Tie rod-locking nut assembly and gas turbine including same
A tie rod-locking nut assembly includes a tie rod-locking nut threaded onto a jack bolt, a jack bolt-locking nut inserted between the tie rod-locking nut and the jack bolt, an anti-loosening washer formed to wrap around an outer circumferential surface of the jack bolt-locking nut to prevent loosening of the jack bolt-locking nut, and a locking plate formed to cover the anti-loosening washer and engaging with an outer circumferential surface of the tie rod.
1. A tie rod-locking nut assembly comprising:
a tie rod-locking nut threaded onto a jack bolt;
a jack bolt-locking nut inserted between the tie rod-locking nut and the jack bolt;
an anti-loosening washer formed to wrap around an outer circumferential surface of the jack bolt-locking nut to prevent loosening of the jack bolt-locking nut; and
a locking plate formed to cover the anti-loosening washer and engaging with an outer circumferential surface of a tie rod.
2. The tie rod-locking nut assembly of claim 1 , wherein the tie rod-locking nut has a jack bolt-insertion hole formed at a position corresponding to a position in which the jack bolt is formed, and the jack bolt-insertion hole has a stepped portion formed at an end of the jack bolt-insertion hole.
3. The tie rod-locking nut assembly of claim 2 , wherein the jack bolt-locking nut has a shape of hollow pipe with both ends open and is inserted into a gap formed between the stepped portion and the jack bolt during engagement with the jack bolt.
4. The tie rod-locking nut assembly of claim 3 , wherein the jack bolt-locking nut is formed with a length greater than the stepped portion such that, when inserted into the gap, a distal end thereof is exposed externally from the tie rod-locking nut,
wherein the jack bolt-locking nut is in a shape such that a cross-section of the jack bolt-locking nut has an outer circumference in a circular shape corresponding to the stepped portion and has an inner circumference in a polygonal shape corresponding to the jack bolt.
5. The tie rod-locking nut assembly of claim 1 , wherein a contact area between the jack bolt-locking nut and the anti-loosening washer is caulked.
6. The tie rod-locking nut assembly of claim 1 , where the jack bolt-locking nut is one of a plurality of jack bolt-locking nuts and wherein the anti-loosening washer is a circular plate member having a plurality of insertion holes formed in positions corresponding to the plurality of jack bolt-locking nuts.
7. The tie rod-locking nut assembly of claim 1 , wherein an inner circumferential surface of the locking plate is threaded to engage with the outer circumferential surface of the tie rod.
8. A tie rod and tie rod-locking nut assembly, the tie rod arranged to pass through a center of a plurality of compressor rotor disks and turbine rotor disks and having one end engaged with a most upstream-side one of the compressor rotor disks and the other end engaged with the tie rod-locking nut assembly, the tie rod-locking nut assembly comprising:
a tie rod-locking nut threaded onto a jack bolt;
a jack bolt-locking nut inserted between the tie rod-locking nut and the jack bolt;
an anti-loosening washer formed to wrap around an outer circumferential surface of the jack bolt-locking nut to prevent loosening of the jack bolt-locking nut; and
a locking plate formed to cover the anti-loosening washer and engaging with an outer circumferential surface of the tie rod.
9. The tie rod of claim 8 , wherein the tie rod-locking nut has a jack bolt-insertion hole formed at a position corresponding to a position in which the jack bolt is formed, and the jack bolt-insertion hole has a stepped portion formed at an end of the jack bolt-insertion hole.
10. The tie rod of claim 9 , wherein the jack bolt-locking nut has a shape of hollow pipe with both ends open and is inserted into a gap formed between the stepped portion formed and the jack bolt during engagement with the jack bolt.
11. The tie rod of claim 10 , wherein the jack bolt-locking nut is formed with a length greater than the stepped portion such that, when inserted into the gap, a distal end thereof is exposed externally from the tie rod-locking nut,
wherein the jack bolt-locking nut is in a shape such that a cross-section of the jack bolt-locking nut has an outer circumference in a circular shape corresponding to the stepped portion and has an inner circumference in a polygonal shape corresponding to the jack bolt.
12. The tie rod of claim 8 , wherein a contact area between the jack bolt-locking nut and the anti-loosening washer is caulked.
13. The tie rod of claim 8 , where the jack bold-locking nut is one of a plurality of jack bolt-locking nuts and wherein the anti-loosening washer is a circular plate member having a plurality of insertion holes formed in positions corresponding to the plurality of jack bolt-locking nuts.
14. The tie rod of claim 8 , wherein an inner circumferential surface of the locking plate is threaded to engage with the outer circumferential surface of the tie rod.
15. A gas turbine comprising:
a compressor suctioning and compressing external air and having a plurality of compressor rotor disks;
a combustor mixing fuel with compressed air and combusting an air-fuel mixture;
a turbine section having a plurality of turbine blades mounted on a plurality of turbine rotor disks so that the turbine blades is rotated by the combustion gases discharged from the combustor; and
a tie rod having one end engaged with a most upstream-side one of the compressor rotor disks and the other end engaged with a tie rod-locking nut assembly, the tie rod-locking nut assembly comprising:
a tie rod-locking nut threaded onto a jack bolt;
a jack bolt-locking nut inserted between the tie rod-locking nut and the jack bolt;
an anti-loosening washer formed to wrap around an outer circumferential surface of the jack bolt-locking nut to prevent loosening of the jack bolt-locking nut; and
a locking plate formed to cover the anti-loosening washer and engaging with an outer circumferential surface of the tie rod.
16. The gas turbine of claim 15 , wherein the tie rod-locking nut has a jack bolt-insertion hole formed at a position corresponding to a position in which the jack bolt is formed, and the jack bolt-insertion hole has a stepped portion formed at an end of the jack bolt-insertion hole.
17. The gas turbine of claim 16 , wherein the jack bolt-locking nut has a shape of hollow pipe with both ends open and is inserted into a gap formed between the stepped portion formed and the jack bolt during engagement with the jack bolt.
18. The gas turbine of claim 17 , wherein the jack bolt-locking nut is formed with a length greater than the stepped portion such that, when inserted into the gap, a distal end thereof is exposed externally from the tie rod-locking nut,
wherein the jack bolt-locking nut is in a shape such that a cross-section of the jack bolt-locking nut has an outer circumference in a circular shape corresponding to the stepped portion and has an inner circumference in a polygonal shape corresponding to the jack bolt.
19. The gas turbine of claim 15 , where the jack bolt-locking nut is one of a plurality of jack bolt-locking nuts and wherein the anti-loosening washer is a circular plate member having a plurality of insertion holes formed in positions corresponding to the plurality of jack bolt-locking nuts.
20. The gas turbine of claim 15 , wherein an inner circumferential surface of the locking plate is threaded to engage with the outer circumferential surface of the tie rod.