CN-122028284-A - Needle seat structure for reducing particle pollution of electrode needle of electric eliminator and verification method thereof

CN122028284ACN 122028284 ACN122028284 ACN 122028284ACN-122028284-A

Abstract

A needle seat structure for reducing the particle pollution of an electrode needle of a power eliminator and a verification method thereof belong to the field of static electricity elimination. The electrode needle is arranged on the electrode needle mounting part, a cylindrical boss is arranged on the top of the cylindrical electrode needle mounting part, an electric connection fixing part with an inverted cylindrical structure is arranged, the electrode needle is positioned at the center of the shaft and penetrates through the whole electrode needle mounting part, the tail part of the electrode needle is higher than the cylindrical boss on the top of the electrode needle mounting part, the electrode needle mounting part and the electric connection fixing part are fixed together and are integrally in a cylindrical structure, an air passage component which is matched with the electrode needle mounting part and is used for forming an air passage is arranged, the air passage component is in an axisymmetric structure and is coaxially arranged on a rod core of an ion rod, and a circular tube-shaped air passage structure is formed between the air passage component and the electrode needle mounting part. The circular tube-shaped air passage structure which takes the axial center line of the whole electrode needle seat as the axial center line, is non-contacted with the electrode needle body and indirectly surrounds the whole electrode needle is arranged, and a circular tube-shaped jet flow is formed around the electrode needle and the needle cone part thereof so as to reduce the adsorption probability of polluted particles, enlarge the protection space of the electrode needle and the needle cone part thereof and finally improve the electrostatic protection capability on electrostatic sensitive articles.

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: 20241111

Claims (10)

1. A needle seat structure for reducing the particle pollution of an electrode needle of a power eliminator comprises an electrode needle and is characterized in that: A cylindrical electrode needle mounting piece fixedly connected with the electrode needle is arranged; a cylindrical boss is arranged on the top of the cylindrical electrode needle mounting piece; Arranging an electric connection fixing piece with an inverted cylindrical structure; The electrode needle is positioned at the center of the shaft and penetrates through the whole electrode needle mounting piece, and the tail part of the electrode needle is higher than a cylindrical boss at the top of the electrode needle mounting piece; the electrode needle mounting piece and the electric connection fixing piece are fixed together and are of a cylindrical structure as a whole; an air passage component matched with the electrode needle mounting piece and used for forming an air passage is arranged; The air passage component is in an axisymmetric structure, is coaxially arranged on the rod core of the ion rod with the electrode needle mounting piece, and forms a circular tube-shaped air passage structure between the air passage component and the electrode needle mounting piece; The needle seat structure for reducing the pollution of the particles of the electrode needle of the electric eliminator is characterized in that a circular tube-shaped air passage structure which takes the axial center line of the whole electrode needle seat as the axial center line, is non-contacted with the electrode needle body and indirectly surrounds the whole electrode needle is arranged, and a circular tube-shaped jet flow is formed around the electrode needle and the needle cone part of the electrode needle, so that the adsorption probability of the pollution particles is reduced, the protection space of the electrode needle and the needle cone part of the electrode needle is enlarged, and finally the electrostatic protection capability on electrostatic sensitive articles is improved.
2. The needle stand structure for reducing the particulate pollution of the electrode needle of the electric eliminator according to claim 1, wherein the side surface of the cylindrical boss is provided with external threads; an internal thread is arranged on the inner side of the cylinder wall of the inverted cylinder-shaped electric connection fixing piece; the electrode needle mounting piece and the electric connection fixing piece are fixed together in a screwed mode through a threaded connection part, and the whole electrode needle mounting piece and the electric connection fixing piece are of a cylindrical structure.
3. The needle mount structure for reducing particulate contamination of a consumable electrode needle of claim 1, wherein an opening is provided in a top center of the electrical connection holder.
4. The needle stand structure for reducing particulate pollution of an electrode needle of an electric eliminator according to claim 1, wherein the electric connection fixing member is fixedly installed with the high-voltage component in the ion rod core through a spring thimble, and simultaneously, the tail part of the electrode needle is electrically connected with the high-voltage component in the ion rod core through the spring thimble.
5. The needle mount structure for reducing particulate contamination of a power eliminator electrode needle of claim 4 wherein the high voltage component comprises a high voltage circuit board.
6. The needle stand structure for reducing particulate pollution of an electrode needle of an electric eliminator according to claim 1, wherein the tail part of the electrode needle is higher than a cylindrical boss at the top of the mounting member so as to be in electrical contact with the spring thimble, and the tail part of the electrode needle can be electrically connected with a high-voltage component in the ion rod core through the spring thimble.
7. The needle seat structure for reducing the pollution of the particles of the electrode needle of the electric eliminator according to claim 1, wherein the jet flow formed by the circular pipe type air passage forms a small area vortex near the needle cone of the electrode needle, and the vortex can drive positive ions and negative ions ionized at the tip of the electrode needle to do rotary motion so as to play a role of mixing and stirring, so that the spatial distribution of the positive ions and the negative ions becomes more uniform, and then the positive ions and the negative ions are conveyed to the surface of an object, thereby being capable of reducing the fluctuation of the balance of the positive ions and the negative ions and being beneficial to the protection of static sensitive objects.
8. A method of verifying the needle mount structure of claim 1, wherein: 1) Respectively constructing a cylindrical electrode needle seat and a tubular airway electrode needle seat simulation test structure model; 2) For the structures of the cylindrical electrode needle seat and the circular tube type airway electrode needle seat, an airway formed by the electrode needle seat and a set flowing space are respectively applied with Realizable k-epsilon turbulence mathematical model; 3) Applying an electrostatic field mathematical model for the electrode needle seat and the set flowing space; 4) Grid division is carried out on the whole simulation domain, simulation operation is carried out, and flow field and electric field distribution of the air passage and the set flow space are obtained; 5) Applying an electric field and a mathematical model of charged particle motion in a flow field aiming at an air passage and a set flow space, wherein the field condition and the boundary condition of the charged particle motion are used for speed field and electric field distribution, and the simulation result of the charged particle motion characteristic is obtained by performing simulation operation based on data obtained by simulation of the air passage and the flow field in the set flow space; 6) Analyzing and comparing flow field characteristics, particle motion characteristics and particle adsorption probability of the electrode needle and the needle cone presented by the electrode needle seat structures with different airway structures, and determining the superiority of the circular tube type airway electrode needle seat structure through the analysis of the flow field characteristics near the electrode needle and the particle adsorption probability of the electrode needle and the needle cone.
9. The method of verifying the structure of a needle holder as defined in claim 8, wherein in said step 2), the jet field formed by the electrode needle holder after being supplied with compressed air is described by using Realizable k-epsilon turbulence model: momentum continuity equation -Mass continuity equation -Viscous force tensor -Turbulent kinetic energy equation -Turbulent energy generating item Turbulent viscosity -Turbulent dissipation equation In the step 3), an electrostatic field mathematical model is applied to the electrode needle seat, the electrode needle and the set flow space as follows: D=ε 0 ε r E in said step 5), a standard drag-related model is used to simulate drag forces experienced by particles in the flow field: C D ＝f(Re r )
10. The method of validating a needle hub structure of claim 9, wherein in said step 5), the force equation of the charged particles in said ionic wind stick fluid field is: Wherein m p is the mass of the particles, q is the spatial position vector of the particles, and F e is the electric field force to which the charged particles are subjected.

Description

Needle seat structure for reducing particle pollution of electrode needle of electric eliminator and verification method thereof Technical Field The invention belongs to the field of active static elimination, and particularly relates to an electrode needle seat for forming an ionization static eliminator. Background The air source type ionization static eliminator, in particular to an ion wind rod, is widely applied to the field of electronic industry and plays an important role in the static protection in the electronic process. However, with the use of a large number of electronic components which are more sensitive to static electricity, the requirements of the electronic process on static electricity protection are more and more strict, and thus, higher requirements are put on the electricity eliminating performance of the ion wind rod. One of the important external environmental factors affecting the de-electrification performance of the ion wind rod is the adsorption of the electrode to dust (particles), which has negative important effects on the de-electrification speed and ion balance, and how to reduce the adsorption of the electrode to dust (particles) in the environment is one of the important research contents for maintaining the de-electrification performance of the ion wind rod. In the prior art, the ion wind bars all adopt electrode needle seat (component) structures to realize the fixation of electrode needles and the output of compressed air flow. For example, patent publication number CN 211831302U, the utility model patent publication number 2020.10.30 discloses a discharge electrode assembly for ion rod, which comprises a discharge electrode, an electrode sleeve and an electrode holder, wherein the discharge electrode is sleeved with the electrode sleeve, the head end of the electrode sleeve is connected with the electrode holder, the tail end of the electrode sleeve is connected with a circuit board in the ion rod, an air passage is arranged in the electrode holder, the longitudinal axis of the discharge electrode coincides with the longitudinal axis of the air passage, the air passage comprises an air inlet section, a mixing section, a contraction section, a throat opening and an expansion section which are sequentially connected, the tail end of the expansion section forms an air passage outlet of the electrode holder, and the air passage outlet is of a horn-shaped opening structure. The output states of ionized air flow are improved by optimizing the air inlet structure, the air passage structure and the air outlet structure, so that the output air quantity of each discharge electrode assembly on the ion rod along the length direction is uniform, the air flow motion states on the two sides of the ion rod in the horizontal direction are consistent on the same vertical test distance, more balanced and faster static electricity eliminating effects can be obtained, and a larger electricity eliminating range of angles can be obtained. Specifically, the most important characteristic in the prior art is that the electrode needle is arranged in the air passage positioned at the center of the electrode needle seat shaft so as to realize the wrapping (cladding) of the electrode needle by air flow and reduce the dust adsorption effect. However, in practical application, the following technical defects exist in the prior art scheme: 1) In the prior art, a cylinder type air passage structure (called a cylinder type air passage for short) is arranged at the center of an electrode needle seat shaft, and because the air flow is jet flow, the air flow introduced from the periphery can be tightly adsorbed on the surface of an electrode needle (needle cone), and the space electric field intensity at the electrode needle (needle cone) is very high, so that charged dust (particles) in the surrounding air environment are easily adsorbed on the electrode needle (especially the needle cone part of the electrode needle), the discharge stability and the discharge intensity are influenced over time, the ion generation amount is further influenced, and the electricity eliminating performance is reduced. 2) The 'cylinder' air passage structure in the prior art is positioned at the center of the electrode needle seat shaft, and the air outlet flow is high-speed jet and tightly wraps the electrode needle, so that positive ions and negative ions ionized at the electrode needle are quickly conveyed to the surface of an object by the jet, larger fluctuation of positive and negative ion balance is easily caused, and the protection of static sensitive objects is not facilitated. How to avoid the adsorption of charged dust (particles) to the electrode needle as much as possible, reduce the adsorption probability of the needle cone part of the electrode needle to the polluted particles, reduce the performance influence of external pollutants on the needle cone part of the electrode needle, reduce the fluctuation of pos