Daren Samy
Mechanical
thread821-498052
I have recently worked 04 vertical pumps. In older pump, there is no thrust bearing in pump. There are only hard rubber/graphite (BBF6) guide bearings. On NDE side of motor, Spherical taper roller bearing is installed to cope downward thrust. On DE side, deep groove ball bearing is installed to manage momentary thrust. On other three pumps (relatively new installed of same company), there are back-to-back angular contact ball bearings in pump to cope axial float of pump. Motor has deep groove ball bearing on NDE and roller on DE to see motor axial thrust. All the four vertical pumps have
3 impeller
Flow Rate : 750 ton/hr
Head Required: 2.7m
Coupling: Flanged Fixed
Wear ring radial clearance: 0.27mm min to 0.55mm max
Total float of old pump is 11-13mm
Total float of relatively new pump is 9-11mm
Which one is safer design ? Does the new pump shaft will not be in compression instead of tension as general rule?
Daren!
I have recently worked 04 vertical pumps. In older pump, there is no thrust bearing in pump. There are only hard rubber/graphite (BBF6) guide bearings. On NDE side of motor, Spherical taper roller bearing is installed to cope downward thrust. On DE side, deep groove ball bearing is installed to manage momentary thrust. On other three pumps (relatively new installed of same company), there are back-to-back angular contact ball bearings in pump to cope axial float of pump. Motor has deep groove ball bearing on NDE and roller on DE to see motor axial thrust. All the four vertical pumps have
3 impeller
Flow Rate : 750 ton/hr
Head Required: 2.7m
Coupling: Flanged Fixed
Wear ring radial clearance: 0.27mm min to 0.55mm max
Total float of old pump is 11-13mm
Total float of relatively new pump is 9-11mm
Which one is safer design ? Does the new pump shaft will not be in compression instead of tension as general rule?
Daren!
