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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20301 - Mechanical engineering

Project

<a href="/en/project/FW03010357" target="_blank" >FW03010357: Research and development of hydrostatic drive and turntable mounting based on adaptive control loops</a><br>

Continuities

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

Publication year

2025

Confidentiality

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

Name of the periodical

JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME

ISSN

0742-4787

e-ISSN

1528-8897

Volume of the periodical

147

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

8

Pages from-to

1-8

UT code for WoS article

001586801800031

EID of the result in the Scopus database

2-s2.0-105013754225