Abstract: A system for generating power includes a supervisory control and data acquisition (SCADA) system that provides control commands to a plurality of turbine controllers to cause a windfarm to output power at a level within power parameters in a setpoint. Each turbine controller is installed at a corresponding wind turbine of a plurality of wind turbines in the windfarm. The system also includes a backup system comprising a programmable logic controller (PLC). The PLC receives turbine state information from the SCADA system that characterizes an operational state of each of the plurality of wind turbines in the windfarm and detects that the SCADA system is offline. The PLC also selectively provides start and stop commands to a plurality of terminal interface units (TIUs) to cause the windfarm to output power at a level within the power parameters identified in the setpoint in response to the detecting.

Abstract: Provided is a transition piece for a wind turbine, to connect a wind turbine to a foundation, wherein the transition piece includes a connection area to be connected to a foundation.

Abstract: An annular seal member comprising a seal body comprising a locating portion locatable against a wall element of an offshore structure, an inner surface, an outer surface and a lip portion that defines an open mouth of the seal member for receiving an elongate element therethrough; wherein the seal body is locatable against the wall element such that when a static pressure acting on the outer surface of the seal body exceeds a static pressure acting on the inner surface of the seal body a net positive pressure is exerted on the outer surface which at least partly deforms inwardly to provide a portion of the seal body for sealing against an outer surface of the elongate element. An offshore structure.

Abstract: A system, a method and a tool kit are provided including an apparatus on a wire, for example for cleaning or repairing a wind turbine blade. The apparatus includes a base and an arm, the arm extending from the base and including a remote end, the remote end and the base, each including an attachment device for securing to a surface.

Abstract: A water pumping system, a motor drive, and a method of starting pumping by the motor drive. The method includes powering the electric motor with a motor drive; driving a progressive cavity pump with the electric motor; monitoring a speed difference between an electrical speed and an observed speed of a rotor of the electric motor; and performing a protective action as a function of the speed difference.

Abstract: A pump system includes: first and second flow paths connected with a common inlet and a common outlet, and disposed in parallel with each other; the first flow path having a first aspirate valve, a first pump in series with and downstream of the first aspirate valve, and a first dispense valve in series with and downstream of the first pump; the second flow path having a second aspirate valve, a second pump in series with and downstream of the second aspirate valve, and a second dispense valve in series with and downstream of the second pump; the first aspirate valve, the first pump, and the first dispense valve of the first flow path, being configured to operate in both a dispense and aspirate modes; the second aspirate valve, the second pump, and the second dispense valve of the second flow path, being configured to operate in both a dispense and aspirate modes.

Abstract: A pumping system pumps material downhole, for example, to perform a fracturing operation. The pumping system comprises one or more variable speed engines, one or more variable displacement hydraulic pumps and one or more intensifiers. According to the desired or required load, the speed of the engine is set at an optimal or most efficient operating speed. The volumetric displacement of the variable displacement hydraulic pump is set to provide the desired output volume and pressure of the material from the intensifier. Varying the speed of the engine and the volumetric displacement of the variable displacement pump allows for the pumping system and in particular the engine to operate at an optimal efficiency which reduces at least fuel costs and wear and tear on components.

Abstract: There is provided a technology for properly preventing an insulation member from melting during welding without reducing the efficiency of a motor. A compressor includes: a motor including a shaft, a rotor fixed to the shaft, and a stator surrounding the rotor; a compression unit that compresses a refrigerant as a result of rotation of the shaft; and a shell that houses the shaft, the motor, and the compression unit therein. The stator includes a stator core including an annular back yoke portion, a plurality of teeth portions, and slots formed between adjacent teeth portions, coils wound around the plurality of teeth portions, an insulation member that is disposed in the slots and interposed between the stator core and the coils to insulate the stator core and the coils, and at least one projection portion that forms a gap.

Abstract: A one-way valve device for air compressors including a disc-shaped element having a plurality of holes for flow of the air distributed along a portion having a circular crown extension, a sheet superposed on the disc-shaped element for occluding the holes, the sheet being susceptible to lifting due to the pushing action exerted by the air flowing through the holes, a spring opposing the lifting of the sheet, a containment and covering dome.

Abstract: A compressor includes a housing, and an anticorrosive coating covering a surface of the housing. The anticorrosive coating includes a base layer applied on the surface of the housing, and a surface layer applied on the base layer. Both the base layer and the surface layer are organic coatings. Thus, the housing of the compressor is effectively separated from the external environment by means of the two organic coatings, so as to ensure that the compressor is not corroded; moreover, the anticorrosive coating does not contain a metal coating, thereby preventing the problem of the compressor being severely corroded due to an exposed metal coating.

Abstract: Provided is a liquid pump configured to suppress discharge of air from an air pool formed in a discharge-side tank. A discharge-side tank part formed in a housing has a first inner wall surface and a second inner wall surface facing each other in a horizontal direction in an installed position of the liquid pump. The first inner wall surface is formed with a discharge port, and the second inner wall surface is formed with an opening of a discharge-side communicating passage. An air pool is formed in a space in the discharge-side tank part above the opening of the discharge-side communicating passage and the discharge port. A circular cylindrical partition is provided in the discharge-side tank part. The circular cylindrical partition projects from the second inner wall surface toward the first inner wall surface with at least a portion of the cylindrical partition positioned above the opening of the discharge-side communicating passage so as to cover the opening as seen from the air pool side.

Abstract: A peristaltic pump and related-method are disclosed that includes a cam shaft having a plunger cam, a plunger-cam follower that engages the plunger cam of the cam shaft, a tube receiver, a spring, a plunger, a position sensor, and a processor. The tube receiver receives a tube. The spring provides a bias. The plunger is biased toward the tube by the spring and the plunger is to the plunger-cam follower, such that expansion of the plunger cam along a radial angle intersecting the plunger-cam follower as the cam shaft rotates actuates the plunger away from the tube. The position sensor determines a position of the plunger and the processor estimates fluid flow within the tube utilizing the position of the plunger.

Abstract: An additive pump is configured to collect migrant additive that penetrates into its reciprocating shaft. These configurations may include a pump head, an actuator that penetrates into the pump head, a sealed region disposed about the actuator to form a fluid-free zone, and a fluid sensing unit coupled with the sealed region, the fluid sensing unit comprising a receptacle that is configured to retain fluid that transits from inside the sealed region.

Abstract: A diaphragm pump includes: a housing; a diaphragm; an actuator configured to reciprocate the diaphragm based on a previously selected operation mode out of a plurality of operation modes; a setting device configured to set and send an operation mode and operating conditions; and a control device configured to receive the operation mode and the operating conditions from the setting device, and control the actuator to move the diaphragm forward or backward in accordance with the operation mode and the operating conditions received from the setting device. The plurality of operation modes include a normal operation mode in which the actuator is driven to perform a series of a suction process to suck a fluid and a discharge process to discharge the sucked fluid, and a partial operation mode in which the actuator is driven to perform the series of processes partially.

Abstract: The present invention is directed to a method for controlling the outlet temperature of an oil injected compressor or vacuum pump comprising a compressor or vacuum element provided with a gas inlet, an element outlet, and an oil inlet, said method comprising the steps of: measuring the outlet temperature at the element outlet; and controlling the position of a regulating valve in order to regulate the flow of oil flowing through a cooling unit connected to said oil inlet; whereby the step of controlling the position of the regulating valve involves applying a fuzzy logic algorithm on the measured outlet temperature; and in that the method further comprises the step of controlling the speed of a fan cooling the oil flowing through the cooling unit by applying the fuzzy logic algorithm and further based on the position of the regulating valve.

Abstract: Disclosed is a gerotor pump including an inner gear mounted on a first axis, an outer gear mounted on a second axis and meshing internally with the inner gear in an offset manner, and an electrical motor including a rotor and a stator having a radial gap therebetween in a radial direction. The pump also includes a spindle fixedly coupled to the outer gear to facilitate maintaining the radial gap. The spindle is rotatably coupled for rotation about the second axis. The spindle aids in maintaining a consistent radial gap during operation of the gerotor pump. The inner gear may be coupled to a drive shaft for driving the gears. The gerotor pump may be driven via an electric or mechanical driver. A pressure plate may also be positioned adjacent the gerotor gears and within the housing. The spindle and pressure plate help secure the pump parts both axially and radially.

Abstract: The invention relates to a screw pump (1), in particular a double screw pump, s comprising a multiple-piece housing (2, 7, 15, 21) and at least two coupled rotors (3, 3a) which form chambers with in each case at least one thread-shaped profile (4, 4a) which is configured at least in regions with helical channels (5, 5a) and with dividing walls (6, 6a) which delimit the channels (5, 5a), wherein the rotors (3, 3a) perform an opposed rotor rotation, and the dividing walls (6, 6a) engage into one another in a gearwheel-like manner, a running housing part (7), wherein the running housing part (7) encloses the rotors (3, 3a) without contact, wherein the rotors (3, 3a) form, with the running housing part (7), at least one conveying chamber (8, 8a) for the fluid to be conveyed, wherein the conveying chamber (8, 8a) migrates axially along the rotor axis (10, 10a) and conveys the fluid from a suction chamber (11) into a pressure chamber (12), a suction-side connector element (13) which is connected fluidically to the

Abstract: A gerotor pump assembly, and a system and method for operating a gerotor pump assembly, result in a lubrication strategy for operating in a loss-of-prime mode. An inner drive gear may be rotated in a first direction and in a second opposite direction about an axis of rotation. The inner drive gear has a number of projections extending outwardly therefrom. An outer driven gear surrounds the inner drive gear and defines a number of recessions along an inner surface configured to engage with the projections of the inner drive gear. The outer driven gear and the inner drive gear further define at least one dynamically-changing fluid cavity therebetween. The inner drive gear and the outer driven gear define an oil transfer volume clearance between a projection and a recession in a fully engaged position. Oil is maintained within the oil transfer volume clearance as the inner drive gear is rotated.

Abstract: Disclosed is a rotating cylinder enthalpy-adding piston compressor. The compressor is a two-stage rotating cylinder piston compressor, including a first-stage rotating gas cylinder, a first gas cylinder liner, a first piston, and a second-stage rotating gas cylinder, a second gas cylinder liner, and a second piston, and further including an enthalpy-adding assembly connected between the first-stage rotating gas cylinder and the second-stage rotating gas cylinder for supplying gas and adding enthalpy between the two stages of rotating cylinders.

Abstract: A system for a utility vehicle has a compressor, an electric motor and an electronic drive system. The electric motor drives the compressor. The electric motor and the electronic drive system have a common housing. The electric motor has a rotor which at least partially surrounds the drive shaft of the compressor.

Abstract: A compressor system includes a screw compressor (48) and a controller (100). The screw compressor includes a slide valve (49) selectively actuatable between a first position and a second position to facilitate modulating a capacity of the screw compressor between fully-loaded and fully-unloaded. The controller is communicably coupled to the slide valve. The controller is configured to receive a chilled fluid temperature setpoint for a fluid in heat transfer communication with a refrigerant of the refrigeration circuit; receive temperature data indicative of a chilled fluid temperature of the fluid; determine a difference between the chilled fluid temperature and the chilled fluid temperature setpoint; and provide one of a load command and an unload command to the slide valve based the difference between the chilled fluid temperature and the chilled fluid temperature setpoint.

Abstract: A scroll compressor according to the present invention includes a casing, an orbiting member provided within the casing and performing an orbiting motion, a non-orbiting member forming a compression chamber together with the orbiting member, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber, a communication passage communicating inside and outside of the compression chamber with each other, an opening/closing valve assembly provided outside the non-orbiting member within the casing and opening and closing the communication passage, and a switching valve assembly provided within the casing and operating the opening/closing valve assembly, whereby a facilitated fabrication, improved valve responsiveness and a relaxed restriction for a specification of a valve can be achieved, and also an over-compression can be prevented by an installation of a check valve, and an assembling efficiency can be improved by installing two valve assemblies outside the non-orb

Abstract: Disclosed is a crank shaft, including a central rotation shaft, a first eccentric component, a second eccentric component, a disc partition plate and an annular partition plate, wherein the disc partition plate is disposed between the first eccentric component and the second eccentric component, and is integrally formed with the central rotation shaft, and the annular partition plate is sleeved outside the disc partition plate. The crank shaft can prevent the occurrence of leakage between the partition plate and a roller while increasing an eccentricity of the crank shaft and improving operating performances of a compressor. Further disclosed are a pump body assembly having the crank shaft and a compressor.

Abstract: An anti-locking mechanism of a spherical compressor rotor, an anti-locking power mechanism of a spherical compressor, and a spherical compressor. A pin boss is fixedly arranged on a turntable shaft, and guide pins are movably connected with a guide sleeve. A concave slideway is arranged in a cylinder block spherical surface or a cylinder lower spherical surface, and is distributed along a sliding track of the guide sleeve on the corresponding cylinder block spherical surface or cylinder lower spherical surface in a rotation process of a turntable. A main shaft rotates and drives the turntable. When the turntable rotates to a position at which a turntable axis and a piston axis are superposed, the turntable can continue to rotate around the turntable axis by means of torque obtained by the guide pin from the concave slideway, and thus a problem of a dead point of movement of a spherical compressor rotor is solved.

Abstract: The invention relates to a method of venting a synthetically commutated hydraulic pump (2). The connecting fluid conduits (8, 16), connecting said synthetically commutated hydraulic pump (2) with a fluid reservoir (7) is vented at least on start-up of the synthetically commutated hydraulic pump (2), using a fluid intake device (14, 17, 20) that connects to a fixed displacement pump (3).

Abstract: In a pump device, in a flat plate-shaped circuit board that is disposed so that the axial direction of a central rotating shaft and the thickness direction coincide with each other, a notch that a cut-out from an end face of the circuit board toward an inside of the circuit board is formed. In the vicinity of the notch on a surface of the circuit board, a solder land where a plurality of core wires that are exposed on the distal end side of a lead wire are fixed by soldering is formed. In the pump device, the distal end portion of a cover portion including the distal end of the cover portion of the lead wire drawn out from the circuit board is disposed in the notch.

Abstract: A pump device is provided. In the pump device, a bottom portion of a case body with a suction port formed therein is provided with a through-hole through which a fluid sucked through the suction port passes, and the case body is provided with a shaft holding portion holding the lower end of the fixed shaft and a plurality of connection portions disposed with a space interposed therebetween in the circumferential direction of the rotor so as to surround the through-hole and connecting the shaft holding portion and the bottom portion. The upper end side of the connection portion is provided with a protrusion protruding upward beyond the upper end surface of the shaft holding portion, and at least one of the protrusions is a rotation preventing portion that prevents rotation of the thrust bearing in the circumferential direction of the rotor.

Abstract: A pump device is provided. In the pump device, in a first wall portion of an insulator configured to surround an inner partition wall portion arranged on an inner peripheral side of a stator core and to prevent a winding of a driving coil from collapsing, there is provided a first notch cut out from an end surface on a Z2 direction side of the first wall portion toward a Z1 direction side. And, in a second wall portion of an insulator configured to surround an inner partition wall portion and to prevent a winding of a driving coil from collapsing, there is provided a second notch cut out from an end surface on a Z1 direction side of the second wall portion toward a Z2 direction side.

Abstract: A combined sump pump with a backup pump structure includes a primary pump, a check valve device for the primary pump, a pipeline connection device arranged on one side of the primary pump and the backup pump, a backup pump, and a check valve device for the backup pump; the primary pump and the pipeline connection device are connected by the check valve of the primary pump, the backup pump and the pipeline connection device are connected by the check valve of the backup pump; the primary pump is equipped with a primary pump float switch, a primary pump float ball is provided under the primary pump float switch, a backup pump hoop is provided on the pipeline connection device, a backup pump float switch is provided on the backup pump hoop, and a backup pump float ball is provided under the backup pump float switch.

Abstract: A rotary machine includes a first flange in which a first hole portion is formed, a second flange disposed to face the first flange via an abutting surface and having a second hole portion formed therein, and a stud bolt inserted into a first hole portion and a second hole portion and fastened to a female screw of the second hole portion, wherein the thickness of the second flange is larger than the thickness of the first flange.

Abstract: In a vacuum pump, the proportion of hole portions at a distal end (outer peripheral side/outer peripheral portion) of a stator disc is locally increased. More specifically, hole portions of substantially the same size are provided in parallel from the inner peripheral side to the outer peripheral side of the stator disc, and the number of hole portions provided in the outermost row is set to be larger than the number of hole portions provided in an inner row. Hole portions of substantially the same size are provided in parallel from the inner peripheral side to the outer peripheral side of the stator disc, and some of hole portions provided in the outermost row are integrated to be a single hole portion. T-shaped hole portions are provided in the stator disc. L-shaped hole portions are provided in the stator disc.

Abstract: A magnetic levitation control device comprises: a control signal generation section configured to generate a first excitation current control signal based on current deviation information on the excitation current detection signal with respect to the current setting signal and a second excitation current control signal based on the current setting signal; and a selection section including a first switching section configured to select either one of the first excitation current control signal or the second excitation current control signal or a second switching section configured to select either one of a third excitation current control signal obtained by summation of the first excitation current control signal and the second excitation current control signal or the second excitation current control signal. The excitation amplifier is PWM-controlled based on the excitation current control signal selected by the selection section.

Abstract: The present disclosure provides a system and method for controlling a plurality of cooling fan modules using a management controller and a multiplex switch. The multiplex switch connects the management controller to the plurality of cooling fan modules. The multiplex switch can enable the management controller to select a specific cooling fan module from the plurality of cooling fan modules. Once the specific cooling fan module is selected, the multiplex switch can connect to the specific cooling fan module, enable the management controller to monitor operating characteristics of the specific cooling fan module, and control power or current being delivered to the specific cooling fan module.

Abstract: An air conditioner for a vehicle includes a blower motor and a blower control unit integrated so that terminals therebetween can be easily connected and a PCB is closely fixed to a flange with stronger power. The air conditioner includes: a blower unit having a blower motor driving a blower wheel to blow wind to the inside of an air-conditioning case; a blower control unit controlling the blower motor to control rotation of the blower wheel; a flange on which the blower motor is fixed and to which a PCB of the blower control unit is joined to one side of the blower motor; a first terminal associated with the blower motor; and a second terminal associated with the PCB and which is combined with the first terminal, wherein the blower control unit and the blower motor are formed integrally to the blower unit.

Abstract: A pump unit includes a pump housing having a valve assembly positioned on a wall thereof and adapted to be coupled to an inflatable device, and an air control assembly that is housed inside the pump housing. The air control assembly includes an impeller section that houses an impeller, and has an air inlet and an air outlet. The air control assembly further includes a motor housing that houses a motor, the motor housing having an air vent that communicates the interior of the motor housing with the air inlet and the air outlet, and a vent opening that communicates the interior of the motor housing to the environment. The air outlet is aligned with the valve assembly when the pump unit is operated in the inflation mode, and the air inlet is aligned with the valve assembly when the pump unit is operated in the deflation mode.

Abstract: An example centrifugal compressor includes a housing that defines an inlet chamber and includes first and second openings that define a recirculation passage in fluid communication with the inlet chamber. An impeller is disposed within the housing and is rotatable about a longitudinal axis to draw fluid into the inlet chamber. The first and second openings are at different axial locations along the longitudinal axis. A plurality of inlet guide vanes are rotatable and situated in the inlet chamber. The centrifugal compressor includes a ring and a controller for moving the ring along the longitudinal axis between a first position and a second position when rotating the inlet guide vanes. The ring obstructs at least one of the first and second openings more in the second position than in the first position.

Abstract: The Modular turbo compressor shaft (4) comprise a tubular bearing portion (5) having a first axial end portion and a second axial end portion; an impeller portion (6) arranged at the first axial end portion of the tubular bearing portion (5); and a driving portion (7) arranged at the second axial end portion of the tubular bearing portion (5). The tubular bearing portion (5) is made of a hard material, and the impeller portion (6) and/or the driving portion (7) are made of relatively soft material compared to the hard material of the tubular bearing portion (5). The impeller portion (6) and/or the driving portion (7) are at least partially extending into the tubular bearing portion (5) and are firmly connected to the tubular bearing portion (5).

Abstract: The invention proposes a fan, in particular for a turbomachine of small size such as a jet engine, having a hub ratio which corresponds to the ratio of the diameter of the inner limit of the incoming air stream at the radially inner ends of the leading edges of the fan blades, divided by the diameter of the circle around which the outer ends of the fan blades pass, having a value of between 0.20 and 0.265.

Abstract: A fan rotor blade comprises an outer covering member and a metal core body. The outer covering member is made of a composite material including a thermoplastic resin and reinforcing fibers. The outer covering member has a shape of a blade surface having a positive pressure surface and a negative pressure surface. The metal core body is arranged between the positive pressure surface and the negative pressure surface. The metal core body has a hollow structure.

Abstract: The disclosure provides a heat dissipation device, including an enclosure, a connective member, and a fan module. The enclosure includes a first cover body and a second cover body that are opposite to each other. The second cover body includes an opening. The connective member is connected to one of the first cover body and the second cover body in the enclosure. The fan module is movably connected to the connective member, and is configured to move between a first position and a second position relative to the enclosure based on the connective member. When moving to the first position, the fan module is located in the enclosure.

Abstract: This disclosure provides a fan, including a first case, a second case, and a reset mechanism. The first case includes a first side wall, where the first side wall has a first guide portion. The second case includes a second side wall, where the second side wall has a second guide portion. The first guide portion and the second guide portion are slidably joined and are configured to enable the first case and the second case to move toward or away from each other. The reset mechanism is connected to the first case and is configured to push the second case to move away from the first case.

Abstract: A diffuser for a centrifugal compressor and a centrifugal compressor having the same. The diffuser (100) comprises a drive component (110), a transmission assembly (120), an adjustment assembly (130), a spool valve assembly (140) and a rear wall (150); wherein the transmission assembly is used for transmitting power produced by the drive component to the adjustment assembly, the adjustment assembly is capable of circumferentially reciprocating with respect to the rear wall and driving the spool valve assembly to reciprocate axially; and wherein a rolling element (160) is provided between the adjustment assembly and the rear wall. Intervention of a mechanism for adjusting a flow passage width is better achieved by such an arrangement in combination with an existing configuration of the diffuser; and a low-friction fit between the adjustment assembly and the rear wall is achieved by the rolling element.

Abstract: A fan optimizing acoustic characteristics includes a yoke adapted to secure the fan to a building member and a central support structure extending from the yoke. The central support structure is an elongated member having a first end and a second end, the first end being selectively secured to the yoke and the second end extending downwardly therefrom. A fan assembly is secured to the second end of the central support structure. The fan also includes a plurality of sound absorbing elements.

Abstract: A valve assembly for an inflation system that includes a pressure relief valve and a vent valve. The pressure relief valve has a pressure relief housing and a pressure relief valve poppet. The pressure relief housing defines a first pressure relief cavity that is disposed between a first end wall defining a first flow port and a first wall defining a passageway and a second pressure relief cavity disposed between the first wall and a second wall. The pressure relief valve poppet is movably disposed within the first pressure relief cavity and the second pressure relief cavity. The vent valve has a vent housing and a vent valve poppet. The vent housing defines a vent cavity that is disposed between the second wall defining a vent flow port and a second end wall. The vent valve poppet is movably disposed within the vent cavity.

Abstract: An aspirator may comprise an aspirator body defining an air channel and an inlet at a proximate end of the aspirator, and an inflatable barrel coupled to the aspirator body and defining an outlet at a distal end of the aspirator, wherein the inflatable barrel comprises a helical coil having a first interior volume and coupled about a barrel liner, wherein the barrel liner defines a second interior volume, wherein the air channel and the second interior volume define an airflow path extending from the air channel through the second interior volume the inflatable barrel.

Abstract: This invention uses atmospheric pressure and gravity, only to power a new energy system. Renewable, clean energy from new sources is much needed in the U.S. and the world today. Many possible locations exist in the U.S. that this new system can be installed. If the potential of this new system is fulfilled, the country's economy will benefit greatly over the next many years. Thousands of permanent jobs will be created.

Abstract: A hydraulic valve assembly includes a first spool valve and a first selector valve for actuating a first hydraulic consumer port or a second hydraulic consumer port, and a second spool valve and a second selector valve for actuating a third hydraulic consumer port or a fourth hydraulic consumer port. A shut-off valve is arranged in a common pressure channel. A branch channel with first and second pressure branch channels branches off the pressure channel upstream of the shut-off valve. The first selector valve connects the first pressure branch channel to a first connection line in a first switching position and connects the second pressure branch channel to a second connection line in a second switching position. The second selector valve, in a first switching position, connects the first connection line to the control channel and, in a second switching position, connects the second connection line to the control channel.

Abstract: The invention relates to a discharge pressure scale (30) consisting of at least one valve housing (41) having at least three fluid connection points in the form of a functional connector (A), a return flow connector (T) and a control connector (28), wherein a valve piston (52) is guided such that it moves longitudinally against the effect of an energy accumulator (42), moving from a respective opening or regulating position, against a valve seat (94), into a closed position, wherein the control (28) and return flow connectors (T) are separated from one another, characterised in that the fluid pressure present at the control connector (28) can be guided onto a pressure-active surface (A1*) of the valve piston (52) by means of a pressure compensation device (70) in such a way that it moves into its respective opening or regulating position in a pressure-compensated manner due to the force of the energy accumulator (42).

Abstract: A shaft extending along a longitudinal axis has fluid channels that increase and decrease pressure in chambers formed between the interior ends of curved pistons and adjacent closed ends of curved chambers within which the pistons reciprocate as the chamber pressure increases and decreases. The chambers and pistons are in separate cylinder block segments extending outward from opposing sides of the shaft. Each segment may have two sides extending along radial planes and joined by a curved outer surface. Pistons may be provided in pairs and have an interior piston end of each piston in a different cavity in different segments. Exterior ends of each piston in a pair of pistons are connected to a piston connector that extends inwardly from a housing so the housing rotates with the pistons.

Abstract: The present disclosure is directed towards electro-fluid transducers that may influence the flow of a fluid in and around a channel. In one such embodiment, a system comprises a first electrode at least partially encapsulated by a first dielectric; a second electrode at least partially encapsulated by a second dielectric, wherein a portion of a channel exists between the first dielectric and the second dielectric; a third electrode positioned in the channel; and a fourth electrode positioned in the channel, wherein the electrodes influence a flow of a fluid in the channel upon the electrodes being energized.