7 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 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).

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 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.

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.