Optimized design method for trimming centrifugal pump impeller cover plate

A centrifugal pump impeller, optimized design technology, applied in the field of centrifugal pump research, can solve the problems affecting the working environment and overall performance, the low vibration and low noise design of the centrifugal pump is not paid enough attention, and only pays attention to the efficiency, cost and life of the centrifugal pump. Reduce the effect of severe pressure pulsation, stabilize the flow, and reduce the effect of vibration and noise

Active Publication Date: 2016-12-14
JIANGSU UNIV
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  • Description
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Problems solved by technology

[0004] The traditional design method only pays attention to the efficiency, cost and life of the centrifugal pump, but does not pay enough attention to the low vi

Method used

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  • Optimized design method for trimming centrifugal pump impeller cover plate
  • Optimized design method for trimming centrifugal pump impeller cover plate
  • Optimized design method for trimming centrifugal pump impeller cover plate

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Embodiment approach

[0025] figure 1 Shown is an embodiment of the optimal design method for trimming the impeller cover plate of the centrifugal pump according to the present invention, and the optimal design method for trimming the impeller cover plate of the centrifugal pump includes the following steps:

[0026] S1. Select the trimming parameters of the impeller cover plate of the centrifugal pump, and determine the design range of the trimming parameters, and design 20 to 200 groups of trimming schemes by using the optimal Latin hypercube test design method;

[0027] S2. Carry out three-dimensional modeling of the impeller basin of each group of schemes, divide the grid and assemble it with the fluid domain grid of the original pressurized water chamber, use ANSYS CFX software to perform steady and unsteady calculations, and obtain the external characteristics of each scheme through the steady calculation;

[0028] S3. Extract the pressure time-domain fluctuations on the interface between the...

Embodiment

[0033] Taking a low specific speed centrifugal pump IS50-32-160 as an example, the design flow of the pump is 6.3m 3 / h, pump impeller outlet diameter D 2 = 160mm, design head H = 8m, efficiency η = 65%, the thickness of the outlet of the front cover is equal to the thickness of the outlet of the rear cover, namely B 1 =B 2 = 4 mm. When the pump was working under the design conditions, severe vibration and noise were produced, so the design method of the present invention was adopted to improve it, and the design steps were as follows:

[0034] S1. Select the trimming thickness of the front cover B 3 , Rear cover trimming thickness B 4 , Front cover trimming diameter d 1 , Rear cover trimming diameter d 2 , and determine the design range of trimming parameters, respectively (0, 2], (0, 2], [80, 160), [80, 160), using the optimal Latin hypercube experiment design method, to obtain 25 groups of designs Program;

[0035] S2. Carry out three-dimensional modeling of the imp...

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Abstract

The invention belongs to an optimized design method for trimming a centrifugal pump impeller cover plate in the field of centrifugal pump research. The optimized design method includes following steps: selecting trimming parameters of the centrifugal pump impeller cover plate, determining a design range of the trimming parameters, and adopting an optimal Latin hypercube experiment design method to obtain different design schemes; simulating each scheme to acquire external characteristics and flow induced noise, building a function relation between the trimming parameters and the induced noise as well as the external characteristics according to a response face model, and applying a genetic algorithm for solving to acquire optimal optimized design parameters. On the premise that the external characteristics of a centrifugal pump are unaffected strongly, area of an impeller outlet is increased by trimming front and rear cover plates of an impeller, so that axial plane speed of the impeller outlet is reduced, pressure pulse and flow instability at volute tongue are reduced, and the objectives of reducing vibration and lowering noise are achieved.

Description

technical field [0001] The invention belongs to the field of centrifugal pump research, and in particular relates to an optimal design method for trimming the impeller cover plate of the centrifugal pump. Background technique [0002] The pump is the "heart" of the fluid delivery system. It is widely used in various sectors of the national economy and cutting-edge technical fields such as ships, submarines, and aerospace. It is often accompanied by strong vibration and noise during operation. [0003] The noise of centrifugal pumps is mainly divided into mechanical noise and flow-induced noise. With the improvement of manufacturing process level, mechanical noise is gradually controlled, and flow-induced noise in the pump becomes the main noise type. According to the sound mechanism, flow-induced noise is mainly caused by unsteady flow inside the flow field, including cavitation, coupling between moving fluid and solid boundary, mutual interference between fluids, and unstab...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 顾延东袁寿其裴吉张金凤黄茜王逸云
Owner JIANGSU UNIV
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