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Design method for inducer with long and short blades of nuclear main pump

A technology with long and short blades and a design method, which is applied to the components, pumps, and pump elements of the pumping device for elastic fluids, and can solve the problems of surface damage of flow components, drop of inducer outlet pressure, and change of machine energy characteristics. , to achieve the effect of improving the anti-cavitation ability

Inactive Publication Date: 2013-09-18
JIANGSU UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main function of the inducer is to improve the anti-cavitation ability of the pump. These two conventional inducers can improve the anti-cavitation ability of the pump to a certain extent, but when the flow rate of the pump is further increased, due to the increase of the flow rate The increase of the outlet velocity of the inducer leads to the decrease of the outlet pressure of the inducer, and when the inlet pressure of the impeller is too low, cavitation may occur
The cavitation phenomenon of the pump has a great impact on the normal operation of the pump. The main hazards are: 1. Changes in the energy characteristics of the machine: after a certain level, the parameters such as the efficiency, power, and flow of the machine will drop sharply. 2. Cause Noise and vibration, 3 surface damage of wetted parts

Method used

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  • Design method for inducer with long and short blades of nuclear main pump
  • Design method for inducer with long and short blades of nuclear main pump
  • Design method for inducer with long and short blades of nuclear main pump

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Embodiment Construction

[0066] figure 1 and figure 2 Together determine the shape of this embodiment inducer. It, like most conical inducers, has a hub (1), which is conical. The blades of the inducer are divided into two types: long blades (7), (8) and short blades (9), (10). The long and short blades are arranged alternately. The middle part of the inducer continues to the outlet, and its main purpose is to scour the wake, improve the flow of the liquid, and then improve the anti-cavitation ability of the pump. image 3 It is a schematic diagram of a nuclear main pump, showing the installation position of the inducer in the nuclear main pump, and its fixing method is threaded. As shown in the figure below: (2) is the inducer, (3) is the impeller, (4) is the guide vane, (5) is the suction steel pipe, and (6) is the pump casing.

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Abstract

The invention relates to a design method for an inducer with long and short blades of a nuclear main pump. According to the design method, blades of the inducer are improved as a mode that the long and short blades are spaced on the basis of a common inducer, and the outlets of the long and short blades are positioned in the same interface, so that the characteristics of the long and short blades and the inducer are combined, and a novel inducer capable of improving the speed distribution of a liquid and improving the anti-cavitation capability of the pump can be designed.

Description

Technical field: [0001] The invention relates to an inducer, in particular to an inducer with long and short blades. Background technique: [0002] At present, there are two types of inducers used: one is a cylindrical inducer, and the flow area of ​​the inlet and outlet of the inducer is the same; the other is a conical inducer, and the flow area of ​​the inlet of the inducer is the same. The area is large and the outlet flow area is small. This structure can improve the anti-cavitation ability of the inducer itself, so it is widely used. The main function of the inducer is to improve the anti-cavitation ability of the pump. These two conventional inducers can improve the anti-cavitation ability of the pump to a certain extent, but when the flow rate of the pump is further increased, due to the increase of the flow rate The increase of the outlet velocity of the inducer leads to the decrease of the outlet pressure of the inducer, and when the inlet pressure of the impeller...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/00F04D29/66
Inventor 付强朱荣生袁寿其王秀礼习毅
Owner JIANGSU UNIV
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