? What are the noise and influence of gears on the gearbox? - Yancheng XINLAN Precision Machinery Co., Ltd.

Yancheng XINLAN Precision Machinery Co., Ltd.

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What are the noise and influence of gears on the gearbox?

Source: http://www.agricultural-gearbox.top/news627131.html时间:2021-06-05 10:47:00

The influence of gear error on noise.Reducing and controlling gearbox noise is the basis for reducing gearbox motor noise.In order to reduce gear noise, it is necessary to consider both structural design and gear accuracy.

1. The structural design requirements of low-noise gears.Gearbox customizationThe influence of structural design on noise is very important.The ideal design is to increase the bending strength of the gear teeth as much as possible, choose a larger modification coefficient and a suitable helix angle, and increase the meshing coefficient, so as to achieve the purpose of reducing noise.

2.Gearbox customizationThe effect of accuracy on noise.For standard series gearbox motors, the manufacturing accuracy of gears determines its noise value.The main function of the gears of the gearbox customized motor is to transmit speed and torque, so the level of working stability is the main requirement for the precision of its gear manufacturing.Gears with higher working stability levels not only have a long service life, but also have less impact and vibration during transmission. Therefore, limiting the working stability error of the gearbox customization is the key to reducing gear noise.

(2) The influence of working stability accuracy on noise.The accuracy of the gearbox's customized work stability is to limit the change of the gearbox's instantaneous speed ratio. The error is that multiple rotation angle errors occur every time the gearbox rotates, causing the gearbox to collide and vibrate during the meshing process, resulting in gear noise. It is a high-frequency impact sound.For a gearbox customization, the factors that affect its working stability are the base pitch error and the involute tooth profile error.

(3) The influence of gearbox customized contact accuracy on noise.The comprehensive index for evaluating gear contact accuracy is the contact point. A gearbox with poor contact will make a lot of noise.The reasons for poor gear contact are: tooth orientation error affects tooth length contact, base pitch deviation and tooth profile error affect tooth height contact.

(4) The influence of gearbox customized motion accuracy on noise.The movement accuracy of the gearbox refers to the accuracy of the transmission movement, that is, the error of each rotation angle of the gearbox cannot exceed a certain limit.Because the gear movement accuracy is a large period error (gear rotates one round), the gear rotates one round, the cumulative error of the cleanliness caused by the radial runout of the ring gear will produce low-frequency noise, but when the cumulative error of the pitch increases, it will cause the gear When the meshing impact and angular velocity change, the noise will increase significantly at this time, making a "rumble" sound.

(5) The influence of wheel eccentricity on noise.Unbalanced centrifugal force is produced when gears with eccentric wheels are meshing, which is a kind of alternating stress, which will cause the gear train to vibrate and generate noise.Therefore, it is necessary to detect the dynamic balance of the reducer wheel.