The influence of temperature on dynamics of the rotor – foil bearing system

• Autorzy: Bagiński P. , Żywica G.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the research on the effect of elevated temperature on the dynamic performance of a rotor supported by foil bearings. The tests were carried out on the test rig equipped with a module for increasing temperature around the bearings. A 3 kW motor with two ceramic ball bearings was connected to the shaft by means of a flexible coupling. The shaft was supported by gas foil bearings. The maximum rotational speed of the rotor was 24000 rpm. The tests were performed with the operating rotor, covering multiple start and stop cycles at room and elevated temperatures. During the first stage of experimental investigation vibration, displacement and temperature values for the two bearings were recorded. Then, the temperature was raised to approx. 200 ◦C within one of the bearing supports. The parameters mentioned above were registered and compared with the results obtained during room temperature operation. After each test bearings were disassembled, regenerated as necessary and reassembled. After analysis of the results achieved, it could be noted that the system was sensitive to the altering of operating conditions of the rotor. The elevated temperature around the shaft has increased its diameter, thereby reducing the lubricating gap. In spite of adverse operating conditions affecting the rotor, the whole system operated in a safe and stable manner.

Słowa kluczowe

EN

foil bearings; rotordynamics; temperature distribution

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN
• Czasopismo: Transactions of the Institute of Fluid-Flow Machinery
• Rocznik: 2016
• Tom: nr 134
• Strony: 11--28
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Bagiński P.

• Department of Turbine Dynamics and Diagnostics, Institute of Fluid Flow Machinery, Polish Academy of Sciences, 80-231 Gdańsk, Fiszera 14, Poland

autor

Żywica G.

• Department of Turbine Dynamics and Diagnostics, Institute of Fluid Flow Machinery, Polish Academy of Sciences, 80-231 Gdańsk, Fiszera 14, Poland

Bibliografia

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