Influence of Pitch Error on Vibration, Bifurcation, and Chaos Characteristics of the Helical Gear Pair System

Table 1

Main parameters of helical gear pair.

Parameter	Driving gear	Driven gear
Number of teeth z	21	38
Module mn (mm)	2.166
Pressure angle αn (°)	20
Helix angle β (°)	20	–20
Contact ratio εγ	2.7573
Face width B (mm)	15
Rotational speed n (rpm)	2000	1105.26
Accuracy/level	7	7
Material	45	45