Experimental validation of the operation of tilting-pad journal bearing lubricated by high-test peroxide under excessive vibrations and reduced flow of the lubricant

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F23%3APU148154" target="_blank" >RIV/00216305:26210/23:PU148154 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0043164823001849" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0043164823001849</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.wear.2023.204801" target="_blank" >10.1016/j.wear.2023.204801</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental validation of the operation of tilting-pad journal bearing lubricated by high-test peroxide under excessive vibrations and reduced flow of the lubricant

Popis výsledku v původním jazyce

Hydrogen peroxide is commonly used as a low-toxicity liquid rocket propellant (oxidizer). Hydrodynamic bearings lubricated by this propellant may be applicable in rocket engine pumps. In this paper, a hydrodynamic tilting-pad journal bearing lubricated by highly concentrated (87wt%) hydrogen peroxide was proposed. Furthermore, an experimental validation of the performance of this bearing with pads made of PEEK material (polyetheretherketone) was carried out on the developed high-speed measuring device. To verify the endurance of this bearing, measurements were performed at different peroxide flow rates from 100% to 20% of the nominal flow rate. The tests were also conducted under excessive vibrations induced by the misalignment of the test rotor with the drive connected by a flexible coupling. In addition to vibration measurement, the wear of the bearing sliding surfaces and lubricant temperature variations were evaluated. The measured results were compared with the calculated data. For this purpose, a two-dimensional computational model based on the thermo-elasto-hydrodynamic lubrication theory was presented. To improve the solution convergence, Newton's method was used to calculate the equilibrium tilt of the pads. The involved bearings operated smoothly at the mentioned misalignment even at 20% peroxide flow, only slight foaming occurred at the outlet.

Název v anglickém jazyce

Experimental validation of the operation of tilting-pad journal bearing lubricated by high-test peroxide under excessive vibrations and reduced flow of the lubricant

Popis výsledku anglicky

Hydrogen peroxide is commonly used as a low-toxicity liquid rocket propellant (oxidizer). Hydrodynamic bearings lubricated by this propellant may be applicable in rocket engine pumps. In this paper, a hydrodynamic tilting-pad journal bearing lubricated by highly concentrated (87wt%) hydrogen peroxide was proposed. Furthermore, an experimental validation of the performance of this bearing with pads made of PEEK material (polyetheretherketone) was carried out on the developed high-speed measuring device. To verify the endurance of this bearing, measurements were performed at different peroxide flow rates from 100% to 20% of the nominal flow rate. The tests were also conducted under excessive vibrations induced by the misalignment of the test rotor with the drive connected by a flexible coupling. In addition to vibration measurement, the wear of the bearing sliding surfaces and lubricant temperature variations were evaluated. The measured results were compared with the calculated data. For this purpose, a two-dimensional computational model based on the thermo-elasto-hydrodynamic lubrication theory was presented. To improve the solution convergence, Newton's method was used to calculate the equilibrium tilt of the pads. The involved bearings operated smoothly at the mentioned misalignment even at 20% peroxide flow, only slight foaming occurred at the outlet.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/TK04030262" target="_blank" >TK04030262: Plynem mazaná aerodynamická ložiska pro použití ve vodíkových a jiných vysokootáčkových aplikacích</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

WEAR

ISSN

0043-1648

e-ISSN

1873-2577

Svazek periodika

523

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

„“-„“

Kód UT WoS článku

000982274300001

EID výsledku v databázi Scopus

2-s2.0-85151434532