초록 ▼

To minimize leakage of high pressure compressor air from the high pressure side of an aixal flow compressor rotor back to the low pressure side by the outside of a ring of shroud segments, the shroud segments, or at least their front and rear edge portions, are made relatively thin and springy and a

To minimize leakage of high pressure compressor air from the high pressure side of an aixal flow compressor rotor back to the low pressure side by the outside of a ring of shroud segments, the shroud segments, or at least their front and rear edge portions, are made relatively thin and springy and are retained to a carrier ring so that those edge portions are held sprung against circumferentially extending sealing lands on the supporting structure. It is arranged that the bending in the shroud segments is effective to accommodate predetermined manufacturing tolerances in the shroud segments and the supporting structure, thus avoiding unwanted clearances at the sealing lands. Alternatively, or in addition, the bending can accommodate reductions in bending due to differential expansion between the components during operation of the compressor rotor at elevated temperatures.

대표청구항 ▼

For an axial flow compressor rotor, a shroud assembly comprising: a shroud ring comprising a plurality of shroud segments of unitary structure, said shroud segments being resiliently deformable, each of said shroud segments having front, intermediate and rear edge portions extending circumferentiall

For an axial flow compressor rotor, a shroud assembly comprising: a shroud ring comprising a plurality of shroud segments of unitary structure, said shroud segments being resiliently deformable, each of said shroud segments having front, intermediate and rear edge portions extending circumferentially of said shroud ring, said front and rear edge portions forming radially inner portions relative to said intermediate portion of said shroud segments; supporting structure circumferentially surrounding said shroud ring, said supporting structure having portions thereof in circumferential and axial sealing contact with said front and rear edge portions of said shroud segments thereby to form a circumferentially and axially extending seal therebetween; and means retaining said shroud segments to said supporting structure with said front and rear edge portions forming said radially inner portions of said shroud segments being sprung radially outwardly against and into the circumferential and axial sealing contact with said supporting structure, whereby said shroud segments are held in said shroud assembly in a resiliently deformed condition.