WO2023102910A1 - 一种夹层式电阻器 - Google Patents

一种夹层式电阻器 Download PDF

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Publication number
WO2023102910A1
WO2023102910A1 PCT/CN2021/137157 CN2021137157W WO2023102910A1 WO 2023102910 A1 WO2023102910 A1 WO 2023102910A1 CN 2021137157 W CN2021137157 W CN 2021137157W WO 2023102910 A1 WO2023102910 A1 WO 2023102910A1
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Prior art keywords
resistor
sandwich
resistance
resistor according
curved section
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PCT/CN2021/137157
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English (en)
French (fr)
Inventor
谢庆坚
廖汉卿
李波
陈昌荣
Original Assignee
广东福德电子有限公司
株洲福德轨道交通研究院有限公司
湖南福德电气有限公司
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Publication of WO2023102910A1 publication Critical patent/WO2023102910A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/01—Mounting; Supporting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/08—Cooling, heating or ventilating arrangements

Definitions

  • the invention relates to the technical field of resistors, in particular to a sandwich resistor.
  • Resistors generally include a plurality of parallel resistors. Under the action of high current, two adjacent resistors are easy to pull in. In order to prevent the pull-in between resistors, the prior art is to have Coaxial holes, with mica strings and mica rings in the middle to separate adjacent resistors, that is, after each mica string passes through a resistor, it passes through a mica ring, and then passes through the next resistor. In this way, adjacent resistor sheets are separated by the mica ring.
  • the resistor chips of the existing chip resistors are all exposed, and the dustproof and pollution-proof grades are low. Due to insulation requirements, there must be a gap between the existing adjacent resistors, and the resistors inevitably have a displacement space in the arrangement direction. When a large current passes, the resistors will be heated and deformed, and even attract each other to varying degrees. Affect stability and insulation performance.
  • the resistance slices of the existing chip resistors are all exposed, and the dustproof and pollution-proof grades are low. Due to insulation requirements, there must be a gap between the existing adjacent resistors, and the resistors inevitably have a displacement space in the arrangement direction. When a large current passes, the resistors will be heated and deformed, and even attract each other to varying degrees. Affect stability and insulation performance.
  • the present invention provides a sandwich resistor with high dust and pollution resistance, good insulation and high stability.
  • the present invention provides the following technical solutions:
  • a sandwich resistor which includes a support module and a resistance unit.
  • the resistance unit includes a plurality of resistance sheets and a plurality of insulation separators arranged in sequence at intervals.
  • a transition hole is opened near the end of the insulation separator.
  • the resistance sheet The end of the end is integrally formed with a curved section, which passes through the transition hole and is connected to another resistor sheet, so that multiple resistor sheets are electrically connected; the two sides of each resistor sheet are pasted by different insulating separators Cover tightly.
  • the bending diameter of the bending section is equal to the thickness of the insulating separator.
  • the curved section is provided with a U-shaped copper strip, and the side of the copper strip is attached to the side wall of the curved section.
  • the curved section of the resistance sheet is against the side wall of the corresponding transition hole, and the copper strip is attached to the inner side of the curved section.
  • topmost and bottommost resistor sheets partially extend outwards outside the resistor unit as lead ends, and the corresponding insulating separators are provided with gaps.
  • the support module includes a base, a support plate, a pressure plate and a locking assembly, the support plate is fixed on the base, the resistance unit is laminated on the support plate, and the locking assembly fixes the pressure plate to the base, so that the pressure plate presses down on the resistance unit, Between the pressure plate and the resistance unit, between the support plate and the resistance unit are the insulating separators.
  • the locking assembly includes a screw and a nut.
  • the screw passes through the pressure plate and is embedded in the grooves of multiple insulating separators, and then passes through the support plate and the base to combine with the nut. Lock, so as to limit the resistance unit vertically and horizontally.
  • the outer side of the screw rod is covered with a limiting sleeve, and the limiting sleeve is in interference fit with the groove of the insulating separator.
  • the thickness of the insulating separator is 3 to 5 times that of the resistance sheet.
  • the insulating separator is a mica sheet.
  • the interlayer resistor of the present invention has a transition hole for the end of the resistor sheet to pass through the insulating separator, and the two sides of the multiple resistor sheets are tightly covered by different insulating separators. Therefore, dust and other impurities will basically not fall on the surface of the resistor, so the dustproof and anti-fouling level is high; there is no room for deformation of the resistor in the arrangement direction, so the resistor will not deform at all after power-on, and different resistors will not be close to each other. Mobile, so the structure is stable and the insulation performance is good.
  • FIG. 1 is a schematic structural diagram of a sandwich resistor in an embodiment.
  • Fig. 2 is a cross-sectional view of a sandwich resistor in an embodiment.
  • Fig. 3 is an enlarged view of A in Fig. 2 .
  • FIG. 4 is a schematic structural diagram of a sandwich resistor in an embodiment after a part of the insulating spacer is hidden.
  • FIG. 5 is a cross-sectional view of another section of the sandwich resistor in the embodiment.
  • FIG. 6 is a schematic structural diagram of a resistor sheet of a sandwich resistor in an embodiment.
  • FIG. 7 is a schematic structural diagram of an insulating spacer of a sandwich resistor in an embodiment.
  • Support module 1 base 11, support plate 12, pressure plate 13, locking assembly 14, screw rod 141, nut 142, limit sleeve 143;
  • Resistance unit 2 resistance sheet 21 , bent section 211 , lead-out end 212 , insulating separator 22 , transition hole 221 , groove 222 , and copper strip 23 .
  • the sandwich resistor of this embodiment includes a support module 1 and a resistance unit 2, and the resistance unit 2 includes a plurality of resistance sheets 21 and a plurality of insulation spacers 22 that are sequentially stacked at intervals, and are insulated.
  • a transition hole 221 is provided near the end of the separator 22, and a curved section 211 is integrally formed at the end of the resistor sheet 21, and the curved section 211 passes through the transition hole 221 and is connected to another resistor sheet 21, so that multiple The resistor sheets 21 are electrically connected; the two sides of each resistor sheet 21 are closely covered by different insulating separators 22, and impurities such as dust will not fall on the surface of the resistor sheet 21, so the dustproof and antifouling level is high; There is no room for deformation of the sheets 21 in the arrangement direction, so the resistor sheets 21 will not be deformed at all after being energized, and different resistor sheets 21 will not move close to each other, so the structure is stable and the insulation performance is good.
  • the bending diameter of the bending section 211 is equal to the thickness of the insulating separator 22 , so that the bending section 211 transitions smoothly to avoid compression and breakage.
  • the curved section 211 is provided with a U-shaped copper strip 23 , and the side of the copper strip 23 is attached to the sidewall of the curved section 211 . Copper bar 23 is used to limit the position to prevent breakage during the clamping process and improve the flow capacity.
  • the curved section 211 of the resistor sheet 21 bears against the side wall of the corresponding transition hole 221 , which further prevents the lateral movement of the resistor sheet 21 and facilitates positioning and guiding installation.
  • the copper strip 23 is attached to the inner side of the curved section 211 .
  • the topmost and bottommost resistor sheets 21 partially extend out of the resistor unit 2 as lead-out ends 212 for connecting with other resistors or using equipment, and the corresponding insulating separators 22 have gaps. For the lead-out end 212 to pass through.
  • the supporting module 1 includes a base 11, a supporting plate 12, a pressing plate 13 and a locking assembly 14, the supporting plate 12 is fixed on the base 11, the resistance unit 2 is stacked on the supporting plate 12, and the locking assembly 14 fixes the pressing plate 13 on the base 11 , so that the pressing plate 13 presses down the resistance unit 2 , and between the pressing plate 13 and the resistance unit 2 , and between the support plate 12 and the resistance unit 2 are the insulating separators 22 .
  • Pressing plate 13 is a stainless steel plate.
  • the screw 141 passes through the pressure plate 13 and is embedded in the grooves 222 of the plurality of insulating separators 22, and then passes through the support
  • the board 12 and the base 11 are then locked together with nuts 142, so as to limit the resistance unit 2 longitudinally and laterally.
  • the outer side of the screw 141 is covered with a limiting sleeve 143 , and the limiting sleeve 143 is in interference fit with the groove 222 of the insulating separator 22 .
  • the limiting sleeve 143 is a ceramic cylinder or a flexible silicone cylinder.
  • the thickness of the insulating separator 22 is 3 to 5 times that of the resistive sheet 21, and the thickness is cleverly set so that the resistive sheet 21 is thinner, which is convenient for the insulating separator 22 to absorb heat and transfer it to dissipate heat.
  • the insulating separator 22 is preferably a mica sheet, and the mica itself can absorb heat and provide energy.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Details Of Resistors (AREA)

Abstract

本发明涉及电阻技术领域，具体涉及一种夹层式电阻器，包括支撑模块和电阻单元，电阻单元包括依次间隔层叠布置的多片电阻片和多片绝缘分隔片，绝缘分隔片的靠近端部的位置开有过渡孔，电阻片的端部一体成型有弯曲段，弯曲段穿过所述过渡孔与另一电阻片相连接，从而使多片电阻片电连接起来；每片电阻片的两侧面均被不同的绝缘分隔片贴紧覆盖，因此灰尘等杂质基本不会落到电阻片表面，因此防尘防污等级高；电阻片在排列方向没有变形的空间，因此电阻片在通电后完全不会变形，不同电阻片更加不会相靠近移动，因而结构稳定，绝缘性能好。

Description

一种夹层式电阻器 技术领域
本发明涉及电阻技术领域，具体涉及一种夹层式电阻器。
 背景技术
电阻器一般包括多片并列的电阻片，在大电流作用下，相邻两片电阻片之间容易吸合，为防止电阻片之间吸合，现有技术是在每一片的电阻片上开有同轴的孔，中间加云母串杆和云母环来隔开相邻的电阻片，即云母串杆每穿过一片电阻片后，再穿过一个云母环，然后再穿过下一片电阻片，这样相邻电阻片之间就通过该云母环来隔开。
然而现有的片式电阻器的电阻片都是外露的，防尘防污等级低。因绝缘要求，现有的相邻电阻片之间必须存在间隙，则电阻片不可避免地在排列方向存在位移空间，大电流通过时会使电阻片发热而变形，甚至不同程度地相互吸合，影响稳定性以及绝缘性能。
 技术问题
现有的片式电阻器的电阻片都是外露的，防尘防污等级低。因绝缘要求，现有的相邻电阻片之间必须存在间隙，则电阻片不可避免地在排列方向存在位移空间，大电流通过时会使电阻片发热而变形，甚至不同程度地相互吸合，影响稳定性以及绝缘性能。
 技术解决方案
针对现有技术存在上述技术问题，本发明提供一种夹层式电阻器，防尘防污等级高，绝缘性好，稳定性高。
为实现上述目的，本发明提供以下技术方案：
提供一种夹层式电阻器，包括支撑模块和电阻单元，电阻单元包括依次间隔层叠布置的多片电阻片和多片绝缘分隔片，绝缘分隔片的靠近端部的位置开有过渡孔，电阻片的端部一体成型有弯曲段，弯曲段穿过所述过渡孔与另一电阻片相连接，从而使多片电阻片电连接起来；每片电阻片的两侧面均被不同的绝缘分隔片贴紧覆盖。
具体的，所述弯曲段的弯曲直径等于绝缘分隔片的厚度。
具体的，所述弯曲段设有U形的铜条，铜条的侧面与弯曲段的侧壁相贴合。
具体的，电阻片的弯曲段顶住对应过渡孔的侧壁，铜条贴合于弯曲段的内侧。
具体的，最顶层和最底层的电阻片局部朝外延伸出电阻单元外作为引出端，对应的绝缘分隔片开有让位缺口。
具体的，支撑模块包括底座、支撑板、压板和锁紧组件，支撑板固定于底座，电阻单元层叠在支撑板上，锁紧组件将压板固定于底座，从而使得压板朝下压住电阻单元，压板和电阻单元之间、支撑板与电阻单元之间均为所述绝缘分隔片。
具体的，绝缘分隔片的周侧开有多个凹槽，锁紧组件包括螺杆和螺母，螺杆穿过压板并嵌入多片绝缘分隔片的凹槽中，再穿过支撑板和底座后结合螺母锁紧，从而纵向横向限位住电阻单元。
具体的，螺杆的外侧套有限位套，限位套与绝缘分隔片的凹槽过盈配合。
具体的，绝缘分隔片的厚度为电阻片的3~5倍。
具体的，绝缘分隔片为云母片。
 有益效果
本发明的夹层式电阻器，与现有技术相比，由于绝缘分隔片开有过渡孔供电阻片的端部穿过，而且多片电阻片的两侧面均被不同绝缘分隔片贴紧覆盖，因此灰尘等杂质基本不会落到电阻片表面，因此防尘防污等级高；电阻片在排列方向没有变形的空间，因此电阻片在通电后完全不会变形，不同电阻片更加不会相靠近移动，因而结构稳定，绝缘性能好。
 附图说明
图1为实施例中的夹层式电阻器的结构示意图。
图2为实施例中的夹层式电阻器的剖视图。
图3为图2中A处的放大视图。
图4为实施例中的夹层式电阻器的隐藏了部分绝缘分隔片后的结构示意图。
图5为实施例中的夹层式电阻器的另一截面的剖视图。
图6为实施例中的夹层式电阻器的电阻片的结构示意图。
图7为实施例中的夹层式电阻器的绝缘分隔片的结构示意图。
附图标记：
支撑模块1、底座11、支撑板12、压板13、锁紧组件14、螺杆141、螺母142、限位套143；
电阻单元2、电阻片21、弯曲段211、引出端212、绝缘分隔片22、过渡孔221、凹槽222、铜条23。
 本发明的实施方式
以下结合具体实施例及附图对本发明进行详细说明。
本实施例的夹层式电阻器，如图1至图7所示，包括支撑模块1和电阻单元2，电阻单元2包括依次间隔层叠布置的多片电阻片21和多片绝缘分隔片22，绝缘分隔片22的靠近端部的位置开有过渡孔221，电阻片21的端部一体成型有弯曲段211，弯曲段211穿过所述过渡孔221与另一电阻片21相连接，从而使多片电阻片21电连接起来；每片电阻片21的两侧面均被不同的绝缘分隔片22贴紧覆盖，灰尘等杂质基本不会落到电阻片21表面，因此防尘防污等级高；电阻片21在排列方向没有变形的空间，因此电阻片21在通电后完全不会变形，不同电阻片21更加不会相靠近移动，因而结构稳定，绝缘性能好。
本实施例中，所述弯曲段211的弯曲直径等于绝缘分隔片22的厚度，这样弯曲段211较为圆滑地过渡，避免压紧折坏。弯曲段211设有U形的铜条23，铜条23的侧面与弯曲段211的侧壁相贴合。采用铜条23限位，防止夹紧过程断裂，提高通流能力。电阻片21的弯曲段211顶住对应过渡孔221的侧壁，这样进一步阻止电阻片21横向移动，便于定位导向安装，铜条23贴合于弯曲段211的内侧。
本实施例中，最顶层和最底层的电阻片21局部朝外延伸出电阻单元2外作为引出端212，用于与其它电阻器或使用设备连接，对应的绝缘分隔片22开有让位缺口供引出端212穿出。
本实施例中，支撑模块1包括底座11、支撑板12、压板13和锁紧组件14，支撑板12固定于底座11，电阻单元2层叠在支撑板12上，锁紧组件14将压板13固定于底座11，从而使得压板13朝下压住电阻单元2，压板13和电阻单元2之间、支撑板12与电阻单元2之间均为所述绝缘分隔片22。压板13为不锈钢板。绝缘分隔片22的周侧开有多个凹槽222，锁紧组件14包括螺杆141和螺母142，螺杆141穿过压板13并嵌入多片绝缘分隔片22的凹槽222中，再穿过支撑板12和底座11后结合螺母142锁紧，从而纵向横向限位住电阻单元2。螺杆141的外侧套有限位套143，限位套143与绝缘分隔片22的凹槽222过盈配合，限位套143为陶瓷筒，或者柔性的硅胶筒。
实际中，绝缘分隔片22的厚度为电阻片21的3~5倍，巧妙的厚度设置，电阻片21较薄，便于绝缘分隔片22将热量吸收传递出散热。绝缘分隔片22优选为云母片，云母本身可以吸收热量，可以提供能量。
最后应当说明的是，以上实施例仅用以说明本发明的技术方案，而非对本发明保护范围的限制，尽管参照较佳实施例对本发明作了详细地说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的实质和范围。

Claims (10)

  1. 一种夹层式电阻器，其特征是：包括支撑模块和电阻单元，电阻单元包括依次间隔层叠布置的多片电阻片和多片绝缘分隔片，绝缘分隔片的靠近端部的位置开有过渡孔，电阻片的端部一体成型有弯曲段，弯曲段穿过所述过渡孔与另一电阻片相连接，从而使多片电阻片电连接起来；每片电阻片的两侧面均被不同的绝缘分隔片贴紧覆盖。
  2. 根据权利要求1所述的一种夹层式电阻器，其特征是：所述弯曲段的弯曲直径等于绝缘分隔片的厚度。
  3. 根据权利要求1所述的一种夹层式电阻器，其特征是：所述弯曲段设有U形的铜条，铜条的侧面与弯曲段的侧壁相贴合。
  4. 根据权利要求3所述的一种夹层式电阻器，其特征是：电阻片的弯曲段顶住对应过渡孔的侧壁，铜条贴合于弯曲段的内侧。
  5. 根据权利要求1所述的一种夹层式电阻器，其特征是：最顶层和最底层的电阻片局部朝外延伸出电阻单元外作为引出端，对应的绝缘分隔片开有让位缺口。
  6. 根据权利要求1所述的一种夹层式电阻器，其特征是：支撑模块包括底座、支撑板、压板和锁紧组件，支撑板固定于底座，电阻单元层叠在支撑板上，锁紧组件将压板固定于底座，从而使得压板朝下压住电阻单元，压板和电阻单元之间、支撑板与电阻单元之间均为所述绝缘分隔片。
  7. 根据权利要求6所述的一种夹层式电阻器，其特征是：绝缘分隔片的周侧开有多个凹槽，锁紧组件包括螺杆和螺母，螺杆穿过压板并嵌入多片绝缘分隔片的凹槽中，再穿过支撑板和底座后结合螺母锁紧，从而纵向横向限位住电阻单元。
  8. 根据权利要求7所述的一种夹层式电阻器，其特征是：螺杆的外侧套有限位套，限位套与绝缘分隔片的凹槽过盈配合。
  9. 根据权利要求1所述的一种夹层式电阻器，其特征是：绝缘分隔片的厚度为电阻片的3~5倍。
  10. 根据权利要求1所述的一种夹层式电阻器，其特征是：绝缘分隔片为云母片。
PCT/CN2021/137157 2021-12-06 2021-12-10 一种夹层式电阻器 WO2023102910A1 (zh)

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