EP 0865327 A1 19980923 - ADJUSTING DEVICE FOR AN UNBALANCE VIBRATOR WITH ADJUSTABLE CENTRIFUGAL MOMENT
Title (en)
ADJUSTING DEVICE FOR AN UNBALANCE VIBRATOR WITH ADJUSTABLE CENTRIFUGAL MOMENT
Title (de)
VERSTELLEINRICHTUNG FÜR EINEN UNWUCHT-RICHTSCHWINGER MIT VERSTELLBAREM FLIEHMOMENT
Title (fr)
DISPOSITIF DE REGLAGE POUR VIBRATEUR A BALOURD AVEC COUPLE CENTRIFUGE REGLABLE
Publication
Application
Priority
- DE 19543910 A 19951126
- EP 9605204 W 19961125
Abstract (en)
[origin: DE19543910A1] An adjusting device for an unbalance vibrator with adjustable centrifugal moment. The invention concerns specifically the specialised category of vibrators in which each unbalance shaft has its own motor (110, 112, 114, 116) and no transmission system is provided for connecting the minimum of four unbalance shafts. A novel way of hydraulically actuating the motors is described for ram vibrators of this type provided with four hydraulic motors (110, 112, 114, 116). This involves connecting two motors (the ones allocated to the two unbalance shafts which always rotate synchronously counter to one another even during adjustment) in parallel to their own respective hydraulic circuits. Each of the two hydraulic circuits (118, 120) has its own pump (P1, P2) and the pressures in the forward flow and/or back flow lines can be adjusted independently from the outside by a control and regulation device (126, 128) in such a way that they can be used to set the centrifugal moment in a predetermined manner. A particular advantage lies in the fact that all the motors (110, 112, 114, 116) are subjected to the same load when the centrifugal moment is greatest. In a special embodiment, both pumps (P1, P2) can also be used in open circulation.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
B06B 1/166 (2013.01 - EP US); B06B 1/186 (2013.01 - EP US)
Citation (search report)
See references of WO 9719765A1
Designated contracting state (EPC)
BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
DE 19543910 A1 19970528; DE 59604380 D1 20000309; EP 0865327 A1 19980923; EP 0865327 B1 20000202; JP 2000500697 A 20000125; US 6105685 A 20000822; WO 9719765 A1 19970605
DOCDB simple family (application)
DE 19543910 A 19951126; DE 59604380 T 19961125; EP 9605204 W 19961125; EP 96939923 A 19961125; JP 52015697 A 19961125; US 7723298 A 19980622