DESIGN OF COMPOSIT MESH GEAR BY USING ANSYS

Author’s Name :  SK.Aneefa

Volume 04 Issue 04  Year 2017  ISSN No:  2349-3860  Page no: 13-16

Abstract:

An industrial gearbox is defined as a machine for the majority of drives requiring a reliable life and factor of safety, and with the pitch line velocity of the gears limited to below 25 m/s, as opposed to mass produced gearboxes designed for a specific duty and stressed to the limit, or used for very high speeds etc., e.g. automobile, aerospace, marine gearboxes. A gear box is an mechanical device that is used for speed & torque conversions from prime mover to output shaft. As the speed of shaft increases the torque transmitted decreases and vice versa. To the competent engineer, the design of a gear unit, like any other machine, may seem a fairly easy task. However without experience in this field the designer cannot be expected to cover all aspects of gearbox design. The purpose of this paper is to review the basic design for an industrial gearbox. It should help the researcher not familiar with gear boxes; lay out a reliable working design. And it is intended for the reader to use his own experience in selecting formulae, stress values etc., for gearbox and components. Gear surface temperature has been then investigated in detail through three components: ambient, bulk and flash temperatures. Through extensive experimental investigations and modeling on gear surface temperature variations, a general relation has been built up between gear surface temperature and gear load capacity. The method has been related to test results under different operating ambient temperature and gear geometries. Good agreement has been achieved between the proposed method predictions and experimental test results. Experimental investigation on polymer composite (glass fibre reinforced nylon with PTFE as internal lubricant) gears have also been carried out and two forms of failure have been found, root and pitch fractures.

Keywords:

Bending Stress, Contact Stress, Gear Analysis, ANSYS, Static Load

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