A Thermo-Hydrodynamic Analysis of a Mechanical Face Seal

Pascovici, M. D.; Etsion, I.

doi:10.1115/1.2920930

Cited by 59 publications

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“…For water, the relationship between the viscosity and the temperature can be expressed by [7] m m 0.001exp 0.0175 20 .…”

Section: Frictional Heat Fluxmentioning

confidence: 99%

“…Based on the assumption that the heat is conducted by the two rings, the energy equation for the fluid film holds [7] , i.e., …”

Section: Temperature Distribution Equation Of the Fluid Filmmentioning

confidence: 99%

“…Pascovici and Etsion presented a thermo-hydrodynamic analysis for a face-to-face double seal configuration. The non-isothermal characteristic of the fluid-film mechanical face seal was investigated, and a parametric study was performed in order to define the level of approximation made by the isoviscous solution [7] . Brunetiere gave a study to show that the properties of non-contacting liquid face seals depended greatly on thermal effects, and a complex numerical ThermoElastoHydroDynamic model was also given to accurately determine seal temperature [8] .…”

Section: Introductionmentioning

confidence: 99%

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Frictional heat transfer regularity of the fluid film in mechanical seals

Zhou

Chen

et al. 2008

Sci. China Ser. E-Technol. Sci.

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The frictional heat transfer regularity in the mechanical seal system consisting of the rotating ring, the stationary ring, the fluid film in the end faces and the sealed medium was investigated. The primary factors affecting the frictional heat transfer regularity, such as the heat transfer coefficients from the rings to the sealed medium, the frictional heat flux, the frictional heat distribution ratio and so on, were discussed. The equations for calculating the temperature field both in the sealing members and in the fluid film were derived. The coupling analysis of the frictional heat of the fluid film and the thermal deformation of the two end faces of the rings was carried out to obtain the separation angle of the two deformed end faces in consideration of the viscosity change of the fluid film. The results indicate that the frictional heat of the fluid film heavily affects its characteristic and the sealing performance of mechanical seals. The frictional heat changes not only the shape of the gap between the end faces but also the viscosity of the fluid film, and thereupon leads to the increase of the leakage rate. The maximum temperature of the system is at the inner radius of the fluid film, and most of the frictional heat is conducted by the rotating ring. Based on the heat transfer analysis method put forward in this paper, the parameterized design of mechanical seals can be realized to determine the best geometrical parameters and to select the appropriate material of the sealing members. mechanical seal, heat transfer, frictional heat, coupling analysis

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“…For water, the relationship between the viscosity and the temperature can be expressed by [7] m m 0.001exp 0.0175 20 .…”

Section: Frictional Heat Fluxmentioning

confidence: 99%

“…Based on the assumption that the heat is conducted by the two rings, the energy equation for the fluid film holds [7] , i.e., …”

Section: Temperature Distribution Equation Of the Fluid Filmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Frictional heat transfer regularity of the fluid film in mechanical seals

Zhou

Chen

et al. 2008

Sci. China Ser. E-Technol. Sci.

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“…The first studies focused on developing one-dimensional mathematical models to determine the distribution of pressure and temperature in the clearance and heat transfer through the rings (Pascovici and Etsion, 1992). Mathematical models were further developed, as illustrated in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Most have dealt with heat transfer in the structural elements of mechanical seals, especially those directly responsible for the shape of the radial clearance, i.e. the mating rings separated with a fluid film.The first studies focused on developing one-dimensional mathematical models to determine the distribution of pressure and temperature in the clearance and heat transfer through the rings (Pascovici and Etsion, 1992). Mathematical models were further developed, as illustrated in Ref.…”

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confidence: 99%

Heat transfer and thermal deformations in non-contacting face seals

Błasiak

Takosoglu

Łaski

2014

JTST

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The simulations conducted for non-contacting face seals show that performance-related parameters greatly affect the distribution of temperature in the fluid film causing thermal deformations of the sealing rings. The results indicate that the thermal deformations of the rings should be taken into account at the design stage, especially when non-contacting face seals are to be used in high-performance systems. The mathematical model of heat transfer used for the simulations consists of a system of coupled differential equations with partial derivatives, including heat equations and an energy equation with precisely defined boundary conditions. The calculated distributions of temperature were used to determine the values of thermal deformations of the sealing rings.Key words : Mechanical seal, Non-contacting face seal, Heat transfer, Thermal stresses, Thermal deformation IntroductionMechanical seals are crucial elements of most turbomachines, ensuring their high reliability. They are common in pumps, mixers and other industrial equipment. Designed primarily to reduce power loss, they are also responsible for preventing leakage of the fluid to the environment. This can be achieved by maintaining a proper fluid-filled micro-clearance between the mating sealing rings. Seals of this type are called non-contacting face seals.In recent years, there have been many reports presenting experimental results and solutions to advanced mathematical models describing complex processes of heat transfer and thermoelastic deformations in non-contacting face seals. Most have dealt with heat transfer in the structural elements of mechanical seals, especially those directly responsible for the shape of the radial clearance, i.e. the mating rings separated with a fluid film.The first studies focused on developing one-dimensional mathematical models to determine the distribution of pressure and temperature in the clearance and heat transfer through the rings (Pascovici and Etsion, 1992). Mathematical models were further developed, as illustrated in Ref. (Luan and Khonsari, 2009c), and the researchers took into account also the roughness of the mating surfaces. Solutions to the simplified one-dimensional models were used to theoretically analyze heat transfer in non-contacting seals.More advanced thermohydrodynamic and thermoelastohydrodynamic models of non-contacting face seals were presented in Refs. (Tournerie, et al., 2001, Brunetière, et al., 2003a, 2003b. These complex multi-dimensional mathematical models were solved numerically. Then, the investigations dealt with the effect that the clearance geometry, and the properties of the ring materials have on the distribution of temperature in the fluid film and the seal rings.The work by Thomas (Thomas, et al., 2007) contains a numerical solution to a TEHD model of a gas-lubricated non-contacting face seal. The model analyzes the heat transfer between the fluid film and the surfaces limiting the clearance which undergo thermal strains, considerably affecting the geometry of the ...

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Tribology of dust‐stop seals of mixing machines

Fatourehchi

Shahmohamadi

Rahmani

et al. 2022

Lubrication Science

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Dust stop seals are widely used in powder and rubber mixing industries.Design of the sealing system requires a continuous supply of pressurised lubricant, which is not recycled because of the risk of contamination. There is also the potential of large volume leakage of oil due to poor sealing, increasing operational costs and necessitating remedial measures to avoid environmental protection. Furthermore, the seal faces are prone to failure in relatively short periods of time due to reduced gap and lubricant leakage. The paper presents an analytical method and numerical predictions based on Reynolds equation under combined hydrodynamic and hydrostatic conditions with the entrant lubricant through hydraulically loaded feedholes. The validity of these methods is ascertained through comparison with a more complex but timeconsuming solution of Navier-Stokes equations. The numerical predictions allow for determining the prevailing tribological contact conditions and assessing its suitability for evaluating the sealing performance of mixing machinery.

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A Thermo-Hydrodynamic Analysis of a Mechanical Face Seal

Cited by 59 publications

References 0 publications

Frictional heat transfer regularity of the fluid film in mechanical seals

Frictional heat transfer regularity of the fluid film in mechanical seals

Heat transfer and thermal deformations in non-contacting face seals

Tribology of dust‐stop seals of mixing machines

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