Method for designing non-overload vortex pump impeller with edge folding blades

A design method and technology of vortex pumps, which are applied to components, pumps, and pump components of pumping devices for elastic fluids, can solve problems such as increasing power reserve coefficients, energy waste, and increased investment, and achieve reduced circulation Effects of flow loss, investment reduction, and energy saving

Inactive Publication Date: 2010-08-04
江苏国泉泵业制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In the past, the main way to solve this problem is to increase the power reserve factor, and multiply the shaft power at the design point of the vortex pump by a factor not less than 1.4

Method used

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  • Method for designing non-overload vortex pump impeller with edge folding blades
  • Method for designing non-overload vortex pump impeller with edge folding blades
  • Method for designing non-overload vortex pump impeller with edge folding blades

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Embodiment Construction

[0028] figure 1 and figure 2 Together determine the impeller shape for this embodiment. Like most centrifugal pump impellers, it has an impeller back cover (1) and is an open impeller. The direction of the flanging (6) is opposite to the direction of rotation of the impeller. When the vortex pump is running, the folded edge (6) can limit the circulation flow from radial direction to axial direction, reduce the loss of circulation flow, and improve the lift and efficiency. The present invention determines the outlet width b of the impeller blades through the following relational expressions 2 , The diameter of the outer circle of the impeller blade D 2 , The outlet angle β of the impeller blade 2 , impeller blade wrap angle and the flange width B, so that the performance of the vortex pump in this embodiment meets the requirements of the full head.

[0029] D 2 = 18 2 gH ...

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Abstract

The invention relates to a method for designing a non-overload vortex pump impeller with edge folding blades. In the method, the main geometric parameters of the blades such as external diameter, outlet width, outlet angle, wrap angle and folding edge width are given. The impeller designed by the invention not only can improve the flow condition in the volute and improve the lift and the efficiency of the vortex pump, but also meet the non-overload requirement of the vortex pump, thus reducing the capacity of the matching motor, lowering the investment and saving the energy.

Description

technical field [0001] The invention relates to a method for designing the main parts of a non-variable pump, in particular to a method for designing an impeller of a non-overloaded vortex pump with folded blades. Background technique [0002] At present, known vortex pumps use radial impellers, which can only ensure that the vortex pump operates within a narrow flow range. If the operating conditions exceed the pump's operable range, the motor may burn out. However, the operating conditions of the vortex pump vary greatly, and the head of the pump device will change greatly, resulting in the actual working point of the vortex pump moving within a large flow range. According to statistics, about 70% of the faults of the repaired submersible pumps are caused by overload. The reliability of this type of pump is low due to the failure of the motor due to overload, which greatly limits the scope of use of the vortex pump. At the same time, due to the special structure of the v...

Claims

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Application Information

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IPC IPC(8): F04D29/22
Inventor 朱荣生苏保稳杨爱玲付强
Owner 江苏国泉泵业制造有限公司
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