Replace C with CEHL γ And substitute it into the formula to obtain the maximum modification amount of the tooth profile based on the stiffness of the spur gear elastohydrodynamic friction pair Δ The calculation formula for max (EHL) is:
The corresponding tooth profile modification curve equation is:
The formula for calculating the modification length is:
The formula has formed a new three elements of tooth profile modification based on the stiffness of spur gear elastohydrodynamic friction pairs.