초록 ▼

A gas turbine engine cooling airflow pickup and delivery system which radially inwardly traverses the torque transmittal path of the compressor section at a relatively large radius location, then extends substantially farther inwardly to a significantly smaller radius location, all with minimal stat

A gas turbine engine cooling airflow pickup and delivery system which radially inwardly traverses the torque transmittal path of the compressor section at a relatively large radius location, then extends substantially farther inwardly to a significantly smaller radius location, all with minimal static pressure loss to the cooling airflow. Pressurized, substantially non-swirling air from the compressor stage is supplied to a collector, and from the collector thru pickup holes arranged at an angle of 45 degrees reversely to the direction of rotation of the shaft. The pressurized air is then lead into a vortex spoiler which has a plurality of blades smoothly curved reversely to the direction of rotation of the shaft, the radially outer end of each blade being inclined in matching relation to the pickup holes.

대표청구항 ▼

[ Having described the invention with sufficient clarity that those skilled in the art may make and use it, what is claimed is:] [1.] In a gas turbine engine having a compressor assembly that includes a plurality of rotary compressor stages interconnected in torque transmitting relationship by rotar

[ Having described the invention with sufficient clarity that those skilled in the art may make and use it, what is claimed is:] [1.] In a gas turbine engine having a compressor assembly that includes a plurality of rotary compressor stages interconnected in torque transmitting relationship by rotary shafting such that the torque transmittal path between the compressor stages is disposed substantially radially outward of the axis of rotation of the compressor stages, a cooling airflow pickup system comprising:a collector arranged to collect pressurized, substantially nonswirling, cooling airflow from said compressor assembly at a first location radially outward of said shafting;an annular rotary member in said shafting having a plurality of straight, radially inwardly extending pickup holes arranged to receive the nonswirling airflow from said collector means, said pickup holes being circumferentially spaced about said annular member and being inclined reversely to the direction of rotation of said shafting at a preselected angle to a direct radial direction, such that the cooling airflow may pass radially inwardly through said pickup holes with minimal static pressure loss; anda vortex spoiler interconnected to rotate with said shafting, said spoiler defining a path extending radially inwardly from said pickup holes to a second location substantially closer to the axis of rotation than said first location, said spoiler including a plurality of circumferentially spaced blades smoothly curved reversely to the direction of rotation of said shafting and axially spanning said path to divide it into a plurality of minimally converging passages, the radially outer end of each of said blades being inclined in matching relation to said preselected angle of the pickup holes, and the radially inner end of each of said blades being in a substantially directly radial direction, such that cooling airflow may pass radially inwardly through said passages to said second location with minimal swirl increase and minimal static pressure loss.