RESILIENT DAMPING SUPPORT OF TURBOMACHINE ROTOR WITH DAMPER WITH THROTTLE GROOVES Russian patent published in 2016 - IPC F01D25/00 F02C7/06 

FIELD: machine building.

SUBSTANCE: resilient damping support of turbomachine rotor with damper with throttle grooves containing housing, sleeve fixed in housing, elastic ring with uniformly alternating external and internal ledges made on outer and inner surfaces of ring, rolling bearing, spray-type ring with nozzles and seal oil cavity support. Bush secured in housing is made integral with elastic ring with uniformly alternating external and internal projections so that its middle part is made in form of elastic ring and end cylindrical part of bushing with flange for attachment to housing and other end part of sleeve with internal collar are rigidly connected with elastic ring on length of each external projection, and on length of each inner ledge and adjoining two spans elastic ring is separated from these bushing parts through slots. Between slots and ends of internal lugs are cylindrical belts in contact with rubber o-rings. In body there is sealed chamber in upper external projection, in which oil is forced to communicate with circular groove with rectangular cross section, made on external surface of elastic ring in middle of its width with eccentricity relative to support directed vertically downwards. On external surface of each internal lug in circumferential direction in middle of ledge is throttling groove with rectangular cross section connecting cavities adjacent to ledge, cavities, formed by external lugs of resilient rings are interconnected with cavities formed by its inner projections through radial holes. Ends of recesses formed by inner projections are sealed by rubber o-rings arranged in annular grooves made in external ring of bearing. Preload in them is selected from condition of absence of slippage working modes of turbomachine. At end of external ring of bearing has ledge, which enters counter slot in collar bushing with gap along slot perimeter equal to permissible displacement of rotor support, wherein slot in collar is arranged in middle radial plane of external projection of elastic ring. Oil in Groove in nozzle ring connecting its nozzle is supplied under pressure supply of its tight cavity in body located above one of external projections of elastic ring, through groove made in housing, and several holes made in sleeve. Air-tightness of cavities made in body, providing interference between said sleeve and housing.

EFFECT: achieving smaller radial size, higher elastic and damping characteristics, reduced rate of wear.

2 cl, 8 dwg