Design Improvement of Stuffing Box Seals of Centrifugal Pump Shafts, Based on the Study of the Sealing Mechanism Physical Model

Шевченко, С.С.; Llc, United Productions Atom

doi:10.15407/pmach2020.02.041

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Leakage occurs due to looseness in the packing structure, shaft runout, local thermo-hydraulic effects, and other factors, and decreases with increasing contact pressure. 17 The interface contact pressure depends on several parameters including geometry, material and friction. 18 The mechanical behavior of a packing seal is characterized by the transmission ratio of the radial stress over the axial stress, known as the lateral pressure coefficient, which is one of the required parameters used to select packing seals.…”

Section: Introductionmentioning

confidence: 99%

“…For dynamic seals, however, metal-to-metal seal structures are generally more complex, typically consisting of a static ring and a dynamic ring, and rubber parts are still commonly used as auxiliary seals. Seal components made of flexible graphite materials are usually in the form of stuffing with flat or wedge-shaped rings, 17,22 and the sealing structure is relatively simple. Commonly, multi-stage seals are used, which also need to be pressed during installation, and the pressure needs to be maintained during working.…”

Section: Introductionmentioning

confidence: 99%

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High pressure sealing characteristics of combined structure based on flexible graphite rings

Zhao

Zhang

2023

Advances in Mechanical Engineering

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Seal components made of flexible graphite have excellent resistance to temperature, while sealing of high pressure fluids is unsatisfactory. The sealing behavior of flexible graphite rings is characterized by the ratio of the contact pressure to the axial pressure. The FEA results show that the lateral pressure decreases roughly linearly along the direction of the sealing path, and the lateral pressure coefficient increases with increasing axial pressure. We design a combined seal structure based on flexible graphite rings, and extract the contact pressure along two sealing paths. The results imply that the self-sealing effect is more favorable when the pressure of the sealing fluid is increased. The effect of the friction coefficient on the contact pressure is not significant, except at the beginning of the sealing path. Sealing effects are tested under the coupling condition of 350°C and 50 MPa, which verify the sealing performance under high temperature and high pressure. The comparison of the test results of “ kf” (the product of lateral pressure coefficient and friction coefficient) with those of the FEA validates the rationality of the analytical approach. The comprehensive coefficient “ kf” can be easily obtained by testing, and can be used as a key parameter for seal design.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High pressure sealing characteristics of combined structure based on flexible graphite rings

Zhao

Zhang

2023

Advances in Mechanical Engineering

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Method for completing the parts connections of the shaft-seal

Leonov,

Shkaruba,

Nesterkin

et al. 2024

Proceedings of the v International Scientific Conference on Advanced Technologies in Aerospace, Mechanical and Automation Engin

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Sealing systems and dynamics of centrifugal machines

Шевченко¹

2022

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The basics of sealing and its connection with the dynamics of centrifugal machines are described. Modeling, calculation and construction of packing and mechanical seals are presented. Designs, models and calculation methods of non-contact seals, as well as analysis of their infl uence on the vibration state of centrifugal machine rotors, are considered. Directions for improving seals are proposed. The general principles of the construction of complex sealing systems are presented.

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Design Improvement of Stuffing Box Seals of Centrifugal Pump Shafts, Based on the Study of the Sealing Mechanism Physical Model

Cited by 3 publications

References 2 publications

High pressure sealing characteristics of combined structure based on flexible graphite rings

High pressure sealing characteristics of combined structure based on flexible graphite rings

Method for completing the parts connections of the shaft-seal

Sealing systems and dynamics of centrifugal machines

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