Abstract: A load-controlled hydraulic supply for an attachment attached to an agricultural tractor includes a hydraulic high-pressure source providing a volume flow in a supply line, a return line leading to a hydraulic reservoir, and a load-indicating line connected to a device for pressure limiting. The volume flow is adjusted based on pressure feedback prevailing at the load-indicating line.

Abstract: Wearable actuator systems are disclosed herein. The wearable actuator system may include an active layer comprising a plurality of actuators, each actuator having a deformable shell that defines an enclosed internal cavity, a fluid dielectric contained within the enclosed internal cavity, a first electrode disposed over a first side of the enclosed internal cavity, and a second electrode disposed over a second side of the enclosed internal cavity. The system further includes an interface layer and a fastener, wherein the active layer and the fastener form an enclosed shape having an internal area, and wherein a size of the internal area of the enclosed shape is adjustable using the fastener.

Abstract: A valve arrangement is inserted between a master brake cylinder and a reservoir in a housing of an electrohydraulic motor vehicle brake system which can be activated both by a vehicle driver and independently of the vehicle driver. The valve arrangement can be acted on by a volume flow which can be conveyed by a linear actuator in the direction of a pedal travel simulator, the working chamber of the pedal travel simulator being connected to the master brake cylinder, wherein, for the purpose of simplified construction and actuation, the valve arrangement has a hydraulically actuable non-return valve and a fixed orifice arranged parallel to the non-return valve. The non-return valve is arranged together with the fixed orifice in a valve carrier which is fastened to a closure plug which closes the housing of the motor vehicle brake system.

Abstract: Blade of a turbomachine turbine including a airfoil extending along a first direction between an internal end and an external end, a base secured to said internal end, and a root secured to said external end and extending, along a second direction perpendicular to said first direction, between an upstream edge and a downstream edge and, along a third direction orthogonal to the first and second directions, between first and second lateral edges, the first side edge having, in a plane including the second and third directions, a shape complementary to that of the second lateral edge. The first lateral edge includes a first portion extending from the upstream edge, and a second portion externally protruding along the third direction at an acute angle with the first portion.

Abstract: A seal system for a bearing chamber (22) of a turbomachine includes the baffle element (70) encircling the axis (25) of the machine. The baffle element is formed with front surface including both a recess (73) which defines a circumferentially-extending oil-receiving channel (74), and an oil-deflecting surface (78) on a gutter (77). The channel decreases in cross-sectional area close to the oil-deflecting surface, and a circular line which is within the channel distant from the gutter, intersects with the oil-deflection surface. This forces the oil to change direction at the gutter, and urges the oil radially outward. Thus, a high rotational velocity of the body of oil may be maintained, whilst improving the drainage efficiency of the seal system at the gutter.

Abstract: A locking unit with a hydraulically actuable piston, an electromagnet with a coil and an armature, at least one latching element, a coupling rod, and a magnetic element. The coupling rod connects the magnetic element to the armature or an armature rod which is attached thereto, and a prestressing element fixes the magnetic element in a guide tube radially. As a result, an advantageous position determination is made possible by way of sensing of a magnetic field which is generated by the magnetic element.

Abstract: A hydraulic supply device includes: a first oil pump configured to supply oil to a supply passage; a second oil pump driven together with the first oil pump or driven when the first oil pump is stopped; a first check valve provided in a first oil passage that allows a suction side of the second oil pump to communicate with an oil source, and configured to close the first oil passage when the second oil pump is stopped; a second check valve provided in a second oil passage that allows a discharge side of the second oil pump to communicate with the supply passage, and configured to close the second oil passage when the second oil pump is stopped; and a third oil passage into which the oil supplied to the supply passage flows, wherein the oil flowing into the third oil passage is used as an auxiliary pressure for operation of the second check valve when the second oil passage is closed.

Abstract: A hydraulic system can include a hydraulic actuator including a piston rod slidably disposed within a housing having a base-side port and a rod-side port, a hydraulic pump, a hydraulic reservoir, an accumulator, a first control valve operable to selectively control flow from the pump to the base-side port and from the base-side port to the reservoir, a second control valve operable to selectively control flow from the pump to the rod-side port and from the rod-side port to the reservoir, a third control valve operable to selectively allow flow between the base-side port and the accumulator, and a controller for operating the hydraulic system and including a ride control mode in which damping is provided to the hydraulic actuator by operation of the first, second, and third control valves.

Abstract: A system and method for the controlled lowering and lifting of a load are disclosed. The system and method may include operating a work machine having a hydraulic system including a hydraulic actuator for supporting a load, a first control valve in fluid communication with the actuator, and a controller for operating the first control valve. In one embodiment, the controller includes a first algorithm for operating the first control valve in a load lowering operation. When an operational fault within the hydraulic system is detected, the controller can be configured to enter into a safe lowering mode. In the safe lowering mode, the first algorithm is disabled and a pulse width modulation (PWM) current is sent from the controller to the first control valve. A user interface is provided to allow an operator to control the PWM current duty ratio to allow the load supported by the actuator to be lowered.

Abstract: A hydraulic system in a work machine includes a travel operation device provided in a pilot oil path between a hydraulic pump a travel pump and including an operation member and configured to generate a pilot pressure supplied via the pilot oil path and an additional pilot pressure in accordance with an operation amount of the operation member. The travel pump is to control a flow direction of hydraulic oil supplied to a travel motor based on the pilot pressure and the additional pilot pressure. A pressure selection valve is provided in a first coupling oil path to select a selected pressure from the pilot pressure and the additional pilot pressure to apply the selected pressure to the pilot hydraulic oil in the second coupling oil path. A pressure adjustment valve is provided in a second coupling oil path to control the selected pressure to be an adjusted pilot pressure.

Abstract: A fluid circuit includes first switching valve that switches between flow passages and first flow passages according to a change in a fluid pressure to be applied, a second switching valve that is switched to a flow passage which applies the fluid pressure to the first switching valve, when a piston has reached an initial position or an end position, and second flow passages. A biasing force of a biasing member when the piston reaches the end position is smaller than a pressing force acting on the piston due to the fluid pressure caused by a fluid supply device, and a biasing force of the biasing member when the piston reaches the initial position is larger than a sum of a flow passage resistance force acting on the first flow passages and a flow passage resistance force acting on the second flow passages.

Abstract: A rotor blade of a wind turbine includes a first rotor blade segment having a first shell portion, a second rotor blade segment having a second shell portion and a joint connecting the first rotor blade segment with the second rotor blade segment between the first shell portion and the second shell portion, whereby the rotor blade further includes a fairing, the fairing covering the joint and being attached to the first shell portion and the second shell portion by means of an adhesive. Further provided is a wind turbine having this rotor blade.

Abstract: A hydraulic machine. A high pressure line allows working fluid to flow into a hydraulic motor. A low pressure line allows working fluid to flow out of the hydraulic motor. High pressure line valves open and close the high pressure line. Low pressure line valves open and close the low pressure line. An operator input device inputs a command to control movement of the hydraulic motor. A control unit controls the high pressure line valves and the low pressure line valves to be opened and closed by receiving the command from the operator input device. The control unit controls the high pressure line valves to have a normalized flow factor KvHP, and controls the low pressure line valves to have a normalized flow factor KvLP, where KvLP<KvHP when a normalized flow factor Kvcmd corresponding to the command is 0<Kvcmd<1.

Abstract: There is provided a work machine which can improve accuracy of control of an actuator when a pressure difference between a hydraulic pump and the actuator is large and the demanded flow rate of the actuator is small. An auxiliary flow rate controller is configured such that an opening area of a main valve changes between a maximum opening area and zero according to the opening area of a pilot variable restrictor when the opening area of the pilot variable restrictor is equal to or more than a predetermined opening area and that the opening area of the main valve is zero irrespective of the opening area of the pilot variable restrictor when the opening area of the pilot variable restrictor is less than the predetermined opening area.

Abstract: A hydraulic system for a working machine includes a hydraulic actuator configured to be operated by operation fluid, a control valve connected to the hydraulic actuator, and a communication fluid line for fluid communication between the hydraulic actuator and the control valve. The control valve includes a first supply path to guide the operation fluid toward the hydraulic actuator; a regeneration path to guide the operation fluid having been returned to the control valve from the hydraulic actuator, to the first supply path; and a branched path that branches from the regeneration path and supplies operation fluid to outside of the control valve.

Abstract: The invention relates to a pump arrangement (1) with at least one temperature-controllable housing part, wherein at least one temperature-controllable housing part (3) comprises a first wall (27) that is in contact with the temperature-controllable medium and a second wall (28) that is at a distance from the first wall (27). The first wall (27) and the second wall (28) form a temperature control chamber (29).

Abstract: The present disclosure relates to an integrated hydraulic power device and a fire truck. The integrated hydraulic power device includes: an integrated valve including a valve body having an internal flow passage structure, a first mounting end and a second mounting end; a motor fixedly arranged at the first mounting end; a hydraulic oil tank fixedly arranged at the second mounting end; and a hydraulic pump located within the hydraulic oil tank and in drive connection with the motor, wherein the hydraulic pump has an oil suction port for drawing oil from the hydraulic oil tank, and the internal flow passage structure is communicated with the hydraulic oil tank and the hydraulic pump.

Abstract: A hydraulic operating device for a cooling fan of a utility vehicle includes a hydraulic motor and a fan assembly, which can be driven by the hydraulic motor for generating a cooling air stream. A hydraulic supply is adjustable in terms of its delivery volume in accordance with pressure feedback for providing pressurized hydraulic liquid. A control valve for setting, in a manner dependent on a control signal that represents a cooling demand, a volume flow that passes through the hydraulic motor, with a sensor line that is branched off in a supply line between the control valve and the hydraulic motor leading to a pressure control inlet of the hydraulic supply.

Abstract: Methods and systems for a transmission are provided herein. In one example, a hydraulic system is provided that includes a boost pump, a relief valve in fluidic communication with the boost pump and a reservoir, and a plurality of control valves in fluidic communication with the boost pump, positioned downstream of the relief valve, and in fluidic communication with a plurality of hydraulic devices. The hydraulic system further includes a controller designed to actively adjust a position of the relief valve based on an aggregate hydraulic pressure demand of the plurality of hydraulic devices to alter a boost pressure of a hydraulic fluid supplied to the plurality of control valves.

Abstract: An oil pressure motor unit according to an aspect of the disclosure includes: an oil pressure motor having an output shaft and a brake; a two-speed switching valve for switching a speed of the output shaft; and a brake release actuator for releasing braking of the brake. The oil pressure motor is connected to a first channel and a second channel each conveying a hydraulic fluid for driving. One of the hydraulic fluids conveyed by the first channel and the second channel conveyed under a lower pressure is supplied separately to the brake release actuator and the two-speed switching valve.