| 主权项 |
1. A mechanical balancing device for a fluid-pressure actuating system; the actuating system including first fluid-pressure connecting means to a first fluid-pressure network and second first fluid-pressure connecting means to a second fluid-pressure network, the first fluid-pressure network being independent from the second fluid-pressure network and both networks being connected to the mechanical balancing device; the actuating system having at least a first actuator and a second actuator, the first fluid-pressure connecting means are for linking and feeding the first actuator with fluid-pressure from the first fluid-pressure network, while the second fluid-pressure connecting means are for linking and feeding the second actuator with fluid-pressure from the second fluid-pressure network; the first actuator and the second actuator being mechanically linked to cooperate for displacing at least a first common output member and a second common output member between two extreme control positions; the first and second actuators includes respectively a first and second movable piston each severing an extraction fluid-pressure chamber and a refraction fluid-pressure chamber,
wherein for the fluid-pressure balancing device to provide flexible/continuous force fight compensation for respective first and second actuators, the fluid-pressure balancing device includes, for each of first/second-extension/retraction chambers of the first and second actuators, one dedicated fluid-pressure commanded balance valve; a first balance valve being commanded to balance fluid-pressure from the first fluid-pressure network to a given extension fluid-pressure chamber of the first actuator, is rigidly coupled by a corresponding coupling rod to a cooperating second balancing valve balancing fluid-pressure from the second fluid-pressure network to a given extension fluid-pressure chamber of the second actuator; while a third balancing valve commanded to balance fluid-pressure from the first fluid-pressure network to a given retraction fluid-pressure chamber of the first actuator, is rigidly coupled by another corresponding coupling rod to a cooperating fourth balancing valve balancing fluid-pressure from the first fluid-pressure network to a given retraction fluid-pressure chamber of the second actuator; each fluid-pressure commanded balance valve being arranged to allow relief of differential pressure, directly into a dedicated return pressure relief line of an associated first fluid-pressure network or an associated second fluid-pressure network; a locking assembly cooperating with the mechanical balancing device and includes, for each of a pair of first/second balance valves and third/fourth first balance valves, a fluid-pressure controlled locking device, each locking device having first and second retainer pins adapted to engage with the corresponding coupling rods thus inhibiting the corresponding pair of first/second balance valves and third/fourth first balance valves, in case of loss of fluid-pressure in one of the first fluid-pressure network or the associated second fluid-pressure network. |
