Results 81 to 90 of about 38,665 (216)
LubricantsSolid-lubricated rolling bearings are widely used in the aerospace field and are key components to support spacecraft rotors. During the start-up of the engine, the sharp acceleration may cause bearing skidding, resulting in damage of the solid ...
Shijie Zhang +3 more
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Analysis and Experimental Study on Bearing Temperature Rise of High Speed Machine Tools
Jixie chuandong, 2023 In high-speed machine tools, the friction heat of bearings will cause the deformation of the rolling body and the "burning shaft", which will reduce the fatigue life of bearings and affect the normal operation of equipment.
Li Jiangshan +4 more
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Tester for study of rolling element bearings [PDF]
, 1967 Five-ball fatigue tester makes possible the study of rolling element phenomena. The device consists of a driven test ball pyramided upon four lower balls positioned by a separator and free to rotate in an angular contact ...
Zaretsky, E. V.
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Impact of NASA-sponsored research on aircraft turbine engine bearing specifications [PDF]
, 1983 The advancement of the state-of-the-art in aircraft bearing materials technology is reviewed.
Nahm, A. H.
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Dynamics Simulation Analysis of Single Row Four Point Contact Ball Slewing Bearing
Jixie chuandong, 2020 Based on multi-body dynamics method and Hertz contact theory， the Impact function is applied to define four-point contact of steel ball in slewing bearing and meshing contact action of straight teeth with internal teeth.
Jian Zhao, Tingqiang Yao, Ruibo Chen
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Analysis of Space Station Centrifuge Rotor Bearing Systems: A Case Study [PDF]
A team of NASA bearing and lubrication experts was assembled to assess the risk for the rolling-element bearings used in the International Space Station (ISS) centrifuge rotor (CR) to seize or otherwise fail to survive for the required 10-year life.
Loewenthal, Stuart H. +5 more
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Thermal Error Modelling of a CNC Machine Tool Feed Drive System using FEA Method [PDF]
, 2016 Recirculating ball screw systems are commonly used in machine tools and are one of the major heat sources which cause considerable thermal drift in CNC machine tools.
Abuaniza, Ayman +3 more
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LubricantsTo investigate the temperature rise characteristics and tribological performance of angular contact ball bearings equipped with polymer-based self-lubricating retainers under oil-depleted conditions.
Zhining Jia, Caizhe Hao
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Assurance of lubricant supply in wet-lubricated space bearings [PDF]
, 1976 Conventional lubrication techniques appear to be satisfactory, but rigorous proof of meeting a ten-year life requirement is lacking. One approach provides additional lubricant only when commanded from ground control, while the other passively augments ...
Glassow, F. A.
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Jixie chuandong, 2014 The solution of load distribution of rolling element bearing is closely related to the calculation of some key performance indicators,such as load-carrying capacity,lubrication characteristics,fatigue life and so on.In view of dimension deviation of ...
周夕维, 徐华, 熊显智, 王琳
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