A method for detecting the package block of the main reduction gear of the automobile drive axle
A drive axle and gear technology, which is applied in the field of detection of main and reduction gear blocks of automobile drive axles, can reduce misjudgments and misjudgments, and improve quality and noise failures.
Active Publication Date: 2018-05-18
CHONGQING UNIV OF TECH +2
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Problems solved by technology
The difficulty of this method is how to use an effective vibration signal detection method to extract the characteristic information of the measured object
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Embodiment
[0026] Embodiment: A method for detecting a main reduction gear block of an automobile drive axle, comprising the following steps:
[0027] 1) Install a vibration acceleration sensor on the box body of the drive axle, and install a speed pulse sensor at the input end of the drive axle;
[0028] 2) Drive the input end of the driving axle by the drive motor, obtain the vibration acceleration signal through the vibration acceleration sensor, and obtain the output speed pulse signal through the input speed pulse sensor;
[0029] 3) Input the obtained (input terminal) speed pulse signal and (drive axle box) vibration acceleration signal into the data collector after amplifying and filtering, and the data collector converts the analog signal into a digital signal and then inputs it into the computer;
[0030] 4) The computer converts the vibration-time signal into a vibration-angle position signal according to the obtained speed pulse signal, and uses the change of the vibration sig...
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The invention discloses a bump detection method of a main speed-reducing gear of an automobile driving axle. The bump detection method comprises the following steps: (1) mounting a vibration acceleration sensor on a box body of the driving axle; mounting a rotary speed pulse sensor at the input end of the driving axle; (2) acquiring a vibration acceleration signal and acquiring an output rotary speed pulse signal; (3) inputting the acquired rotary speed pulse signal of the input end and the vibration acceleration signal into a computer; and (4) converting a vibration-time signal to a vibration-angle position signal by the computer according to the acquired rotary speed pulse signal, and positioning defect parts of the driving axle to be detected by utilizing changes of the rotary vibration signal of the main speed-reducing gear of the driving axle to be detected, and the position information of a corresponding rotary angle. With the adoption of a method for extracting characteristic information of operation healthy conditions by using a vibration signal peak value searching method, wrong judgment and incorrect judgment caused by traditional subjective evaluation on whether the main speed-reducing gear of the driving axle has bump defects or not can be greatly reduced.
Description
technical field [0001] The invention relates to the technical field of NVH (vibration, noise, harshness) detection of automobiles, in particular to a method for detecting package blocks of main reduction gears of automobile drive axles. Background technique [0002] The drive axle is an important part of the automobile transmission system, which is responsible for the transmission of power, and also contributes a lot to the noise of the vehicle. During the working process of the driving axle, the abnormality of any part will cause the driving axle to work abnormally, which will lead to the noise or early failure of the driving axle. For drive axle manufacturers, the bench testing of drive axles mainly depends on the subjective judgment of the operator on the noise of the drive axle testing on the bench. At the same time, because there is no objective vibration testing equipment, it also brings great difficulties to future fault diagnosis. [0003] Protrusions (lumps) on th...
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IPC IPC(8): G01M13/02G01M7/02
CPCG01M7/025G01M13/021G01M13/028
Inventor 李文礼石晓辉施全王晶晶郭凯
Owner CHONGQING UNIV OF TECH