clearance of 5 tilting pad journal bearing
clearance of 5 tilting pad journal bearing
(OP)
hi everybody
we have 5 tilting pad journal bearing. in documents assemble clearance is 0.12_0.14 mm. this clearance is okay but when we install this bearing in our compressor clearance reduced extremely about 0.09 mm. so why and what can we do?
we have 5 tilting pad journal bearing. in documents assemble clearance is 0.12_0.14 mm. this clearance is okay but when we install this bearing in our compressor clearance reduced extremely about 0.09 mm. so why and what can we do?





RE: clearance of 5 tilting pad journal bearing
Johnny Pellin
RE: clearance of 5 tilting pad journal bearing
RE: clearance of 5 tilting pad journal bearing
Johnny Pellin
RE: clearance of 5 tilting pad journal bearing
RE: clearance of 5 tilting pad journal bearing
yes bearing halves bolted to each other. lifting the shaft is ok due its light weight. pivots are point contact and bearings are fit in housing completely. housing are align but im not sure about crush. is it real can reduce clearance?
how are other tilting pad behavior? are they same clearance in 2 method?
thanx agane
RE: clearance of 5 tilting pad journal bearing
RE: clearance of 5 tilting pad journal bearing
Johnny Pellin
RE: clearance of 5 tilting pad journal bearing
we use double dial indicator two side of each bearing and calculate average.
so i think we must focus on Excessive crush as you said and can i say in journal tilting pad bearing assemble and non assemble clearance MUST be same in correct conditions?
RE: clearance of 5 tilting pad journal bearing
I assume that you have verified that the mandrel you used has the same diameter as the shaft journal.
Johnny Pellin
RE: clearance of 5 tilting pad journal bearing
so like you i think answer of question is in our previous chat. thank you again Johnny Pellin
RE: clearance of 5 tilting pad journal bearing
is this centrifugal compressor with over hang impeller ?
I had a same experience if its over hang compressor the shat movement has to check in both directions down and up.
why don't measure the crush?
RE: clearance of 5 tilting pad journal bearing
i heard two Definition about it.
1.it is clearance between top bearing and ID of housing
2.it is clearance between upper and lower housing while upper housing bolt tight with hand
i know actual that two are same but what is your suggestion or prefer?
RE: clearance of 5 tilting pad journal bearing
Upper bearing OD and the bearing housing. Probably negative clearance.
The second measurement could be made with hand tools and feeler gages with the machine mostly assembled.
RE: clearance of 5 tilting pad journal bearing
i dont know any idea about ID (housing bore) but bearing OD is 110mm and CM said it has looseness in system.
so dose it has any reference to determination clearance? what can i do?
RE: clearance of 5 tilting pad journal bearing
Johnny Pellin