Abstract. Based on the space curve meshing equation, a novel helical gear mechanism with improved geometry is presented. First, equations of theoretical contact curves were derived based theory. Then, tooth surfaces concave–convex form constructed, depending curves. The profiles as corrected by predestining designed transmission errors. effect center distance error errors was studied, and effec...

Gear wear is a common fault that occurs in gear transmission system degrades the operating efficiency and may cause other catastrophic failures such as tooth breakage fatigue. The progressive of helical its influences on vibration responses are rarely investigated due to combined effects complicated lubrication state time-varying characteristic. To fill this gap, numerical study was put forward...