8results about How to "Increase jet velocity" patented technology

The invention relates to the technical field of gas turbines, and particularly discloses a combustion chamber axial staged combustion lobe nozzle which comprises a lobe nozzle body, and the lobe nozzle body comprises a fuel air inlet channel, an air inlet channel, a mixing channel, a lobe structure and a mounting flange. An air inlet channel is formed in the top of the lobe nozzle, a fuel inlet channel is connected to the side face of the lobe nozzle, a mixing channel is formed in the lobe nozzle, a lobe structure is arranged in the mixing channel, and the lobe structure is used for forming a vortex system beneficial to improving mixing of air and fuel. According to the axial grading nozzle, the mixing performance of fuel and air can be improved, the nozzle outlet flame lifting and wall face cooling effects are improved, the operation load of a combustion chamber is adjusted, and therefore the effects of reducing emission of pollutants in the combustion chamber, improving the safety and reliability of the axial grading nozzle and widening the thermal load adjusting range are achieved.

The application discloses a kind of gas and air mixing device and mixing method combined with injection, gas flow passage is provided in the mixing device, including gas nozzle and injection structure in sequence according to the direction of gas flow passage, the injection structure is used to carry out partial premixing with gas and be injected air, including in sequence communication suction chamber, mixing section, diffuser section, outlet section, the gas nozzle is communicated with suction chamber, outlet section is provided with swirl device for generating swirl.The application utilizes the momentum of gas jet to inject atmospheric air, carries out partial premixing in advance in injection structure, realizes the sufficient premixing of gas and be injected air before being ejected, mixing distance is short, has the effect of helping to reduce nitrogen oxides emissions generated in industrial combustion process, conforms to the development trend of environmental protection.

The utility model discloses a dental needle structure which comprises a needle tube, the needle tube is arranged in a hollow mode to form a liquid outlet flow channel, one end of the needle tube is used for being matched with an external liquid supply component, the other end of the needle tube is configured to be a free end portion, and liquid outlet side holes communicated with the liquid outlet flow channel are formed in one side and / or two sides of the free end portion. And the injection in the liquid outlet flow channel is sprayed out from the liquid outlet side hole. According to the dental needle capable of discharging liquid from the side, compared with the structural design that water is discharged from a straight hole in the end portion, the side liquid discharging structure cannot cause liquid to block the hole position, the liquid discharging side hole is arranged to be provided with a liquid guiding inclined face expanding outwards to guide the liquid to be sprayed forwards, the liquid spraying flow speed is increased, the liquid discharging hole is prevented from being blocked, and practicability is high.

This invention discloses a jet microchannel heat sink, comprising a shell, which is divided into a lower microchannel layer and an upper jet generating layer by a layered plate. Several pairs of first ribs are spaced apart in each microchannel to enhance the disturbance of the fluid on the wall and near the jet orifice. A pair of second ribs is also provided between adjacent first ribs to disturb the fluid between adjacent jet orifices, resulting in a higher fluid velocity near the second ribs and helping to reduce the temperature in the middle region between adjacent jet orifices. The jet generating layer also includes several jet dispersing ribs to disturb the fluid flowing in through the jet inlet, solving the problem of uneven jet distribution. Furthermore, the structure of this invention can incorporate crossflow, and by improving the jet orifice diameter distribution, the fluid in the latter half of the microchannel still has a high velocity after the crossflow mixes with the jet, carrying away more heat and making the temperature distribution of the microchannel more uniform.

The utility model discloses a sleeve type air jet heat exchanger for recovering heat of high-temperature flue gas of an aluminum melting furnace, which comprises a cold air box, a hot air box, a heat exchange box and a heat exchange tube, the cold air box, the hot air box and the heat exchange box are formed by separating a box body through two transverse partition plates, the upper partition plate and the lower partition plate are provided with mutually corresponding round holes, and the heat exchange tube is arranged in the heat exchange box. The upper end of an inner pipe is fixed in a round hole formed in the upper partition plate, and the lower end of the inner pipe penetrates through the hot air box, extends into the heat exchange box and is sealed; the upper end of the outer sleeve is fixed in a round hole formed in the lower partition plate, the lower end of the outer sleeve extends into the heat exchange box and is sealed, the inner pipe extends into the outer sleeve, and the inner pipe is provided with a plurality of rows of small holes in the pipe wall of the outer sleeve. The sleeve type air jet heat exchanger for recovering high-temperature flue gas heat of the aluminum melting furnace can solve the corrosion influence of high-temperature flue gas on equipment, improves the heat exchange efficiency of the heat exchanger, prolongs the service life of the heat exchanger, and reduces the maintenance difficulty and the maintenance cost.

The invention discloses a self-adaptive liquid pipeline silencing system and method based on jet flow rectification silencing, and the system comprises a silencer housing, at least one jet flow disc disposed in the silencer housing, a flow meter disposed in a pipeline behind a pump, and a silencer controller which is in communication connection with the pump and the flow meter. The pressurizing and liquid returning assembly is arranged on the outlet side of the silencer shell, communicated with the jet flow disc and used for pressurizing and returning liquid at the outlet of the silencer and spraying the liquid out of the jet flow disc; the liquid part at the outlet of the silencer is repeatedly sucked out through the pressurization liquid return assembly and sprayed out through the jet flow nozzles after being pressurized, so that large vortexes generated at the upstream of the pump are scattered and broken into small vortexes, the small vortexes are finally rectified into laminar flow through the multiple stages of jet flow discs, and liquid pressure pulsation is reduced. The silencer controller is used for collecting rotating speed signals and flow signals of the pump and controlling the jet speed and flow of the jet disc, self-adaptive adjustment of the silencing effect of the liquid pipeline is achieved, and the silencing effect is guaranteed.

This invention discloses a radial flame stabilizer with airflow-assisted jet, comprising an outer wall and an inner wall. Both the outer and inner wall surfaces have V-shaped cross-sections, including a pointed tip and two tail ends. The two corresponding tail ends of the outer and inner wall surfaces are connected by a flow-rectifying wall. An air-guiding groove is provided at the pointed tip of the outer wall, and several injection holes are provided near the tail ends. The air-guiding groove, the interlayer between the outer and inner wall surfaces, and the injection holes form an airflow channel. A fuel injection extension pipe is provided near the tail ends of the inner wall, extending from the inner wall towards the injection holes. The fuel injection extension pipe guides the fuel injection from the injection holes. By introducing a portion of the incoming flow through the air-guiding groove at the stabilizer head, and utilizing the method of coaxial injection of the introduced incoming gas and fuel, the problem of shallow fuel jet depth and difficult evaporation under high-speed, large-flow conditions is improved, resulting in better fuel evaporation and mixing performance compared to conventional radial flame stabilizers.

The utility model discloses a pneumatic needleless injection device, and belongs to the field of medical equipment. A pneumatic needleless injection device comprises a cylinder body provided with a cavity, and a front end cover and a rear end cover are arranged at the two ends of the cylinder body respectively; the front end cover extends outwards to form a liquid suction channel; the first piston is arranged in the cavity in a sliding mode and located between the front end cover and the rear end cover. The air pressure storage mechanism is arranged in a cavity between the first piston and the rear end cover; the plunger is located in the liquid suction channel, and one end of the plunger is fixedly connected with the first piston; and the nozzle is arranged at an outlet of the liquid suction channel. The pneumatic needleless injection device has the beneficial effects of being long in service life and high in flexibility.