Device and method for measuring charge generated by single-particle sliding friction

A sliding friction and measuring device technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problem of inability to truly reflect the friction and static electricity of the sliding surface, and achieve the effect of flexible layout, simple operation and convenient installation.

Active Publication Date: 2018-06-15
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the Faraday cup method measures the algebraic sum of the electrostatic quantities on all surfaces of the particles, the traditional method of using the final electrostatic quantity as the triboelectric charge cannot truly reflect the frictional static electricity brought by the sliding surface after friction

Method used

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  • Device and method for measuring charge generated by single-particle sliding friction
  • Device and method for measuring charge generated by single-particle sliding friction
  • Device and method for measuring charge generated by single-particle sliding friction

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Embodiment Construction

[0032] The present invention will be further explained below in conjunction with the embodiments and the accompanying drawings.

[0033] The basic idea of ​​the invention is to use a general-type Faraday cup in combination with a Faraday cup to accurately measure the frictional charge of sample particles.

[0034] Such as figure 1 As shown, the single-particle sliding friction charging measuring device includes a base 1, a support 2 vertically installed on the base 1, a supporting plate 4 connected to the support 2 through a knob 3, and a slideway 5 of PVC material with a length of 50 cm; It also includes a general-type Faraday cup 6, a Faraday cup 7, an electrometer 9, and a computer 12; the electrometer 9 and the computer 12 are connected through a data transmission line 11;

[0035] The general type Faraday cup 6 is made up of two coaxial stainless steel circular tubes: an outer tube 61 and an inner tube 62; as figure 2 , image 3 As shown, the outer tube 61 and the inn...

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Abstract

The invention discloses a device and a method for measuring the charge generated by single-particle sliding friction. The method comprises the following steps: a base, a bracket, a knob and a supportplate are used to set up a sloping slide way; a general Faraday cup and a Faraday cup are connected with an electrometer; the guide section of the slide way measures the initial electrostatic charge of a sample particle through the general Faraday cup; the Faraday cup is placed below the end of the effective friction section of the slide way to measure the final electrostatic charge of the particle; and the amount of electrostatic charge generated by sliding friction between the sample particle and the slide way is accurately calculated by subtracting the initial electrostatic charge from thefinal electrostatic charge. The general Faraday cup and the Faraday cup are combined for the first time in the measurement of charge generated by single-particle friction. The general Faraday cup andthe Faraday cup can simultaneously measure the initial electrostatic charge and the final electrostatic charge. The measurement precision of charge generated by friction is improved. The device and the method are suitable for precisely analyzing the charge generated by friction between particles and the wall.

Description

technical field [0001] The invention belongs to the field of friction electrification of granular materials, and in particular relates to a measurement technology of single particle sliding friction electrification. Background technique [0002] Pellets are an important industrial raw material for a wide range of applications, including chemical, energy, pharmaceutical, food and mineral transportation. In the process of particle crushing, screening, granulation and transportation, frequent friction and collision between solid particles and pipes or containers will inevitably generate a large amount of static electricity. The electrostatic aggregation of particles will form an electric field, which will affect each charged particle, affect the movement shape of the particles, and thus affect the quality of the product; it may even cause electric sparks, fire or explosion hazards caused by discharge. For example, in the production process of gas-phase fluidized bed polyethyle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/24
CPCG01R29/24
Inventor 梁财胡驾纬周群陈晓平吴新刘道银段伦博
Owner SOUTHEAST UNIV
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