Why there is so much talk about vibration isolation products?

There is a tremendous amount of interest in vibration isolation material in the general public today. What has brought about this change? What is the reason that people are so much concerned about the vibrations? The vibrations have existed since times immemorial but the awareness came much later. Those who studied science and engineering were well informed but not the general public. Then came the internet boom and it changed the way the people got access to the information. Very quickly the people became aware of the ill-effects of vibrations and how to counter it.

Normal operating conditions: Today, there is a plethora of vibration isolation products available in the market. If you have to install a part generating the dynamic forces on the floor or rooftop you can go in for the vibration isolation mounts. The elastomer element is responsible for damping the vibrations and isolating the vibration source from the support and surroundings. The energy absorbed by the vibration isolation pad is dissipated in the form of low-grade heat into the atmosphere. At times, the cylindrical mounts have threaded studs in the center to allow the equipment to be mounted and tightened with a nut. Thus, the vibration damping pads are easy to install and very effective in vibration mitigation.

Product performance: Thus, we have found two more reasons for the popularity of the vibration isolation products. The ease of installation makes it a product that can be used by one and all. Similarly, the high efficiency of the product becomes known to the people when they see vibrations under control.

Overhead installations: The product range of the vibration isolation material is very vast. While we have talked about the vibration isolation mounts for on the ground/rooftop applications, it is also possible to use the vibration isolation hangers for taking care of suspended equipment. Whether it is the utility pipes carrying the fluids or ducting for the HVAC system carrying cool air, the equipment can be suspended from the ceiling by using the appropriate vibration isolation product. When we say appropriate, it means that the vibration isolator selection has to be made based on the load and deflection characteristics.

Design for suitability: The springs in the vibration isolator hangers come with a spring deflection of one inch or more. The spring deflection allows you to play with the equipment when it exerts a force under dynamic load conditions. The pipes also expand when they carry the hot fluids and contract when the fluid is not there or in a cool state. The rigid supports can break or the pipe may get permanently deformed under such circumstances. However, the vibration isolation hanger is able to absorb the resultant deflection when the pipe expands or contracts. The understanding of the concept has made the vibration isolation products popular.

Product versatility: The vibration isolation products also come in the form of rubber sheets and mats. These products are extremely useful in the field. Equipment like generators and compressors which are a big source of vibrations can be run on construction and machine installation sites by placing them on the rubber mats. The equipment vibrations are absorbed by the rubber mats allowing it to run smoothly without any displacement. A typical application of the vibration isolation pads is at the feet of the household washing machines. The pads do not allow the machine to walk while they are in operation and also prevent the vibrations to get transmitted to the supporting structure.

Tough working conditions: The vibration isolation mounts and vibration isolation hangers find utilization in harsh environments like the armed vehicles moving in rugged terrains. Not only are the springs designed to undergo the deflections due to variable dynamic loads but also the elastomer elements are made of neoprene to provide excellent weather resistance. Similarly, powder coating or galvanizing of the steel parts imparts corrosion resistance. Today, it is possible to use the vibration isolation material in harsh conditions like chemical plants and where there is an exposure to oil and water. The suitability of the vibration isolation products to the typical environmental conditions is another reason as to why people are maximizing their use.

Andre HVAC International Inc. made an entry into the world of vibration isolation material when the information media had started penetrating the masses more than a decade ago. By leveraging the information campaign and assisting the clients in the selection of the vibration isolation products it has moved way ahead of the competition. By sharing the product knowledge extensively and by attempting to resolve the customer problem AHI has won the hearts of one and many. The AHI product range of vibration isolation hangers and vibration isolation mounts is extremely popular with the clients.

Vibration Dampening Pads

Vibration dampening pads are used in industrial applications to absorb mechanical energy for the overall system protection. Using a vibration dampening pad in equipment’s can help isolate the vibration from the source. Dampening is a function of mass, frequency, surface area, and other factors including temperature.

Vibration damping pads are made from a range of materials, one of the more common materials is the rubber pads which are made in a variety of densities and thicknesses that allow for fine tuning. These rubber vibration dampening pads have excellent rebound over a long time frame making it more reliable than any other material.

These damping pads are installed at the source of vibration in the machine or equipment so that they act in compression.  This rubber damping pad serves to increase the damping of the structure, and suppress any form of high frequency vibration or noise induced in machine.  Installing of the damping pad slightly increase the flexibility of the base on which it is installed and can result in slightly higher lateral deflections when installed in the equipment/machine that is subjected to external loadings.

Features of vibration damping pads

  • These damping pads are impervious to most oils and solvents.
  • They are resistant to effects of steam, water, mildew etc.
  • Made of high quality material these pads offer effective damping.
  • Reasonably priced, these vibration damping pads are the best isolators for vibration.

 

Anti-Vibration Pads for isolation of industrial machines

Anti-vibration Pads are used in a number of industrial equipment’s like elastic mounting of machines, generators, pumps, electrical panels, compressors, engines and many other industrial machinery. These isolation pads are suitable for damping vibrations in machines weighing anywhere from 10 Kgs to 20,000 Kgs. By mounting the machines on anti-vibration pads, the vibrational movements are damped by the elastomer or pneumatic damper. These anti-vibration rubber pads are designed to absorb vertical and horizontal vibrations in these machines.

Steps to select the right anti-vibration pads for your machine-

  • Select the industrial machine like generator, compressor, pump, motor etc. for which you need vibration damping pads.
  •  Then select the number of mounting locations for the machine along with all attached accessories available. The number of mounting locations is basically the number of machine feet or machine foundation bolts with the machine.
  •  Calculate the total weight of the machine and then calculate the static and dynamic weight of the machine at each mounting point. Based on these weights select the correct Anti-vibration pad for your application.
  • Check for any special parameters for the anti-vibration pads. For example if you need the anti-vibration pads to be made for mobile applications, if you require the anti-vibration pads to be made suitable for external operations and resistant to weather and climatic conditions, the vibration isolation pads if required can be made rigid or extra soft as per the application, the vibration pads could be made resistant to very high water, acid, oil or diesel flooding, etc.
  • You also need to specify the location of the machine where the anti-vibration pads are to be mounted; that is either on the ground or suspended floors.
  • Specify bolt-size and other mounting requirements for the machine where the anti-vibration pads are to be mounted.

 

Improve the isolation efficiency by using spring mounts

The spring isolation mounts are responsible for increased static deflection as compared to the rubber mounts. Thus, the mounting springs have greater isolation efficiency and are preferred for critical applications. They are also used in mechanical equipment which generates low-frequency vibrations. The selection of the spring mounts can be made on the basis of the load, spring deflection and the size of the mount. Let us take a look at the wide variety of vibration spring mounts.

HVAC spring mounts: The spring vibration isolation mounts are used by the building owners to install the heating ventilation and air conditioning equipment. The HVAC

HVAC spring mounts

HVAC spring mounts

spring mounts dampen the vibrations and reduce the transmission of noise from the equipment to the building structure and support frames.  Besides the spring mount HVAC, vibration noise pad HVAC is also used by the installation team depending on the application requirement.

Spring flex mount isolator: The isolation mounts come with a very rugged construction. The coil spring is at the core and is well supported by the base plate and also encased in a metallic housing. The metallic housing restricts the spring to be compressed beyond the limit by stopping the motion of top plate. The elastomeric element in the spring type anti-vibration mount prevents the metal to metal contact and dampens the vibrations.

Vibration damping spring mounts: The standalone spring mounts or the parts mounting spring have a high horizontal stiffness, which may be higher than the vertical one, in order to prevent them from falling over when they are subjected to minor horizontal forces. This has helped in eliminating the housing that was used to bind the spring. The neoprene/rubber friction pad is used at the bottom of the vibration isolation mount to prevent the passage of noise. The spring loading and adjustment bolt is provided at the top with a cap locking screw to hold the cap in position. The spring mounts vibration damping and noise control is exceptionally good.

 

Vibration isolation pads

Vibration isolation pads

Vibration isolation pads: The rubber and cork combination is at the center of the vibration isolator pads. Cork with its typical noise attenuation properties is sandwiched between two layers of rubber or neoprene elastomer. Natural rubber vibration pads provide maximum resilience and vibration isolation. Natural rubber also contains anti-ozone compounds to improve ageing. The standard Neoprene vibration isolation pads give a longer life and also provide some oil resistance. The vibration damping pads can reduce noise, high-frequency vibration from generators, transformers, pumps, compressors , chillers, HVAC units, and power presses to name a few.

Andre HVAC International Inc. has been instrumental in supplying the isolator mounts and vibration damper pads to meet the specific customer requirements since the year 2003. Since then its business has grown by leaps and bounds because of the quality, cost competitiveness and a wide variety of products available from its stable. Whether it is a typical plastic vibration mount or a simple vibration pad for the hydraulic press you can be sure of finding it at AHI.