Transmission error and meshing impact of Helical Gears Considering tooth surface friction

Transmission error is an important excitation that causes the vibration and noise of helical gears. It is a parameter that integrates design and manufacturing factors. It is the main excitation source of vibration and noise in the dynamic characteristics of helical gears. It plays an important role in characterizing the dynamic load and the failure of helical gears. From the point of view of design, the tooth modification of low noise helical gear also directly depends on the change of transmission error of helical gear. The influence of transmission error should also be fully considered in the modification design of narrow face helical gears used in the automotive industry.

On the basis of considering the time-varying meshing stiffness and meshing deformation of tooth surface friction calculation, based on the overall error theory of helical gear pair and considering the above factors, the dynamic equation of helical gear is constructed, and the variation laws of transmission error, maximum meshing force and maximum meshing acceleration are analyzed; Considering the meshing deformation caused by tooth surface friction, this paper analyzes the influence of pitch error, pitch error and helical gear accuracy grade on the vibration and noise of helical gear in the meshing impact of helical gear caused by transmission error, so as to provide reference for the modification of helical gear and vibration and noise reduction.

On the basis of considering the overall error, tooth friction and time-varying meshing stiffness, the dynamic equation of helical gear is constructed, and the dynamic characteristics of transmission error and meshing impact caused by transmission error are analyzed.

  1. at different speeds, the effects of input torque and damping on the transmission error, maximum meshing force and dynamic factor of helical gears are analyzed. The error excitation in heavy-duty helical gears has little effect on the dynamic response, while the error excitation in high-speed helical gears has a greater effect on the dynamic response, and the damping has an obvious effect on reducing the dynamic response caused by error excitation.
  2. in the helical gear meshing impact caused by transmission error, the base pitch error, cumulative deviation of tooth pitch and the accuracy grade of helical gear reflected by tooth profile error have a great impact on the vibration and noise generated by helical gear meshing impact. The impact of each error on the vibration and noise is quantified to provide a theoretical basis for helical gear design, manufacturing and installation.
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