Abstract: Provided is an intake manifold for an internal combustion engine, the intake manifold including an upstream portion, a first downstream portion, and a second downstream portion. The upstream portion includes a first upstream passage and a second upstream passage. The first downstream portion includes a first downstream passage configured to communicate the first upstream passage with an intake port of a first cylinder head. The second downstream portion includes a second downstream passage configured to communicate the second upstream passage with an intake port of a second cylinder head. The upstream portion, the first downstream portion, and the second downstream portion are provided in a separate manner. In the intake manifold, a flange of the first downstream portion is connected to a flange of the upstream portion, and a flange of the second downstream portion is connected to the flange of the upstream portion.

Abstract: A fuel filter insert for a fuel filter including: a pre-filter element having a upper and lower end plate, the end plates arranged on opposing ends of filter medium of the pre-filter element; a main filter element having upper and lower end plates, the end plates arranged on opposing ends of filter medium of the main filter element; wherein the pre-filter element and the main filter element as arranged one above the other in a direction of a longitudinal axis of the fuel filter insert; wherein at least one of the filter elements is through-flowable from the outside to the inside by fuel in a radial direction relative to the longitudinal axis; and a flow channel for the fuel pre-filtered by the pre-filter element; wherein the flow channel is arranged to extend in the axial direction between the pre-filter element and the main filter element.

Abstract: A throttle device for controlling a fuel quantity to be supplied to a fuel injection nozzle includes a control chamber and a supply device for supplying fuel to the control chamber. The supply device includes an inlet throttle having a length selected such that a fuel flowing through the inlet throttle, when in operation, flows through the inlet throttle in a turbulent flow. An injection device including the throttle device is also provided.

Abstract: A fuel injection valve includes a valve body, a coil, an inner fixed iron core that is arranged on an inner peripheral side of the coil, and an outer fixed iron core that is arranged on an outer peripheral side of the coil. The fuel injection valve also includes a movable element that is configured to be attracted to the inner fixed iron core and the outer fixed iron core, wherein the movable element is configured to be separable from the valve body and is configured to move the valve body.

Abstract: A manually actuated feed pump is provided with a primer bulb to be manually actuated by an operator. The primer bulb has a pump chamber. A travel-controlled valve connects the pump chamber to a fuel line. The travel-controlled valve has a valve member that is moved by an actuation travel of the primer bulb into an open position that opens the travel-controlled valve. A first spring is operatively connected to the valve member and to the primer bulb. The primer bulb acts through the first spring on the valve member.

Abstract: The present invention is a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder, a cylinder head carrying fuel injection, a piston sliding in the cylinder, a combustion chamber limited on one side by upper face of the piston comprising a projection extending in the direction of the cylinder head and in the center of a concave bowl (46) with at least two mixing zones. The fuel injection projects fuel in at least two fuel jet sheets with different sheet angles, with a lower sheet having a jet axis C1 for one zone and an upper sheet having a jet axis for the other zone. The injection feeds fuel into the combustion chamber with a different flow rate for each sheet for dedicated targeting in the mixing zones of the combustion chamber.

Abstract: A reciprocating piston internal combustion engine includes: a sensor system on a gas exchange valve which has a valve head situated at a first end of a valve stem; a lever element which engages at a second end of the valve stem and which is designed to actuate the gas exchange valve by displacing the valve head; a detection element which, upon actuation of the gas exchange valve, is displaced along a displacement path; and a sensor device configured to ascertain a position of the detection element. The sensor device is situated in such a way that the detection element, during a displacement along a portion of the displacement path, moves predominantly in a movement toward the sensor device or away from the same, thereby providing a measurement of valve timing of the gas exchange valve.

Abstract: An apparatus includes a stop/start module in operative communication with an engine. The stop/start module structured to determine whether a stopping event has occurred, determine whether an inhibiting condition is activated, turn off the engine for at least a portion of time in response to determining that a stopping event has occurred, and determine an actual stop ratio for the engine based on a number of times the engine is turned off in response to determining the occurrences of stopping events. Turning off the engine is inhibited in response to determining that an inhibiting condition is activated. The inhibiting condition is activated based on the actual stop ratio for the engine being greater than a target stop ratio at a beginning of a driving event. The target stop ratio is based on an operating parameter.

Abstract: The rotation speed and the crank position of an engine in an engine stopping process are detected; then, in the case where when the detected crank position is at an intermediate point between the top dead center of any one of the cylinders and the top dead center of the cylinder following said one of the cylinders, it is determined that the engine rotation speed is within a predetermined range, drive of the starter is prohibited for a predetermined time period.

Abstract: A system according to the present disclosure includes a first crank angle module, a second crank angle module, and a spark control module. The first crank angle module determines a first crank angle of an engine at which a predetermined percentage of fuel in a first cylinder of the engine is combusted based on pressure in the first cylinder. The second crank angle module determines a relationship between the first crank angle and a second crank angle of the engine at which the predetermined percentage of fuel in a second cylinder of the engine is combusted based on pressure in the first cylinder and pressure in the second cylinder. The spark control module adjusts spark timing of the first cylinder based on the first crank angle, and adjusts spark timing of the second cylinder based on the relationship between the first and second crank angles.

Abstract: The invention is directed to a solar tracking apparatus containing a polar axis aligned shaft which rotates continuously or intermittently at a rate simulating the apparent approximate fifteen degree per hour movement of the sun across the sky. A Fresnel lens, photovoltaic panel, parabolic dish or other solar collection/concentration device is adjustably mounted to about twenty three degrees either side of perpendicular to the axis of the shaft and directly at the Sun, collecting, focusing or concentrating the solar radiation on a receiving device, which stores the solar energy in the form of heat, re-directs the light or converts the energy into electricity.

Abstract: An ocean wave power plant provided for by respective interconnected functional units comprising a support structure (1a, 1b) is disclosed. The support structure (1a, 1b) is terminated in a lower end with a fastening bracket (9c) which can be anchored in a single point to a mass (9e) when deployed in the sea. A submergible uplift floating body (2) is providing buoyancy for the ocean wave power plant when deployed in the sea. The a uplift floating body (2) is attached to the support structure (1a, 1b), an electric power generating subsystem (A) supported by a platform (8) is terminating the support structure (1a, 1b) in an upper end of the support structure. A transmission member (4, 4a, 18) is attached in one end to a floating body (3) and in another end to the power generating subsystem (A) transferring wave motion from the floating body (3) to the power generating subsystem (A).

Abstract: A wind turbine blade includes a trailing edge including a radially inboard portion and a radially outboard portion opposite the radially inboard portion. The trailing edge further includes at least one serrated portion extending at least partially between the radially inboard portion and the radially outboard portion. The serrated portion includes at least one substantially acoustically absorbent material.

Abstract: The present disclosure is directed to thermoplastic airflow modifying elements for a rotor blade for a wind turbine and methods of assembling same. The rotor blade may be constructed from at least one of a thermoset material or a thermoplastic material. Further, the rotor blade includes a blade shell defining an outer surface. Moreover, the rotor blade includes one or more layers of thermoplastic material infused to the outer surface of the blade shell so as to define one or more attachment locations. In addition, the rotor blade includes at least one airflow modifying element constructed, at least in part, from a thermoplastic material. Thus, the airflow modifying element(s) is welded to one of the attachment locations on the outer surface of the blade shell.

Abstract: An erosion resistant aerodynamic fairing for a rotor blade. A fairing body is formed from at least one reinforcing fiber layer set in a cured resin. An erosion resistant pre-form is fixed to an outer surface of the fairing body. The erosion resistant pre-form comprises a thermoplastic film outer layer fused to a fiber substrate. The fiber substrate of the erosion resistant pre-form is impregnated with the cured resin of the fairing body which fixes at the preform to the fairing body.

Abstract: A virtual aerodynamic component for a wind turbine including at least one rotor blade connected to a hub. The at least one rotor blade defines an inner portion and a profiled outer portion. The virtual aerodynamic component includes one or more air-blowing units configured to provide a flow of air substantially opposed to an incoming wind. The flow of air defines the virtual aerodynamic component in front of the inner portion of the at least one rotor blade and provides for redirection of the incoming wind toward the profiled outer portion of the at least one rotor blade in an operational state and allows the incoming wind to flow toward the inner portion of the at least one rotor blade in a non-operational state. Further described is a wind turbine including the above-described virtual aerodynamic component and method for aerodynamic performance enhancement of an existing wind turbine.

Abstract: A method of adjusting a pitch angle of a rotor blade of a rotor of a wind turbine is provided. The method comprises varying the pitch angle of the rotor blade during wind operation of the wind turbine from a starting angle to reach a limit angle (?1, ?2) at which the rotor blade and/or an operational value (P) of the wind turbine reaches a predefined threshold limit (P1/2; ?1, ?2), deriving a safe angle (?3, ?4) dependent on the limit angle (?1, ?2), operating the rotor blade at the safe angle (?3, ?4) or an angle from the safe angle (?3, ?4) away from the limit angle (?1, ?2). A pitch angle adjustment system is also provided for the same purpose.

Abstract: The present disclosure is directed to a method for controlling a pitch angle of a rotor blade of a wind turbine. The method includes adjusting, with an actuator, the pitch angle of the rotor blade during a start-up sequence of the wind turbine. The actuator adjusts the pitch angle of the rotor blade by rotating the rotor blade about a pitch axis relative to a hub. The method also includes determining, with a controller, a minimum pitch angle threshold of the rotor blade based on a tip speed ratio of the rotor blade. The method further includes comparing, with the controller, a current pitch angle of the rotor blade to the minimum pitch angle threshold. When the pitch angle meets the minimum pitch angle threshold, the method includes preventing, with the actuator, the pitch angle of the rotor blade from exceeding the minimum pitch angle threshold.

Abstract: The invention provides a wind turbine having a system for positioning the rotor in an azimuthal reference position Azref and for maintaining it therein for a predetermined period of time, the wind turbine being arranged in test mode. Said rotor positioning system comprises a first controller (31) configured to generate a generator speed reference ?ref from the difference between the rotor azimuthal reference position Azref and the rotor azimuthal measured position Azmeas and a second controller (35) configured to generate a generator torque reference Tref from the difference between said generator speed reference ?ref and the generator speed measured ?meas.

Abstract: A control method and a control apparatus of a wind power generator set are provided, in which a wind speed at a location of the wind power generator set is acquired, turbulence intensity is calculated according to the wind speed, and a wind speed distribution range corresponding to the turbulence intensity is determined; a thrust variation amplitude of the thrust in the wind speed distribution range is determined based on a relationship among the thrust suffered by a wind wheel of the wind power generator set, a thrust coefficient and the wind speed; and a maximum rotating speed and a maximum torque of the wind wheel in the wind speed distribution range are adjusted according to the thrust variation amplitude. The maximum rotating speed and the maximum torque makes a fatigue load of the wind power generator set in the wind speed distribution range meet a preset standard.

Abstract: An equivalent variable pitch differential control method and apparatus. The method includes: acquire a first control parameter and a second control parameter respectively by means of a static energy deviation PI control method; acquire an equivalent differential third control parameter using a dynamic energy deviation; and by taking a wind wheel measurement rotating speed and a wind wheel reference rotating speed as inputs, a proportion integration differentiation controller controls a wind generating set according to the first control parameter, the second control parameter, and the third control parameter, thereby making a wind wheel rotating speed follow the wind wheel reference rotating speed. A wind generating set is controlled in real time by combining first and second control parameters and an equivalent differential third control parameter to serve as parameter values of the proportion integration differentiation controller.

Abstract: A method is proposed for operating at least one wind turbine of a wind farm including determining wind turbine individual offset information based on reactive power provided by the respective wind turbine and reactive power provided by at least one further wind turbine of the wind farm, determining wind turbine individual control information based on the wind turbine individual offset information and wind farm specific control information, operating the at least one wind turbine according to the wind turbine individual control information. Further, a controller and a device as well as a computer program product and a computer readable medium are also provided.

Abstract: A hydrostatic axial piston machine includes a pot-like housing, a connection plate that closes the pot-like housing, a rotatably mounted cylinder drum, and pistons arranged in cylinder chambers of the cylinder drum. The cylinder chambers are each alternately connected via a cylinder chamber opening to a low-pressure control opening and a high-pressure control opening of a resting control part. The control part has two switching regions located between the low-pressure and high pressure control openings. A piston reverses its movement direction in a dead center within the two switching regions. In the switching region, the cylinder chambers are connected via a connecting line to a fluid volume arranged in the housing. The fluid volume extends between the connection plate and the housing such that it is sealed to an interior by the connection plate and the housing.

Abstract: A high pressure pump including a linear actuator having a servo motor to axially rotate a hollow rotor shaft in alternating directions, the servo motor having a stator positioned co-axially around the hollow rotor shaft with an interior of the rotor shaft being co-axially coupled to a drive member to convert axial rotation into reciprocal displacement, the drive member being constrained against linear movement and supporting a shaft. At least one piston is coupled to the shaft and the piston is arranged within a cylinder to define a pumping chamber, whereby alternating rotation of the rotor shaft causes reciprocal linear displacement of the piston to pressurize fluid in the pumping chamber. A drive mechanism includes a controller coupled to a servomotor and an encoder to measure movement of the hollow rotor or output shaft and send a feedback signal proportional to the movement to the controller.

Abstract: A plunger electric fuel pump includes a cylinder; a plunger; a pump body; a movable element to which the plunger is connected; a fixed core provided so as to face the movable element; a rotational core including a permanent magnet; an electric motor configured to rotate the rotational core; and a spring configured to urge the movable element in a direction away from the pump body. The rotational core and the fixed core are provided with a switching portion configured to switch between a first state and a second state when a rotational phase of the rotational core is changed, the first state being a state where the magnetic force of the permanent magnet is not applied to the movable element, the second state being a state where the magnetic force of the permanent magnet is applied to the movable element.

Abstract: A fluid flow meter comprising a fluid pump to displace fluid with pumping strokes of one or more pumping stroke types wherein each of the one or more stroke types displaces a known volume of fluid, a sensor functionally associated with a fluid reservoir and adapted to generate a signal indicative of a fluid pumping condition within the fluid reservoir, which fluid reservoir is integral or functionally associated with the pump, and circuitry to trigger one or a sequence of strokes of the pump in response to a signal from the sensor.

Abstract: An air operated diaphragm pump is provided a housing having an orifice formed therein; a gas passageway configured to provide gas through the air operated diaphragm pump in order to pump syrup through the air operated diaphragm pump; a syrup passageway configured to provide the syrup through the air operated diaphragm pump when the gas is passed though the gas passageway, part of the syrup passageway configured in fluidic communication with the orifice of the housing with an inside pressure greater than an external pressure of the outside atmosphere when the syrup is provided through the air operate diaphragm pump; and an indicator arrangement configured or arranged in the orifice of the housing to communicate with the syrup passageway, and to respond or activate when a vacuum force exceeds a predetermined level and provide a visual indication when the syrup is no longer provided through the air operated diaphragm pump.

Abstract: A portable air compressor including a housing, an air compressing assembly within the housing, the air compressing assembly including a switch, a motor, a gear assembly, and a piston, and a storage unit integrated as part of the housing and retaining a power cord and an adapter.

Abstract: Controlling the operation of a jockey pump in a fire pump system including a jockey pump controller which includes an electronic circuit board configured to receive a signal indicating a pressure value, and compares the pressure value to a threshold for initiating operation of the jockey pump. The jockey pump controller may further include memory configured to store event statistics indicating information regarding past operation of the jockey pump.

Abstract: A seal assembly includes a packing nut and a pressure ring configured to be coupled to the packing nut. An inner surface of the pressure ring defines a first circumferential groove that is configured to receive a first seal. The first seal is configured to be inserted into the first circumferential groove before the packing nut is coupled to the pressure ring such that the first seal is inserted into the first circumferential groove without being substantially flexed.

Abstract: A method for operating a device for providing a liquid additive includes feeding the liquid additive along a feeding path. The feeding path has at least one first portion in which a peristaltic pump is disposed. The pump, in particular, has a reversible feeding direction and can be damaged by deposits discharged from the liquid additive. The feeding path also has at least one second portion in which a component susceptible to freezing is disposed. At first liquid additive is fed along the feeding path of the device. Subsequently, the feeding of the liquid additive is stopped. The feeding path is then partially emptied in such a way that liquid additive remains in the at least one first portion of the feeding path while the at least one second portion is emptied. A device for providing a liquid additive is also provided.

Abstract: The pump unit (10) has a particularly simple design, which includes just two housing parts (14, 15) and also four valve closure members (37) and pump pistons (25, 29). The valve closure members (37) are preferably identical to one another and are trapped in a pocket between both housing parts (14, 15). The housing parts (14, 15) are preferably permanently interconnected by an ultrasonic weld seam. The valve closure members are formed by disc-like or plate-like plastic parts, which are resilient per se and which may optionally have a central pin (42) as an assembly and orientation aid. As desired, the valve closure members bear against their respective valve seat (43) with or without bias and form valves which open and close particularly reliably, are responsive to the slowest flow velocities and can be easily sterilized.

Abstract: According to one aspect, a pump assembly includes a fluid cylinder, the fluid cylinder including a fluid passage, the fluid passage defining a tapered internal shoulder of the fluid cylinder, the tapered internal shoulder defining a first angle. A valve controls flow of fluid through the fluid passage. The valve includes a valve seat, which is disposed in the fluid passage and includes a tapered external shoulder, the tapered external shoulder defining a second angle. In one embodiment, the first tapered external shoulder engages the first tapered internal shoulder to distribute and transfer loading.

Abstract: A valve assembly includes a valve body having a first port and a second port, the first port forms a fluid pathway from a first surface of the valve body to a second surface of the valve body, and the second port forms a fluid pathway from the second surface of the valve body to a third surface of the valve body. The valve assembly also includes a first plate having a first blocking member, the first blocking member configured to block the first port at the first surface of the valve body when the first plate is in a first closed position. The valve assembly also includes a second plate having a second blocking member, the second blocking member configured to block the second port at the second surface of the valve body when the second plate is in a second closed position.

Abstract: A uniaxial eccentric screw pump includes: a casing; a stator having one end portion thereof connected to the casing and having an inner peripheral surface which is formed into a female threaded shaped; a rotor configured to be insertable into the stator and formed of a shaft body having a male threaded shape; and an end stud connected to the other end portion of the stator. The stator is configured to be expandable and shrinkable in a radial direction.

Abstract: A magnetically engaged pump includes a pump housing with a rotatable magnetic drive assembly, a cylindrical canister and a rotatable driven magnet assembly. This magnetic coupling is associated with a pump rotor and a laterally positioned gear wheel to define a gear pump. This magnetic coupling is alternatively associated with a pump rotor with an impeller to define a centrifugal pump. Either pump includes a stationary shaft to mount the driven magnet assembly and pump rotor. A rotatable carrier with bushings and thrust bushings coaxially supports the rotatable driven magnet assembly and pump rotor.

Abstract: A scroll compressor has a sealed container inside which a working fluid is sealed; a frame fixed inside the sealed container; a fixed scroll provided with a fixed-side spiral body formed in a spiral shape on a fixed-side base plate fixed inside the sealed container; and a revolving scroll in which a revolving-side spiral body meshing with the fixed-side spiral body is provided on a revolving-side base plate. The frame includes a first welded point at which the frame is fixed by welding to the sealed container, and a revolving-scroll-receiving surface supports a bottom surface of the revolving-side base plate opposite to a surface thereof on which the revolving-side spiral body is provided. A frame outer peripheral groove provided in an outer periphery of the frame faces an inner periphery of the sealed container between the revolving-scroll-receiving surface and the first welded point.

Abstract: The present disclosure provides a compressor system operable for compressing a working fluid such as air. A conditioner is positioned upstream of the compressor to reduce the humidity and may in certain forms control a temperature of the working fluid entering the compressor. An aftercooler and an oil cooler is positioned downstream of the compressor. A first heat exchange system may direct water from a source through the conditioner to the aftercooler and oil cooler. An oil heat exchange circuit directs oil from the compressor to the oil cooler and then to a regenerator prior to reentry into the compressor. A control system is operable for controlling portions of compressor system to provide inlet air to the compressor at a desired temperature and humidity.

Abstract: Methods, systems, and apparatuses are disclosed to isolate operation vibration of a compressor to reduce operational sound. A compressor may include an external shell, and one or more isolators that separate a compression mechanism of a compressor from the external shell. The isolator can help isolate the vibration of the compression mechanism from the external shell. The isolator can also support a weight of the compression mechanism. The external shell can also include one or more internal seals. The internal seals can help separate a low-pressure side (e.g., a suction side) and a high-pressure side (e.g., a discharge side) of the compression mechanism. The compressor may also include a pressure balancing mechanism configured to help reduce a pressure difference between, for example, two ends of the compression mechanism, so as to reduce/eliminate the compression mechanism from physical shift in position due to the pressure difference.

Abstract: A pumping system for at least one aquatic application controlled by a user. The pumping system includes a pump and a motor disposed in a first housing and coupled to the pump. A user interface is associated with a second housing, the second housing defined by a base portion shaped to interact with the first housing and a user interface portion that carries a plurality of control buttons, wherein the second housing is selectively positionable among a plurality of positions relative to the first housing.

Abstract: Disclosed is a system for controlling a pump, such as a submersible pump intended for pumping water, including a pump and a separate electronic control unit connected to the pump by an electrical cable. The control unit is adapted to be detachably connected to the pump. The control unit is adapted to allow the pump's power supply to pass through the control unit. An electronic controller is arranged in the pump for controlling at least one of the pump's functions and/or monitoring at least one of the pump's operating conditions. The pump and the control unit are adapted to communicate with each other and transmitting signals, including necessary control and/or monitoring information/data, between each other.

Abstract: A pumping system for moving water of a swimming pool includes a water pump, a variable speed motor, and an arrangement for controlling the variable speed motor. The pumping system further includes an auxiliary device operably connected to the arrangement for controlling, which is capable of receiving a parameter from the auxiliary device. The arrangement for controlling is capable of independently controlling the variable speed motor without receipt of a parameter from the auxiliary device. In addition or alternatively, the arrangement for controlling is operable to selectively alter operation of the motor based upon the parameter.

Abstract: A vehicle seat comprises a seat bottom having a bottom cushion and a seat back coupled to the seat bottom with the seat back having a back cushion. At least one of the bottom cushion and the back cushion defines a passage. The vehicle seat further comprises a blower assembly coupled to one of the seat bottom and the seat back. The blower assembly comprises a housing and a stator, which is coupled to the housing and comprises a plurality of driving coils. The blower assembly further comprises a rotor rotatably coupled to the housing about a rotational axis, with the rotor comprising a plurality of permanent magnets arranged to generate a flux concentrated on the driving coils. The blower assembly further comprises an impeller coupled to the rotor to rotate about the rotational axis to generate a flow of air through the passage.

Abstract: A TiAl alloy comprising the elements C, Si, B, Al and Ti, wherein a C fraction is ?0.5 wt %, an Si fraction is 0.05-2.5 wt %, a B fraction is ?0.4 wt % and an Al fraction is 25-43 wt %, in each case in relation to the total weight of the alloy.

Abstract: An impeller fan assembly that includes a housing, a stator, a rotor having a hub and an annular array of non-stationary blades extending from the hub, at least two spaced apart bearings mounted to the stator, and a pump in fluid communication with the bearings to provide fluid to the bearings. A screw pump is provided within the hollow portion of the shaft. Inlet of the screw pump is fluidly coupled to the sump and outlet is in fluid communication with the bearings. Rotation of the screw pump pumps fluid from the sump to the bearings. A de-swirler is provided within the sump to reduce rotational movement of the fluid within the sump. The de-swirler has a hub with fixed curved vanes extending from the centerline of the hub. The curved vanes have curvature in a direction opposite from a rotational direction of the screw pump.

Abstract: A turbocharger rotating assembly (125) includes a shaft (20) rotatably supported in a bearing housing (123) via bearings (26, 128), a compressor impeller (18) mounted on the shaft (20), and an oil flinger (122) disposed on the shaft (20) between the bearings (26, 128) and the compressor impeller (18). The turbocharger (100) further includes an insert (134) disposed in the shaft-receiving axial bore (120) so as to surround the oil flinger (122), and a purge seal (160) operatively positioned in an interface (131) between the insert (134) and the oil flinger (122), whereby the purge seal (160) is configured to minimize oil passage from the bearing housing (123) into the interface (131). An annular cavity (150) encircles the radially outward-facing surface (138) of the insert (134), the cavity (150) forming a portion of a fluid path configured to deliver pressurized fluid to the interface (131).

Abstract: A suction diffuser or arrangement is provided featuring a main suction diffuser body and a flow conditioning arrangement. The main suction diffuser body is configured with an inlet to receive an incoming fluid flow, an interior cavity to receive the incoming fluid from the inlet, and an outlet to receive the incoming fluid from the interior cavity and provide an outgoing fluid. The flow conditioning arrangement is configured in relation to the inlet and also comprises a flow conditioning portion having at least one inwardly contoured surface, configured to extend into the interior cavity, diffuse the incoming fluid passing from the inlet into the interior cavity, and provide a flow conditioning that produces a uniform flow of the outgoing fluid by directing the incoming fluid towards the outlet, based at least partly on a contoured design corresponding to the at least one inwardly contoured surface.

Abstract: A centrifugal compressor is disclosed. The centrifugal compressor comprises an inlet and an impeller comprising a hub and blades. The inlet is for conveying flow to the impeller comprising guide means and is arranged to guide the flow through the inlet to induce swirl in the flow adjacent tips of the blades, the direction of swirl being the direction of rotation of the blades, without substantially disturbing flow adjacent the hub.

Abstract: A supersonic compressor provided may include an axial inlet and a centrifugal impeller fluidly coupled to the axial inlet. The centrifugal impeller may have a periphery and may be configured to impart energy to process fluid received via the axial inlet and discharge the process fluid from the periphery in at least a partially radial direction. The supersonic compressor may further include a static diffuser circumferentially disposed about the periphery of the centrifugal impeller and configured to receive the process fluid from the centrifugal impeller and convert the energy imparted. The static diffuser may include a plurality of diffuser vanes defining diffuser passageways therebetween. A supersonic ramp may be formed at an end of the at least one diffuser vane proximate the periphery of the centrifugal impeller. The supersonic ramp may be configured to generate a shock wave from the process fluid.

Abstract: A ventilator includes an opening formed on a bottom surface, a rectangular frame provided with a flange, a volute provided with a fan motor inside, and a connector connected to an air outlet of the volute. Four side surfaces of the frame excluding the top surface and the bottom surface tilt towards the outer lower side in a direction from the top surface to the bottom surface, and the opening area of the bottom surface is larger than that of the top surface. The ventilator saves packaging and installation costs, and further facilitates installation between the roof and the ceiling.