FIELD: machine building.
SUBSTANCE: wheel of turbine machine stage contains means of between blade sealing, including inserts installed in longitudinal cavities of side edges of the blade platforms and resting under work mode against side edges of the adjacent blade platforms. Each insert has elongated cylindrical shape and contains on it external cylindrical surface a ring groove for passage of air cooling the blade platforms, and ring groove creating wear indicator. Depth of the ring groove is below depth of the ring groove for the cooling air passage.
EFFECT: invention ensures possibility of cooling air passage through inserts and estimation of their wear.
9 cl, 5 dwg
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