Design Modifications and Thermal Analysis of Visco-Dampers for Extending Silicone Oil Durability

Venczel, Márk; Steidl, Michael; Veress, Árpád

doi:10.12700/aph.18.8.2021.8.2

Cited by 3 publications

(2 citation statements)

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“…Because of these facts, visco-dampers have a significant basis in business and finance that requires continuous product developments and accurate lifetime estimation methods. Many articles deal with the vibration analysis of ICEs [5][6][7], with the thermal analysis [8][9][10] or the calculation of power dissipation and damping coefficient [11][12][13] of visco-dampers. However, there is no study focusing on the possibility of service life extension through filling process analysis and optimization in sufficient detail.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Thermal Neutron Radiography for Filling Process Analysis and CFD Model Validation of Visco-Dampers

et al. 2023

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The visco-damper is a crucial engine accessory from an operation- as well as vehicle-safety point of view. The service life of this damping product is determined by the degradation of the silicone oil applied to it. The thermal and mechanical degradation of the oil starts not at the first operation of the damper, but at the manufacturing stage when the oil is filled into the damper’s gap at high pressure. Finite volume method-based computational fluid dynamic calculations provide an opportunity to optimize the filling process by minimizing the oil degradation. A three-dimensional, transient, non-Newtonian, multiphase, coupled fluid dynamic and heat transfer simulation model was developed to analyse the filling process and to investigate the effect of the slide bearing’s cut-off position on the filling process. Dynamic thermal neutron radiography was employed to visualize the filling of a test damper for model validation from viscous and fluid dynamic aspects. Distinct properties of neutrons compared to the more commonly applied X-rays were proven to be an effective tool for real-time monitoring of the silicone oil’s front propagation in the damper’s gap and for quantifying the characteristics of the filling process. Visual matching and comparison of propagation times and oil front velocity profiles were used to validate the simulation results.

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Section: Introductionmentioning

confidence: 99%

Dynamic Thermal Neutron Radiography for Filling Process Analysis and CFD Model Validation of Visco-Dampers

et al. 2023

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“…Currently, passive vibration dampers, such as silicone oil viscous dampers (Li and Zhang 2020;Venczel et al, 2021a;Venczel et al, 2021b) and rubber dampers (Penkov 2008;Ning et al, 2013;Willenborg and Kroger 2017), are usually adopted to protect the engine camshaft and crankshaft from the possible damage caused by torsional vibrations and help to avoid the barred speed ranges. The vibration energy is converted into heat, which then dissipates from the damper's surface into the ambient air.…”

Section: Introductionmentioning

confidence: 99%

Semi-active control of crankshaft skyhook based on magnetorheological torsional damper

Wang

Ouyang²,

Hu³

et al. 2022

Front. Mater.

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The purpose of this study was to solve the problem that the damping of rubber or silicone oil torsional dampers used in crankshafts is not adjustable and cannot effectively control torsional vibration at different resonant frequencies. Based on the controlled rheological properties of magnetorheological (MR) smart materials, this study designed a new type of variable damping MR torsional damper (MRTD) and proposed a semi-active control method to effectively control the torsional vibration of the crankshaft under multiple harmonic resonances. First, a mechanical model of the MRTD and a lumped parametric mass model of the crankshaft system were developed, and the resonance frequency harmonic range of the crankshaft system operation was determined by the torsional vibration characteristics analysis. Then a semi-active skyhook control method for the MRTD was proposed, and a joint control simulation analysis was performed using Amesim and Matlab software. The torsional vibration control effects of the crankshaft system with no damper, MRTD with different damping coefficients, and MRTD with skyhook control under acceleration and uniform speed conditions were comprehensively investigated. The simulation results indicated that the skyhook damping control significantly reduced the torsional vibration amplitude under both acceleration and uniform speed conditions, verifying the effectiveness of the skyhook-based control strategy for MRTD.

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Considering needs of the temperature dependence of a thermal conductivity coefficient at simulating thermal conduction tasks

Erchegyi

Racz

2022

2022 IEEE 20th Jubilee World Symposium on Applied Machine Intelligence and Informatics (SAMI)

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Design Modifications and Thermal Analysis of Visco-Dampers for Extending Silicone Oil Durability

Cited by 3 publications

References 0 publications

Dynamic Thermal Neutron Radiography for Filling Process Analysis and CFD Model Validation of Visco-Dampers

Dynamic Thermal Neutron Radiography for Filling Process Analysis and CFD Model Validation of Visco-Dampers

Semi-active control of crankshaft skyhook based on magnetorheological torsional damper

Considering needs of the temperature dependence of a thermal conductivity coefficient at simulating thermal conduction tasks

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