A Comparative Study of the Dynamic Stability of a Rotor Supported by an Air-Bearing and an Air-ring Bearing
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Title |
A Comparative Study of the Dynamic Stability of a Rotor Supported by an Air-Bearing and an Air-ring Bearing
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Creator |
Muthanandam, Muruganandam
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Subject |
Dynamic coefficients
Gas-lubricated Hydrostatic journal bearing Self-excited vibration Stability threshold speed |
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Description |
629-645
An exploration to justify the need for an air-ring around an air-bearing is done by comparing the dynamic stability plots of a rotor supported by air-bearings with and without an air-ring. Air-bearing with air-ring or air-ring bearing has pocketed feed-holes. The air-bearing without air-ring has plain feed-holes and it is referred to as air-bearing with a direct feeding system. A linearized free-vibration model rotor-bearing is used to analyze the dynamic stability. The dynamic coefficients of air-bearing with a direct feeding system and air-ring bearing are affected by whirl frequency due to the fluid compressibility effects. The stability threshold speed of the rotor air-ring bearing system is increased well above the threshold speed of the rotor air-bearing with a direct feeding system. The rotor critical mass of the rotor air-ring bearing system is smaller than that of the rotor air-bearing with a direct feeding system. The air-ring of air-ring bearing can prevent self-excited vibration in lightly loaded rotor-bearing systems. |
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Date |
2023-11-21T04:49:20Z
2023-11-21T04:49:20Z 2023-11 |
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Type |
Article
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Identifier |
0971-4588 (Print); 0975-1017 (Online)
http://nopr.niscpr.res.in/handle/123456789/62912 https://doi.org/10.56042/ijems.v30i4.5038 |
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Language |
en
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Publisher |
NIScPR-CSIR,India
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Source |
IJEMS Vol.30(4) [August 2023]
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