Modelling dynamic behaviour and noise generation in gear pumps: Procedure and validation

Mucchi, Emiliano; Rivola, Alessandro; Dalpiaz, Giorgio

doi:10.1016/j.apacoust.2013.10.007

Cited by 43 publications

(29 citation statements)

References 26 publications

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“…Gearboxes are used to transmit the power from the engine or motor to the wheels in automotive Industry [7,15,20,21]. Nevertheless, they are not only used for this specific application but in aeronautic [3], energy [19,22], agricultural sectors [16], among others.…”

mentioning

confidence: 99%

Gear transmission rattle: Assessment of meshing forces under hydrodynamic lubrication

2019

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Noname manuscript No.(will be inserted by the editor) GEAR TRANSMISSION RATTLE: ASSESSMENT OF MESHING FORCES UNDER HYDRODYNAMIC LUBRICATIONA. Fernandez-Del-Rincon · A. Diez-Ibarbia · S. TheodossiadesReceived: date / Accepted: date Abstract The dynamic behavior of gear transmissions poses several challenges from the standpoint of design and requires the availability of more advanced models capable of simulating a wide range of operating conditions. In this paper, several formulations to represent efforts related to the lubricant in gear transmissions subjected to reduced torque levels has been assessed. Under these conditions, the lubrication regime is hydrodynamic and the dynamic behavior of the meshing contacts can happen in different scenarios depending on both the lubricant properties and operating conditions. Such problems are cumbersome in gear transmissions in which acoustic performance is a determining design factor, such as in car applications. In this regard, gear rattle is one of the subjects of concern by powertrain designers. In spite of several authors have approached this phenomena, the most recent interest is focused on the role played by the lubricant. The variety of fundamentals and aims of the developed models in this respect requires a better understanding of the effect taken into account by the different formulations in the accurate modeling of hydrodynamic lubrication in gears subjected to low torques. This is the reason why, in this work, several alternatives currently available in the literature to address the formulation of efforts in hydrodynamic regime was collected and presented. Such formulations were implemented in a transmission model previously developed by the authors which was used to simulate different operating conditions in order to assess the results obtained with each one of the considered formulations.

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mentioning

confidence: 99%

Gear transmission rattle: Assessment of meshing forces under hydrodynamic lubrication

2019

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“…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. A significant contribution was also made by Mucchi et al, who implemented a lumped-parameter model to compute FBN and FEM/BEM model to investigate SBN and ABN [27,28]. Although based on different modeling assumptions particularly related to the determination of the FBN, this latter work is similar to the approach used in this paper.…”

Section: Vibro-acoustic Model Of External Gear Pumpmentioning

confidence: 58%

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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“…In addition, it can be applied to the software and can be widely applied to solving problems in the engineering field for high accuracy and flexibility [10]. Some previous research have been used FEM to evaluate the dynamic characteristics of the rotating system for some applications, such as rotor-shaft system of journal bearings [11], rotor of IPM motor [12], generator rotor of gas turbine [13], gear pump [14], air bearing spindle [15], and screw pump [16]. In this study, the dynamic characteristic of the gas-liquid mixing pump rotor is evaluated using finite element method, in order to determine the existence of a critical speed and safe upper limits of allowable vibration levels.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Shaft System of Micro Bubble Generating Pump

Bahrudin¹,

Sugiarto²

2017

IJMMM

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Abstract-Gas-liquid mixing pump is one type of microbubble generator which is very efficient for mixing gas and liquid directly and dissolve them. However, one of the problems in designing the rotating machinery is the vibration, because the vibration is usually a direct cause of the component damage. In this paper, the dynamic characteristic of shaft system on a micro bubble generating pump was evaluated based on finite element analysis using ANSYS to investigate the stability and the critical speed of the system. Based on the results of evaluation, finite element analysis can predict the vibration modes on the entire segment of the shaft system in accordance with the natural frequencies of the respective modes. However, it did not find any critical speeds below the design rotational velocity of the shaft system. It can be concluded that the shaft system of the gas-liquid mixing pump was still outside the resonance region and the structural design of the shaft system could be operated safely.. Index Terms-Finite element, Campbell diagram, natural frequency, micro bubble, gas-liquid mixing pump.

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Modelling dynamic behaviour and noise generation in gear pumps: Procedure and validation

Cited by 43 publications

References 26 publications

Gear transmission rattle: Assessment of meshing forces under hydrodynamic lubrication

Gear transmission rattle: Assessment of meshing forces under hydrodynamic lubrication

Modeling Noise Sources and Propagation in External Gear Pumps

Dynamic Analysis of Shaft System of Micro Bubble Generating Pump

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