Study of leakage and friction of flexible seals for steady motion via a numerical approximation method

Nikas, George K.; Sayles, R.S.

doi:10.1016/j.triboint.2005.09.003

Cited by 63 publications

(81 citation statements)

References 23 publications

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“…An and Sepehri [28] presented the application of extended Kalman filter (EKF) towards leakage fault identification in a servo-hydraulic actuation system. Nikas and Sayles [29] has developed a steady-state, smooth-surface elastohydrodynamic problem of flexible (polymeric or elastomeric) seals of nominally rectangular or toroidal shape, most commonly found in the linear and the rotary hydraulic actuators for reciprocating motion. Shi et al [30] proposed a practical approach to combine model-based fault detection with an adaptive threshold.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modelling and fuzzy logic based position control of an electrohydraulic servosystem with internal leakage

Kalyoncu¹,

Haydim²

2009

Mechatronics

100

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Section: Introductionmentioning

confidence: 99%

Mathematical modelling and fuzzy logic based position control of an electrohydraulic servosystem with internal leakage

Kalyoncu¹,

Haydim²

2009

Mechatronics

100

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“…As already pointed out by Kanters et al [7] and Nikas [11], the pressure field computed directly from the structure model does not give a realistic approximation of the hydrodynamic pressure in the inlet zone. This is due to the pressure generation in the gap preceding the contact area.…”

Section: Implementation Of the Ihl Methodsmentioning

confidence: 96%

Numerical modelling of hydraulic seals by inverse lubrication theory

Fatu

Hajjam

2011

Proceedings of the Institution of Mechanical Engineers, Part J:

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This article describes a methodology used to achieve a numerical analysis of hydraulic seals by the inverse hydrodynamic lubrication method. The main novelties consist of taking into account the influence of the shear stresses in the lubricant film and in the treatment of hydrodynamic effects on the seal inlet. Each step is detailed and discussed in terms of possible error over the predicted seal performances. It has been shown that the pressure field computed directly from the structure model does not give a realistic approximation of the hydrodynamic pressure in the inlet zone, and a hydrodynamic correction is necessary. Furthermore, it has been shown that if the tangential friction due to the shear stress in the lubricant film is not taken into account, error of about 5 per cent can be made, concerning the predictions of leakage and friction force.

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“…However, leakage is a serious potential problem in hydraulic systems. As one of the most important indexes to evaluate the sealing performance, leakage depends on many factors, such as the seal material, operating temperature, driving pressure, seal compression and seal geometry [5] . Therefore, effects of these factors on the behaviour of the seal should be thoroughly understood and the leakage rate is reasonably determined, which is the primary mission of the seal design.…”

Section: Methodsmentioning

confidence: 99%

Optimization of Hydraulic Oil Seal in Earth Movers

2016

IJSR

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This project aims at increasing the durability of the oil seal used in earth movers considering the design and material of the oil seal being unchanged. We increase the heat dissipation of the oil seal by providing coating on the frontal surface of the oil seal thus enhancing the heat flow from the oil seal to the environment. The enhanced heat transfer in the oil seal enables earth movers to work for longer duration at elevated temperatures. From the availability of more materials/ powders like super alloy powders, power blend powders, thermal spray powders, chemical clad powders, aluminium, nickel, chromium, molybdenum, titanium, vanadium, tungsten etc., for coating the oil seal, the aluminium is being selected with respect to the availability, cost and also its heat dissipation capacity to the oil seal. Thus with the increase in the heat dissipation of the oil seal, the durability also increases with respect to it. The oil seal is examined for the improvement in heat dissipation and since the corrosion determines the life of the aluminium coating on the oil seal, we examine for the corrosive resistance.

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Study of leakage and friction of flexible seals for steady motion via a numerical approximation method

Cited by 63 publications

References 23 publications

Mathematical modelling and fuzzy logic based position control of an electrohydraulic servosystem with internal leakage

Mathematical modelling and fuzzy logic based position control of an electrohydraulic servosystem with internal leakage

Numerical modelling of hydraulic seals by inverse lubrication theory

Optimization of Hydraulic Oil Seal in Earth Movers

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