The noise control of Roots blower is an important engineering issue, and the following are some effective control methods:
1、 Source control
1. Choose a low-noise model:
When choosing a Roots blower, priority should be given to low-noise models and specifications.
Some manufacturers provide noise test data that can be used to compare the noise levels of different models of fans.
2. Special Design:
Choose fans with double-layer shells or made of noise reducing materials to reduce noise generation.
3. Adjust operating parameters:
By adjusting the operating parameters such as the speed and inlet/outlet airflow velocity of the Roots blower, the generation and propagation of noise can be affected.
Reasonably adjusting these parameters can help reduce the noise level of Roots blowers.
2、 Control of transmission routes
1. Install soundproof cover:
Install soundproof enclosures around the Roots blower and establish physical barriers to isolate noise propagation.
The soundproof enclosure should use sound-absorbing materials and multi-layer structure, and consider ventilation and heat dissipation requirements.
The size of the soundproof cover should be configured according to the size of the fan model and motor model to ensure sound insulation effect.
2. Vibration and structural damping:
Use shock-absorbing materials, shock absorbers or suspension devices and other shock-absorbing measures to reduce the vibration and structural conduction of the fan, thereby reducing the noise level.
3. Sound absorption of air inlet and outlet and pipeline:
Sound absorbing materials, such as sound absorbing foam and cotton, shall be used on the air inlet and outlet and pipes of Roots blower to absorb noise energy and reduce noise transmission and reflection.
4. Duct treatment:
Thicken the inner wall of the air duct to increase its stiffness and reduce the regenerated noise caused by vibration.
Flexible treatment of bends or joints in air ducts to reduce noise caused by airflow impact.
Reduce wind speed and increase pipe diameter to reduce airflow noise.
Add damping materials on the outer wall of the air duct to further isolate noise propagation.
3、 Post maintenance and management
1. Regular maintenance and inspection:
Regularly maintain and inspect the Roots blower to ensure that the equipment is in good working condition.
Clean and replace the filter screen, fan blades, and other components of the fan to reduce noise generation.
2. Improve assembly accuracy:
Improve the assembly accuracy of the equipment and replace vulnerable parts such as ball bearings to reduce noise caused by improper assembly or component wear.
3. Establish a soundproof duty room:
Set up enclosure structures around the unit, such as thick materials such as brick walls or aerated concrete blocks, to effectively block the transmission of fan noise.
Set up an independent machine room for the wind turbine and establish a duty room with good sound insulation inside the room to protect the hearing health of the operators.
4. Silencer installation:
Install mufflers on the intake and exhaust ducts of the fan, with built-in silencing inserts to effectively reduce airflow noise.
Choose the appropriate type and design of muffler to ensure noise reduction effect.
4、 Case sharing
A certain building materials company has adopted a customized installation of Roots blower soundproof cover for noise reduction. This plan is customized with soundproof enclosures based on the size, shape, and working environment of the Roots blower, using high-performance soundproof and sound-absorbing materials to ensure good noise reduction effect. At the same time, ventilation and heat dissipation ports were reserved in the design of the soundproof enclosure, and fans were installed for forced ventilation, ensuring that the fans operate normally while reducing noise. After the customized installation of the Roots blower soundproof cover, the noise of the Roots blower of the building materials company has been effectively controlled. The on-site test results show that the noise intensity has been reduced by more than 30 decibels, meeting the relevant national standards.
In summary, the noise control of Roots blowers requires comprehensive consideration of multiple aspects such as source control, transmission pathway control, and later maintenance and management. By combining various measures, the noise pollution of Roots blowers can be effectively reduced, the working environment can be improved, and the health of operators can be protected.
