Design, Analysis and Inspection of Spiral Bevel and Hypoid Gears Using Tooth Contact Analysis Programs PDF Download
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Author: Sandeep Tilak
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
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Author: Sandeep Tilak
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
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Author: Theodore J. Krenzer
Publisher:
ISBN:
Category : Gear teeth
Languages : en
Pages : 12
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Author: Robert F. Handschuh
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
A review of recent progress for the analysis of spiral bevel gears will be described. The foundation of this work relies on the description of the gear geometry of face milled spiral bevel gears via the approach developed by Litvin. This methodology was extended by combining the basic gear design data with the manufactured surfaces using a differential geometry approach, and provides the data necessary for assembling three dimensional finite element models. The finite element models have been utilized to conduct thermal and structural analysis of the gear system. Examples of the methods developed for thermal and structural/contact analysis are presented.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781725000865
Category :
Languages : en
Pages : 32
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Book Description
An analytical method was developed to determine gear tooth surface coordinates of face-milled spiral bevel gears. The method uses the basic gear design parameters in conjunction with the kinematical aspects of spiral bevel gear manufacturing machinery. A computer program, SURFACE, was developed. The computer program calculates the surface coordinates and outputs 3-D model data that can be used for finite element analysis. Development of the modeling method and an example case are presented. This analysis method could also find application for gear inspection and near-net-shape gear forging die design. Handschuh, Robert F. and Litvin, Faydor L. Glenn Research Center NASA-TP-3096, E-5837, NAS 1.60:3096, AVSCOM-TR-91-C-020, AD-A242332 DA PROJ. 1L1-62211-A-47-A; RTOP 505-63-51...
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
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An experimental study to investigate the bending stress in aerospace-quality spiral bevel gears was performed. Tests were conducted in the NASA Lewis Spiral Bevel Gear Test Facility. Multiple teeth on the spiral bevel pinion were instrumented with strain gages and tests were conducted from static (slow roll) to 14400 RPM at power levels to 540kW (720 hp). Effects of changing speed and load on the bending stress were measured. Experimental results are compared to those found by three-dimensional finite element analysis.
Author:
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ISBN:
Category :
Languages : en
Pages : 14
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Book Description
Spiral bevel gears are an important drive system components of rotorcraft (helicopters) currently in use. In this application the spiral bevel gears are required to transmit very high torque at high rotational speed. Available experimental data on the operational characteristics for thermal and structural behavior is relatively small in comparison to that found for parallel axis gears. An ongoing test program has been in place at NASA Glenn Research Center over the last ten years to investigate their operational behavior at operating conditions found in aerospace applications. This paper will summarize the results of the tests conducted on face-milled spiral bevel gears. The data from the pinion member (temperature and stress) were taken at conditions from slow-roll to 14400 rpm and up to 537 kW (720 hp). The results have shown that operating temperature is affected by the location of the lubricating jet with respect to the point it is injected and the operating conditions that are imposed. Also the stress measured from slow-roll to very high rotational speed, at various torque levels, indicated little dynamic affect over the rotational speeds tested.
Author: Faydor L. Litvin
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722618063
Category :
Languages : en
Pages : 52
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Book Description
Face-milled spiral bevel gears with uniform tooth height are considered. An approach is proposed for the design of low-noise and localized bearing contact of such gears. The approach is based on the mismatch of contacting surfaces and permits two types of bearing contact either directed longitudinally or across the surface to be obtained. Conditions to avoid undercutting were determined. A Tooth Contact Analysis (TCA) was developed. This analysis was used to determine the influence of misalignment on meshing and contact of the spiral bevel gears. A numerical example that illustrates the theory developed is provided. Litvin, F. L. and Wang, A. G. Glenn Research Center...
Author: National Aeronautics and Space Adm Nasa
Publisher:
ISBN: 9781723718908
Category :
Languages : en
Pages : 34
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Book Description
An integrated computerized approach for design and stress analysis of low-noise spiral bevel gear drives with adjusted bearing contact has been developed. The computation procedure is an iterative process, requiring four separate steps that provide: (a) a parabolic function of transmission errors that is able to reduce the effect of errors of alignment, and (b) reduction of the shift of bearing contact caused by misalignment. Application of finite element analysis permits the contact and bending stresses to be determined and investigate the formation of the bearing contact. The design of finite element models and boundary conditions is automated and does not require an intermediate CAD computer program. A commercially available finite element analysis computer program with contact capability was used to conduct the stress analysis. The theory developed is illustrated with numerical examples.Litvin, Faydor L. and Fuentes, Alfonso and Mullins, Baxter R. and Woods, RonGlenn Research CenterLOW NOISE; SPIRAL BEVEL GEARS; STRESS ANALYSIS; DESIGN ANALYSIS; MECHANICAL DRIVES; MATHEMATICAL MODELS; BEARINGS; BENDING FATIGUE; BOUNDARY CONDITIONS; MISALIGNMENT; FINITE ELEMENT METHOD; COMPUTER PROGRAMS...
