VIBRATION EXCITER

摘要

A vibration exciter, particularly for a vibration pile driver, includes at least four shafts disposed parallel to one another, on which two outer imbalance masses are disposed, in each instance, between which a central imbalance mass is positioned. The central imbalance mass is mounted on the shaft so as to rotate relative to the outer imbalance masses, in each instance. The imbalance masses of the at least four shafts are combined into two imbalance groups, the imbalance masses of which are all synchronized with one another in torsionally rigid manner, in each instance, wherein not only outer imbalance masses but also inner imbalance masses are provided in each of the two imbalance groups, and wherein a phase shifter is provided, by way of which the phasing of the two imbalance groups relative to one another can be adjusted.

主权项

1. A vibration exciter comprising:
(a) at least first, second, third, and fourth shafts; (b) first and second outer imbalance masses and a first central imbalance mass disposed on the first shaft, wherein the first central imbalance mass is positioned between the first and second outer masses and mounted on the first shaft so as to rotate relative to the first and second outer imbalance masses; (c) third and fourth outer imbalance masses and a second central imbalance mass disposed on the second shaft, wherein the second central imbalance mass is positioned between the third and fourth outer masses and mounted on the second shaft so as to rotate relative to the third and fourth outer imbalance masses; (d) fifth and sixth outer imbalance masses and a third central imbalance mass disposed on the third shaft, wherein the third central imbalance mass is positioned between the fifth and sixth outer imbalance masses and mounted on the third shaft so as to rotate relative to the fifth and sixth outer imbalance masses; (e) seventh and eighth outer imbalance masses and a fourth central imbalance mass disposed on the fourth shaft, wherein the fourth central imbalance mass is positioned between the seventh and eighth outer imbalance masses and mounted on the fourth shaft so as to rotate relative to the seventh and eighth outer imbalance masses; and (f) a phase shifter; wherein the imbalance masses and the central imbalance masses of the first, second, third, and fourth shafts are combined into first and second imbalance groups; wherein the imbalance masses of the first imbalance group are synchronized with one another in torsionally rigid manner and the imbalance masses of the second imbalance group are synchronized with one another in torsionally rigid manner; and wherein phasing of the first and second imbalance groups relative to one another are adjustable by way of the phase shifter.