Fault diagnosis system and method for fuel delivery pump

An oil pump, piezoelectric technology, applied in the field of oil pump fault diagnosis system, can solve the problems of poor flexibility, difficult replacement, low functional accuracy, etc., to achieve the effect of improving efficiency and accuracy

Inactive Publication Date: 2014-10-29
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of detection device has simple functions, low precision and is easily affected by various external factors, especially its poor flexibility and difficulty in replacement

Method used

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  • Fault diagnosis system and method for fuel delivery pump

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Effect test

Embodiment 1

[0021] see figure 1 , a specific fuel pump diagnosis system includes: a first piezoelectric acceleration sensor, a second piezoelectric acceleration sensor, a third piezoelectric acceleration sensor, a fourth piezoelectric acceleration sensor, a first temperature sensor, a second temperature sensor sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a temperature measurement module, a signal conditioner, a data acquisition card and an industrial control computer;

[0022] The first piezoelectric acceleration sensor, the second piezoelectric acceleration sensor, the third piezoelectric acceleration sensor, and the fourth piezoelectric acceleration sensor are respectively connected to the signal conditioner;

[0023] The signal conditioner, the data acquisition card and the industrial control computer are connected in sequence;

[0024] The first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth ...

Embodiment 2

[0029] A method for diagnosing an oil pump failure, comprising the steps of:

[0030] 1) The vibration signal acquisition step is to obtain the vibration signal and temperature signal generated by the oil transfer pump through four piezoelectric acceleration sensors and five temperature sensors;

[0031] 2) a signal conditioning step, conditioning and outputting the signal input by the piezoelectric acceleration sensor through a signal conditioner;

[0032] 3) The data collection step is used to collect the signal output by the signal conditioner and the signal uploaded by the temperature measurement module, and upload the collected signal to the industrial control computer;

[0033] 4) The signal analysis step is used to calculate and analyze the vibration signal and temperature signal generated by the oil delivery pump, and diagnose the failure of the oil delivery pump.

[0034] Further, in the step 4), the specific analysis method is to analyze the vibration signal in time...

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PUM

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Abstract

The invention provides a fault diagnosis system and method for a fuel delivery pump. The fault diagnosis system mainly comprises four piezoelectric acceleration transducers, five temperature sensors, a signal conditioner, a temperature measurement module, a data acquisition card and an industrial control computer. The four piezoelectric acceleration transducers are connected with the signal conditioner respectively. The signal conditioner, the data acquisition card and the industrial control computer are connected in sequence. The five temperature sensors are connected with the temperature measurement module respectively. The temperature measurement module, the data acquisition card and the industrial control computer are connected in sequence. The fault diagnosis method comprises the steps of (1) vibration signal acquisition, (2) signal conditioning, (3) data acquisition and (4) signal analysis. The fault diagnosis system can combine the virtual instrument technology, a traditional temperature signal analysis method, a traditional vibration signal analysis method and a modern vibration signal analysis method, thereby effectively improving efficiency and accuracy of fault diagnosis of the fuel delivery pump.

Description

technical field [0001] The invention belongs to the technical field of oil delivery pump fault diagnosis, in particular to a system and method for oil delivery pump failure diagnosis. Background technique [0002] The oil delivery pump is a fluid machine that converts mechanical energy into pressure energy and kinetic energy of the fluid flowing through it under the drive of the oil delivery pump motor. When the oil transfer pump is running normally, the whole unit should be stable and the sound should be normal. If the unit vibrates too much or there is noise, it is often a harbinger of oil pump failure. Generally speaking, the causes of oil pump vibration are: unbalanced rotor, bent pump shaft, worn or damaged bearing, coupling pin or ground The foot bolts are loose, the gap between the bearing bushes is too large, etc. The structure of the fuel pump is complex, there are many moving parts, and there are many excitation sources, so it is relatively difficult to monitor t...

Claims

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Application Information

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IPC IPC(8): F04B51/00
Inventor 黄翼虎王新龙林其安刘文龙马吉祥张银平
Owner QINGDAO UNIV OF SCI & TECH
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