Fatigue pitting caused by the friction between the meshing surfaces of spur gears is one of the main failure forms of spur gear transmission system. The initiation and propagation of micro cracks on the meshing surface is the inducement of fatigue pitting. The research shows that the life of...
According to the theory of elastohydrodynamic lubrication, the lubricant entering into the crack will form a certain pressure inside the crack to force the crack to expand forward, which is equal to the elastohydrodynamic lubrication pressure at the crack entrance. Under the Hertz pressure distribution, some studies have shown...
The gear tooth root dynamic strain measurement experiment is carried out on an industrial standard gearbox, which is installed on an electric closed transmission test bench. The whole test bench is shown in Figure 1. The gearbox test bench consists of two 45KW Siemens Servo Motors. Motor 1 is...
The Coulomb friction model with time-varying friction coefficient is given and introduced into the dynamic model of gear system, in which μ AVG is the average friction coefficient of tooth surface. The friction coefficient of gear tooth surface is related to surface roughness, normal load per unit length of...
In the tooth surface pitting fault simulation model, it is assumed that all the centers of pitting are distributed on the pitch line of driven gear tooth surface, so the distance from the center of pitting to the tooth root is a fixed value. When the degree of gear...
In this experiment, the tooth surface pitting only occurs on one tooth surface of the driven gear, and the tooth surface pitting mainly concentrates near the pitch line of the tooth surface. The experimental tooth surface pitting fault is shown in Fig. 1. In order to facilitate the following...
When there is pitting on the gear surface, the pitting will reduce the time-varying meshing stiffness and the sliding friction of the gear. Therefore, there are some problems to be solved: in the early stage of small pitting failure, is the impact on the dynamic response of gear system...
The gear pitting failure is studied experimentally. Tan CK et al. Accelerated the occurrence of gear pitting failure by using lubricating oil with low wear resistance. The experimental results show that with the increase of gearbox running time, the pitting fault will extend to the adjacent tooth surface, and...
The tooth surface pitting fault is a common failure form of gear system. In the modeling of gear pitting fault, there are three kinds of pitting fault models: rectangular pitting fault, elliptical pitting fault and circular pitting fault. A single rectangular tooth pitting fault model is established on the...
In the study of gear tooth surface pitting fault, the main shapes of pitting corrosion are rectangular pitting, elliptical pitting and circular pitting. In this paper, the gear pitting model is circular pitting, and the single circular pitting fault tooth is shown in the red dotted line in Fig....