A Flow Prediction Method of Centrifugal Pump Based on Power and Pressure Difference

A technology for flow prediction and centrifugal pumps, applied in pump control, non-variable pumps, special data processing applications, etc., can solve problems such as high cost, poor integration, and inability to effectively predict flow

Active Publication Date: 2017-10-31
ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing centrifugal pump flow measurement or prediction method has the following disadvantages: 1) high cost and poor integration; A certain blind area; 3) There are specific requirements for the distribution of the axial force and radial force on the impeller of the centrifugal pump

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  • A Flow Prediction Method of Centrifugal Pump Based on Power and Pressure Difference
  • A Flow Prediction Method of Centrifugal Pump Based on Power and Pressure Difference
  • A Flow Prediction Method of Centrifugal Pump Based on Power and Pressure Difference

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Embodiment Construction

[0101] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0102] combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Image 6 , a specific implementation of a centrifugal pump flow prediction method based on power and pressure difference is shown below:

[0103] Step 1. Construct a centrifugal pump flow prediction model based on the 'Gray-box modeling' theory;

[0104] According to the principle of energy conservation, the centrifugal pump is divided into three modules as a whole, namely, the motor module (6-1), the mechanical module (6-2) and the hydraulic module (6-3), and each module has corresponding input parameters And the output parameters and the internal energy transfer model, here it is defined as a 'gray box' module, in which the motor module is the first 'gray box'; the mechanical module is the second 'gray box'; the hydraulic module is the third 'gray box' '; For the motor...

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Abstract

A centrifugal pump flow prediction method based on power and differential pressure measurement, characterized in that the method includes the steps: 1. Based on the 'grey box' construction theory, the centrifugal pump is divided into a motor module, a mechanical model and a hydraulic module; 2. Based on the system analysis, construct the mathematical model of the overall flow prediction of the centrifugal pump; 3. Based on the internal loss model of the motor, locally construct the mathematical model of the motor output power prediction; 4. Based on the mechanical loss model, locally construct the output power of the mechanical transmission components (or centrifugal pump input power) prediction mathematical model; 5. Based on the fluid flow loss model, locally build a model between the input power of the centrifugal pump, the flow rate, and the rotational speed, and the model of the pressure difference, flow rate, and rotational speed of the centrifugal pump; 6. Combining the mathematical model of the motor, the mechanical Mathematical model and hydraulic mathematical model, establish a centrifugal pump flow prediction model based on power (speed and torque) and pressure difference; 7. Use compensation algorithm to correct the centrifugal pump flow prediction model to improve the flow prediction accuracy.

Description

technical field [0001] The invention belongs to the field of centrifugal pump measurement and control, and specifically relates to a centrifugal pump flow prediction method based on power and pressure difference, which is mainly used to quickly and accurately predict the flow of the centrifugal pump to monitor the operating state of the centrifugal pump in real time, and at the same time Combining the flow value and the temperature difference value can evaluate the heat or cold consumed by the overall thermal system or air conditioning system equipped with the centrifugal pump within a unit time. The centrifugal pump integrated with the flow prediction algorithm effectively replaces the function of the flow meter in the system, greatly reducing the operating cost of the system. Background technique [0002] Centrifugal pumps are widely used in HVAC, municipal water supply, petrochemical and many other fields. As users pay more and more attention to the reliability of water ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCF04D15/0088
Inventor 吴登昊任芸杨友东蒋兰芳牟介刚刘健
Owner ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
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