Modeling of Rigidly Mounted PTFE Face Seals Subject to Small Strain Harmonic Vibrations

Tan, Bo; Stephens, Lyndon Scott

doi:10.1007/s11249-022-01652-w

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…Even at room temperature, PTFE can show large deformations over a long period with the continuous application of force. Additionally, it hardly presents any resilience 61 . Therefore, a PTFE layer or a PTFE transfer layer forms on wear tracks and the sliding steel when sliding over time with a continuous load, and PTFE displays a creep behavior.…”

Section: Resultsmentioning

confidence: 99%

Multi‐featured epoxy composites filled with surface‐modified PTFE powders treated by Na‐naphthalenide system

Akin,

Çakir,

Demirer

2023

J of Applied Polymer Sci

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This study aimed to produce new multi‐featured epoxy composites that are advanced in terms of mechanical properties, wear and impact resistance, and glass transition and heat deflection temperatures. Epoxy composites filled with chemically surface‐treated poly (tetrafluoroethylene) (PTFE) powders at various ratios were prepared to obtain these improved properties. The chemical treatment was carried out via a Na‐naphthalenide system. After this treatment, the x‐ray photoelectron spectroscopy results presented the existence of functional groups such as OH, carbonyl groups, and CC unsaturation points on the surface of the PTFE powders. On the PTFE surfaces, while the atomic ratios of carbon and oxygen were substantially increased, the fluorine ratio presented a significant decrease after the chemical treatment. However, the wear rates of the novel composites were highly advanced despite this large decrease in the fluorine ratio on the surface of the PTFE powders. Moreover, functional groups such as OH, carbonyl groups, and CC unsaturation points and spongelike or network structures on the PTFE surfaces provided the opportunity to obtain strong adhesion and interfacial bonding between the surface‐modified PTFE powders and the matrix. Strength and modulus values showed substantial enhancement besides the IZOD impact resistance. All glass transition and heat deflection temperatures were also substantially improved.

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Section: Resultsmentioning

confidence: 99%

Multi‐featured epoxy composites filled with surface‐modified PTFE powders treated by Na‐naphthalenide system

Akin,

Çakir,

Demirer

2023

J of Applied Polymer Sci

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“…Thatte and Salant (2012) similarly underscored the impact of rubber material's viscoelasticity on the deformation pattern of the seal. Tan and Stephens (2022) emphasized that the viscoelastic nature of the rubber material governs its recovery capability and resistance, thereby affecting the compression state of the seal. Evidently, the viscoelastic properties of the rubber material wield significant influence on the radial motion of the oil seal lip.…”

Section: Introductionmentioning

confidence: 99%

The lip motion trajectory of eccentric oil seal considering material viscoelasticity

Zhai,

Li,

Xing

2023

ILT

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Purpose This paper aims to study the motion trajectory of the oil seal for shaft in eccentric state and derive equation of lip motion trajectory. Design/methodology/approach This paper analyzes the force during the motion of the eccentric lip by considering the material viscoelasticity, and a cam-plate mechanism is established as an equivalent model for the motion between the shaft and the lip; according to this, the equation of lip motion trajectory is derived. Findings The trajectory of the lip lags that of the shaft in the eccentric state because the viscoelasticity-affected lip recovery velocity is lower than the shaft recovery speed. The lip trajectory enters the lag phase earlier and the lag phase’s duration is longer with the increase of the eccentricity and rotational speed, because the deviation of the recovery velocities between the lip and the shaft will be exacerbated. Originality/value Innovatively, by considering the viscoelasticity of the material, the cam-plate mechanism is used to equivalent the motion of the shaft-lip to derive the equation for the radial motion trajectory of the eccentric lip. The regularity of lip motion is the key to determining the performance of oil seals, and the eccentric lip trajectory research method revealed in this paper provides a research basis for the performance research and optimization of eccentric oil seals. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-06-2023-0161/

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Analytical method for contact characteristics of rubber shaft seals under dynamic eccentricity considering viscous effect

Xing,

Zhai,

et al. 2024

Tribology International

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Modeling of Rigidly Mounted PTFE Face Seals Subject to Small Strain Harmonic Vibrations

Cited by 6 publications

References 24 publications

Multi‐featured epoxy composites filled with surface‐modified PTFE powders treated by Na‐naphthalenide system

Multi‐featured epoxy composites filled with surface‐modified PTFE powders treated by Na‐naphthalenide system

The lip motion trajectory of eccentric oil seal considering material viscoelasticity

Analytical method for contact characteristics of rubber shaft seals under dynamic eccentricity considering viscous effect

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