2results about How to "Eliminate Directionality" patented technology

The utility model relates to the technical field of muffler, concretely relates to a small hole and sound flow combined muffler, including outer cylinder, bottom closing plate, blowoff pipe, muffler, oval punching head, cylinder inner flow divider and export flow divider, bottom closing plate and outer cylinder fixed connection, blowoff pipe and bottom closing plate fixed connection, muffler and bottom closing plate fixed connection, oval punching head and muffler fixed connection, cylinder inner flow divider sets up in the middle section of outer cylinder, export flow divider sets up in the top of outer cylinder, export flow divider includes two first steel sheet and steel wire mesh, two first steel sheet and outer cylinder fixed connection, steel wire mesh and two first steel sheet fixed connection, through above -mentioned structure's setting, solved the prior art, when handling high -pressure gas of large flow, the airflow distribution in the muffler is often uneven, leads to the noise reduction effect of some areas to be poor, gas drift phenomenon is serious, and further produces the problem of greater noise and vibration.

This invention discloses the fabrication and device of a vertical array of boron nitride nanotubes. The fabrication method includes: uniformly mixing a catalyst and a boron source to prepare a precursor powder; weighing the precursor powder and placing it in a reaction boat; placing a substrate above the reaction boat and heating it, introducing an inert gas during the heating process; maintaining the temperature after reaching the growth temperature, turning off the inert gas and introducing a nitrogen source to grow the vertical array of boron nitride nanotubes; after growth, turning off the nitrogen source, cooling the furnace tube to room temperature under inert gas protection, and removing the sample. This invention features a simple process and convenient operation, and ensures sufficient contact between the boron and nitrogen sources during the fabrication process, improving product quality and achieving the fabrication of a high-density, highly oriented vertical array of boron nitride nanotubes.