| 摘要 |
An abradable and anti-encrustation coating is described for a rotating fluid machine of the type comprising a casing (12), in which a shaft (14) equipped with at least one rotor (16) having a series of circumferential vanes (18) is rotatingly assembled and at least one diffuser (20) integral with the casing (12). The outer edge of each circumferential vane (18) faces an annular surface portion (28) of the diffuser (20). The annular surface portion (28) of the diffuser (20) is at least partially covered with a coating which can be abraded by the outer edge of each circumferential vane (18), said abradable coating consisting of a first lower metal-based coating layer, applied on the annular surface portion (28) of the diffuser (20), and a second upper polymer-based coating layer, applied on the first lower metal-based coating layer. |
