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31results about How to "Reduce vortex phenomenon" patented technology
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Combined feeding distributor
The invention relates to a combined feeding distributor which comprises a double tangential feeding distributor and a double-row blade feeding distributor, wherein an inner sleeve, a cover plate and a tower wall of the double tangential feeding distributor form an annular space with closed top and open bottom; guide plates are arranged between the tower wall and the inner sleeve; the two sides of the guide plates are fixed on the tower wall and the inner sleeve respectively; guide plate reinforcing rib plates are arranged on the two sides of the guide plates; the heights of the guide plates gradually change from a feed port to annular channels on the two sides; a closure plate is arranged at the tail end of the inner sleeve to prevent a tangential material from impacting the double-row blade feeding distributor; guide blades of the double-row blade feeding distributor are fixed via an upper baffle and a lower baffle; guide blade reinforcing plates are arranged between the guide blades; the baffles are trapezoids; longer bottom edges of the trapezoids are located on one side of the feed port; the guide blades are fixed between the upper baffle and the lower baffle. The material is subjected to diversion, so that disturbance of gas on tower kettle liquid and a vortex generated by the gas in a tower are weakened, entrainment of the liquid is reduced, and upflow is further uniformly distributed.
Owner:TIANJIN UNIV
Minitype airflow type gyro
InactiveCN102980567AImprove stabilityAvoid distractionTurn-sensitive devicesEngineeringPiezoelectric pump
The invention relates to a minitype airflow type gyro. The gyro comprises a shell, wherein the two ends of the shell are sealed through an end cover, and the shell is internally provided with a testing cavity body; the testing cavity body is formed with an air inlet nozzle and an air outlet; a thermosensitive element is arranged in the position approaching the air outlet in the testing cavity body; a gas circulation channel is arranged between the shell and the testing cavity body and is used for connecting the air inlet nozzle and the air outlet; the outer side of the air inlet nozzle of the testing cavity body is provided with a piezoelectric pump used for pressing the gas into the testing cavity body, and the testing cavity body, the gas circulation channel and the piezoelectric pump form a closed cycle of the gas; the testing cavity body is in central symmetry along the radial direction; from the air inlet nozzle to the air outlet, the testing cavity body successively comprises a guide section used for guiding the diffusion angle of the airflow bundle, a flow section used for leading an airflow bundle to flow smoothly and a confluence section used for collecting the airflow bundle to the air outlet through a smooth inclined plane; and the thermosensitive element is arranged on the tail end of the confluence section. The minitype airflow type gyro provided by the invention has the advantages that the measuring accuracy and the stability of the gyro operation are improved.
Owner:BEIJING INFORMATION SCI & TECH UNIV
Axial fan
The invention discloses an axial fan, comprising a hub and a plurality of blades arranged on the periphery of the hub. Leading edges of the blades are provided with thickened sections, the thickened sections extend from the root of the hub to outer edges of the blades, and extend by a set length from the leading edges of the blades to the rear edges of the blades along an equal-primitive arc; and the blades bend to a suction surface or a pressure surface, so the suction surface or the pressure surface is enabled to form a curved surface. During the movement of the axial fan, the shudder and the eddy current phenomenon of the blades are reduced, the noise produced by the axial fan is decreased, and the overall performance of the axial fan is improved.
Owner:GREE ELECTRIC APPLIANCES INC
Air fryer with efficient cold air circulation function
The invention provides an air fryer with an efficient cold air circulation function. The air fryer comprises a shell; the shell comprises an upper shell body and a lower shell body; an upper air inlet is formed in the upper shell body; a lower air inlet is formed in the lower shell body; an inner container is arranged in the lower shell; a wind scooper is arranged in the upper shell body; a window for blowing out cold air and hot air is formed in the wind scooper; a lower cold air interlayer is formed between the lower shell body and the inner container; an upper cold air interlayer is formed between the upper shell body and the wind scooper; a heat insulation cover is arranged in the wind scooper; the wind scooper is divided into an upper cold air cavity and a lower hot air cavity by the heat insulation cover; an air duct wall is annularly arranged on the upper end surface of the wind scooper and is provided with a cold air outlet aligned with the window; the upper end face of the wind scooper is further provided with a plurality of wind guide ribs which are arranged at intervals and surrounded by the air duct wall; the wind guide ribs are arranged around a cooling fan in the vertical projection direction, and cold air in the cold air cavities flows to the cold air outlet under the guidance of the wind guide ribs. Loss and loss of the cold air can be reduced, and the cold air can be discharged more smoothly.
Owner:宁波爱科特厨电科技有限公司
Intelligent noise reduction cabinet for server
ActiveCN110913649AReduce vortex phenomenonIncrease in sizeServersCasings/cabinets/drawers detailsHoneycombStructural engineering
The invention discloses an intelligent noise reduction cabinet for a server, which comprises a cabinet body, a noise reduction mechanism, a mounting mechanism and a heat dissipation mechanism, and ischaracterized in that the mounting mechanism is arranged on the side wall of the cabinet body, the cabinet body is connected with the noise reduction mechanism through the mounting mechanism, and theheat dissipation mechanism is arranged on the inner wall, away from the mounting mechanism, of the cabinet body; the noise reduction mechanism comprises a frame body, a limiting groove and a noise reduction unit; wherein the frame body is of a box body structure with an opening in one side, a limiting groove is formed in the inner wall of the frame body, mounting holes matched with the noise reduction units are formed in the outer wall, away from the opening, of the frame body, the mounting holes are distributed in a honeycomb shape, the sections of the multiple sets of noise reduction units are hexagonal, and each noise reduction unit is of a cylinder structure with an opening in one end. The side wall, away from the noise reduction unit, of the frame body is attached to the outer wall ofthe cabinet body, and a sealing washer is arranged on the side wall, away from the noise reduction unit, of the frame body. The noise reduction mechanism and the heat dissipation mechanism cooperatewith each other, and the working efficiency of the noise reduction mechanism and the heat dissipation mechanism is improved.
Owner:ANHUI FEIKAI ELECTRONICS TECH CO LTD
Venturi pipe flow measuring device and mounting method
ActiveCN108593020AReduce total pressure lossEasy to installVolume/mass flow by differential pressureThroatPositive pressure
The invention discloses a Venturi pipe flow measuring device and a mounting method. The flow measuring device comprises a cylindrical inlet section, a conical contraction section, a cylindrical throatpipe section and a conical diffusion section which are arranged in sequence, wherein a positive pressure tapping hole is formed in the cylindrical inlet section in the radial direction, a negative pressure tapping hole is formed in the cylindrical throat pipe section in the radial direction, the conical contraction section, the cylindrical throat pipe section and the conical diffusion section ofa Venturi pipe constitute an integrally formed casting, and the outer pipe diameter of two ports of the conical contraction section and the conical diffusion section of the Venturi pipe is matched with the inner pipe diameter of the cylindrical inlet section; profiles of the conical contraction section, the cylindrical throat pipe section and the conical diffusion section of the Venturi pipe are hyperbolic curves, and positioning pieces are arranged at the two ends of the conical contraction section and the conical diffusion section of the Venturi pipe respectively. The Venturi pipe flow measuring device is simple in processing, convenient to mount and low in processing and manufacturing cost and can meet the requirement of engineering surveying.
Owner:江阴市节流装置厂有限公司
Improved engine oil cooling module shell
ActiveCN107061971AReduce shockAvoid enteringLubricating pumpsLubrication elementsInlet channelCavitation
The invention discloses an improved engine oil cooling module shell which is provided with an engine oil pump rotor cavity, an oil drainage channel and an oil inlet channel. An extending oil blocking separation plate is arranged on the side, close to the rotor cavity, of the outlet end of the oil drainage channel and is in a J shape, and the bending direction of the tail of the oil blocking separation plate is consistent with the flowing direction of engine oil in the rotor cavity. Through the structure, high-pressure oil in the oil drainage channel is blocked by the oil blocking separation plate and prevented from directly entering the rotor cavity, and the high-pressure oil must be fully mixed with inlet oil at the lower side and then enters the rotor cavity, so that impact of the high-pressure oil to a rotor is lowered; meanwhile, the lower end of the oil blocking separation plate is of a bent structure with the direction being approximate to the flowing direction of the oil in the rotor cavity, so that the oil inlet direction is guided to be consistent with the flowing direction of the oil in the rotor cavity, counter-impact is reduced, and the cavitation risk is lowered.
Owner:HUNAN JIALI MACHINERY
Sealed insulating material bulkhead-penetrating device for strong electricity
ActiveCN104104039AIncrease pressureReduce strong magnetic fieldElectrical apparatusElectricityElectrical resistance and conductance
The invention relates to a sealed insulating material bulkhead-penetrating device for strong electricity which is indispensable for introducing the strong electricity into space with high tightness; a bulkhead-penetrating conductor is screwed in the wall of the sealed space in a threaded manner and fixed by an insulating seal spacer, an insulating hollow lead screw and a nut, and thereby tightness of the bulkhead-penetrating conductor and the bulkhead is improved; by using the spacers, gaskets and other materials, strong magnetic field generated by alternating current is reduced or weakened. The pressure of the silica gel seal spacer is increased by the insulating hollow lead screw and the insulating nut with threads. A binding post with large current and high performance is adopted to meet requirements on large current and low resistance. And two ends of the binding post are fixed by the combination of flat gaskets and nuts, and the strong magnetic field generated by the alternating current and the appearance of eddy current are reduced as much as possible; two sides of the bulkhead of the sealed space are basically symmetrically distributed, so that lever balance and screw pitch balance of the lead screw conductor are ensured, and tightness of connection of the bulkhead of the sealed space and the lead screw conductor is also ensured.
Owner:BEIHANG UNIV
Air intake system of automobile engine
ActiveCN103953476AImprove fermentation effectReduce vortex phenomenonCombustion-air/fuel-air treatmentMachines/enginesAir filterEngineering
The invention relates to and provides an air intake system of an automobile engine. The air intake system comprises an air-filtering air intake pipe assembly, an air filter assembly and an air-filtering air outtake pipe assembly, wherein the air intake end of the air filter assembly is connected with the air-filtering air intake pipe assembly; the air outtake end of the air filter assembly is connected with the air-filtering air outtake pipe assembly; the air-filtering air intake pipe assembly comprises an air-filtering air intake pipe, a separator, an air intake insertion pipe and a purge valve; the air-filtering air intake pipe is connected with the air filter assembly; the air intake insertion pipe and the separator are both arranged in the air-filtering air intake pipe; the separator is arranged between the air intake insertion pipe and the air filter assembly; the purge valve is connected with the air-filtering air intake pipe; the purge valve is located between the separator and the air filter assembly. The air intake system has the beneficial effects that as multi-stage filtering is formed, the filtering capability is improved, a vortex phenomenon is weakened, and the noise is lowered.
Owner:SAIC-GM-WULING AUTOMOBILE CO LTD
Ultrasonic metering device
PendingCN108871475AIncrease the itineraryMeet the requirements of measurement accuracyVolume/mass flow measurementSurface velocityTransducer
The invention discloses an ultrasonic metering device, belongs to the technical field of meter, and solves the problem that an existing ultrasonic metering device cannot meet measurement accuracy requirement of small flows such as flow of a household gas meter. The ultrasonic metering device comprises a casing and a transducer arranged on the casing, wherein the casing is provided with a meteringpassage for fluid to pass through, and the casing forms an inflow section and a measuring section along the fluid flow direction. The transducer comprises a transmitting vibrator and a receiving vibrator, and the transmitting vibrator and the receiving vibrator are mounted on the same side of the measuring section, so that the propagation path of the ultrasonic wave is V-shaped. The flow area of the inflow section is S1, and the flow area of the measuring section is S2, wherein S2 is less than S1, so that the surface velocity of the fluid flowing through the measuring section and the flight time difference during the ultrasonic measurement is increased, thereby improving the measuring accuracy. The device particularly satisfies the measurement accuracy requirements of small flows.
Owner:GOLDCARD HIGH TECH
Low-pressure circulating barrel
PendingCN114165951AGuaranteed recycling efficiencyReduce vortex phenomenonMechanical apparatusCorrosion preventionEngineeringCheck valve
The low-pressure circulating barrel comprises a barrel body, an air inlet and an air outlet are formed in the top of the barrel body, a backflushing opening is formed between the air inlet and the air outlet, an injection pipe is arranged in the barrel body, the bottom of the injection pipe is connected with a conveying pipe, one end of the conveying pipe is connected with an external pipe, and the other end of the conveying pipe is connected with an internal pipe. And an external box is fixedly arranged on the outer side of the barrel body. By arranging the external box, the external pipe and the conveying pipe, ammonia liquid entering the injection pipe from the air inlet is circularly conveyed in the barrel body through the conveying pipe and then enters the barrel body, the vortex phenomenon generated when the liquid enters the pump is greatly reduced, meanwhile, the resistance loss is reduced, and the liquid can adapt to the temperature in the barrel body in the conveying pipe when entering the barrel body, so that the stability of the liquid is improved. And when the liquid level reaches the warning height, the electromagnetic valve and the check valve are opened, the liquid can be conveyed into the external connection box from the external connection pipe, and accidents caused by too high liquid level are avoided.
Owner:江苏润华膜业科技有限公司
Efficient combining integration module
The invention provides an improvement on electric precipitator polar plate and polar line design and relates to an efficient combining integration module which is applied to a device for collecting electrical charge smoke particles in an electric precipitator. The efficient combining integration module is characterized by being different from various airstream shield type dust collecting polar plates formed by rolling metal plates in the past. The efficient combining integration module has high airflow permeability and can provide enough sedimentation area for electrical charge smoke particles, and especially has a high ability to adsorb the submicron-order electrical charge smoke particles. The electric precipitator adopting the efficient combining integration module has high strength and high stability, and can greatly increase the wind speed of an electric field, shorten the length of a sedimentation channel in the electric field and effectively reduce secondary flying dust, equipment transportation, installation and adjustment are easy and convenient, operation is efficient, the investment and operation cost of the electric precipitator is reduced substantially, and the emission concentration technical performance index is lower than that of a bag type dust collector.
Owner:中电国核(北京)节能环保科技有限公司
UHP tire for improving wetland performance
InactiveCN108501622AMake up for concave defectsImprove water breaking abilityTyre tread bands/patternsHeight differenceEngineering
The invention discloses a UHP tire for improving wetland performance. The UHP tire for improving wetland performance comprises a tread with the total length of a crown arc being TDW. Longitudinal maingrooves extending in the circumferential direction of the tire are formed in the tread, and pattern blocks extending in the circumferential direction of the tire are formed between the longitudinal main grooves. The relationship that TDW / SN is greater or equal to 0.80 and less than or equal to 0.82 exists between the total length TDW of the crown arc and the nominal section width SN of the tire,and the relationship that TP / TDW is greater than or equal to 0.047 and less than or equal to 0.049 exists between the total length TDW of the crown arc and the height difference TP between center point of the crown arc and the end point of the crown arc. Each pattern block is designed with a thickened convex surface, so that the grounding edges of the pattern blocks present a convex state, and thedefect of the concave faces of grounding edges of the pattern blocks caused by the contraction of the tire compound is overcome; and at the same time, the grounding edges with convex surfaces improvethe water breaking capacity of the tire, effectively avoid the water slip during wheel driving, and improve the use safety and stability of the tire.
Owner:GITI RADIAL TIRE (ANHUI) CO LTD
Strong electric hermetic insulation through wall device
ActiveCN104104039BIncrease pressureReduce strong magnetic fieldElectrical apparatusElectricityElectrical resistance and conductance
The invention relates to a sealed insulating material bulkhead-penetrating device for strong electricity which is indispensable for introducing the strong electricity into space with high tightness; a bulkhead-penetrating conductor is screwed in the wall of the sealed space in a threaded manner and fixed by an insulating seal spacer, an insulating hollow lead screw and a nut, and thereby tightness of the bulkhead-penetrating conductor and the bulkhead is improved; by using the spacers, gaskets and other materials, strong magnetic field generated by alternating current is reduced or weakened. The pressure of the silica gel seal spacer is increased by the insulating hollow lead screw and the insulating nut with threads. A binding post with large current and high performance is adopted to meet requirements on large current and low resistance. And two ends of the binding post are fixed by the combination of flat gaskets and nuts, and the strong magnetic field generated by the alternating current and the appearance of eddy current are reduced as much as possible; two sides of the bulkhead of the sealed space are basically symmetrically distributed, so that lever balance and screw pitch balance of the lead screw conductor are ensured, and tightness of connection of the bulkhead of the sealed space and the lead screw conductor is also ensured.
Owner:BEIHANG UNIV
Solenoid assembly for solenoid directional valve
ActiveCN107180694BImprove cooling effectReduce vortex phenomenonElectromagnets with armaturesMagnetic exchangeEddy current
Owner:CHANGZHOU KANGSHIDA ELECTROMECHANICAL CO LTD
An intelligent noise reduction cabinet for servers
ActiveCN110913649BReduce vortex phenomenonIncrease in sizeServersCasings/cabinets/drawers detailsHoneycombStructural engineering
The invention discloses an intelligent noise reduction cabinet for a server, which comprises a cabinet body, a noise reduction mechanism, a mounting mechanism and a heat dissipation mechanism, and ischaracterized in that the mounting mechanism is arranged on the side wall of the cabinet body, the cabinet body is connected with the noise reduction mechanism through the mounting mechanism, and theheat dissipation mechanism is arranged on the inner wall, away from the mounting mechanism, of the cabinet body; the noise reduction mechanism comprises a frame body, a limiting groove and a noise reduction unit; wherein the frame body is of a box body structure with an opening in one side, a limiting groove is formed in the inner wall of the frame body, mounting holes matched with the noise reduction units are formed in the outer wall, away from the opening, of the frame body, the mounting holes are distributed in a honeycomb shape, the sections of the multiple sets of noise reduction units are hexagonal, and each noise reduction unit is of a cylinder structure with an opening in one end. The side wall, away from the noise reduction unit, of the frame body is attached to the outer wall ofthe cabinet body, and a sealing washer is arranged on the side wall, away from the noise reduction unit, of the frame body. The noise reduction mechanism and the heat dissipation mechanism cooperatewith each other, and the working efficiency of the noise reduction mechanism and the heat dissipation mechanism is improved.
Owner:ANHUI FEIKAI ELECTRONICS TECH CO LTD
A shell-and-tube heat exchanger
ActiveCN104406431BImprove flow field characteristicsEffective limitStationary tubular conduit assembliesShell and tube heat exchangerPlate heat exchanger
The invention provides a shell and tube heat exchanger. A U-shaped heat exchange tube system arranged in n layers from the inside to the outside is arranged in the heat exchanger, the layers of the U-shaped heat exchange tubes are arranged in parallel, and two ends are fixedly connected with a tube system end tube plate. An anti-collision limit unit is arranged between the layers of the U-shaped heat exchange tubes respectively and comprises two location plates and n+1 separation rods. The two location plates are arranged on the two sides of the U-shaped heat exchange tube system, and the ends are fixedly connected with the tube system end tube plate. Installation grooves of the separation rods are formed in the corresponding positions in the two location plates which are detachably connected with the separation rods, and the separation rods are arranged before and after each layer of the U-shaped heat exchange tubes to separate the adjacent U-shaped heat exchange tubes. The shell and tube heat exchanger has the advantages that good flow field characteristics are provided, and vortexes are reduced; limit is performed effectively, and scratching of the tube walls is prevented; the requirement for assembly size is not high, and the practicality is high; the limit is flexible, cutting and tube flattening processes of tube sections are reduced, the efficiency is improved, the cost is reduced, and the cost performance is high.
Owner:DONGFANG TURBINE CO LTD
Clothes dryer condenser core
The invention discloses a clothes dryer condenser core. The task of the invention is to provide a clothes dryer condenser core which increases the heat dissipating area and has good sealing effect and firm bonding. The task is completed as follows: the clothes dryer condenser core comprises a core and a cooling fin. Both ends of the condenser core are provided with U-shaped slots; grooves are arranged on the U-shaped slots; plate assemblies are put in the U-shaped slots of the condenser core and are connected with the grooves by bonding glue; the condenser core is formed by gluing a plurality of plate assemblies; and the middles of the plate assemblies present mold cavity channels. The plate assemblies comprise plate assembly frames, the grooves arranged on the U-shaped slots, the cooling fin and the bonding glue. The invention increases the heat dissipating area, reduces the vortex phenomena and has good sealing effect.
Owner:HENAN NEW KELONG ELECTRICAL APPLIANCES
Clean room
ActiveCN102865640BMore difficult to avoidAvoid pollutionMechanical apparatusConveyorsState of artEngineering
A clean room (10) for use in storing glass substrates. The clean room comprises a ventilation outlet (102), a first fan filter unit (200), and a second fan filter unit (300). The ventilation outlet (102) is arranged at the bottom part of the clean room. The first fan filter unit (200) is arranged at the top part of the clean room and is used to provide the clean room with clean air. The second fan filter unit (300) is arranged at the bottom part of the clean room and is used in tandem with the first fan filter unit (200) to form a vertical airflow, thereby reducing a vortex phenomenon in the clean room. The clean room solves the problem in the prior art that dust particles in the clean room are difficult to be discharged due to the vortex phenomenon.
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
A car engine air intake system
ActiveCN103953476BImprove fermentation effectReduce vortex phenomenonCombustion-air/fuel-air treatmentMachines/enginesAir filterEngineering
The invention relates to and provides an air intake system of an automobile engine. The air intake system comprises an air-filtering air intake pipe assembly, an air filter assembly and an air-filtering air outtake pipe assembly, wherein the air intake end of the air filter assembly is connected with the air-filtering air intake pipe assembly; the air outtake end of the air filter assembly is connected with the air-filtering air outtake pipe assembly; the air-filtering air intake pipe assembly comprises an air-filtering air intake pipe, a separator, an air intake insertion pipe and a purge valve; the air-filtering air intake pipe is connected with the air filter assembly; the air intake insertion pipe and the separator are both arranged in the air-filtering air intake pipe; the separator is arranged between the air intake insertion pipe and the air filter assembly; the purge valve is connected with the air-filtering air intake pipe; the purge valve is located between the separator and the air filter assembly. The air intake system has the beneficial effects that as multi-stage filtering is formed, the filtering capability is improved, a vortex phenomenon is weakened, and the noise is lowered.
Owner:SAIC-GM-WULING AUTOMOBILE CO LTD
an axial fan
The invention discloses an axial fan, comprising a hub and a plurality of blades arranged on the periphery of the hub. Leading edges of the blades are provided with thickened sections, the thickened sections extend from the root of the hub to outer edges of the blades, and extend by a set length from the leading edges of the blades to the rear edges of the blades along an equal-primitive arc; and the blades bend to a suction surface or a pressure surface, so the suction surface or the pressure surface is enabled to form a curved surface. During the movement of the axial fan, the shudder and the eddy current phenomenon of the blades are reduced, the noise produced by the axial fan is decreased, and the overall performance of the axial fan is improved.
Owner:GREE ELECTRIC APPLIANCES INC
A small airflow gyroscope
Owner:BEIJING INFORMATION SCI & TECH UNIV
Air cylinder and compressor
PendingCN109139476AReduce vortex phenomenonSimple designRotary piston pumpsRotary piston liquid enginesEngineering
The invention provides an air cylinder and a compressor, and solves the technical problem that air suction efficiency cannot be further improved due to the fact that design of a U-shaped air suction channel of the air cylinder of the compressor cannot meet four key design factors simultaneously. According to the technical scheme, the air cylinder comprises an air cylinder body, a slide sheet groove formed in the air cylinder body and an air suction port formed in one side of the slide sheet groove, wherein a cross section of the air suction port is of a groove structure, and a groove comprisesa first circular arc section, a second circular arc section and a plurality of extended sections. According to the air cylinder and the compressor, the inner wall of the groove is set into multiple arc sections, the eddy phenomenon near the air suction port can be effectively reduced, air suction resistance caused by eddy is reduced, and compression efficiency of the compressor is improved. Meanwhile, by means of the groove with multi-arc-section inner wall, when the air suction port is designed, setting and adjustment of each key parameter affecting the air suction efficiency of the air suction port are further facilitated, great convenience is brought to design of the air suction port, and workload of the design is reduced.
Owner:ZHUHAI LANDA COMPRESSOR +1
Exhaust valve seat and compressor
ActiveCN113700632AReduce eddy currentReduce local flow resistancePositive displacement pump componentsPumpsExhaust valveNeck parts
The invention discloses an exhaust valve seat and a compressor. The exhaust valve seat comprises a valve seat body, the valve seat body is provided with an exhaust hole, the exhaust hole is sequentially provided with a necking part, a transition part and a flaring part in the exhaust direction, and in the exhaust direction, the cross sectional area of the necking part is decreased progressively, and the cross sectional area of the flaring part is increased progressively. The inner wall of the necking part and the inner wall of the flaring part are respectively connected with the inner wall of the transition part; and the axial height of the necking part is H1, the axial height of the transition part is H2, the axial height of the flaring part is H3, and (H1+H2) / (H1+H2+H3) is larger than or equal to 0.2 and smaller than or equal to 0.8. According to the exhaust valve seat, the gas vortex phenomenon at an inlet and an outlet of an exhaust hole can be reduced, the exhaust resistance is reduced, the power consumption of the compressor is reduced, and the energy efficiency of the compressor is effectively improved.
Owner:GUANGDONG MEIZHI COMPRESSOR
A noise-proof integrated stove
InactiveCN109340856BReduce vortex phenomenonImprove the environmentDomestic stoves or rangesLighting and heating apparatusResonanceEngineering
The invention relates to the technical field of integrated stoves, and aims to provide a noise reduction mechanism for an integrated stove, wherein the noise reduction mechanism for the integrated stove can reduce noise pollution effectively. According to the adopted technical scheme, the noise reduction mechanism for the integrated stove comprises a mounting plate and a plurality of noise reduction units which are arranged on the mounting plate; the mounting plate is matched with a smoke inlet, and a plurality of mounting holes are formed in the mounting plate corresponding to the noise reduction units in number; the noise reduction units are arranged in the mounting holes and comprise columnar shells, wherein the front ends of the shells are closed, and the rear ends of the shells are opened; resonance tubes are arranged in the shells, and resonance cavities are constituted in the resonance tubes; the front ends of the resonance tubes communicate with the rear ends of connecting pipes, and the front ends of the connecting pipes extend to the front end faces of the shells and communicate with the outside; and airflow holes communicating with inner cavities of the shells are formedin the resonance tubes. Airflow noise of the smoke inlet of the integrated stove can be effectively reduced, and the kitchen environment is improved.
Owner:乐亭大晟科技有限公司
Venturi tube flow measuring device and installation method
ActiveCN108593020BReduce total pressure lossEasy to installVolume/mass flow by differential pressureEngineeringLaryngeal tube
The invention discloses a Venturi tube flow measurement device and an installation method. The flow measurement device includes an inlet cylinder section, a conical constriction section, a cylinder throat section and a conical divergence section arranged in sequence. There are positive pressure-taking holes in the radial direction on the top, and negative pressure-taking ports in the radial direction on the cylindrical throat section. The conical constriction section of the Venturi tube, the cylindrical throat section and the conical diffusion section are integrally formed castings. The external pipe diameters of the two ports of the Venturi tube conical contraction section and the conical diffuser section are adapted to the inner diameter of the inlet circular tube section; the profiles of the Venturi tube conical contraction section, the cylindrical throat section and the conical diffuser section are hyperbolic, The two ends of the conical constriction section and the conical divergence section of the Venturi tube are respectively provided with positioning pieces. The Venturi tube measuring device is simple in processing, convenient in installation, low in manufacturing cost, and can meet the needs of engineering measurement.
Owner:江阴市节流装置厂有限公司
Pressure-equalizing noise-eliminating air conditioning unit
InactiveCN104329730AReduce air dust contentEven air flowLighting and heating apparatusNoise suppressionAirflowComputer engineering
The invention provides a pressure-equalizing noise-eliminating air conditioning unit which comprises a shell, an air inlet section, a first filtering section, a volute-free fan section, a second filtering section and an air outlet section, wherein the air inlet section, the first filtering section, the volute-free fan section, the second filtering section and the air outlet section are successively arranged in the shell according to an air feeding direction; air flow conveyed from the air inlet section passes through the first filtering section, the volute-free fan section and the second filtering section in turn and is discharged from the air outlet section. The pressure-equalizing noise-eliminating air conditioning unit provided by the invention can reduce the dust content of air entering into the volute-free fan section, and can effectively protect the volute-free fan section; meanwhile, the air flow is filtered and carded by the first filtering section, so that the air flow entering into the volute-free fan section is uniform, no eddy phenomenon is generated, the noise of the volute-free fan section is effectively reduced, and the running of the volute-free fan section is more stable.
Owner:SUZHOU YIDIANSHEN AIR CONDITIONING EQUIP ENG
Shell and tube heat exchanger
ActiveCN104406431AImprove flow field characteristicsEffective limitStationary tubular conduit assembliesPlate heat exchangerShell and tube heat exchanger
The invention provides a shell and tube heat exchanger. A U-shaped heat exchange tube system arranged in n layers from the inside to the outside is arranged in the heat exchanger, the layers of the U-shaped heat exchange tubes are arranged in parallel, and two ends are fixedly connected with a tube system end tube plate. An anti-collision limit unit is arranged between the layers of the U-shaped heat exchange tubes respectively and comprises two location plates and n+1 separation rods. The two location plates are arranged on the two sides of the U-shaped heat exchange tube system, and the ends are fixedly connected with the tube system end tube plate. Installation grooves of the separation rods are formed in the corresponding positions in the two location plates which are detachably connected with the separation rods, and the separation rods are arranged before and after each layer of the U-shaped heat exchange tubes to separate the adjacent U-shaped heat exchange tubes. The shell and tube heat exchanger has the advantages that good flow field characteristics are provided, and vortexes are reduced; limit is performed effectively, and scratching of the tube walls is prevented; the requirement for assembly size is not high, and the practicality is high; the limit is flexible, cutting and tube flattening processes of tube sections are reduced, the efficiency is improved, the cost is reduced, and the cost performance is high.
Owner:DONGFANG TURBINE CO LTD
Dance room with adjustable temperature and humidity
InactiveCN111271791AReduce vortex phenomenonRegulate humidityMechanical apparatusLighting and heating apparatusEngineeringMechanical engineering
The invention relates to a dance room with adjustable temperature and humidity. The dance room with adjustable temperature and humidity comprises a room main body, wherein the room main body comprisesside plates sand a heat-conducting plate connected to the lower ends of the side plates; the side plates form a columnar structure in a surrounding manner; a cavity is formed inside the heat-conducting plate; a heat exchange device is arranged in the cavity and is used for adjusting the temperature and humidity in the main body; the heat exchange device passes through the side plates and extendsto the exterior of the main body; the interior of the main body is provided with a plurality of hygrothermographs in the height direction, which are in parallel connection and are electrically connected; the hygrothermographs are electrically connected to a controller; and the controller is electrically connected to a humidifier which is located inside the main body and is close to the upper end.By arranging the columnar main body, the purpose of equalizing the indoor temperature and humidity is achieved, the vortex phenomenon of the airflow is reduced, and the purpose of certain energy conservation is realized; by arranging the heat exchange device, the purpose of adjusting the temperature in the main body is achieved; by arranging the automatic humidifier, the purpose of adjusting the humidity in the main body timely is achieved; and the dance room with the adjustable temperature and humidity has relatively strong functionality and be widely used in the technical field of dance equipment.
Owner:JINING UNIV
Mixed-flow fan blades, air duct structure and air conditioner indoor unit
PendingCN112303005AEasy to rectifyImprove centrifugal effectDucting arrangementsPump componentsMixed flowStructural engineering
The invention provides mixed-flow fan blades, an air duct structure and an air conditioner indoor unit. The mixed-flow fan blades comprises a hub, a plurality of mixed flow blades and flow adjusting blades, wherein the flow mixing blades are arranged on the outer circumferential surface of the hub in the circumferential direction of the hub, a flow guide gap is formed between every two adjacent mixed flow blades, and each flow guide gap is provided with a circumferential air outlet, so that at least part of airflow entering the flow guide gaps flows out of the circumferential air outlets in the radial direction of the hub under the centrifugal action of the mixed flow blades, the flow adjusting blades are arranged on the outer peripheral surface of the hub, the flow adjusting blades and the mixed flow blades are arranged in in an alternative mode, the length of the flow adjusting blades in the axis extending direction of the hub is smaller than that of the mixed flow blades, and one ends of the flow adjusting blades extend to the end part of the hub so that the airflow at the mixed flow blades can be adjusted through the flow adjusting blades. By means of the technical solution ofthe mixed-flow fan blades, the air duct structure and the air conditioner indoor unit, the technical problem that in the prior art, the vortex phenomenon occurs among the mixed flow blades of the mixed-flow fan blades can be solved.
Owner:GREE ELECTRIC APPLIANCES INC
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