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

Table 1

Original design parameters of reducer.

Parameter	Gear
	Sun gear a	Planetary gear c	Ring gear b	Helical gear d	Drive gear e
mn	3.5	3.5	3.5	7	7
Z	17	25	67	19	69
B	41	41	41	85	85
Material	20CrNi4	20CrNi4	42CrMo	20CrNi4	20CrNi4