Arrangement for maintaining optimum minimum operating clearance

Details Arrangement for maintaining optimum minimum operating clearance Arrangement for maintaining optimum minimum operating clearance

1977-09-08

1979-04-03

Casaregola, Louis J.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Erodable or permanently deformable

415200, F01D 1108

Patent

active

041474660

ABSTRACT:
Between the rotor and stator components of turbo-machines, compressors, pressure wave machines and the like, the clearance space is partially filled out by an abradable element which is capable of "growing" when subjected to an elevated temperature and/or to the influence of the particular atmosphere in which the machine operates. As the element grows, it compensates for corrosion and erosion factors which take place in the machine and which otherwise tend to increase the clearance. Suitable materials which will "grow" under these operating conditions are gray cast iron and a sintered graphite-metal.

REFERENCES:
patent: 2930521 (1960-03-01), Koehning
patent: 3701536 (1972-10-01), Matthews et al.

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