Water pump efficiency, flow and lift detection method and system

Abstract

The invention relates to a water pump efficiency, flow and lift detection method and system. The method comprises the steps of obtaining the output power f and the output frequency P<f>, <output>, of a frequency changer, wherein the frequency changer is in signal connection with a water pump; and according to the output power f and the output frequency P<f>, <output>, of the frequency changer, calculating the flow Qf, the lift Hf and the efficiency Eta f of the water pump. According to the water pump efficiency, flow and lift detection method and system, a controller reads the output power and the output frequency of the frequency changer; and according to the output power and the output frequency of the frequency changer, the flow, lift and efficiency of the water pump can be calculated. The structure is simple, and measurement can be achieved without installing of a pressure sensor and a flow meter; meanwhile, through PID real-time control and measurement display, the precision of measured water pump performance data is high, errors brought by manual measurement and treatment are overcome, the measurement efficiency is improved, high precision and high automation of the water pump performance measurement are achieved, the water pump performance measurement cost is reduced, and the measurement time is shortened.

Description

technical field [0001] The invention relates to the technical field of water pump performance detection, in particular to a water pump efficiency, flow and head detection method and system. Background technique [0002] As an important fluid machine, water pumps are widely used in various sectors and fields of industry, agriculture and people's lives. The work of the water pump is reflected by the delivery flow, pressure generation, power and efficiency. There is a corresponding relationship between these parameters. When the speed and flow change, it will cause corresponding changes in parameters such as power, lift and efficiency. In use, the pump must be selected with reference to the pump performance curve, and its operating point must be determined in order to keep it running in the high-efficiency zone. It can also provide reliable performance data feedback and support for the design, production and use of water pumps, so as to use water pumps reasonably, and promote ...

AI Technical Summary

Problems solved by technology

In this way, not only the adjustment of the working conditions is slow, time-consuming and labor-intensive, the labor intensity is high, the cycle is long, the test efficiency and accuracy are low, and the stability is poor.

It is difficult to meet the requirements of modern water pump detection and treatment

[0004] Therefore, some people put forward the energy-saving heat meter flow verification technology to overcome the problems existing in the existing instrument detection technology, to a certain extent reduce energy consumption and improve measurement accuracy, making it more practical, and some people use the characteristic curve of the water pump A simple measurement method for the full head and outlet flow of the pump is proposed, but it still cannot meet the requirements

[0005] Although there are also intelligent detection systems for water pump performance in China, most of them have problems such as large systems, complicated interfaces, high prices, poor human-computer interaction interface friendliness, and complicated operations.

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