| 摘要 |
A dual pump hydraulic control system with a predetermined flow crossover provision is disclosed including a first hydraulic control circuit having a first source of fluid pressure, a first motor, a first distributor valve in communication with the first source and moveable into an actuating condition for directing fluid to the first motor, a second motor, a second distributor valve in interrupted series communication with the first distributor valve and moveable into an actuating condition for directing fluid to the second motor; a second hydraulic control circuit having a second source of fluid pressure, a third motor, a third distributor valve in communication with the second source for directing fluid to the third motor; and a crossover valve and resolver network responsive to the actuating condition of the first distributor valve and to the actuating condition of the second distributor valve for communicating fluid from the second source to the second motor to supplement fluid from the first source to the second motor while preventing full fluid flow from both the first and second sources thereto. Such hydraulic system is particularly adapted to simultaneous swing and stick-in movement of a hydraulic excavator.
|
