31results about How to "Increase jet intensity" patented technology

The invention discloses a reed type hydrodynamic ultrasonic gas-liquid-solid multi-phase mixer. The reed type hydrodynamic ultrasonic gas-liquid-solid multi-phase mixer comprises an upper cover, a lower bottom and a plurality of reeds. The upper cover and the lower bottom are detachably combined in a sealed mode to form a cavity. The multiple reeds are horizontally and fixedly arranged on the inner wall of the upper cover at intervals. The upper cover comprises a gas introduction pipe, a solid supporting frame and first nozzle passages. The lower bottom comprises a liquid introduction pipe and second nozzle passages. The tip end of any reed is opposite to the liquid outlet end of one of the second nozzle passages at the distance of 2-8 mm. Each second nozzle passage is of a narrow-seam structure 1-3 mm wide. The diameter of each first nozzle passage is 2-4 mm, and the first nozzle passages all enable gas to be sprayed towards one reed. Through introduction of the surrounding type reed structure and solid-phase materials, the atomization effect of the mixer is improved, the gas amount needed in the atomization process is lowered, and the reed type hydrodynamic ultrasonic gas-liquid-solid multi-phase mixer has the beneficial effects of being simple in structure, high in maneuverability, safe and reliable.

The invention discloses a pre-combustion chamber ignition structure, a pre-combustion chamber ignition system and a working method thereof. The pre-combustion chamber ignition structure comprises a central electrode extending into a pre-combustion chamber; a grounding electrode is disposed to an end portion of the central electrode; and a spark plug clearance located inside the pre-combustion chamber is formed between the central electrode and the grounding electrode. According to the pre-combustion chamber ignition structure, pre-combustion chamber ignition system and working method thereof of the invention, more mixed gases participate in combustion in the pre-combustion chamber; jet flow components entering a main combustion chamber through the connection passage of the pre-combustion chamber after the spark plug performs ignition can be significantly improved; energy carried by the jet flow of the pre-combustion chamber can be increased; a distributed ignition coverage area formedafter the jet flow of the pre-combustion chamber enters the main combustion chamber can be increased; the ignition energy of the ignition system of the pre-combustion chamber can be significantly improved; and the reliable ignition of a lean mixture in the main combustion chamber can be ensured; the propagation distance of flames in the main combustion chamber can be shortened; the lasting duration of combustion in the main combustion chamber can be shortened; combustion heat efficiency can be improved; the cyclical fluctuation ratio of the operation of an engine can be reduced; the operational stability of the engine can be significantly improved; and HC and CO emissions can be reduced.

The invention relates to a handheld diesel oil flame device for pest killing and weeding. The handheld diesel oil flame device comprises a pressure tank, a handheld rod and a flame eruption device. The pressure tank is connected with the handheld rod through a rubber pipe. The handheld rod is a hollow aluminum alloy pipe. The flame eruption device is fixed to the other end of the handheld rod. The flame eruption device is provided with a steel pipe, the steel pipe is wound around a center shaft disc to form a center channel, the outlet end of the steel pipe extends by a certain distance and then is bent to be aligned to the channel, and the inlet end of the steel pipe is communicated with the other end of the handheld rod. The handheld diesel oil flame device is provided with the flame eruption device, diesel oil can be gasified, and strong strip-shaped flames can be erupted. The pressure tank and an inflator are integrated, the structure of the pressure tank is simplified, and portability is improved. Through the telescopic handheld rod, pest killing and weeding can be conveniently carried out on orchards and vegetable plots with complex terrain. The diesel oil is adopted as fuel, cost is lowered, and safety performance is improved.

A dish washer has a two-layer dish shelf, two water channels, a pulse device for pulse washing, a control microprocessor, and a water dividing plate controlled by control microprocessor to turn off one of two water channels. Its washing method features that said two water channels are alternatively turned off for increasing the spray force of water steam and in turn the clean level.

The invention discloses a dual-drive multi-nozzle automatic pipe network fire extinguishing device. The dual-drive multi-nozzle automatic pipe network fire extinguishing device comprises two extinguishing agent storage rooms, a dual-drive device, a pipe network and two boosting automatic start-up devices, wherein the two extinguishing agent storage rooms are provided with solid extinguishing agents respectively; one end of each of the two extinguishing agent storage rooms is provided with an extinguishing agent output end; the dual-drive device comprises two drive units and a starting wire which is used for initiating the two drive units; the pipe network is U-shaped and is provided with two extinguishing agent inlets and a plurality of extinguishing agent nozzles; the starting wire is connected and cooperated with the two drive units respectively; the two drive units are independently connected with one extinguishing agent storage room respectively; and the extinguishing agent inlets of the pipe network are connected with the extinguishing agent output ends of the two extinguishing agent storage rooms through the boosting automatic start-up devices respectively. The dual-drive multi-nozzle automatic pipe network fire extinguishing device is benefit to extending the spraying time of the extinguishing agents and realizing multi-aspect three-dimensional protection, fire hazard area spreading is avoided, and secondary reigniting of an inflammation point is effectively prevented; and the extinguishing agent spraying strength is high, and the extinguishing effect is better.

The invention discloses a LED heat dissipation device of a Venturi effect and modification synthetic ejector. The LED heat dissipation device comprises a housing, a synthetic jet actuator, fins and anLED base plate. The LED heat dissipation device is characterized by further comprising a Venturi tube, wherein the fins, the Venturi tube and the synthetic jet actuator are fixedly arranged inside acavity defined by the LED base plate and the housing, so that the position of the Venturi tube and the positions of the fins are relatively fixed; the bottom of the synthetic jet actuator is equippedwith a connecting cover; the connecting cover is connected with the Venturi tube; the outlet of the Venturi tube is connected with the fins; and the housing is fixed with the LED base plate through aslide slot. The invention designs a double-film three-cavity synthetic jet actuator; and the outlet of the synthetic jet actuator is additionally equipped with the Venturi tube, so that flow at the outlet is finally increased. By changing a fluid state and increasing gas inlet amount, heat dissipation efficiency is improved, a junction temperature of the LED is reduced, and the service life of theLED is prolonged.

The invention relates to a preparation method and a preparation device of high-depth-diameter ratio micropores. The preparation method and the preparation device are used for high-depth-diameter ratio micropores. The preparation method is used for preparing the high-depth-diameter ratio micropores in a dual-pulse combination manner; the laser source comprises two laser combinations different in pulse width; a digital signal time delay generator is used for controlling the two pulse combinations for the time of a sample; the laser pulses of two laser devices are combined and focused on the sample by use of an optical component to perform laser etching on the sample directly; the preparation device comprises a femtosecond laser device, a nanosecond laser device, a digital signal time delay generator, a half-wave plate, an optical polarizer, a beam splitter, a total reflector, a white light source, a charge coupling element, a three-dimensional mobile platform and a computer. The preparation method is capable of directly breaking through the maximum micropore high-depth-diameter ratio limit that can be available by use of single pulse and well solving the technical problem of low depth-diameter ratio in current micropore preparation.

The invention discloses an injection type lubricating structure. The structure comprises an injection oil way arranged in a box body, the injection oil way is provided with an oil injection opening, the oil injection direction of the oil injection opening right faces a piston cavity of the box body, engine oil injected out of the oil injection opening can reach the top face of the piston cavity, the top of the piston cavity can be effectively cooled, motion components in a cylinder body are effectively lubricated, normal running of a steam cylinder is ensured, excessive losses of the power of an engine are avoided, the structure is simple, and machining is convenient; meanwhile, a shaft neck which rotates at a high speed enables the engine oil injection strength to be larger, the sputtering and lubricating range of surrounding components is widened and the sputtering and lubricating strength of the surrounding components is improved while it is ensured that the cooling flow is sufficient, meanwhile, the injection engine oil flowing out at a high speed is beneficial to inner circle oil distribution of a shaft neck supporting base, and it is ensured that the lubricating effect is good.

The present invention relates to a fire extinguishing composition containing a transition metal compound, comprising a salt of an organic acid of first period elements in a subgroup and the group VIII; and using a pyrotechnic agent as a heat source and a power source, reacting through heat emitted by igniting the pyrotechnic agent to burn and outputting a fire extinguishing material. In the present invention, a transition metal compound is selected as a primary ingredient, then an amine and / or organic amine salt is added to assist in fire extinguishing, a fire extinguishing aerosol is formed by using the fire extinguishing material generated by heating and decomposing the transition metal compound, and meanwhile the amine and / or organic amine salt is heated and decomposed to generate a great quantity of gas, thereby increasing the concentration and the air pressure strength of the fire extinguishing aerosol, improving the injection strength of the fire extinguishing material, and greatly improving the fire extinguishing performance of the fire extinguishing composition.

The invention discloses a thin film sealing type piezoelectric driving trace jet lubrication device and relates to the technical field of space lubrication and piezoelectric driven trace jet lubrication. According to the thin film sealing type piezoelectric driving trace jet lubrication device, the problem that bearing machinery of a precision part of an existing spacecraft loses efficacy is solved. The thin film sealing type piezoelectric driven trace jet lubrication device comprises a locking nut, a trace jet rear cover, an oil supply core shaft, a trace jet front cover and a piezoelectric vibrator. An oil supply cavity is formed in the middle of the rear end of the oil supply core shaft in the axial direction. A plurality of oil supply channels are symmetrically arranged at the front end of the oil supply cavity in the radial direction and communicate with the oil supply cavity. The trace jet rear cover is arranged at the rear end of the trace jet front cover. The piezoelectric vibrator is arranged between the trace jet rear cover and the trace jet front cover. A plurality of oil jetting openings are uniformly formed in the outer side of the front end face of the trace jet front cover in the circumferential direction. An oil jetting cavity communicates with the oil jetting openings. A plurality of oil jetting channels are uniformly formed inside the trace jet front cover in the circumferential direction. One ends of the oil jetting channels are connected with the oil jetting cavity, and the other ends of the oil jetting channels are connected with oil supply channels. The thin film sealing type piezoelectric driven trace jet lubrication device is used for piezoelectric driving trace jet lubrication.

The invention discloses a pressure controlled low temperature storage tank with a jetting device. The pressure controlled low temperature storage tank consists of a tank body, a low temperature circulating pump, a liquid throttle valve, a heat exchanger, a fluid ejector and an exhaust cooling system. The heat exchanger comprises a first heat exchange path and a second heat exchange path in countercurrent arrangement, the tank body, the low temperature circulating pump, the first heat exchange path and the fluid ejector are communicated with each other in order to form a large stream fluid circulation loop, the tank body, and the liquid throttle valve, the second heat exchange path and the exhaust cooling system are communicated with each other in order to form a throttling refrigeration route. The fluid ejector is arranged in the tank body, and the fluid ejector is provided with jet orifices at least in the upper space inside the tank body. The exhaust cooling system includes an ejector, an orthohydrogen-parahydrogen conversion device and an exhaust cooling coil. The pressure controlled low temperature storage tank provided by the invention has the advantages of simple structure, large jet intensity, and good heat exchange efficiency, can effectively eliminate heat leakage of the tank body, and realize good control of the tank pressure, and has good application value and popularization prospect for long-term storage of cryogenic propellants.

The invention discloses a reed type hydrodynamic ultrasonic gas-liquid-solid multi-phase mixer. The reed type hydrodynamic ultrasonic gas-liquid-solid multi-phase mixer comprises an upper cover, a lower bottom and a plurality of reeds. The upper cover and the lower bottom are detachably combined in a sealed mode to form a cavity. The multiple reeds are horizontally and fixedly arranged on the inner wall of the upper cover at intervals. The upper cover comprises a gas introduction pipe, a solid supporting frame and first nozzle passages. The lower bottom comprises a liquid introduction pipe and second nozzle passages. The tip end of any reed is opposite to the liquid outlet end of one of the second nozzle passages at the distance of 2-8 mm. Each second nozzle passage is of a narrow-seam structure 1-3 mm wide. The diameter of each first nozzle passage is 2-4 mm, and the first nozzle passages all enable gas to be sprayed towards one reed. Through introduction of the surrounding type reed structure and solid-phase materials, the atomization effect of the mixer is improved, the gas amount needed in the atomization process is lowered, and the reed type hydrodynamic ultrasonic gas-liquid-solid multi-phase mixer has the beneficial effects of being simple in structure, high in maneuverability, safe and reliable.

The present invention relates to a fire extinguishing composition containing saccharide and a saccharide derivative, comprising a saccharide derivative, a saccharide material and an auxiliary fire extinguishing agent, whose mass percentages are respectively: saccharide derivative 30%-60%, saccharide material 10%-40%, and auxiliary fire extinguishing agent 10%-30%. The fire extinguishing composition uses a pyrotechnic agent as a heat source and a power source, is heated and decomposed or reacts by using the heat of burning of the pyrotechnic agent, to generate a fire extinguishing material to be sprayed together with the fireworks agent, thereby achieving the fire extinguishing purpose. The fire extinguishing composition of the present invention uses a saccharide derivative and a saccharide material as primary ingredients, uses a pyrotechnic agent as a heat source and a power source, and is easily decomposed after being heated to generate non-toxic and harmless gas. The environment is not polluted after the ejection, the effective utilization rate of components is high, and the material obtained through decomposition can also extinguish fire, so as to generate a synergistic action on the pyrotechnic agent, thereby improving the fire extinguishing performance of the whole fire extinguishing composition.

A long-distance energy-saving fine water sprayer comprises a base body. The base body is a hollow cylinder, a plug is arranged in the middle of the cavity of the base body, one end of the base plate is conical and provided with an inner thread, an annular rib is arranged around the plug and clamped in the groove correspondingly arranged in the cavity of the base body, the center of the rib is provided with another groove, and wear-resistant balls are arranged in the groove. One end face of the plug is provided with a plurality of inclined reducing through holes, 3-4mm of slim holes are arranged in front of 1 / 3 of length of the reducing through holes, and coarse holes with the diameter 3-5 times larger than the slim holes are arranged on the 2 / 3 length of the reducing through holes. Spiral guide columns are arranged in the holes, hollow plugs are arranged at the tail ends of the coarse holes, the outer wall of the base body is provided with through holes in a circle, and the through holes are arranged in the front side of the slim holes of the reducing through holes. The long-distance energy-saving fine water sprayer is simple in structure, long in spraying distance and applicable to technical application.

The invention discloses a low-temperature propellant storage tank with a pressure control device. The low-temperature propellant storage tank comprises a low-temperature propellant storage tank body,a low-temperature circulation pump, a throttling valve, an expansion machine, a double-pipe heat exchanger, an exhaust cooling coil and an exhaust valve. In order to improve the heat exchange efficiency of the heat exchanger, the reverse-flow double-pipe heat exchanger is adopted, and more cooling capacity can be generated. Meanwhile, fluid passing through the throttling valve absorbs heat and becomes saturated gas or superheated gas which is expanded and cooled through the expansion machine after being discharged out of the tank body, the low-temperature gas forms a cold shield through the cooling coil wound in an insulation layer outside the tank body, external leakage is reduced to the greatest extent, and the exhaust cooling capacity is fully used. The low-temperature propellant storage tank is simple in structure and high in heat exchange efficiency, the cooling capacity is fully used, the tank body pressure is effectively controlled, and effective guarantee is provided for long-term storage of a low-temperature propellant and the tank body pressure.

A plasma synthetic jet generator with controllable cavity temperature and its application. The nozzle includes: a heat conduction support structure, a heat pipe, a cavity, electrodes and a DC high-voltage pulse power supply; wherein the electrodes include an anode, a cathode and an excitation electrode; The cavity, the electrode and the DC high-voltage pulse power supply constitute a plasma synthetic jet generator; the heat management component includes the heat-conducting support structure and heat pipes; the DC high-voltage pulse power supply and the electrode are connected through wires ; The electrode forms a high-frequency arc under the excitation of the DC high-voltage pulse power supply. In one excitation cycle, the arc heats the gas in the cavity, and sprays it into the main flow through the oblique hole in the cavity, and the high-temperature gas is ejected Afterwards, the density in the cavity decreases and the temperature rises, and the mainstream gas is sucked into the cavity through the oblique hole of the cavity to form a working cycle; the heat management component conducts the high temperature of the cavity to the cold end of the heat pipe, which can The temperature in the cavity is lowered, thereby increasing the density in the cavity. The invention greatly improves the momentum of jet flow ejected from the plasma synthetic jet flow generator.