CN-122028283-A - Electrode assembly for static eliminator and optimization method thereof

CN122028283ACN 122028283 ACN122028283 ACN 122028283ACN-122028283-A

Abstract

An electrode assembly for static eliminator and an optimization method thereof belong to the field of static elimination. The electrostatic eliminator comprises a discharge electrode seat, a discharge electrode, a tubular discharge electrode and a spring plug, wherein the spring plug is a rod-shaped structural member, the front end of the rod-shaped structural member of the spring plug is inserted into the tubular discharge electrode, the rear end of the spring plug is electrically connected with a high-voltage component in the electrostatic eliminator rod body, the tubular discharge electrode and the spring plug are arranged through the discharge electrode seat, and the tubular discharge electrode, the spring plug and the discharge electrode seat integrally form a discharge electrode assembly. The tubular discharge electrode structure is adopted, so that the discharge area of the front end part of the discharge electrode is greatly increased, the tangential electric field intensity of the surface of the direct current ion rod body is greatly reduced by optimizing the discharge electrode assembly structure on the basis of considering the discharge electric field intensity of the discharge electrode, the migration of the surface charge of the direct current ion rod body is reduced, the surface flashover between two adjacent positive and negative discharge electrodes can be effectively inhibited, and the surface insulation performance of the direct current ion rod is further enhanced.

Inventors

SUN WEIXING
LI PENG
YANG QINGRUI

Assignees

上海安平静电科技有限公司

Dates

Publication Date: 20260512
Application Date: 20241108

Claims (10)

1. An electrode assembly for a static eliminator comprising a discharge electrode mount and a discharge electrode, characterized by: providing a tubular discharge electrode and a spring insert; the spring plug-in is a rod-shaped structural member; The front end of the spring insert rod-shaped structural member is inserted into the tubular discharge electrode; The rear end of the spring plug-in is electrically connected with a high-voltage component in the static eliminator rod body; The tubular discharge electrode and the spring plug-in unit penetrate through the discharge electrode seat; the tubular discharge electrode, the spring plug and the discharge electrode seat integrally form a discharge electrode assembly.
2. The electrode assembly for a static eliminator of claim 1, wherein the tubular discharge electrode and the spring insert are disposed through an axial center of the discharge electrode holder.
3. The electrode assembly for a static eliminator as claimed in claim 1, wherein a boss is provided at the middle rear portion of the spring insert, dividing the rod-shaped structural member into a column of a front half and a spring pin of a rear half; The cylinder is inserted into the rear end of the tubular discharge electrode, and the cylinder and the tubular discharge electrode are in interference fit; the spring thimble is electrically connected with the high-voltage component in the static eliminator rod body.
4. An electrode assembly for a static eliminator as claimed in claim 3, wherein said boss forms an interposed locating/limiting structure between the spring insert and the tubular discharge electrode and between the tubular discharge electrode and the discharge electrode holder.
5. The electrode assembly for a static eliminator as claimed in claim 1, wherein the tubular discharge electrode has a wall thickness ranging in value from: 0.01mm≤h Wall thickness ≤1mm; the numerical range of the outer diameter of the tubular discharge electrode is as follows: 1mm≤d Outer diameter of ≤10mm。
6. The electrode assembly for a static eliminator of claim 1, wherein the discharge electrode assembly is fixedly mounted to the rod core surface structure of the dc ion rod.
7. The electrode assembly for the static eliminator as claimed in claim 1, wherein the electrode assembly for the static eliminator is characterized in that a tubular discharge electrode structure is adopted to increase the discharge area of the tip of the electrode needle, and the tangential electric field intensity of the surface of the direct current ion rod body is reduced on the basis of considering the discharge electric field intensity and the ion discharge capacity of the discharge electrode, thereby reducing the charge migration of the surface of the rod body, effectively inhibiting the surface flashover between two adjacent positive and negative discharge electrodes, and further enhancing the insulation performance of the surface of the direct current ion rod body.
8. A method of optimizing an electrode assembly for a static electricity eliminator as claimed in claim 1, characterized by comprising at least the steps of: 1) Constructing a simulation structure model of the needle type discharge electrode assembly and the tubular discharge electrode assembly; 2) Respectively applying an electrostatic field mathematical model for the whole simulation space; 3) Performing grid division for the simulation domain of the needle discharge electrode assembly, and executing simulation operation; 4) Obtaining tangential electric field intensity of the surface of a rod body where a discharge electrode of the needle type discharge electrode assembly is positioned and electric field intensity of the tip end of the discharge electrode; 5) Taking the outer diameter and the wall thickness of the tubular discharge electrode as optimization variables, and respectively setting the upper limit value and the lower limit value of the optimization variables; 6) Taking the tangential electric field intensity of the surface of the rod body where the needle type discharge electrode assembly and the tubular discharge electrode are positioned and the electric field intensity of the tip end of the discharge electrode as judging technical parameters, and setting an optimization objective function by utilizing the judging technical parameters; 7) Adopting a Nelder-Mead method to carry out optimization solution on the objective function; 8) Performing grid division on a simulation domain of the tubular discharge electrode, and performing simulation operation to obtain optimal parameter values of the outer diameter and the wall thickness of the tubular discharge electrode, and tangential electric field intensity of the surface of a rod body where the corresponding discharge electrode is positioned and electric field intensity of the tip of the discharge electrode; 9) And comparing and analyzing the technical characteristics of tangential electric field intensity of the surface of the rod body where the needle type discharge electrode assembly and the tubular discharge electrode are positioned and electric field intensity of the tip of the discharge electrode, and determining the technical effect of adopting the tubular discharge electrode.
9. The method of optimizing an electrode assembly for an electrostatic eliminator according to claim 8, wherein in step 1), the simulation structural models of the needle discharge electrode assembly and the tubular discharge electrode assembly employ the same positive and negative electrode pitches, the same bar body surface layer structure; when the simulation structure model is constructed, only a pair of rod surface layer structures between the positive electrode and the negative electrode are constructed; In step 2), the mathematical model of the electrostatic field is: Wherein V is electrode voltage, unit V, epsilon 0 is vacuum dielectric constant, epsilon 0 ＝8.854187817×10 -12 F/m, unit F/m, epsilon r is relative dielectric constant of material, and has no dimension, positive and negative electrode voltages are respectively set to be +20kV and-20 kV; the calculation formula of the minimum value of the objective function is as follows: In the above formula, E AVG Discharge tip : Round tube is the average electric field intensity (unit: V/m) of the surface of the discharge tip of the tubular discharge electrode, E AVG is the average electric field intensity (unit: V/m) of the surface of the discharge tip of the needle discharge electrode, MAX (E tx: Round tube I) is the maximum value (unit: V/m) of the absolute value of the tangential electric field intensity of the surface of the rod body where the tubular discharge electrode is located, MAX (E tx: Conical cone ) is the maximum value (unit: V/m) of the absolute value of the tangential electric field intensity of the surface of the rod body where the needle discharge electrode is located, d Outer diameter of is the outer diameter (unit: mm) of the tubular discharge electrode, and h Wall thickness is the wall thickness (unit: mm) of the tubular discharge electrode.
10. The method for optimizing an electrode assembly for an electrostatic eliminator according to claim 8, wherein the method for optimizing reduces the tangential electric field intensity of the surface of the rod body of the direct current ion rod by adopting the tubular electrode assembly, reduces the migration of charges on the surface of the rod body, effectively inhibits the surface flashover between the positive and negative discharge electrodes, enhances the insulating property of the surface of the direct current ion rod, and simultaneously gives consideration to the discharge property thereof and ensures the power elimination capability of the ion rod.

Description

Electrode assembly for static eliminator and optimization method thereof Technical Field The invention belongs to the field of static electricity elimination, and particularly relates to an electrode assembly for a static electricity eliminator and an optimization method thereof. Background Ion rods are one of the most commonly used product designs for static eliminators, which are widely used in the field of static control in industrial processes. The direct current ion rod has the characteristics of high ion generation efficiency, long acting distance and strong power elimination capability, and is applied to a high static electricity generation place. However, because of the working characteristics of the direct current ion rod (abbreviated as an ion rod) and the requirement of high static electricity eliminating capability, the working voltage is high (the voltage applied by the discharge electrodes is high), and a plurality of positive discharge electrodes and negative discharge electrodes are arranged at intervals (namely, each positive discharge electrode and each negative discharge electrode are adjacently arranged), the surface flashover (surface insulation breakdown) between the positive discharge electrode and the negative discharge electrode on the surface of the direct current ion rod (abbreviated as the surface of the rod) is very easy to occur, and the ion rod is damaged. The discharge electrode assembly (also called electrode needle assembly) is an important electrical structural component of the direct current ion rod, and high voltage loaded on the discharge electrode is exposed outside due to the discharge work requirement, so that a tangential electric field is formed on the surface of the rod body between the positive discharge electrode and the negative discharge electrode of the direct current ion rod, and the tangential electric field is one of important reasons for causing the surface flashover of the surface of the rod body. Because of the limitation of extrusion molding process, the optimization design of the surface insulation structure of the rod core (body) has larger limitation, and the structure of the discharge electrode assembly adopts the mechanical processing and injection molding process, so the space for the optimization design of the surface insulation structure of the discharge electrode assembly is larger. The prior discharge electrode assembly is generally classified into a first type represented by an electrode assembly for a static eliminator disclosed in an utility model patent having an issue date of 2016.03.02 and an issue number of CN 103716975B, in which the electrode and/or the metal member of the electrode assembly is not in direct contact with the rod core (body) or the surface of the rod body (surface for short) of the dc ion rod, and a second type represented by an electrode needle assembly for a static eliminator disclosed in an utility model patent having an issue date of 2023.08.25 and an issue number of CN 219592680U, in which the electrode and/or the metal member is in direct contact with the rod core (body) or the surface of the rod body of the dc ion rod. Both of these two types of discharge electrode assemblies employ a needle structure having a tip (also referred to as a tip) with a conical tip and a smaller radial diameter, and the mechanical parameters of such needles are typically as follows: 1) Electrode diameter is typically 0.5 to 2mm; 2) The length of the electrode is more than 10mm; 3) The angle of the grinding tip (also called the angle of the grinding cone) is 0 to 70 degrees. The prior technical proposal has the following technical defects: Because the electrode needle structure with the front end in a conical shape and smaller diameter is adopted, and the voltage applied by the direct current ion rod to the electrode needle is higher, the generated surface tangential electric field is larger, the migration of the surface charge of the direct current ion rod body is easy to occur, the surface flashover between the positive electrode and the negative electrode is further generated, the surface insulation breakdown is caused, and the electricity eliminating performance is reduced. For example, the electrode needle and/or the metal fixing piece of the electrode assembly are/is directly contacted with the direct current ion rod core (body) or the surface of the direct current ion rod, the generated surface tangential electric field becomes larger, migration of surface charges of the rod is more easily caused, strong surface flashover between the positive electrode and the negative electrode is initiated, surface insulation breakdown is caused, the electricity eliminating performance is reduced, and even the electricity eliminating capability is lost. Because the cylindrical (also called rod-shaped or bar-shaped) electrode needle structure with the conical front end and smaller radial diameter is adopted, and the voltage applied by the dir