Retention and control system for turbine shroud ring

A retention and control system comprising:

• a rotor configured to rotate about an axis and having a series of blades each of which projects radially outward from the axis to a blade tip;
• a shroud ring, comprising a non-metallic material, the shroud ring having a peripheral groove and surrounding the series of blades with a clearance defined between the blade tips and the shroud ring;
• a support ring comprising a metallic material, engaging the shroud ring in the peripheral groove, and configured to axially locate the shroud ring, the support ring defining a troughed section disposed in the peripheral groove and including a series of tabs projecting radially outward from the troughed section, each tab having an aperture;
• a retention spring engaging the support ring radially outward from the shroud ring, the retention spring configured to apply a radially inwardly directed force on the support ring in the troughed section;
• an alignment ring with a series of alignment blocks each defining an opening, one alignment block aligned with each tab;
• and
• an alignment pin extending into each of the aligned apertures and openings, and configured to locate the support ring and the engaged shroud ring concentrically with the rotor about the axis, and configured to retain and control positioning of the shroud ring to maintain the clearance.

A retention and control system comprising:

• a rotor configured to rotate about an axis;
• a shroud ring, comprising a non-metallic material with high temperature stability, the shroud ring having a peripheral groove and surrounding the rotor with a clearance defined between the rotor and the shroud ring;
• a support ring engaging the shroud ring in the peripheral groove and configured to axially locate the shroud ring, and the support ring including a series of tabs projecting radially outward, each tab having an aperture;
• a retention spring engaging the support ring radially outward from the shroud ring, the retention spring including a series of openings, one of which registers with each of the apertures;
• and
• an alignment pin extending through each of the registered openings and apertures and configured to locate the support ring and the engaged shroud ring concentrically with the turbine about the axis, the support ring, the retention spring, and the alignment pins together configured to retain and control positioning of the shroud ring to maintain the clearance.