Aandrijfenbesturing.nl – Rest in the motorhome with Bubble Mounts

Going out with a motorhome is a popular way to vacation for many people. This also applies to Peter van Dijk, director of Dijko Ovens BV from Tilburg. He is the proud owner of a luxury motorhome. The only downside: built-in compressors that caused tangible and audible vibrations when stationary

In Peter van Dijk’s luxury camp, Bubble Mounts provides the necessary peace and quiet. (Photo: Peter van Dijk)

With their elegant interiors, exclusive looks and powerful engines, motorhomes have developed into five-star hotels on wheels. High-pitched air conditioners and other technical systems powered by compressors, such as air suspension or the systems that open and close the doors, do not fit into this. While driving, the noise is not so annoying, especially because the compressor connected to the engine then delivers the compressed air. If the motorhome is stationary, it must be quiet. In Peter van Dijk’s motorhome, two extra compressors provide a comfortable living climate.

Disturbing vibrations and noise

But fitting compressors to the air supply system for suspension, doors and toilets caused problems. The vibrations from the technical installation under the motorhome were transmitted to the body. This led to clearly felt and audible vibrations which disturbed the owner. In addition, the two smaller compressors switched on depending on the air consumption at intervals of 15 to 30 minutes and produced noise, which was especially a nuisance at night.
Peter van Dijk did not want to let it go and went for a solution. As a mechanical engineer and expert in automation and electronic control of furnace systems with integrated vacuum cooling and freezing systems, air conditioning technology, pneumatic systems and compressors have no secrets for him. He started looking online for parts to insulate vibrations. He soon landed on the website of ACE Stoßdämpfer,
That ACE can also give a helping hand to private individuals is evident from the solution to dampen the noise from the motorhome’s compressors, which has been developed using the free ACE calculation tool.

Customization with a few clicks

Taking into account all relevant core data for the respective design, such as weight and bearing points, a calculation tool specially developed by ACE calculates, among other things, the machine’s center of gravity and thus the individual load of the bearing points, whereby eccentric loads can also be entered. The online tool is so intuitive to use that engineers can in many cases calculate the ideal solution themselves with a few steps and 24 hours a day. However, the software not only determines which vibration dampers best match the values ​​entered, but is also directly linked to the webshop.
In this case, the program proposed the so-called Bubble Mounts of the type BM-50641. These economical and efficient parts achieve an insulation degree of 95.65 percent under the given circumstances. Bubble Mounts are designed for efficient insulation of light loads in avionics, on computers or for storage of particularly sensitive medical equipment. The small and compact rubber-metal insulators are ideal for use under vertical compressive loads and are therefore particularly suitable for efficient insulation of small pumps or compressors, for example in motorhomes. Although small, they have excellent cushioning properties. If desired, these can be further improved by using silicone. At a nominal load of 8 Hz, the natural frequency is so low that harmful vibrations can be effectively eliminated in most cases. Bubble Mount type BM-50641 is easy to install and can handle loads from 1.2 kg to 2.9 kg. Peter van Dijk looks back at the installation process and the replacement of the parts: “Originally, simple, cylindrical rubber components with a diameter and length of 15 mm were placed to disconnect the compressors from the mounting point at the bottom of the technical installation. This was very inefficient and “Immediately after replacing the original rings on the first compressor, a difference could be felt.” To ensure an even load distribution, each of the 7.3 kg compressors is now equipped with ACE’s bubble fittings at all four mounting points. Unwanted vibrations are now a thing of the past.

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