Analysis, evaluation and monitoring of the characteristic frequencies of pneumatic drive unit and its bearing through their corresponding frequency spectra and spectral density

Abstract

AnAlysis, evAluAtion And monitoring of the chArActeristic frequencies of pneumAtic drive unitAnd its beAring through their corresponding frequency spectrA And spectrAl density AnAlizA, ocenA i monitorowAnie częstotliwości chArAkterystycznych pneumAtycznego zespołu nApędowego i wchodzącego w jego skłAd łożyskA nA podstAwie widm częstotliwości orAz gęstości widmowej This article shows the results of the study of the characteristic frequencies of pneumatic drive equipment and its suspension bearing. The analysis approaches one of the most important requirements of the industrial sector, which seeks to be recognised by the efficiency and performance of its equipment when compared to its coming economic competitors. For data collection and we have followed the ISO 10816 standards, thus using the values of speed in RMS, aiming to reduce the masking of these signals that occurs depending on whether they are high or low frequencies. The study will respond to one of the most important requirements found in the predictive and preventive control of industrial sites. The problem of the predictive systems of maintenance of equipment with bearings lies in the number of monitoring and analysis points that generate a high cost in time and human resources. The aim will be to determine which of all the study frequencies is the most significant and in which position and measurement axis has the biggest impact. To do this, we will analyse the rotation frequency of the blowing machine, the resulting frequency of all the frequencies, the frequency of the impulsion blades and finally the frequency of the bearing. The study would be able to predict when our equipment is going to suffer a failure, reducing the control points and the cost.

Evaluation procedure for blowing machine monitoring and predicting bearing SKFNU6322 failure by power spectral density

“…Other studies determine that the turning variable of the machine generates more incidence in POS4V. In the case of the blades, the axial position would be the most important [2,3]. In the Table 9 shows the comparison of the three frequencies.…”

Hybrid methodology using balancing optimization and vibration analysis to suppress vibrations in a double crank-rocker engine

“…Representation of FRF and system response usually can be introduced using one of three measurements, namely receptance identified by displacement X, mobility identified by velocity X  , or inertance defined by acceleration X   , where each is in relation to the input excitation forces F. In this paper, the adopted measurement of the output response is to find system mobility, and this is justified since the frequency range is in the middle range i.e., 10 to 1000 Hz as per ISO 10816. This measurement handling is considered a good practice when dealing with applications such as rotating equipments and internal combustion engine [5].…”

“…The modal analysis results using FEM describe DCR frame system free vibration analysis, where a harmonic sinusoidal force of (10 Newton) was applied to excite this system. The mode shapes corresponding to 6-DOF natural frequencies are shown in Figure (5). The illustration presents DCR engine frame mode shapes at their corresponding frequencies in green line, compared to the original position represented by dashed line.…”

“…Since all modes are participating to a certain degree to determine system response, it can be noticed that frequency response of all mobility outputs is resulted due to this contribution. For better illustration, Table (5) shows a list of frequency values from both modal and FRF analysis.…”