Results 141 to 150 of about 3,702 (174)

Experimental investigation of single loop thermosyphons utilized in motorized spindle shaft cooling

Applied Thermal Engineering, 2018
Abstract In this paper, a shaft cooling structure of a grinding motorized spindle was designed based on loop thermosyphons. The evaporation and condensation sections of the loop thermosyphons were located on the same tube due to the thermal conductivity of the shaft.
Fajing Li, Xiaojun Shi, Feng Liang
exaly   +2 more sources

Influence of Centrifugal Force on Characteristics of Turbine Shaft for Micro-Spindle for Micro-Cutting

Advanced Materials Research, 2012
The centrifugal force has great influence on characteristics of the turbine shaft. The changes of stress, diameter and natural frequency of the turbine shaft for self-developed micro-spindle for micro-cutting following with the rotational speed were studied by finite element (FE) simulation, which showed that stress, diameter of the turbine shaft and ...
Zhi Xiong Zhou
exaly   +2 more sources

A numerical study on rotating-shaft spindles with nonlinear fluid-dynamic bearings

IEEE Transactions on Magnetics, 2005
The purpose of this paper is to present a numerical model predicting the shock response of a rotating-shaft spindle motor with nonlinear fluid-dynamic bearings (FDBs). The paper consists of three parts. The first part is to modify an existing linear spindle vibration model to include arbitrary FDB nonlinearity.
null Jungkeun Yoon, I.Y. Shen
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source