Abstract:
A compressor (22) for a turbine engine (10) includes an inflatable bleed valve (57) that selectively bleeds core airflow from the compressor. The bleed valve has an inlet (58) leading from the compressor and a passageway (112) leading from the inlet. An inflatable valve (116) selectively obstructs the passageway based upon a controlled supply of high pressure air to the inflatable valve. The supply of high pressure air may be compressed core airflow from an area downstream of the inlet to the bleed valve .
Abstract:
A turbine engine provides a differential gear system coupling the turbine to the bypass fan and the compressor. In this manner, the power/speed split between the bypass fan and the compressor can be optimized under all conditions. In the example shown, the turbine drives a sun gear, which drives a planet carrier and a ring gear in a differential manner. One of the planet carrier and the ring gear is coupled to the bypass fan, while the other is coupled to the compressor.
Abstract:
A gas turbine engine has a fan, first and second compressor stages, first and second turbine stages. The first turbine stage drives the second compressor stage as a high spool. The second turbine stage drives the first compressor stage as part of a low spool. A gear train drives the fan with the low spool, such that the fan and first compressor stage rotate in the same direction. The high spool operates at higher pressures than the low spool. A lubrication system is also disclosed.
Abstract:
A turbine engine has a fan shaft. At least one tapered bearing is mounted on the fan shaft. The fan shaft includes at least one passage extending in a direction having at least a radial component, and adjacent the at least one tapered bearing. A fan is mounted for rotation on the tapered bearing. An epicyclic gear train is coupled to drive the fan. The epicyclic gear train includes a carrier supporting intermediate gears that mesh with a sun gear. A ring gear surrounds and meshes with the intermediate gears. Each of the intermediate gears are supported on a respective journal bearing. The epicyclic gear train defines a gear reduction ratio of greater than or equal to about 2.3. A turbine section is coupled to drive the fan through the epicyclic gear train. The turbine section has a fan drive turbine that includes a pressure ratio that is greater than about 5. The fan includes a pressure ratio that is less than about 1.45, and the fan has a bypass ratio of greater than about ten (10).
Abstract:
A turbine engine has a fan shaft. At least one tapered bearing is mounted on the fan shaft. The fan shaft includes at least one passage extending in a direction having at least a radial component, and adjacent the at least one tapered bearing. A fan is mounted for rotation on the tapered bearing. An epicyclic gear train is coupled to drive the fan. The epicyclic gear train includes a carrier supporting intermediate gears that mesh with a sun gear. A ring gear surrounds and meshes with the intermediate gears. Each of the intermediate gears are supported on a respective journal bearing. The epicyclic gear train defines a gear reduction ratio of greater than or equal to about 2.3. A turbine section is coupled to drive the fan through the epicyclic gear train. The turbine section has a fan drive turbine that includes a pressure ratio that is greater than about 5. The fan includes a pressure ratio that is less than about 1.45, and the fan has a bypass ratio of greater than about ten (10).
Abstract:
Un motor (10) de turbina que comprende: un árbol (20) de ventilador; un ventilador (18); y un tren (22) de engranajes epicicloidales acoplado para accionar el ventilador (18), incluyendo el tren (22) de engranajes epicicloidales un portador (26), que soportan engranajes (32) intermedios que engranan con un engranaje (30) solar, y un engranaje (38) de anillo que rodea y engrana con los engranajes (32) intermedios, caracterizado por que: cada uno de los engranajes (32) intermedios es soportado sobre un cojinete (34) de apoyo; el tren (22) de engranajes epicicloidales define una relación de reducción de engranaje de más de o igual a 2,5; el motor (10) comprende además al menos un cojinete (80) cónico montado sobre el árbol (20) de ventilador; el árbol (20) de ventilador incluye al menos un paso (82) que se extiende radialmente adyacente al menos a un cojinete (80) cónico; al menos un cojinete (80) cónico incluye un primer cojinete (80a) cónico y un segundo cojinete (80b), de rodillo cónico axialmente Espaciado, y al menos un paso (82) que se extiende radialmente incluye: un primer paso (82a) y un segundo paso (82b), estando ubicado el primer paso (82a) en un lado axialmente hacia adelante del primer cojinete (80a) cónico y estando ubicado el segundo paso (82b) en un lado axialmente hacia atrás del primer cojinete (80a) cónico; y un tercer paso y un cuarto paso, estando ubicado el tercer paso en un lado axialmente hacia delante del segundo cojinete (80b) cónico y estando ubicado el cuarto paso en un lado axialmente hacia atrás del segundo cojinete (80b) cónico; y el ventilador (18) tiene una relación de presión que es menor que 1,45 durante la operación y es montado para rotación sobre el cojinete (80) cónico.
Abstract:
A gas turbine engine has a fan, first and second compressor stages, first and second turbine stages. The first turbine stage drives the second compressor stage as a high spool. The second turbine stage drives the first compressor stage as part of a low spool. A gear train drives the fan with the low spool, such that the fan and first compressor stage rotate in the same direction. The high spool operates at higher pressures than the low spool. A lubrication system is also disclosed.