5results about How to "Strong structural design" patented technology

The application discloses a fibrous nitrogen-doped carbon metal mesh composite membrane for water treatment, which utilizes a metal mesh as a base film and a metal source, uses amino acids as a nitrogen source and a carbon source, and forms a stable nitrogen-doped carbon layer through a calcination process and uniformly distributes the nitrogen-doped carbon layer on the surface of the metal mesh. The application utilizes abundant amino and carboxyl functional groups in amino acid molecules, forms a stable chemical chelate structure with metal ions of the metal mesh base through coordination bonding, and effectively enhances the interfacial bonding strength between the nitrogen-doped carbon and the metal mesh base film in the carbonization process through the bonding mechanism at the molecular level.

This invention discloses an inorganic multimetallic hydroxide@organic material core-shell structure explosion suppression material, belonging to the field of explosive safety protection technology. The explosion suppression material comprises a core layer and an outer shell layer; the core layer is an inorganic suppression phase with a multimetallic hydroxide framework and variable-valence metal centers, while the outer shell layer is an organic material shell layer with controllable softening temperature and thermal buffering capacity. The preparation method involves preparing multimetallic inorganic core layer powder using a co-precipitation method, and then coating the organic material onto the surface of the core particles using a melt-coating method. When applied to suppressing combustion and explosion accidents of solid propellants, the outer shell layer protects the particles from completely penetrating the flame layer and entering the combustion and explosion center region. Subsequently, it rapidly softens or destabilizes at high temperatures, releasing the core. Through multiple mechanisms such as heat absorption, capture of combustion free radicals, and formation of inert residue, it achieves rapid cooling and chemical suppression, effectively hindering combustion propagation and the transition from deflagration to detonation. Compared with existing explosion suppressants, this invention has a significant spatiotemporal synergistic explosion suppression effect and is suitable for the safety protection of high-energy solid propellants.

The invention discloses a mid-motor with an improved harmonic reducer, belongs to the technical field of motors, and mainly solves the problem that a harmonic reducer of an existing mid-motor is fixed in reduction ratio and cannot adapt to multiple working conditions. The motor comprises an end cover, a motor stator assembly, a motor rotor, a wave generator, a flexible gear, a rigid gear, an adjusting motor, a controller and the like, and is characterized in that the inner ring of a rigid gear ring is totally provided with 60 teeth, the number of fixed teeth and the number of telescopic teeth are equal, the fixed teeth and the telescopic teeth are alternately distributed, and the telescopic teeth are in transmission connection with a gear set through a rack bar; and the gear set is linked with an adjusting motor through a gear ring and a worm. When the adjusting motor is started, the telescopic teeth can be driven by the transmission link to stretch out and draw back in the tooth grooves, the meshing tooth number of the rigid gear and the flexible gear is changed, and therefore the reduction ratio of the harmonic reducer is flexibly adjusted. According to the invention, the motor outputs large torque during climbing and heavy load, the efficiency is improved during high-speed driving, the motor is suitable for various electric vehicles such as electric bicycles, the structure is stable, and the adaptability is high.

This invention discloses a graphene-coated silicon nanocomposite material, its preparation method, and its application, belonging to the field of battery materials technology. The preparation method of this composite material includes: firstly, removing the oxide layer on the surface of the silicon nanocomposite and performing plasma activation to obtain silicon nanocomposite with active sites and functional groups on the surface; dispersing it in a carbon source precursor solution, mixing it evenly, and then centrifuging and drying it at low temperature to obtain a silicon-coated precursor; under inert gas protection, carbonizing the silicon-coated precursor at 500-700℃ and simultaneously introducing it into a catalyst precursor, then introducing a carrier gas containing hydrogen and carbon, and heat-treating it at 800-950℃; finally, acid washing, water washing, and drying to obtain the target material. This invention achieves low-temperature controllable growth of graphene by optimizing process parameters. In the prepared core-shell composite material, 1-30 few-layer graphene shells are tightly bonded to the silicon nanocomposite core. When used as a negative electrode active material for lithium-ion batteries, it exhibits high specific capacity, excellent cycle stability, and rate performance. The process is easily scalable and has promising application prospects.