For the calculation of heavy load large module gear and rack drive, there are many literature research calculation methods, some use integral method, some use mapping function method. In the calculation method of gear root bending stress, the bending section is more accurate than the tooth root stress calculated...
The gear rack with large module and heavy load is not suitable for the conventional hobbing and slotting processing method. For small gears, the milling process is usually designed according to the tooth profile, and for racks, CNC cutting or casting is adopted according to the tooth profile. In...
With the rapid development of China’s economy, mining machinery, engineering machinery, marine engineering equipment and other heavy machinery and equipment are widely used in energy, marine, transportation, metallurgy and other fields. Due to the simple structure, direct transmission and other characteristics of heavy-duty gear and rack transmission, it has...
Generally, the models used in simulation analysis are simplified, and it is impossible to fully consider all factors; From the idea of control variable method, highlight the factors that need to be studied and ignore other factors in the research. Therefore, there are defects where there are innovations. In...
Based on linear elastic fracture mechanics, the crack propagation and life of spur gear root are studied by using the joint simulation technology of ANSYS and FRANC3D. The main conclusions are as follows. (1) At the beginning, the research status of fracture mechanics is introduced, and the research status...
Previously, we used the joint simulation method of ANSYS and FRANC3D to carry out the static analysis of the root crack under three different distributed loads, the crack propagation simulation of spur gear and the calculation of its life. We still analyzed the influence of different positions of the...
18CrNiMo7-6 belongs to low carbon and low alloy carburized steel. It is mainly used to manufacture bevel gears of wind power transmission, electric locomotives of heavy-duty trains, large modulus bevel gears, heavy-duty bevel gears and other parts. The bevel gear shaft is prone to cracking in the process of...
Considering the symmetry of teeth in spur gears, in order to reduce the amount of calculation, one single tooth is still cut as the research object. The material parameters and tooth profile of the semi elliptical flake crack are the same as before. In the static analysis, it can...
The factors affecting crack growth studied by ZHY gear senior engineer team, such as stress ratio, corrosion environment, crack body size and initial crack size, are introduced. When studying the fatigue life and crack propagation law of pressure vessel, the influence of long short axis ratio of semi elliptical...
Within the range of elastic mechanics, Paris gives the fatigue crack growth rate of spur gear expressed by the formula, and deforms the formula to obtain: By integrating both sides of the formula at the same time, the formula for calculating the fatigue crack propagation life of spur gear...