TURBO COMPRESSOR IMPELLER EROSION INDICATOR Russian patent published in 2014 - IPC F04D29/28 F01D5/28 G01M15/14 

FIELD: engines and pumps.

SUBSTANCE: method of turbo machine compression stage turbo compressor impeller erosion detection. Turbo compressor impeller (10) comprises hub (12), body (14) extending radially from said hub and multiple vanes (16) fitted on said impeller. Said body comprises erosion indicator (18). Erosion indicator (18) comprises at least one rib (20) extending radially from the body peripheral edge (22) to trailing edge (16b) of one of the vanes (16). Note here that said rib (20) features axial depth smaller than that of the body (14) to make the ledge between rib flat surface and body surface wherefrom extends the vane. Endoscope (40) is fitted inside compression stage (13) to check up the impeller erosion indicator (18) wear. There is no necessity if dismantling of said impeller for erosion check since technician can check up impeller wear by directing the camera to wear indicator. Then, on turning the impeller, technician can easily check up the erosion created by impeller butt valleys.

EFFECT: ease of detection.

7 cl, 7 dwg