Stable and unstable configuration of double helical gear

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SUMMARY

The discussion centers on the stable and unstable configurations of double helical gears, specifically how the alignment of the driving gear and pinion affects performance. A stable configuration occurs when the cave of one gear's "V" tooth drives the arrow of the other, while an unstable configuration is the opposite. The participants debate whether to realign the driving gear or the pinion, noting that misalignment can exacerbate issues during operation. The concept of net force or thrust is clarified as the forces acting on each gear during these configurations.

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  • Understanding of double helical gear mechanics
  • Familiarity with gear alignment principles
  • Knowledge of axial misalignment concepts
  • Basic grasp of force dynamics in mechanical systems
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  • Research double helical gear design principles
  • Learn about gear alignment techniques and tools
  • Study the effects of axial misalignment on gear performance
  • Explore methods for calculating net thrust in gear systems
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Mechanical engineers, gear design specialists, and anyone involved in the maintenance and optimization of gear systems will benefit from this discussion.

hihiip201
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Hi :

according to :https://en.wikipedia.org/wiki/Gear#Helicalthe stable configuration is when the cave in one of the gear's "V" teeth drives the arrow of the other "V".where unstable configuration is when the arrow part of V drives the cave of the other Vso assuming the direction of motion is up

unstable : ^ stable V (how the teeth in contact looks like from above)
my question is : do we want to re allign the driving gear or the pinion? because while the driving gear may re-allign itself in the stable configuraiton, the pinion would tend to crock more to the other direction. and vice versa with unstable configuration.on the wikipage when they say netforce/thrust, I am assuming that are talking about the net force/thrust on each of the gears (or else that would be an internal force)

while one gear is pushed to the left, the other is pushed to the right, which means while one gear is being alligned back into it's desired position, the other is being misallign even more.

like this:
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Last edited:
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oh or maybe they are referring to the other type of axial misalignment?
 

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