Vibroacoustic Measurements and Simulations Applied to External Gear Pumps. An Integrated Simplified Approach

Carletti, Eleonora; Miccoli, G.; Pedrielli, Francesca; Parise, Giorgio

doi:10.1515/aoa-2016-0028

Cited by 17 publications

(12 citation statements)

References 15 publications

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“…According to equation ( 16), l opt = 71,750 is obtained, corresponding to a 0 = 205. In this article, a 0 = 300 is satisfied with the condition of equation (9).…”

Section: Determining the Optimal Length Of Each Segmentmentioning

confidence: 99%

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Fault diagnosis of synchronous hydraulic motor based on acoustic signals

Hou

Sun

et al. 2020

Advances in Mechanical Engineering

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Synchronous hydraulic motors are used in high load conditions. Therefore, the failure of such motors must be promptly detected to avoid severe accidents and economic loss. The automation of signal processing and diagnostic processes in practical engineering applications can help improve engineering efficiency and reduce hazards. As a non-contact acquisition signal, an acoustic signal has easier acquisition than a vibration signal. This article proposes an automatic fault detection method for synchronous hydraulic motors, which uses acoustic signals. The proposed method includes the automatic calculation and pattern recognition of the parameters of fault feature vectors. The automatic calculation of the fault feature vector is based on the combination of wavelet packet energy and the Pearson correlation coefficient. Then, the nearest-neighbor classifier is used for fault diagnosis. This study verifies that the proposed method can effectively identify the normal state, gear wear, gear rust, and barrier block wear. This method provides a solution for the automatic fault diagnosis of synchronous hydraulic motors and other types of quasi-period rotating machinery.

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“…According to equation ( 16), l opt = 71,750 is obtained, corresponding to a 0 = 205. In this article, a 0 = 300 is satisfied with the condition of equation (9).…”

Section: Determining the Optimal Length Of Each Segmentmentioning

confidence: 99%

“…The acoustic sensors are low cost and non-contact; their signals can be collected instantly, and they do not affect the normal operation of the equipment. 3,5,9 Therefore, scholars should formulate an effective and feasible method on the basis of acoustic signals for diagnosing synchronous hydraulic motor faults.…”

Section: Introductionmentioning

confidence: 99%

Fault diagnosis of synchronous hydraulic motor based on acoustic signals

Hou

Sun

et al. 2020

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…Nowadays, rising demands for improved vehicle acoustics and lower noise emissions of other components, lead to the fact that often the pump is dominant in the acoustic characteristic of hydraulic systems [3][4][5][6][7][8]. There are different ways to enhance the acoustic characteristics of a pump.…”

Section: Introductionmentioning

confidence: 99%

A Combined CFD-FEM Approach to Predict Fluid-Borne Vibrations and Noise Radiation of a Rotary Vane Pump

2021

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The rising demand for lower noise emissions of car ancillary units due to electrification and higher customer expectations regarding driving comfort results in the need for more silent car components. Hydraulic driven car components in particular are often identified as a major source of noise in the system. Therefore, it is mandatory to investigate the noise sources inside the hydraulic system. In this work, a combined CFD-FEM approach is applied to estimate the flow-induced noise radiation of a mechanically driven transmission pump. To achieve this goal, the mapping procedure to hand over the pressure field from the CFD to the FEM mesh must be valid. For this purpose, the error during the mapping process is evaluated and different parameters, which influence the mapping results, are analyzed. Additionally, the impact of the time step size and the length of the time signal on the frequency resolution of the force signal is investigated to get an appropriate excitation force for the vibroacoustic simulation. Subsequently, a force analysis and a structural FEM simulation are performed to identify which flow phenomenon contributes most to the excitation of the pump housing. Specific locations in the pump with high loads are pointed out. In a final step, the results of the vibroacoustic model are compared to acceleration and sound pressure level measurements of the pump performed in a hemi-anechoic room.

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“…Tang et al predicted the pump noise based on the combined computational fluid dynamics (CFD) method and the Lighthill's acoustic analogy (LAA) algorithm, but they only considered the low delivery pressure cases below 3.3 bar [24]. There has been also the numerical-experimental integrated approach that receives the experimentally measured acceleration as an input and calculates the sound field using combined finite element method (FEM) and boundary element method (BEM) [25,26]. Although their approach is simple and useful at the industrial level, preliminary experimental measurements are always required to predict the noise emissions of the pump.…”

Section: Introductionmentioning

confidence: 99%

Modeling Noise Sources and Propagation in External Gear Pumps

et al. 2017

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As a key component in power transfer, positive displacement machines often represent the major source of noise in hydraulic systems. Thus, investigation into the sources of noise and discovering strategies to reduce noise is a key part of improving the performance of current hydraulic systems, as well as applying fluid power systems to a wider range of applications. The present work aims at developing modeling techniques on the topic of noise generation caused by external gear pumps for high pressure applications, which can be useful and effective in investigating the interaction between noise sources and radiated noise and establishing the design guide for a quiet pump. In particular, this study classifies the internal noise sources into four types of effective load functions and, in the proposed model, these load functions are applied to the corresponding areas of the pump case in a realistic way. Vibration and sound radiation can then be predicted using a combined finite element and boundary element vibro-acoustic model. The radiated sound power and sound pressure for the different operating conditions are presented as the main outcomes of the acoustic model. The noise prediction was validated through comparison with the experimentally measured sound power levels.

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Vibroacoustic Measurements and Simulations Applied to External Gear Pumps. An Integrated Simplified Approach

Cited by 17 publications

References 15 publications

Fault diagnosis of synchronous hydraulic motor based on acoustic signals

Fault diagnosis of synchronous hydraulic motor based on acoustic signals

A Combined CFD-FEM Approach to Predict Fluid-Borne Vibrations and Noise Radiation of a Rotary Vane Pump

Modeling Noise Sources and Propagation in External Gear Pumps

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