Results 21 to 30 of about 1,204 (264)

Discussion on the Non-Linear Stability of Short Hydrodynamic Bearings by Applying Rabinowitsch Fluid Model

Lubricants
Using the Rabinowitsch fluid model, the effects of dilatant fluids (a non-Newtonian factor less than 0) and pseudo-plastic fluids (a non-Newtonian factor greater than 0) on the non-linear stability of hydrodynamic journal bearings is discussed.
Huaiqing Lu, Chunyan Cheng, Zhuxin Tian
doaj   +1 more source

Investigation on hydrodynamic lubrication of bearings in a left ventricular assisted device

Friction, 2019
Formations of clots were found inside the hydrodynamic bearings of the left ventricular assisted devices (LVADs) and caused tremendous risks to the long-term use of these devices.
Xiaobing Zheng, Yongjian Li, Haosheng Chen, Shengshou Hu, Jianye Zhou   +4 more
doaj   +1 more source

A Review on Performance Characteristics of an Air Foil Thrust Bearing

Tribology Online, 2022
The axial loads of high-speed rotating turbo machines are supported by self-acting hydrodynamic components known as air foil thrust bearings (AFTB). The load bearing capability of these bearings depends primarily on the foil structure and secondarily on ...
Supreeth Shivakumar, Thippaiah NagaRaju, Rattehalli Ningachar Ravikumar, Mahesha Chikkabagilu Rudraiah   +3 more
doaj   +1 more source

Long marine shafting alignment and optimization considering propeller hydrodynamic force in wake field

Zhongguo Jianchuan Yanjiu, 2023
ObjectivesThe traditional method of marine propulsion shafting alignment calculation usually ignores the influence of the ship's wake field, causing a large deviation between the computational result of the propeller hydrodynamic force and the real value
Zheng GU, Jinlin LIU, Ruiping ZHOU, Shiyu FANG, Rongguo ZHANG, Cunming LIN   +5 more
doaj   +1 more source

Experimental study on the lubrication characteristics of porous journal bearings with hydrodynamic shape forming at annular surface under sine-wave vibrated conditions (Examination into the shaft whirling behavior at pivot supported condition by measuring the time history waveform on shaft with parameter of vibrated Frequency changes)

Nihon Kikai Gakkai ronbunshu, 2018
This report describes the study on the lubrication characteristics of porous journal bearings as a DC spindle motor's bearing system made with oil impregnated sintered materials having some hydrodynamic shapes. Herring Bone (I & II), Three Lobed
Shigeru OHTSUKA, Masaki YAKABE, Yasutaka HAYAMIZU, Koichi OTSUKA   +3 more
doaj   +1 more source

Experimental study on the lubrication characteristics of porous journal bearings with hydrodynamic shape forming at annular surface under sine-wave vibrated conditions (Examination into the shaft rotating behavior at the starting state by identifying the rotational modes with Frequency Spectrum Analysis of the time history waveform on shaft)

Nihon Kikai Gakkai ronbunshu, 2019
This report describes the study on the lubrication characteristics of porous journal bearings, which were made with oil impregnated sintered materials having some hydrodynamic shapes, to apply them for a DC Spindle Motor’s bearing system. Herring Bone (I
Shigeru OHTSUKA, Masaki YAKABE, Yasutaka HAYAMIZU, Koichi OTSUKA   +3 more
doaj   +1 more source

Intrinsic Photoactive Star ZnPc–Poly(glutamate) Nanoplatforms for Multimodal Glioblastoma Therapy and Brain‐Targeted Delivery

Advanced Functional Materials, EarlyView.
An intrinsic photoactive star‐shaped zinc phtalocyanine‐poly(L‐glutamic acid) (ZnPc‐PGA) nanoplatform for multimodal glioblastoma (GBM) therapy and brain‐targeted elivery. A ZnPc‐PGA‐based multifunctional theranostic nanocarrier platform enables image‐guided, multimodal GBM therapy. ZnPc‐PGA nanocarriers support the integration of fluorescence imaging,
Amina Benaicha‐Fernández, Teodora Ranđelović, Ana Armiñán, Víctor Sebastián, Manuel Fuentes, Cristián Huck‐Iriart, Esther Masiá, Paula Carrascosa‐Marco, Pablo Juanes‐Velasco, Snežana Đorđević, Clara Bayona, Ignacio Ochoa, Maria Medel, Inmaculada Conejos‐Sánchez, María J. Vicent   +14 more
wiley   +1 more source

Numerical Analysis of the Mixed-Lubrication Performance of Staved Stern Tube Bearings Lubricated with Water

Lubricants, 2023
The present study aims to establish a mixed lubrication model for staved stern tube bearings lubricated with water, in which the average Reynolds equation and a KE elastic–plastic contact model are introduced to calculate the hydrodynamic pressure and ...
Dongxing Tang, Yanfeng Han, Lei Yin, Yi Chen   +3 more
doaj   +1 more source

Semiconducting Polymers Post‐Functionalized With Ureido‐Pyrimidinone for Robust Stretchable Transistors

Advanced Functional Materials, EarlyView.
The design of intrinsically robust stretchable semiconducting polymers was achieved through OTBS‐mediated post‐functionalization of PDPP2T side chains with UPy units, generating dual hydrogen‐bonding motifs comprising weaker urethane linkages and strong quadruple UPy interactions along the long alkyl side chain, which is crucial for achieving desirable
Dinda Bazliah, Livy Laysandra, Kosuke Terayama, Xingyu Yang, Atsushi Isobe, Tai‐Chin Chiang, Tsuyoshi Michinobu, Yu‐Cheng Chiu   +7 more
wiley   +1 more source

A CFD-Based Frequency Response Method Applied in the Determination of Dynamic Coefficients of Hydrodynamic Bearings. Part 1: Theory

Lubricants, 2019
A general, CFD-based frequency response method for obtaining the dynamic coefficients of hydrodynamic bearings is presented. The method is grounded in experimental parameter identification methods and is verified for an extremely long, slider bearing ...
Troy Snyder, Minel Braun
doaj   +1 more source