Principles of Machine Operation and Maintenance by Dick Jeffrey

Author:Dick Jeffrey [Jeffrey, Dick]
Language: eng
Format: epub
Tags: Business & Economics, Production & Operations Management, Technology & Engineering, Electrical, Civil, General, Mechanical, Industrial Design, Technical & Manufacturing Industries & Trades
ISBN: 9781135384937
Google: pRfaAAAAQBAJ
Publisher: Routledge
Published: 2013-09-13T00:03:39.768523+00:00

Fig. 7-67 Misalignment of gears.

The uneven wear patterns referred to in the previous section are produced by misalignment and if the condition is allowed to continue then tooth breakage may eventually occur.

Out of mesh

If the gears are set up so that the pitch circles are not touching each other then they can be considered to be out of mesh.

If the centre distance between the gears is too small and there is insufficient backlash then interference occurs and the tip of one tooth tends to dig into the root of the mating tooth and produce excessive wear. This will cause rapid deterioration of gear condition and may result in excessive noise and vibration. If gears are set too far apart the backlash will be excessive and wear will occur close to the tips of the teeth which may even break from the impact. Noise and vibration will also increase due to the large amount of backlash.

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