A steady hum and noise emanating from machines and equipment can give you the solace that you are in a running plant that is in production. We are kind of accustomed to the noise and tend to take it in our stride. What we overlook or tend to miss is the source of the noise. When a prime mover like a motor or pump drives a machine it produces vibrations and noise. The machines, flooring and support are all made of metal or rigid materials and will transmit the vibrations to the surroundings and also cause damage to the sensitive parts in the machine.
The resonance phenomenon: All the rigid parts connected to the prime mover in the machine and the supporting structure will begin to vibrate in harmony with the generated vibrations. Each rigid part or supporting structure has its own natural frequency of vibration. When the induced vibration nears the natural frequency the resonance phenomenon is created. If you have done an experiment with the air column and tuning fork during your school days, you will understand the phenomenon better. Resonance produces a loud noise which can be a real pollutant in the work area. While the vibrations are silently damaging the machine, the noise makes the workforce uncomfortable.
Anti-vibration mounting pads: We cannot ignore vibrations and we have to resort to products like anti-vibration mounting pads and anti-vibration mats in order to dampen the vibrations and protect the equipment and machinery. The anti-vibration mounting pad is a product that is specifically suited for machines and equipment. The machine has to be lifted and the feet of the machine have to be kept on the anti-vibration pads. The best part is that the pads have to be simply placed on the shop floor without any anchoring. Hence, the installation process is very simple. The elastomer in the anti-vibration isolation pads is responsible for absorbing the vibrations and dissipating the energy as low-grade heat. The stud in the center of the pad is used to anchor it to the machine feet.
Equipment vibration isolation: Heavy machinery and equipment with large prime movers, like generators and compressors are also mounted on anti-vibration pads. The air compressor mounting pads are designed to take care of both the rotary and reciprocating motions. The selection of the anti-vibration isolation pads has to be made on the basis of the load bearing capacity. The elastomer element can be simple rubber or neoprene depending on the environmental conditions. Neoprene can offer a better life in case there is exposure to oil and water.
Makeshift anti-vibration solution: In field conditions where we have to work with the makeshift equipment the anti-vibration mats offer the right solution. These rubber mats can be spread out on the floor and equipment like small compressors and generators can be placed on them. Even in homes, the anti-vibration mat for washing machines is quite useful. When the machine is spinning and the load is continuously shifting the vibrations create a lot of noise. The anti-vibration mat nor only dampens the vibrations but also prevents the machine from walking and hitting the side walls.
Materials used in grommets: The anti-vibration grommets come in a variety of dimensions, sizes and shapes. These can be with or without the metallic bush in the center. The anti-vibration grommet is engineered to isolate delicate and sensitive instruments from unpredictable shock and vibration. The insulating anti-vibration grommets are manufactured from durable EPDM rubber. For cooling fans, motors and hard disk drives, the neoprene locking and anti-vibration grommets are well suited. Grommets are also made from a stainless steel body with silicone rubber insert having a hole in the center. While the steel portion provides the rigidity, the rubber portion has a dual purpose. It not only dampens the vibration but also provides the necessary sealing action.
A beginning was made by Andre HVAC International Inc. in the anti-vibration products arena way back in 2003. Today, the entire range of products used in the industry to stem vibrations is available with them. Whether it the wire rope isolators or the simple anti-vibration rubber mats, the choice is yours for the asking. Extensive product catalogues, information sheets and pages of information are available on the website to help you in making the right selection of the anti-vibration isolation pads. In case, you need a specific solution, the team at AHI would be happy to work out a customized offering for you.