Analysis of stability of two-phase flow mechanical seal with spiral groove under high speeds

Jin, Jie; Peng, Xudong; Meng, Xiangkai; Zhao, Wenjing; Jiang, Jinbo

doi:10.1007/s40430-021-02985-8

Cited by 11 publications

(2 citation statements)

References 33 publications

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“…Rouillon and Brunetie`re 30 conducted a series of experimental studies on the performance of spiral groove mechanical end face seals under liquid lubrication conditions. Jin et al 31,32 studied the effects of four kinds of easy vaporization sealing media (liquid hydrogen, liquid oxygen, liquid nitrogen, and water) on the phase change and sealing characteristics of spiral groove mechanical seals, and analyzed the stability of spiral groove mechanical seals at high speeds by introducing a thermohydrodynamic model considering the phase change of fluid flow. However, it is pertinent to note that the vaporization model proposed by earlier researchers predominantly focused on the radial flow of the fluid film.…”

Section: Introductionmentioning

confidence: 99%

Effect of two-phase flow lubrication on sealing performance of spiral groove mechanical seal under high speed and low temperature conditions

Wang,

Lei,

et al. 2024

Advances in Mechanical Engineering

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The function of the turbo-pump shaft within the liquid rocket engine is rendered exceedingly complex due to the operation in an environment characterized by drastically low temperatures, elevated velocities, and high pressures. Given these operational conditions, it is highly plausible that a two-phase flow might form within the liquid film located on the terminal face of the mechanical seal. This liquid-vapor mixture significantly modifies the fluid lubrication pattern across the end faces and poses consequential implications on the overall sealing stability. In this study, the phase change characteristics of the fluid in the seal clearance were investigated based on the Laminar and Mixture multi-phase flow models in a spiral groove mechanical seal. The behaviors of two-phase flow characteristics and phase transition under extreme temperature, rotational speed and pressure with liquid nitrogen media were studied. The sealing performance was quantified through metrics including the leakage rate, opening force, and internal gas phase volume ratio. The findings offered valuable insights into the role of operational conditions in influencing the phase change of the liquid film. Moreover, we discerned and explicated the intricate interconnections between the leakage rate, the opening force, and the phase change behavior of the liquid film.

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Section: Introductionmentioning

confidence: 99%

Effect of two-phase flow lubrication on sealing performance of spiral groove mechanical seal under high speed and low temperature conditions

Wang,

Lei,

et al. 2024

Advances in Mechanical Engineering

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“…Besides, the temperature and stability of a two-phase flow spiral-grooved mechanical seal are investigated at high speed. 34 Due to the micro-clearance of the bearing, contact measurement cannot be used to measure the temperature variation. At present, infrared temperature measurement technology is applied.…”

Section: Introductionmentioning

confidence: 99%

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Yan

Lai

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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Spiral-grooved thrust bearing (SGTB) is one of the important kinds of supporting component in high-speed rotating devices. The high shearing rate of SGTB can produce a large amount of viscous dissipative heat, which causes a temperature rise. Dynamic pressure effect induces pressure variation in the herringbone SGTB (HSGTB). When liquid hydrogen (LH2) is used as a lubricant, cavitation caused by lower pressure and higher temperature can result in lubrication failure. Especially, the cavitation of LH2 is more prone to occur because of its small temperature difference between the triple point and critical point, and the smaller supercooling degree. The influence of thermal properties on the phase transition process of LH2 is more significant. In this paper, the thermal and mechanical performance of three different structures of LH2 lubricated SGTB is compared by considering viscous dissipative heat. Herringbone SGTB is proposed for better performance and feasibility of its application in LH2 lubrication. The static performances of HSGTB such as load capacity, friction torque, cavitation rate, average temperature, and heat flux have been evaluated numerically by introducing the cryogenic cavitation model. The orthogonal sampling method and range analysis are used to optimize the HSGTB structure. Compared with the original HSGTB, cavitation rate and temperature rise are significantly suppressed in the optimized HSGTB. In addition, the load capacity is also improved effectively at high rotational speed, which is expected to be applied to high-speed centrifugal pumps.

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Effect of phase change on sealing performance parameters and surface topography of a spiral groove mechanical seal

Jin

Peng

Meng

et al. 2022

J Braz. Soc. Mech. Sci. Eng.

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Analysis of stability of two-phase flow mechanical seal with spiral groove under high speeds

Cited by 11 publications

References 33 publications

Effect of two-phase flow lubrication on sealing performance of spiral groove mechanical seal under high speed and low temperature conditions

Effect of two-phase flow lubrication on sealing performance of spiral groove mechanical seal under high speed and low temperature conditions

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Effect of phase change on sealing performance parameters and surface topography of a spiral groove mechanical seal

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