Abstract: An engine component includes an intake manifold of stratified layers defining a plurality of runners each having a gas outlet leading to a cylinder head, and a plenum including partial walls forming channels radiating from a common gas inlet extending into a gooseneck conduit having an incorporated positive crankcase ventilation (PCV) apparatus. The gooseneck conduit transitions into the channels and runners such that there is no seal between the gooseneck, plenum, and runners.

Abstract: A resonator includes: an inner pipe having first openings penetrated into an outer peripheral surface thereof from an inner peripheral surface thereof and second openings spaced apart from the first opening; a first cover adapted to allow a first resonant space to be formed between the outer peripheral surface of the inner pipe and the inner peripheral surface thereof, the first resonant space communicating with the internal space of the inner pipe through the first openings; and a second cover adapted to allow a second resonant space to be formed between the outer peripheral surface of the inner pipe and the inner peripheral surface thereof, the second resonant space communicating with the internal space of the inner pipe through the second openings.

Abstract: A straddled vehicle includes an air cleaner and a resonator. The air cleaner includes an air cleaner case, an air-cleaning element arranged inside the air cleaner case, and a duct that is attached to the air-cleaning element. At least a portion of the duct is arranged inside the air cleaner case, and the duct guides the air toward the air-cleaning element. The resonator has an outer wall arranged around the duct. The duct and the outer wall together define at least a portion of a resonance chamber of the resonator.

Abstract: A fuel filter assembly includes a filter housing, a center stack, a top portion, a center stack base, and a fuel filter. The fuel filter includes a filter center support having a first portion extending along a first axial length, and a second portion extending along a second axial length, the first portion having a first inner diameter that is greater than a second inner diameter of the second portion, and having a first inner contact surface at the first inner diameter, and a filter base having an opening, the opening having an opening diameter and defining a second inner contact surface. When positioned within the filter housing, the fuel filter contacts the center stack at a first axial location and at the first inner contact surface, and it contacts a center stack base of the center stack at a second axial location and at the second inner contact surface.

Abstract: A system for protecting a high-pressure accumulator fuel injection system of an internal combustion engine against excessively high fuel pressures occurring in a high-pressure accumulator of the fuel injection system caused by a malfunction in the fuel injection, wherein the system comprises a member measuring the fuel pressure inside the high-pressure accumulator and sending information about this pressure to a control unit. An electrically controllable inlet valve to a pumping element of a high-pressure pump is included in the system and controlled by the control unit to be transferred to a continuously open or closed state, if the pressure measured exceeds a predetermined pressure level for stopping the feeding of fuel by the pumping element to the high-pressure accumulator.

Abstract: A switch control circuit controls a switch element connected to a primary coil of an ignition coil in accordance with an ignition signal. The switch element includes a transistor and a protection element connected between a collector and gate of the transistor. The switch control circuit uses a voltage at a gate terminal controlling the transistor or a voltage corresponding to a collector current of the transistor as a detection voltage and generates a status detection signal corresponding to a change in the detection voltage.

Abstract: The wind or marine energy capture system uses paragliders, elliptical or rhomboidal kites that are rotated, twisted or with fins on portions of their trailing or leading edges of the major edges and held at their ends by cables or cords, which by the action of the wind or water rotate around its axis and apply the rotational movement to an electric generator or mechanical element to move to the ground. Paragliders or elliptical kites, etc. they are directed by the wind automatically without having to apply any energy to it.

Abstract: A runner for a hydraulic turbine configured to reduce fish mortality. The runner includes a hub and a plurality of blades extending from the hub. Each blade includes a root connected to the hub and a tip opposite the root. Each blade further includes a leading edge opposite a trailing edge, and a ratio of a thickness of the leading edge to a diameter of the runner can range from about 0.06 to about 0.35. Further, each blade has a leading edge that is curved relative to a radial axis of the runner.

Abstract: A fluid flow actuated tool including a housing, a tool and an actuating mechanism. The housing includes a housing interior. The housing interior receives a flow of fluid. The actuating mechanism includes a fluid wheel structure. The fluid wheel structure is connected to the tool. At least a portion of the fluid wheel structure is arranged in the flow of fluid for rotating the fluid wheel structure. The tool is actuated based on rotation of the fluid wheel structure.

Abstract: A contactless magnetic support for a marine hydrokinetic energy harvesting system. The marine hydrokinetic energy harvesting system employing flow induced oscillations. The contactless magnetic support comprising a first ferromagnetic core; and a second ferromagnetic element being magnetically positioned relative to the first ferromagnetic core, the second ferromagnetic element being smaller compared to the first ferromagnetic core thereby inducing a non-homogenous magnetic field caused by dimensional disparity.

Abstract: Disclosed herein is a wave energy converter that uses a flexible and inflatable chamber to absorb wave energy and convert it to electrical energy through the varying hydrostatic and hydrodynamic pressure at or below the water surface.

Abstract: A Magnus rotor is provided. The Magnus rotor is located in a flowing fluid and driven to rotate by a power source. The Magnus rotor includes a Magnus rotor main body and a blade assembly. The Magnus rotor main body includes a cylinder side wall, a first end and a second end. The first end and the second end are disposed in one end and the other end of the cylinder side wall, respectively. The Magnus rotor is rotated around an axis connected between a first center point of the first end and a second center point of the second end. The blade assembly includes a plurality of blades which are disposed around the first end. Each blade is inclined toward a direction. A gap is formed between each two adjacent blades. Each gap is formed as a flowing channel for allowing the fluid to flow therethrough.

Abstract: A rotor blade for a wind turbine includes at least one blade segment defining an airfoil surface and an internal support structure. The internal support structure is formed, at least in part, of a first portion constructed of a first composite material and a second portion constructed of a different, second composite material, the second composite material arranged in a plurality of layers. The first and second portions are connected together via a scarf joint. Each of the plurality of layers of the second composite material includes an end that terminates at the scarf joint. The scarf joint includes a different, third composite material arranged between the first and second composite materials. The third composite material includes a plurality of segments, each of which is arranged so as to completely wrap the ends of the plurality of layers of the second composite material.

Abstract: Provided is an electrical connection system for a wind turbine blade that allows sharing the current between all conductors, in order to avoid voltage differences between them, avoiding internal sparks between pultruded plates, in a spar cap of the wind turbine blade. A second aspect is a wind turbine which in turn includes the wind turbine blade including the electrical bonding system. A third aspect is a method for electrically connecting conductive caps in a wind turbine blade.

Abstract: A vertical axis turbine includes a rotatable hub assembly that is configured to be connected to an energy sink and rotatable about an axis of rotation. At least two blades are mounted on the hub assembly, each blade including a leading edge and a trailing edge, the blades being oriented so that the respective leading edges face in a common rotational direction. Each blade further includes a straight section that is substantially parallel to the axis of rotation and two helical sections, the straight section being interposed between the helical sections, and the helical sections extending at least partially around the axis of rotation.

Abstract: A vertical axial wind power generator including blades rotated in a horizontal direction, and each blade includes inner and outer wind collection vanes, so that the blades can be operated without being limited by space and environment and can be rotated vertically by tiny wind. When wind power is lower than magnetic force of magnet on the blades and fastening disks, the blades enters an open status to increase windward area; when wind power is higher than the magnetic force, centrifugal force can force the blade to close to become a ball type, and blades of the ball type can have strong torsion effect, and only the windward area of the outer wind collection vane receive wind, so that rotation speed of the wind power generator can be stable. When wind power becomes weak, the blades can be rotated reversely to the open status.

Abstract: A wind turbine includes a hub rotatable about an axis and a blade coupled to the hub. The blade includes an inner blade portion having a first end and a second end. The inner blade portion is coupled to the hub at the first end and extends radially outward from the hub to the second end. The blade further includes an outer blade portion having a first end and a second end. The first end of the outer blade portion is pivotably coupled to the second end of the inner blade portion.

Abstract: A computing system is configured to detect irregular yawing at wind turbines. To this end, the computing system (i) for each respective turbine of an identified cluster of wind turbines: (a) obtains yaw-activity data indicative of the respective turbine's yaw activity during a window of time, and (b) based on obtained yaw-activity data, derives a yaw-activity-measure dataset having measures of the respective turbine's yaw activity during time intervals within the window of time, (ii) based on the respective yaw-activity-measure datasets for the turbines in the cluster, derives a cluster-level yaw-activity-measure dataset, (iii) evaluates the respective yaw-activity-measure dataset for one or more turbines in the cluster as compared to the cluster-level yaw-activity-measure dataset, (iv) based on the evaluation, identifies at least one turbine of the cluster that exhibited irregular yaw activity, and (v) transmits, to an output device, a notification of the irregular yaw activity at the at least one turbine.

Abstract: A multirotor wind turbine comprising a tower, a suspension arm, a nacelle, and a rotor carried by the nacelle and configured to rotate about a rotor axis to drive a drive train in the nacelle, wherein the tower holds the suspension arm, and the suspension arm holds the nacelle. To facilitate safer and better access to the nacelle or drive train, the suspension arm is configured as a platform to provide support for personnel e.g. during maintenance and repair of the nacelle.

Abstract: An apparatus includes first and second tanks each configured to receive and store a refrigerant under pressure. The apparatus also includes a cylinder defining a space configured to receive the refrigerant from the first and second tanks. The apparatus further includes a piston passing into the cylinder and having a head, where the head divides the space within the cylinder into a first volume for the refrigerant from the first tank and a second volume for the refrigerant from the second tank. In addition, the apparatus includes a converter configured to translate linear movement of the piston into rotational motion and a generator configured to produce electrical power based on the rotational motion.

Abstract: A shape memory alloy (SMA) actuator includes an SMA lifting tube that extends between a first end and a second end and that is configured to be in thermal communication with a process fluid during operative use of the SMA actuator. The SMA actuator is configured to assume a conformation among a plurality of conformations defined between and including a first conformation and a second conformation based, at least in part, on the temperature of the process fluid that is in thermal communication with the SMA lifting tube. The SMA lifting tube is configured such that the second end translates relative to the first end at least partially along a lateral direction that is at least substantially perpendicular to at least a portion of the SMA lifting tube between the first end and the second end as the SMA actuator transitions between the first conformation and the second conformation.

Abstract: A driving device having a base, a carrier, and a driving member is disclosed. The carrier is provided on the base and is movable up and down with respect to the base. The driving member includes a first end fixedly connected to the base and a second end opposite the first end fixedly connected to the carrier. The driving member further includes an intermediate portion between the first end and the second end. The intermediate portion is connected to the carrier and has a height difference in an up-down direction with respect to the first end. The driving member expands and contracts to drive the carrier to move up and down with respect to the base.

Abstract: A linear energy harvesting device that includes a housing and a piston that moves at least partially through the housing when it is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor drives an electric generator that produces electricity. Both the motor and generator are central to the device housing. Exemplary configurations are disclosed such as monotube, twin-tube, tri-tube and rotary based designs that each incorporates an integrated energy harvesting apparatus. By varying the electrical characteristics on an internal generator, the kinematic characteristics of the energy harvesting apparatus can be dynamically altered. In another mode, the apparatus can be used as an actuator to create linear movement.

Abstract: Non-limiting exemplary embodiments of a pumping system and methods for operating the pumping system in a region of high pressure or a region of high flow are disclosed. The pumping system includes a piston disposed within a piston cylinder, a drive shaft, an eccentric coupled to the drive shaft, a connecting arm having opposing first and second ends, and a controller for controlling the rotation of the drive shaft such that the piston oscillates within a region of high pressure or a region of high flow.

Abstract: A scroll device includes a fixed scroll with a first involute and a first cooling chamber; an orbiting scroll with a second involute and a second cooling chamber, the orbiting scroll mounted to the fixed scroll via a mechanical coupling, the orbiting scroll configured to orbit relative to the fixed scroll around an orbital axis; a flexible conduit in fluid communication with the first cooling chamber and the second cooling chamber, the flexible conduit extending around the orbital axis from a first side of the scroll device to a second side of the scroll device; and an integrated aftercooler.

Abstract: A micropump system (100) for a compressible fluid (102) includes a plurality of micropumps (110), rigid flow duct elements (120), a control unit (130), and one or two printed circuit boards (140). The micropumps have an intake opening (112) and an outlet opening (114). The rigid flow duct elements are connected to a respective micropump via a respective, elastically sealed port (122) and with the micropumps form a flow path (104) for the fluid. The one or two printed circuit boards are arranged and configured to electrically connect the control unit to the plurality of micropumps. Each micropump is rigidly fastened to the one or two printed circuit boards via a respective fastening device. A pressure build-up of the fluid flowing through the plurality of micropumps during the use, which is cascaded due to the plurality of micropumps, is provided at a system outlet (106) of the micropump system.

Abstract: A diaphragm compressor includes first structure having a first pressing part, a first diaphragm, and a first substrate partially separated from the first diaphragm and partially joined to the first diaphragm, a second structure having a second pressing part, a second diaphragm, and a second substrate partially separated from the second diaphragm and partially joined to the second diaphragm, the first structure and the second structure being stacked in a stacking direction in which the first diaphragm and the first substrate are stacked, wherein the first pressing part is placed at sides of the first diaphragm opposite to the first substrate, and a first separation portion between the first diaphragm and the first substrate is part of a first channel in which a fluid flows, the second pressing part is placed at sides of the second diaphragm opposite to the second substrate, and a second separation portion between the second diaphragm and the second substrate is part of a second channel in which a fluid flows,

Abstract: An integrated, portable, battery-powered, variable-pressure electric liquid pump and power emergency station including a remote wireless communication unit located remotely from and in wireless communication with the emergency station to improve wireless reception in the integrated, portable, battery-powered, variable-pressure electric liquid pump and power emergency station.

Abstract: An inflation device includes an air charging device and an air charging pipeline that includes an air conveyance channel and a first signal transmission line. The air conveyance channel has an air charging end combined with an air nozzle and is provided, on a portion thereof adjacent to the air nozzle, with a pressure transducer. An air entrance end of the air conveyance channel is connected to an air outlet port of the air charging device, and the first signal transmission line is electrically connected to the pressure transducer and a control circuit of the air charging device. The air nozzle is connectable with an inflatable object so that the pressure transducer is located adjacent to the inflatable object. When the pressure transducer detects an internal pressure of the inflatable object adjacent thereto is identical to a predetermined charging level, the air charging device is shut down.

Abstract: Disclosed is an energy-efficient vane pump which comprises a pump body. A drive shaft is arranged within the pump body. A rotor is fitted over the drive shaft. A stator is arranged besides the rotor. A plurality of vane grooves are arranged on the rotor. The vanes are evenly distributed between the rotor and the stator. A root end of the vane is located within the vane groove, and a tip end of the vane faces the stator. Side plates are arranged on both sides of the rotor. Each of the side, plate is provided with a high-pressure chamber and an oil outlet chamber. A communication channel is located on the side plate between the high-pressure chamber and the oil outlet chamber. The side plate is provided with a partition structure in the communication channel between the high-pressure chamber and the oil outlet chamber.

Abstract: A suction valve assembly for a compressor and a compressor having a suction valve assembly. The suction valve assembly may include a body that connects a compression chamber of the compressor with an accumulator, and a lifting/lowering valve provided in the body. The lifting/lowering valve may be moved upward by a pressure difference between an inner space of the accumulator and an inner space of the compression chamber when operation of the compressor stops and block reverse flow of oil to the accumulator. Accordingly, when operation of the compressor stops, compressed oil may be prevented from reversely flowing to the accumulator.

Abstract: The scroll compressor includes a fixed scroll; an orbiting scroll (8); a drive shaft (16); a support arrangement (5) on which is slidably mounted the orbiting scroll (8); a rotation preventing device configured to prevent rotation of the orbiting scroll (8) with respect to the fixed scroll, the rotation preventing device including orbital discs (28) respectively arranged in circular receiving holes (29) provided on the support arrangement (5), each orbital disc (28) being provided with an outer circumferential bearing surface (31) configured to cooperate with an inner circumferential bearing surface (32) provided on the respective circular receiving hole (29); and a lubrication system configured to lubricate the inner and outer circumferential bearing surfaces (32, 31) with oil supplied from an oil sump, the lubrication system including an oil reservoir (38) in which part of the oil supplied to the lubrication system is collected during operation of the scroll compressor, and a plurality of lubrication passag

Abstract: A scroll compressor includes a compressor housing, an orbiting scroll member, a non-orbiting scroll member, an economizer injection inlet, and a discharge outlet. The orbiting scroll member and the non-orbiting scroll member are disposed within the compressor housing. The orbiting scroll member and the non-orbiting scroll member are intermeshed thereby forming a compression chamber within the compressor housing. The non-orbiting scroll includes a plurality of compression inlet ports. An economizer injection inlet is formed through the compressor housing and in fluid communication with the compression chamber via the compression inlet ports. The discharge outlet is in fluid communication with the compression chamber.

Abstract: The present disclosure discloses a screw compressor and an air-conditioning unit, and relates to the field of compressors. The screw compressor has a first pressure level rotor assembly, a second pressure level rotor assembly and a body. The first pressure level rotor assembly has a first pressure level male rotor and a first pressure level female rotor; the second pressure level rotor assembly has a second pressure level male rotor and a second pressure level female rotor. Wherein, the first pressure level rotor assembly and the second pressure level rotor assembly are configured to enable an axial force received by the first pressure level rotor assembly and exerted by a compressed gas opposite to an axial force received by the second pressure level rotor assembly and exerted by a compressed gas. The force received during the operational process of the screw compressor is more balanced.

Abstract: A device evacuates a chamber and purifies the gas extracted from said chamber of any foreign substances. The device comprises a dry-condensing vacuum pump having an input connected to the chamber to be evacuated and is suitable for maintaining the input pressure at a constant level at the output despite variable conditions. An intermediate line which connects to the output of the dry-condensing vacuum pump and a liquid ring vacuum pump, the input of which is connected to the intermediate line, are additionally provided. A corresponding method makes it possible to purify the gas of any foreign substances reliably and effectively.

Abstract: A vacuum pumping system includes a vacuum pump and a motor for driving the vacuum pump. A motor stator and a motor rotor are received in a pumping chamber of the vacuum pump. Thanks to such arrangement, the vacuum pumping can be made as a single, sealed unit and the need for dynamic seals can be avoided. Moreover, the vacuum pumping system can be more compact and lighter than prior vacuum pumping systems. A pump rotor of the vacuum pump may be at least partially made as a hollow body, and the motor may be received inside the pump rotor.

Abstract: A scroll compressor includes a compressor housing, an orbiting scroll member, a non-orbiting scroll member, an economizer injection inlet, and a discharge outlet. The orbiting scroll member and the non-orbiting scroll member are disposed within the compressor housing. The orbiting scroll member and the non-orbiting scroll member are intermeshed thereby forming a compression chamber within the compressor housing. The non-orbiting scroll includes a plurality of compression inlet ports. An economizer injection inlet is formed through the compressor housing and in fluid communication with the compression chamber via the compression inlet ports. The economizer injection inlet is disposed between the non-orbiting scroll member and the compressor housing. The discharge outlet is in fluid communication with the compression chamber.

Abstract: A highly reliable horizontal rotary compressor is provided with a sealed housing, an electric motor, a compression mechanism, a frame which divides the inside of the sealed housing into an electric-motor chamber and a compression-mechanism chamber, and a plurality of bolts that fasten the compression mechanism to the frame. The compression mechanism includes a main bearing fasten to the end surface of a cylinder. A bearing contact-surface of the end surface of the cylinder is in contact with the main bearing, is located closer to the electric motor than a frame contact-surface which is in contact with the frame. The surface roughness of the frame contact-surface is greater than the surface roughness of the bearing contact-surface. The contact-surface of the frame is a single continuous flat surface located above the bolt located at the lowest position among the plurality of bolts.

Abstract: A technique for providing a water pumping system suitable for fighting wildfire, flood mediation, sewage transport, and the like is revealed. The system includes an internal combustion engine, a CVT with an input shaft and an output shaft, and a pump with an axial flow impeller. In one variation, multiple impeller stages are used and/or several systems are daisy-chained to provide for suitable delivery of water from its source. In another form, the system is carried by an all-terrain vehicle, side-by-side, or the like, to reach remote areas that need to move water to address a hazardous condition.

Abstract: A fan includes an impeller rotating on a central axis, an impeller housing, a motor located on one side in an axial direction of the impeller and driving the impeller to rotate, and a motor housing. The impeller housing is provided with an air inlet. The fan further includes a pre-pressing portion expanding radially inward from an edge of the air inlet. The pre-pressing portion includes a pressing portion located on another side in the axial direction of the impeller and pressing, from the another side in the axial direction, an end portion of the impeller on the another side in the axial direction, and at least two connection portions connected between an outer periphery of the pressing portion and the edge of the air inlet. The connection portions are disposed obliquely with respect to the axial direction.

Abstract: A pump is provided for immersion in a fluid reservoir, such as a pit or lagoon containing liquid manure, from a position at an edge of the reservoir. The pump may be adapted for connection to a farm vehicle, such as a tractor, positioned at the edge of the reservoir. The pump comprises an extensible body, fluid conduit and drive means in order that a length of the pump may be varied in order to accommodate a variety of reservoir fluid heights. In addition, the pump may be pivotable relative to at least a portion of a frame in order that the entrance angle may be adjusted. The pump may comprise a housing with an inlet and an outlet, the outlet in fluid communication with the fluid conduit. An impeller within the housing may direct fluid from the inlet to the outlet in the housing.

Abstract: A rotary compressor system includes a compressor housing that includes a compressor motor that draws in fluid from a suction side. The fluid is compressed within a compression chamber and discharged through a discharge side. The compression chamber is disposed between the suction side and the discharge side. An overload-protection switch is electrically coupled in series with the compressor motor and is adapted to cut power to the compressor motor responsive to an overload event. A solenoid valve is fluidly coupled between the compression chamber and a location upstream of the suction side and is electrically coupled in series with the overload-protection switch. An interruption of electrical current to the compressor motor also interrupts electrical current to the solenoid valve, which opens the solenoid valve to equalize pressure between the suction side and the discharge side.

Abstract: The pump includes a rotational shaft (1), an impeller (3) fixed to the rotational shaft (1), a casing (2) that houses the impeller (3), a double mechanical seal (20), a seal chamber (25) that houses the double mechanical seal (20), an oil reservoir (30) configured to store oil, an oil supply line (26) providing fluid communication between the oil reservoir (30) and the seal chamber (25), a first oil pump (31) configured to pressurize oil supplied from the oil reservoir (30) and deliver the oil to the seal chamber (25), a second oil pump (42) arranged in parallel with the first oil pump (31), an oil outlet line (27) coupled to the seal chamber (25), and a pressure retaining mechanism for retaining pressure of oil in the seal chamber (25).

Abstract: A compressor includes a housing, a shaft, and an impeller rotatable relative to the housing by the shaft. The impeller includes a hub, impeller blades, and external blades. The impeller blades extend from a front of the hub. The external blades protrude from a rear surface of the hub or an outer surface of a shroud of the impeller. The external blades are curved along the rear surface or the outer surface. A heat transfer circuit includes a compressor and a working fluid. The compressor includes an impeller having a hub, impeller blades, and external blades.

Abstract: The invention belongs to the technical field of fans, in particular to a high-efficiency oblique flow fan. The oblique flow fan comprises fan blades, an air guide cover, directional air guide blades and a housing, wherein the fan blades and the directional air guide blades are connected through a central bearing, the bearing fixed at the center of the conical fan blades passes through a reserved hole in the center of the directional air guide blades and is fixed, the air guide cover is directly stuck at the corresponding position on the housing through the action of a clamping point, and the directional air guide blades and the housing are fixed through screws. The oblique flow fan of the invention reduces sudden change and turbulence of air flow to the greatest extent, doubles the air pressure and energy efficiency of the fan, and effectively reduces noise.

Abstract: Turbomachines having one or more flow guiding features designed to increase the performance of the turbomachine. In some examples, flow guiding features are designed and configured to bias a circumferential pressure distribution at a diffuser inlet toward circumferential uniformity, otherwise account for such low-frequency spatial pressure variations, increase the controllability of spatial flow field variations, or modifying flow field variations, etc. In some examples, a diffuser having a row of vanes that include a plurality of first vanes and at least one second vane having a different characteristic than the first vanes are disclosed. In some examples, diffusers having an aperiodic section including one or more biased passages for biasing a flow field are disclosed. And in some examples, turbomachines having flowwise elongate recesses in one or both of a hub and shroud surface are disclosed.

Abstract: A ceiling fan includes a support rod that is capable of engaging with a ceiling, a motor that is provided at a lower portion of the support rod, blades (5) that are detachably attached to the motor, and lighting unit (7) that is provided at a lower portion of the motor. Lighting unit (7) includes upper lighting cover (16), lower lighting cover (17) that covers an area below upper lighting cover (16), board (19) which is disposed between lower lighting cover (17) and upper lighting cover (16), and on which a light-emitting component is installed, and heat-dissipating unit (18) that is provided between board (19) and upper lighting cover (16), and dissipates heat from board (19). Upper lighting cover (16) and lower lighting cover (17) are formed of a resin, and opening (31) for dissipating heat is provided at a center portion of upper lighting cover (16).

Abstract: A compressor shroud assembly is disclosed comprising a dynamically moveable impeller shroud, a static compressor casing, an air piston mounted between said impeller shroud and said compressor casing, and a clearance control system. The air piston effects axial movement of said impeller shroud responsive to a supply of actuating air. The clearance control system regulates the pressure of actuating air in said air piston and comprises a supply conduit having a supply modulating valve and a discharge conduit having a blowoff check valve. The blowoff check valve is set to open at a predetermined differential pressure between pressure of the air piston and pressure of the supply of actuating air.

Abstract: An axial blower includes a rotating blade assembly including a plurality of blades, a motor that rotates the rotating blade assembly to generate an airflow, and a bell mouth that is a frame surrounding the rotating blade assembly from a direction perpendicular to the rotation axis of the rotating blade assembly, wherein the bell mouth has an inlet curved surface on an upstream side of the airflow, the inlet curved surface becomes narrower toward a downstream side of the airflow in the axial direction of the rotation axis, and R1/D?0.05 is satisfied where D represents the outer diameter of the rotating blade assembly, and R1 represents the radius of curvature of the inlet curved surface.

Abstract: In a hydraulic shield support system, a plurality of pressure intensifiers are respectively provided for a plurality of hydraulic props. Each pressure intensifier is operated to increase a system pressure to an increased pressure for supplying fluid at the increased pressure to a pressure chamber of the associated hydraulic prop. The plurality of pressure sensors measure the pressures of the fluid supplied to the respective hydraulic props. A control unit sets a plurality of desired pressures for the plurality of hydraulic props, and stops operation of the respective pressure intensifiers when the set desired pressure has been reached.