Patent ID: 11885338
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 11:
12. An impeller housing for an impeller of a centrifugal compressor of a gas turbine engine, comprising:
a shroud annularly extending around a central axis, the shroud having a gaspath side facing the central axis and an opposed rear side, the shroud having a first end proximate an inlet of the impeller and a second end proximate an outlet of the compressor;
a structural member supporting the shroud, the structural member having an outer end securable to a casing of the gas turbine engine, an inner end of the structural member intersecting the rear side of the shroud at a location between the first end and the second end, a portion of the shroud extending radially outwardly from the location, the portion being cantilevered from the structural member; and
a reinforced region at the location where the structural member and the rear side of the shroud intersect, the portion of the shroud supported solely at the reinforced region, a thickness of the reinforced region in a direction normal to the gaspath side greater than a nominal thickness of the shroud outside the reinforced region, the reinforced region extending from a first location on the structural member to a second location on the rear side of the shroud, the second location between the structural member and the second end, the thickness of the reinforced region increasing from the nominal thickness at the second location towards the structural member,
a ratio of a radial distance (D3) relative to the central axis from the second end to the second location to a radial height (H1) of a portion of the shroud that extends radially outwardly beyond the inner end of the structural member being at most 0.8.