TURBOMACHINE COMPONENT WITH NON-AXISYMMETRIC SURFACE Russian patent published in 2018 - IPC F01D5/14 F04D29/32 F04D29/68 

FIELD: machine building.

SUBSTANCE: object of the invention is turbomachine part (1) comprising at least first and second blades (3, 3I, 3E), and platform (2) from which blades (3, 3I, 3E) extend, wherein platform (2) has non-axisymmetric surface (S) limited by first and second end planes (PS, PR), and defined by at least three construction curves (PC-A, PC-C, PC- F) of class C¹, each representing the value of a radius of said surface (S) on the basis of a position between the lower surface of first blade (3I) and the upper surface of second blade (3E) according to a plane substantially parallel to end planes (PS, PR), including first curve (PC-C), that increases in the vicinity of second blade (3E); second curve (PC-F) disposed between first curve (PC-C) and trailing edge (BF) of first and second blades (3, 3I, 3E), and that decreases in the vicinity of second blade (3E); third curve (PC-A) disposed between first curve (PC-C) and leading edge (BA) of first and second blades (3, 3I, 3E), and having a minimum at second blade (3I). Tests have shown that the gain ranges from 0.1 to 0.4 % of the total efficiency of the compressor.

EFFECT: reduced maximum stress.

14 cl, 8 dwg