Abstract: The present invention provides an optimization control method for an aero-engine transient state based on reinforcement learning, and belongs to the technical field of aero-engine transient states. The method comprises: adjusting an existing twin-spool turbo-fan engine model as a model for invoking a reinforcement learning algorithm; to simultaneously satisfy high level state space and continuous action output of a real-time model, designing an Actor-Critic network model; designing a deep deterministic policy gradient (DDPG) algorithm based on an Actor-Critic frame, to simultaneously solve the problems of high-dimensional state space and continuous action output; training the model after combining the Actor-Critic frame with the DDPG algorithm; and obtaining the control law of engine acceleration transition from the above training process, and using the method to control an engine acceleration process.

Abstract: A method for controlling an internal combustion engine having an exhaust gas turbocharger and an exhaust gas aftertreatment device, includes determining a catalytic converter temperature, comparing the determined catalytic converter temperature with an upper temperature threshold, and, if the comparison determines that the threshold has been exceeded, reducing a proportion of the exhaust gases of the internal combustion engine which are guided through a turbine bypass of the exhaust gas turbocharger.

Abstract: A drive control system includes an engine, an electric turbocharger, and a controller. The engine includes a cylinder and a piston provided in a slidable manner inside the cylinder and rotates a crankshaft in accordance with sliding of the piston. The electric turbocharger supplies compressed air into the cylinder. The controller controls the engine and the electric turbocharger. The controller includes at least one processor and at least one memory coupled to the processor. The processor transmits a stoppage signal for stopping the engine to the engine, and stops the piston at a position where a crank angle is within a predetermined range from 60° before a top dead center to 30° before the top dead center by causing the electric turbocharger to supply the compressed air into the cylinder in a period from when the stoppage signal is transmitted to when stopping the engine is completed.

Abstract: A non-road mobile machinery (NRMM) is provided and includes a fuel storage device, a fuel supply device, a vapor adsorption device, and an engine body. The vapor adsorption device is provided with an air vent communicated to the atmosphere. A vapor discharge hole of the fuel storage device is communicated to an adsorption vent of the vapor adsorption device. The NRMM also includes a valve mechanism connected between a desorption vent of the vapor adsorption device and an intake channel of the engine body. The valve mechanism is conducted with the working of the engine body and blocked with the stop of the engine body. The NRMN improves the evaporation emission performance of the NRMM when compared to the prior art and solves the problem that the evaporation emissions of the NRMM in the prior art are prone to exceed the standard.

Abstract: A vehicle drive has an internal combustion engine, an air conduit system, an exhaust system and a diagnostic unit for identifying a leak in the air conduit system of the internal combustion engine. The diagnostic unit is designed to carry out a method for diagnosing a leak in an internal combustion engine, including by determining mass flows in the air conduit system, and identifying a leakage mass flow.

Abstract: Systems and methods are provided for improving the accuracy of fuel metering for a motor-driven fuel pump, without the need for a matched-set controller. A characterization resistor value specific to the fuel pump or motor is used to calculate a fuel pump motor speed to regulate fuel delivery to an engine.

Abstract: A multi-fuel microgrid class generator system includes a heat regenerative steam engine that provides a versatile power source having a clean burn using liquid fuel or biomass for generating electricity. The generator system is also capable of using wind energy and/or solar energy that is converted to heat and stored in a thermal storage unit using a heat exchange medium, such as carbon/graphite. The heat regenerative steam engine uses these various power sources to generate up to 1 megawatt of clean and cost-effective electricity.

Abstract: A centerbody assembly includes a center tube, a forward bulkhead, an aft bulkhead, at least one baffle, and an outer skin. The center tube extends circumferentially about an axial centerline. The center tube extends between and to a first axial tube end and a second axial tube end. The forward bulkhead is mounted to the center tube at the first axial tube end. The aft bulkhead is mounted to the center tube at the second axial tube end. The at least one baffle extends axially from the forward bulkhead to the aft bulkhead. At least the forward bulkhead, the aft bulkhead, or the at least one baffle include one or more thermal beads. The outer skin circumscribes the center tube, the forward bulkhead, the aft bulkhead, and the at least one baffle to form an acoustic cavity radially inside the outer skin.

Abstract: A geared turbofan engine includes a plurality of turbine stages, wherein for each stage (i) of the turbine, an inner radius Ri has a maximum deviation between +1.5% and ?3% as compared to the average inner radius of the inner blade platforms of the plurality of stages. The engine further includes a fan, the fan coupled to the turbine stages via a gear.

Abstract: A turbocharged compressor system using an Organic Rankine Cycle system to recover waste heat from a compression process. The Organic Rankine Cycle system circulates an organic fluid through an evaporator, where the organic fluid vaporizes and is expanded in a turbine section of a turbocharger to drive a compressor section of the turbocharger. The organic fluid vapor is condensed in a condenser and is pumped to the evaporator once again for recirculation. The compressor section of the turbocharger pre-compresses a working fluid before entering an airend in a compression system. As the working fluid exits the airend, it may be delivered to the evaporator, where the waste heat from the working fluid evaporates the organic fluid flowing in the Organic Rankine Cycle system. The working fluid may also be circulated between intercoolers in multi-stage compressor systems.

Abstract: A swirl preburner that includes a first core defining a first swirl chamber having a first swirl chamber first end and a first swirl chamber second end, the first swirl chamber comprising a first diameter at the first swirl chamber first end and a second smaller diameter at the first swirl chamber second end that is smaller than the first diameter; and a second core defining a second swirl chamber having a second swirl chamber first end and a second swirl chamber second end, the second swirl chamber comprising a third diameter at the second swirl chamber first end and a fourth smaller diameter at the second swirl chamber second end that is smaller than the third diameter, the first diameter being smaller than the third diameter and larger than the fourth smaller diameter.

Abstract: A fuel injection device includes a fuel injection valve at a position corresponding to a portion between intake ports in an internal combustion engine. The fuel injection valve includes a body and a needle inside the body. The fuel injection valve is disposed closer to a piston of the internal combustion engine than the intake ports are to the piston. A single fuel injection passage for conducting gaseous fuel is present between a valve seat of the fuel injection valve and a combustion chamber of the internal combustion engine. The flow cross section of the gaseous fuel in the fuel injection passage is larger on a side closer to the piston of the internal combustion engine than on a side closer to an ignition plug of the internal combustion engine over a specified length in an extending direction of the fuel injection passage.

Abstract: The present invention relates to an injector for injecting gas, in particular hydrogen, preferably for directly injecting hydrogen, comprising an injector housing for holding injector components, a valve needle movably arranged along its longitudinal axis in the injector housing and configured to selectively close or release an injection opening for the flow of hydrogen therethrough, and a valve, preferably a solenoid valve, which is adapted to transfer the valve needle into a closing or releasing state by a movement along its longitudinal axis. The injector is characterized in that the valve needle is a hollow needle adapted to pass a gas, in particular hydrogen, flowing through the injection port through the interior of the hollow needle.

Abstract: A fuel pump hanger assembly configured to fit two fuel pumps into the small opening of a fuel tank, even if the diameter of both fuel pumps combined is larger than the opening of the fuel tank. The fuel pumps may be inserted into the fuel tank one at a time, then assembled together through the small opening of the fuel tank. The parts self-locate inside the fuel tank and the assembly held together with bolts. This self-locating feature facilitates the assembly of all parts inside the small opening of the fuel tank. The hanger holds two common fuel pumps and comes with fittings for interfacing to the car's fuel and vapor lines.

Abstract: A battery pack is configured to be coupled to outdoor power equipment and includes a battery positioned in a housing, the housing comprising an interface surface, a plurality of high current pins electrically connected to the battery and accessible through the interface surface, a plurality of low current pins electrically connected to the battery and accessible through the interface surface, and a battery controller electrically coupled to the battery, the plurality of low current pins, and the plurality of high current pins.

Abstract: A hydromechanical energy storage and energy conversion device includes a water reservoir, a float which is arranged in the water reservoir, a generator, an energy transmission apparatus, and a fixing device. The float can be lifted with a rising water level in the water resevoir from a lower position into an upper position. The first floar can be fixed in the upper position. The genrator converts a kinetic energy into an electrical energy. The energy transmission apparatus connects the float to the generator and transmits the kinetic energy between the float and the generator. The fixing devoce secures the float in the upper position.

Abstract: A modular hydrokinetic turbine system for installation in a water stream. The system is assembled from a number of blade modules and a number of support modules, connected in the direction of the water stream. Each blade module has turbine blades, a rotor shaft portion, and two-piece rotor shaft coupling. The support modules rest on the stream bed and support the blade modules. The rotor shaft couplings allow the blade modules to be connected such that the rotor shaft portions provide a rotor shaft, but also allow the blade modules to be separable from the support modules. A generator located at one end of the system is driven by the rotor shaft.

Abstract: A wind power generation device control system includes: a blade wind detecting device for detecting at least one of a wind direction or a wind speed on at least one blade of a wind power generation device; and a blade control device for controlling at least one of (i) a pitch angle of the at least one blade or (ii) a yaw angle of the wind power generation device, based on at least one of the wind direction or the wind speed detected by the blade wind detecting device.

Abstract: A method for starting a wind turbine with hinged wind turbine blades, the wind turbine further comprising an adjustable biasing mechanism arranged to apply an adjustable biasing force to each wind turbine blade which biases the wind turbine blade towards a position defining a minimum pivot angle. The biasing mechanism is adjusted to apply a predefined biasing force to each wind turbine blade, and the pivot angle of each wind turbine blade is monitored. The wind turbine is started in the case that the pivot angle of at least one wind turbine blade exceeds a predefined pivot angle threshold.

Abstract: A method of transitioning a wind turbine from a sleep state is provided in which a wind speed at the wind turbine is measured, and the measured wind speed is compared to a wake-up threshold. If the wind speed exceeds the wake-up threshold, the wind turbine is transitioned to an active state. Before comparing, either the measured wind speed or the wake-up threshold is adjusted based on an outcome of at least one previous transition from the sleep state of the wind turbine.

Abstract: A method is presented for determining a setpoint signal of a wind energy conversion system. The method includes: providing a first input signal, comprising system frequency values of an electric power system, and a second input signal comprising an angular speed value of a wind energy conversion system; determining, from the first input signal, an intermediate signal comprising system frequency deviation values, the system frequency deviation values indicating deviations between the system frequency values and a target frequency value; determining, from the intermediate signal and the first input signal, a power correction signal comprising a first power value; determining, from the second input signal, a first reference signal comprising a second power value corresponding to a point of maximum power extraction of the wind energy conversion system; and determining a setpoint signal for setting an output power value of the wind energy conversion system.

Abstract: A plenum resident wind turbine sustainable energy generating system is disclosed. An example embodiment includes: a wind turbine assembly installed in a plenum of a heating, ventilating, and air conditioning (HVAC) unit, the wind turbine assembly including a plurality of blades and a transverse shaft; and a generator coupled to the shaft of the wind turbine assembly.

Abstract: A tool (600) for aligning tubular structures (200, 300) of a wind turbine comprises: a plurality of hanger members (601) configured to be pivotably attached to an end region of a first tubular structure (300) so as to extend axially outward therefrom, each of the hanger members comprising a guide part (605) adapted to engage an interior wall (203) of a second tubular structure (200); at least one cable (615) connecting the hanger members (601) together; and a tension mechanism arranged to adjust a tension of the at least one cable (615). The tension mechanism is operable to adjust said tension to pivot the guide parts (605) into engagement with the interior wall (203) of the second tubular structure (200) when the first tubular structure (300) is moved axially toward the second tubular structure (200), thereby to guide the first tubular structure (300) into axial alignment with the second tubular structure (200).

Abstract: A benchmark state space model construction method for an offshore wind turbine is provided. The benchmark state space model is constructed by the modal information of the first several orders of the high-order finite element model of the offshore wind turbine. Since the benchmark state space model is only established by the first several orders of the high-order finite element model, the time domain analysis of the offshore wind turbine using the benchmark state space model instead of the high-order finite element model can improve the calculation efficiency and reduce the calculation cost. The benchmark state space model construction method solves the problem of low computational efficiency and high computational cost of time domain analysis of offshore wind turbines using high-order finite element models due to the excessive number of high-order finite element units in existing technologies.

Abstract: The invention provides energy recovery or heat pump system comprising a plurality of Shape-Memory Alloy (SMAs) or Negative Thermal Expansion (NTE) elements arranged to define a core and housed in an immersion chamber. A first fluid can be introduced into the chamber provides a first temperature change to activate the core from a first state to a second state and a second fluid is introduced at a second temperature to activate the core from the second state to the first state. A controlled gas is inserted into the chamber between the first fluid and the second fluid. The advantage of the invention is that increased efficiency and power production from the SMA/NTE engine is achieved, or increased CoP within the SMA/NTE heat pump. By eliminating energy destruction via the mixing of fluids, the power production cycle can either operate faster, which means the same quantity of SMA/NTE material can produce more power, or a lower number of NTE strands can be used to create the same power that allow mixing to occur.

Abstract: Actuator assemblies and methods of operating actuator assemblies are provided, in particular with the aim of reducing bearing jitter.

Abstract: An improved fluid sample pump with the combination of an in-line pressure relief valve, an in-line, synthetic lubrication oiler associated with an air-actuation port, a stainless steel actuator housing with a centered air-actuation input port and a friction-reducing, anticorrosive coating on the interior thereof, an actuator piston with polyurethane O-rings, a shot-peened, zinc-coated music wire compression coil actuator piston return spring.

Abstract: The invention relates to a pump device comprising a pump piston (12) which is longitudinally movable in a pump housing (10) and which, controlled by a magnetic actuation apparatus (14), acts on an inlet valve (16) and an outlet valve (18), the inlet valve (16) opening during the intake stroke of the pump piston (12), and the outlet valve (18) opening during the delivery stroke thereof. The inlet valve (16) has an annular valve piston (20) which encompasses the pump housing (10) which has an entry point (22) and an exit point (24) for fluid.

Abstract: An induced flow reciprocating double disc pump assembly includes a rotating frame supporting a double disc pump, the rotating frame has a plurality of supports and a shaft defining a horizontal axis of rotation. A stationary frame supports the rotating frame and includes a plurality of bars and uprights and a flange bearing assembly engaged each of the shafts permitting rotation between the rotating frame and the stationary frame. A locking pin positions the rotating frame and the stationary frame at a plurality of positions relative to each other. A rotation crank is engaged to the shaft. The rotating frame has a first position relative to the stationary frame supporting the double disc pump in a vertical direction and a second position where the double disc pump is in a horizontal direction.

Abstract: A gas cooler includes a drain recovery part, a drain discharge flow path, a drain tank, and a ventilation flow path. In the drain recovery part, drain separated from gas is accumulated by cooling the gas in a cooling part. The drain tank includes a separation part in which the drain and the gas are separated, and a storage part in which the separated drain is stored. The drain discharge flow path has one end communicating with the drain recovery part and the other end communicating with the separation part. The ventilation flow path has one end communicating with the separation part, and the other end communicating with a gas flow path that leads to a downstream space above the drain recovery part and to a gas lead-out port.

Abstract: Hemodialysis and similar dialysis systems including a variety of systems and methods that make hemodialysis more efficient, easier, and/or more affordable, and include new fluid circuits for fluid flow in hemodialysis systems and a reciprocating diaphragm pump for pumping fluids. The reciprocating diaphragm pump includes a flexible diaphragm, a first rigid body having a curved pumping chamber wall, a second rigid body having an opposing curved control chamber wall. The diaphragm is interposed between the pumping chamber wall and the control chamber wall to define a pumping chamber and a control chamber. The diaphragm of the pump has a peripheral bead arranged to locate the diaphragm between the first rigid body and the second rigid body and a diaphragm body having a curved, semi-spheroid or domed shape.

Abstract: Peristaltic pump's tubing mount construct design in this invention uses a “&”-shape tubing routing path to hold a longer tubing section on its entry side to spread pumping motion's shear stress, hence a reduced tubing deformation rate and longer tubing life. Together with a thin fixed-speed synchronous AC motor, this minimum tubing mount makes a light weight peristaltic pump of one step tubing mount and dismount and zero-footprint hanging use conveniences, hence added reaches and applications.

Abstract: A system can include one or more processors; memory; a data interface that receives data; a control interface that transmits control signals for control of pumps of a hydraulic fracturing operation; and one or more components that can include one or more of a modeling component that predicts pressure in a well fluidly coupled to at least one of the pumps, a pumping rate adjustment component that generates a pumping rate control signal for transmission via the control interface, a capacity component that estimates a real-time pumping capacity for each individual pump, and a control component that, for a target pumping rate for the pumps during the hydraulic fracturing operation, generates at least one of engine throttle and transmission gear settings for each of the individual pumps using an estimated real-time pumping capacity for each individual pump where the settings are transmissible via the control interface.

Abstract: Provided is a dynamic characteristic measurement method for a cylinder block of a non-intrusive axial piston pump. The cylinder block is the main rotating component of the axial piston pump, and the dynamic characteristic of the cylinder block is more capable of reflecting the health condition of the pump than an external characteristic. A non-contact type measurement scheme is provided so as to reduce the influence of a measurement device on the motion of the cylinder block. Cylinder block contour signals and radial displacement signals are obtained by measuring the radial displacement of two sections of the surface of the cylinder block under different working conditions in the perpendicular directions, and then the cylinder block contour signals are accurately removed from the radial displacement signals to obtain the translational and tilting motion characteristics of the cylinder block.

Abstract: A device including a reservoir configured to contain a lubricant. One or more sets of baffles are disposed in the reservoir. The one or more sets of baffles separate the reservoir into a hot zone and a cold zone. The one or more sets of baffles permit at least some flow of the lubricant between the hot zone and the cold zone. The device also includes a machine loop drain placed in the reservoir to drain lubricant returning from a machine into the hot zone. The device also includes a thermal management loop drain placed in the reservoir to drain lubricant returning from a thermal management system into the cold zone. The device also includes a thermal management loop inlet placed in the reservoir to draw lubricant from the hot zone. The device also includes a machine loop inlet placed in the reservoir to draw lubricant from the cold zone.

Abstract: A device including a reservoir configured to receive a lubricant from a machine lubricated with the lubricant. The device also includes a pressure equalizer connected to the reservoir. The device also includes a first loop comprising a first line system through which the lubricant flows between the machine and the reservoir. The lubricant within the first loop is at a first pressure. The device also includes a temperature regulation system configured to regulate a temperature of the lubricant. The device also includes a second loop comprising a second line system through which the lubricant flows between the temperature regulation system and the reservoir. The lubricant within the second loop is at a second pressure that is less than the first pressure. The second loop is separate from the first loop.

Abstract: A cartridge pump having at least one component that is held in a non-resilient and non-detachable manner. The at least one component may be held in a non-resilient and non-detachable manner without a screw connection, by at least one bushing, or a washer pressed onto a pin. Further, the at least one component may be an inlet section, a pump section, a control plate, a pump holder, and/or a motor housing.

Abstract: A high pressure pump comprising a fluid end mechanically coupled to a power end. The power end is modular and comprises a crankshaft section, a crosshead section, and a connector section coupled together by a first set of stay rods. The fluid end comprises a plurality of fluid end sections positioned in a side-by-side relationship. Each of the plurality of fluid end sections are attached to the power end using a plurality of second set of stay rods.

Abstract: A hermetic compressor including a casing; a motor inside the casing, and including a rotor and stator; a drive shaft that rotates with the rotor; a compression unit below the motor to compress refrigerant and discharge compressed refrigerant to an inside of the casing; and an oil blocking guide above the motor to rotate with the rotor. The oil blocking guide includes an oil blocking plate formed in a disk shape, an oil guide part extending outward and upward from an edge of the oil blocking plate, and a support part connecting the oil blocking plate to the drive shaft and space the oil blocking plate from the rotor. The oil blocking plate and the oil guide part block upward movement of oil passing through the motor, and guide the oil to an inner circumferential surface of the casing through centrifugal force while the oil blocking guide is rotating.

Abstract: The present disclosure relates to a rotary vane vacuum pump 300 (300?) comprising a gas ballast assembly 330. The gas ballast assembly 330 comprises a gas ballast passage fluidly connected to a stator chamber 212 of the pump 300, a gas ballast valve 334 configured to selectively open and close the gas ballast passage depending on the relative gas pressure across the valve 334, and a gas ballast buffer chamber 360 fluidly connected to the gas ballast passage upstream of the gas ballast valve 343, which is in selective fluid communication with the exterior of the pump 300 (300?). The present disclosure also provides a related method of communicating ballast gas to a rotary vane vacuum pump 300 (300?).

Abstract: An information processing apparatus detecting presence or absence of abnormality of a vacuum pump derived from a product produced within a target vacuum pump, including: a determination unit configured to determine a normal variation range or a normal time variation behavior of a target state quantity which is a state quantity varying depending on a load of gas flowing into the vacuum pump, based on at least one of past target state quantities of the target vacuum pump or another vacuum pump; and a comparison unit configured to compare a current target state quantity of the target vacuum pump with the normal variation range or the normal time variation behavior and output the comparison result.

Abstract: A scroll compressor is disclosed. The scroll compressor may include a back pressure hole formed through a non-orbiting scroll and a back pressure chamber assembly such that a compression chamber and a back pressure chamber communicate with each other. A back pressure valve may be disposed inside of the back pressure hole and move along a longitudinal direction of the back pressure hole by a pressure difference between the compression chamber and the back pressure chamber, to vary a flow path area of the back pressure hole. The back pressure valve may include a valve body that extends in an axial direction and a plurality of holes formed through the valve body in the axial direction. With the configuration, pressure pulsation in the back pressure chamber may be suppressed or prevented.

Abstract: A two-phase liquid-gas flow system for testing electrical submersible pumps (ESP) includes an oil pump, a water pump, an oil storage tank, a water storage tank, a pressurized air system, an air pressure regulator (PR), and a transparent test section with the ESP. The pressurized air system includes air storage tanks, compressors, and air flow meters (AFM). The oil pump and the water pump supply oil and water from the oil storage tank and the water storage tank through an oil flow meter and a water flow meter, respectively, to the transparent test section. The air storage tanks are in fluid communication with the PR by valves, which channel air through the PR and the AFMs to the transparent test section. A camera is provided to capture photos and videos of flow patterns of the working fluid in the transparent test section.

Abstract: A neck fan includes an arc-shaped shell and a fan assembly. The arc-shaped shell is configured to be worn around a neck of a user. The shell has a first side and a second side opposite to the first side. Each of the first side and the second side defines air inlets. At least one of the first side and the second side defines air outlets. The shell further defines a receiving space, and the receiving space includes an air duct communicating with the air inlets and outlets. The fan assembly is received in the receiving space and configured to drive the air to flow from the air inlets of both sides, through the air duct, reaching the air outlets.

Abstract: A gas processing system includes a vessel defining a cavity for processing a gas. The vessel includes a process gas inlet for accepting process gas at an input pressure, and a process gas outlet for discharging process gas at an output pressure. The gas processing system further includes a shaft coupled to the vessel and a multistage sealing system comprising multiple seals spaced along the shaft. The shaft is configured to transfer mechanical energy to or from gas in the vessel. Each adjacent pair of seals defines a corresponding pressure space therebetween. One of the pressure spaces is an equalizing pressure space in hydraulic communication with the process gas inlet via a flow line, such that in operation, pressure in the equalizing pressure space is maintained at an equalized pressure with respect to a pressure in the process gas inlet.

Abstract: A blower of the present disclosure includes: a lower case having a suction port; an upper case which has a pair of towers that are spaced apart from each other and form a space through which a discharge air flows therebetween; and a blower fan which is disposed inside the lower case and discharges air to the upper case, wherein each of the pair of towers has a discharge port that is elongated in an up-down direction and disposed closer to a rear end of the tower than a front end, and has an air guide, which is disposed therein, that guides the air discharged by the blower fan to the discharge port, wherein the air guide is convex upward, has one end disposed near a middle between the front end and the rear end of the tower, and has the other end disposed near a middle of a vertical height of the discharge port, wherein the other end is disposed higher than the one end, so that the direction of air flow discharged from the fan can be smoothly switched to the discharge port side by only a single air guide, ther

Abstract: A fan waterproof structure includes a frame body and a stator assembly to configure as two individual components. The frame body has a base seat and a circumferential wall. Multiple first support members horizontally extend from the base seat to connect with the circumferential wall. The stator assembly is disposed on the base seat and has an electrical wire. A waterproof plastic layer is disposed on the stator assembly to enclose the stator assembly. A second support member horizontally extends from the waterproof plastic layer to connect with the circumferential wall. The electrical wire is disposed in the second support member to achieve good waterproof effect.

Abstract: A ceiling fan having a motor assembly that can be secured to a structure, for example, by a downrod and a hanger bracket assembly. A light kit can optionally be carried by the motor assembly. The motor assembly can include a housing to which can be integrated or attached to a blade hub. Blades for the ceiling fan can be mounted to the blade hub.

Abstract: A dynamic compressor includes an impeller having impeller vanes disposed around a hub, a shroud, and a diffuser having a shroud surface adjacent to the shroud and a hub surface adjacent to the hub, wherein the diffuser is circumferentially disposed around the impeller. The diffuser includes a plurality of diffuser vanes extending from the hub surface to the shroud surface, each having a vane leading edge and a vane trailing edge. The diffuser includes a centrifugal acceleration stabilizer ring formed in the shroud surface located in a vaneless region defined between an impeller trailing edge and the vane leading edge. The centrifugal acceleration stabilizer ring stabilizes the flow of the fluid by changing the circumferentially-flowing high velocity fluid flow exiting the impeller into a radially-flowing high velocity fluid flow before entering the diffuser, improving the efficiency of the dynamic compressor.

Abstract: A fan shroud for a vehicle heat-exchange module, having a wall configured to at least partially block the airflow through the fan shroud between a front and a back thereof, with a first opening for enabling airflow through the fan shroud between a front and a back thereof. The fan shroud further includes fasteners adapted to mount the fan shroud in an inclined position with respect to the ground, and a first drainage opening for a fluid, arranged at a bottom of the fan shroud and a first slope with a lowest point being at the level of the first drainage opening when the fan shroud is in the inclined position.