DEVICE FOR AIR SUPPLY FOR TURBOREACTIVE ENGINE TURBINE COOLING (OPTIONS)

FIELD: motors and pumps.SUBSTANCE: invention relates to airflow control systems cooling a turbine of a predominantly two-circuit turbojet engine with an air-to-air heat exchanger in an outer circuit, and can be successfully used in turbo power engineering in gas turbine drives of gas compressor units of compressor stations and main gas pipelines. In a first embodiment, the devices of the overlapping pistons are pivotally mounted relative to the valve bodies, the means for moving the piston in each valve is made in the form of a rod rigidly connected to a closing piston and a lever, the lever is fixed at one end to the rod, and the other is connected to the means for simultaneously transferring the displacement action to the overlapping pistons, in the throttling sections, the ratio of the area of lateral surface (S) to the generatrix equal to the height of the holes in each overlapping piston, to aperture (F), is 2...20, and the ratio of the length of the lever from the axis of the rod to the ligature (L) with the means for simultaneously transferring the moving action to the outer radius (R) of the overlapping piston is 1...4. In another embodiment, the means for moving the piston in each valve is in the form of a rod, rigidly connected to the overlapping piston and lever, the lever is made in the form of a L-shaped bracket with cutouts under the axle at its ends, at least one bracket is mounted on the axis on the valve body with the possibility of longitudinal rotation, with one end of the bracket being notched with an axle mounted on the rod, and with the other end, a notch with an axis mounted on the means for simultaneously transferring the displacement action to the overlapping pistons, in the throttling sections, the ratio of the area of the lateral surface (S) with the generatrix equal to the height of the holes in each valve body, to the aperture area (F) is 2...20.EFFECT: use of a system for controlling the supply of cooling air on a turbojet engine reduces the need for cooling air consumption and reduces the specific fuel consumption.2 cl, 4 dwg Изобретение относится к системам управления расходом воздуха, охлаждающего турбину преимущественно двухконтурного турбореактивного двигателя с воздухо-воздушным теплообменником в наружном контуре, и может быть успешно использовано в турбоэнергомашиностроении в газотурбинных приводах газоперекачивающих агрегатов компрессорных станций и магистральных газопроводов. В первом варианте устройства перекрывающие