Axial force distribution problem in boiler feed water pumps
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I need help from everyone: 1. The new boiler feed pump in my company is equipped both with a balance sleeve and a balance disk, as well as thrust bearings. How is the axial force distributed in this case? . 2. After the balance sleeve and balance disc are installed, how do I install and adjust the thrust bearing clearance?
Generally, it consists of a balance disc and a balance drum; most of the axial force is balanced by the balance disc and the balance drum, while the remaining part is taken care of by the thrust bearings
During pump startup, all axial forces are borne by the bearings; during normal operation, they are borne by the balance disk and balance sleeve
It is generally believed that during normal operation, 70% of the axial force is carried by the balance disc and balance sleeve, while 30% is carried by the thrust bearings. However, during startup, it is mainly the thrust bearing that bears the load.
There are also balance discs and balance drums, forming a balance disc-drum structure that bears all the axial forces. The thrust disc is used only during startup and shutdown; during adjustment, it is advisable to leave a gap of around 0.1–0.12 MM between the balance disc and the grinder, after the thrust disc has made contact with the bearing surfaces.
Balancing a shaft eliminates most of the axial forces; the remaining forces are eliminated by thrust bearings or bearings such as deep groove ball bearings.
Thank you! What you say makes sense; I’ll learn it!*
Thank you! What you say makes a lot of sense; I’ll learn it!*
Thank you! You’ve covered everything very thoroughly; I’ll learn from it!