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Home » Keywords » helical

Items Tagged with 'helical'

ARTICLES

Design and Optimization of a Hybrid Vehicle Transmission

May 1, 2019
Massimiliano Turci
The paper is not the proof of a discovery, but it is the description of a method: the optimization of the microgeometry for cylindrical gears. The method has been applied and described on some transmissions with helical gears and compound epicyclic, used on different hybrid vehicles. However, the method is also valid for industrial gearboxes.
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Relationship between Misalignment and Transmission Error in Cross- Axes Helical Gear Assemblies

March 1, 2019
Question: I am a gear engineer for a motor manufacturer in China. I am writing about noise generated from cross-helical gear assembly error. I want to learn the relationship between the misalignment (center distance change and cross-angle shift) and transmission error. It is better under the loading and theory conditions. What is the trend of cross-helical gear development (use ZI worm and involute helical gear, point contact)?
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Prediction of Dynamic Factors for Helical Gears in a High-Speed Multibody Gearbox System

May 1, 2018
Accurate prediction of gear dynamic factors (also known as Kv factors) is necessary to be able to predict the fatigue life of gears. Standards-based calculations of gear dynamic factors have some limitations. In this paper we use a multibody dynamic model, with all 6 degrees of freedom (DOF) of a high-speed gearbox to calculate gear dynamic factors. The findings from this paper will help engineers to understand numerous factors that influence the prediction of dynamic factors and will help them to design more reliable gears.
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FE-Based Approaches for Tip Relief Design

August 1, 2017
The deformation of the gear teeth due to load conditions may cause premature tooth meshing. This irregular tooth contact causes increased stress on the tooth flank. These adverse effects can be avoided by using defined flank modifications, designed by means of FE-based tooth contact analysis.
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A Proposed Pre-Finish Cylindrical Gear Quality Standard

September 1, 2016
Peter E. Chapin
This proposed standard would not make any recommendations regarding the required quality for any application. The intent is to establish standard pre-finish quality classes for typical finishing operations, which only include the inspection elements that are important to properly evaluate pre-finish gear quality as it applies to the finishing operation. It would be the responsibility of the manufacturing/process engineer, quality engineer, or other responsible individual to establish the required pre-finish quality class for their application.
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Optimal Modifications on Helical Gears for Good Load Distribution and Minimal Wear

June 1, 2015
Helical gear teeth are affected by cratering wear — particularly in the regions of low oil film thicknesses, high flank pressures and high sliding speeds. The greatest wear occurs on the pinion — in the area of negative specific sliding. Here the tooth tip radius of the driven gear makes contact with the flank of the driving gear with maximum sliding speed and pressure.
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Predicted Scuffing Risk to Spur and Helical Gears in Commercial Vehicle Transmissions

November 1, 2012
AGMA925–A03 scuffing risk predictions for a series of spur and helical gear sets of transmissions used in commercial vehicles ranging from SAE Class 3 through Class 8.
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Development of Conical Involute Gears (Beveloids) for Vehicle Transmissions

November 1, 2005
Conical involute gears (beveloids) are used in transmissions with intersecting or skewed axes and for backlash-free transmissions with parallel axes.
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Tooth Flank Corrections of Wide Face Width Helical Gears that Account for Shaft Deflections

January 1, 2005
This paper discusses the influence of tip relief, root relief, load modification, end relief and their combinations on gear stresses and transmission errors due to shaft deflections.
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New Approach to Computerized Design of Spur and Helical Gears

January 1, 2005
Applying "Dynamic Block Contours" allows the designer to predict gear quality at the earliest stage of the design process.
Read More
More Articles Tagged with 'helical'
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