A integrated fluid conduit is provided having two or more internal conduits, the size and shape of the internal conduits is designed to optimize the hydraulic diameter of each conduit based on the needs of the system. The integrated fluid conduit is advantageously manufactured according to additive manufacturing techniques which enable formation of off-center and/or non-concentric internal conduits adapted to specific applications requiring turns such as the fuel delivery system or the hydraulic system of/on a gas turbine engine for an airplane.

A integrated fluid conduit is provided having two or more internal conduits, the size and shape of the internal conduits is designed to optimize the hydraulic diameter of each conduit based on the needs of the system. The integrated fluid conduit is advantageously manufactured according to additive manufacturing techniques which enable formation of off-center and/or non-concentric internal conduits adapted to specific applications requiring turns such as the fuel delivery system or the hydraulic system of/on a gas turbine engine for an airplane.

In a hydraulic system which is biased to a minimum system pressure using a bias valve or other flow obstruction disposed in a tank line, there is provided in a bypass line to the bias valve an evacuating and filling valve through which the hydraulic system is first evacuatable and subsequently fillable with a hydraulic fluid. The valve closes the bypass when a differential pressure overcomes a preadjusted force of a spring element. For this purpose, the valve possesses a displaceably mounted valve body with an integrated throttle and a seal face which closes a through opening when the valve body is shifted against the bias force of the spring element due to the pressure difference.

A self-adaptive control system comprises a feeding device, a rotary coder, a displacement sensor, a hydraulic regulation system and a controller, wherein, the input end of the controller is electrically connected with the rotary coder, the displacement sensor, a first oil pressure sensor and a second oil pressure sensor respectively, and the output end of the controller is electrically connected with a solenoid directional valve via an interlocking controller; the controller takes the bearing force of piston rods and the rotation speed and the rotation speed change rate of a feeding knife roller as input variables and takes the positions of the piston rods as an output variable, to establish a fuzzy control model of the feeding mouth opening of the feeding device, the extension and retraction of the piston rods in a left oil cylinder and a right oil cylinder under hydraulic driving are regulated actively by controlling a three-position four-way solenoid directional valve, and thereby self-adaptive control of the feeding mouth opening is achieved.

The invention relates to a pump control method for the control of the operation of a pump system with at least two pump assemblies (2) which are arranged parallel or in series to one another. The method includes determining a specific total power E.sub.S of the complete pump system which defines a total power in relation to a hydraulic total load of the complete pump system, determining a specific individual power E.sub.P,n of each pump assembly (2) which defines an individual power in relation to the individual hydraulic load of the respective pump assembly (2), computing an individual load factor E.sub.gain,n for each pump assembly (2) according to the equation $E_{\mathrm{gain},n}=\frac{E_S}{E_{P,n}}$
and adapting the individual hydraulic load (Q.sub.n; H.sub.n) of the pump assemblies (2) in dependence on a desired hydraulic load (Q.sub.D; H.sub.D) as well as on the individual load factor E.sub.gain,n of the respective pump assembly (2).

The invention relates to a pump control method for the control of the operation of a pump system with at least two pump assemblies (2) which are arranged parallel or in series to one another. The method includes determining a specific total power E.sub.S of the complete pump system which defines a total power in relation to a hydraulic total load of the complete pump system, determining a specific individual power E.sub.P,n of each pump assembly (2) which defines an individual power in relation to the individual hydraulic load of the respective pump assembly (2), computing an individual load factor E.sub.gain,n for each pump assembly (2) according to the equation $E_{\mathrm{gain},n}=\frac{E_S}{E_{P,n}}$
and adapting the individual hydraulic load (Q.sub.n; H.sub.n) of the pump assemblies (2) in dependence on a desired hydraulic load (Q.sub.D; H.sub.D) as well as on the individual load factor E.sub.gain,n of the respective pump assembly (2).

An adaptor is used to couple a prime mover to an actuator. The adaptor includes a first portion that attaches to the prime mover and a second portion that attaches to the actuator. The outer surface of the first portion is defined by at least one flat portion connected by at least one arcuate portion. The second portion has a bore configured to accept the first portion, with an inner surface shaped to complement the outer surface of the first portion. A bore through the first portion accepts a drive shaft of the prime mover therethrough where the drive shaft is configured to engage the actuator.

There is provided a die cushion device that includes a cushion pad, a hydraulic cylinder configured to lift the cushion pad, and a hydraulic closed circuit connected to a die cushion pressure creation chamber of the hydraulic cylinder. The hydraulic closed circuit includes a pilot drive type logic valve that is operable as a main relief valve at the time of the die cushion operation, and a pilot relief valve configured to create pilot pressure for controlling the logic valve. Hydraulic oil is filled in the hydraulic closed circuit, in a pressurized manner, and the hydraulic oil in the hydraulic closed circuit is pressurized by only die cushion force applied from the cushion pad through the hydraulic cylinder, in one cycle period of the cushion pad.

A pneumatic control device includes a functional assembly that has an interruption valve device for the selective opening or interruption of at least one main working channel used for the pneumatic control of a pneumatic actuator. The functional assembly also contains a manually actuatable valve device that is connected to the interruption valve device by means of at least one auxiliary working channel and which enables manual pneumatic control of the connected actuator, if the at least one main working channel is interrupted by the interruption valve device at the same time. A process control device can also be equipped with a control device of this type.

A pneumatic control device includes a functional assembly that has an interruption valve device for the selective opening or interruption of at least one main working channel used for the pneumatic control of a pneumatic actuator. The functional assembly also contains a manually actuatable valve device that is connected to the interruption valve device by means of at least one auxiliary working channel and which enables manual pneumatic control of the connected actuator, if the at least one main working channel is interrupted by the interruption valve device at the same time. A process control device can also be equipped with a control device of this type.