Method for detecting transient faults of fire pump in quick starting process

A quick start and water pump technology, applied in pump testing, machine/engine, liquid variable capacity machinery, etc., can solve problems such as burnout, unit equipment and pipeline damage, local power grid overload or current shock, etc.

Inactive Publication Date: 2015-09-09
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sudden start of a large pump unit may cause overload or current shock to the local power grid, causing damage to the load equipment, or even burning out
At

Method used

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  • Method for detecting transient faults of fire pump in quick starting process
  • Method for detecting transient faults of fire pump in quick starting process
  • Method for detecting transient faults of fire pump in quick starting process

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Experimental program
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Effect test

Embodiment Construction

[0033] Characteristic of the present invention can be shown by following technical steps:

[0034] Step 1: Establish a closed circulation pipeline including the fire pump, install a vibration sensor on the base of the fire pump, install a speed torque sensor on the shaft, install a pressure sensor at the inlet and outlet of the fire pump, and install a flow sensor at the outlet of the fire pump to establish a fire pump Controlled testbed.

[0035] Step 2: Set the sampling frequency of the data acquisition card, collect data synchronously from each sensor, obtain the water pressure, pipeline flow, pump vibration, temperature and other signals of the fire pump during the start-up process, and upload them to the host computer in real time through Ethernet , to perform time-domain analysis and processing to obtain signal amplitude and other information.

[0036] Step 3: Calculate the instantaneous head of the fire pump according to the inherent mechanical characteristics and flui...

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PUM

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Abstract

The invention aims at providing a method for detecting transient faults of a fire pump in a quick starting process. The detected object mainly comprises the fire pump, pipelines, a fire water tank, and the like. The method comprises the following steps: controlling the fire pump to start in a condition of different accelerated speeds and pipeline resistances; synchronously collecting signals, such as vibration, temperature, rotating speed, inlet and outlet pressure, and pipeline flow, of the pump by utilizing a data collecting card; transmitting the signals to a host computer in real time for treatment; calculating lift and efficiency of the pump at a transient state according to collected signals; analyzing and treating the characteristic of each physical quantity, including the peak value and the average value of each signal, in time domain during the starting process of the fire pump; performing EMD decomposition of the signals via an HHT method; performing Hilbert transformation of each IMG component obtained from decomposition to obtain characteristic parameters, such as the amplitude spectrum and the instantaneous frequency of each signal, representing operating state of the pump; and inputting the extracted characteristic parameters into a RBF neural network for fault diagnosis to reveal an transient operating state of the fire pump in the quick starting process.

Description

technical field [0001] The invention provides a method for detecting the transient failure of the fire-fighting water pump during the rapid start-up process. Specifically, when the fire-fighting water pump is started up quickly, the speed, flow rate, etc. The changing signal data is used to calculate the instantaneous head and efficiency of the fire pump, and the HHT method is used to process the pressure, transient head, efficiency, speed and non-stationary vibration signals to obtain characteristic parameters that can characterize the operating state of the fire pump, such as instantaneous frequency Input the extracted feature quantities into the RBF neural network for fault diagnosis, and analyze the change characteristics of various physical quantities during the start-up process of the fire pump, thereby revealing the transient characteristics of the fire pump in the process of changing the operating state, and carry out Troubleshooting. Background technique [0002] T...

Claims

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Application Information

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IPC IPC(8): A62C37/50F04B51/00
CPCA62C37/50F04B51/00
Inventor 柴毅屈剑锋张国洲陈鹏任浩
Owner CHONGQING UNIV
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