44results about How to "Improve temperature field uniformity" patented technology

The invention relates to a low-cost quick solidifying method for a composite material. A middle-frequency electromagnetic induction coil directly acts on a metal mould to self heat and solidify to form a composite material, middle frequency heating speed is high, the uniformity of a temperature field is good, the control is exact, the temperature overshoot is small, the production efficiency is greatly improved, and the product quality is ensured; furthermore, by utilizing middle-frequency electromagnetic induction heating, only the self metal mould is heated, a non-metal auxiliary material for forming the composite material is not heated, and the ambient temperature is very low after a special coating is utilized in a forming process, so that a very expensive high-temperature-resistance auxiliary material is not necessary to use when a high-temperature-resistance composite material such as bismaleimide and polyimide is formed; therefore, the manufacturing cost is saved and the energy consumption is low.

The invention discloses a heat exchanger using a microporous hydrophobic membrane for strengthening heat exchange. The shell of the heat exchanger is made of metal and fluid in the internal pipeline in the heat exchanger is divided by the microporous hydrophobic membrane into two parts flowing in opposite directions; fluid on a hot side of the heat exchanger contacts a heat exchange surface; the fluid on the hot side is heated by an external heat current, the temperature of the fluid on the hot side rises to generate a vapor pressure difference between two sides of the membrane, a working medium on high vapor pressure side evaporates and penetrates the membrane to flow to a low pressure side to achieve an effect of phase change heat transfer.

The invention relates to a wide cone angle atomizing oil throwing disc structure, and relates to the technical field of turbine engines. According to the wide cone angle atomizing oil throwing disc structure, the design of spraying holes in the nozzles and the design of a cavity formed between an oil throwing disc body and the nozzles are adopted so that the good atomization effect can be obtainedat the lower rotating speed of the engine while the small turbine engine has the characteristic of being compact in structure, meanwhile, certain taper angle distribution can be guaranteed, the uniformity of the temperature field in a flame tube is improved, and the oil supply pressure is reduced; according to the wide cone angle atomizing oil throwing disc structure, the wide airspace work of the engine can be supported, namely, under different oil supply flows, atomized particle size distribution can be ensured by the oil throwing disc so that efficiently and stably burning in a combustionchamber can be ensured.

The invention discloses an intelligent pulse combustion system. The intelligent pulse combustion system comprises a gas pipeline, a combustion assisting air pipeline, a combustor and a control system; the gas pipeline introduces gas into the combustor; the combustion assisting air pipeline introduces air into the combustor; nd the control system controls coordinated work of the gas pipeline, the combustion assisting air pipeline and the combustor to realize intelligent pulse combustion control. The intelligent pulse combustion system realizes intelligent pulse combustion control through controlling the combustion state switching and the combustion lasting time of the combustor by the control system according to a deviated value between a detected industrial furnace actual temperature and a preset temperature. The intelligent pulse combustion system can realize precise control of a combustion atmosphere, improves the heat transfer efficiency, largely reduces the energy consumption, needs no online adjustment, can increase the burner load adjusting ratio, is simple and reliable, is low in manufacturing cost, and can reduce generation of NOx.

A high shimming air chamber heating structure is used for an atomic spin inertia measurement system and comprises a supporting base, a heat preservation device and a heating device. The heat preservation device wraps the heating device and then is fixed into the supporting base. The heating device comprises an inner heat conduction device and a high shimming heating film wrapping the whole side surface of the inner heat conduction device; the inner heat conduction device comprises an air chamber seat and an air chamber fixing part which are made of high-thermal-conductivity materials and are in butt joint with each other, the alkali metal air chamber is clamped and coated through mutual opposite pressing of the air chamber seat and the air chamber fixing part, the heat conduction area of the alkali metal air chamber is increased, and the local temperature of the alkali metal air chamber is prevented from being too high. The high shimming heating film directly coats the side surfaces ofthe air chamber seat and the air chamber fixing part which are made of high-thermal-conductivity materials; and the high shimming heating film is a high shimming heating film of which the temperaturefluctuation amplitude is kept between 5mK and 8mK in normal work, so that the temperature fluctuation in the alkali metal gas chamber is kept between 0.5 K and 1.5 K when the atomic spin inertia measurement system works normally.

The invention provides a high-reliability multiblade cold/hot air flow mixed spoiler which comprises an outer ring and a spoiling component, wherein the outer ring can be connected with the inner wall of the pipeline through screws, and the spoiling component is arranged on the inner wall of the outer ring; the spoiling component comprises a plurality of flat blades and a spacing ring, and the blades are uniformly distributed in the circumferential direction; one end of each blade is welded on the inner wall of the outer ring and forms a certain included angle with the approach flow direction, and the other end of each blade is a free end and extends towards the central axis of the outer ring to form a center hole; the free end of each blade is provided with a spacing hole of which the cross-sectional shape is greater than that of the spacing ring; and the spacing ring orderly penetrates through the spacing hole of each blade. The invention overcomes the defect that the air flow temperature field uniformity of the existing high-flow high-temperature simulated ground equipment can not satisfy the requirements, provides a static mixed mode of multiblade spoiling and variable cross-section pipelines, and has the advantages of high flow, high temperature difference and high reliability.

The invention provides a silicon wafer etching bath liquid isolation type uniform heating device. The device comprises a heat insulation base, electric heating coils, a stainless steel plate, corrosion-resistant adhesive layers and an etching bath body, wherein grooves for the electric heating coils are distributed on the heat insulation base; the depth of the grooves is more than the diameter of the electric heating coils; the electric heating coils are distributed in the grooves; the stainless steel plate is arranged above the heat insulation base; the etching bath body is connected with the stainless steel plate in an adhesive manner by the corrosion-resistant adhesive layers; and the radiating area of the stainless steel plate is equivalent to the bottom of the etching bath. The device has the following beneficial effects: a plane type uniform heating device for the stainless steel plate is arranged at the bottom of the etching bath, the electric heating coils are arranged below the stainless steel plate, the electric heating coils firstly heat the whole stainless steel plate and then the stainless steel plate uniformly transfers the heat to the corrosive liquid in the etching bath, thus not only improving the speed of temperature rise of the liquid in the etching bath but also improving the uniformity of the temperature field.

The embodiment of the invention discloses an adjustable ceramic roller kiln nozzle layout structure. The adjustable ceramic roller kiln nozzle layout structure comprises a kiln body, a roller way arranged in the kiln body, upper nozzles and lower nozzles, wherein the upper nozzles and the lower nozzles are arranged in the kiln body and symmetrically arranged on the left side and the right side ofa kiln body burning zone; the upper nozzles are positioned above the roller way; the lower nozzles are positioned below the roller way; and the upper nozzles and the lower nozzles are in one-to-one correspondence and are arranged symmetrically up and down. According to the adjustable ceramic roller kiln nozzle layout structure, the layout mode of original nozzles is changed, so that gas turbulenceinside a kiln is enhanced, gas flowing is accelerated, the temperature difference is reduced, and therefore the uniformity of a temperature field is improved, the heat transfer rate is increased, andthe quality of a ceramic product is improved.

The invention discloses a head shell structure of a high-pressure pre-combustion chamber, which includes a top cover, a second bottom, a fuel collector, a body and a bottom. The head shell of the pre-combustion chamber adopts a spherical structure to improve the body The local working environment of the head improves the overall pressure bearing capacity and structural reliability of the head of the pre-combustion chamber, which is helpful for the structural layout of the fuel collector; The radial through holes are uniformly arranged on the upper part of the fuel tank, so that a part of the fuel directly enters the combustion chamber through the radial through holes, and is mixed with high-temperature gas to improve the uniformity of the temperature field at the outlet of the combustion chamber, and at the same time reduce the spoiler ring, grille and body turning And other structures, effectively reducing the weight of the pre-combustion chamber.

The invention discloses a biomass gas steam generator. The generator comprises a pre-combustion chamber, a mixing chamber, a lean combustion chamber, a smoke tube, a smoke returning chamber, an axialblade combustor and an ejector; lithium bromide dilute solution or water is introduced through an introduction opening, the lithium bromide dilute solution or water is heated through the lean combustion chamber, a second return smoke pipe, a third return smoke pipe, a lower middle smoke returning chamber, an upper middle smoke returning chamber and a pipe plate to form saturated steam; lithium bromide concentrated solution is introduced into a low-pressure generator from a outlet opening through a liquid bag; the saturated steam is led out from the outlet opening, secondary air is introduced from a secondary air inlet opening, hot air formed by heating is mixed with the weak reducing flue gas at an outlet of the pre-combustion chamber in the mixing chamber through the ejector to form high-temperature high-speed lean air, then the high-temperature high-speed lean air is sprayed into the lean combustion chamber, and is mixed with secondary biomass gas to realize lean combustion. The biomass gas steam generator has the advantages of rich combustion and lean combustion, the energy consumption of a fan is low, the radiant heat flux is high, the temperature field uniformity is good, thecombustion is stable, the Nox generation amount is low, the greenhouse gas emission is low, and the structure is compact.

The invention provides a liquid-helium-free animal imaging superconducting magnet. The liquid-helium-free animal imaging superconducting magnet comprises a superconducting magnet, a liquid-helium-free low-temperature system and a pull rod. The superconducting magnet comprises a main magnet, a shielding magnet and a 4K container, the main coil is wound in an external wire slot of the main framework to form the main magnet, the shielding coil is wound in an external wire slot of the shielding framework to form the shielding magnet, and the 4K container contains the superconducting magnet; the liquid-helium-free low-temperature system comprises a refrigerating machine, a refrigerating machine primary cold head, a cold shield, a refrigerating machine secondary cold head, a cold conduction ring, a cold conduction belt and a Dewar container, the refrigerating machine primary cold head is directly connected with the cold shield to achieve primary refrigeration, the refrigerating machine secondary cold head is directly connected with the cold conduction ring, and the cold conduction ring is connected with the shielding coil and the main coil through the cold conduction belt. Secondary refrigeration of the superconducting magnet is achieved, and the Dewar container is used for forming a low-temperature system vacuum environment; the superconducting magnet and the cold shield are suspended and fixed in the Dewar container through a pull rod to reduce system contact heat leakage; the diameter of the inner hole of the superconducting magnet is suitable for small animal imaging.

The invention relates to a disc-shaped radial micro-channel radiator. The radiator comprises an upper cover plate, a micro-channel module and a confluence plate. The upper cover plate is connected with the inlet pipeline, and the confluence plate is connected with an outlet pipeline; the upper cover plate and the confluence plate are connected, a cylindrical space is formed in the upper cover plate and the confluence plate, and the micro-channel module is arranged in the cylindrical space; and the micro-channel module structurally comprises a circular substrate, a through hole is formed in the middle of the substrate, a plurality of rib plates are formed on the upper surface of the substrate and radially extend from the edge of the through hole to the outer ring of the substrate, a micro-groove with a gradually increased flow section is formed between every two adjacent rib plates, and the upper surface of the substrate is attached to the upper cover plate, so an inflow channel is formed between the microgroove and the upper cover plate. The micro-channel radiator is used for solving the problem that an existing micro-channel radiator is not matched with annular and rotating parts, and the problem that the temperature is not uniform due to the fact that flow in the micro-channels is not uniform in the circumferential direction is solved through the outlet and the inlet which are formed in the radiator in the axis direction and the radial micro-channels.

The invention provides a rack structure and CT equipment. The rack structure comprises a shell and a rack assembly. The rack assembly is arranged in the shell. The rack assembly comprises a fixed rackand a rotary rack. The fixed rack is provided with a first air cavity and a second air cavity which are formed by separating the shell in the axial direction. The rotating rack is rotatably mounted on the fixed rack and provided with a vent hole, and the vent hole communicates with the first air cavity and the second air cavity in the two sides of the rotating rack. The first air cavity, the venthole and the second air cavity are arranged in the axial direction, so that airflow enters the rotating rack in the axial direction and cools the electrical apparatus elements on the rotating rack, the airflow can effectively cool the electrical apparatus elements, it is guaranteed that the temperature field in the fixed rack is high in uniformity, the performance of the detector is prevented from being affected, and the imaging effect of images is guaranteed; and meanwhile, the overall height of the CT equipment can be reduced.