Results 141 to 150 of about 3,846 (166)

Liquid-free cooling of motor spindle shafts

2023
Wärmeentwicklung reduziert die Leistungsfähigkeit von Motorspindeln. Insbesondere die Erwärmung der Welle führt zu unerwünschten Effekten. Zur Kühlung der Welle existieren flüssigkeitsbasierte Kühlsysteme, die jedoch teuer und anfällig gegenüber Leckage sind.
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Dynamic Modeling of Aerostatic Spindle With Shaft Tilt Deformation

Journal of Manufacturing Science and Engineering, 2019
Abstract This paper presents a new dynamic model of aerostatic spindle including the journal and thrust bearings. Reynolds equations are used to model the dynamics of a 4-degree-of-freedom (DOF) aerostatic journal bearing and a 3-DOF aerostatic thrust bearing. Finite element model of the spindle shaft is developed based on the Timoshenko
Jianghai Shi, Hongrui Cao, Naresh Kumar Maroju, Xiaoliang Jin   +3 more
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Milling Cutter Wear Monitoring Using Spindle Shaft Vibration

Journal of Manufacturing Science and Engineering, 1997
With the intent of continuously monitoring cutting tool condition in intermittent machining operations in a benign manner, a noncontacting measurement system was assembled to measure spindle shaft torsional vibration. Spindle vibration was measured using an optical system and analysis of it in the frequency domain resulted in a measure of spectral ...
Seoggwan Kim, B. E. Klamecki
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Experimental investigation into rotating loop thermosyphons for cooling shafts of motorized spindles

Heat and Mass Transfer, 2020
Shaft cooling using loop thermosyphons is an ideal method for cooling motorized spindles. To investigate this application, it was necessary to investigate the heat transfer performance of loop thermosyphons while in a state of rotation. This paper describes cooling a shaft with a set of loop thermosyphons as its cooling structures. These thermosyphons’
Fajing Li, Jianmin Gao, Xiaojun Shi, Zhifeng Wang, Daoyong Wang   +4 more
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Dynamic characteristics of spiral groove bearing spindles: comparison between rotating‐shaft and fixed‐shaft designs

Tribotest, 2005
AbstractIn this paper, two types of spiral groove bearing (SGB) spindles, a rotating‐shaft spindle and a fixed‐shaft spindle, are analysed, and the dynamic characteristics of these two types of spindles are tested and compared. The effects of lubricants on the dynamic characteristics and power consumption of the spindles are considered.
Q. Zou, Y. Tian, S. Wen, D. Konno
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Modeling and Validation of Spindle Shaft Followed by Goal Driven Optimization

2018
The spindle bearing system is critical component in any machining center due to its complexity and it directly affects design or selection of components. Fail-safe design is traditional design philosophy of the machine centers which leads to over-sized machine tool design including spindle bearing system.
Kahane Roshan, Somnath Chattopadhyaya, Shrikant Bhise, Dattatraya Parle   +3 more
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Dynamic characteristics of a HDD spindle system due to imperfect roundness of shaft

2009 Asia-Pacific Magnetic Recording Conference, 2009
This research proposes a modified Reynolds equation for the coupled journal and thrust FDBs to include the variable film thickness due to the imperfect roundness of a rotating shaft. Finite element method is used to solve the Reynolds equation to determine pressure, reaction force and friction torque.
G. H. Sang, K.Y. Koak, H. W. Kim, K. M. Jung   +3 more
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Vibration of rotating-shaft HDD spindle motors with flexible stationary parts

Digest of the Asia-Pacific Magnetic Recording Conference, 2003
Demonstrates an accurate mathematical model predicting forced vibration of rotating-shaft hard disk drive spindle motors with flexible stationary parts. The mathematical model consists of three parts: a rotating part, a stationary part, and bearings. The rotating part includes a flexible hub, a flexible shaft press-fit into the hub, and N elastic disks
null Chaw-Wu Tseng, null Jr-Yi Shen, I.Y. Shen   +2 more
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Vibration Prediction of a Spindle Shaft and Bearing Fitting Assembly Design using Fuzzy Logic

2020 IEEE 7th International Conference on Industrial Engineering and Applications (ICIEA), 2020
This paper proposes Fuzzy Logic for Assembly parts for making a decision and selecting effective fitting for spindle shaft and bearing for each stage of assembly. Multi-criteria decision making is concerned with interference fits, material hardness, surface roughness and spindle force.
Noppachai Saivaew, Suthep Butdee
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Stepped spindle motor shaft to reduce disk drive acoustic noise

The Journal of the Acoustical Society of America, 1998
A spindle motor shaft having variable geometrical features for adjusting the torsion mode frequency of the shaft/stator assembly. The variable geometric features allow the torsion mode frequency to be tuned away from the driving force frequency of the motor.
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