| 摘要 |
FIELD: mechanical engineering; turbine engines. SUBSTANCE: proposed turbine engine has housing, compressor section installed in housing and provided with centrifugal impeller with upper edge and diffuser located around edge of impeller and used as air outlet under pressure, and also turbine section and shaft. Shaft is installed for rotation around central longitudinal axis and it connects impeller with turbine section. Central support attached to housing and supporting the shaft is installed behind impeller in direction of main gas flow. Rear space with wall of space enclosing rear space between impeller and central support is arranged between impeller and section of turbine. Turbine engine is furnished also with first air flow outlet from upper part of impeller directing air into rear space, second air flow outlet into heat exchanger cooling second flow of air, and device to deliver cooled air from heat exchanger into rear space with mixing of cooled air first flow of air reduce air temperature in rear space. EFFECT: increased service life of impeller bushing, reduced weight and cost of bearing unit, and expenses for cooling. 4 cl, 2 dwg |
