Abstract: The coupling apparatus includes a gear shaft, including a sun gear at one shaft end for connecting to a reduction gear box. The sun gear drives a planetary gear train inside the gearbox. The coupling apparatus has outer splines on the gear shaft other end that mesh with inner splines of a ring gear connected to a coupling flange member by bolts and nuts. The flange member transmits high torque from a high speed turbine shaft to the gear shaft through the intermeshed splines. The teeth of the inner and outer splines are kept lubricated from a stationary spray source on the turbine side via an oil catcher mounted on the flange member opposed to the ring gear. The flow of lubricating oil during operation is from the oil catcher, through holes in the flange member, and to the intermeshed splines. Both oil catcher and ring gear are centered by a rim positioned on the flange member.

Abstract: An adjustable bleed apparatus and method for bleeding air to or from the impeller inlet region of a centrifugal compressor through a segmented annular bleed slot. An annular support member, connected to the fixed intake casing, supports a downstream annular shroud segment and an upstream annular shroud segment such that the downstream end of the downstream shroud segment is unconstrained. The spaced-apart distance between the shroud segments defines an annular bleed slot, which is segmented by bridge members. The connections between the shroud segments and the annular support member are configured such that the spaced apart distance of the annular bleed slot is adjustable. The connections between the annular support member and the fixed intake casing are configured such that the running clearance between the downstream shroud segment and the impeller is adjustable independently from the width of bleed slot.

Abstract: The coupling apparatus includes a gear shaft, including a sun gear at one shaft end for connecting to a reduction gear box. The sun gear drives a planetary gear train inside the gearbox. The coupling apparatus has outer splines on the gear shaft other end that mesh with inner splines of a ring gear connected to a coupling flange member by bolts and nuts. The flange member transmits high torque from a high speed turbine shaft to the gear shaft through the intermeshed splines. The teeth of the inner and outer splines are kept lubricated from a stationary spray source on the turbine side via an oil catcher mounted on the flange member opposed to the ring gear. The flow of lubricating oil during operation is from the oil catcher, through holes in the flange member, and to the intermeshed splines. Both oil catcher and ring gear are centered by a rim positioned on the flange member.

Abstract: An adjustable bleed apparatus and method for bleeding air to or from the impeller inlet region of a centrifugal compressor through a segmented annular bleed slot. An annular support member, connected to the fixed intake casing, supports a downstream annular shroud segment and an upstream annular shroud segment such that the downstream end of the downstream shroud segment is unconstrained. The spaced-apart distance between the shroud segments defines an annular bleed slot, which is segmented by bridge members. The connections between the shroud segments and the annular support member are configured such that the spaced apart distance of the annular bleed slot is adjustable. The connections between the annular support member and the fixed intake casing are configured such that the running clearance between the downstream shroud segment and the impeller is adjustable independently from the width of bleed slot.