Axial flow pump guide vane body with high specific speed

A guide vane, axial flow pump technology, applied in the direction of the pump, the components of the pumping device for elastic fluid, the pump element, etc. The effect of improving the efficiency of the device, increasing the overflow space, and reducing the hydraulic loss

Inactive Publication Date: 2010-11-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 con

Method used

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  • Axial flow pump guide vane body with high specific speed
  • Axial flow pump guide vane body with high specific speed
  • Axial flow pump guide vane body with high specific speed

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1, the application of the guide vane body in the vertical axial flow pump device with straight pipe outlet after increasing the diffusion angle, see image 3 shown. Due to the increased diffusion angle of the guide vane body, the diameter of the outlet is increased, which increases the flow space for the subsequent straight pipe outlet flow channel, but does not increase the maximum width of the outlet flow channel, and does not need to increase civil construction investment. Due to the increase of the flow space of the outlet channel and the reduction of the flow velocity, the hydraulic loss is greatly reduced. Since the hydraulic loss of the outlet channel in large-scale low-lift pumping stations accounts for 70% to 80% of the total loss of the inlet and outlet channels, it can be Effectively improve the efficiency of the pump device.

Embodiment 2

[0030] Embodiment 2, the application of the guide vane body in the vertical axial flow pump device with siphon water outlet after increasing the diffusion angle, see Figure 4 shown. Due to the increase of the outlet diameter of the guide vane body, the flow space of the water outlet channel has also been increased, but only the overall width of the gradual expansion section in the front part of the siphon outlet channel has been increased, and the maximum diameter of the flow channel has not been increased. However, the efficiency of the pump device can be effectively improved.

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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 ...

Claims

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Application Information

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IPC IPC(8): F04D29/54
Inventor 李彦军施伟黄道见邓东升
Owner JIANGSU UNIV
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