Patent ID: 6651986
Filing Date: 2003-11-25
Classification: F16J

Abstract:
Apparatus for preventing circumferential displacement of a lower half packing ring side segment mounted to a stationary component of a rotary machine having a component rotatable about a rotary axis, the stationary component having an annular groove about the axis, at least one axially directed locating flange about the axis and in part defining a slot opening into the annular groove, the stationary component being defined by upper and lower half housing parts secured to define a horizontal midline joint, said apparatus comprising:a lower side segment body for forming a lower side segment one of a plurality of annular segments about the axis of the machine and for partial disposition in the annular groove of the stationary component; said lower side segment body having upper and lower circumferential ends, an arcuate seal face, at least one axially directed flange for disposition in the annular groove, a neck portion receivable in the slot and interconnecting said flange and said seal face, and a length so as to extend circumferentially beyond, so that said upper circumferential end is disposed vertically above, said horizontal midline joint of said stationary component; and a key bar member secured to said stationary component and projecting into said annular groove for engagement with a key bar receptacle defined in a radially outer surface of said lower side segment body, adjacent said upper circumferential end, for preventing downward circumferential displacement of the lower side segment body in the annular groove.