Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"oil seals"”.
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Analysis of tilting-pad oil seals for high pressure centrifugal compressors
Oil ring seals are one major source of instability in high pressure centrifugal compressors. This thesis presents a method for analysis of an improved seal concept that has been used in very high pressure designs (900 PSI). The improved design uses a combination of ring seals and tilting pad …
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Development of multiscale models for the performance of the gas and oil seals in rotary engines
… shape which leads to higher gas leakage and oil consumption resulting in lower efficiency and higher emissions. In order to address this problem, this thesis presents a set of multiscale models to assess rotary engine performances by estimating gas leakage, oil consumption, wear and friction. …
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Non-linear finite element thermo-hydrodynamic analysis of oil ring seals used in high pressure centrifugal compressors
The analysis of oil seals is of great concern for the proper design of high pressure centrifugal compressors, because they can have significant influence on the dynamic stability of the compressor rotor. The lack of adequate analytical tools highlight the need for this type of study. An analytical …
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The determination of pressure profiles in oil ring seals considering the influence of temperature gradients in the sealing fluid
The analysis of ring type seals is of great concern for the designer of high speed and high pressure centrifugal compressors. Computers now play a major role in allowing for a quick evaluation of the floating ring seal. Since the accuracy of the rotor shaft stability evaluation depends on the …