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Frequency conversion centrifugal pump optimal regulating method and system based on pressure pulsation

A technology of pressure pulsation and adjustment method, which is applied to the components of pumping devices for elastic fluids, non-variable pumps, pumps, etc., which can solve problems such as unstable flow, long cycle, and difficult capture, and achieve safety and stability The effect of operational assurance

Active Publication Date: 2018-07-10
CHANGZHOU ENGIPOWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PIV technology has a high cost and a long cycle, which is not conducive to engineering applications, so pressure pulsation measurement for pumps has become the mainstream
At present, the research on the pressure pulsation on the pump is mainly concentrated in the time domain and frequency domain, and it is difficult to capture some features, and these two methods cannot well identify whether there is such a rotating unstable flow inside the pump.

Method used

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  • Frequency conversion centrifugal pump optimal regulating method and system based on pressure pulsation
  • Frequency conversion centrifugal pump optimal regulating method and system based on pressure pulsation
  • Frequency conversion centrifugal pump optimal regulating method and system based on pressure pulsation

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Embodiment 1

[0065] Such as figure 1 As shown, this embodiment provides an optimal adjustment method for a variable frequency centrifugal pump, including the following steps:

[0066] Step S1, collecting data at each pressure pulsation monitoring point of the variable frequency centrifugal pump;

[0067] Step S2, calculating the variables required for phase correlation analysis; and

[0068] Step S3, adjusting the working conditions of the variable frequency centrifugal pump through phase correlation analysis.

[0069] The method for collecting data at each pressure pulsation monitoring point of the variable frequency centrifugal pump in the step S1 includes:

[0070] Such as figure 2 Shown is a schematic diagram of the pump device. Section A and section B in the figure are respectively located at the inlet section or outlet section of the pump. You can choose the appropriate section by yourself. Such as image 3 As shown, pressure pulsation monitoring points uniformly distributed in t...

Embodiment 2

[0125] On the basis of the above-mentioned embodiment 1, this embodiment also provides a variable frequency centrifugal pump optimization adjustment system, including:

[0126] A number of pressure pulsation sensors are evenly distributed in the circumferential direction of the inlet section or outlet section of the variable frequency centrifugal pump;

[0127] The processor module calculates the characteristic frequency of each pulsating pressure data, and adjusts the working condition of the variable frequency centrifugal pump through phase correlation analysis.

[0128] In this embodiment, the corresponding working process of the processor module has been described in detail in Embodiment 1, and will not be repeated here.

[0129] The present invention only needs to arrange a pressure pulsation sensor at the inlet section or outlet section of the pump, without damaging the frequency conversion centrifugal pump, it can relatively judge the unstable flow with the rotation com...

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Abstract

The invention relates to a frequency conversion centrifugal pump optimal regulating method and system based on pressure pulsation. The frequency conversion centrifugal pump optimal regulating method includes the following steps that S1, all pressure pulsation monitoring points of a frequency conversion centrifugal pump are subjected to data collection; S2, the variable required in phase position correlation analysis is calculated; and S3, the working condition of the frequency conversion centrifugal pump can be adjusted through phase position correlation analysis. According to the frequency conversion centrifugal pump optimal regulating method and system based on pressure pulsation, only a pressure pulsation sensor needs to be arranged on the inlet section or the outlet section of the pump, instable flow with rotational components inside the pump can be judged easily on the premise of not damaging the pump, a guiding function is provided for optimal regulation of the frequency conversion pump, and power minimum is not used as the optimizing index of frequency conversion pump regulation any more. By adoption of the method, a guarantee can be provided for the efficiency and service life of the pump as well as safe and stable operation of the whole system.

Description

technical field [0001] The invention relates to the field of operation monitoring of frequency conversion centrifugal pumps, and relates to a pressure pulsation-based optimization adjustment method and system for frequency conversion centrifugal pumps. Background technique [0002] The frequency conversion centrifugal pump is an important equipment in the heating system, and it is also an important part of the entire hydraulic balance adjustment. In order to balance the flow of the entire system, variable frequency centrifugal pumps often need to operate with variable flow. However, during the adjustment process, unstable flows are prone to occur inside them, such as rotating stall, rotating cavitation, backflow vortex, etc. These rotating components appear as vortices The form, and the size, quantity, and speed of the vortex will change with the rotation of the blades, which greatly intensifies the unsteady flow inside the pump. At the same time, these flow forms will even...

Claims

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Application Information

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IPC IPC(8): F04D15/00F04D29/00
CPCF04D15/00F04D15/0066F04D29/007
Inventor 沈陈栋赵琼石洋
Owner CHANGZHOU ENGIPOWER TECH
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