| 摘要 |
FIELD: engines and pumps.SUBSTANCE: invention relates to engine building. GTE LPC rotor shaft front support comprises roller bearing, which separates support to stator and rotor parts. Stator part comprises support body, which is connected to roller bearing housing and is enveloped with VGV hub with formation of compact annular cavities. One cavity is equipped with resilient ring. Other annular cavity contains shaft oscillations resilient damping element with system of resilient beams. Support stator part includes annular forming elements of air supercharging, breathing and oil cavities. Support rotor part comprises front support trunnion, consisting of hollow cylindrical section with installed in it roller bearing inner ring and labyrinths two crested rings, separating oil and breathing cavities, as well as breathing cavity and supercharging air cavity, which volume of is limited by labyrinth third crested ring, installed on trunnion conical diaphragm. Resilient ring is equipped with single-sided projections mutually shifted along circumference from ring outer and inner sides in one with angular frequency of γ=(2.55÷3.82) [unit/rad]. Ring belt is provided with perforation in form of distributed holes. Trunnion is equipped with end bushing. End bushing has sealed diaphragm, dividing volume of bushing on oil and air cavities. In diaphragm last sleeve is made protruding in both sides.EFFECT: invention widens engine stable operation range of operating modes with rotor shaft vibrations damping without entering into resonance frequencies and increase of compressor and engine as a whole service life.21 cl, 5 dwg |
