Hello. Friends, please help me in the design of the tilting pad radial bearing.
I did not find any useful information about the curvature of the back of the pad in these bearings. Apparently, this curve is called backland. What are the design principles of this curve based on?
Hello everyone, I'm currently working on fitting a hydraulic press gear onto the main shaft of a gearbox, and I could use some guidance on the calculations and procedures involved. I'm looking for advice on how to properly calculate and execute the installation of a hydraulic press gear onto the...
Hi guys
I saw a multistage centrefugal pump yesterday and two things surprised me.
1- one side of pump has radial journal sleeve and other side has two angular contact bearing with also radial journal sleeve too. Is it correct? As you know anti friction bearings don't have axial clearance and in...
Hi guys
I have a question about stud bolt of high speed impeller rotor.
Actually we have high speed compressor (about 40000rpm) in our plant. After some year we change impeller due high erosion, with new one.
We know amount of impeller torque of stud and because of high defection, it's tight and...
Hi guys
i am a little confused in tilting pad journal bearing curves.
i know concept of preload and design factors in pads curve in Babbitt side (shaft side actually) but what is radius of back of pads? (in attached file is named R out)
as we know in pivot type, back of pads contact with...
Hi friends.
do you have any plot of bad bearing damping (tilting pad, simple journal, multi lobe ...).
its interesting for me to know bad damping signs in vibration behavior.
Hi
how can i design rolling element bearing for defined load and speed?
absolutely it have limits and procedure.
i need it for bear 200KN and 3000 rpm speed.
Hi everybody
i observed high speed compressor with high 7x (1x,2x,...,7x). machine semiopen impeller has 7 main blade too.
this is my question: is it any relation? and what can rise all x?
(x means 1rpm of rotor)
Hi
we have 3 stage integrally geared compressor.
after unbalance 3th stage it change with new one and 3th bearings change too but it trip after start because of high vibration on 3th stage.
3th stage rpm: 40000 1th and 2th critical speed: 11000 - 34000
bearing: tilting pad with 5 pads. load...
Hello everybody
1. when do we need high speed balance exactly in industry?
2. is it possible a balanced rotor in 40000 rpm (above second critical speed), show unbalance in 3000 rpm balance machine؟
we have 16kg shaft of compressor with 40000 rpm. if in document balance grade Is written 2.5G , is it mean 2.5 is acceptable for balance in 40000 rpm?
can we Equivalent this balance speed with another rpm?
if yes, how? and what can we do this equivalent?
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 had 3 lobe journal bearing in a machine with 45000 rpm. after many years bearing change with new one but second bearing was not 3 lobe like another one and it change wrongly. actually it was simple journal bearing just with 3 oil grooves and it was just look like 3lobe bearing!!!
but machine...
