Are the material of the compressor’s support ring and the main shaft bearing shells (Babbitt alloy) the same?
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This post was last edited by Black gold on 2010-8-23 21:17. The support rings for the first three stages of the compressor in our workshop are all made of babbitt; is its composition the same as that of the babbitt used in the spindle bearings? The temperature limit for the main shaft bearing is 60 degrees, but the temperature of the cylinder can reach 140 degrees. I would like to ask everyone what the reason is?
The babbitt lining on the main shaft bearings is usually just a thin layer; high temperatures can easily cause it to be damaged. As for the support ring you mentioned, it’s an entire ring made of babbitt, so I think its strength will be better. However, for compressor support rings, we generally use materials such as PTFE or carbon fiber
A higher cylinder height has no decisive effect on the temperature of the bearing shells. The bearing shells are lubricated by lubricating oil, and it is fine as long as the temperature of the oil returning to these bearings does not exceed 100 degrees
May I ask whether the babbitt used by your company is tin-based or lead-based? ! For bearing bushings made of babbitt, the main factor that limits their performance is the applied load; as you mentioned, the operating temperature can be adjusted through the cooling effect of lubricating oil……
3# Wen Jianyu: The temperature is too high; could the lubricant easily carbonize?
I think you may not be very familiar with this: the support ring cannot be entirely made of babbitt alloy; it can only have a coating on it. The reason why the support ring can withstand higher temperatures than the bearing shells is that the heat generated by it can be carried away by gases. The temperature of bearing shells must not exceed 65 degrees – this is a measure of protection, and it’s not related to the melting point of babbitt alloy; 140 degrees is no problem at all.
Could 140 degrees be due to damaged thermocouple contacts? Under normal conditions, it shouldn’t be that high
Babbitt metal has excellent wear resistance. The spindle bearings are lubricated and cooled, with a temperature of 60 degrees, which is within a reasonable range. As for the cylinder temperature, I feel it’s a bit high; I’m not sure what gas is being compressed. It’s necessary to compare this value with the usual process parameters. If the temperature is too high, valve problems might be the cause
Babbitt alloy? I’ve never heard of it. Is there any detailed information? Thank you!
Babbitt alloy – just search for it on Baidu to find out~~
Under normal conditions, it is possible for the cylinder temperature to reach 140 degrees; babbitt alloy does not melt at that temperature either, so you can use it with confidence. However, the temperature should not go any higher