Device for stopping in rotation a fixed blade bearing sector in a gas turbine casing
View Patent ↗A device for stopping rotation of a fixed blade bearing sector in a gas turbine casing. Sectors of synchronizing ring blades are maintained against tangential rotational movements by sliding into grooves of a casing by pins passing through perforations in an extension of the two parts. The pins are prevented from accidental removal either by a flexible lock ring or by a locking tab maintained between the two parts when they have been completely assembled.
1. A device for stopping rotation of a blade sector of a guide vane in a casing of a gas turbine, comprising:
a pair of drillings formed in line in the blade sector and the casing respectively;
a pin that fits into the drillings; and
means for holding the pin in the drillings,
wherein the drillings are made through a rim of the blade sector and through a groove in the casing into which the rim is pushed in, and wherein the holding means comprises a lock ring inserted under the rim in the groove and occupying a recess intersecting the pin.
2. A device for stopping rotation of a blade sector of a guide vane in a casing of a gas turbine, comprising:
a pair of drillings formed in line in the blade sector and the casing respectively;
a pin that fits into the drillings; and
means for holding the pin in the drillings,
wherein the holding means comprises a locking tab projecting from the pin and that stops in contact with the blade sector on a first side, and the casing on a second side.
3. A device according to claim 2 , wherein the pin comprises a non-circular section configured to be adjusted in one of the drillings with a corresponding non-circular section.
4. A device for stopping rotation of a blade sector of a guide vane in a casing of a gas turbine, comprising:
a pair of drillings formed in line in the blade sector and the casing respectively;
a pin that fits into the drillings; and
a lock ring,
wherein the drillings are made through a rim of the blade sector and through a groove in the casing into which the rim is pushed in, and wherein the lock ring is inserted under the rim in the groove and engages a recess intersecting the pin.
5. A device according to claim 4 , wherein said lock ring is configured to hold in place said pin.
6. A device according to claim 4 , wherein said groove is between a hooked portion and a cylindrical portion of the casing.
7. A device according to claim 6 , wherein said drillings pass through said hooked portion.
8. A device according to claim 4 , wherein said pin is configured to stop rotation of the blade sector with respect to the casing.
9. A device according to claim 4 , wherein said pin has a tab projecting from the pin.
10. A device according to claim 9 , wherein said tab is configured to stop in contact with the blade sector on a first side.
11. A device according to claim 10 , wherein said tab is configured to stop in contact with the casing on a second side.
12. A device according to claim 9 , wherein the pin comprises a non-circular section configured to fit in one of the drillings having a corresponding non-circular section.
13. A device according to claim 4 , wherein the pin comprises a non-circular section configured to fit in one of the drillings having a corresponding non-circular section.