Influence factors on bulk temperature field of gear

Abstract

The convective heat transfer coefficient of different tooth surfaces and the friction heat flux were identified based on the theory of tribology, heat transfer, and gear meshing theory. A more accurate parametric model of finite element thermal analysis of a single tooth was established by using APDL and the more accurate bulk temperature field of the gear was obtained. The factors that affect the bulk temperature field of gears were also analyzed, and the influence mechanism of each factor was carried out. The results show that high-pressure angle and tooth profile modification cannot only effectively reduce the bulk temperature of the gear, but also benefits the distribution of the bulk temperature. Long-addendum gear is beneficial to the distribution of the bulk temperature. The bulk temperature is proportional to the initial temperature of the lubricating oil. The variations of the equivalent curvature radius, the stiffness and the load sharing ratio of the meshing point are the ultimate cause of the change of the bulk temperature. The results of this paper can provide a more accurate and practical method for obtaining the bulk temperature of the gear, and it also can provide a theoretical basis and method to improve the thermal behavior of gears.

A 2D finite element based approach to predict the temperature field in polymer spur gear transmissions

“…6b shows a contour plot representing the calculated heat flux function for the same case of study. According to previous works [14,20], the heat flux function is calculated considering that 95% of the dissipated frictional energy is converted into heat (represented by parameter λ in Eq. 10).…”

“…Many authors have relied on analytical methods to solve the contact problem when determining the heat flux function [13,14,17,20]. For a given contact position, these methods determine the theoretical contact point through an unloaded tooth contact analysis (U-TCA) of the transmission.…”

“…Each surface film condition is characterized by the environment temperature T env and a heat transfer coefficient (h A , h B and h C , respectively). Several methods for the calculation of the heat transfer coefficients can be found in the literature, and choosing one or another depends mostly on whether the transmission is operating in lubricated [13,14,20] or non-lubricated [6,9,18] conditions.…”

“…Following these ideas, Patir [11] and Anifantis [12] determined the temperature of metallic gears in running conditions through a thermal analysis of a two-dimensional finite element model of the transmission. Long [13], Luo [14] and Li [15] developed three-dimensional thermal finite element models of metallic gear transmissions and conducted parametric studies of the variation of the temperature of the gears. Shi [16] used a three-dimensional thermal finite element model to analyze the bulk and flash temperature of a locomotive traction gear.…”

Investigation of the thermal stiffness and thermal tooth profile modification of spur gears

“…More information on the calculation process of the bulk temperature field of the gear can be found in Ref. [26]. For the research objects in Table 1, the bulk temperatures of the pinion and gear were obtained, as shown in Fig.…”