Ceramic radial turbine rotor

Details Ceramic radial turbine rotor Ceramic radial turbine rotor

1987-09-24

1989-07-25

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Coating, specific composition or characteristic

415200, 4152171, F01D 528

Patent

active

048508039

ABSTRACT:
A ceramic radial turbine rotor made of a ceramic material having a strength s (kg/mm.sup.2) includes blade tips having a thickness t (mm). A product st.sup.2 of strength s and t.sup.2 (square of t) is representative of resistance to breakage of the rotor to foreign objects colliding against blades of the rotor. The product st.sup.2 fulfills a relation st.sup.2 .gtoreq.5.times.10.sup.4 vm+33. In this case, v is a circumferential speed of tip ends of inducers of blades of the rotating rotor when the blades are damaged by steel balls having a mass m (kg) colliding against the blades in a steel ball collision test of blades of a ceramic radial turbine rotor, and vm is a product of v and m.

REFERENCES:
patent: 4385866 (1983-05-01), Ochiai et al.
patent: 4692099 (1987-09-01), Homma et al.
patent: 4701106 (1987-10-01), Sasaki

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