Kinematic analysis of complex gear mechanisms [PDF]
, 2010 This paper presents a general kinematic analysis method for complex gear mechanisms. This approach involves the null-space of the adjacency matrix associated with the graph of the mechanism weighted by complex coecients.
Alazard, Daniel, Penaud, Julie
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LubricantsIn aerospace technology, angular contact ball bearings are required to exhibit extremely high operational precision, necessitating real-time monitoring of their wear status to conduct pre-failure analysis.
Xiaoyan Mu +4 more
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Study of ball bearing torque under elastohydrodynamic lubrication [PDF]
Spinning and rolling torques were measured in an angular-contact ball bearing with and without a cage under several lubrication regimes in a modified NASA spinning torque apparatus.
Allen, C. W. +2 more
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Evaluation of a hybrid hydrostatic bearing for cryogenic turbopump application [PDF]
A hybrid hydrostatic bearing was designed to operate in liquid hydrogen at speeds to 80,000 rpm and radial loads to 440 n (100 lbf). The bearing assembly consisted of a pair of 20-mm angular-contact ball bearings encased in a journal, which was in turn ...
Hannum, N. P. +2 more
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Endurance and failure characteristics of main-shaft jet engine bearings at 3x10 to the 6th power DN [PDF]
Groups of thirty 120-mm bore angular contact ball bearings were endurance tested at a speed of 12,000 and 25,000 rpm and a thrust load of 66 721 N. The bearings were manufactured from a single heat of VIM-VAR AISI M-50 steel.
Bamberger, E. N. +2 more
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Параметричні коливання радіально-упорного кулькового підшипника [PDF]
, 2011 Theoretical research of conditions of origin of a parametric resonance angular contact ball bearing taking into account variable performance of its rigidity is carried out.
Боронко, О. О. +2 more
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A Dynamic Analysis of Angular Contact Ball Bearing 7205C Used for a Scraper Conveyor
Applied SciencesAs core pieces of transport equipment in longwall mining systems, scraper conveyors operate under extremely harsh and dynamic loading conditions. Their operational reliability and service life primarily depend on the performance of critical components ...
Shaoping Hu +4 more
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Fail-Safe Operation of a High-Temperature Magnetic Bearing Investigated for Gas Turbine Engine Applications [PDF]
The Structural Mechanics and Dynamics Branch at the NASA Glenn Research Center has developed a three-axis high-temperature magnetic bearing suspension rig to enhance the safety of the bearing system up to 1000 F.
Choi, Benjamin B., Montague, Gerald T.
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Thermally affected stiffness matrix of angular contact ball bearings in a high-speed spindle system
Advances in Mechanical Engineering, 2019 Bearing stiffness directly affects the dynamic characteristics in a high-speed spindle system and plays an important role in terms of manufacturing quality.
Dinh Sy Truong +2 more
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Performance of jet- and inner-ring-lubricated 35 millimeter bore ball bearings operating to 2.5 million DN [PDF]
Parametric tests were conducted with a 35 millimeter bore, angular contact ball bearing having a single outer land guided cage. Lubrication was achieved by flowing oil through axial grooves and radial holes machined in the inner ring of the bearing. Test
Schuller, F., T., Signer, H. R.
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