FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2521720669> ?p ?o ?g. }

• W2521720669 abstract "Three nominally-identical, 4-pad flexure-pivot-pad bearings (FPBs) were manufactured, varying only in their (dimensionless) pad preloads, namely, 0.264, 0.511, and 0.695. A hybrid hydrostatic bearing (HBB) was also manufactured with the same nominal length, diameter, and clearances. Water was used as the test fluid. The FPBs were tested at the following three constant supply pressures (Ps): 0.689, 2.76, and 5.52 bar. The HBB was tested with a supply pressure that increased linearly to these same three terminal pressures. A magnetic bearing was used to load all bearings with an applied unit-load profile that increased linearly with time to reach the following two peak values: 0.745 and 1.38 bar. The design speed ωd was the maximum planned speed for a test run, and it was varied over 3, 3.5, 4, and 4.5 krpm. The tests aimed to produce a linearly increasing speed profile, ω(t) = At, before reaching ωd. For the HBB, bearing Ps also nominally increased linearly with ω. At lift-off, the shaft leaves the bearing surface during the shaft’s angular acceleration and remains separated and supported over a finite time and speed range. In some circumstances, FPB bearings lifted off and were then forced back into contact with the shaft due to the linearly increasing applied load. Once lifted off, the HBB always remained separated from the bearing surface. The peak load capacity was the maximum load supported by a bearing once lifted off (even if it was subsequently forced back into contact). FPBs have been used successfully in commercial turbomachinery handling low viscosity fluids. The results reported here indicate that preloads of m = 0.264 and 0.695 have comparable lift-off and peak load-capacity performance, substantially better than the m = 0.511 bearing. The FPB data also show a surprising steady drop in lift-off speeds and peak-load capacity with increasing Ps values, presumably because of end seals that were provided. From these results, an FPB should be used with end seals and preloads of m = 0.264 or 0.695. The HBB lift-off ω values also dropped with increasing terminal Ps values. For example, at ωd = 4.5 krpm, an increase in terminal Ps from 0.689 bar to 2.76 bar dropped lift-off ω from ∼3 krpm to ∼ 300 rpm. The supply pressure provided to the HBB increased linearly with time and, consequently, also increased linearly with ω. In reality, a centrifugal pump Ps would be proportional to ω2. To the extent that HBB lift-off ω performance depends on the supply pressure at lift off, lift-off ω and load-capacity performance of the present HBB would be worse with Ps ∼ ω2, since the same required lift-off supply pressure would occur only at a higher ω. Except at ωd = 3.5 krpm, the FPBs had better (lower) liftoff speeds than the HBB. The HBB tested maintained a consistently better peak-load capacity than the FPB. In some cases, the shaft lifted off the FPB and then returned to contact. In all cases, the HBB remained in a lifted-off condition. As a final conclusion, the present data provide no clear basis for choosing between the FPBs and the HBB." @default.
• W2521720669 created "2016-09-30" @default.
• W2521720669 creator A5012540375 @default.
• W2521720669 creator A5031998279 @default.
• W2521720669 date "2016-06-13" @default.
• W2521720669 modified "2023-09-26" @default.
• W2521720669 title "Comparative Lift-Off Performance in Flexure Pivot Pad and Hybrid (Hydrostatic and Hydrodynamic) Bearings With Water as the Test Fluid" @default.
• W2521720669 doi "https://doi.org/10.1115/gt2016-56212" @default.
• W2521720669 hasPublicationYear "2016" @default.
• W2521720669 type Work @default.
• W2521720669 sameAs 2521720669 @default.
• W2521720669 citedByCount "0" @default.
• W2521720669 crossrefType "proceedings-article" @default.
• W2521720669 hasAuthorship W2521720669A5012540375 @default.
• W2521720669 hasAuthorship W2521720669A5031998279 @default.
• W2521720669 hasConcept C121332964 @default.
• W2521720669 hasConcept C124101348 @default.
• W2521720669 hasConcept C127313418 @default.
• W2521720669 hasConcept C127413603 @default.
• W2521720669 hasConcept C134853933 @default.
• W2521720669 hasConcept C139002025 @default.
• W2521720669 hasConcept C187320778 @default.
• W2521720669 hasConcept C199104240 @default.
• W2521720669 hasConcept C41008148 @default.
• W2521720669 hasConcept C57879066 @default.
• W2521720669 hasConcept C62520636 @default.
• W2521720669 hasConcept C66938386 @default.
• W2521720669 hasConcept C78519656 @default.
• W2521720669 hasConceptScore W2521720669C121332964 @default.
• W2521720669 hasConceptScore W2521720669C124101348 @default.
• W2521720669 hasConceptScore W2521720669C127313418 @default.
• W2521720669 hasConceptScore W2521720669C127413603 @default.
• W2521720669 hasConceptScore W2521720669C134853933 @default.
• W2521720669 hasConceptScore W2521720669C139002025 @default.
• W2521720669 hasConceptScore W2521720669C187320778 @default.
• W2521720669 hasConceptScore W2521720669C199104240 @default.
• W2521720669 hasConceptScore W2521720669C41008148 @default.
• W2521720669 hasConceptScore W2521720669C57879066 @default.
• W2521720669 hasConceptScore W2521720669C62520636 @default.
• W2521720669 hasConceptScore W2521720669C66938386 @default.
• W2521720669 hasConceptScore W2521720669C78519656 @default.
• W2521720669 hasLocation W25217206691 @default.
• W2521720669 hasOpenAccess W2521720669 @default.
• W2521720669 hasPrimaryLocation W25217206691 @default.
• W2521720669 hasRelatedWork W1991885224 @default.
• W2521720669 hasRelatedWork W2001827602 @default.
• W2521720669 hasRelatedWork W2017102342 @default.
• W2521720669 hasRelatedWork W2020330033 @default.
• W2521720669 hasRelatedWork W2046787684 @default.
• W2521720669 hasRelatedWork W2067621206 @default.
• W2521720669 hasRelatedWork W2069709735 @default.
• W2521720669 hasRelatedWork W2079853654 @default.
• W2521720669 hasRelatedWork W2327648165 @default.
• W2521720669 hasRelatedWork W2343275398 @default.
• W2521720669 hasRelatedWork W2470486153 @default.
• W2521720669 hasRelatedWork W2548521186 @default.
• W2521720669 hasRelatedWork W2746940687 @default.
• W2521720669 hasRelatedWork W2916137905 @default.
• W2521720669 hasRelatedWork W2975544519 @default.
• W2521720669 hasRelatedWork W2986771243 @default.
• W2521720669 hasRelatedWork W3000742741 @default.
• W2521720669 hasRelatedWork W3123792199 @default.
• W2521720669 hasRelatedWork W3125448228 @default.
• W2521720669 hasRelatedWork W306769034 @default.
• W2521720669 isParatext "false" @default.
• W2521720669 isRetracted "false" @default.
• W2521720669 magId "2521720669" @default.
• W2521720669 workType "article" @default.