Optimum design method for gap between movable part and static part of centrifugal pump

Abstract

The invention provides an optimum design method for a gap between the movable part and the static part of a centrifugal pump. The optimum design method comprises the steps of using a value calculation method of combining a response spectrum with fluid-structure interaction, and considering an earthquake force and a fluid excitation force simultaneously to obtain quantitative deformations at an impeller opening ring and an impeller outlet in the multi-operating mode of a residual heat removal pump. The law of deformation between the movable part and the static part in the multi-operating mode of the residual heat removal pump is obtained by virtue of the calculation of combining the earthquake response spectrum with fluid-structure interaction, and by using the method of considering the influence of the earthquake force and the fluid excitation force on an impeller, so as to optimize the design for the gap between the movable part and the static part of the residual heat removal pump. The method is based on an earthquake response spectrum analysis and a fluid-induced vibration analysis, thus the design for the gap between the movable part and the static part of the centrifugal pump for nuclear power is more reasonable, a more accurate calculation result is provided for the structural design for the centrifugal pump, and novel design thinking and method are provided for the optimum design for the centrifugal pump structure for nuclear power.

Description

technical field [0001] The invention relates to the field of centrifugal waste heat discharge pumps used in nuclear power, in particular to a method for optimizing the clearance between dynamic and static components of a centrifugal pump. Background technique [0002] According to the statistics of the PDE database in the United States, there have been 1,062 earthquakes of magnitude 6 or above, 161 earthquakes of magnitude 7 or above, and 19 earthquakes of magnitude 8 or above in the past ten years. On March 14, 2011, the Fukushima nuclear power plant in Japan faced the danger of explosion due to insufficient earthquake resistance design; the magnitude 6.5 earthquake in Iran in 2010; the Sichuan earthquake in China in 2008, etc. Due to the frequent occurrence of earthquakes, people are gradually aware of the great danger of earthquakes. These earthquakes are placed in front of engineers, which put forward higher requirements for our nuclear power plant's anti-seismic capabil...

AI Technical Summary

Problems solved by technology

However, in the existing seismic analysis, the fluid excitation force is not considered, and there is no relevant report that the seismic force and the deformation under the action of the fluid excitation force are used to guide the optimal design of the centrifugal pump structure.

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