Hydraulic system

摘要

A hydraulic system includes a variable displacement first pump, a first linear actuator fluidly connected to the first pump via a first closed-loop circuit, a variable displacement second pump, and second and third linear actuators fluidly connected to the second pump in parallel via a second closed-loop circuit. The system also includes a variable displacement third pump, a fourth linear actuator fluidly connected to the third pump via a third closed-loop circuit, a variable displacement fourth pump, and a first rotary actuator fluidly connected to the fourth pump via a fourth closed-loop circuit. The system further includes a second rotary actuator fluidly connected to the second pump in parallel with the second and third linear actuators. The system also includes a third rotary actuator fluidly connected to the third pump in parallel with the fourth linear actuator.

主权项

1. A hydraulic system, comprising:
a variable displacement first pump; a first linear actuator fluidly connected to the first pump via a first closed-loop circuit; a variable displacement second pump; second and third linear actuators fluidly connected to the second pump in parallel via a second closed-loop circuit; a variable displacement third pump; a fourth linear actuator fluidly connected to the third pump via a third closed-loop circuit; a variable displacement fourth pump; a first rotary actuator fluidly connected to the fourth pump via a fourth closed-loop circuit; a second rotary actuator fluidly connected to the second pump in parallel with the second and third linear actuators; a third rotary actuator fluidly connected to the third pump in parallel with the fourth linear actuator; and a first combining valve configured to selectively combine fluid from the second and third circuits, a second combining valve configured to selectively combine fluid from the first and second circuits, and a third combining valve configured to selectively combine fluid from the third and fourth circuits, wherein the second combining valve is moveable between a flow-passing position and a flow blocking position, the second combining valve directing fluid from the first and second circuits to at least one of the first, second, and third linear actuators and the second rotary actuator in the flow-passing position.