CN109003800A - Production process for coating graphene on surface of magnet - Google Patents
Production process for coating graphene on surface of magnet Download PDFInfo
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- CN109003800A CN109003800A CN201810806129.XA CN201810806129A CN109003800A CN 109003800 A CN109003800 A CN 109003800A CN 201810806129 A CN201810806129 A CN 201810806129A CN 109003800 A CN109003800 A CN 109003800A
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- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 70
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 238000000576 coating method Methods 0.000 title claims abstract description 58
- 239000011248 coating agent Substances 0.000 title claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000005507 spraying Methods 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000007921 spray Substances 0.000 claims abstract description 11
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract 15
- 230000005611 electricity Effects 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 claims 8
- 238000010521 absorption reaction Methods 0.000 claims 6
- 238000007711 solidification Methods 0.000 claims 2
- 230000008023 solidification Effects 0.000 claims 2
- 240000002853 Nelumbo nucifera Species 0.000 claims 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims 1
- 230000035699 permeability Effects 0.000 claims 1
- 230000005347 demagnetization Effects 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 abstract description 2
- 229910002804 graphite Inorganic materials 0.000 abstract 1
- 239000010439 graphite Substances 0.000 abstract 1
- -1 graphite alkene Chemical class 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 description 17
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000003973 paint Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000652 homosexual effect Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/026—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets protecting methods against environmental influences, e.g. oxygen, by surface treatment
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- Environmental & Geological Engineering (AREA)
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- Carbon And Carbon Compounds (AREA)
Abstract
Description
技术领域technical field
本发明涉及磁铁制造技术领域，尤其公开了一种磁铁表面涂覆石墨烯的生产工艺。The invention relates to the technical field of magnet manufacturing, and in particular discloses a production process for coating graphene on the surface of a magnet.
背景技术Background technique
磁铁是一种常用基本元件之一，在磁铁的制造过程中，先利用磁性材料(如含有铁、钴或镍的金属材料等)制成磁体，然后在对磁体进行充磁，从而将磁体制成磁铁。磁铁的使用环境多种多样，例如，实际使用时，磁铁往往需要用在高温环境中，但是现有技术中磁铁的耐高温性能较差，高温往往会使得磁铁发生退磁，致使磁铁不能正常使用，严重缩短了磁铁的使用寿命。Magnets are one of the basic components commonly used. In the manufacturing process of magnets, first use magnetic materials (such as metal materials containing iron, cobalt or nickel, etc.) to make magnets, and then magnetize the magnets to make the magnets into a magnet. Magnets are used in a variety of environments. For example, in actual use, magnets often need to be used in high-temperature environments, but the high-temperature resistance of magnets in the prior art is poor, and high temperatures often cause magnets to demagnetize, resulting in magnets that cannot be used normally. Seriously shorten the service life of the magnet.
发明内容Contents of the invention
为了克服现有技术中存在的缺点和不足，本发明的目的在于提供一种磁铁表面涂覆石墨烯的生产工艺，通过将石墨烯涂料涂覆在磁性体的外表面上，避免磁性体直接暴露在外界高温的使用环境中，使得磁性体充磁后形成的磁铁具有抗高温性能，避免因磁铁的使用环境温度过高而导致磁铁发生退磁，延长磁铁的使用寿命。In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a production process for coating graphene on the surface of magnets, by coating graphene coatings on the outer surface of magnetic bodies to avoid direct exposure of magnetic bodies In the use environment of high temperature outside, the magnet formed after the magnetization of the magnetic body has high temperature resistance, avoids the demagnetization of the magnet caused by the high temperature of the use environment of the magnet, and prolongs the service life of the magnet.
为实现上述目的，本发明的一种磁铁表面涂覆石墨烯的生产工艺，所述生产工艺包括：In order to achieve the above object, a kind of production process of magnet surface coating graphene of the present invention, described production process comprises:
提供磁性体，磁性体采用导磁材料制成；A magnetic body is provided, and the magnetic body is made of a magnetically conductive material;
提供石墨烯涂料，石墨烯涂料经由粘结剂及石墨烯粉混合而成；Provide graphene coating, which is made by mixing binder and graphene powder;
提供喷涂装置，喷涂装置将石墨烯涂料喷射至磁性体的外表面上。A spraying device is provided, and the spraying device sprays the graphene paint onto the outer surface of the magnetic body.
优选地，所述粘结剂为树脂粉，喷涂装置具有静电发生组件，静电发生组件使得磁性体与石墨烯涂料分别荷正电及荷负电。Preferably, the binder is resin powder, and the spraying device has an electrostatic generating component, which makes the magnetic body and the graphene coating be charged positively and negatively, respectively.
优选地，提供烘烤装置，烘烤装置用于烘烤喷涂装置喷涂后的磁性体，烘烤装置用于融化树脂粉以使得石墨烯涂料粘附在磁性体的外表面上。Preferably, a baking device is provided, the baking device is used for baking the magnetic body sprayed by the spraying device, and the baking device is used for melting the resin powder so that the graphene coating adheres to the outer surface of the magnetic body.
优选地，所述静电发生组件设有切换单元模块，切换单元模块用于切换磁性体与石墨烯涂料的荷电性。Preferably, the static electricity generating component is provided with a switching unit module, and the switching unit module is used to switch the chargeability of the magnetic body and the graphene coating.
优选地，提供固化装置，固化装置设置有容置腔、固化灯、风扇及均流板，容置腔用于容设喷涂装置喷涂后的磁性体，固化灯发出的光用于照射容置腔内所容设的磁性体，风扇吹出的风经由均流板均化之后吹至容置腔内的磁性体。Preferably, a curing device is provided, the curing device is provided with an accommodating cavity, a curing lamp, a fan and an equalizer plate, the accommodating cavity is used to accommodate the magnetic body sprayed by the spraying device, and the light emitted by the curing lamp is used to irradiate the accommodating cavity The magnetic body arranged inside, the wind blown by the fan is blown to the magnetic body in the accommodating cavity after being homogenized by the flow equalizer.
优选地，提供驱动装置，驱动装置包括架体、转动设置于架体的轴体、用于驱动轴体转动的驱动电机，轴体设有承载面、过气孔及吸附环孔，承载面用于承载磁性体，过气孔的一端与外界的泵气装置连通，过气孔的另一端与吸附环孔连通，吸附环孔自承载面凹设而成，承载面所承载的磁性体用于遮盖吸附环孔，吸附环孔用于吸附磁性体。Preferably, a driving device is provided, the driving device includes a frame body, a shaft body rotatably arranged on the frame body, a drive motor for driving the shaft body to rotate, the shaft body is provided with a bearing surface, air holes and adsorption ring holes, and the bearing surface is used for Carrying a magnetic body, one end of the air hole is connected to the external pumping device, and the other end of the air hole is connected to the adsorption ring hole. The adsorption ring hole is recessed from the bearing surface, and the magnetic body carried by the bearing surface is used to cover the adsorption ring. Hole, the hole of the adsorption ring is used to adsorb the magnetic body.
优选地，所述驱动装置还包括装设于轴体的固定盘，轴体设有与过气孔连通的盲槽，盲槽自承载面凹设而成，固定盘包括盘体及与盘体连接的柱体，柱体容设于过线孔内，盘体容设于盲槽内，盘体的外表面与盲槽的侧壁围设形成吸附环孔，柱体的外表面与过气孔的侧壁之间具有与吸附环孔连通的间隙。Preferably, the drive device further includes a fixed plate installed on the shaft body, the shaft body is provided with a blind groove communicating with the air hole, the blind groove is recessed from the bearing surface, the fixed plate includes a plate body and is connected with the plate body The cylindrical body, the cylindrical body is set in the line hole, the disc body is set in the blind groove, the outer surface of the disc body and the side wall of the blind groove are surrounded to form an adsorption ring hole, the outer surface of the cylindrical body and the air hole There is a gap between the side walls that communicates with the holes of the adsorption ring.
本发明的有益效果：通过将石墨烯涂料涂覆在磁性体的外表面上，避免磁性体直接暴露在外界高温的使用环境中，使得磁性体充磁后形成的磁铁具有抗高温性能，避免因磁铁的使用环境温度过高或装配过程中周边环境过高而导致磁铁的矫顽力下降所引起的退磁，延长磁铁的使用寿命。Beneficial effects of the present invention: by coating the outer surface of the magnetic body with the graphene coating, the magnetic body is prevented from being directly exposed to the high-temperature environment of the outside world, so that the magnet formed after the magnetic body is magnetized has high temperature resistance, and avoids The demagnetization caused by the decrease of the coercive force of the magnet caused by the high ambient temperature of the magnet or the high surrounding environment during the assembly process prolongs the service life of the magnet.
附图说明Description of drawings
图1为本发明的加工工艺的流程图；Fig. 1 is the flow chart of processing technique of the present invention;
图2为本发明的驱动装置的结构示意图；Fig. 2 is the structural representation of drive device of the present invention;
图3为本发明的轴体与固定盘组装后的俯视图；Fig. 3 is the top view of the assembly of the shaft body and the fixed disk of the present invention;
图4为本发明的轴体的俯视图；Fig. 4 is the plan view of shaft body of the present invention;
图5为本发明的固定盘的主视图；Fig. 5 is the front view of fixed plate of the present invention;
图6为本发明的固定盘的仰视图；Fig. 6 is the bottom view of the fixed plate of the present invention;
图7为本发明的磁性体涂覆石墨烯涂料后的剖视图。Fig. 7 is a cross-sectional view of the magnetic body of the present invention coated with graphene paint.
附图标记包括：Reference signs include:
1—驱动装置 2—架体 3—轴体1—Drive device 2—Frame body 3—Axis body
4—驱动电机 5—承载面 6—过气孔4—Drive motor 5—Loading surface 6—Air hole
7—吸附环孔 8—固定盘 9—盲槽7—Adsorption ring hole 8—Fixed plate 9—Blind groove
11—盘体 12—柱体 101—磁性体11—disc body 12—column body 101—magnetic body
102—石墨烯涂层。102—graphene coating.
具体实施方式Detailed ways
为了便于本领域技术人员的理解，下面结合实施例及附图对本发明作进一步的说明，实施方式提及的内容并非对本发明的限定。In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention.
请参阅图1和图7所示，本发明的一种磁铁表面涂覆石墨烯的生产工艺，所述生产工艺包括：Please refer to Fig. 1 and shown in Fig. 7, the production technique of a kind of magnet surface coating graphene of the present invention, described production technique comprises:
提供磁性体101，磁性体101采用导磁材料制成，根据实际需要，导磁材料可以为含有铁、钴或镍的材料，亦可以为含有钕铁硼的材料；A magnetic body 101 is provided, and the magnetic body 101 is made of a magnetically permeable material. According to actual needs, the magnetically permeable material can be a material containing iron, cobalt or nickel, or a material containing NdFeB;
提供石墨烯涂料，石墨烯涂料经由粘结剂及石墨烯粉混合而成，根据实际需要，石墨烯涂料可以为液态或固态，当石墨烯涂料为液态时，粘结剂为液态，石墨烯粉均匀混合在液态的粘结剂中；Provide graphene coating, graphene coating is mixed by binder and graphene powder, according to actual needs, graphene coating can be liquid or solid, when graphene coating is liquid, binder is liquid, graphene powder Evenly mixed in the liquid binder;
提供喷涂装置，喷涂装置用于将石墨烯涂料喷射至磁性体101的外表面上。A spraying device is provided for spraying the graphene paint onto the outer surface of the magnetic body 101 .
通过将石墨烯涂料涂覆在磁性体101的外表面上形成石墨烯涂层102，避免磁性体101直接暴露在外界高温的使用环境中，使得磁性体101充磁后形成的磁铁具有抗高温性能，避免因磁铁的使用环境温度过高或装配过程中周边环境过高而导致磁铁的矫顽力下降所引起的退磁，延长磁铁的使用寿命。By coating the graphene coating on the outer surface of the magnetic body 101 to form a graphene coating 102, the magnetic body 101 is prevented from being directly exposed to the high-temperature environment of the outside world, so that the magnet formed after the magnetic body 101 is magnetized has high temperature resistance , to avoid demagnetization caused by the decrease of the coercive force of the magnet due to the high ambient temperature of the magnet or the high surrounding environment during the assembly process, and prolong the service life of the magnet.
所述粘结剂为树脂粉，石墨烯涂料此时为固态，石墨烯涂料经由树脂粉与石墨烯粉混合制成，优选地，树脂粉、石墨烯粉的粒径均为1-10μm，利用外界的搅拌机将树脂粉与石墨烯粉搅拌混合均匀，进而制得石墨烯涂料；喷涂装置具有静电发生组件，静电发生组件使得磁性体101与石墨烯涂料分别荷正电及荷负电。The binder is resin powder, and the graphene coating is solid at this time, and the graphene coating is made by mixing resin powder and graphene powder. Preferably, the particle diameters of resin powder and graphene powder are 1-10 μm. The external mixer stirs and mixes the resin powder and the graphene powder evenly, and then prepares the graphene coating; the spraying device has an electrostatic generating component, and the static generating component makes the magnetic body 101 and the graphene coating positively and negatively charged respectively.
在喷涂设备对磁性体101的喷涂过程中，利用正电、负电相互吸引的原理，确保石墨烯涂料吸附在磁性体101的表面上，当石墨烯涂料在磁性体101的表面堆积预定厚度后，磁性体101表面涂覆的石墨烯涂料与喷涂装置喷出的石墨烯涂料彼此相斥，使得喷涂装置喷出的石墨烯涂料不能吸附在磁性体101的表面上，确保磁性体101的石墨烯涂料涂层厚度均匀。During the spraying process of the magnetic body 101 by the spraying equipment, the principle of mutual attraction between positive and negative charges is used to ensure that the graphene coating is adsorbed on the surface of the magnetic body 101. After the graphene coating has accumulated a predetermined thickness on the surface of the magnetic body 101, The graphene coating that the surface coating of magnetic body 101 and the graphene coating that spraying device spray repel each other, make the graphene coating that spraying device sprays can not be adsorbed on the surface of magnetic body 101, guarantee the graphene coating of magnetic body 101 Coating thickness is uniform.
提供烘烤装置，烘烤装置用于烘烤喷涂装置喷涂后的磁性体101，烘烤装置用于融化树脂粉以使得石墨烯涂料粘附在磁性体101上形成石墨烯涂层102。利用树脂粉形成涂覆在磁性体101外侧的“漆膜”，石墨烯粉经由“漆膜”牢固附着在磁性体101的外侧。A baking device is provided, the baking device is used for baking the magnetic body 101 sprayed by the spraying device, and the baking device is used for melting the resin powder so that the graphene coating adheres to the magnetic body 101 to form a graphene coating 102 . The resin powder is used to form a "paint film" coated on the outside of the magnetic body 101, and the graphene powder is firmly attached to the outside of the magnetic body 101 through the "paint film".
所述静电发生组件设置有切换单元模块，切换单元模块用于切换磁性体101与石墨烯涂料的荷电性，例如，当喷涂装置喷涂预定时长后，利用切换单元模块切换磁性体101与石墨烯涂料的荷电性，避免因磁性体101的表面的石墨烯涂料达到预定厚度后，喷涂装置喷出的石墨烯涂料由于同性相斥而不能吸附在磁性体101外侧，如此，即可在磁性体101的外侧得到不同厚度的石墨烯涂层102。Described static electricity generating assembly is provided with switching unit module, and switching unit module is used for switching the chargeability of magnetic body 101 and graphene coating, for example, after spraying device spraying predetermined length of time, utilize switching unit module to switch magnetic body 101 and graphene coating. The chargeability of the coating avoids that after the graphene coating on the surface of the magnetic body 101 reaches a predetermined thickness, the graphene coating sprayed by the spraying device cannot be adsorbed on the outside of the magnetic body 101 due to homosexual repulsion. Graphene coatings 102 of different thicknesses are obtained on the outside of 101 .
提供固化装置，固化装置设置有容置腔、固化灯、风扇及均流板，容置腔用于容设喷涂装置喷涂后的磁性体101，固化灯发出的光用于照射容置腔内所容设的磁性体101，优选地，固化灯为UV灯，利用固化灯确保石墨烯涂料快速固化在磁性体101上形成石墨烯涂层102，防止石墨烯涂料从磁性体101上脱落，风扇吹出的风经由均流板均化之后吹至容置腔内的磁性体101上，均流板为现有技术，利用均流板调整风扇吹入容置腔内的风，避免磁性体101外侧的石墨烯涂料发生流平不良。优选地，风扇间歇性正转、反转，提升磁性体101外侧的石墨烯涂料的流平效果。A curing device is provided, and the curing device is provided with an accommodating chamber, a curing lamp, a fan and an equalizer plate, the accommodating chamber is used to accommodate the magnetic body 101 sprayed by the spraying device, and the light emitted by the curing lamp is used to irradiate the magnetic body 101 in the accommodating chamber. The magnetic body 101 of accommodating, preferably, curing lamp is a UV lamp, utilizes curing lamp to ensure that graphene coating is solidified fast and forms graphene coating 102 on magnetic body 101, prevents that graphene coating from coming off from magnetic body 101, and fan blows out The wind is blown to the magnetic body 101 in the accommodating cavity after being homogenized by the flow equalizer. Poor leveling occurs with graphene coatings. Preferably, the fan rotates forward and reverse intermittently to improve the leveling effect of the graphene coating on the outside of the magnetic body 101 .
请参阅图1至图7所示，提供驱动装置1，驱动装置1包括架体2、转动设置在架体2上的轴体3、用于驱动轴体3转动的驱动电机4，驱动电机4安装在架体2上，轴体3上设置有承载面5、过气孔6及吸附环孔7，承载面5为轴体3的上端面，承载面5用于承载磁性体101，过气孔6的一端与外界的泵气装置(或者真空发生器)连通，过气孔6的另一端与吸附环孔7连通，吸附环孔7自承载面5凹设而成，承载面5所承载的磁性体101用于遮盖吸附环孔7，吸附环孔7用于吸附磁性体101。Referring to Fig. 1 to Fig. 7, a driving device 1 is provided, and the driving device 1 includes a frame body 2, a shaft body 3 which is rotated on the frame body 2, a drive motor 4 for driving the shaft body 3 to rotate, and the drive motor 4 Installed on the frame body 2, the shaft body 3 is provided with a bearing surface 5, an air passage hole 6 and an adsorption ring hole 7, the bearing surface 5 is the upper end surface of the shaft body 3, the bearing surface 5 is used to carry the magnetic body 101, and the air passage hole 6 One end of the air hole 6 communicates with the external pumping device (or vacuum generator), and the other end of the air hole 6 communicates with the adsorption ring hole 7. The adsorption ring hole 7 is recessed from the bearing surface 5, and the magnetic body carried by the bearing surface 5 101 is used to cover the adsorption ring hole 7, and the adsorption ring hole 7 is used to adsorb the magnetic body 101.
外界的机械手等将磁性体101放置在轴体3的承载面5上，利用磁性体101遮盖住吸附环孔7，然后启动外界的泵气装置，利用吸附环孔7将磁性体101吸附在承载面5上，然后启动驱动电机4，驱动电机4驱动轴体3连带磁性体101转动，喷涂装置对转动的磁性体101进行喷涂，进而将石墨烯涂料自动涂覆在磁性体101上。External manipulators place the magnetic body 101 on the bearing surface 5 of the shaft body 3, cover the adsorption ring hole 7 with the magnetic body 101, then start the external pumping device, and use the adsorption ring hole 7 to adsorb the magnetic body 101 on the bearing surface. On the surface 5, then start the driving motor 4, the driving motor 4 drives the shaft body 3 to rotate with the magnetic body 101, the spraying device sprays the rotating magnetic body 101, and then the graphene coating is automatically coated on the magnetic body 101.
所述驱动装置1还包括装设在轴体3上的固定盘8，轴体3上设置有与过气孔6连通的盲槽9，盲槽9自承载面5凹设而成，盲槽9的横截面为圆形，固定盘8包括盘体11及与盘体11连接的柱体12，盘体11的横截面为圆形，盘体11的外径小于盲槽9的孔径，柱体12容设在过线孔内，盘体11容设在盲槽9内，盘体11的外表面与盲槽9的侧壁围设形成吸附环孔7，柱体12的外表面与过气孔6的侧壁之间具有与吸附环孔7连通的间隙。The drive device 1 also includes a fixed plate 8 installed on the shaft body 3, the shaft body 3 is provided with a blind groove 9 communicating with the air passage 6, the blind groove 9 is formed by recessing the bearing surface 5, and the blind groove 9 The cross section of the disk body 11 is circular, and the fixed disk 8 includes a disk body 11 and a cylinder 12 connected with the disk body 11. The cross section of the disk body 11 is circular, and the outer diameter of the disk body 11 is smaller than the aperture of the blind groove 9. The cylinder body 12 is set in the wire passing hole, the disc body 11 is set in the blind groove 9, the outer surface of the disc body 11 and the side wall of the blind groove 9 are surrounded to form an adsorption ring hole 7, the outer surface of the cylinder 12 and the air passing hole There is a gap communicating with the adsorption ring hole 7 between the side walls of 6 .
以上内容仅为本发明的较佳实施例，对于本领域的普通技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处。The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application range.
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