Experimental testing on the influence of shaft rotary lip seal misalignment for a marine hydro-kinetic turbine

Hand, Brian; Erdoğan, Nuh; Murray, Dennis; Cronin, Patrick; Doran, John; Murphy, Jimmy

doi:10.1016/j.seta.2021.101874

Cited by 10 publications

(4 citation statements)

References 17 publications

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“…Shafting misalignment means that the rotating axes of adjacent rotors are not collinear, such as plane misalignment and spatial misalignment. Misalignment results in bending-torsional coupled vibration of shafting, and the vibration presents nonlinear characteristics [32,33,34,35]. Fig.…”

Section: Misalignment Of Transmission Shaftmentioning

confidence: 99%

Numerical model and coupled vibration analysis of transmission shaft with spatial angle misalignment

Zhang,

Su,

Zang

2024

Preprint

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Vibration control is the key to development of high-speed and light-weight transmission system. There are many factors affecting the vibration, and the influence of misalignment is the most obvious. Therefore, it is important to understand the dynamic response of transmission shaft with misalignment. In previous studies, researchers studied the influence of plane angle misalignment. However, there are few researches on the effect of spatial misalignment on shafting vibration. In this paper, a numerical model of shafting with spatial misalignment is established. The influence of plane angle misalignment and spatial angle misalignment on the vibration is studied. The numerical and experimental results show that the vibration of shafting with spatial angle misalignment is bending-torsional coupled vibration, and the two kinds of vibration reinforce each other, and the torsional vibration is the main vibration. Compared with the influence of plane angle misalignment, the influence of spatial angle misalignment is more obvious..

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Section: Misalignment Of Transmission Shaftmentioning

confidence: 99%

Numerical model and coupled vibration analysis of transmission shaft with spatial angle misalignment

Zhang,

Su,

Zang

2024

Preprint

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“…At present, the research on rotary lip seals considering eccentricity is mainly based on experiments. Sinzara et al (2018) investigated the effects of different eccentricity, rotational speed and overload on the sealing performance of lip seals through radial eccentricity experiments; Ishiwata and Hirano (1964 ) , Prati (1984 ) and Schuck and Muller (1981) analysed the causes of sealing failure of lip seals under the eccentricity condition through experiments; Pinedo et al (2017) and Hand et al (2022) investigated the effects of eccentricity on the wear failure of lip seals; The smaller the diameter of the shaft, the greater the impact of eccentricity. A mere 0.2 mm of eccentricity can result in an extremely irregular distribution of contact pressure in seals, where the maximum contact force may even be three times that of the minimum contact force, leading to situations where the contact force is too low and detachment occurs.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation study of high-speed lip seal considering eccentricity

Tan,

Li,

Zhou

et al. 2024

ILT

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Purpose This paper aims to focus on the high-speed rotary lip seal in aircraft engines, combining its service parameters, its own structure and application conditions, to study the influence of different eccentric forms, eccentricity, rotational speed and other factors on the performance of the rotary lip seal. Design/methodology/approach A numerical simulation model for high-speed eccentric rotary lip seals has been developed based on the theory of elastic hydrodynamic lubrication. This model comprehensively considers the coupling of multiple physical fields, including interface hydrodynamics, macroscopic solid mechanics and surface microscopic contact mechanics, under the operating conditions of rotary lip seals. The model takes into account eccentricity and uses the hazardous cross-sectional method to quantitatively predict sealing performance parameters, such as leakage rate and friction force. Findings Eccentricity has a large impact on lip seal performance; lips are more susceptible to wear failure under static eccentricity and to leakage failure under dynamic eccentricity. Originality/value This study provides a new idea for the design of rotary lip seal considering eccentricity, which is of guiding significance for the engineering application of rotary lip seal.

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“…This is expected to have a 337 GW installation capacity by 2050 [2]. Despite these advancements, the diversity of ocean energy devices, particularly wave energy converters, lacks a standardized design, hindering their widespread adoption compared to other renewable technologies like wind energy [4]. Realizing the full potential of ocean energy requires optimizing capacity factors and enhancing the entire life cycle of processes, with a strategic focus on reducing the high levelized cost of electricity through reliable and flexible wave renewable energy devices [5,6].…”

Section: Introductionmentioning

confidence: 99%

An integrated methodology for significant wave height forecasting based on multi‐strategy random weighted grey wolf optimizer with swarm intelligence

Dokur,

Erdogan,

Salari

et al. 2024

IET Renewable Power Gen

Self Cite

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While wave energy is regarded as one of the prominent renewable energy resources to diversify global low‐carbon generation capacity, operational reliability is the main impediment to the wide deployment of the related technology. Current experience in wave energy systems demonstrates that operation and maintenance costs are dominant in their cost structure due to unplanned maintenance resulting in energy production loss. Accurate and high performance simulation forecasting tools are required to improve the efficiency and safety of wave converters. This paper proposes a new methodology for significant wave height forecasting. It is based on incorporating swarm decomposition (SWD) and multi‐strategy random weighted grey wolf optimizer (MsRwGWO) into a multi‐layer perceptron (MLP) forecasting model. This approach takes advantage of the SWD approach to generate more stable, stationary, and regular patterns of the original signal, while the MsRwGWO optimizes the MLP model parameters efficiently. As such, forecasting accuracy has improved. Real wave datasets from three buoys in the North Atlantic Sea are used to test and validate the forecasting performance of the proposed model. Furthermore, the performance is evaluated through a comparison analysis against deep‐learning based state‐of‐the‐art forecasting models. The results show that the proposed approach significantly enhances the model's accuracy.

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Experimental testing on the influence of shaft rotary lip seal misalignment for a marine hydro-kinetic turbine

Cited by 10 publications

References 17 publications

Numerical model and coupled vibration analysis of transmission shaft with spatial angle misalignment

Numerical model and coupled vibration analysis of transmission shaft with spatial angle misalignment

Numerical simulation study of high-speed lip seal considering eccentricity

An integrated methodology for significant wave height forecasting based on multi‐strategy random weighted grey wolf optimizer with swarm intelligence

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