The Vibration and Forces Control During the Rotor Rubbing by Application of Magnetically Sensitive Fluids Lubricating the Rotor Bearings

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F21%3A10252147" target="_blank" >RIV/61989100:27230/21:10252147 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27740/21:10252147

Výsledek na webu

<a href="https://link.springer.com/chapter/10.1007/978-3-030-46466-0_17#citeas" target="_blank" >https://link.springer.com/chapter/10.1007/978-3-030-46466-0_17#citeas</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-030-46466-0_17" target="_blank" >10.1007/978-3-030-46466-0_17</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Vibration and Forces Control During the Rotor Rubbing by Application of Magnetically Sensitive Fluids Lubricating the Rotor Bearings

Popis výsledku v původním jazyce

To achieve optimum performance of rotating machines damping in the rotor supports must be adaptable to the current operating speed. This arrived at a proposal of a new design of a coupling element that consists of a hydrodynamic bearing inserted into a controllable squeeze film damper. This paper deals with its effect on the behavior of a flexible rotor during rotor rubbing. Computer simulations were applied to carry out these investigations. The research is focused on minimizing the amplitude of the rotor vibration and magnitude of the force transmitted to the stationary part and of the impact forces induced by the disc collisions with the stationary part. The squeeze film bearing is lubricated by magnetically sensitive oil. The change of magnetic induction in the lubricating layer changes resistance against the oil flow and thus controls the damping force. In the computational model, the rotor is represented by a Jeffcott one. The pressure distribution in the thin oil layers is described by the Reynolds equations. The one related to the magnetically sensitive lubricant has been adapted to bilinear material. The contact stiffness and material damping in the vicinity of the impact point are considered as linear and the friction as of a Coulomb type. The main advantages of the studied technological solution are that the proposed support element makes it possible to reduce the forces transmitted to the stationary part, to reduce amplitude of the rotor vibration, and to utilize all advantages of hydrodynamic bearings. In addition, the control is very simple as the controller can work only in the on/off regime.

Název v anglickém jazyce

The Vibration and Forces Control During the Rotor Rubbing by Application of Magnetically Sensitive Fluids Lubricating the Rotor Bearings

Popis výsledku anglicky

To achieve optimum performance of rotating machines damping in the rotor supports must be adaptable to the current operating speed. This arrived at a proposal of a new design of a coupling element that consists of a hydrodynamic bearing inserted into a controllable squeeze film damper. This paper deals with its effect on the behavior of a flexible rotor during rotor rubbing. Computer simulations were applied to carry out these investigations. The research is focused on minimizing the amplitude of the rotor vibration and magnitude of the force transmitted to the stationary part and of the impact forces induced by the disc collisions with the stationary part. The squeeze film bearing is lubricated by magnetically sensitive oil. The change of magnetic induction in the lubricating layer changes resistance against the oil flow and thus controls the damping force. In the computational model, the rotor is represented by a Jeffcott one. The pressure distribution in the thin oil layers is described by the Reynolds equations. The one related to the magnetically sensitive lubricant has been adapted to bilinear material. The contact stiffness and material damping in the vicinity of the impact point are considered as linear and the friction as of a Coulomb type. The main advantages of the studied technological solution are that the proposed support element makes it possible to reduce the forces transmitted to the stationary part, to reduce amplitude of the rotor vibration, and to utilize all advantages of hydrodynamic bearings. In addition, the control is very simple as the controller can work only in the on/off regime.

Druh

C - Kapitola v odborné knize

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Vibration Engineering for a Sustainable Future

ISBN

978-3-030-46466-0

Počet stran výsledku

7

Strana od-do

121-127

Počet stran knihy

402

Název nakladatele

Springer Verlag

Místo vydání

Cham

Kód UT WoS kapitoly

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