Pneumatic filling method and system for powder particles

Abstract

The invention discloses a pneumatic filling system for powder particles. The pneumatic filling system comprises a storage box, a gas cylinder and a powder box; the storage box is a cylindrical body; the front end of the storage box is in the shape of a cone; a piston is coaxially sleeved with the storage box; the inside of the storage box is divided in the axial direction from front to back into afluidization cavity and a driving cavity which are arranged independently; a powder outlet is formed in the front end of the fluidization cavity and is in pipeline connection with the powder box; thecone at the front end of the fluidization cavity and the back end of the driving cavity are in pipeline connection with the gas cylinder; the driving cavity and the fluidization cavity are filled with gas inside the gas cylinder; the gas entering the driving cavity drives the piston to push the powder particles inside the fluidization cavity to move forwards, and meanwhile, the powder particles is fluidized in the gas by the aid of the gas entering the fluidization cavity, so that the gas-solid two-phase gas flow is formed and flows into the powder box via the powder outlet. Safe powder supply to the fuel powder box is realized, and the filling rate of the powder box is up to 97%.

Description

technical field [0001] The invention belongs to the technical field of powder engines, and in particular relates to a powder particle pneumatic filling method and system. Background technique [0002] The powder engine is a new type of engine that uses tiny powder particles as fuel, and has the functions of multiple starts and thrust adjustment. Powder fuel filling is an important link in the process of powder rocket engine experiment organization, and its purpose is to deliver the powder fuel stored on the ground to the powder engine storage tank according to demand. Compared with liquid, powdered fuel has poor fluidity, difficult transportation, and more complicated filling process. At the same time, powdered fuel has a small particle size, is flammable and explosive, and has high requirements for filling safety. [0003] In the industrial field, powder particle feeding methods can generally be divided into gravity filling, mechanical filling and pneumatic filling. Gravi...

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Problems solved by technology

[0004] Powdered fuel is flammable and explosive, so it cannot collide violently with the moving parts of the filling device during the filling process. At the same time, due to the small particle size of the powdered fuel, it is easy to escape the powder box following the airflow, which will not only cause waste of powdered fuel , reduce the loading efficiency, and also cause environmental pollution. When the concentration of powder fuel in the environment is high, there may also be a problem of dust explosion

Therefore, the existing powder particle filling methods cannot meet the requirements of high-efficiency and high-safety filling of powder engines

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