Method for determining actual working flow of oblique-axis pump station

Abstract

The invention relates to a method for determining an actual working flow of an oblique-axis pump station. The method comprises the following steps of selecting the positions of upstream and downstreampressure measurement cross sections of a water inlet passage; acquiring geometric parameters of the pressure measurement cross sections; arranging pressure measurement cross section pressure pulsation sensors; acquiring and processing measuring point pulsation data; and calculating equivalent differential pressure of the pressure measurement cross sections and calculating and outputting the flowof the oblique-axis pump station. According to the method for determining the actual working flow of the oblique-axis pump station provided by the invention, through a determined relational expressionbetween equivalent differential pressure on two overflowing cross sections of the water inlet passage and the geometric parameters of the pressure measurement cross sections, an overflowing flow of an oblique-axis pump under the condition of nonuniform distribution of low parameters on the overflowing cross sections of the water inlet passage caused when a pump shaft is obliquely disturbed can beconveniently acquired, and the operation adjustment precision of the working conditions of the oblique-axis pump is improved, so that the oblique-axis pump station is ensured to safely and reliably work.

Description

technical field [0001] The invention relates to the field of water conservancy engineering technical parameter measurement, in particular to a method for determining the actual working flow of an inclined-axis pumping station. Background technique [0002] In the pumping station project, it is often necessary to measure the actual flow of the pumping station during operation, and adjust the working condition of the water pump accordingly to ensure the water supply requirements and make the water pump run in the high-efficiency area. Due to the large cross-sectional area of ​​the water inlet channel of the conventional low-lift water transfer pumping station (generally more than 3m×5m), and the non-circular regular cross-section made of concrete, ultrasonic flowmeters cannot be used, and flow can only be measured by pressure difference The flow rate is measured by the method, that is, the flow rate is calculated according to the pressure difference on the two sections of the ...

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Problems solved by technology

[0005] In view of the above problems, the object of the present invention is to provide a method for determining the actual working flow rate of the inclined axis pumping station, so as to solve the problem of disturbance of the pump shaft inclination angle on the outlet section pressure of the water inlet channel during the traditional differential pressure flow measurement, and reduce the Flow Measurement Error of Small Inclined Axis Pumping Station

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