How do you reduce noise in a gearbox? What is the best way to reduce road noise? firstly, let us know The cause of gear vibration is that as gears are driven, friction and contact occur repeatedly—the generation of noise. For a long time, gear transmission noise has harmed not only the production environment but also the operator’s health. As a result, finding an acceptable approach to reduce gear transmission noise is critical.Let KONIC gearbox give you the professional advises to reduce noise in a gearbox.

The Origins of Gearbox Noise


1 The running vibration speed of the gear is excessive

The gear vibration speed is too fast, because the gear transmission frequency is too fast, causing vibration between the gears. The vibration frequency between the gears is very high. Fast vibration speeds in gear operation will alter vibration frequency and cause noise.


2 Depending on the gear vibration

Load shock Gears form a part of this system when the gear drive is viewed as a vibration spring system. The youngster. When the gear is subjected to varying degrees of load, the frequency of vibration, as well as the direction of twisting, will differ. The majority of them will generate a circumferential vibration force. This, combined with the gears’ handling noise issues, resulted in a smooth and quiet ride. not yelling noise.


3 Noise caused by resonance

Everyone is aware that resonance can cause noise, and that gear transmission is the most common method of production. As for the primary form of production, there will inevitably be resonance in the functioning of the situation. The vibration is generated by the gears’ low stiffness, and the functioning of the gears is caused by the gear transmission. The gear transmission’s resonance is based on the vibration generated by the stiffness. difference of the gear itself and the vibration caused by friction between the gears on the same vibration frequency. The interaction between the two will almost produce resonance, and the noise caused by resonance will appear.


4 A portion of the smoothness of the gear surface is insufficient

As we all know, if the two items are smooth, the vibration caused by mutual friction is modest. Dynamic frequency and high-frequency waves will be small as well, as will the amount of noise generated naturally. However, many gears’ surfaces are overly rough. However, many gear surfaces are rough. resulting in a huge friction surface when rubbing against each other, a high vibration frequency, and a large amount of noise.

damage gearbox


5 Inadequate support for proper lubrication methods

Not only can a good lubricant reduce friction vibration between gears in gear maintenance and noise reduction but so can a good lubricant use method. Not only can a good lubricant minimize friction vibration between gears, but also a good lubricant utilizing method is a vital approach to reduce and decrease noise in gear maintenance and noise reduction. The typical method of lubricant application is to apply more lubricant to the gear surface. It is to minimize friction during operation, although this method has minimal effect on noise reduction. Noise reduction is minimal using this strategy. The use of foreign gear maintenance and noise reduction on the role of lubrication, pay more attention to the lubrication method, that is, fully injected lubricant into the gears.The way, that is, totally injecting oil into the gear internal method, reduces noise.


Top 8 tips for Noise Reduction Techniques

Noise-reduction gears are designed.

In general, the sources of gear transmission noise are ascribed to the load, vibration frequency, and gear ratio. Bearing rotation and wheel friction, As a result, the design of noise-canceling gears should be based on these considerations as well. As a result, we should consider these factors when designing noise-canceling gear.

coarse pitch gearing


1.   Pay attention of Loading 


The load is mostly determined by the gears’ manufacturing weight. Gear selection is based on the product’s ability to endure the weight of production, that is, different products’ weights must be considered. The weights of the gears are suitably changed to prevent some of the gears from being unable to hold the associated weight throughout the transmission operation, resulting in noise-created noise.


2 The vibration frequency

Planetary Concrete Mixer Drive

Some gears pause friction between huge, quick, resulting in vibration speed is too fast, generating noise. In Gear design should pay attention to the pace of gears, that is, within a given time frame to specify the number of weeks it should be completed. Rather than allowing it to rotate too quickly, the number of weeks of operation.


3 Gear rubbing to reduce noise in a gearbox


As previously stated, excessive friction between the gears will result in excessive vibration and large noise. To reduce friction between gears, while selecting gears, strive to choose a smooth appearance of gears, keeping in mind Choose gears with a smooth appearance and low friction; additionally, you can introduce lubricant into the gears to improve performance. The efficient operation of the gears.


4 Bearing rotation to reduce noise in a gearbox


Not only does the designer of the gear bearing design need to be present but so must the inspector of the gear bearing circumference. Supervision. Requirements, the designer of the trial bearing guarantee duration must be able to tolerate the fault in the gear transmission. The difference between the gear’s design and the gear itself projected that there could be an acceptable range of design flaws.


5 Improve the process of gear lubrication to reduce noise in a gearbox

Improve the process of gear lubrication

To begin reducing noise in gear lubrication, the lubricant should not be the primary consideration. Should also produce A new gear lubrication system that saves grease while improving gear efficiency and reducing noise. Although According to research, centrifugal lubrication is one of the most effective ways to effectively reduce gear noise. This indicates that the gearbox is oiled within a certain time frame. The gearbox is inspected within a certain time range, and seriously broken and degraded gears are replaced as soon as possible. Based on this, a small hole is drilled at the bottom of the gears, and the lubricant is injected through the small hole utilizing centrifugal force. On this premise, a small hole at the bottom of the gear is drilled through which the lubrication is fed and the used lubricant waste is eliminated. It is feasible to construct the gears in this manner. This method efficiently makes the gears rub against each other while avoiding the gear transmission noise caused by poor lubrication.


6 The tooth form correction

The tooth form correction

The top of the gear is meshing due to the tooth form mistake, and the meshing accuracy is low. We want to improve the meshing precision. We apply the tooth form adjustment approach to eliminate gear noise, which is also highly effective. First, we apply the red powder to the teeth. Following the meshing research, utilize shaping to correct the meshing point of the gear, ensuring that the meshing point of the gear is distributed as evenly as possible in the indexing. to increase the gears’ meshing precision The transmission precision of the gears is greatly improved when they are carefully mounted. The goal of noise reduction has been met. Furthermore, helical gear transmission is smoother, has less meshing impact, and is less likely to cause resonance. In the same way, spur gear transmission, As a result, switching from spur to helical gear transmission is an essential way for reducing gear transmission noise. From the standpoint of gear design, as long as the gear vibrates during operation, sound waves are formed, which in turn Noise is produced. The noise produced by the gear drive not only has an impact on the working environment but also on the manufacture of particular precision items. Accuracy will also have an impact on the production of some precision items, with specific challenges requiring appropriate noise-reduction methods.


7. Setting Sound Barriers or Enclosures to reduce noise in a gearbox

Sound Barriers

For extreme cases, you can choose acoustic panels that are available for higher frequency noise levels. Panels can be placed around the gearbox to minimize the amount of sound near employees.


We could also install an enclosure around the sound source. The enclosure should be hard-shelled and airtight, with an inner layer made of sound-absorbing material. However, if you use an enclosure, be sure to include ventilation or you may risk overheating the industrial gearbox or other components.


8. Ensure that personnel follows the necessary safety procedures.


When working with noisy equipment, your personnel should also take care. Instruct your personnel to wear ear plugs and other safety equipment wherever possible. Employees should also have frequent hearing tests to see how noise affects their environment. Finally, perform routine testing to ensure that your facility is working safely.


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