SUPPORTING-THRUST SLIDER BEARING FOR SHAFT OF TURBOMACHINE Russian patent published in 2006 - IPC F16C17/10 

FIELD: production of supporting-thrust slider bearings preferably used for rotors of steam turbines and turbo-generators of average and high power.

SUBSTANCE: supporting-thrust slider bearing has casing consisting of upper and lower half circles, upper and lower supporting half inserts with supporting spherical surfaces, said half inserts being mutually engaged with inner bore of half rings of bearing casing, working and mounting shoes, inner annular channel provided in upper and lower half inserts, lubricant feeding and discharge grooves for working and mounting shoes, and oil seal unit. Upper and lower supporting half inserts with supporting spherical surfaces are positioned in spaced relation therebetween. In lower half ring of bearing casing there is channel for feeding lubricant under high pressure from independent outer source through feeding unit comprising back valve, as well as from internal source through two inner cross channels connected to pockets provided on spherical supporting surface of lower half ring of bearing casing. Basic feeding of lubricant onto supporting surface of lower supporting half ring is provided through channels arranged at an angle to horizontal plane of detachment of supporting half inserts and connected to inner annular channel, and feeding of lubricant to working and mounting shoes from inner annular channel is provided through upper as well as lower supporting half inserts via radial-axial channel system. Cooling of working and mounting shoes and discharge of used lubricants from spaces between disks of rotor and from spaces between shoes of supporting-thrust bearing are performed using system of radial and tangential channels provided in lower and upper supporting half inserts. Discharge of used lubricant from supporting members of supporting half inserts is provided through radial-end bevels formed at two sides of supporting surface of supporting half inserts, as well as radial channels formed on supporting spherical surface of supporting lower half insert, near region wherein lubricant is discharged from bearing layer of hydrodynamic wedge.

EFFECT: optimal conditions for self-adjustment of supporting-thrust bearing, optimized thermal mode, enhanced reliability of vibration conditions and increased bearing capacity of supporting-thrust bearing with all operating modes.

4 cl, 4 dwg