Results 1 to 10 of about 517 (109)

Experimental study on the lubrication characteristics of porous circular journal bearing under shaft unsteady condition (Examination into the whirling behavior of shaft at pivot supported condition by measuring the time history waveform of shaft with parameter of diametral clearance changes)

Transactions of the JSME (in Japanese), 2015
This report is described the study on the lubrication characteristics of porous circular journal bearing made with oil impregnate sintered materials as a DC spindle motor's bearing system.
Shigeru Ohtsuka
exaly   +5 more sources

Numerical Analysis on the Unsteady Radial Load on the Shaft of a Large-Scale Dredge Pump Unit [PDF]

Journal of Applied Fluid Mechanics, 2023
Vibration and fatigue damage of pump shafts has become a prominent engineering problem, indicating the need for higher-quality reliability analysis of the pump unit in the design stage. In this study, the unsteady flow field in a large centrifugal dredge
Cao L, Wu T, Guo T
exaly   +2 more sources

Experimental Study on the Thrust-Radial Coupled Porous Bearings with Hydrodynamic Shape Forming under Shaft Unsteady Condition (Examination for the Time History Waveform of Shaft Whirling on Thrust-Radial Coupled Porous Bearings under Unsteady Shaft Starting Condition)

Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, 2011
Shigeru Ohtsuka
exaly   +3 more sources

Experimental Study on the Lubrication Characteristics of Thrust-Radial Coupled Porous Bearings with Hydrodynamic Shape Forming under Shaft Unsteady Condition (Examination for the Influence of Diametral Clearance Change to the Time History Waveform of Shaft on Thrust-Radial Coupled Porous Bearings under Shaft Starting Condition)

Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, 2013
Shigeru Ohtsuka
exaly   +3 more sources

Experimental Study on the Lubrication Characteristics of Porous Journal Bearings with Hydrodynamic Shape Forming at Annular Surface under Shaft Unsteady Condition (Examination into the Whirling Behavior of Shaft at Pivot Supported Condition by Analyzing the Frequency Spectrum of Time History Waveform with Parameter of Gradient on Starting Revolution Speed Changes)

Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, 2013
Shigeru Ohtsuka
exaly   +3 more sources

Investigation on the Effect of the Shaft Transition Form on the Inflow Pattern and Hydrodynamic Characteristics of the Pre-Shaft Tubular Pump Device

Frontiers in Energy Research, 2022
The shaft tubular pump device is widely used in low head pumping stations in plain areas. The N-S equation and the SST k-ω turbulence model are adopted.
Can Luo, Kang Du, Weijun Qi, Li Cheng, Xianbei Huang, Jiaxing Lu, Jiaxing Lu   +6 more
doaj   +1 more source

Numerical Simulation on Transient Pressure Pulsations and Complex Flow Structures of a Ultra-High-Speed Centrifugal Pump at Stalled Condition

Energies, 2023
A high-speed centrifugal pump is the key facility to deliver oil in an aero-engine. The stable operation is quite important to the safety of the engine.
Zhenhua Zhou, Huacong Li, Jinbo Chen, Delin Li, Ning Zhang   +4 more
doaj   +1 more source

Thermo-hydrodynamic lubrication analysis of journal bearings using a simplified THL model and prediction of onset speed of instability (Application of adiabatic boundary condition to the journal side)

Nihon Kikai Gakkai ronbunshu, 2023
Journal bearings are an important mechanical element of rotating machines and support the rotor system by oil film reaction forces. As rotational speeds increase, the shear heat of the oil film causes a significant temperature distribution on the journal
Makoto SOGO, Tsuyoshi INOUE, Kiyoshi HATAKENAKA   +2 more
doaj   +1 more source

Numerical Simulation of Unsteady Cavitation Flow in a Low-Specific-Speed Centrifugal Pump with an Inducer

Journal of Marine Science and Engineering, 2022
Cavitation is an undesirable phenomenon in the pumps. In this paper, unsteady cavitation flow in a low-specific-speed centrifugal pump with an inducer is investigated based on the full cavitation model and standard k-ε turbulence model using the ...
Baoling Cui, Xiaotian Han, Yinchu An
doaj   +1 more source

Experimental study of controlling tip clearance flow in a pump-jet propulsor

Zhongguo Jianchuan Yanjiu, 2023
ObjectiveThis paper aims to suppress the adverse effects of tip clearance flow on the hydrodynamic performance and unsteady excitation force of a pump-jet propulsor. MethodAs for the pre-swirl stator pump-jet propulsor, an annular flexible seal structure
Ruilin HAN, Haiting YU, Hongxing HUA, Huiyao LI, Xiuchang HUANG, Xiaoqian DONG   +5 more
doaj   +1 more source