Lightweight Design and Dynamics Analysis of ZYL-15000D Directional Drill Reducer

Table 2

Comparison of reducer parameters before and after optimization.

Parameters	Results before optimization					Results after optimization
	Sun gear	Ring gear	Planetary gear	Helical gear	Drive gear	Sun gear	Ring gear	Planetary gear	Helical gear	Drive gear
m (mm)	3.5	3.5	3.5	7	7	3	3	3	5	5
z	17	67	25	19	69	23	57	17	21	59
b (mm)	41	41	41	85	85	68	68	68	103	103
Material	20CrNi4	42CrMo	20CrNi4	20CrNi4	20CrNi4	20CrMnTi	42CrMo	20CrMnTi	20CrNi4	20CrNi4
Volume (mm^3)	18945724.2					9546848.15
Volume decrease ratio	49.6%