| 摘要 |
FIELD: gas-turbine plants for driving external loads, such as generators of mobile and modular low-power plants. SUBSTANCE: gas-turbine plant has external-load set 11 and gas-turbine engine whose housing 1 accommodates turbocompressor, free power turbine 7, diffuser 10 mounted downstream of turbine; in addition, it is provided with casing 12 which forms, together with engine housing 1, annular chamber 14, blind on shaft end, and communicates with diffuser 10; in vicinity of compressor 3, it communicates with atmosphere via ports 15; annular chamber 14 is isolated from air duct of compressor by means of adjustable pipe connections 17; rigidly fixed on inner surface 19 of casing 12 in vicinity of turbine 4 is annular throttling member 20 forming blind space 21 on side of compressor 3 and annular flow channel 23, on side of housing of turbine 22. External-load set housing, primarily gear or step-up gear housing, has its wall facing compressor and forms annular flow channel together with external-load drive shaft. EFFECT: improved operating conditions of plant due to more effective cooling of hot parts of engine housing, eliminating explosions and fire during engine starting and ice on external load housing at sub-zero temperatures. 4 dwg |
