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Actively Controlled Journal Bearings for Machine Tools

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F20%3A10245763" target="_blank" >RIV/61989100:27230/20:10245763 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.intechopen.com/books/machine-tools-design-research-application/actively-controlled-journal-bearings-for-machine-tools" target="_blank" >https://www.intechopen.com/books/machine-tools-design-research-application/actively-controlled-journal-bearings-for-machine-tools</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.5772/intechopen.92272" target="_blank" >10.5772/intechopen.92272</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Actively Controlled Journal Bearings for Machine Tools

  • Original language description

    The advantage of journal hydrodynamic bearings is high radial load capacity and operation at high speeds. The disadvantage is the excitation of vibrations, called an oil whirl, after crossing a certain threshold of the rotational speed which depends on the radial bearing clearance, the viscosity of lubricating oil, and the rotor mass. A passive way of how to suppress vibrations consists of adjusting the shape of the bearing bushing. Vibrations can be suppressed using the system of active vibration damping with piezoactuators to move the bearing bushing in two directions. The displacement of the bearing bushing is actuated by two piezoactuators, which respond to the position of the bearing journal relative to the bearing housing. Two stacked linear piezoactuators are used to actuate the location of the bearing bushing. A pair of capacitive sensors senses the position of the journal or shaft. The system of the actively controlled journal bearings is the first functional prototype in the known up to now. It works with a cylindrical bushing which does not require special technology of manufacturing and assembly. This new bearing enables not only to damp vibrations but also serves to maintain the desired bearing journal position with an accuracy of micrometers.

  • Czech name

  • Czech description

Classification

  • Type

    C - Chapter in a specialist book

  • CEP classification

  • OECD FORD branch

    20301 - Mechanical engineering

Result continuities

  • Project

    <a href="/en/project/EF16_019%2F0000867" target="_blank" >EF16_019/0000867: Research Centre of Advanced Mechatronic Systems</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2020

  • Confidentiality

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

Data specific for result type

  • Book/collection name

    Machine Tools

  • ISBN

    978-1-83962-351-6

  • Number of pages of the result

    22

  • Pages from-to

    105-126

  • Number of pages of the book

    148

  • Publisher name

    IntechOpen

  • Place of publication

    Londýn

  • UT code for WoS chapter