1. Structural optimization
Lightweight design: Lightweight design of gearbox and other components, optimize structural stiffness, change its inherent characteristics, and avoid resonance frequency.
Optimization of impeller trailing edge sweep angle: By optimizing the impeller trailing edge sweep angle, the undercurrent loss caused by tip gap leakage and the flow separation loss on the impeller trailing edge pressure surface are suppressed, the isentropic efficiency is improved, the working range is widened, and the stability of the air compressor is improved.
2. Sound absorption and sound insulation measures
Absorption and insulation type sound insulation cover: The absorption and insulation type sound insulation cover is adopted. The centrifugal glass wool and perforated plate in its structure absorb medium and high frequency noise, the steel plate layer blocks the propagation of low frequency sound, and the damping coating is added to prevent resonance.
Impedance composite muffler: Impedance composite muffler is installed at the inlet and exhaust vents of the absorption and insulation type sound insulation cover to further reduce noise.
Micro-perforated plate sound absorption structure: The inner wall of the fan casing adopts a micro-perforated plate sound absorption structure, and no filler is added in the middle of the interlayer. The perforation rate of the inner wall is 1% to 3%, the plate thickness is 0.8mm, the aperture is 0.8mm, and the gap between the layers is 50 to 100mm.
3. Liquid spray noise reduction
Liquid spray noise reduction technology: A ring-shaped through hole is set at the exhaust port of the impeller, so that the refrigerant liquid is sprayed into the exhaust port of the compressor through the through hole. The sprayed refrigerant droplets can absorb the sound energy, thereby reducing the exhaust noise of the compressor. Liquid spray noise reduction can reduce the noise of the unit by about 5 dB(A).
4. Mechanical component maintenance
Regular inspection and replacement of bearings: Regularly use a stethoscope or a professional vibration detector to monitor the bearing part. Once abnormal noise is captured, the bearing wear should be checked immediately. For severely worn bearings, they need to be replaced with high-quality products of the same model in a timely manner.
Balanced rotor: Before using the centrifuge each time, be sure to carefully check the appearance of the rotor to check for deformation, damage or foreign matter. Use a balance to accurately weigh the centrifuge tubes and samples to ensure that the weight deviation of the centrifuge tubes in the same rotor is within the allowable range.
5. Installation and environmental optimization
Ensure smooth installation: When installing the centrifuge, use a level to accurately measure the installation table to ensure that the table level meets the requirements. At the same time, tighten the fixing bolts of the installation base. If necessary, a shock-absorbing pad can be placed under the base to reduce vibration and noise during equipment operation.
Avoid environmental resonance: When choosing the installation location of the centrifuge, try to stay away from large mechanical equipment and building structures that may resonate. Resonance can be avoided by changing the installation location of the centrifuge or adjusting the structure of the surrounding environment.
6. Operating specifications
Operate strictly in accordance with the operating procedures: Carefully read and strictly abide by the user manual of the centrifuge, and operate according to the rated speed and working conditions of the equipment. Do not increase the speed at will to avoid damage to the equipment.
Reduce frequent starts and stops: Reasonably arrange experimental plans or production tasks to minimize the number of starts and stops of the centrifuge. When multiple centrifugal experiments or production are required in succession, the speed of the centrifuge can be appropriately reduced during the experiment interval instead of completely stopping the equipment.
