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cabellos6
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In a two stage reduction gearbox is it possible to have more teeth on the gear pair (helical-parallel axis) of the 2nd stage? I ran through a specification for gear sizes and I am wondering if this is ok.
Dr.D said:The assumption that the input and output shafts are aligned (a reverted train) is an unnecessary design hindrance that can drive the cost up and is not justified except in very special cases where the layout requires this. It is rarely done as a matter of routine.
It is certainly permissible to have a different ratio in one pair versus the other pair; this is the norm. It is important to assure that neither pair involves a pinion with less than the minimum number of teeth to avoid undercutting.
In "the real world" you are given a basic set of criteria (variations are a certainty):ank_gl said:how should we go about finding the true minimum Dr.D?(i am not being sarcastic)
While it is never good practice to grossly oversize, it is also rarely worthwhile to truly minimize in the strictly mathematical sense. Even in aerospace work, where weight is at a premium, this is almost never done. Instead, people use good sense and use the smallest, lightest parts that are practical without seeking a true minimum.
The purpose of having two stages in gear reduction is to increase the overall gear ratio, which allows for a larger speed reduction and greater torque multiplication. This is especially useful in applications where a high amount of torque is needed, such as in heavy machinery or vehicles.
The number of gear teeth in a two-stage reduction gear system is calculated by multiplying the number of teeth in each gear of the first stage by the number of teeth in each gear of the second stage. For example, if the first stage has a gear with 20 teeth and a gear with 30 teeth, and the second stage has a gear with 25 teeth and a gear with 40 teeth, the total number of gear teeth would be (20x30) + (25x40) = 900.
The number of gear teeth in a two-stage reduction gear system is determined by the desired gear ratio, the size and strength of the gears, and the available space for the gears within the system. Other factors may include the type of application and the desired torque and speed output.
The gear ratio in a two-stage reduction gear is directly related to the number of gear teeth. As the number of teeth in the driven gear increases, the gear ratio also increases. This means that a higher number of gear teeth in the two-stage reduction gear will result in a larger speed reduction and greater torque multiplication.
The number of gear teeth in a two-stage reduction gear system can significantly impact the overall efficiency of the system. A higher number of gear teeth can lead to more friction and energy loss, resulting in a lower efficiency. Therefore, it is important to carefully consider the number of gear teeth and their size and placement to optimize the efficiency of the system.