Axial flow pump guide vane body with high specific speed

Abstract

The invention discloses an axial flow pump guide vane body with high specific speed, overcoming the deficiencies that the traditional axial flow pump guide vane body with high specific speed has larger hydraulic loss, resulting in lower efficiency of a water pump. In the invention, a diffusion angle of a conical tube of the guide vane body is enlarged to enable a single-edge diffusion angle thereof to be ranged from 6 degrees to 10 degrees; because the diffusion degree of the guide vane body is increased, the flow rate is lowered on the basis of ensuring not to cause side wall flow separation, thereby efficiently lowering the hydraulic loss of the guide vane body and enhancing the efficiency of the pump; and also because the diffusion angle of the guide vane body is enlarged and the outlet diameter is increased, a flowing space of a latter water outlet channel is also increased, the hydraulic loss of the water outlet channel is lowered, and the pump device efficiency is further improved.

Description

Technical field: [0001] The invention relates to a rear guide vane body of an axial flow pump with high specific speed, belonging to the field of hydraulic machinery. Background technique: [0002] The guide vane is an important component of the axial flow pump. After the liquid flow flows out of the impeller of the axial flow pump, it has a certain outlet vortex energy, accounting for 6% to 20% of the total energy (specific rotation number n s =1600~500). If the rotating liquid enters the pressure water pipe directly, the kinetic energy of the rotation will be completely lost in the pipe. The function of the guide vane of the axial flow pump is to effectively convert most of the vortex energy at the outlet of the impeller into pressure energy. Therefore, the guide vane body has a great influence on the performance of the axial flow pump. [0003] Pump specific speed n s The expression is: [0004] n s = 3.65 ...

AI Technical Summary

Problems solved by technology

[0012] At present, my country's axial flow pump impeller has reached a relatively high design level, such as the patent number: ZL02133456.0 "Axial Flow Pump Impeller Blade", but there is generally a problem of insufficient research on the guide vane body, especially the contrast ratio The guide vane body of the axial flow pump with the number of revolutions is still designed according to the design method of the guide vane body with the low specific speed, resulting in low efficiency of the axial flow pump with low head and high specific speed

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