These vibration dampers effectively suppress the vibrations of home appliances that use compressors, such as refrigerators, air conditioners and washing machines.
Refrigerators, air conditioners, washing machines and other equipment contain compressors that cause large vibrations when operated. High-performance vibration dampers are essential for suppressing this type of vibration, to maintain product performance, and to prevent vibrations from affecting our living environments. Also, because these kinds of products often spend days in transport before reaching the customer’s location, they must be durable enough to withstand extreme vibration. By applying a wide range of materials based on a wealth of vibration-resistant research and advanced analytical simulations accumulated over the years, Yamauchi has produced optimal vibration-resistant rubber designs, and offers high-quality parts that are backed by thorough quality control, all the way from the manufacturing stage to the inspection process.
Resonance at specific frequency ranges can be avoided by changing the rubber hardness. For example, as seen in the graph #1, the resonance point can be lowered by decreasing the rubber hardness. Yamauchi uses advanced know-how to achieve flexible control by employing fine hardness settings with 5-degree steps across the wide hardness range of 3 to 60 (A).
Resonance can be suppressed by changing the rubber’s dynamic viscoelasticity. The graph #2 is an image showing the effect of lowering the resonance magnification using a material with a high tan δ value (a high loss coefficient and low elasticity). Yamauchi responds to diverse demands by grading materials across a wide dynamic viscoelasticity range (tan δ) of 0.1 to 0.8.