3results about How to "Reduced heat transfer capability" patented technology

The invention provides a supercritical carbon dioxide Brayton cycle system and a power generation host thereof, the power generation host is of an integrated structure, a power generation unit, a compression unit and a turbine unit are sequentially arranged in a shell, rotors of the power generation unit, the compression unit and the turbine unit are coaxial, the power generation unit, the compression unit and the turbine unit are located in different cavities in the shell, and the cavities where the power generation unit, the compression unit and the turbine unit are located are sealed and isolated. According to the supercritical carbon dioxide Brayton cycle system and the power generation main machine thereof, the advantages of the supercritical carbon dioxide Brayton cycle can be brought into full play, and the utilization mode and efficiency of distributed heat energy difficult to collect are flexibly improved in a multi-purpose mode. According to the power generation host, a power generation unit, a compression unit and a turbine unit are integrally designed and are jointly arranged in the same shell; therefore, compared with static sealing only needed by the outside, the overall sealing performance is improved.

The invention discloses a piezoelectric film pressure sensor suitable for different temperatures, which comprises an upper thermal insulation layer, an upper heating layer, a piezoelectric material film layer, a lower heating layer and a lower thermal insulation layer which are sequentially stacked from top to bottom, and is characterized in that the piezoelectric material film layer is packaged between the upper heating layer and the lower heating layer and leads out piezoelectric signals through a signal line; the upper heat preservation layer and the lower heat preservation layer are each composed of a hard supporting framework and a flexible heat insulation filling material, the hard supporting frameworks are hollowed-out grid supporting frames, the thickness of the hard supporting frameworks is equal to the thickness of the upper heat preservation layer and the thickness of the lower heat preservation layer, and grids of the hard supporting frameworks are filled with the flexible heat insulation filling materials. By arranging the thermal insulation layer, the problem that the piezoelectric film pressure sensor is influenced by external temperature is solved, and the accuracy of piezoelectric data acquisition is improved while the sensitivity of the piezoelectric film pressure sensor is ensured.

This utility model discloses a stator blade machining milling cutter with convenient heat dissipation, relating to the field of milling cutter technology. It includes a tool holder with a machining head fixed to its bottom end. The machining head has a cooling assembly inside, comprising an annular sleeve rotatably connected to the curved outer wall of the tool holder, with a connecting pipe on one side of the annular sleeve. This utility model utilizes coolant flowing in an annular groove to cool the machining head, extending its service life. Simultaneously, the coolant is sprayed out from a cooling groove at the rear end of the tool holder, further improving the cooling effect and reducing heat transfer between the tool holder and the machining head. This rapidly removes cutting heat, preventing dimensional deviations caused by softening or thermal deformation of the blade material due to high temperatures, thus improving the blade's profile accuracy. Furthermore, the coolant sprayed from the cooling groove can directionally flush away chips, preventing long chips from entangled in the machining head and reducing scratches on the blade surface during machining.