89results about How to "Improve temperature field" patented technology

The invention discloses an air fog cooling system and an air fog cooling method for a centrifugal casting cold mold. The cooling system comprises a water collecting pipe, an air header and a plurality of groups of air fog cooling nozzles, wherein the water collecting pipe and the air header are arranged parallel to the axial line of a centrifugal machine, each group of air fog cooling nozzles are provided with a water inlet connected with the water collecting pipe, an air intake connected with the air header and an air fog mixing spray head respectively, the air fog mixing spray heads are arranged towards a centrifugal casting mold to mix compressed air entering the air intake and high pressure water entering the water inlet according to the adjusted proportion into fog and then spray the fog to corresponding outer surfaces of the cold mold from nozzle mouths. The system and the method realize the adjustment of a temperature field during the centrifugal casting, realize the effective control of structural segregation and open grain during the solidification, and have functions of slowing the structural segregation and the open grain of a working layer, can realize the effective control of the upper and lower corrosion amount and the quality of a bonding layer during the vertical core-filling, and have functions of reducing the thickness difference of the working layer and improving the quality of the bonding layer at both ends of a roller.

The invention belongs to the technical field of utilization of biomass, and discloses a front biomass ultra-high-speed self-balancing gasifying co-combustion device and method for a coal-fired boiler. Biomass ultra-high-speed self-balancing gasifying equipment is used for gasifying biomass, and after being cooled and pressurized, fuel gas is delivered into a hearth of the coal-fired boiler and then is combusted. A fuel gas cooling medium is steam which is extracted from a medium-pressure section in a turbine and the temperature of the steam is 400 DEG C, after heat is exchanged between the steam and the fuel gas, secondary heat exchange between the steam and air is implemented, and high-temperature air is produced and supplied for a gasifier. A biomass gasifying coupling large coal-fired power generation system is realized, biomass power generation parameters and efficiency are improved by a high-capacity and high-parameter turbine power generation system, the problem that an existing biomass direct-fired technology is small in power generation scale and low in efficiency is solved, the front biomass ultra-high-speed self-balancing gasifying co-combustion device and method for the coal-fired boiler are suitable for high-alkalinity and high-moisture biomass, and the utilization range of biomass is expanded.

The invention discloses a method for improving radial structure and performance uniformity of a G115 steel large-caliber thick-wall pipe, and belongs to the technical field of steel materials. The process comprises the following steps of a normalizing system and a tempering system, wherein the normalizing system is characterized in that a tube blank subjected to hot-extrusion is adopted, chargingis carried out by using the temperature of 400-600 DEG C, warming is carried out with the heating speed of 100-120 DEG C/h until the temperature reaches 980-1000 DEG C, the hardening time is 0.5-1 min/mm, then warming is carried out with the heating speed of 130-150 DEG C until the temperature reaches 1030-1080 DEG C, then hardening is carried out, the hardening time is 0.5-0.8 min/mm, heat preservation is carried out for 1-3 hours after hardening, and air cooling or water quenching is carried out to the room temperature; and the tempering system is characterized in that charging is carried out by using the temperature less than or equal to 600 DEG C, warming is carried out with the heating speed of 120-150 DEG C/h until the tempering temperature reaches 780 +/- 10 DEG C, the time of heatpreservation is 3-5 hours, and air cooling is carried out to the room temperature. The method has the advantages that the radial temperature field of the thick-wall pipe is improved, moreover, the grain of the thick-wall pipe is not prone to coarsening, so that the radial structure and performance uniformity of the thick-wall pipe is greatly improved.

The invention provides an integrated-designed engine cylinder cover. The engine cylinder cover integrates an exhaust manifold, an EGR cooling device and a secondary air channel device simultaneously. The exhaust manifold is integrated on the exhaust side of the engine cylinder cover. A gas inlet of the EGR cooling device is integrated on the exhaust manifold. A gas outlet of the EGR cooling device is integrated on the gas inlet side of the engine cylinder cover. The secondary air channel device is integrated on the exhaust manifold. The engine cylinder cover is installed as a whole, too many exhaust manifolds, external type EGR cooling devices, external type secondary air channel devices and other parts do not to be installed, through the highly integrated engine cylinder cover, the number and weight of parts of the complete machine are reduced, oil consumption and discharge performance of an engine is also improved significantly, meanwhile, the design of the complete machine is more compact, and the cost of the complete machine has more advantages.

The invention discloses an air-cooled high-temperature alloy carbon black reaction furnace and a carbon black preparation method. The air-cooled high-temperature alloy carbon black reaction furnace comprises a casing, an air inlet assembly and a gas fuel inlet assembly which are positioned on the casing, and a combustion chamber arranged in the casing, the combustion chamber is provided with a throat pipe section, a raw material oil nozzle is arranged on the throat pipe section, and the combustion chamber comprises a flame tube; and a plurality of cooling holes are formed in the flame tube, and the axes of the cooling holes incline in the downstream direction from outside to inside. The invention provides the air-cooled high-temperature alloy carbon black reaction furnace and the carbon black preparation method, the problems in the prior art that the cooling mode of a carbon black reaction furnace is insufficient and the generation quality of carbon black is influenced are solved, andthe purposes of reducing the gas scouring influence and improving the generation quality of carbon black are achieved.

Provided is a method for improving internal quality of casting blank by composite intervention. The method comprises following steps: 1), machining pure iron or steel with the approximate content of steel grades to be an easily-melted cold bodies moving with molten steel and then drying; 2), baking feeding guide pipes which are made by refractory material and immersing them into a crystallizer below the molten steel surface; aligning feeding guide pipe openings to the center of steel streams as for round and square billets; utilizing two guide pipes for plate blank and distributing them on two sides of a wide surface of the crystallizer; 3), continuously injecting the dried cold bodies into a high-temperature region of a molten pool of the crystallizer, adding the cold bodies in the amount of 0.8-1.3% of casting blank; adopting the crystallizer to electromagnetically stir during the continuous casting process. The method for improving internal quality of casting blank by composite intervention has following beneficial effects: cold bodies are fed into the crystallizer such that superheat and temperature gradient of molten steel during mass production of continuous casting; the solidification structure of casting blank is improved; quality flaws of the internal quality of the casting blank is reduced; the temperature field of the crystallizer is improved; and therefore the purposes of increasing equiaxial crystal ratio and improving internal quality of the casting blank are fulfilled.

The invention provides a device for growing lithium aluminate crystals by a pulling method, which comprises a pulling-method single crystal growth furnace. The device is characterized in that the sidewall of a heat preservation cover of the single crystal furnace is intact and is provided with no observation window, and on the furnace wall opposite to an observation window, an observation mirror is erected above the heat preservation cover through a bracket, so as to observe a melt interface in an iridium crucible through the reflection of the observation mirror. The device has the advantages that the device can guarantee the uniformity and symmetry of a temperature field in a cavity of the heat preservation cover, effectively inhibit component volatilization in a process of growing the lithium aluminate crystals by the pulling method, and realize the growth of large-size and high-quality lithium aluminate crystals.

The invention discloses a CO2 air conditioning heat pump system. An outlet of a compressor is connected with an inlet of an indoor gas cooler; an outlet of the indoor gas cooler is connected with inlets of a bypass valve and an expansion valve; an inlet of an outdoor heat exchanger is connected with outlets of the bypass valve and the expansion valve; a d-end inlet of a heat regenerator is connected with an outlet of the outdoor heat exchanger; a d-end outlet of the heat regenerator is connected with a port a of a three-way valve; a port b of the three-way valve is connected with one end of the expansion valve; a port c of the three-way valve is connected with an e-end outlet of the heat regenerator and an inlet of an energy accumulator; an inlet of an indoor heat exchanger is connected with the other end of the expansion valve; an outlet of the indoor heat exchanger is connected with an e-end inlet of the heat regenerator; the e-end outlet of the heat regenerator is connected with aninlet of the energy accumulator; and an outlet of the energy accumulator is connected with an inlet of the compressor. According to the CO2 air conditioning heat pump system, by reasonably arranging asystem process, the expansion valve and various electromagnetic valves are opened and closed by using a control unit; and therefore, conversion among three modes of a refrigeration mode, a heating mode and a dehumidification mode, and the functions of the unit are comprehensive.

The invention relates to a temperature control system of an energy storage box. The system comprises an air conditioner, a fan, an air duct and a battery rack, wherein an air outlet of the air conditioner is communicated with the air duct, the air duct is of a tubular structure defined by sequentially connecting air duct plates, the air duct is arranged above the fan, the fan is arranged above thebattery rack, the air duct plate is provided with an opening facing the fan, an adjustable shutter is arranged on the opening, and outlet air of the air conditioner is guided to the fan by the opening of the air duct and is blown to the battery rack by the fan. According to the mode, the purposes of improving the internal temperature of the energy storage box and reducing the temperature difference of air in the energy storage box can be achieved.

The invention discloses a method for improving radial structure uniformity of a martensite heat-resistant steel large-caliber thick-wall pipe, and belongs to the technical field of steel and iron materials. The method comprises the following steps that a pipe blank subjected to hot extrusion is adopted, is placed into a furnace, is heated to 930-980 DEG C by taking the heating speed of 100-120 DEGC per hour, then undergoes heat preservation for 1-6 hours, then is cooled to 740 DEG C +/- 10 DEG C, then undergoes heat preservation for 60-100 hours, and then is cooled along with the furnace; thepipe blank obtained through the above step is placed into the furnace, is heated to 980-1000 DEG C by taking the heating speed of 100-120 DEG C per hour, then is heated to 1040-1100 DEG C as soon aspossible, undergoes heat preservation for 1-3 hours after undergoing hardening, and then undergoes air cooling or water quenching to reach the room temperature; then the pipe blank obtained through the last step undergoes the tempering system, wherein the pipe blank is placed into the furnace is heated to the tempering temperature of 780 +/- 10 DEG C by taking the heating speed of 130-150 DEG C per hour, undergoes heat preservation for 3-5 hours, and then undergoes air cooling to reach the room temperature. The method has the advantages that the structure heredity is eliminated, the radial temperature field of the thick-wall pipe is improved, moreover, the grain is refined, and the uniformity of the radial structure and the performance of the thick-wall pipe is greatly improved.

The invention discloses an air cylinder cover of an automobile engine. The air cylinder cover comprises air inlet channels, exhaust channels, an exhaust manifold, a water jacket and a combustion chamber. The air inlet channels and the exhaust channels are connected with the combustion chamber. A combustion chamber step structure is arranged in the combustion chamber, and combustion chamber steps are arranged at the positions, facing the upper portion of the combustion chamber, of seat ring holes. According to the technical scheme, the air inlet channels and the combustion chamber are optimized, and therefore the low-speed tumble ratio is increased, in-cylinder combustion is improved, and the wall wetting condition is reduced to the largest degree; oil consumption is reduced, and particle emissions are reduced; branches of the exhaust channels of all cylinders are slightly lengthened and are finally gathered to a general branch, and an assembly type exhaust manifold is omitted; the exhaust manifold is integrated on a cylinder cover body, exhaust heat is fully utilized, the temperature of the engine is increased fast, and driving and taking comfort is improved; the complete engine frictional work is reduced, and therefore oil consumption of the complete engine is reduced; and by means of the water jacket structure, the water flow manner is adjusted, the temperature field of the cylinder cover body and the part integrated with the exhaust manifold is improved, and the cylinder cover body and the exhaust integration structure are fully cooled.

A laser sintering 3D printing thermal compensation system is provided and includes a controller and a heating device and a temperature field sensing device respectively connected to the controller, in which the temperature field sensing device is configured to determine a detection result by detecting within a printing region, the detection result includes a high temperature region and a relatively low-temperature region, and the controller is configured to control the heating device to heat the relatively low-temperature region for conducting thermal compensation, thereby reducing the temperature difference between the high temperature region and the relatively low-temperature region, and overcoming drawbacks of conventional arts having inaccurate control of the temperature field, causing interface defects due to temperature unevenness, and, consequently, greatly reducing the printing quality.

The invention discloses an integrated structure of evaporation tubes, an evaporation tube type combustion chamber and a miniature turbojet engine. The integrated structure of the evaporation tubes isused to impact and mix fuel sprayed from fuel nozzles through high-speed airflow to form a fuel-air mixture and spray the fuel to the head area of the combustion chamber. The integrated structure of the evaporation tubes comprises a plurality of evaporation tubes integrated with a support ring of the combustion chamber, wherein the evaporation tubes are evenly arranged on the support ring of the combustion chamber in the circumferential direction, first ends of the evaporation tubes are inlet ends for inputting the high-speed airflow, second ends of the evaporation tubes are outlet ends for spraying the fuel-air mixture, the evaporation tubes comprise corrugated sections close to the inlet ends, the corrugated sections are provided with corrugated cavities protruding outwards in the radialdirections of the evaporation tubes, and the fuel nozzles are inserted from the outlet ends of the evaporation tubes into the corrugated sections of the evaporation tubes, so that the fuel sprayed from the fuel nozzles is impacted and mixed by the high-speed airflow in the corrugated sections to form the fuel-air mixture, and then the fuel is sprayed from the outlet ends of the evaporation tubesto the head area of the combustion chamber.

The present invention relates to the technical field of target catching and specifically discloses a flexible catching mechanism, specifically including a flexible capsule device, a phase change magnetorheological material, a surface microstructure, an electromagnet, a heating structure, a piston structure and a support structure; wherein the flexible capsule device is filled with the phase changemagnetorheological material; the surface microstructure is disposed on the outer surface of the upper end of the flexible capsule device; the heating structure is disposed inside the flexible capsuledevice; the piston structure is disposed on the lower end of the flexible capsule device, and is axially movable along the un-down direction of the flexible capsule device; the support structure is used for supporting the flexible capsule device; and the piston structure and the support structure are configured to seal the flexible capsule device. The invention provides the novel catching mechanism, which can catch targets having different shapes, surfaces and motion characteristics.

The invention provides a thermal diaphragm suitable for an annular solar telescope. One end of the thermal diaphragm suitable for the annular solar telescope toward the direction of light incidence isa reflective surface, and the other end is a bottom surface; the reflective surface of the thermal diaphragm suitable for the annular solar telescope is an inverted cone shape, and the bottom surfaceis a positive cone shape; the reflective surface with the inverted cone shape and the bottom surface with the positive cone shape are tangent at the vertexes of the two cones to form a light passinghole; and the cone angle of the inverted cone of the reflective surface is 88 to 93 degrees. The thermal diaphragm structure design provided by the invention strengthens the thermal control ability near the light passing hole, optimizes the temperature field near the light passing hole, reduces stray light to the greatest extent, and suppresses a ghost image; and the thermal diaphragm suitable forthe annular solar telescope has good temperature control effect, no ghost image and good stray light suppression effect, which ensures the imaging quality of the telescope.

The invention belongs to the field of ship ventilation and interior decoration, and provides a ship cabin rain-down type air supply and return system and a ship, and the system comprises a static pressure silencing box which is arranged below a deck of a ship cabin and is communicated with an air supply pipeline of the ship cabin; a first rain down ceiling which is arranged on the bottom face of the static pressure silencing box, and a first gap with the void ratio determined based on the air supply amount of the air conditioner is formed in the first rain down ceiling; and a second rain descending ceiling which communicates with an air return pipeline of the ship cabin, and a second gap with the void ratio determined based on the air return amount of the air conditioner is formed in the second rain descending ceiling; return air passes through the second rain down ceiling and then is sent back to the return air pipeline through the outside of the static pressure box silencing box. The air outlet area of the air conditioner is increased, air outlet of the air conditioner is uniform, the temperature field is good, and the air speed is reduced, so that noise reduction is achieved, and the comfort and experience of personnel in a cabin are improved; a grid does not need to be additionally arranged on a cabin door to serve as an air return opening, and privacy of personnel in a cabin is protected.