Soft elastohydrodynamic analysis of rotary lip seals

Salant, Richard F.

doi:10.1243/09544062jmes2181

Cited by 22 publications

(16 citation statements)

References 54 publications

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“…This micro mechanism has been the subject of many studies and analyses in the last three decades, the most important of which are the results obtained by Salanta [10]. These studies show that the proper effect of oil pumping depends on two important characteristics of the seal:…”

Section: Dynamic Sealing Mechanismmentioning

confidence: 98%

Diagnostic Model of Crankshaft Seals

Bzura

2019

Polish Maritime Research

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The paper presents a research stand being a diagnostic model of radial lip seals used, among others, on crankshafts of piston combustion engines in order to identify the correctness of their operation. The possibility of determining the technical condition of lip seals on the basis of the proposed coefficient of correctness of operation has been described. The basic features of seals influencing their correctness of operation were also described, along with examples of determining the durability limits of lip seals. A modified version of the friction node of the T-02 four-ball apparatus is presented. It allows to check the correctness of sealing lips operation as well as to test the compatibility between the steel shaft, sealing lip and sealed lubricating oil. It was shown that the test results con-firmed the usefulness of the hypothesis that the quality of oil affects the durability of sealing lips and their coefficient of correctness. Additionally, attention was paid to the possibility of analyzing the pumping effect affecting the transition of the seal-shaft system from the state of partial suitability S2 to the state of full suitability S1 or to the state of unfitness S3, and because the change in the state of such a system is random, it requires a probabilistic analysis.

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Section: Dynamic Sealing Mechanismmentioning

confidence: 98%

Diagnostic Model of Crankshaft Seals

Bzura

2019

Polish Maritime Research

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“…The micro mechanism has been the subject of considerable research and analysis over the past three decades and much of this is summarized by Salant [3]. The basis of the pumping mechanism depends on two important characteristics of the seal: 1.…”

Section: Dynamic Sealing Mechanismmentioning

confidence: 99%

“…It is important on assembly that some of the bearing grease is used to lubricate the seal. The lubrication of such seals by grease has not been thoroughly researched, but it is presumed that during operation some of the oil bleeds from the grease to lubricate the lip [3]. These seals are used in bearings for arrangements where contamination is moderate and the presence of moisture or water spray, etc., cannot be ruled out, or where a long service life without maintenance is required.…”

Section: Sealed Bearingsmentioning

confidence: 99%

“…( ) 3 Theoretically the pressure limit should be very dependent on the eccentricity, but experiments at up to 60% of maximum eccentricity have shown that this is not a major factor up to this value. However, it can be seen that the pressure capability is dependent on the square of the clearance, so it is obviously important to keep this to a minimum.…”

Section: Viscosealsmentioning

confidence: 99%

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Rotary Seals

Flitney¹

2014

Seals and Sealing Handbook

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“…Domestic and foreign scholars [1][2][3][4][5][6][7] had also carried out a large number of theoretical and experimental studies to reveal the micro-woven structure of the axial surface and improve the friction lubrication mechanism between contact surfaces, effectively improving the lubrication performance. Moreover, it was found that the shape, size, pores depth, pores orientation and area ratio of axial surface micro-texture [8][9][10][11][12][13][14] had greatly influenced on the lubrication performance of the oil seal. In addition, the mechanism of the surface micro-modeling to which improve the lubrication state and the sealing performance is very complex, which is not only dependent on its shape and structure, but also has a great relationship with working conditions, and its internal mechanism needs to be further revealed.…”

mentioning

confidence: 99%

Study on Sealing Performance of Oil Seal with Micro-pores Textured in Rotary Shaft Surface

Xiangping¹,

Zhang²,

Lin-ping³

2020

MATEC Web Conf.

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In order to improve the reliability and the long life cycle of the lip seals, comprehensive consideration of the liquid film cavitation and JFO mass conservation boundary conditions, the geometry model of the oil seal with micro-diamonds textured on the shaft surface is given, and its mathematical model is built, the relevant numerical calculation method is used, eventually that the film pressure distribution and the micro diamond pores structure parameters effect on the seal performance are obtained under the different operating conditions. The results showed that the dynamic pressure effect caused by the diamond pores can make the oil film pressure field between the axial surface and the lip produced regular axial and radial wave change. At the same time, the change of working conditions strengthen or weaken the change law of the oil film pressure field, so which make the reliability of the liquid pressure, lubricating property and pump suction effect also change accordingly. The size, shape and pores direction of the micro-diamonds texture have great influence on the oil seal performance and lubrication characteristics, which can help to reduce the leakage rate, control the pump suction direction, stable the liquid pressure and reduce the friction. In order to improve the stability of the liquid film and pump suction effect, reduce the leakage rate, friction and wear, the axial surface micro-diamond pores texture of which the cone width ratio is 0.4-0.6, the pores depth is 1.5-4.5μm and the tilt angle is 40°-50° shall be selected for the oil seals.

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Soft elastohydrodynamic analysis of rotary lip seals

Cited by 22 publications

References 54 publications

Diagnostic Model of Crankshaft Seals

Diagnostic Model of Crankshaft Seals

Rotary Seals

Study on Sealing Performance of Oil Seal with Micro-pores Textured in Rotary Shaft Surface

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