Most blowers in the domestic market have the disadvantages of high speed and high noise. So how can we better solve the noise problem of the fan? Here, the recommended edition of Qingdao Jintaixu Fan recommends several methods for you:
Most blowers in the domestic market have the disadvantages of high speed and high noise. So how can we better solve the noise problem of the fan? Here, the recommended edition of Qingdao Jintaixu Fan recommends several methods for you:
1: When the structure allows, add a little more weight, enhance the aerodynamic load of the cascade, reduce the circumferential speed, use strong forward blades for the fan, and the multi-blade impeller helps to increase the aerodynamic load of the cascade. Under the same wind pressure and wind pressure, the outer circumferential speed of the impeller blade can significantly reduce the noise of the fan.
2: The noise source of the fan is basically caused by the action of the blades on the pulsating power of the air flowing through the fan. It can be considered that there are two discrete frequency noise sources of the fan, one is the blade pulse dynamic noise caused by the aerodynamic interference. The distance between the wind maneuver and the stationary blades is an important factor of the interference noise. One is the propeller-type noise caused by the pressure field of the rotor blade. It is conceivable to apply the damping material to the structural parts and thin-walled parts of the blower. There is a damping factor inside the material, which can effectively reduce structural vibration and reduce the secondary radiation noise of thin-walled parts due to vibration.
3: Adding turbulent fluidization device at the inlet and outlet of the impeller Adding a turbulent fluidization device (metal mesh) at the inlet or outlet of the fan impeller blade can immediately convert the laminar flow boundary layer on the back of the blade into a turbulent boundary layer. , delay the separation of the back layer of the blade back, even without separation, the back edge of the blade is installed on the Internet, and the airflow velocity and pressure gradient after the mesh can be quickly and evenly uniformed. If the mesh is in the vortex zone, the vortex zone can be greatly reduced, which can be further reduced. noise.
The above method can only solve the problem of the moment. In fact, it is necessary to solve the fan noise problem better from the manufacturer itself, design, raw materials, production, and inspection.
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MONEL®
The registered trademark name, Monel, is applied as the prefix name to several corrosion resistant alloys produced by Special Metals Corporation. These alloys are nickel-based and exhibit traits that include high resistance to atmospheric corrosion, salt water, and various acid and alkaline solutions.
Alloys of identical chemical and mechanical properties are available from other manufacturers and offer excellent alternatives to the various Monel® brand alloys.
The corrosion-resistant alloy is widely used in the marine, oil and chemical processing industries.
Monel Availability
Mega Mex supplies Monel 400, K-500 & R-405. Most of these grades are available in the form of plate, sheet, pipe, tubing, fittings, bar, wire and rod.
What are the Characteristics of Monel ?
Good resistance to acids such as hydrofluoric and sulfuric acid
Highly resistant to alkalis
Malleable
Highly corrosion resistant
Stronger than steel
In what Applications are Monel alloys used ?
Pump shafts, oil-well tools, instruments, doctor blades and scrapers, springs, valve trim, fasteners, marine propeller shafts
Marine components
Chemical and hydrocarbon processing equipment
Valves, pumps, shafts, fittings, heat exchangers
Monel Trivia
Monel was discovered by Robert Crooks Stanley who worked for the International Nickel Company in 1901. The new alloy was named in honor of the president of the company, Ambrose Monell.
*Monel® is a registered trademark of Special Metals Corporation group of Companies.
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