Device and method for measuring particle collision electrification according to particle motion track

Abstract

The invention discloses a device and a method for measuring particle collision electrification according to a particle motion track. The device consists of a high-voltage direct-current power supply,a ruler, a visual test box, a mechanical cantilever, an electrode plate, a collision flat plate, a high-speed camera and a vacuum pump. Two parallel electrode plates are arranged on the two sides of avacuum experiment box, one electrode plate is connected with a high-voltage power source, the other electrode plate is grounded, a uniform electric field is formed between the electrode plates through the high-voltage power source, and a flat plate is arranged at the bottom of the experiment box. Collision particles fixed in the mechanical cantilever fall into an electric field area between the electrode plates under the action of gravity and rebound to enter the electric field area again after colliding with the collision flat plate, and the motion tracks of the particles at the electrode plates are recorded through the high-speed camera. Under the action of horizontal electric field force in the uniform electric field, the particle track can deviate, the stress condition of the particles can be obtained by analyzing the movement track of the particles, and then the charged quantity of the particles can be obtained through calculation.

Description

technical field [0001] The invention belongs to the field of gas-solid two-phase flow solid particle collision electrification, and relates to a technology for measuring static electricity generated by particle collision with a wall surface according to the particle movement track. Background technique [0002] Particle electrification is a ubiquitous phenomenon in industrial production processes. In the process of particle crushing, screening, granulation and transportation, due to the violent collision and friction between particles and between particles and walls, the charging phenomenon of particles is very obvious. [0003] In the process of particle transmission, the generation and accumulation of static electricity will be quite harmful to industrial production. A large amount of particle static electricity will accumulate, resulting in agglomeration and wall sticking, and even electrostatic discharge, causing serious accidents such as fire and explosion. With the ra...

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a kind of electrified collision device and collision test method according to particle trajectory according to above-mentioned deficiency; Solve the defect of Faraday cup method measurement

Images