The noise of the reducer is generally due to the friction of the gears, the collision of the gears, or the vibration during the operation. The noise of the reducer is related to its own structure. Among them, the most closely related is the design method of the gear and the machining accuracy of the gear. Specifically, first of all, in the operation of gears, the planetary gear and the sun gear have a key role. During the operation of the gear, the ring gear meshes, but the continuous impact causes the gear to generate meshing frequency, and in the case of being forced, the forced vibration "1" is realized. Among them, the meshing frequency of the gear, FZ= nZ/60, from this formula, we know that when the speed of the gear is high, the degree of engagement is also increased, and the noise is also reduced; secondly, the machining accuracy of the gear and the roughness of the surface are also the main reasons for noise. In the processing of gears, it is necessary to start from these two aspects to strengthen the processing of gear precision.

Finally, the friction between the gears and the gears keeps running, the gears vibrate, and the noise comes from this. Machining accuracy is a decisive factor in determining the noise value.

The main function of the gear of the reducer is to transmit the rotational speed and torque, so the machining accuracy of the gear requires the gear to be stable. Gears with higher stability, on the one hand, prolong their service life. And during the transmission process, the impact and vibration are also effectively reduced, and the noise is also reduced.

The influence of gear conditions on the noise level

Based on the principle of gear operation of the reducer, we can effectively combine the planetary structure to achieve statistical and analytical exploration of various types of reducers. Obviously, the noise of the reducer is mainly generated by gear meshing. If we optimize the gear parameters. The purpose of reducing the noise of the reducer can be achieved.

1. Influence of accuracy

In the JJHT accuracy, the grade determines the performance of the gear. During the meshing process, the amount of noise generated is also determined by this. When designing the gears of the reducer, the designer determines the more economical and practical gears and selects the machining accuracy level from the point of view of cost performance. In this way, the influence of the gear machining accuracy level on the noise level is ignored. After experimental research, gears with high machining accuracy are much less noisy than those with low machining accuracy. Therefore, if conditions permit, high-precision gear processing can be selected to reduce gear noise.

2. Structural influence

When designing reducer gears, when the width of the gears increases, the unit load per gear decreases at constant torque. At this time, the gear overlap is increased, so the gear deformation is reduced, thereby improving the gear transmission. Noise is then reduced. A German mechanical design expert Oppaz said: Under certain conditions, when the torque is constant, the noise generated by the large tooth width is smaller than that of the small tooth width. The small pitch of the gears can ensure multi-gear contact.