E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
341/71
E02D 3/026 (2006.01) E01C 19/28 (2006.01) E02D 3/046 (2006.01)
Patent
CA 1205547
ABSTRACT A procedure and a device for attainment of an optimal degree of compaction when compacting different material such as soil, asphalt and similar road construction materials with vibratory rollers. Normally, an increased vibration ampli- tude increases the compaction effect throughout the entire vibration frequency range. In any event, this applies in the beginning of the compaction work. During this stage the vibrations of the roller drum of the machine can, in principle, be illustrated by a uniform sinusoidal curve. When compaction approaches the final stage, however, the roller drum tends to vibrate more or less irregularly in the form of cradle vibration or bouncing. If the amplitude is then reduced these phenomena can be avoided, resulting in an increase in the degree of compaction. The problem is solved according to the present invention by equipping the vibra- tory roller with a continuously adjustable eccentric element, two or more signal transmitters which are mounted axially separated inside the roller drum and which feel ten- dencies to bouncing or cradle vibration on the part of the drum, and an electronic steering system connected to the signal transmitters which, via the resetting mechanism of the eccentric element, reduces the size of the the vibration amplitude as soon as irregular vibrations are imparted to the roller drum.
424928
Dynapac Maskin Aktiebolag
Ridout & Maybee Llp
LandOfFree
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