A hydraulic system for a feed delivery unit according to the present disclosure may include a pump configured to supply a total flow, the pump including at least one suction port configured to be connected to a reservoir and at least one outlet port configured to be connected to a supply line, a control valve fluidly coupled to the pump and including a plurality of valve sections, the control valve being coupled to the pump such that the total flow supplied by the pump is distributed among the plurality of valve sections, and wherein each valve section of the plurality of valve sections is configured to control a direction of flow of a portion of the total flow, and a plurality of hydraulic motors fluidly coupled to the pump via the control valve, each of the motors being configured to drive a respective auger of the feed delivery unit.

To keep operability of a hydraulic actuator excellent even in a state pressure has been sufficiently accumulated in a pressure accumulator. In a hydraulic driving device of a work machine including a hydraulic actuator, a tank, a flow control valve, and a pressure accumulator, there are further provided with a first pressure compensation valve that is for controlling difference between front and back pressures of the flow control valve constant and a second pressure compensation valve that is arranged between the pressure accumulator and the tank and is for controlling difference between front and back pressures of the flow control valve and the first pressure compensation valve constant.

A valve assembly for receiving a fluid under pressure and comprising a plurality of valves in a single valve block. The assembly may include a plurality of check valves and including a counterbalance generating valve and a 3-way valve and including a method of use. The assembly may include an adjustable counterbalance valve, a pilot-operated check valve and a 3-way valve or combinations thereof.

The present disclosure shows a hydraulic regeneration circuit for a hydraulic cylinder that enables multiple extension speeds for the cylinder even while using fixed displacement pumps. The regeneration circuit uses the expelled fluid to drive a hydraulic pump/motor combination to create 4 or more speeds, as opposed to the 2 speeds typical in regeneration circuits. By using directional flow control valves, the fluid can be combined in such a way that the operator can choose a speed multiplier for the hydraulic cylinder to operate at.

Disclosed are an adjustable load pressure compensation balancing system, an end cover, and a counterbalance valve. The adjustable load pressure compensation balancing system comprises: an adjustable orifice control module and a counterbalance valve control module, wherein the adjustable orifice control module is used for receiving control oil generated when a luffing system descends and oil from a descending cavity of a luffing cylinder; the counterbalance valve control module is used for receiving the control oil generated when the luffing system descends; the pressure applied to the counterbalance valve control module by the control oil is maximum when the luffing system starts to descend, and then decreases gradually; and the pressure applied to the adjustable orifice control module by the oil from the descending cavity is minimum when the luffing system starts to descend, and then increases gradually.

A load-handling vehicle comprising a load-handling member, a jack for lifting the load-handling member, and a fluid source is provided. The jack may include a lifting chamber and a lowering chamber. The fluid source may be coupled to the lifting chamber and the lowering chamber at a first fluid connection and a second fluid connection, respectively. The first fluid connection may comprise a safety valve normally open in a direction of the flow from the fluid source toward the lifting chamber and normally closed in a direction of flow from the lifting chamber toward the fluid source. A pressure-sensitive valve arranged on the second fluid connection may be controlled in response to the pressure between the safety valve and the fluid source. Additionally, a unidirectional fluid circulation line may fluidly couple the first fluid connection and the second fluid connection.