How to improve the transmission efficiency and noise control of gearbox through advanced gear design?
Publish Time: 2025-04-03
At a time when the automotive industry is constantly pursuing high performance and low noise, advanced gear design has become the core element to improve the transmission efficiency and noise control of gearbox.From the perspective of improving transmission efficiency, optimizing gear shape and material is a key measure. The use of high-strength and wear-resistant materials, such as high-strength alloy steel, can not only reduce the mass of gears and reduce the moment of inertia, but also improve the strength and wear resistance of gears, and indirectly improve transmission efficiency. In terms of tooth shape design, complex tooth shape designs such as helical gears and spiral bevel gears can effectively reduce the impact and vibration during meshing and reduce energy loss. At the same time, it is also crucial to optimize the macro parameters of gears, such as module, number of teeth, and pressure angle. Appropriately increasing the module and pressure angle can improve the bearing capacity of gears to a certain extent, but the impact on transmission efficiency needs to be comprehensively considered, and the gear ratio should be reasonably selected to avoid excessive or too small gear ratios to reduce energy loss in transmission. By adjusting parameters such as the displacement coefficient, higher contact accuracy and load distribution uniformity can be achieved to further improve transmission efficiency.In terms of noise control, improving gear accuracy is the top priority. High-precision gears can improve transmission accuracy, stability and load uniformity, thereby reducing noise. Improving the roughness of the gear surface, such as performing tooth trussing or grinding after hobbing, is conducive to reducing the meshing noise of the gear. In addition, gear shaping treatments such as edge trimming and tooth profile modification can improve the gear load capacity, reduce impact, and reduce the meshing noise of the gear. When designing gears, let the number of teeth of a pair of meshing gears be prime numbers to each other, and the transmission ratio is not an integer, so as to avoid the feedback of gear manufacturing errors to the transmission system and cause vibration and noise. Choose a suitable gear helix angle. Generally, the transmission noise of helical gears is lower than that of spur gears. As the helix angle increases, the gear noise will decrease. However, it should be noted that in the case of poor rigidity of the gear shaft, excessive helix angle may aggravate vibration and bearing load capacity, resulting in increased noise.At the same time, advanced manufacturing processes and heat treatment technologies also provide strong support for improving transmission efficiency and noise control. Use advanced CNC machine tools for precision cutting and grinding of gears to ensure that the gears have extremely high dimensional accuracy and surface roughness, reduce sliding friction between gears, and improve meshing efficiency. The gear surface hardness and wear resistance are enhanced through carburizing, quenching, nitriding and other heat treatment processes, and the fatigue resistance and load-bearing capacity of the gear are further improved by using surface strengthening technologies such as laser cladding, electroplating and shot peening.In short, through advanced gear design, comprehensive consideration of factors such as materials, tooth shape, parameters, precision, manufacturing process and heat treatment, the transmission efficiency of the gearbox can be effectively improved, better noise control can be achieved, and new impetus can be injected into the development of the automotive industry.
