Effect of Bearing Housings on Centrifugal Pump Rotor Dynamics

Yashchenko, Andrii; Rudenko, A. A.; Simonovskiy, V.; Kozlov, O M

doi:10.1088/1757-899x/233/1/012054

Cited by 10 publications

(4 citation statements)

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“…От скорости потока жидкости в зазоре w зависит также величина расхода через уплотнение Q. , а также совершают радиальные и угловые колебания. Оценка силовых характеристик для ламинарных и турбулентных режимов течения с учетом местных сопротивлений и с учетом закрутки потока на входе в зазор была проведена в [11].…”

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Модель И Расчет Гидромеханической Системы Ротор – Щелевые Уплотнения

Shevchenko¹

2020

ПОММК

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Построены модель гидромеханической системы ротор – щелевые уплотнения, модели однодисковых роторов, расчётная схема щелевого уплотнения с подвижной втулкой. Получены аналитические зависимости для расчета динамических характеристик гидромеханической системы, описывающие радиально - угловые колебания ротора центробежной машины в щелевых уплотнениях. Получены выражения для построения амплитудных и фазовых частотных характеристик

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“…Подобным образом вычисляются дополнительные моменты других составляющих радиальной силы, обусловленные различием обобщен-ных координат, скоростей и ускорений (11)…”

Section: а бunclassified

Модель И Расчет Гидромеханической Системы Ротор – Щелевые Уплотнения

Shevchenko¹

2020

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“…The research work [2] is devoted to methods of research of dynamics of a rotor on ball bearings with the combined application of spatial and beam settlement models. In the research work [3], the influence of different classes of bearings on vibrations is considered.…”

Section: Literature Reviewmentioning

confidence: 99%

Ensuring the Vibration Reliability of Rotors Connected by Spline Joints

Verbovyi

Neamțu

Sieryk

et al. 2019

JES

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This article is devoted to the development of refined numerical mathematical models of rotor dynamics of high-performance turbomachines having a spline connection. These models consider the dependence of the critical frequencies of the shaft on the angular stiffness of the spline connection, as well as the procedure of virtual balancing. As a result of the complex application of this approach, the methods of calculation of vibration characteristics taking into ac-count variable values of angular rigidity of splined connection are offered. In addition, the method of evaluating the system of initial imbalances with the corresponding displacements of the rotor axis in the correction and calculation sections has also been improved. The proposed approaches, based on the integrated application of CAE software and computational intelligent systems, allow for modal and harmonic analysis and implement virtual balancing with a significant reduction in preparation and machine time without loss of relative accuracy. In addition, the developed mathematical model of free and forced vibrations of rotor systems have been implemented in the program code operational files “Critical Frequencies of the Rotor” and “Forced Oscillations of the Rotor” of the computer algebra system MathCAD that allows improving the dynamic balancing procedure for evaluating primary imbalances. The high accuracy of the proposed approach is confirmed by checking the dynamic deviations of the rotor axis by the system of residual imbalances in accordance with the standards of vibration stability. Keywords: turbomachine, spline connection, angular stiffness, virtual balancing, modal analysis, harmonic analysis.

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“…When designing non-contact seals on which high pressure is throttled, in addition to sealing, a very important function is to provide vibration characteristics [45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Methodology of Designing Sealing Systems for Highly Loaded Rotary Machines

Шевченко

Radchenko

et al. 2022

Sustainability

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Higher parameters of centrifugal machines are constantly required, such as the pressure of the medium to be sealed and the speed of rotation of the shaft. However, as the parameters increase, it becomes more and more difficult to ensure the effectiveness of sealing. In addition, sealing systems affect the overall safety of equipment operation, especially vibration. In order to harmonize the sealing functions and increase the dynamic rigidity of the rotors of centrifugal machines, a method for modeling complex sealing systems has been developed. Non-contact seals are considered as hydrostatic–dynamic bearings that can effectively dampen rotor oscillations. A general approach to the analysis of non-contact seals as automatic control systems and an algorithm for constructing their dynamic characteristics at the design stage were proposed for the first time. Models of “rotor-gap seal”, impulse seal and “rotor–hydraulic face” systems, and seal-supports of a shaftless pump have been studied to assess the effect of these seal systems on the oscillatory characteristics of the rotor. Analytical dependencies are obtained for calculating the dynamic characteristics and stability limits of seals as hydromechanical systems. The directions for improving the safety of operation of critical pumping equipment due to a targeted increase in the rigidity of non-contact seals are determined, which leads to an increase in the vibration resistance of the rotor and the environ-mental safety of centrifugal machines. The paper proposes a method for designing sealing systems based on the configuration of sealing components in order to achieve harmonization between sealing and vibration reliability, taking into account oscillatory processes due to hydrodynamic sealing characteristics.

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Effect of Bearing Housings on Centrifugal Pump Rotor Dynamics

Cited by 10 publications

References 0 publications

Модель И Расчет Гидромеханической Системы Ротор – Щелевые Уплотнения

Модель И Расчет Гидромеханической Системы Ротор – Щелевые Уплотнения

Ensuring the Vibration Reliability of Rotors Connected by Spline Joints

Methodology of Designing Sealing Systems for Highly Loaded Rotary Machines

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