General Approach to Modeling of Non-Contact Seals and Their Effect on the Dynamics of a Centrifugal Machine Rotor-Reference-Cited by-同舟云学术

General Approach to Modeling of Non-Contact Seals and Their Effect on the Dynamics of a Centrifugal Machine Rotor

Published:2022-03-30 Issue:1 Volume:25 Page:32-39
ISSN:2709-2984
Container-title:Journal of Mechanical Engineering
language:
Short-container-title:J. of Mech. Eng.

Author:

Shevchenko Serhii S.^ORCID,

Abstract

There is a constant demand for higher equipment parameters, such as pressure of a sealing medium and shaft rotation speed. However, as the parameters rise it becomes more difficult to ensure hermetization efficiency. Moreover, sealing systems affect the overall operational safety of the equipment, especially vibratory. Non-contact seals are considered as hydrostatodynamic supports that can effectively damp rotor oscillations. Models of an impulse and a groove seals, models of rotor-seals system and rotor-auto-unloading system, model of a shaftless pump are studied to evaluate an effect of these sealing systems on oscillatory characteristics of rotor. Analytical dependencies for computation the dynamic characteristics of impulse seals, hydromechanical systems rotor-seals and rotor-auto-unloading, as well as shaftless pumps are obtained. These dependencies describe the radial-angular vibrations of a centrifugal machine rotor in seals-supports. Equations for computation the amplitude-frequency characteristics are given. The directions of improving the оperational safety of critical pumping equipment by purposefully increasing the rigidity of non-contact seals that leads to higher rotor vibration stability have been determined.

Publisher

National Academy of Sciences of Ukraine (Co. LTD Ukrinformnauka) (Publications)

Reference20 articles.

1. 1. Martsinkovsky, V. A. & Shevchenko, S. S. (2018). Nasosy atomnykh elektrostantsiy: raschet, konstruirovaniye, ekspluatatsiya [Pumps of nuclear power plants: Calculation, design, operation]. Sumy: University Book Publishing House, 472 p. (in Russian).

2. 2. Shevchenko, S. & Chernov, A. (2020). Development of pulse mechanical seal calculation methods on the basis of its physical model construction. Eastern-European Journal of Enterprise Technologies, vol. 3, no. 2 (105), pp. 58-69. https://doi.org/10.15587/1729-4061.2020.206721.

3. 3. Pavlenko, I., Simonovskiy, V. I., & Demianenko, M. M. (2017). Dynamic analysis of centrifugal machines rotors supported on ball bearings by combined application of 3D and beam finite element models. IOP Conference Series: Materials Science and Engineering, vol. 233, paper ID 012053. https://doi.org/10.1088/1757-899X/233/1/012053.

4. 4. Simonovskiy, V. I. (2015). Otsenka koeffitsiyentov matematicheskikh modeley kolebatelnykh system [Evaluation of coefficients of mathematical models for oscillatory systems]. Saarbrücken: ALAP LAMBERT Academic Publishing, 215 p. (in Russian).

5. 5. Pavlenko, I., Simonovskiy, V., Piteľ, J., & Demianenko, M. (2018). Dinamicheskiy analiz rotorov tsentrobezhnykh mashin s kombinirovannym ispolzovaniyem trekhmernykh i dvukhmernykh konechno-elementnykh modeley [Dynamic analysis of centrifugal machines rotors with combined using 3D and 2D finite element models]. Lüdenscheid: RAM-VERLAG, 427 p. (in Russian).

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1. Sealing systems and dynamics of centrifugal machines;2022