2results about How to "Improve propulsion performance" patented technology

The utility model relates to the technical field of injection molding screws, and discloses a screw with an anti-backflow structure, which comprises an injection molding pipe and an extrusion rod arranged on the inner wall of the injection molding pipe and used for extruding injection molding materials, and further comprises a feeding pipe fixedly connected to the outer wall of the injection molding pipe, the guiding device is used for guiding molten injection molding materials into the injection molding pipe; and the extrusion screw is arranged on the outer wall of the extrusion rod, is spirally arranged and extrudes the injection molding material in the injection molding pipe to move during rotation. The sealing screw and the sealing push block are arranged and matched with the extrusion screw, so that the interior of an injection molding pipe can be effectively sealed, a molten injection molding material is prevented from flowing reversely in the extrusion process, the extrusion effect is remarkably improved, the injection molding material can be smoothly pushed forwards, and the problem of non-uniform injection molding or blockage caused by reverse flow is solved.

A concentric annular plasma fuel activation device for the injector rod of a ramjet combustion chamber is provided, comprising a combustion chamber housing (1), an injector rod (2), a flame stabilizer (3), an outer ring low-pressure electrode (4), and an inner ring high-pressure electrode (5). The outer ring low-pressure electrode (4) consists of a circular outer ring body (6), an outer ring fixing rod (7), and an outer ring discharge contact (8). The inner ring high-pressure electrode (5) consists of an inner ring high-pressure terminal (9), an inner ring body (10), and an inner ring discharge contact (11). To achieve insulation between the inner ring high-pressure terminal (9) and the combustion chamber housing (1), a hollow cylindrical inner ring fixing sleeve (12) is designed. A method for activating concentric annular plasma fuel for the injector rod of a ramjet combustion chamber is also provided. This invention addresses the problems of difficult ignition and low combustion efficiency of ramjet combustion chambers under low operating conditions. This invention employs an innovative sliding arc plasma excitation device after the fuel injector rod in the ramjet combustion chamber, which can optimize the working performance of the ramjet combustion chamber over a wide range of incoming flow parameters without the need for an external geometrically adjustable mechanism.