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Method for testing rotary speed of water pump

A test method and water pump technology, which are applied to devices using fluids, etc., can solve problems such as unacceptable test conditions, inconvenient testing, and inability to install a speed torque meter, so as to achieve accurate measurement, save experimental equipment and experimental costs, Wide range of effects

Inactive Publication Date: 2014-05-28
WUHAN UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0002] In the field test of the pump station, the speed of the water pump is generally tested by pasting a reflective sheet on the pump shaft and using a digital hand-held tachometer to align the reflective sheet. Below the pump room floor, the test is inconvenient
In laboratory experiments, digital hand-held tachometers or speed torque meters are generally used for speed measurement, but sometimes due to the limitations of the experimental site or experimental conditions, it is impossible to use digital hand-held tachometers for speed tests or install speed torque meters
A method and device for detecting the rotational speed of a vane pump are applicable to water pumps driven by three-phase asynchronous motors, but not applicable to water pumps driven by synchronous motors and other powers, such as hydraulically driven mobile pumps, etc.

Method used

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  • Method for testing rotary speed of water pump
  • Method for testing rotary speed of water pump
  • Method for testing rotary speed of water pump

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings. Such as Figure 1-6 As shown, a water pump speed test device includes the following steps:

[0018] 1. Arrange a pressure transmitter for testing pressure pulsation on the outlet pipe near the outlet of the water pump;

[0019] 2. Connect the pressure transmitter with the signal acquisition and analysis system and perform signal acquisition;

[0020] 3. Perform fast Fourier transform on the collected signal, starting from the low frequency, according to the frequency of the harmonic component as the fundamental frequency f 1 Integer multiples of , and there is a frequency f of the harmonic component b is the fundamental frequency f 1 Multiples of the number of blades to determine the fundamental frequency f 1 , fundamental frequency f 1 is the frequency f n , to calculate the actual speed of the pump.

[0021] The conversion frequency f n If the frequency resolu...

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Abstract

A method for testing the rotary speed of a water pump comprises the following steps of installation of a pressure transmitter and a signal collecting analysis system, signal collection, spectral analysis, rotary frequency determination and rotary speed determination. The method has the advantages that the pressure transmitter is installed on the portion, close to a water pump outlet, of a water outlet pipe and can be used for measuring the rotary speed and measuring the water pump lift, so that experiment devices are reduced and experiment cost is saved; measurement is accurate, the application range is wide, and the method can be applied to on-site testing and experiments which are not suitable for other methods for measurement.

Description

technical field [0001] The invention relates to the technical field of water pumps, in particular to a method for testing the rotational speed of a water pump. Background technique [0002] In the field test of the pump station, the speed of the water pump is generally tested by pasting a reflective sheet on the pump shaft and using a digital hand-held tachometer to align the reflective sheet. Below the ground level of the pump room, the test is inconvenient. In laboratory experiments, digital hand-held tachometers or speed torque meters are generally used for speed measurement, but sometimes due to the limitations of the experimental site or experimental conditions, it is impossible to use digital hand-held tachometers for speed tests or install speed torque meters . The method and device for detecting the rotational speed of a vane pump are applicable to water pumps driven by three-phase asynchronous motors, but not applicable to water pumps driven by synchronous motors ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/26
Inventor 王志远钱忠东王凡张建军吴鹏飞
Owner WUHAN UNIV
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