Abstract: A method and system is provided for controlling a hydraulic actuator in a work machine by opening a load holding valve in a measured fashion in order to leak hydraulic pressure back into a depressurized portion of the hydraulic circuit, thereby minimizing or eliminating jerkiness in the actuator when the actuator is under an external load.

Abstract: A method for assembling an actuating ram of air bleed valves, which ram is placed between low pressure and high pressure compressors of a turbomachine, the ram including a piston rod surrounded by a spacer extending from the piston cylinder and configured to be connected to an end of the transmission mechanism linked to the bleed valves, the method including: deploying the piston rod such that it projects from the spacer; connecting the projecting piston rod to the end of the transmission mechanism; retracting the piston rod to bring the cylinder closer to the case wall; and attaching the spacer to the case wall.

Abstract: A variable stator vane arrangement includes a casing, a plurality of stator vanes, at least one control ring, a plurality of connecting rods and a crankshaft. The stator vanes are circumferentially spaced apart in the casing and the plurality of stator vanes are rotatably mounted in the casing. Each control ring is rotatably mounted on the casing and each stator vane is connected to an associated control ring. The crankshaft, rotatably mounted on the casing, is drivingly connected to each control ring and has an axis and a plurality of clevizes. Each connecting rod connects one of the clevizes on the crankshaft to a respective one of the control rings. At least one clevis is adjustably secured to the crankshaft by an adjusting mechanism and the adjusting mechanism is used to select the radial and/or angular position of at least one clevis relative to the axis of the crankshaft.

Abstract: An engine system utilizing a hydraulic pressure includes an engine, a hydraulic system having at least one hydraulic pump discharging a hydraulic oil for operating an actuator and a hydraulic oil tank storing the hydraulic oil returned from the actuator, a hydraulic power transmission device connected to a hydraulic line between the hydraulic pump and the hydraulic oil tank and configured to transmit a hydraulic pressure of the hydraulic oil as a driving source, and a vehicular auxiliary device driven by using the hydraulic pressure transmitted from the hydraulic power transmission device as the driving source.

Abstract: A phaser valve for a piston and cylinder assembly helps to keep a pair of pistons in phase with each other. The phaser valve includes a poppet which is slidable between opposing seats of a valve housing. The poppet includes a head and a stem, both the head and the stem having concave portions which facilitate the flow of hydraulic fluid across the valve. The poppet head has two generally conical ends, so that the head makes a fluid-tight seal with a seat when the head is urged towards either seat. Due to its construction, the phaser valve may be built to fit within a very small space, while still allowing a substantial flow of fluid when the head is not in abutment with one of the seats.

Abstract: A compressor component having an airfoil with a profile in accordance with Table 1 is disclosed. The compressor component, such as a compressor blade, has an increased surface area over a portion of the airfoil chord length. The increased surface area allows for a greater amount of air to be taken in by the airfoil, thus increasing the air flow through the gas turbine engine.

Abstract: The invention relates to a backing plate used for an elastomeric bearing system, the backing plate comprising a plate which defines an at least partial annulus about an axis, a motion limiter and a redundant pivot which extend from the plate so as to respond to a retainer plate disbond.

Abstract: A turbine bucket according to embodiments includes: a base; a blade coupled to the base, extending radially outward from the base, and including: a body having: a pressure side; a suction side opposing the pressure side; a leading edge between the pressure side and the suction side; and a trailing edge between the pressure side and the suction side on a side opposing the leading edge; and a plurality of radially extending cooling passageways within the body; and a shroud coupled to the blade radially outboard of the blade, including: a plurality of radially extending outlet passageways fluidly connected with a first set of the plurality of radially extending cooling passageways within the body; and an outlet path extending at least partially circumferentially through the shroud and fluidly connected with all of a second, distinct set of the plurality of radially extending cooling passageways within the body.

Abstract: A fan having a temperature detecting function includes a fan frame, an extension member, a temperature sensor and a restricting portion. The fan frame has an air inlet, an air outlet, and an impeller rotatably arranged between the air inlet and the air outlet. The extension member has one end adjacent to the fan frame. The temperature sensor is arranged at one of the air inlet and the air outlet via the extension member in a position where the surface of the temperature sensor is fully exposed to the ambient air. The restricting portion is arranged at the one of the air inlet or the air outlet. The restricting portion is located between the extension member and the impeller and is adapted to prevent the extension member from making contact with the impeller.

Abstract: To provide a hydraulic driving device configured to smoothly extend a hydraulic cylinder. The present invention includes the open circuit E, the closed circuit A, a control device 57, and a control lever 56a. The open circuit E is provided with a flow passage 202 for connecting an outlet port of the open circuit pump 13 and a head chamber 1a of the boom cylinder 1, a selector valve 44a provided in the flow passage 202, a discharge flow passage 404 for connecting a hydraulic fluid tank 25 and a flow passage 200, and a bleed-off valve 64 provided in the discharge flow passage 404. The control device 57 is configured in such a manner that when a manipulate signal for extending the boom cylinder 1 is input from the control lever 56a, the bleed-off valve 64 is closed, the selector valve 44a is subsequently opened, and the open circuit pump 13 is controlled.

Abstract: The present invention relates to a pulsation reduction apparatus of a hydraulic piston pump, comprising: a block housing that has one end connected to the first hydraulic circuit and the other end connected to the second hydraulic circuit; a damper that is embedded in the block housing, absorbs pressure resulting from working fluid introduced to the first hydraulic circuit, assists with pressure increase of the second hydraulic circuit, and allows shape deformation; and viscosity damping units that are embedded in the block housing, are arranged between the first hydraulic circuit and the damper and between the second hydraulic circuit and the damper, and reduce viscosity of the working fluid introduced from the first and second hydraulic circuits, thereby reducing pressure pulsation and stably performing shock absorption and pressure increase at the same time with a relatively simple configuration.

Abstract: A piston includes a disc formed to have an annular shape, a cylindrical skirt portion that projects from an outer peripheral portion of the disc on one end side in an axial direction of the disc, and a passage that is formed in the disc and that is opened on an inner side of the skirt portion. An inner peripheral surface of the skirt portion is a slope that increases its diameter toward a side opposite to the disc.

Abstract: An actuator arranged to be movable between an extended condition and a compressed condition and being biased to an intermediate condition between and distinct from the extended condition and the compressed condition. The actuator includes a damping device arranged to define the damping coefficient of the actuator.

Abstract: A control system may receive sensor data indicative of respective fluid levels of two or more hydraulic accumulators configured to operate at respective target fluid levels within a hydraulic system. The control system may determine respective errors of the hydraulic accumulators based on the respective fluid levels and respective target fluid levels of the hydraulic accumulators. The respective errors may correspond to pressure errors, fluid volume errors, or other types of errors of the hydraulic accumulators. Responsive to determining the respective errors, the control system may determine that the error of a given hydraulic accumulator is greater than errors of the other hydraulic accumulators and provide instructions to control a hydraulic valve to supply fluid from a single pump of the hydraulic system to the given hydraulic accumulator.

Abstract: A material handling machine includes an arm moveable relative to a chassis of the machine, a first hydraulic actuator operable to lift and lower the arm relative to the chassis, a ground engaging implement mounted on the arm and moveable relative to the arm, a second hydraulic actuator operable to move the ground engaging implement relative to the arm, the second hydraulic actuator having a pressured chamber, pressure within the pressure chamber being indicative of a force of engagement between the ground engaging implement and the ground, and a control system. The control system defines a target pressure for the pressure chamber, the control system being arranged such that when a pressure within the pressured chamber exceeds the target pressure the control system operates the first hydraulic actuator to lift the arm to reduce the force of engagement between the ground engaging implement and the ground.

Abstract: Support structures of a wind turbine, including a bearing housing that supports bearings that allow a rotor shaft to rotate about a rotor axis. The bearing housing may be constructed to minimize forces in the bearings in response moments that act on the rotor shaft about axes other than the rotor axis. The support structures of the wind turbine may also include a base to which the bearing housing may be mounted. The base may include features that minimize stress within the wind turbine structure and/or a yaw mechanism of the wind turbine in response to moments that act within the wind turbine about axes other than the rotor axis.

Abstract: A hydraulic circuit for a construction machine, capable of enhancing the effect of reducing a pressure loss due to return oil from a head-side chamber of a hydraulic cylinder, with a simple structure. The circuit includes a hydraulic cylinder, a control valve, a return pipeline, and a tank direct-communication line providing direct communication between the control valve and a tank separately from the return pipeline. The control valve has a flow path leading return oil from a head-side chamber of the hydraulic cylinder to the tank direct-communication line and a flow path leading return oil from a rod-side chamber of the hydraulic cylinder to the return pipeline.

Abstract: A hydraulic system for a working machine includes a hydraulic actuator and a first hydraulic machine for supplying fluid to the hydraulic actuator. The hydraulic system further includes a hydraulic transformer for supplying fluid to the hydraulic actuator in parallel with the first hydraulic machine, and an accumulator for fluid. The hydraulic transformer includes a first port and a second port and the transformer is adapted to transform a first pressure and a first flow at the first port to a second pressure and a second flow at the second port. The second port of the hydraulic transformer is in fluid communication with the hydraulic actuator and the first port is in communication with the accumulator.

Abstract: A fluid reservoir comprises a first compartment, a second compartment, a port, a drain, and a tube. The port is fluidly connected to the first compartment and positioned at a port height. The drain is fluidly connected to the first compartment and the second compartment. An entrance to the drain is positioned in the first compartment at a drain entrance height which is lower than the port height. The tube is fluidly connected to the first compartment and the second compartment. An entrance to the tube is positioned in the first compartment at a tube entrance height which is higher than the drain height.

Abstract: An exhaust-gas turbocharger (1) having a compressor (2) which has a compressor housing (3); having a turbine (4) which has a turbine housing (5); and having a charge-pressure regulating device (6). The charge-pressure regulating device (6) has at least two flap arrangements (7, 8) and two bypass duct openings (9, 10) assigned to the flap arrangements (7, 8).