Elastomer rings for linking and positioning of equipment while maintaining acoustic discretion and protection from shocks.
Decoupling washers
A decoupling washer is composed of:
– 2 bonded elastomer washers
– 1 stainless steel anti-shock washer
– 1 stainless steel preload spacer
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The progress in motor vehicle design and increased demand for comfort both in terms of vibration and sound-proofing has resulted inincreasingly demanding specifications for suspension systems.
PAULSTRA hydraulic mountings use an elastomer support device combined with an hydraulic system. The hydraulic system acts differentially and specifically in relation to the frequency range and the type of vibrational excitation incurred.
These mountings, due to a total integration of all components, are still compatible with standard sizes and are as easy to fit as conventional mountings.
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Conical (fig. 1) or spherical (fig. 2) units are used to absorb very high axial loads of up to150 tons.
Angular movement around an axis (Oz in the case of the conical bearing) or a centre of rotation (O in the case of the spherical bearing) are in the order of ± 10°.
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These assemblies can withstand high compression loads (along Oz): up to1,000 tons/sq.meter.
They can absorb shear deformation (along Ox and Oy) of 50 to 100% of their height.
Cylindrical or annular type assemblies can also withstand torsional displacement around axis Oz.
In rotation around axes Oy and Ox, these mountings enable angular or low amplitude rotation errors (approximately 1°).
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Models are available in different elastomers: silicon, fireproofed silicon, fluorosilicon or neoprene, to meet the requirements of the main aeronautics standards (FAR 25 – AIR 7304 – MIL STD 810 – C 172 C -MAR 508 s.o.).
Covering a natural frequency range of 15 to 50 Hz, their applications range from vibration isolation to shock-protection of electronic apparatus and also aircraft fuselage and helicopter cockpit mountings.