| 摘要 |
In a method of compacting a layer of material a compacting machine with at least one drum is rolled over the layer, whereby the layer is acted on by gravitational force and an oscillating force. The latter is the result of applying a substantially pure rapidly alternating torque to the drum about its axis. The direction of action of the torque is reversed with a high frequency in relation to that with which the direction of travel of the compacting unit is reversed. The invention also embraces means for executing the method, wherein the torque on the drum is provided by at least two synchronously operating, rotating eccentric means (2a, 2b) spaces from the shaft (10) of the drum (1), and which are adapted such that the forces caused by their synchronous movement can substantially neutralize each other radially to the drum and coact to form a pure torque on the drum about its shaft (10). |
