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US 10,330,017 B2Granted
Three spool geared turbofan with low pressure compressor drive gear system
AssigneeUnited Technologies Corporation
InventorsJohn R. Otto, James B. Coffin, Jason Husband
Life of this patent
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Abstract
A turbofan engine includes a fan rotatable about an axis and a compressor section including a high pressure compressor and a low pressure compressor. A turbine section includes a high pressure turbine, an intermediate turbine and a fan drive turbine. The high pressure turbine is coupled to drive the high pressure compressor. A fan drive gear system is driven by the fan drive turbine for driving the fan and a compressor drive gear system is driven by the intermediate turbine for driving the low pressure compressor.
Claims16
A turbofan engine comprising:
- a fan rotatable about an axis;
- a compressor section including a high pressure compressor and a low pressure compressor;
- a turbine section including a high pressure turbine, an intermediate turbine and a fan drive turbine;
- wherein the high pressure turbine is coupled to drive the high pressure compressor, wherein the low pressure compressor is driven by only the intermediate turbine;
- a fan drive gear system driven by only the fan drive turbine for driving the fan;
- and
- a compressor drive gear system driven by only the intermediate turbine for driving the low pressure compressor.
4 more elements
A turbofan engine comprising:
- a fan rotatable about an axis and driven by only a fan drive turbine through a first speed reduction device, wherein the fan rotates at a speed slower than the fan drive turbine;
- a compressor section including a high pressure compressor and a low pressure compressor;
- and
- a turbine section including a high pressure turbine and an intermediate pressure turbine, wherein the high pressure turbine is coupled to the high pressure compressor to rotate at common speed and only the intermediate turbine drives the low pressure compressor through a second speed reduction device at a speed slower than the intermediate pressure turbine.
1 more element
Dependencies are inferred from the claim text.