STATOR SHROUD RING ELEMENT OF MULTI-STAGE GAS TURBINE, STATOR SHROUD RING SEGMENT AND METHOD OF UNCOUPLING AND WITHDRAWAL OF FIRST SHROUD RING ELEMENT Russian patent published in 2008 - IPC F01D25/24 F01D11/08 

FIELD: engines and pumps.

SUBSTANCE: stator shroud ring element of the multi-stage gas turbine incorporates the surface intended for designating the hot gas segment and the front edge directed against the flow and the rear edge directed along the flow. The shroud ring segment includes the outer shroud ring segment and, at least, one inner shroud ring element. The outer shroud ring element edges are furnished with grooves axially open in the same direction. The inner shroud ring element has extending front and rear edge parts to get coupled with the outer shroud ring element grooves. The stator shroud ring element has a pin passing through the channel made in the outer shroud ring element into the slot arranged in the inner shroud ring element to fasten it on the outer shroud ring. Another invention of the set relates to the aforesaid stator shroud ring segment. The method of uncoupling and withdrawing the first inner shroud ring element includes withdrawing the moving the mating member arranged upstream of the first inner shroud ring element. Then, the pin inhibiting the turn of the first inner shroud ring relative to the fist outer shroud ring element is removed. Now, the pins of the inner shroud ring elements are removed for the said elements to release their fabric packing. Then, the first inner shroud ring element is shifted along the axis to detach the front and rear edge hook-like elements and, there after, it is shifted radially.

EFFECT: simplified servicing of shroud ring elements.

9 cl, 5 dwg