20 results about "Flow oscillation" patented technology

The embodiment of the invention provides a control method, device and equipment of a turbocharger and a readable storage medium. The method comprises the steps of obtaining a running condition corresponding to a vehicle; a surge line corresponding to the turbocharger is determined, wherein the surge line is used for representing the airflow oscillation phenomenon of gas in the axis direction of the gas compressor; and under the condition that the operation condition and the surge line meet the preset relation, the first opening and closing angle of the waste gas bypass valve is adjusted, or the second opening and closing angle corresponding to the vehicle power pedal is adjusted. The purpose that the corresponding operation working condition of the vehicle is far away from the surge line is achieved, then the turbocharger is promoted to be in the normal working state, and the situation that the turbocharger emits high-frequency Hiss noise to bring negative driving experience to a driver is avoided.

This invention relates to the field of flow battery technology and discloses a method and system for regulating self-excited oscillation in flow batteries. By integrating a flow oscillation generator into the electrolyte circulation loop of the flow battery, the periodic vortex ring oscillation and acoustic-fluid positive feedback phenomenon generated by the flow within the resonant cavity of this device are utilized to achieve pulsating regulation of electrolyte flow rate and pressure. This fundamentally improves the convective mass transfer efficiency at the electrode / electrolyte / diaphragm interface within the flow battery stack, thereby alleviating concentration polarization at the battery reaction interface caused by factors such as uneven flow rate, thickened diffusion boundary layer, and restricted ion migration. Furthermore, this device eliminates the need for long-term, additional electrical drive and complex control components, exhibiting a simple structure and stable operation.

The utility model relates to the technical field of three-way valves, and discloses a three-way valve structure which comprises a shell 1 and a valve element 2, a ventilation structure is arranged in the shell 1 and the valve element 2, the ventilation structure comprises an air inlet 3, a first air outlet 4, a second air outlet 5, a first through hole 6 and a second through hole 7, the air inlet 3 is formed in one end of the shell 1, and the first air outlet 4 is formed in the other end of the shell 1. A first air outlet 4 and a second air outlet 5 are formed in the other end of the shell 1, and a first through hole 6 and a second through hole 7 are machined in the valve element 2. According to the three-way valve structure, the air flow direction can be rapidly switched, and the output pressure adjustment and air flow oscillation functions can be achieved by controlling the position of the valve; the oscillation frequency and amplitude can be controlled according to requirements; through the combination of the valves, air can be fed through the same air inlet, and therefore pipeline pollution is avoided.

To provide technology with which it is possible to suppress overlapping of weld sections of a manifold and each of a pair of sensor tubes.SOLUTION: A vibration-type measurement device 1 pertaining to one embodiment comprises: a manifold 50; sensor tubes 52, 53 joined to the manifold 50 by welding, and in which fluid to be measured flows through; a vibration exciter 54 for causing the sensor tubes 52, 53 to vibrate in a direction to come closer and a direction to separate; vibration pickups 55, 56 which are disposed upstream and downstream of the location in the sensor tubes 52, 53 that is vibrated by the vibration exciter 54, and which output a signal corresponding to the relative displacements of the sensor tubes 52, 53. The manifold 50 includes a hole 504 into which the sensor tube 52 is inserted, and a hole 505 into which the sensor tube 53 is inserted, and the surface 508a where the hole 504 is provided and the surface 508b where the hole 505 is provided are separated by a groove 509 between the hole 504 and the hole 505.SELECTED DRAWING: Figure 5

The embodiment of the invention provides a double-channel flow control valve and positive and negative pressure medical equipment. The double-channel flow control valve comprises a valve body and a valve element, the valve body is provided with a hollow inner cavity, and the valve body is provided with a first input port, a second input port and a first output port; the valve element is arranged in the hollow inner cavity and provided with a first flow channel, and one end of the first flow channel communicates with the first output port. The valve element is movably connected to the hollow inner cavity so that at most one of the first input port and the second input port can communicate with the other end of the first flow channel. When the first input port is communicated with the first flow channel, the first input port, the first flow channel and the first output port form a positive pressure channel; when the second input port communicates with the first flow channel, the second input port, the first flow channel and the first output port form a negative pressure channel. According to the dual-channel flow control valve, rapid switching between a positive pressure channel and a negative pressure channel can be achieved, continuous adjustment of flow or pressure can be achieved, and a flow oscillation waveform or a pressure oscillation waveform meeting requirements can be output.

An insufflator for exposing structures within an internal cavity forming a confined volume within an animal or human body, the apparatus including: an input conduit for exchanging gas with the confined volume; a gas insufflator for insufflation of gas into the confined volume through the input conduit, wherein the gas insufflator is configured to deliver an insufflator pressure to the confined volume, wherein the gas insufflator is configured to (super)impose at least one pressure or flow oscillation to obtain a forced oscillating pressure or flow delivered to the confined volume, the forced oscillating pressure or flow having at least one component with a frequency and an amplitude; a monitoring unit for monitoring a response of the internal cavity to the forced oscillating pressure or flow for determining one or more physical properties of the internal cavity; and an adapter unit for adjusting the insufflation pressure based on the determined one or more physical properties of the internal cavity.

A turbocharger control method and apparatus, a device, and a readable storage medium. The method comprises: acquiring an operating condition corresponding to a vehicle (200); determining a surge line corresponding to a turbocharger (210), the surge line being used for representing a gas flow oscillation phenomenon of gas along the axial direction of a compressor; and when the operating condition and the surge line satisfy a preset relationship, adjusting a first opening angle of a wastegate valve, or adjusting a second opening angle corresponding to a vehicle accelerator pedal (220).

A double-sided fluidic oscillator, includes a primary feedback loop unit, a secondary feedback loop unit with two outlet and one inlet, and a common mixing chamber. Two perpendicular oscillator jets operating at different oscillation frequencies produce perpendicular and bi-stable pulsating flow oscillations, simultaneously. The proposed design of the fluidic oscillator is a double-sided fluidic oscillator. Also, disclosed is a method of achieving an enhanced heat and mass transfer by better mixing due to the wide sweeping pattern over a target surface using the double-sided fluidic oscillator.

The invention relates to the technical field of air conditioner compressors, in particular to an air conditioner compressor dynamic adjusting method and system adaptive to a wide-temperature-range working medium. The method comprises the steps that an air conditioner compressor information set of a multi-temperature-zone compartment is obtained, on the basis, the gas phase evacuation risk caused by an air conditioner compressor in a refrigeration zone and the liquid phase inrush risk caused by the air conditioner compressor in a freezing zone under a wide-temperature-zone working medium are analyzed, and a phase state risk information set is obtained; on the basis, the coupling effect of local flow state sudden change, caused by vehicle movement, of each temperature zone on pressure and flow oscillation of the whole system through sharing loop amplification is analyzed, and a flow state instability information set is obtained; on the basis, conflict information between a gas phase evacuation prevention control instruction and a liquid phase liquid impact prevention control instruction caused by the coupling effect is analyzed, and a multi-target control conflict information set is obtained; and based on this, a dynamic regulation and control strategy is generated, and an air conditioner compressor dynamic regulation log is output. Air conditioner pressure and flow oscillation are reduced, safe and stable operation of an air conditioner compressor is guaranteed, and the service life of equipment is prolonged.

The invention relates to the technical field of hydraulic systems, and discloses an automatic diagnosis and exhaust method and system for air invasion of a hydraulic system, and the method comprises the steps: carrying out the frequency band segmentation of a state feature sequence of the hydraulic system, and obtaining a pressure gradient sequence and a flow oscillation component; fitting the pressure gradient as a rigidity curve, and extracting a slope absolute value as a rigidity change rate; energy spectrum integration is conducted on the flow oscillation component to obtain oscillation energy, and then the flow pulsation deviation degree is obtained through spectrum entropy calibration with the background energy spectrum as the benchmark. And when the rigidity change rate is lower than the threshold value and the flow pulsation deviation degree is higher than the threshold value, an exhaust program is started, an exhaust valve of the hydraulic system is driven to adjust the airborne state of the hydraulic system, and the output flow of a hydraulic pump is adjusted based on the airborne state. According to the invention, the accuracy of air invasion diagnosis of the hydraulic system and the automation efficiency of exhaust control can be improved.

A cooling system for a gas turbine is disclosed comprising a vortex tube defining a body having an inlet port connectable to a compressor to receive compressed fluid. The vortex tube is configured to separate flow of the compressed fluid into a cold stream and a hot stream. The cooling system further includes a fluidic oscillator in fluid communication with the vortex tube, the first end of which is connected to a cold stream outlet port of the vortex tube to receive the cold stream. The fluidic oscillator is configured to generate at least two oscillator jets of the cold stream, operating at different oscillation frequencies, to produce biaxial pulsating flow oscillations onto a surface of at least one gas turbine blade of the gas turbine. A more efficient cooling system will result from the proposed cooling system's increased cooling impinging surface area and significantly reduced cooling fluid temperature differential.

The application relates to the technical field of air conditioner compressors, in particular to an air conditioner compressor dynamic adjustment method and system suitable for wide-temperature-range working medium. The method comprises the following steps: acquiring an air conditioner compressor information set of a multi-temperature-zone vehicle compartment; based on the information set, analyzing gas phase evacuation risks caused by the air conditioner compressor in the refrigeration zone and liquid phase surge risks caused by the air conditioner compressor in the freezing zone under the wide-temperature-range working medium, and obtaining a phase state risk information set; based on the information set, analyzing the coupling effect of the local flow state mutation in each temperature zone caused by vehicle movement on the pressure and flow oscillation of the whole system through the shared circuit amplification, and obtaining a flow state instability information set; based on the information set, analyzing the conflict information between the anti-gas-phase-evacuation control instruction and the anti-liquid-phase-surge control instruction caused by the coupling effect, and obtaining a multi-target control conflict information set; based on the information set, generating a dynamic regulation strategy, and outputting an air conditioner compressor dynamic adjustment log. The air conditioner pressure and flow oscillation are reduced, the safe and stable operation of the air conditioner compressor is guaranteed, and the service life of the equipment is prolonged.

A buoyant hydrodynamic pump is disclosed that can float on a surface of a body of water over which waves tend to pass. Embodiments incorporate an open-bottomed tube with a constriction. The tube partially encloses a substantial volume of water with which the tube’s constriction interacts, creating and / or amplifying fluid-flow oscillations therein in response to wave action. Wave-driven oscillations result in periodic upward ejections of portions of the water inside the tube that can be collected in a reservoir that is at least partially positioned above the mean water level of the body of water, or pressurized by compressed air or gas, or both. Water within such a reservoir may return to the body of water via a turbine, thereby generating electrical power (making the device a wave engine), or the device’s pumping action can be used for other purposes such as water circulation, propulsion, dissolved minerals extraction, or cloud seeding. Methods are disclosed for manufacture of hydrogen at sea and for delivery of said hydrogen using a ship. Methods are disclosed for filling a hydrogen-loaded carrier ship at sea.

The invention relates to the technical field of medical equipment, in particular to a double-channel oscillation pump and an airflow oscillation control method, and aims at solving the problems that in the prior art, the oscillation frequency and amplitude of an oscillation airflow pump on a pump body cannot be accurately controlled, and the multi-channel switching function is not achieved. A cavity is formed in a pump body of the double-channel oscillation pump, the driving mechanism is arranged at the first end of the pump body, and the driving mechanism is fixedly connected with the pump body and used for driving a leather cup of the pump body to reciprocate so as to generate airflow. The first airflow channel is arranged on the pump body, the second airflow channel is arranged on the pump body, and the airflow oscillation mode of the second airflow channel is different from that of the first airflow channel. The two-channel oscillation pump and the airflow oscillation control method are used for accurately controlling the oscillation frequency and amplitude in the two-channel oscillation pump and achieving multi-channel switching in the two-channel oscillation pump.

The utility model provides an airflow oscillation reaction tower which comprises a tower body and an ultrasonic vibration device, a feed port and a discharge port are respectively arranged on the side surfaces of the upper part and the lower part of the tower body, a gas inlet pipe for introducing gas into the reaction tower is arranged at the lower part of the tower body, and an exhaust port is arranged at the top end of the tower body. A stirrer, a filler layer and a heating coil are sequentially arranged in the tower body from top to bottom, the stirrer comprises a stirring shaft and multiple layers of stirring blades arranged on the stirring shaft, the filler layer is located in the middle of the tower body and used for uniformly mixing gas and reaction liquid, the heating coil is used for controlling the reaction temperature in the tower, and a transmission device is arranged at the top end of the tower body. The transmission device is connected with the upper end of the stirring shaft, and an ultrasonic leading-in hole is formed in the outer wall of the tower body and used for installing an ultrasonic vibration device. According to the utility model, internal materials are fully reacted under the action of airflow oscillation, and the reaction efficiency and the product quality are improved.

The invention provides a self-adaptive resistance adjusting device and method for restraining natural circulation flow oscillation, the self-adaptive resistance adjusting device is installed on a descending section pipeline of a natural circulation system, and the adjusting device comprises a rectifying chamber 1, a baffle 2, a spring 3, a ball 4, a limiting plate 5 and a supporting rod 6; the rectifying chamber 1 is larger than the pipeline of the natural circulation descending section in size; the baffle 2 is welded to the inner wall of the rectifying chamber 1, and the flow area of the rectifying chamber 1 is not smaller than that of a main pipeline. The spring 3 is connected with the baffle 2 and the sphere 4; the limiting plate 5 is fixed to the outlet end of the rectifying chamber 1 through the supporting rod 6 and used for limiting the displacement range of the ball 4. And the spring 3 and the ball 4 are linked to realize self-adaptive adjustment of the flow area along with the flow speed so as to inhibit flow oscillation under the single-phase to two-phase transition working condition. The technical scheme provided by the invention is used for reducing the natural circulation flow fluctuation peak value and improving the system operation stability when the natural circulation flow generates single-phase to two-phase transition conditions such as boiling flash evaporation and the like.

The invention relates to the technical field of lung function exercise, and discloses an oscillating type breathing blowing device which comprises a semi-conical barrel and a straight plate which are connected and define a ball cavity, an air inlet channel is formed in the top of the ball cavity, and a bottom opening is formed in the bottom of the ball cavity; the floating ball is movably arranged at a bottom opening of the ball cavity in a blocking manner; the top of the bottom cylinder is connected with the semi-conical cylinder through a connecting cylinder; the collector is detachably mounted at the bottom opening of the bottom cylinder; the side face of the bottom cylinder is further communicated with an exhaust pipe. According to the oscillating type breathing blowing device, the ball cavity is defined by the semi-conical barrel and the straight plate, the floating ball is arranged at the bottom opening, the ball body periodically opens or closes the bottom opening, and therefore positive pressure and OPEP (pressure / flow oscillation) can be generated at the same time in the expiration period, opening of a small airway can be maintained, and mucus is promoted to loosen and migrate.

The utility model discloses a high-stability torrent oscillation washing machine which comprises a water tank and a hexagonal oscillation roller, a central shaft is fixedly sleeved with the hexagonal oscillation roller, and the cross section of the hexagonal oscillation roller is of a regular hexagonal structure. A section of plate surface extends along the extension direction of the edges on each of six joint points where the edges of the regular hexagon are jointed to form a spoiler, a hollow material guide cylinder sleeves the outer side of the hexagonal oscillation roller in a clearance manner, the material guide cylinder can rotate relative to a central shaft, a plurality of open holes are uniformly formed in the outer circumferential surface of the material guide cylinder, and the open holes are communicated with the inner side of the hexagonal oscillation roller. Supporting shafts are arranged on the water tank and on the upper portion and the lower portion of the two sides of the material guiding barrel in a matched mode respectively, and each supporting shaft is in rolling contact with the two ends of the material guiding barrel through two rollers respectively. By means of the device, a solution can permeate into fabric fibers better, meanwhile, dirt on the surface of the fabric can fall off better, the washing effect is enhanced, rotation of the material guide cylinder is very stable, and the quality of the fabric is guaranteed.

The invention provides an adjustable double-hydrofoil non-uniform incoming flow generating device which is composed of a water tunnel connecting module, a double-hydrofoil incoming flow oscillation generator module, a driving system and a data acquisition system, and a non-uniform flow field with good symmetry can be generated through in-phase flapping of double hydrofoils. And by matching with measuring devices such as a laser Doppler velocimeter, a pressure acquisition system and a high-speed camera, adjustability and controllability of an incoming flow generation process can be maintained while multiple water tunnel tests are carried out, so that powerful support can be provided for research on complex flow mechanisms such as cavitation evolution and underwater vehicle controllability.

The invention discloses an air conditioner volute tongue, an air conditioner indoor unit and an air conditioner in the technical field of air conditioner products. A windward face and an air guide face are arranged on a volute tongue body, a plurality of flow guide ribs are arranged in the length direction of the volute tongue body at intervals, flow guide grooves are formed between the adjacent flow guide ribs, the flow guide ribs are parallel to the cross section of the volute tongue body, and the flow guide ribs are arranged on the windward face in the length extension direction of the flow guide ribs and the depth extension direction of the flow guide ribs perpendicular to the windward face. And the flow guide ribs on the windward side are in a narrow-top and wide-bottom state. When the fan runs at a high speed, due to the fact that the flow guide ribs are in the narrow-end-up form, the flow guide ribs similar to sharp teeth are beneficial to effectively cutting and stabilizing airflow, and the problem that the stability of the cross-flow fan becomes poor due to airflow oscillation is solved; and the sharp tooth structure can improve the pressure pulsation intensity of the airflow and change a blade trailing edge falling vortex structure, so that the aerodynamic noise of the fan is reduced.