초록 ▼

An improved rotary engine, engine lining and engine casing and lining combination are disclosed. The engine is preferable a turbofan engine and includes a fan blade, rotatably mounted within a generally cylindrical casing for rotation about a lengthwise extending central axis. An annular lining is m

An improved rotary engine, engine lining and engine casing and lining combination are disclosed. The engine is preferable a turbofan engine and includes a fan blade, rotatably mounted within a generally cylindrical casing for rotation about a lengthwise extending central axis. An annular lining is mounted within the casing between a tip of the fan blade and the casing. The lining seals the tip of the fan blade within the casing. The lining includes a brush seal that extends around an inner circumference of the casing, and has a plurality of bristles that extend radially inward from the seal. A retaining membrane extends around the brush seal, preventing the bristles from extending substantially in a radial direction from the brush seal. The retaining membrane is adapted to release the bristles to extend radially inward to occupy a region between the tip of the fan blade and the casing upon a radial excursion of the fan blade. The bristles, once released, at least partially seal the tip of the fan blade and the casing reducing air recirculation at the blade tip.

대표청구항 ▼

[ What is claimed is:] [1.]1. A rotary engine comprising:a generally cylindrical casing;a fan blade, rotatably mounted within said casing for rotation about a lengthwise extending central axis of said engine;an annular lining mounted within said casing between a tip of said fan blade and said casing

[ What is claimed is:] [1.]1. A rotary engine comprising:a generally cylindrical casing;a fan blade, rotatably mounted within said casing for rotation about a lengthwise extending central axis of said engine;an annular lining mounted within said casing between a tip of said fan blade and said casing, sealing said tip of said fan blade within said casing, said lining comprising:a brush seal, extending around an inner circumference of said casing, comprising a plurality of bristles extending radially inward from said brush seal;a retaining membrane extending around said brush seal, preventing said bristles from extending substantially in a radial direction from said brush seal;whereby said retaining membrane is adapted to release said bristles to extend radially inward and occupy a region between said tip of said fan blade and said casing to at least partially seal said tip of said fan blade within said casing upon a radial excursion of said fan blade.