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2 Acta Mechanica et Automatica

2 2008

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Traceability and capability control of mass measurement equipment and drift statistical analysis of national mass standards in Latvia

Ivanova T., Rudzitis J.

Acta Mechanica et Automatica

2008

Vol. 2, no. 3

42-50

LNMC is highest metrological institute of Latvia. The paper describes national mass standards currently in use, their traceability, stability, mass measurement equipment and related techniques.

High frequency vibration monitoring and diagnostics of high-speed pump rolling bearings

Litvinov D., Rudzitis J.

Acta Mechanica et Automatica

2008

Vol. 2, no. 3

76-79

Evolution of modern industry makes great demands to reliable work of pump equipment with large revolutions number of rotating parts. Under special supervision must be the centrifugal high-speed pumps. One of the major and hardly loaded units of high-speed pump equipment are rolling bearings, therefore it is very important to conduct monitoring and early diagnostics works to find out defects in them. For the high-frequency vibration detection and analysis it is possible to use both stationary and portable systems of monitoring and diagnostics. This diagnostics advantage is early detection of aberration from normal operation of rolling bearings and transition from equipment service and repair on-schedule to real situation service and repair, which is determined on periodic diagnostics results.