Diagnostics, maintenance and regeneration of torsional vibration dampers for crankshafts of ship diesel engines

Homik, Wojciech

doi:10.2478/v10012-010-0007-2

Cited by 21 publications

(32 citation statements)

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“…Cases are well-known in which improper use of the damper has resulted in remarkable increase of the oil viscosity and change of the oil aggregation state (Fig. 13) [9,10] Oil viscosity changes cannot be neglected at the stage of selection (designing) of the viscotic damper for a certain power transmission unit [11]. When selecting the damper, calculations are performed to determine an optimal liquid viscosity, i.e.…”

Section: Fig 12 Kinematic Viscosity Logarithm Vs Shear Velocity Lomentioning

confidence: 99%

The effect of liquid temperature and viscosity on the amplitude-frequency characteristics of a viscotic torsion damper

Homik¹

2012

Polish Maritime Research

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The article discusses causes of the appearance of transverse, longitudinal and torsional crankshaft vibrations in multi-cylinder internal combustion engines. Particular attention is paid to the torsional vibration which is the most severe threat to engine crankshafts. Damping methods making use of torsion dampers are presented. With the reference to viscotic dampers, problems with their damping efficiency are discussed in the context of viscosity changes of the damping liquid. The article also presents the amplitude-frequency characteristics of a series of viscotic dampers, which were recorded experimentally on the research rig and on a real object. An idea of vibration damper metric is given.

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Section: Fig 12 Kinematic Viscosity Logarithm Vs Shear Velocity Lomentioning

confidence: 99%

The effect of liquid temperature and viscosity on the amplitude-frequency characteristics of a viscotic torsion damper

Homik¹

2012

Polish Maritime Research

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“…During the operation of the crankshaft, it undergoes various type of vibration such as torsional, flexural, axial and couple [13,14]. There is different type of the crankshafts had designed and developed using various type of the CAD software such as PRO-E, CATIA-V5 or SolidWorks before conducting the analysis of the crankshaft model in ANSYS [14][15][16][17]. Most of the analysis determined that at the center of the crankshaft, it is under maximum stress and deformation located at the center of the crankpin and fillet area [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Study on Failure Analysis of Crankshaft Using Finite Element Analysis

Ang

2021

MATEC Web Conf.

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Crankshaft is one of the crucial parts for the internal combustion engine which required effective and precise working. In this study, the aim of the study is to identify the stress state in the crankshaft and to explain the failure in automotive crankshaft and fatigue life of crankshaft by using finite element analysis. The 3D solid modelling of the crankshaft model was designed and developed using SolidWorks. A static structural and dynamic analysis on an L-twin cylinder crankshaft were used to determine the maximum equivalent stress and total deformation at critical locations of the crankshaft. The model was tested under dynamic loading conditions to determine fatigue life, safety factor, equivalent alternating stress and damage using the fatigue tool. The results obtained from this study indicated that the crankshaft has obvious fatigue crack which was belongs to fatigue fracture. The fatigue fracture developed was only attributed to the propagating and initiate cracks on the edges of the lubrication hole under cyclic bending and torsion. Overall, the crankshaft is safe for both static and fatigue loadings. In dynamic analysis, the critical frequency obtained in the frequency response curve should be avoided which it may cause failure of the crankshaft.

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“…The continuous development of internal combustion engine to high speed and high power makes the torsional vibration of crane transmission system more intense, and it also causes accidents such as shaft breaking, elastic coupling failure and force transmission bolt failure [19,20]. In order to better understand the torsional vibration characteristics of crane transmission system, system matrix method [21] and finite element method are widely used [22,23]. Because of the complex structure, multiple excitation sources and operation conditions, the mechanism of vibration is complex and needs further study.…”

Section: Introductionmentioning

confidence: 99%

Study on torsional vibration of RT60 crane transmission system

Xiao

Zhou

2020

Mechanics & Industry

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In the process of engineering use, the elastic coupling of the RT60 crane transmission system has a large noise and even breaks down sometimes. In this paper, RT60 crane transmission system is the research object. A finite element model and a discrete model for torsional vibration of transmission system are established by finite element method and lumped parameter method. Through the study of the finite element model and the vibration test of transmission system, the correctness of the system model, equivalent parameter, calculation method and MATLAB program are verified. Because of the high efficiency of the torsional vibration discrete system, the discrete model is used in this paper to replace the finite element model. The free vibration and response vibration of the crane transmission system are calculated and analyzed, and the reasons for the existence of the system noise are explained in the starting stage. Through the study of the vibration theory and the matching method of the elastic coupling, the CX-45-VFA-60-11 elastic coupling is proposed to replace the CX-45-VFA-11 elastic coupling. In this paper, the data signal is collected by the hall gear sensor, and the data are analyzed by the self-developed vibration tester. The vibration amplitude of the torsional vibration of the crane transmission system is greatly reduced by testing the transmission system of the replacement of the elastic coupling. This paper provides a theoretical guiding significance for the low noise design of the crane transmission system.

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Diagnostics, maintenance and regeneration of torsional vibration dampers for crankshafts of ship diesel engines

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Cited by 21 publications

References 0 publications

The effect of liquid temperature and viscosity on the amplitude-frequency characteristics of a viscotic torsion damper

The effect of liquid temperature and viscosity on the amplitude-frequency characteristics of a viscotic torsion damper

Study on Failure Analysis of Crankshaft Using Finite Element Analysis

Study on torsional vibration of RT60 crane transmission system

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