Positioning structure for compressor blade

Abstract

The invention discloses a positioning structure for a compressor blade. The positioning structure comprises a blade body, a lock key and an impeller, the blade root of the blade body is arranged in animpeller groove of the impeller, and axial positioning locking is realized between the blade body and the impeller through the lock key; the blade top of the blade body is provided with a blade top process lug, and the blade top process lug is provided with at least one positioning hole A; the lock key is provided with a pair of an air inlet edge and an air outlet edge which are formed by bending, the lock key is arranged on the impeller rim of the impeller in a crossing mode, and the air inlet edge and the air outlet edge of the lock key are matched with the air inlet side and the air outletside of the impeller correspondingly so that the lock key can be clamped on the impeller rim of the impeller; and a positioning hole B is formed in the middle of the lock key, and a boss matched withthe positioning hole B is arranged on the blade root bottom surface of the blade body. The positioning structure has the beneficial effects that the structure is simple, machining is easy, and assembling is convenient; and moreover, the requirement for the forging level of the blade is relatively low, and the machining cost of the compressor blade is reduced.

Description

technical field [0001] The invention relates to the technical field of compressor blade assembly structures, in particular to a positioning structure of compressor blades. Background technique [0002] The finished blade body of the conventional compressor blade is relatively thin, with only the blade root and no blade crown. The common detection and machining positioning method of this kind of blade forging is: adding a hard reference positioning boss on the blade and blade body, and restricting the movement of the blade by restricting the boss (or the blade root plane of the blade itself), so as to achieve the detection and positioning of the forging. Purpose of processing. [0003] Moreover, the compressor blade is installed in the wheel groove of the impeller through its blade root. Since the blade root of the blade is fir tree-shaped, dovetail-shaped, etc., the impeller wheel groove is an axial through groove that matches it. The axial position of all blades on the im...

AI Technical Summary

Problems solved by technology

For this positioning method, positioning grooves and screw holes may weaken the strength of the wheel flange and blade root platform, affecting the safety of the rotor

[0004] At present, there is still a certain gap between the domestic blade forging level and the international level, and the same is true for the compressor blade forgings, and the hard reference positioning method through the blade body boss positioning has higher requirements on the forging level of the forgings, which requires the thickness consistency and contour of the forgings The degree of forging is very good. At the current level of forging, the cost to achieve such a state of forging will also increase

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