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Simply Is
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I'm designing a 2-stage gearbox for a project at school (15:1 ratio, must transmit 20 hp, for a full-time 10-year minimum life).
I've come up with 2 basic gear combos for my layout:
1. 16,80,24,72
2. 16,80,16,48
I've done all the calculations for each layout such as making sure that the required hp is transmittable through each gear (using that as a basis for selecting stock gear size and material) for infinite life, and looking at the weight balance / volume aspects for the most efficient design possible.
What I'm having trouble with is understanding the whole interference thing.
I see with 20 degrees you need to have a minimum of 16 teeth on the smallest gear and I'm okay grasping that.
But in looking at the maximum teeth for the larger gear, given a particular smaller gear teeth number, I'm having trouble understanding that.
I put an equation into excel to calculate it for me, and for 16 I come up with a max number of teeth for the larger gear to be 101, so I know I'm okay with the 16,80 combination. But for 24, I come up with a max number of teeth for the larger gear to be -39.
Does this mean that the 24/72 combination will experience interference, wearing out eventually?
Thank you for any replies.
I've come up with 2 basic gear combos for my layout:
1. 16,80,24,72
2. 16,80,16,48
I've done all the calculations for each layout such as making sure that the required hp is transmittable through each gear (using that as a basis for selecting stock gear size and material) for infinite life, and looking at the weight balance / volume aspects for the most efficient design possible.
What I'm having trouble with is understanding the whole interference thing.
I see with 20 degrees you need to have a minimum of 16 teeth on the smallest gear and I'm okay grasping that.
But in looking at the maximum teeth for the larger gear, given a particular smaller gear teeth number, I'm having trouble understanding that.
I put an equation into excel to calculate it for me, and for 16 I come up with a max number of teeth for the larger gear to be 101, so I know I'm okay with the 16,80 combination. But for 24, I come up with a max number of teeth for the larger gear to be -39.
Does this mean that the 24/72 combination will experience interference, wearing out eventually?
Thank you for any replies.
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