IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0077232
(1998-06-22)
|
우선권정보 |
DE-0043910 (1995-11-26) |
국제출원번호 |
PCT/EP96/05204
(1996-11-25)
|
§371/§102 date |
19980622
(19980622)
|
국제공개번호 |
WO-9719765
(1997-06-05)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- GEDIB Ingenieurburo und Innovationsberatung GmbH, DEX
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
14 인용 특허 :
5 |
초록
▼
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 u
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 centifugal moment in a predeternmined 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.
대표청구항
▼
[ What is claimed is:] [20.] An adjusting device for an unbalance vibrator having a vibrating mass, the device comprising:at least two groups of part unbalance elements, each of the groups including two part unbalance elements, each of the unbalance elements being driveable to rotate about an associ
[ What is claimed is:] [20.] An adjusting device for an unbalance vibrator having a vibrating mass, the device comprising:at least two groups of part unbalance elements, each of the groups including two part unbalance elements, each of the unbalance elements being driveable to rotate about an associated axis, the part unbalance elements of the first group rotating synchronously in a first direction and the part unbalance elements of the second group rotating synchronously in a direction opposite to the first direction with mirror-image symmetrical angles of rotation, each of the unbalance elements having a centrifugal force, the sum of the centrifugal forces causing the mass of the vibrator to execute directional oscillations, the part unbalance elements of the second group defining a setting angle .beta. relative to the part unbalance elements of the second group;an electric motor coupled to each of the part unbalance elements in such a way that a torque can be transmitted therebetween, the setting angle .beta. being adjustable by the electric motors, the motors of the unbalance elements of each group being electrically connected in parallel and acted upon together;electric drive and control means for generating an electrical current through the motors;control means for directly or indirectly setting the relative setting angle .beta. by setting a predefinable value for the relative setting angle .beta., setting a predefinable value for the amplitude of the oscillatory travel x, or setting a predefinable value for the amplitude of a time derivative x' or x" thereof, the predefinable value falling within a range of a minimum resultant centrifugal force vector to a maximum resultant centrifugal force vector; andmeans for measuring the current value of a controlled variable as the magnitude of the relative setting angle .beta. is influenced directly or indirectly;wherein:measurable torque gradients of different signs are setable by the control means between the motors of the first group of part unbalance elements and the motors of the second group of part unbalance elements, the torques being measurable at the shafts of the motors, the torque gradient of the motors of one of the groups alternating from a positive value to a negative value, while passing through a range of adjustment from a smaller resultant static moment to a maximum resultant static moment, the motors being in a generate mode of operation when the torque gradient has a positive value,the values of the torque gradients on the motors of each group are equal in terms of direction and average magnitude, while maintaining the preferred direction of oscillation of the vibrator, andthe predefinable value is set by influencing the values of the torque gradients on the motors, in terms of magnitude and direction, with the aid of the control means.
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