Do not ignore the vibrations! Use anti-vibration mat protection.

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.

How can an air compressor mounting pads help limit high frequency vibration?

Almost every machine in an industry, work shop, or garage vibrates when in motion.  While in most cases these vibrating machines aren’t harmful, sometimes in case of high frequency vibration can cause machinery to fail and cause pipe fittings and welds to leak. That’s when every compressor must be isolated from vibration with an air compressor mounting pads.  So, when it comes to vibration issues in an air compressor, there are two places that are always a major concern.

Every compressor manufacturer says that you need a vibration isolators or flex hose between the compressor and the pipe system.  It is important that everybody knows how critical they are to the air compressor. The reason being your compressor vibrates at high frequency when the air goes down the pipe.  The vibrations from different sources have different harmonics that vibrate at different frequencies and different amplitudes.  When you don’t isolate the vibrations of different harmonics, it wears off the components much more quickly, resulting in lesser life span of the machine.

Although most compressors are built and tested to withstand its own vibration, but they were not built to withstand different harmonics. There is no way a manufacturer could possibly test all the conditions that a compressor may face especially when having infinite number of possibilities.  Also the problems that we are discussing are not immediate results. They are in fact a long term effect that usually takes a couple of years for the lack of vibration isolation to cause such problem.  However there are also chances that it may never cause a problem.  But investing in an anti- vibration mounting pads, prevent thousands of dollars in broken parts and they surely seem like a no-brainer to me.

Vibration pads where the compressor is mounted

The other place where you have to worry about vibration in an air compressor is where the compressor is mounted.  There should be a rubber pad or foot at the bottom of the compressor.  Sometimes the compressor will come with these pads already installed, but sometimes you will have to add them yourself. If you don’t do this, the weld where the foot of the tank meets will crack.  Again this could take several years, but why make a tank that should last decades only last a few years?  This issue can also be easily avoided with a little bit of investment in compressor mounting pads or sheets.

Vibration free environment helps in longer equipment life

Air compressor mounting pads: In the case of compressors the vibrations result from the unbalance of the rotating parts or from the attached piping structure. The unbalance is generated due to unequal weights on the piston pairs and is transferred onto the crankshaft. The piping structure resonates when some vibration in the system comes close to the natural frequency of the piping. The air compressor mounting pads not only dampen the vibrations but also provide for the ease of levelling and alignment.

The compressor machinery mounting pads have elastomeric elements and threaded centre bolts which offer a host of benefits:

  • Ease of installation with no requirement of anchor bolts.
  • Simple levelling and alignment leading to reduced wear and tear.
  • Reduction in vibration and shock
  • Longer running life
  • Better structural safety for the plant.

Furnace thermal mounting pad: The machine pads come are simple rectangular rubber pieces that come in several lengths and widths. They consist of an elastomeric element

Air compressor mounting pads

Air compressor mounting pads

and composite foam and are less than an inch high. They can be positioned below the furnace and the size and quantity are decided as per the weight and size of the furnace. The furnace thermal mounting pads are ideal for old equipment that creates a ruckus.

Anti-vibration pads for washing machines: The washing machines create a lot of vibrations due to the uneven load during rotation. The washing machines will walk during the work cycle even after the levelling has been done. The solution does not lie in anchoring the machine to the floor but to use the anti-vibration pads for washing machines. The visco-elastomeric property of the anti-vibration isolation pad ensures that the vibrations are damped and prevent the machine from sliding on the floor.

HVAC mounting pads: The waffle and ribbed anti-vibration pads are used for the mounting of the HVAC equipment. The waffle design has inbuilt suction cups and does not require any bolting. The waffle design ensures superior vibration damping. The multi-layered ribbed rubber pads offer both vibration and noise control. The waffle and ribbed HVAC mounting pads are meant for simple field installation and can be selected based on the load and deflection characteristics.

 

Anti-vibration pads for washing machines

Anti-vibration pads for washing machines

Cork and neoprene rubber pads: The cork rubber pad that has a cork core with rubber glued to both the surfaces. The arrangement of materials, forces sound to pass through zones of different density. The neoprene cork pads are especially recommended for acoustical control rather than vibration damping. The neoprene in the cork rubber pad provides it with good weather resistance. Similarly, anti-vibration grommets are used for isolating sensitive lab equipment and electronics from the supporting frames.

Andre HVAC International Inc. has been in the business of vibration and noise control since 2003. The leading anti-vibration pad supplier has a wide variety of isolation mounts and pads for the industrial application and home use. Whether it is a machine like a compressor or home equipment like a washing machine you are likely to find the suitable anti-vibration mounting pad with AHI.