VANE INSERTABLE TIE RODS WITH KEYED CONNECTIONS
First Claim
1. A method of assembling a mid-turbine frame for use in a gas turbine engine axially aft of a high-pressure turbine and fore of a low-pressure turbine, the method comprising:
- inserting at least a first tie rod through at least a first airfoil;
positioning first and second frame cases on opposite sides of the airfoil such that one of the first and second frame cases is radially outward of the airfoil and the other of the first and second frame cases is radially inward of the airfoil; and
attaching a first end of the tie rod to the first frame case at a keyed connection.
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Accused Products
Abstract
A gas turbine engine includes a combustor, a first turbine section in fluid communication with the combustor, a second turbine section in fluid communication with the first turbine section, and a mid-turbine frame located axially between the first turbine section and the second turbine section. The mid-turbine frame includes a first frame case, a second frame case, a vane positioned between the first frame case and the second frame case, and a spoke extending through the vane and connecting the first frame case to the second frame case. The spoke includes a tie rod having a first end connected to the first frame case at a keyed connection.
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Citations
20 Claims
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1. A method of assembling a mid-turbine frame for use in a gas turbine engine axially aft of a high-pressure turbine and fore of a low-pressure turbine, the method comprising:
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inserting at least a first tie rod through at least a first airfoil; positioning first and second frame cases on opposite sides of the airfoil such that one of the first and second frame cases is radially outward of the airfoil and the other of the first and second frame cases is radially inward of the airfoil; and attaching a first end of the tie rod to the first frame case at a keyed connection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A gas turbine engine comprising:
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a combustor; a first turbine section in fluid communication with the combustor; a second turbine section in fluid communication with the first turbine section; and a mid-turbine frame located axially between the first turbine section and the second turbine section, the mid-turbine frame comprising; a first frame case; a second frame case; a vane positioned between the first frame case and the second frame case; and a spoke extending through the vane and connecting the first frame case to the second frame case, wherein the spoke comprises; a tie rod having a first end connected to the first frame case at a keyed connection. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification