Volute structure

Abstract

The invention relates to a volute structure. The volute structure comprises a lower volute, an impeller, an impeller nut, an upper volute, a mechanical sealing structure, a rotating shaft and an exhaust valve; the upper volute is located below the lower volute, and the lower volute and the upper volute are fixed together through a fixing device; the impeller is mounted on the rotating shaft; a liquid inlet is formed in the upper volute, and a liquid outlet is formed in the lower volute; the impeller is positioned in the lower volute; the rotating shaft penetrates through the upper volute and the lower volute; a containing cavity of the upper volute is larger than a containing cavity of the lower volute; and the top of the upper part of the upper volute is higher than the top of the liquidinlet. According to the volute structure, aiming at the low-reliability phenomena of cavitation, mechanical seal damage, short bearing life and the like of a single-stage centrifugal pump in the pumpindustry at present, a novel single-stage centrifugal pump volute structure is designed, and the reliability problem generated by the single-stage centrifugal pump can be better solved. The volute structure enables the performance of the whole pump to be improved, machining and manufacturing are simple and efficient, and comprehensive cost is reduced.

Description

technical field [0001] The invention relates to a volute structure, in particular to a volute structure with simple and efficient processing, compact structure and convenient installation, which can improve the comprehensive reliability of a single-stage centrifugal pump. Background technique [0002] At present, the volute structure of a single-stage centrifugal pump is a spiral structure, which can better collect the high-pressure water generated by the work of the impeller, but the volute structure is complicated to process, and the low machining accuracy affects the external design characteristics of the centrifugal pump. The traditional volute structure is horizontal and vertical. The inlet and outlet of the volute are on the same horizontal line or the inlet is below the outlet. The impeller is prone to cavitation, which increases the hydraulic loss of the pump itself and reduces the head and efficiency of the pump. At the same time, the impeller The axial force genera...

AI Technical Summary

Problems solved by technology

[0002] At present, the volute structure of single-stage centrifugal pumps is a spiral structure, which can better collect the high-pressure water generated by the work of the impeller, but the volute structure is complicated to process, and the machining accuracy is not high, which affects the external design characteristics of the centrifugal pump.

The traditional volute structure is horizontal and vertical. The inlet and outlet of the volute are on the same horizontal line or the inlet is below the outlet. The impeller is prone to cavitation, which increases the hydraulic loss of the pump itself and reduces the head and efficiency of the pump. At the same time, the impeller The axial force generated by the rotation affects the reliability of the rotor system

Images