Turbine geometry to reduce damage from hard particles

Rotary kinetic fluid motors or pumps – With separating means or guard for solid matter in working...

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Details

4151737, 277 53, F03B 1108

Patent

active

052717127

ABSTRACT:
In a turbine potentially threatened by particulate material and having upstream and downstream stages enclosed within a housing, each stage employing stationary and rotating components, the stationary components including at least one spillstrip holder, at least one spillstrip and at least one tip seal on the spillstrip, the at least one tip seal depending from the spillstrip adjacent the rotating component, the improvement which comprises, a slanted outer side wall on the at least one spillstrip holder, a small scoop on the spillstrip adjacent the tip seal and a small through opening in the tip seal so that the particulate material is discharged relatively quickly from the space adjacent the tip seal either to a special chamber in the stationary component for capturing and storing the particulate material for protecting downstream stages therefrom, or to rejoin the normal steam flow entering the following stage.

REFERENCES:
patent: 3597102 (1971-08-01), Unsworth et al.
patent: 3944380 (1976-03-01), Kampe
patent: 4402515 (1983-09-01), Malott
patent: 4696480 (1987-09-01), Jornhagen
patent: 4721313 (1988-01-01), Pennink
patent: 5049032 (1991-09-01), Brandon

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