Noise Treatment of Powder Machinery
Powder metallurgy gears are important components in mechanical transmission systems that transmit motion and power, and are also widely used transmission components. During the use of powder machinery, the noise of powder metallurgy gears can cause great harm to producers!
Eliminating resonance: Only when powder mechanical resonance occurs, can there be strong noise of over 100 decibels that can be generated due to superposition. The general performance is: strong vibration, low noise, some weak vibration, but high noise; Some have high vibrations and noise. Obviously, by eliminating resonance, the noise will also disappear.
Sound absorbing material: It is also a common and effective sound path treatment method, which uses sound absorbing material to wrap the noise source and powder mechanical pipeline. Due to the fact that noise can propagate over long distances through fluid flow. Therefore, as long as the sound-absorbing material is packaged and thick walled pipes are used, the effectiveness of noise reduction will end there.
We can solve various noises that occur during the production process of powder machinery through these methods.
Eliminate cavitation: cavitation is the main source of fluid dynamic noise. During cavitation, the bubble ruptures and produces high-speed impacts, causing strong turbulence locally and producing cavitation noise. This type of noise has a wide frequency range and produces a grating sound, similar to the sound emitted by fluids containing sand and gravel. Eliminating and reducing cavitation is an effective way to eliminate and reduce noise.
The main motor emits an abnormal sound, the main motor bearing is damaged, and a thyristor in the main motor thyristor rectifier circuit is damaged. It is possible to replace the main motor bearings, check the thyristor rectifier circuit, and replace the thyristor components if necessary.
Sound absorbing material: This is also a common and effective sound path treatment method for powder mechanical noise reduction. Sound absorbing materials can be used to wrap the noise source and pipeline. Due to the long-distance propagation of noise through fluid flow, wherever sound absorbing materials are packaged, thick walled pipes are used, and the effectiveness of noise reduction will also terminate.
The noise inside the circuit mainly comes from self-excitation, power humming, fluctuations in electronic flow in circuit components, and thermal motion of free electrons.
If the ventilation noise cannot be controlled from the perspective of sound source, sound insulation or noise reduction methods should be adopted, and sound-absorbing materials can also be installed near the radial air duct opening of the stator. The sound pressure level of noise is directly proportional to the product of the height and number of ripples on the rolling surface. In addition, the size of radial clearance can also affect noise, reducing radial clearance can reduce noise. However, bearings with small radial clearance are required to be used in casings and end caps with high concentricity between two bearing chambers, and the requirement for rotor coaxiality will also be increased.
Eliminating cavitation: cavitation is the main source of fluid dynamic noise. During cavitation, the rupture of bubbles produces high-speed impacts, resulting in strong turbulence in local areas and generating cavitation noise. A wide frequency range produces a "grid" sound, similar to the sound produced by fluids containing sand and gravel. Eliminating or reducing cavitation is an effective way to eliminate or reduce noise.
For powder machinery, the effective way to deal with noise is to control the noise source, fundamentally eliminate or reduce noise. This requires the purchase of low noise pumps and low noise machinery. If the noise is not very loud, choose
