An unloading valve includes a valve body, a valve trim, a return spring, a damping hole, and an unloading groove. A combined valve includes the unloading valve and a throttling valve. The throttling valve includes a buffer stopper and a buffer chamber. A piston rod assembly of the combined valve type buffer cylinder is provided in a cylinder body. The cylinder body includes a cylinder head flange, a cylinder bottom, and a cylinder barrel. The piston rod assembly includes a guide sleeve, a piston, and a piston rod. The combined valve is provided on the cylinder. The system is located in an unloading state in a buffering process to reduce the energy loss and heat buildup of the system, prevent the pressure impact of buffering on the system, make the system more reliable, and lower the difficulty of the original buffer valve in performance matching, installation and debugging.

A process control device has an electropneumatic control unit which is used for activating a pneumatic actuating drive. The control unit has a fastening module by means of which it is fastened to a drive housing of the actuating drive. The control unit includes an interface plate which is separate from the fastening module, is mounted on a top side of the fastening module and is fluidically connected, through the fastening module, to the actuating drive. The control unit includes an electrically actuatable control valve device which is fixed to the fastening module by being mounted on the interface plate fixed to the fastening module. In this way, a process control device can be produced in an easily and variably configurable manner.

A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic actuator (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and first and second blocking valves (350, 450). A net load (90) is supported by a first chamber (116, 118) of the hydraulic actuator, and a second chamber (118, 116) of the hydraulic actuator may receive fluctuating hydraulic fluid flow from the second control valve to produce a vibratory response (950) that counters environmental vibrations (960) on the boom. The first blocking valve prevents the fluctuating hydraulic fluid flow from opening the first counter-balance valve. The first blocking valve may drain leakage from the first counter-balance valve.

A robotic device may traverse a path in a direction of locomotion. Sensor data indicative of one or more physical features of the environment in the direction of locomotion may be received. The implementation may further involve determining that traversing the path involves traversing the one or more physical features of the environment. Based on the sensor data indicative of the one or more physical features of the environment in the direction of locomotion, a hydraulic pressure to supply to the one or more hydraulic actuators to traverse the one or more physical features of the environment may be predicted. Before traversing the one or more physical features of the environment, the hydraulic drive system may adjust pressure of supplied hydraulic fluid from the first pressure to the predicted hydraulic pressure.

The disclosure relates to a hydraulic control block for controlling a pressure medium supply of a hydraulic cylinder of a hydraulic spindle. The hydraulic control block includes a generic hydraulic switching structure electively configurable in each of a plurality of specific hydraulic switching structures, each of the plurality of specific hydraulic switching structures having a respective hydraulic cylinder with a number of piston areas which differs from a number of piston areas in the respective hydraulic cylinders of each of the other of the plurality of specific hydraulic switching structures.

The disclosure relates to a hydraulic control block for controlling a pressure medium supply of a hydraulic cylinder of a hydraulic spindle. The hydraulic control block includes a generic hydraulic switching structure electively configurable in each of a plurality of specific hydraulic switching structures, each of the plurality of specific hydraulic switching structures having a respective hydraulic cylinder with a number of piston areas which differs from a number of piston areas in the respective hydraulic cylinders of each of the other of the plurality of specific hydraulic switching structures.

A device for filling a hydraulic circuit of an electro-hydrostatic system provided with a discharge valve and a filling valve includes a vacuum generator designed to be connected to the discharge valve via a first shut-off valve in order to eliminate the air or gases present in the circuit, and a source for supplying pressurised hydraulic fluid, which source is designed to be connected to the filling valve via a second shut-off valve and to the discharge valve and the first shut-off valve via a third shut-off valve in order to fill the hydraulic fluid circuit.

The embodiment of the present disclosure provides fluid bulging equipment for thin plate parts, which includes a main mechanism, a left mold opening mechanism and a right mold opening mechanism located on both sides of the main mechanism, a left mobile working platform, and a right mobile working platform. The main mechanism includes a main frame and a main oil cylinder located under the main frame. The main oil cylinder is connected to a master cylinder mold-locked booster cylinder through an oil circuit block. A hydraulic control system is arranged above the main mechanism. An ultra-high pressure generating device is arranged in the hydraulic control system. The ultra-high pressure generating device is connected to the master cylinder mold-locked booster cylinder through a pipeline. The hydraulic control system is also connected to the left mold opening mechanism and the right mold opening mechanism.

The embodiment of the present disclosure provides fluid bulging equipment for thin plate parts, which includes a main mechanism, a left mold opening mechanism and a right mold opening mechanism located on both sides of the main mechanism, a left mobile working platform, and a right mobile working platform. The main mechanism includes a main frame and a main oil cylinder located under the main frame. The main oil cylinder is connected to a master cylinder mold-locked booster cylinder through an oil circuit block. A hydraulic control system is arranged above the main mechanism. An ultra-high pressure generating device is arranged in the hydraulic control system. The ultra-high pressure generating device is connected to the master cylinder mold-locked booster cylinder through a pipeline. The hydraulic control system is also connected to the left mold opening mechanism and the right mold opening mechanism.

A system. The system includes a valve assembly. The valve assembly includes a first port, a second port fluidically couplable with the first port upon application of negative pressure at the first port, a third port fluidically couplable with the first port upon application of positive pressure at the first port, and a first check valve positioned between the first port and the second port. The system also includes a second check valve fluidically couplable with the third port upon the application of the positive pressure at the first port. The second check valve is positioned external to the valve assembly.