BOW SPRING Russian patent published in 2009 - IPC F16F1/18 F16F3/00 F16C17/12 F16C27/02 

FIELD: mechanical engineering.

SUBSTANCE: invention refers to resilient elements of blade gasodynamic bearings used in small-sized high-speed turbomachines. The spring cut out from one plate contains multiple elementary arc-shaped springs (2) and (3). Springs (2) and (3) are located alternatively. Short springs (2) have equal length between reference edges. Long springs (3) also have equal length. The elementary springs (2) and (3) are interconnected by narrow bonding strips (8). Variable dependence of bow spring total tension on load is achieved due to difference in lengths for springs (2) and (3). Variable tension of bow spring in direction of elementary springs location is achieved due to variable width for springs (2) and/or variable width for springs (3).

EFFECT: reduction of shaft and bearing friction surfaces deterioration at start and stop of turbine rotor, reduction of rotor radial shift in bearing under action of heavy load and providing high limit carrying capacity of bearing at high rotor speed, providing assignment of various maximum inflection values to elementary springs and providing ease of bow spring manufacturing.

7 cl, 12 dwg