Failure prevention procedure of the Very Large Telescope hydrostatic bearing pads based on lubricating film thickness measurement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0198038" target="_blank" >RIV/00216305:26210/26:0198038 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1115/1.4068788" target="_blank" >https://doi.org/10.1115/1.4068788</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1115/1.4068788" target="_blank" >10.1115/1.4068788</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Failure prevention procedure of the Very Large Telescope hydrostatic bearing pads based on lubricating film thickness measurement

Popis výsledku v původním jazyce

Maintaining a uniform film thickness is crucial for ensuring the safety of hydrostatic bearings in telescopes. If the lubricating film is disrupted, it can lead to the collision of sliding surfaces, resulting in costly and time-consuming repairs. Since hydrostatic bearings enable the telescope movement, repairs interrupt observations. By monitoring film thickness, potential errors in specific bearing pads can be detected and addressed at an early stage. The current film thickness measurement method, using dial indicators, is applicable only under static conditions and can be influenced by human error when setting or reading the values. In contrast, using contactless sensors provides a more reliable and efficient method, ensuring higher safety for hydrostatic bearing systems (HBS). However, factors such as working conditions and the number of required sensors need to be considered. In this study, field tests were conducted to evaluate the current dial indicator method and simulate the effects of clogged capillary errors. The proposed contactless sensor setup was also tested under real conditions on bearing pads. The results indicate a potential approach for interpreting telescope movement scenarios. Given the serious consequences of bearing failure, regular monitoring of film thickness should be prioritised to mitigate the risk of significant damage.

Název v anglickém jazyce

Failure prevention procedure of the Very Large Telescope hydrostatic bearing pads based on lubricating film thickness measurement

Popis výsledku anglicky

Maintaining a uniform film thickness is crucial for ensuring the safety of hydrostatic bearings in telescopes. If the lubricating film is disrupted, it can lead to the collision of sliding surfaces, resulting in costly and time-consuming repairs. Since hydrostatic bearings enable the telescope movement, repairs interrupt observations. By monitoring film thickness, potential errors in specific bearing pads can be detected and addressed at an early stage. The current film thickness measurement method, using dial indicators, is applicable only under static conditions and can be influenced by human error when setting or reading the values. In contrast, using contactless sensors provides a more reliable and efficient method, ensuring higher safety for hydrostatic bearing systems (HBS). However, factors such as working conditions and the number of required sensors need to be considered. In this study, field tests were conducted to evaluate the current dial indicator method and simulate the effects of clogged capillary errors. The proposed contactless sensor setup was also tested under real conditions on bearing pads. The results indicate a potential approach for interpreting telescope movement scenarios. Given the serious consequences of bearing failure, regular monitoring of film thickness should be prioritised to mitigate the risk of significant damage.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/FW03010357" target="_blank" >FW03010357: Výzkum a vývoj hydrostatického pohonu a uložení točny na bázi adaptivních regulačních smyček</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME

ISSN

0742-4787

e-ISSN

1528-8897

Svazek periodika

147

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

001586801800031

EID výsledku v databázi Scopus

2-s2.0-105013754225