96results about How to "Reduce flow dead zone" patented technology

The invention discloses a coarse ring-free aluminum alloy bar. The coarse ring-free aluminum alloy bar is prepared from the following components in percentage by weight: 0.62 to 0.7 percent of Si, 0.3 to 0.4 percent of Fe, 0.2 to 0.35 percent of Cu, 0.1 to 0.15 percent of Mn, 0.9 to 0.98 percent of Mg, 0.15 to 0.25 percent of Cr, 0.25 percent of Zn, 0.06 to 0.13 percent of Ti and the balance of Al. According to the coarse ring-free aluminum alloy bar disclosed by the invention, the addition range of Cr and Mn elements is strictly controlled on the basis of 6061 aluminum alloy specified in the national standard GB/T3191-2010, and the Cr and Mn elements have a function of inhibiting grain expansion in the aluminum alloy; the temperatures of a die, a cast ingot and an extrusion container can be controlled during a follow-up extrusion process, so that the shear deformation of a material during extrusion is reduced; an arc-shaped die bearing is adopted, so that the material flowing dead zone of an extrusion die is reduced; by using the produced 6061 aluminum alloy bar, a coarse ring cannot be fundamentally seen, the mechanical performance of a material and the oxidation performance of a product are greatly increased, the color of the material is consistent after an anode is oxidized, and the coarse ring-free aluminum alloy bar has no defects of piebaldness and the like.

The invention relates to a shell-and-tube heat exchanger with rotary jet-flow baffle plates, in particular to a shell-and-tube heat exchanger used for heat exchanging between two fluid media in the fields such as nuclear energy, power, oil refining, chemical engineering and petrochemical engineering. The shell-and-tube heat exchanger with the rotary jet-flow baffle plates is simple and reasonable in structure, capable of effectively reducing flow resistance, enlarging the flow area, improving turbulence effect, and reducing shell side dead zones, and high in heat exchanging efficiency. According to the technical scheme, the shell-and-tube heat exchanger with the rotary jet-flow baffle plates comprises a shell body and tube boxes arranged on the two ends of the shell body, a tube side fluid inlet is formed in the tube box at one end of the shell body, a tube side fluid outlet is formed in the tube box at the other end, a shell side fluid inlet and a shell side fluid outlet are formed in the shell body, heat exchanging tubes and the baffle plates are arranged inside the shell body, a plurality of through holes are formed in each baffle plate, the heat exchanging tubes are perpendicular to the baffle plates and penetrate through the baffle plates, and a plurality of jet-flow pieces are arranged in each through hole of each baffle plate. The shell-and-tube heat exchanger with the rotary jet-flow baffle plates is mainly used for heat exchanging between fluid media.

The invention provides an immersed self-flow-interfering shell-and-tube-type heat exchanger. The heat exchanger comprises a shell, a liquid distribution device, a self-flow-interfering device and a liquid collection device; a cooling liquid inlet and a cooling liquid outlet are formed in the shell; the cooling liquid inlet communicates with the liquid distribution device; the liquid distribution device communicates with the self-flow-interfering device; the liquid collection device is located on the upper part of the shell and below the liquid surface of cooling liquid; the liquid collection device communicates with the cooling liquid outlet; the cooling liquid enters the shell sequentially through the cooling liquid inlet, the liquid distribution device and the self-flow-interfering device, and flows out of the cooling liquid outlet through the liquid collection device; a heat source is immersed in the cooling liquid in the shell; and the liquid distribution device comprises a liquiddistribution mother tube which communicates with the cooling liquid inlet. The immersed self-flow-interfering shell-and-tube-type heat exchanger is controlled through liquid outlet temperature, so that the effects of automatic controlling and energy saving are realized; the interfering strength of a cooling liquid flowing field in the shell is enhanced; and the heat exchanging efficiency is improved.

The invention discloses a multistage-welding-chamber extrusion mould used for producing aluminium sections. The extrusion mould comprises an upper mould and a lower mould. The upper mould comprises a guide plate. The guide palate is provided with a plurality of flow distribution bridges. A plurality of flow distribution holes are formed among the plurality of the flow distribution bridges. The extrusion mould is characterized in that intersections of the flow distribution bridges are lower than a material feeding surface around to form recessed surfaces; slopes are disposed between the flow distribution bridges and the recessed surfaces on the material feeding surface for transition to form first pressure-relief angles; flow distribution hole and feeding openings in the recessed surfaces form second pressure-relief angles; two sides of the flow distribution bridges form third pressure-relief angles; the lower end of the guide plate is provided with multistage welding chambers communicated with the flow distribution holes; and the multistage welding chambers are disposed below the material feeding surface of the lower mould. The invention also discloses an extrusion technology for producing the aluminium sections by the extrusion mould. The multistage-welding-chamber extrusion mould can effectively control metal flow, and therefore the speed distribution in the section of the aluminium sections is uniform, the thickness of the mould is increased relatively, the mould intensity is enhanced, the stage of the welding chambers is increased, the welding pressure increases gradually, and the quality and the surface of the welding seams are improved.

The present invention discloses a solid state lamp, comprising an LED light source and a heat sink, the LED light source is provided in the distal end of the heat conducting column, wherein the heat sink uses a sunflower structure with ribs projecting from the side of the heat conducting column, mainly characterized in that the ribs are opened with airflow grooves perpendicular to the axis and penetrating through the circumferential ring, wherein the depth of the deepest airflow groove is greater than half the rib length, the airflow groove has a width of not less than 2mm, and the average height of the short rib is less than five times the average rib gap; the averaged rib length on the heat sink is greater than10mm. The present invention solves the problems of poor air circulation and serious deterioration in heat dissipation efficiency when the heat sink axis level is transversely placed. The present invention also discloses an LED bulb having optimal structure size and the new structure to enable efficacies of lower cost and higher cooling effect.

The invention provides an assembled wall body, a building and a construction process control system of the building. The solar assembled building wall body comprises a bottom wall body and non-bottomwall bodies which are assembled, wherein the bottom wall body is arranged at the bottom of the wall body, one non-bottom wall body is assembled at the upper part of the bottom wall body, and another non-bottom wall body is assembled at the upper part of the non-bottom wall body, so that the solar assembled building wall body is formed. The invention provides the novel assembled building wall body.Two assembled wall bodies are respectively arranged at the bottom and the non-bottom part. Through the assembly of the assembled wall body, through the arrangement of transparent plates, preheating pipes and other devices, air entering a heat collector can be preheated first, the air conditioning effect is achieved, and the reasonable utilization efficiency of solar energy is improved.

The invention discloses a liquid-cooling cold plate, which comprises a liquid inlet connector, a liquid outlet connector, an upper cover plate, frame strip seal, fins, pad blocks and a bottom board, wherein the pad blocks and the fins are arranged in the frame strip seal; the upper cover plate and the bottom board are connected to the two sides of frame strip seal through vacuum brazing to form a sealed heat exchange cavity; the two sides of the pad blocks are connected with the upper cover plate and the bottom board through vacuum brazing respectively; the liquid inlet connector and the liquid outlet connector are connected with the upper cover plate through vacuum brazing; and the inner side surface of the frame strip seal or/and the outer side surfaces of the pad blocks contacted with a heat exchange medium are respectively provided with a groove. The liquid-cooling cold plate is simple in structure, low in cost, high in heat exchange efficiency, good in brazing process, high in welding finished product rate, more beautiful in appearance, small in flow dead zone and good in temperature uniformity.

The invention discloses a high-efficiency scaling turbolator ring pipe frame and a heat exchanger with the same. The high-efficiency scaling turbolator ring pipe frame is mainly composed of a fixing ring, a plurality of ring pipes and a plurality of scaling turbolators. The plurality of ring pipes and the plurality of turbolators are fixedly arranged inside the fixing ring, the ring pipes are distributed at intervals, every turbolator is arranged between two neighboring ring pipes and fixedly connected with the neighboring ring pipes, the interval between the neighboring ring pipes is a channel for out-pipe heat exchange medium to flow, and the ring pipes are used for penetrating heat exchange pipes. The high-efficiency scaling turbolator ring pipe frame is applicable to ordinary heat exchange pipes, can reinforce out-pipe heat exchange, reduce out-pipe flowing and heat exchange dead areas and improve the effective heat exchange area of the heat exchanger, and enables a traditional shell-and-tube heat exchanger to be updated and improved into a high-efficiency heat exchanger. Meanwhile, the high-efficiency scaling turbolator ring pipe frame can also be applied to a high-efficiency heat exchanger, can reinforce the in-pipe heat exchange and the out-pipe heat exchange simultaneously, and improves the average heat exchange coefficient of the heat exchanger.

The invention discloses a winding tube type heat exchanger with a circular tube flow guider and an inner lining barrel device. The winding tube type heat exchanger comprises a tube box (4), a tube plate (5) and a shell pass barrel body (7), and the winding tube type heat exchanger is characterized in that the annular tube flow guider (1) is mounted on the outer side of the shell pass barrel body(7) corresponding to a straight tube transitional area (13); on one hand, the annular tube flow guider (1) communicates with a reaction medium, and on the other hand, the annular tube flow guider (1)uniformly conveys the medium into the straight tube transitional area (13) through multiple channels; simultaneously/or, the inner lining barrel (10) is mounted in a barrel body, corresponding to a winding tube heat exchange area (11), of the inner part of the shell pass barrel body (7); the upper end of the inner lining barrel (10) is hermetically connected with an inner wall of the shell pass barrel body (7); and a channel into which the medium enters is reserved between the lower end of the inner lining barrel (10) and the inner wall of the shell pass barrel body (7). According to the winding tube type heat exchanger disclosed by the invention, a flowing dead area of an entrance part of a shell pass medium is reduced, a flowing area of the shell pass medium is widened, a flowing gap isreduced, flowing short-circuit of the shell pass medium is effectively improved, an effective utilization ratio of the heat exchange area of the winding tube type heat exchanger is increased, and theoverall heat exchange efficiency of the heat exchanger is also obviously improved.

The invention provides a ventilation system using solar energy and a building thereof. The cold source comprises air, and the air is heated and then conveyed into building rooms, thereby forming an air supply system. The ventilation system further comprises a filtering module which is used for filtering the inlet air, the filtering module is arranged in an air inlet channel, and a primary effect filter, an electrostatic precipitator, an activated carbon filter and a high efficiency filter are sequentially arranged in the filtering module; the primary effect filter is one or more of non-woven fabric, nylon net, fluffy fiberglass felt, plastic net or metal mesh; the electrostatic precipitator comprises an electrostatic dust removal section, the electrostatic dust removal section comprises two stages, the two stages are a first stage and a second stage in the air flow direction, and the electric field strengths of the first stage and the second stage are different; and the material of thehigh efficiency filter is one or more of PP filter paper, glass fiber paper and PET filter paper. The invention provides a fresh air system, the fresh air system is provided with the novel filteringmodule, and the effect of purifying air can be achieved.

The invention relates to a transverse slot pipe heat exchanger, in particular to an asymmetric retractable transverse slot pipe heat exchanger, which belongs to the technical field of heat exchanging process equipment and aims at solving the problems of low comprehensive heat transfer efficiency and being inapplicable to gas-steam heat exchanging in the existing transverse slot pipe heat exchanger. Each heat exchanging pipe is an asymmetric retractable transverse slot pipe; the curvature radius of an arc surface of the inside wall of the asymmetric retractable transverse slot pipe located at a flowing away side is less than that of an arc surface of the inside wall of the asymmetric retractable transverse slot pipe located at an incoming flow side; the width of an opening of a ringlike slot arranged on the asymmetric retractable transverse slot pipe is at a range of 6-10mm; the height of a bead of the ringlike slot arranged on the asymmetric retractable transverse slot pipe is at a range of 0.6-1.1mm; and the wall thickness of the asymmetric retractable transverse slot is at a range of 2-3mm. The transverse slot pipe heat exchanger provided by the invention is applicable to the industrial field, and is particularly applicable to the gas-steam heat exchanging.

The chaotic fin tube comprises a fin tube unit which is made of several units of direct current phase, transitional phase and twisted direct current phase, with same geometrical appearance of the direct current phase and the twisted direct current phase within each unit, axially symmetrical rounding the transitional phase center perpendicular to the bottom. The cross section of the direct current phase and the twisted direct current phase takes on geometrical shapes, which ensures the two dimensional change on the cross section and the twisted change along the third shaft of the liquid. The plate-fin heat exchanger comprises seals, clapboard, and chaotic fins made by multi fins longitudinally and horizontally connected. Ingenious in design, simple in processing, it exchanges heat based on chaotic principle, having better effect than that of the laminar flow and lower pressure drop compared with onflow. Liquids have better status than the current flow channel, with less dead corner, fine mixing efficiency and greatly reducing the opportunity of flow channel block.

The invention discloses a grid type supporting baffling device of a shell-and-tube heat exchanger, which comprises supporting limiting rings fixedly connected with the inner wall of a heat exchanger shell. A plurality of grid plates are connected in a crossed manner in each supporting limiting ring to form a porous grid, heat exchange tubes penetrate through holes of each grid, outer walls of the heat exchange tubes closely contact with inner walls of the holes, and two ends of each grid plate are fixedly connected with the inner wall of the corresponding supporting limiting ring. By the aid of the grid type supporting baffle device, heat transfer efficiency can be effectively improved, resistance loss of a shell pass is reduced, vibration of the heat exchange tubes is avoided, and the service life of equipment is prolonged.

The invention provides a solar system, a heating and ventilating system and a building roof with the solar system. The solar system comprises a collector. The collector comprises heat collecting pipesand a reflecting mirror. The heat collecting pipes are flat pipes. The lower flat surfaces of the flat pipes are opposite to the reflecting surface of the reflecting mirror. Each flat pipe comprise abottom plate on the lower side and an upper cover on the upper side, wherein the upper cover and the bottom plate are assembled together to form a cavity of the flat pipe, and fluid flows in the cavity. Each bottom plate comprises a plurality of heat exchange area. Each heat exchange area comprises vertical plates and column ribs. The novel solar system is developed, and a flow guide structure isarranged in a cold plate of each heat exchange area, so that a refrigerant flowing dead area is effectively reduced, and the thermal homogeneity of a hot flow surface is further improved; and by means of the column ribs, the disturbance to the flow field is enhanced, the heat exchange area is expanded, and heat exchange can be easily reinforced.

The invention discloses an air outlet structure of a passenger cabin of a civil aircraft, belonging to the field of aircraft environmental control design. The structure comprises an air outlet housing(1) and a rectifying grill (2), the air outlet housing (1) comprising a first portion connecting an air supply duct, a second portion extending from the first portion to the passenger compartment ofthe civil aircraft, and a third portion connecting with the passenger compartment of the civil aircraft; the rectifying grille (2) is a plate-like structure having through holes provided in the secondportion of the air outlet housing (1) for separating the first portion from the third portion of the air outlet housing (1). Through the rectifying grille provided with several through holes, the gassent in from the outside is evenly distributed, the flow field distribution of the air outlet of the passenger cabin of the civil aircraft is improved, the circulation flow of the air in the cabin ispromoted, the dead zone of the gas flow is reduced, and the comfortable cabin environment is provided for the occupants.

The invention belongs to an electric heating water tank, particularly relates to a high power density electric heating water tank for secondary pre-service hydraulic pressure test of a steam generator, which comprises a cylinder, an electric heater, a water inlet pipe and a water outlet pipe; the heating end of the electric heater is located inside the cylinder, the water inlet pipe is arranged at one end of the bottom of the cylinder, and the water outlet pipe is arranged at the other end of the bottom of the cylinder. The water tank has smaller volume, high heating power and high thermal efficiency and can realize quick temperature rise of a secondary shell of the steam generator.

The invention provides a light-emitting diode (LED) optical engine which is a standard module of an LED illuminating device and can be conveniently realized. The LED optical engine comprises an LED light source (3) and cooling fins, wherein the cooling fins form a sunflower-shaped structure. The LED optical engine is mainly characterized in that the cooling fins (1) are respectively provided with cross flow grooves (5); each cooling fin is divided into a plurality of short fins (4), so that the problems that the ventilation performance is poor and the heat dissipation performance seriously worsens when axes of the cooling fins are horizontally arranged are solved. The LED light source (3) and an external power supply are connected by adopting a splicing structure, so that assembly and maintenance are convenient. The invention also provides an LED bulb lamp with an optimized structure size and a novel structure, and thus, lower manufacturing cost and a higher heat dissipation effect can be realized.

The invention discloses a cooling device of a power converter and the power converter, and belongs to the technical field of power converters. The cooling device of the power converter comprises a shell and a lower cover plate, a communication groove and a mounting cavity are formed in the shell, openings of the communication groove and the mounting cavity face opposite directions, and a flow guide rib is arranged on the communication groove to separate the communication groove; the lower cover plate is arranged on the shell, the lower cover plate and the communication groove form a waterway channel, and a diversion rib divides the waterway channel into shunting channels. The power converter comprises the cooling device of the power converter. According to the cooling device of the power converter and the power converter, the diversion rib is arranged in the communication groove to reduce a cooling liquid flowing dead zone, and a heat dissipation part is arranged in the mounting cavity, so that heat conduction between the to-be-cooled element and the waterway channel is improved, and the cooling efficiency is improved.

The invention provides a design method of a water-cooled tube plate type heat exchanger. The heat exchanger comprises a base plate and a cover plate, the cover pate and the base plate are assembled together to form a fluid space, the base plate is provided with baffles and cylindrical fins, the baffles comprise the first baffle located at the center of the base plate, the second baffle surroundingthe first baffle and the third baffle surrounding the second baffle, and a nusselt number and other formulas are designed through parameters. According to the design method, through a large number ofresearches, the structure of the heat exchanger is simulated, the nusselt number and other formulas of the structure are determined for the first time, and the heat dispersion performance and pump power consumption of a water-cooled plate can be estimated by the formulas.

The invention provides a launcher barrel cooling water jacket based on turbulent flow blades. The launcher barrel cooling water jacket comprises a water jacket body, a water inlet and a water outlet.The water jacket body is tubular and is fixed to a launcher barrel. The water inlet and the water outlet are located in the upper and lower wall faces of the two ends of the water jacket body correspondingly. A plurality of T-shaped water delivery blades are arranged on the inner wall of the water jacket body in the circumferential direction. Each T-shaped water delivery blade is in a strip shapeand is arranged in the axial direction of the water jacket body. According to the launcher barrel cooling water jacket, the barrel can be cooled efficiently in the continuous shooting process of a launcher.