Double-sided centrifugal impeller and machining method thereof

Abstract

The invention discloses a double-sided centrifugal impeller and a machining method thereof. The double-sided centrifugal impeller comprises an impeller disk, a left blade, a right blade and an axis hole penetrating through the rotation axis of the impeller, wherein the impeller disk comprises a left disk body and a right disk body; cavities are formed in the impeller disk; the impeller disk is formed by splicing at least two blocks; and the cavities are formed by excavating a part of material from the contact face of at least one block. The centrifugal impeller of a novel structure not only overcomes the defect that a center disk of a conventional centrifugal impeller cannot be machined, but also can achieve air convection in the center of the disk through vent grooves, the pressure of the center of the disk is automatically adjusted through centrifugal force on the air in the center of the disk and pressure generated by heat conduction expansion, and the cooling function and the function of reducing the disk deformation can be achieved. Meanwhile, when any block of the impeller disk is severely damaged, the damaged block can be replaced, so that the loss is reduced and cost is saved. The impeller disk is divided into the multiple blocks, then each block can be machined independently, and the machining process difficulty is reduced compared with that of double-sided overall machining.

Description

technical field [0001] The present invention relates to the technical field of compressors, and more specifically, to a double-sided centrifugal impeller. Background technique [0002] The structure of an existing double-sided intake centrifugal impeller is as attached figure 1 Shown; Centrifugal impeller is made of left blade 101, right blade 102 and impeller disc 103, and its axis of rotation is 106. When the centrifugal impeller is working, the airflow flows along with the inlets of the left blade 101 and the right blade 102 to rotate and pressurize. [0003] The disadvantage of the existing double-sided intake centrifugal impeller disc is that due to the limitation of the processing of the left and right blades and the limitation of the processing tool, the impeller disc 103 can only be processed at the left inlet processing surface 104 and the right inlet processing surface 105. The central part cannot be further processed, resulting in excessive stress on the center ...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the existing double-sided intake centrifugal impeller disc is that due to the limitation of the processing of the left and right blades and the limitation of the processing tool, the impeller disc 103 can only be processed at the left inlet processing surface 104 and the right inlet processing surface 105. The center part cannot be further processed, resulting in too much stress on the center of the disc and cannot be released, resulting in large deformation, and at the same time, it is impossible to reduce weight. Due to the excessive weight of the wheel disc, it will cause serious rotor dynamics problems

In addition, since the disk body is a whole, when either the left blade or the right blade is partially damaged, the entire centrifugal impeller disk may be scrapped, resulting in greater losses

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