Study on tribo-dynamic behaviors of rolling bearing-rotor system based on neural network

Study on TEHL flash temperature of helical gear pair considering profile modification

“…The film thickness of the gear pair can be obtained through: where h 0 represents the central film thickness of the rigid body. The comprehensive elastic deformation, the last term of the above equation, is rapidly solved using the FFT algorithm (Cui et al , 2018; Meng et al , 2021).…”

“…In addition to the above boundary conditions, the temperature distributions of the interfaces between the lubrication film and helical teeth should satisfy the heat flow continuity condition. During the temperature computation process, the film, pinion and gear are regarded as a whole (Cui et al , 2018; Meng et al , 2021).…”

“…After the meshing analysis of the helical gears with the profile modification, the chase-after method and FFT algorithm are applied to accurately and rapidly obtain the TEHL flash temperature (Cui et al , 2018; Meng et al , 2021). The computation domain is set as −4.5 a ≤ x ≤ 2.5 a , −0.5 L ≤ y ≤ 0.5 L and 0 ≤ z ≤ 1.0 h , where L is the contact line length.…”

“…The comprehensive elastic deformation, the last term of the above equation, is rapidly solved using the FFT algorithm (Cui et al, 2018;Meng et al, 2021).…”

“…In doing so, the meshing theory is used to obtain the force, geometry and motion parameters of the gear pair, during which the slicing method is introduced to introduce the profile modification effect through the stiffness analysis. Then, the TEHL theory is used to obtain the flash temperature through the lubrication analysis, in which the temperature distribution and elastic deformation are rapidly calculated through the chase-after and fast Fourier transform (FFT) methods (Cui et al , 2018; Meng et al , 2021), respectively. After that, effects of the tip relief amount, input torque and rotation speed on the flash temperature behavior of the helical gear pair are studied.…”