Connection structure of impeller and drive shaft

Abstract

The invention discloses an impeller and driving shaft connecting structure. The impeller and driving shaft connecting structure comprises a driving shaft, an impeller and an impeller gasket. The driving shaft comprises a conical section and an anti-rotation section connected with the conical section. The cross section of the anti-rotation section is polygonal. The conical section is sleeved with the impeller. The impeller gasket is provided with an anti-rotation groove. The cross section of the anti-rotation groove is similar to that of the anti-rotation section. The impeller gasket and the driving shaft are fixed so that the anti-rotation section can be matched in the anti-rotation groove and the impeller can be connected with the conical face of the conical section. According to the impeller and driving shaft connecting structure, the dynamic balance accuracy of the impeller and the driving shaft is high, the inlet area of the impeller is large, and the impeller and the driving shaft are reliably connected and are quite convenient to assemble and detach.

Description

technical field [0001] The invention belongs to the technical field of transmission, and in particular relates to a connection structure between an impeller and a drive shaft. Background technique [0002] At present, the impeller and the drive shaft generally have the following connection methods: [0003] The keyless connection compresses the impeller by elastically stretching and deforming the drive shaft and recovering the deformed part. For this connection method, on the one hand, the elastic stretch and deformation recovery of the drive shaft are not easy to control, and stress concentration is likely to occur after the drive shaft is stretched; on the other hand, it is transmitted by the compression force generated by the deformation of the drive shaft. The reliability of the torsional force is low, and the assembly and disassembly are time-consuming and laborious; moreover, the keyless connection will reduce the suction inlet area of ​​the impeller, increase the int...

AI Technical Summary

Problems solved by technology

For this connection method, on the one hand, the elastic stretch and deformation recovery of the drive shaft are not easy to control, and stress concentration is likely to occur after the drive shaft is stretched; on the other hand, it is transmitted by the compression force generated by the deformation of the drive shaft. The reliability of the torsional force is low, and the assembly and disassembly are time-consuming and laborious; moreover, the keyless connection will reduce the suction inlet area of ​​the impeller, increase the intake flow rate, and reduce the aerodynamic performance of the impeller

[0004] There is a keyed connection. On the one hand, due to the inconsistency between the design of the keyway and the material of the key and the material of the impeller body, additional dynamic imbalance may occur on the impeller and the drive shaft; on the other hand, because the impeller is designed with a keyway, it needs Considering the local strength of the impeller, the design difficulty of the impeller is increased; moreover, the key connection can only achieve circumferential positioning, lacking axial positioning

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