Open AccessVIBROACOUSTIC TESTING OF TRIBOUNITS ENDURANCE
Author(s) -
L.V. Efremov,
A.V. Tikalov,
Lyudmila Sanduovna Baeva
Publication year - 2017
Publication title -
vestnik astrahanskogo gosudarstvennogo tehničeskogo universiteta. seriâ: morskaâ tehnika i tehnologiâ
Language(s) - English
Resource type - Journals
eISSN - 2225-0352
pISSN - 2073-1574
DOI - 10.24143/2073-1574-2017-2-69-76
Subject(s) - vibration , acceleration , lubrication , bearing (navigation) , root mean square , rotational speed , laser doppler vibrometer , surface roughness , coupling (piping) , structural engineering , acoustics , materials science , mechanical engineering , engineering , computer science , physics , composite material , wavelength , electrical engineering , optoelectronics , classical mechanics , artificial intelligence , distributed feedback laser
For the development of standards of timing and amount of shipboard equipment maintenance and repair it is important to study and improve the theory and practice of evaluation of endurance of such friction pairs as sliding bearings. In the diagnosis of rolling bearings vibroacoustic methods are widely used, but, as for sliding bearings, these methods are still at the stage of research with respect to friction. Thereby, the results of testing different types of tribounit samples on friction test machines have been studied. There have been done vibration measurements for given conditions (rotation speed and load), where the root mean square values (RMS) of vibrational acceleration a in m/s2 or dB for acceleration were used as main diagnostic parameters. The authors have investigated dependencies of vibration levels for each band of tri-band spectrum on rotational speed, load, lubrication, surface roughness with respect to temperature, coefficient of friction and wear resistance. It has been proved that the source of VHF vibration of RMS is friction in coupling, depending on the surface condition and lubrication type of the friction pair. Dependency of acceleration RMS level on rotational speed and load of the sample has been stated. The results allow to infer about the effectiveness of the proposed tri-band vibroacoustic characteristics of the tribounits using vibrometer CM-21. This method can be used for diagnostics of sliding bearings, which can require standardization of modes and conditions of measurement and the establishment of zones of maximum permitted levels of the object state.