A mid-turbine frame buffer system for a gas turbine engine includes a mid-turbine frame that supports a shaft by a bearing. An air compartment and a bearing compartment are arranged radially inward of the mid-turbine frame. The bearing compartment is arranged within the air compartment and includes first and second contact seals arranged on either side of the bearing. The air compartment includes multiple air seals. A high pressure compressor is fluidly connected to the air compartment and is configured to provide high pressure air to the air compartment...
1. A mid-turbine frame buffer system for a gas turbine engine comprising: a mid-turbine frame supporting a shaft by a bearing;an air compartment and a bearing compartment arranged radially inward of the mid-turbine frame, the bearing compartment arranged within the air compartment, the bearing compartment including a seal assembly provided adjacent the bearing and separating the bearing compartment front the air compartment, the air compartment including two or more air seals;an air source fluidly connected to the air compartment and configured to provid...
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