16 results about "Internal convection" patented technology

This invention discloses a centerless cylindrical grinding machine device for valve guides, belonging to the field of valve guide grinding. The device is used for infeed grinding of valve guides and includes a machine table, an adjusting frame and a grinding head holder respectively disposed on both sides of the machine table, and a workpiece support frame disposed between the adjusting frame and the grinding head holder and fixedly mounted above the machine table. This invention achieves axial elastic limiting of the valve guide through a clamping assembly and a reversing assembly, and, in conjunction with radial support from the workpiece support frame, effectively suppresses grinding movement and wobble of slender workpieces, improving grinding stability, coaxiality, and dimensional accuracy. After processing, it can automatically switch to a clamping and transfer mode for automatic unloading, achieving a high degree of automation. Simultaneously, cutting fluid can be directionally introduced into the inner hole of the valve guide and overflowed from a high position, forming internal convection heat transfer and significantly improving the cooling effect. After grinding, by flipping the drain hole, residual fluid in the inner hole is quickly drained by gravity, further stabilizing machining accuracy.

The utility model discloses a rapid cooling mold for spring resin, and belongs to the technical field of mold cooling. The utility model relates to a rapid cooling die for spring resin, which comprises a liftable die and a cooling component communicated with the die. The cooling assembly comprises an air channel and a cooling nozzle, and the cooling nozzle is installed on the air channel in a lifting mode and communicated with the air channel. And the cooling nozzle is communicated with the interior of the mold through a pressurizing nozzle arranged on the mold. According to the utility model, pressurized air blowing is carried out on the interior of the mold, convection in the mold is increased, a product can be cooled without opening the mold, and meanwhile, cold air is blown in to quickly cool the product, so that the cooling speed is increased, and the processing rate is increased.

The utility model relates to the field of positioning plates, and discloses a heat-conducting anti-deformation positioning plate, which solves the problems in the background technology, and comprises three support legs which are distributed at equal angles of 120 degrees, a central positioning table is arranged at the intersection of the support legs, and heat-conducting hole channels which axially extend are arranged in the support legs; reinforcing ribs are arranged between the adjacent supporting legs; an annular radiating fin array is arranged on the bottom surface of the central positioning table; the tail end of each supporting leg is provided with a mounting base with a heat conduction boss. The heat conduction sectional area is maximized through the hexagonal hole channels, the spiral flow guide grooves induce airflow vortex, and internal convection heat dissipation is accelerated; the heat bridge connection realizes directional conduction of heat from the mounting base to the central positioning table, and the overall heat conduction efficiency is improved by more than 40% in cooperation with the wavy lines; and material softening or structure failure caused by local high temperature is effectively avoided.

This invention discloses a corrugated plate cooling device and its application, belonging to the field of aero-engines. It includes a cold-side corrugated plate, a hot-side corrugated plate, and hollow baffle columns. The cold-side corrugated plate is located on one side of the cold air passage, and the hot-side corrugated plate is located on the other side of the high-temperature gas passage. The two corrugated plates are staggered, with the crests corresponding to the troughs. A gourd-shaped intermediate channel with a periodically changing cross-sectional area is formed between the two corrugated plates. Several hollow baffle columns are arranged between the cold-side and hot-side corrugated plates, connecting the cold air passage and the high-temperature gas passage through hollow holes within the columns. The hollow baffle columns connect with the troughs of the cold-side corrugated plate and the crests of the hot-side corrugated plate. This invention employs a cooling structure combining double-layer corrugated plates and hollow baffle columns, fully utilizing the advantages of internal convection cooling and the corrugated plate itself.

The invention discloses an infrared graph diagnosis method and system for thermal defects of building energy-saving reconstruction, and relates to the technical field of building defect diagnosis, and the method comprises the steps: synchronously obtaining an infrared image sequence and wind speed vector data at a corresponding moment; radiation correction and time sequence registration are carried out on the infrared image sequence, and then an external space-time temperature field is extracted; generating an external disturbance characteristic sequence based on the space-time temperature field and the wind speed vector data; the temperature gradient and the time sequence change rate of the internal air layer are obtained, and an internal convection characteristic sequence is generated after fusion; calculating a time sequence correlation coefficient between the external disturbance characteristic sequence and the internal convection characteristic sequence; according to whether the time sequence correlation coefficient is lower than a threshold value or not, an effective internal convection signal with external airflow interference removed is directly determined or obtained through decoupling correction; and finally, identifying a thermotechnical defect area in the building envelope based on the effective internal convection signal. The method has the beneficial effect that the energy-saving reconstruction diagnosis accuracy and reliability of complex enclosure structures such as double-layer curtain walls are improved.

The purpose of this invention is to provide a high-efficiency cooling structure for turbine blade crowns with a rotary cooling channel, belonging to the field of gas turbines. It includes blades, rim plates, tenons, and a crown. The crown is located above the blades, which are fixed to the tenons by the rim plates. A rotary cooling channel is installed inside the crown. The upper and lower surfaces of the crown have film cooling holes, and the pressure side of the blade has film cooling holes on its surface. Part of the cold air entering the blade flows out through the film cooling holes on the blade surfaces, while the other part enters the rotary cooling channel through the film cooling holes on the lower surface of the crown and flows out through the film cooling holes on the upper surface of the crown. This invention, by introducing a rotary cooling channel structure into the turbine blade crown, enhances internal convective heat transfer and simultaneously achieves leakage control. The circular film cooling holes form a surface isolation film, and this dual cooling mechanism significantly improves cooling performance, overcoming the limitations of traditional crowned blades that rely on simple geometric barriers.

The invention relates to an improved extrusion device for recycling plastic waste, comprising a housing (10) with a tubular processing space (11), an inlet opening (13) into the processing space (11) formed at one end (12) of the housing (10), and an outlet opening (14) from the processing space (11) located at the other end (14) of the housing (10), a conveying screw unit (20) is rotatably inserted into the processing space (11) of the housing (10), and the conveying screw unit (20) is connected to a drive unit (30), and the conveying screw unit (20) is divided into at least two sections (A, B).  The device is characterized in that one or more toroidal bodies (40, 50) provided with a through opening (41, 45) are arranged in the processing space (11), and the processing space is divided into two or more processing space sections (11a, 11b) by the toroidal bodies (40, 50), the conveying screw unit (20) is composed of counter-rotating screws (21, 22), the screws (21, 22) are guided through the through-opening (41, 51) of each of the toroidal bodies (40, 50), and each section (A, B) of the conveying screw unit (20) is separated from the other by the toroidal bodies (40, 50), and the free area (F) of the through-opening of the toroidal bodies (40, 50) is between 7 000 and 28 000 mm2.  The invention also relates to a method that can be carried out using the device, the essence of which is that by using the toroidal bodies, the plastic waste mixture to be processed is brought to the desired temperature in stages but continuously by means of the thermal effect of internal convection, and thus a homogenized molten plastic mixture is created, which is pressed through an outlet opening (15) with a free cross-section of 25-120 mm and delivered to the shaping tool (2).

According to the axial flow turbine with the inner duct fan, in the axial flow turbine, a turbine blade disc is of a symmetrical structure relative to the central axis, turbine rotor blades extend in the radial direction from the turbine blade disc, turbine gas channels are distributed in the turbine rotor blades, inner duct air flow channels are distributed in the turbine blade disc, and the inner duct fan is arranged in the inner duct air flow channels. At least one inner ducted fan blade extends from the turbine bladed disc to form a cooling air flow in the inner ducted air flow channel, the temperature of the cooling air flow being lower than that of fuel gas in the turbine fuel gas channel.

The present invention is directed to a squash ball warming oven. The warming oven has an internal convection heat source capable of maintaining a constant temperature over long periods of time. Removable wire racks are mounted within the warming oven. The wire racks have indentations sized and shaped to hold squash balls. Arranging the squash balls in indentations on the wire rack prevents them from touching while warming, resulting in rapid and even warming. By gently and evenly warming squash balls, performance of the ball is easily improved for players of all levels.

This utility model discloses a cooling device for thermally conductive structural adhesive, relating to the field of chemical technology. It includes a guide platform located below a feeding platform. Two rows of heat dissipation pipes are longitudinally arranged on the bottom surface of the guide platform, with an even number of pipes in each row. The heat dissipation pipes penetrate the bottom surface of the guide platform, and their top surfaces are flush with the inner bottom surface of the guide platform. A convection chamber is located at the bottom end of the guide platform, with all heat dissipation pipes located inside the convection chamber. An air inlet is located at the center of the longitudinal end of each heat dissipation pipe in the convection chamber. Multiple first air outlets are located at the transverse ends of each heat dissipation pipe in the convection chamber, with the number of first air outlets equal to the transverse number of heat dissipation pipes. The center of each first air outlet coincides with the center of the side surface of the heat dissipation pipe. This utility model provides a cooling device for thermally conductive structural adhesive by incorporating an air extractor, which directly absorbs some of the heat dissipated by the high-temperature adhesive within the heat dissipation pipes.

The invention provides an air inlet amount control system, an air inlet amount control method and gas supply equipment, and relates to the field of semiconductor device processing. The air inlet amount control system comprises a temperature sensor, a controller, a motor and an air inlet amount adjusting structure located at an air inlet of the gas supply equipment, and the temperature sensor is used for collecting the temperature of a vaporizer in the gas supply equipment and transmitting the collected temperature to the controller; the controller is used for determining the difference value between the temperature and the target temperature and outputting a control signal to the motor according to the difference value; the motor is used for driving the air inlet volume adjusting structure to move according to the control signal and changing the air inlet area of the air inlet. The air inlet area of the air inlet can be dynamically adjusted according to the difference value between the actually measured temperature and the target temperature of the vaporizer, the influence of convective heat transfer in the gas supply equipment on the temperature of the vaporizer is reduced, and the vaporization performance of the vaporizer is guaranteed.

The utility model discloses a transparent warmer with humidification function. Including transparent heating assembly and frame assembly, transparent heating assembly includes at least two pieces of parallel interval arrangement's heating glass, and the cavity for air convection is formed between two pieces of heating glass, and this cavity is equipped with lower air inlet and upper air outlet. The warmer still includes the humidification assembly of setting in the lower part of frame assembly, and it includes water storage tank, atomizer and fan. The mist outlet of humidification assembly communicates with the lower end of cavity, and the airflow of fan will mist drive to the cavity actively, and after mixing with the air of entering from air inlet, it will rise and discharge from air outlet together. The utility model ingeniously combines humidification system and the internal convection cavity of warmer, makes mist directly supplement to the heated air flow, realizes the integration of heating and humidification function, effectively solves the air dry problem caused by heating, and significantly improves user comfort.

This invention discloses a green-environment circulating convection potential energy generator set, belonging to the field of new energy power generation technology. The equipment consists of a pit base, an eccentric acceleration ring, a large and small gear ring transmission assembly, a leverage acceleration wheel, an eccentric speed-up track, a gourd-shaped hammer assembly, an energy water convection cavity, and a cavity-sealed balanced pressure stabilization system. This invention relies on its own structural counterweight and the convection within the sealed energy water system to achieve continuous energy conversion using gravitational potential energy. It does not depend on fossil fuels and is not constrained by wind or photovoltaic power. The overall structure is reasonable, the speed is stable, it is suitable for 5 MW installed capacity, and it can generate electricity continuously for a long period. It solves the defects of traditional generator sets, such as high energy consumption, high pollution, and environmental limitations, and has practical and promotional value.

The present application relates to the technical field of additive manufacturing, and discloses an additive manufacturing heat-crack-free precipitation-strengthened high-temperature alloy and a preparation method thereof. The present application divides the layer into a plurality of mutually parallel scanning strips according to a preset translation direction and scanning strip interval, and performs strip scanning by means of laser self-rotation + translation motion coupling, thereby significantly enhancing the molten pool disturbance, realizing periodic shearing fracture of dendrite tips, breaking the columnar crystal epitaxial growth, realizing grain equiaxialization, and weakening anisotropy. In addition, the laser scanning is a high-speed scanning strategy with a translation speed greater than or equal to 1500 mm / s, shallow molten pools are formed by high-speed scanning, the surface tension in the shallow molten pool is utilized to strengthen the internal convection of the molten pool, the dendrites are refined, the formation of columnar crystals in the high-temperature alloy is further reduced, the anisotropy of mechanical properties is significantly eliminated, and the transverse strength and creep resistance under high temperature are improved. Equiaxed grains can effectively hinder the directional propagation of cracks along the columnar grain boundary, thereby significantly enhancing the fatigue life and damage tolerance.

This application provides a method, apparatus, equipment, and medium for calculating the temperature rise of an energy storage cabinet under sunlight exposure. The method includes: acquiring dynamic parameters of the environment in which the energy storage cabinet is located; determining the total irradiance of the inclined surface of the energy storage cabinet based on the dynamic parameters; correcting the external air convection heat transfer coefficient based on the heat exchange power under a preset standard test condition; determining and correcting the heat transfer coefficient based on the internal convection heat transfer coefficient, the external air convection heat transfer coefficient, the thickness difference between the inside and outside of the energy storage cabinet, and the comprehensive thermal conductivity of the inside and outside of the cabinet; determining the total heat generation power of the six sides of the energy storage cabinet based on the area, heat transfer coefficient, and heat transfer correction coefficient of the six sides of the energy storage cabinet; and determining the temperature rise of the energy storage cabinet based on the relative specific heat capacity, relative mass, heat generation power, sunlight exposure time, and the specific heat capacity correction parameter of the energy storage cabinet. This technical solution combines heat transfer and thermodynamics to derive the calculation process for calculating the temperature rise of an energy storage cabinet under sunlight exposure.

The invention belongs to the technical field of thermal design and thermal management of motors, and relates to a three-dimensional temperature field detection method for a stator through-pipe water-cooled multiphase permanent magnet motor. Firstly, a motor electromagnetic loss model is established, stator iron loss, winding copper loss, pipe penetrating additional loss, permanent magnet eddy current loss and the like are obtained to serve as heat sources, and heat source input processing is conducted; establishing a winding copper-insulation equivalent thermal model and an end winding convection thermal resistance model; then, dividing the stator yoke part into a pipe-penetrating part and a pipe-penetrating-free part, constructing equivalent thermal resistance comprising pipe wall conduction, contact conduction and convection in the pipe, calculating a convection heat transfer coefficient in the pipe based on a Reynolds number and a Nusselt number, and establishing a three-dimensional equivalent thermal network model on the basis of a special equivalent thermal network; and finally, establishing a heat balance equation to solve the node temperature and outputting the temperature of the key part of the temperature field. The overall design principle is scientific, the detection system is reliable in operation, the calculation method is simple, the calculation result is accurate, and the application environment is friendly.