Patent RU-2572444-C1 (RU)
Inventor: EHSKIN IZOL D DAVIDOVICH
IPC: F16F9/14
Filed: 2014-10-14
Granted: 2016-01-10
Abstract: FIELD: machine building. 
     SUBSTANCE: elastic deformation support of rotor of turbine machine with damper with throttle grooves relates to gas turbine engine for aircraft and ground use, namely to the design of the elastic deformation support of the compressor of the turbine machine for ground use or of aircraft gas turbine engine. The support contains a casing (1), a bushing (2) secured in the casing, a resilient ring (3) with uniformly alternating external (4) and internal (5) shoulders, a rolling bearing (6), a seal of support oil cavity made as radial-end seal comprising a lid (7), secured on the casing (1), a bushing (8), secured on the rotor (9) and rotating together with it, a graphite slotted O-ring (10) pressed by the compressed air to the lid and the bushing (8), a labyrinth ring (12), secured on the rotor (9) and rotating together with it, and creating with the lid (7) a secondary labyrinth seal. The shoulders (4) rest on middle parts of spans between the shoulders (16) of the resilient ring (15), and shoulders (5) - on external ring (23), with total tension over its external and internal shoulders equal to 0÷h/2mm, where h is height of shoulders of the resilient rings equal to h = 0.15÷0.3 mm. Ends of the ring clearance, in which the ring (3) is installed, are sealed by the metal O-rings (24, 25), pressed by the counter polished ends to ends of the external ring (23) of the bearing (6) by rubber O-rings (26) located in ring grooves of the injector ring (13), and in collar (20) of the bushing (2). On the ring (24) a shoulder (27) is made, it enters respectively in the counter slot (29), and the counter slot (30) in the collar 20 of the bushing (2) with clearance along the slot perimeter lesser than displacement of the ring (24), at which the mutual slippage of the metal and rubber O-rings occur, for example, with clearance 0÷0.05 mm. On the external ring (23) a shoulder (31) is made, it enters the counter blind slot (32) in the ring (25) with clearance along the slot perimeter (32) equal or slightly larger the permitted rotor displacement in the support, for example, with clearance 0.15÷0.3 mm. The radial clearance between the rings (24, 25) and bushing (2) if lesser than displacements of the ring (24, 25), when the mutual slippages of the metal and rubber O-rings occurs, for example, below 0.1 mm. On the end face of the ring (25) a shoulder (33) is made, it enters the counter slot (34) in the resilient ring (3) with clearance along the slot perimeter, also equal or slightly larger the permitted rotor displacement in the support, for example, with clearance 0.15÷0.3 mm. On the external surface of each shoulder (4, 5), in circumferential direction, in middle of the shoulder width the throttle grooves (37) are made, they connect depressions adjacent to the shoulder, and the grooves depth can be equal or larger the height of shoulders, for example, equal to 0.15÷0.3 mm, and width, for example, can be equal to 3÷5 mm. The depressions (38) located between the shoulders (4) connect to the depressions (40) located between the shoulders (5) after radial uniformly located along the circle holes (41), made in the ring (3) in middle of its width, in middle of spans between the shoulders (4) and (5). The oil channels in the support are separated to oil supplying to damper, and to bearing (6) lubricating, the damper channel connects with oil cavity only through the throttle element with high hydraulic resistance - clearances (31) along side surface of the shoulder (31) at end of the ring (23), through them oil from the damper is drained to the oil cavity of the support. 
     EFFECT: creation of the rotor support of the turbine machine with good elastic and strength characteristics, but with lower than prototype have radial and axial dimensions, and higher than prototype has damping characteristics, with reliable locking against resilient element rotation, and with high wear-resistance of its shoulders. 
     2 cl, 10 dwg