Results 71 to 80 of about 18,648 (210)

Research on the nonlinear dynamic characteristics of opposed high-speed gas bearing systems

Journal of Low Frequency Noise, Vibration and Active Control, 2020
In recent years, the opposed high-speed gas bearing system has been gradually valued and used in the field of precision machinery, especially for precision instruments and mechanisms requiring high speed, high precision, and high rigidity.
Cheng-Chi Wang, Rong-Mao Lee, Chih-Jer Lin, Chih-Yung Huang, Tsui-Er Lee   +4 more
doaj   +1 more source

Chuck for delicate drills [PDF]

, 1972
Development of oil film technique to couple power between drive spindle and drill chuck for delicate drilling operations is discussed. Oil film permits application of sufficient pressure, but stops rotating when drill jams.
Copeland, C. S.
core   +1 more source

Research on the Calculation Method for the Contact Stress of Wind Turbine Main Shaft Bearings Based on Finite Element Analysis

Lubricants
Under alternating loads, the contact situation for self-aligning roller bearings in the main shaft of a wind turbine is complex. Few methodologies exist for calculating the contact stress of main shaft bearings.
Yi Zou, Wenlei Sun, Hongwei Wang, Tiantian Xu, Bingkai Wang   +4 more
doaj   +1 more source

Restoration of the tribotechnical pairs in equipment of mining industry [PDF]

, 2019
Purpose. Substantiation of the possibilities and development of technology for the restoration of the worn-out tribotechnical pairs of mining equipment by methods of hot radial stamping in powder metallurgy using technogenic waste. Methods.
Biloshytska, N, Biloshytskyi, M, Tatarchenko, H   +2 more
core   +1 more source

A new test machine for measuring friction and wear in controlled atmospheres to 1200 C [PDF]

This paper describes a new high temperature friction and wear test apparatus (tribometer) at NASA Lewis Research Center, Cleveland, Ohio. The tribometer can be used as a pin-on-disk or pin-on-ring configuration and is specially designed to measure the ...
Dellacorte, Christopher, Sliney, Harold E.   +1 more
core   +1 more source

Running performance of an aerodynamic journal bearing with squeeze film effect [PDF]

, 2013
Results of theoretical and experimental studies concerning the performance of an aerodynamic journal bearing which running is assisted by squeeze film ultrasonic levitation (SFUL) are presented in this paper.
Ha, Ono, Salbu, Shigeka Yoshimoto, Stolarski, Stolarski, Stolarski, Stolarski, Tadeusz Stolarski, Tomohiro Shou, Vandaele, Wiesendanger, Xue, Yoshimoto   +13 more
core   +1 more source

Design of an electrochemical micromachining machine [PDF]

, 2014
Electrochemical micromachining (μECM) is a non-conventional machining process based on the phenomenon of electrolysis. μECM became an attractive area of research due to the fact that this process does not create any defective layer after machining and ...
A Muetze, A Spieser, AB Kamaraj, AB Kamaraj, AL Trimmer, Alexandre Spieser, Atanas Ivanov, AW Labib, B Bhattacharyya, BJ Park, C-T Lin, D Huo, DS Bilgi, ES Lee, G Skrabalak, HS Shin, J Kozak, J Kozak, JA McGeough, KP Rajurkar, KP Rajurkar, L Cagnon, M Datta, M Kock, M Sen, M Wang, MAH Mithu, MAH Mithu, PT Stanev, R Schuster, S Burkert, TKKR Mediliyegedara, U Çaydaş, V Kirchner, X Lu, X Luo, Y Lu, YJ Zhang, Z Zhang, Z Zhang, Z-W Fan   +40 more
core   +1 more source

OPTIMIZING STATIC AND DYNAMIC STIFFNESS OF MACHINE TOOLS SPINDLE SHAFT, FOR IMPROVING MACHINING PRODUCT QUALITY

Journal of KONES. Powertrain and Transport, 2015
Automotive industries in Indonesia have grown up fast, and in-line with it, machine tools population has also grown up. Nevertheless, most of these machines are imported, because there are only few machine tools industries in Indonesia. Based on this situation, Indonesia has started to build its own machine tools industry in order to support mostly ...
Tri Prakosa, Agung Wibowo, Rizky Ilhamsyah   +2 more
openaire   +1 more source

An Investigation on Speed Control of a Spindle Cluster Driven by Hydraulic Motor: Application to Metal Cutting Machines

International Journal of Rotating Machinery, 2019
In this article, we present an experimental study on the speed stability of a spindle driven by a hydraulic motor, which is controlled by a proportional valve, through a V-belt transmission.
Ngoc Hai Tran, Cung Le, Anh Dung Ngo
doaj   +1 more source

Dual motion valve with single motion input [PDF]

, 1987
A dual motion valve includes two dual motion valve assemblies with a rotary input which allows the benefits of applying both rotary and axial motion to a rotary sealing element with a plurality of ports.
Belew, Robert
core   +1 more source