the seal (in two halves, with the lower half including an oil return hole). ), the effect will be better.
The problems with processing quality are likely due to shaft eccentricity
What was said upstairs is excellent; these are basically the solutions. Our company uses a packing and gland system; the packing is made of 4-fluoro packer, which is wear-resistant. Enough packing should be left so that it can be tightened further in the future – if there is a leak, it can be tightened more, and it works very well.