Causes and Treatment of Noise of Gearboxes
Aug 31, 2018

Causes of noise for gearboxes

   Noise generation of reducer is mainly due to friction, vibration and collision of transmission gears. How to reduce noise effectively and make it more in line with environmental protection requirements is also a key research topic at home and abroad. Reducing gear transmission noise has become an important research topic in the industry. Many scholars at home and abroad regard the change of gear meshing stiffness as the main factor of dynamic load, vibration and noise. The method of modification is used to minimize the dynamic load and speed fluctuation in order to reduce noise. This method is proved to be a more effective method in practice. But in this way, there is a need for modification equipment in the process. Small and medium-sized factories often fail to implement them.

    After years of research, a gear design method is proposed, which can reduce or avoid the impact of meshing pitch by optimizing gear parameters, such as modification coefficient, tooth height coefficient, pressure angle and center distance, so as to minimize the impact speed of meshing, and the ratio of impact speed of meshing to impact speed of meshing is in a certain numerical range. Gear noise of low speed reducer. For the noise problem of the reducer, it can also be a Metro super sealant or lubricant. It is an excellent additive for gearboxes. It can form a film of inert material on the parts, thereby reducing friction, gear noise and leakage.


Treatment of noise for gearboxes

   One of the ways to reduce the noise of gearboxes is to install.

1, Vibration reduction and blocking measures

When the reducer is installed, the resonance between the fuselage and the foundation support and the connecting parts should be avoided as far as possible, and the noise should be produced. One or more gears often resonate in a certain speed range within the reducer. Except for design reasons, the gears resonate with the gears installed without empty test. And take corresponding measures of vibration reduction or blocking is directly related. Some reducers requiring low transmission noise and vibration should choose high toughness and high damping base materials to reduce the occurrence of noise and vibration.

 2, Parts geometric accuracy adjustment

 Because the geometric accuracy does not meet the requirements of the standard, the components of the reducer resonance, resulting in noise, which should be in the improvement of installation process, increase tooling, to ensure that the overall quality of assembly personnel has a direct relationship.

 3. Loose parts

The looseness of individual parts (such as bearing preloading mechanism, shafting positioning mechanism, etc.) during installation leads to inaccurate positioning of the system, abnormal position meshing, shafting movement, vibration and noise. This series should proceed from the design structure, try to ensure that the linkage of institutions is stable, using a variety of connection methods.

 4, Transmission parts damage

When installing, the transmission parts are damaged due to improper operation, resulting in inaccurate motion or motion instability of the system; high-speed moving parts are damaged resulting in oil film vibration; artificially caused dynamic imbalance of moving parts; all produce vibration and noise. These reasons must be paid attention to and avoided in the installation process. The damaged parts which can not be repaired must be replaced to ensure that the system has a stable noise level.

Two ways to reduce the noise of gearboxes: Maintenance

  Correct use and maintenance of the reducer can not reduce the noise level of the system and ensure the transmission accuracy, but it can prevent the deterioration of its indicators and increase its service life.

1, Internal cleaning

The cleaning of the internal parts of the reducer is the basic condition to ensure its normal operation. Any impurities and dirt will affect and damage the transmission system, resulting in noise generation.

2, Working temperature

Guarantee the normal working temperature of the reducer, avoid the deformation of parts due to excessive temperature rise, ensure the normal meshing of gears, thereby preventing the increase of noise.

3, Timely lubrication and proper use of oil

Unreasonable lubrication and incorrect use of grease will cause immeasurable damage to reducer. At high speed, the friction of gear tooth surface will produce a lot of heat energy, and improper lubrication will lead to damage of gear teeth, affect the accuracy, and increase the noise. Proper clearance (clearance between non-working faces of meshing gear teeth) is required in design to compensate for thermal deformation and store lubricating grease. The correct use and selection of lubricating grease can ensure the safe and effective operation of the system, delay the deterioration trend and stabilize the noise level.

4, The correct use of gearboxes

Correct use of the reducer can minimize the damage and damage of parts and ensure a stable noise level. The noise of the reducer will increase with the increase of the load, so it should be used in the normal load range.

*For more product parameters, size and price, please contact Hangzhou Starred-River Machinery Co., Ltd.




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