The hypoid gear transmission studied consists of a small hypoid gear and a large hypoid gear. Due to the complex shape of hypoid gear, three-dimensional modeling is difficult. Based on the actual machining method of hypoid gear, based on the theory of gear meshing and calculus, the main key parameters of hypoid gear are calculated by using the numerical calculation software MATLAB. The three-dimensional model of large and small hypoid gears is established and assembled by using Pro / E, and the three-dimensional assembly model of hypoid gear transmission system is obtained. The three-dimensional model of hypoid gear transmission system is shown in Figure 1.
According to figure 1, the hypoid gear transmission system studied is mainly composed of a pair of meshing tooth pairs composed of driving small hypoid gear and driven large hypoid gear. Main parameters of hypoid gear transmission system.
The established three-dimensional assembly model of hypoid gear transmission system is saved as the intermediate format x-t and imported into the finite element simulation software ansysworkbench to establish the contact fatigue finite element simulation grid model of hypoid gear transmission system, as shown in Figure 2.
It can be seen from Figure 2 that there are 14054543 elements and 19945768 nodes in the contact fatigue finite element simulation grid model of hypoid gear transmission system. In the contact fatigue finite element simulation model of hypoid gear transmission system, the driving small hypoid gear is loaded at a speed of 2750 R / min, and the driven large hypoid gear is applied with a resistance torque of 2000 nm, a friction factor of 0.1, a contact factor of 1.0 and a maximum penetration of 0.1. The contact characteristics of hypoid gear transmission under the set loading conditions are obtained by simulation calculation. The P-S-N curves of contact characteristics and material characteristics of hypoid gear are imported into the finite element simulation software to obtain the fatigue life of hypoid gear under the meshing condition of contact tooth pair.
