Influence of Groove Structure Parameters Based on Optimal Mass Transfer Coefficient on Vaporization Characteristics and Sealing Performance of Liquid Film Mechanical Seals

Xu, Xiaodong; Ma, Chenbo; Zhang, Yuyan; Sun, Jinhua; Yu, Qiuping

doi:10.3390/app11198941

Cited by 3 publications

(6 citation statements)

References 12 publications

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“…The groove weir ratio γ is the ratio of θ 1 to the sum of θ 1 and θ 2 . This is shown in Equations ( 3) and (4) [19].…”

Section: Geometric Modelmentioning

confidence: 94%

“…Qiu [28] claimed that when CFD calculates the phase transition problem, the calculation results will become more accurate with the increase in the mass transfer coefficient. In a previous study [29], only the influences of the structural parameters of a spiral-groove mechanical seal on the gas phase volume fraction under different mass transfer coefficients were considered. On this basis, the effects of operating parameters on the gas phase volume fraction with different mass transfer coefficients were considered in this study.…”

Section: Rotating Speed N/rpm 1500mentioning

confidence: 99%

“…It was shown that the average vapor volume fraction is not affected to a large extent by the mesh size. Therefore, the decision was made to use a mesh size of 0.05 as the mesh partition standard to consider the influence of surface mesh size on the calculation cost [29]. From Figure 6a-c, it can be seen that within the given range, the average vapor volume fraction increases with the increase in inlet temperature, and decreases with the increase in rotational speed and pressure difference.…”

Section: Rotating Speed N/rpm 1500mentioning

confidence: 99%

“…It was shown that the average vapor volume fraction is not affected to a large extent by the mesh size. Therefore, the decision was made to use a mesh size of 0.05 as the mesh partition standard to consider the influence of surface mesh size on the calculation cost [29]. The considered case study example exhibits a reliability analysis under certain working conditions.…”

Section: Rotating Speed N/rpm 1500mentioning

confidence: 99%

“…The experimental design specifications are shown in Table 3. In addition, a multiple regression analysis was carried out on the simulation results, and the functional function obtained is shown in Equation (10) [29]. The considered case study example exhibits a reliability analysis under certain working conditions.…”

Section: Rotating Speed N/rpm 1500mentioning

confidence: 99%

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Reliability Evaluation of a Dynamic-Pressure Mechanical Seal Based on Liquid Film Vaporization Phase Transition

Bei,

Xu,

et al. 2024

Coatings

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Aiming at the problem of researching the reliability of dynamic-pressure mechanical seals, this paper proposes a reliability evaluation method for dynamic-pressure mechanical seals based on the Monte Carlo method. Based on the influence of the mass transfer coefficient on vaporization phase transition, a liquid film vaporization model of a hydrodynamic mechanical seal’s end face is established, and the working condition parameters and groove structure parameters are designed using the experimental design method. The vaporization characteristics of the liquid film under various parameters are analyzed, and the functional functions of the vaporization characteristics are obtained by fitting. Combined with the maximum vapor phase volume fraction when the dynamic-pressure mechanical seal changes from the liquid miscible phase to the vapor miscible phase, the limit state equation of the vapor phase volume fraction is obtained. Finally, based on the Monte Carlo simulation method, the sealing reliability under specific groove structure parameters is calculated. Our research shows that this method has practicability and effectiveness for the reliability evaluation of mechanical seals with different working conditions and different groove structures.

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“…The groove weir ratio γ is the ratio of θ 1 to the sum of θ 1 and θ 2 . This is shown in Equations ( 3) and (4) [19].…”

Section: Geometric Modelmentioning

confidence: 94%

Section: Rotating Speed N/rpm 1500mentioning

confidence: 99%

Section: Rotating Speed N/rpm 1500mentioning

confidence: 99%

“…It was shown that the average vapor volume fraction is not affected to a large extent by the mesh size. Therefore, the decision was made to use a mesh size of 0.05 as the mesh partition standard to consider the influence of surface mesh size on the calculation cost [29]. The considered case study example exhibits a reliability analysis under certain working conditions.…”

Section: Rotating Speed N/rpm 1500mentioning

confidence: 99%

Section: Rotating Speed N/rpm 1500mentioning

confidence: 99%

See 3 more Smart Citations

Reliability Evaluation of a Dynamic-Pressure Mechanical Seal Based on Liquid Film Vaporization Phase Transition

Bei,

Xu,

et al. 2024

Coatings

Self Cite

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show abstract

Reliability evaluation of a dynamic pressure mechanical seal based on liquid film vaporization phase transition

Bei

et al. 2023

Preprint

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As a key basic component for leakage prevention in rotating machinery, research on the reliability of mechanical seals has always been the focus of theoretical and practical investigations. A reliability evaluation method for the dynamic pressure mechanical seal based on liquid film vaporization phase transition is proposed. To investigate the affect of the mass transfer coefficient on the vaporization phase transition, a liquid film vaporization model of the hydrodynamic mechanical seal seal face has been established. The working condition parameters and groove structure parameters are selected based on experimental testing. The evaporation characteristics of liquid film under different parameter combinations are analyzed, and as a result, the function of the vaporization characteristics is obtained. The limit state equation of gas phase volume fraction is obtained by using the maximum gas phase volume fraction when the dynamic pressure mechanical seal state changes from liquid phase miscibility to gas phase miscibility. The structural parameters of the groove are sampled based on the Monte Carlo method, and the reliability is calculated using the sampling results and the limit state equation. Finally, the proposed method is used to numerically analyze the reliability of the slot under specific structural parameters.

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Spiral Groove Parametric Study of Solid Particles Deposition Characteristics in Sealing Lubrication Film

Chen

Wei

et al. 2022

Energies

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In order to study the effect of groove parameters on solid particles’ deposition in mechanical face seal lubrication film, a multi-phase flow calculation model for the sealing micro-gap lubricating film was established based on the Laminar model, mixture multi-phase flow model, Zwart–Gerber–Belamri cavitation model, and DPM model in Fluent, and a numerical simulation of the effect of groove parameters is presented. The results show that, with the increase of groove depth, the circumferential sedimentary zone in the dam area decreases or even disappears, and the groove area becomes the main sedimentary part; the particle deposition rate decreases first and then increases with the increase of groove depth and spiral angle. The influence of groove depth on the deposition rate at low speed is more significant than that at high speed. The increase of deposition rate caused by a spiral angle that is too large is greater than that caused by a spiral angle that is too small. The optimal groove depth and spiral angle are around 6 µm and 18°, respectively; when the rotating speed is 1000 rpm, the deposition rate increases obviously with the increase of the groove diameter ratio; meanwhile, when the rotating speed increases to more than 2000 rpm, the deposition rate increases first and then decreases with the increase of the groove diameter ratio. When the groove diameter ratio is about 0.5, the deposition rate is the largest. For example, when the rotating speed is 2000 rpm, the deposition rate of the groove diameter ratio, 0.5, is about 200% higher than that of groove diameter ratio, 0.2. The lower the speed, the more sensitive the deposition rate is to the groove diameter ratio. The sensitivity at 1000 rpm is 14 times that at 5000 rpm. The deposition rate increases with the increase of the groove width ratio. The higher the rotating speed, the smaller the rate of deposition rate increase. However, when the rotating speed is 5000 rpm and the groove width ratio is higher than 0.7, the deposition rate increases sharply.

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Influence of Groove Structure Parameters Based on Optimal Mass Transfer Coefficient on Vaporization Characteristics and Sealing Performance of Liquid Film Mechanical Seals

Cited by 3 publications

References 12 publications

Reliability Evaluation of a Dynamic-Pressure Mechanical Seal Based on Liquid Film Vaporization Phase Transition

Reliability Evaluation of a Dynamic-Pressure Mechanical Seal Based on Liquid Film Vaporization Phase Transition

Reliability evaluation of a dynamic pressure mechanical seal based on liquid film vaporization phase transition

Spiral Groove Parametric Study of Solid Particles Deposition Characteristics in Sealing Lubrication Film

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