Low-loss drive system for a plurality of hydraulic actuators
AssigneeAeroquip-Vickers International GmbH
InventorBernhard Zervas
Life of this patent
Estimating the term…
Abstract
The invention related to a drive system with at least two hydraulic actuators, which are supplied with a hydraulic fluid by means of at least one pump. The drive system comprises at least one further second pump (15′) arranged parallel to the first pump (15), wherein the pumps are bi-directionally speed-regulated, and a valve arrangement (59) with one inlet per pump (61.1, 61.2), wherein each one of the inlets is connected to a pump (15), and with a number of outlets (63.1, 63.1′, . . . 63.4, 63.4′) which are connected to the actuators (1.1 . . . 1.4), wherein the inlets (61) can be connected to the outlets (63) in a pre-determined manner.
Claims17
A drive system comprising:
- at least two hydraulic actuators;
- a first pump and at least one further pump that are configured to supply hydraulic fluid to the actuators, wherein the pumps are bi-directionally speed-regulated;
- and
- a valve arrangement having one inlet for each pump and a number of outlets connected to the actuators, wherein each of the inlets is connected to a pump and wherein the inlets are connected to the outlets in a pre-determined manner;
- wherein, in a first switching position of the valve arrangement, a first inlet of the valve arrangement is connected to a first outlet of the valve arrangement and a second inlet of the valve arrangement is connected to a second outlet of the valve arrangement, wherein the first and second outlets are connected to the same actuator.
A drive system comprising:
- at least two hydraulic actuators;
- a first pump and at least one further pump which are configured to supply hydraulic fluid to the actuators, wherein the pumps are bi-directionally speed-regulated;
- and
- a valve arrangement having one inlet for each pump and a number of outlets connected to the actuators, wherein each of the inlets is connected to a pump and wherein the inlets are connected to the outlets in a pre-determined manner;
- wherein, in a first switching position of the valve arrangement, the two pumps are connected to different actuators;
- wherein the valve arrangement is switchable between the first switching position and a second switching position;
- and wherein in the second switching position, both pumps are connected jointly to one outlet, in order to supply one actuator.
A drive system comprising:
- at least two hydraulic actuators;
- a first pump and at least one further pump which are configured to supply hydraulic fluid to the actuators, wherein the pumps are bi-directionally speed-regulated;
- and
- a valve arrangement having one inlet for each pump and a number of outlets connected to the actuators, wherein each of the inlets is connected to a pump and wherein the inlets are connected to the outlets in a pre-determined manner;
- wherein each of the pumps is associated with a separate electric motor adapted to drive the pump, each electric motor having a variable speed for each direction of rotation;
- wherein the valve arrangement is switchable between a first switching position and a second switching position;
- wherein, in the first switching position of the valve arrangement, the two pumps are connected to different actuators, and in the second switching position of the valve arrangement, both pumps are connected jointly to one outlet, in order to supply one actuator.
Dependencies are inferred from the claim text.