WO2018161615A1 - 带螺旋纽带的片式散热器 - Google Patents

带螺旋纽带的片式散热器 Download PDF

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Publication number
WO2018161615A1
WO2018161615A1 PCT/CN2017/108513 CN2017108513W WO2018161615A1 WO 2018161615 A1 WO2018161615 A1 WO 2018161615A1 CN 2017108513 W CN2017108513 W CN 2017108513W WO 2018161615 A1 WO2018161615 A1 WO 2018161615A1
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Prior art keywords
oil
spiral
heat sink
heat radiating
heat
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PCT/CN2017/108513
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English (en)
French (fr)
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王建忠
陈志频
马昕霞
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常熟市友邦散热器有限责任公司
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Publication of WO2018161615A1 publication Critical patent/WO2018161615A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/22—Cooling by heat conduction through solid or powdered fillings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling

Definitions

  • the invention belongs to the technical field of oil-immersed transformer components, and particularly relates to a chip radiator with a spiral ties.
  • the chip heat sink As is known in the industry, in order to ensure long-term stable operation of the oil-immersed transformer, it is necessary to arrange the chip heat sink on both sides of the longitudinal direction of the oil-immersed transformer body by means of a flange connection or the like.
  • the heat transfer oil inside the oil-immersed transformer forms a circulating cooling circuit, which acts as a core for cooling the oil-immersed transformer, so that the temperature rise of the oil-immersed transformer is controlled to ensure the normal and safe power supply and distribution system. .
  • a typical "slice radiator” recommended by CN203642770U the technical point of this patent scheme is to form an irregular concave-convex structure on the outer surface of the oil passage and control the oil passage depth of the region having the concave-convex structure, and is said to have the following technical effects. : "Because the depth of the oil passage is adjusted, the oil in the oil passage has enough space to freely dissipate heat, and the space can be saved to the greatest extent, so that the heat dissipation capacity can be increased by 10-30% in the self-cooling state, and the large-capacity oil can be reduced.
  • the number of sets of chip radiators is selected for the immersion transformer, which reduces the manufacturing cost of the transformer and reduces the lateral space around the transformer occupied by the radiator (paragraph 0009 of the specification).
  • This patented scheme makes the oil flowing through the oil passage from laminar flow to turbulent flow positive, but does not play the desired effect of destroying the thermal boundary layer of the oil liquid. If the oil in the oil passage is caused to generate a secondary flow so that the oil is sufficiently mixed, the heat transfer coefficient is remarkably improved.
  • Conventional measures to improve the heat transfer coefficient can provide a spiral ties in the oil passage, but the provision of a spiral ties in the entire oil passage increases the flow resistance of the oil, which is counterproductive for improving the heat dissipation of the radiator. Therefore, how to find a reasonable balance between not increasing the flow resistance and facilitating the generation of secondary flow has long been plagued by the industry.
  • the technical solution to be introduced below is generated in this context.
  • the object of the present invention is to provide a cooling fluid which is capable of forming a secondary flow of oil flowing through an oil passage, thereby destroying the thermal boundary layer of the oil and significantly increasing the heat transfer coefficient, thereby facilitating the avoidance of increased flow resistance and thereby ensuring heat dissipation.
  • the object of the present invention is to provide a spiral radiator with a screw-joint, comprising an oil inlet pipe, a return oil pipe and a group of longitudinally parallel and spaced apart from each other between the oil inlet pipe and the oil return pipe.
  • Used to feed oil The high-temperature oil introduced by the tube is cooled and then returned to the heat sink of the oil return pipe.
  • Each of the heat-dissipating fins is composed of a front heat-dissipating plate and a rear heat-dissipating plate, and the front heat-dissipating plate and the rear heat-dissipating plate are face-to-face and surround each other.
  • the edge portion is welded to each other by the edge weld bead of the heat sink, and the upper portion between the front and rear heat sinks is formed as a heat sink inlet chamber, the lower portion is formed as a heat sink returning oil chamber, and the middle portion is configured as heat dissipation oil.
  • the upper part of the heat dissipating oil passage communicates with the oil inlet cavity of the heat sink, the lower part of the heat dissipating oil passage communicates with the oil returning cavity of the heat sink, the oil inlet cavity of the heat sink communicates with the oil inlet pipe, and the oil returning cavity of the heat sink communicates with the oil return pipe, wherein a spiral ties are disposed in the heat dissipating oil passage, wherein the spiral ties are disposed at an upper portion or a middle portion of a height direction of the heat dissipating oil passage, and a ratio of a length of the spiral ties to a height of the heat dissipating oil passages It is 3.5-4.5:100.
  • the helical yoke has a helix angle of 180°.
  • an oil inlet fitting flange for mating with a transformer oil outlet of an oil-immersed transformer is formed at one end of the oil inlet pipe, and the other end of the oil inlet pipe is closed.
  • a radiator lug is fixed to a side of the middle and upward of the oil inlet pipe.
  • a venting screw plug is disposed on a side of the oil inlet pipe facing upward.
  • a return pipe fitting flange for mating with a transformer inlet of an oil-immersed transformer is formed at one end of the oil return pipe, and the other end of the oil return pipe Closed.
  • an oil drain plug is provided on a downwardly facing side of the oil return pipe.
  • fins are connected to the reinforcing ribs on both sides of the set of fins.
  • the front and rear heat sinks are stainless steel.
  • the helical ties are made of stainless steel strips.
  • the technical effect of the technical solution provided by the present invention is that, since the spiral tie is disposed in the upper or middle portion of the heat dissipation oil passage in the height direction and the ratio of the length to the height of the heat dissipation oil passage is 3.5-4.5:100,
  • the secondary flow of oil causes the oil to mix well, and destroys the thermal boundary layer of the oil to increase the heat transfer coefficient, and avoids increasing the flow resistance of the oil to ensure heat dissipation efficiency;
  • Significant improvements have been made, which has helped to reduce the size of the heat sink and reduce the number of sets of heat sinks on the oil-immersed transformer, which is very beneficial for transformer users to reduce costs and improve the adaptability to the installation space.
  • Figure 1 is a block diagram of an embodiment of the present invention.
  • Figure 2 is a front elevational view and partial cross-sectional view of Figure 1.
  • Fig. 3 is a detailed structural view of the spiral yoke shown in Fig. 2.
  • FIGS. 1 to 3 are transverse cross-sectional views of the heat sink shown in FIGS. 1 to 3.
  • an inlet pipe 1, a return pipe 2, and a set of longitudinally parallel and spaced apart from each other between the inlet pipe 1 and the return pipe 2 are shown for introducing the inlet pipe 1
  • the high-temperature oil is cooled and then returned to the heat sink 3 of the oil return pipe 2.
  • Each of the heat sinks 3 is composed of a front heat dissipation plate 31 and a rear heat dissipation plate 32.
  • the front heat dissipation plate 31 and the rear heat dissipation plate 32 are mutually Face-to-face fit and welded to each other at the peripheral edge portion by the fin margin weld bead 33, the upper portion between the front and rear fins 31, 32 is formed as a fin inlet chamber 34, and the lower portion is formed as a fin back
  • the oil chamber 35 is formed, and the central portion is formed as a heat dissipation oil passage 36.
  • the upper portion of the heat dissipation oil passage 36 communicates with the heat sink oil inlet chamber 34, and the lower portion of the heat dissipation oil passage 36 communicates with the heat sink oil return chamber 35.
  • the heat transfer fin returning oil chamber 35 is in communication with the oil return pipe 2, and the spiral heat exchanger belt 4 is disposed in the heat radiating oil passage 36.
  • the aforementioned spiral link 4 is disposed on the upper portion in the height direction of the heat dissipating oil passage 36 by welding, and the ratio of the length of the spiral link 4 to the height of the heat dissipating oil passage 36 is 4:100.
  • the spiral ties 4 extend downward from the upper heat dissipating oil passage inlet of the heat dissipating oil passage 36 by 4 cm, for example, when the fins 3 are deducted from the height of the upper fin inlet chamber 34 and the lower fins are returned to the oil.
  • the height of the heat dissipating oil passage 36 after the height of the cavity 35 is 100 cm, and the length of the spiral tether 4 is 4 cm.
  • the invention satisfies the requirement that the heat sink oil inlet 34 is introduced into the heat dissipating oil passage 36 and the heat dissipating oil passage 36 is introduced into the fin return oil chamber 35 to generate secondary flow and destroy the oil thermal boundary layer, and the avoidance is satisfied. Increase the fluid flow resistance requirements.
  • the aforementioned spiral link 4 has a helix angle of 180°.
  • an oil inlet pipe fitting flange 11 for mating with the transformer oil outlet of the oil immersed transformer is formed, and the other end of the oil inlet pipe 1 is closed and is in the oil inlet pipe.
  • a radiator lug 12 is fixed to a central portion of the first and upward side, and a vent screw 13 is provided on a side of the inlet duct 1 facing upward.
  • a return pipe fitting flange 21 for mating with the transformer inlet of the oil-immersed transformer is formed, and the other end of the oil return pipe 2 is closed and on the downward side of the oil return pipe 2
  • An oil drain plug (not shown) is provided.
  • heat sink connection ribs 37 are disposed on both sides of the aforementioned one set of fins 3 .
  • the aforementioned front heat sink 31 and rear heat sink 32 are stainless steel plates, and the aforementioned spiral tie 4 is made of a stainless steel strip.
  • the high-temperature oil from the oil-immersed transformer is connected to the flange 11 through the inlet pipe, the inlet pipe, and the heat sink into the oil chamber. 34 and the heat dissipating oil passage 36 and passing through the upper and lower spiral ties 4, then passing through the fin return oil chamber 35 and then passing through the oil return pipe 2, and then being returned to the oil immersed transformer through the return pipe fitting flange 21.
  • the technical solution provided by the present invention compensates for the shortcomings in the prior art, successfully completes the inventive task, and faithfully implements the technical effects described by the applicant in the above technical effects column.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

一种带螺旋纽带的片式散热器，包括进油管、回油管及一组散热片，一组散热片各由前、后散热板片组成，前、后散热片之间的上部区域构为散热片进油腔，下部区域构为散热片回油腔，中部区域构为散热油道，散热片进油腔与进油管相通，散热片回油腔与回油管相通，散热油道内设螺旋纽带，特点：螺旋纽带设在散热油道的上部或中部，且该螺旋纽带的长度与散热油道的高度之比为3.5-4.5∶100。可使油液产生二次流，促使油液充分混合，及破坏油液的热边界层而得以增大传热系数，避免增大油液的流阻，确保散热效率；减小散热器的规格尺寸以及减少散热器在油浸式变压器上的配置组数，降低成本及增进对安装空间的适应程度。

Description

带螺旋纽带的片式散热器 技术领域
本发明属于油浸式变压器构件技术领域，具体涉及一种带螺旋纽带的片式散热器。
背景技术
如业界所知，为了确保油浸式变压器得以长期稳定运行，需在油浸式变压器本体的长边方向的两侧借助于法兰连接方式或其它类似连接方式配置片式散热器，片式散热器与油浸式变压器内部的导热油形成循环冷却回路，起到对油浸式变压器内部的铁芯冷却的作用，使油浸式变压器的温升得到控制，保障供配电系统的正常与安全。
在公开的中国专利文献中不乏关于片式散热器的技术信息，如CN201084519Y(变压器片式散热器)、CN201229827Y(散热片阶梯式散热器)、CN201185117Y(变压器用的片式散热器)、CN201185118Y(变压器的散热器)、CN201185115Y(具有风机座的散热器)、CN201256051Y及CN101388275A(采用蒸发冷却技术的变压器换热器)、CN202394651U(变压器片式散热器)、CN201331277Y(变压器用片式散热器)和CN101930829A(一种油浸式变压器的散热器)，等等。
典型的如CN203642770U推荐的“片式散热器”，该专利方案的技术要点是将油道的外表面形成不规则的凹凸结构以及控制具有凹凸结构的区域的油道深度，并且著称具有如下技术效果：“因调整了油道的深度，令油道内的油既有足够的空间可以自由散热，还能最大程度地节约空间，使散热能力在自冷状态下提高10-30％，减少大容量油浸变压器选用片式散热器的组数，降低变压器制造成本，减少散热器占用变压器周围的横向空间(说明书第0009段)”。该专利方案使流经油道的油液由层流变为湍流具有积极意义，但是并不能起到破坏油液热边界层的期望效果系该专利之缺憾。如果能使油道内的油液产生二次流而藉以使油液充分混合，那么传热系数得以显著改善。改善传热系数的惯常措施可以在油道内设置螺旋纽带，但是在整个油道内通体设置螺旋纽带会增大油液的流阻，对于改善散热器的散热效果适得其反。因此如何在不增大流阻与有利于产生二次流之间找到合理的平衡点长期以来困扰于业界，下面将要介绍的技术方案便是在这种背景下产生的。
发明内容
本发明的任务在于提供一种既有助于使流经油道内的油液形成二次流而藉以破坏油液热边界层并且显著提高传热系数又有利于避免增大流阻而藉以保障散热效率的带螺旋纽带的片式散热器。
本发明的任务是这样来完成的，一种带螺旋纽带的片式散热器，包括一进油管、一回油管以及一组既彼此纵向并行又相互间隔地配置在进油管与回油管之间的用于将进油 管引入的高温油液散热后回引至回油管的散热片，一组散热片各由前散热板片和后散热板片组成，该前散热板片和后散热板片彼此面对面配合并且在四周边缘部位由散热片边际焊道相互焊接为一体，前、后散热片之间的上部区域构成为一散热片进油腔，下部区域构成为一散热片回油腔，而中部区域构成为散热油道，散热油道的上部与散热片进油腔相通，散热油道的下部与散热片回油腔相通，散热片进油腔与进油管相通，而散热片回油腔与回油管相通，其中，在所述散热油道内设置有螺旋纽带，特征在于所述的螺旋纽带设置在所述散热油道的高度方向的上部或中部，并且该螺旋纽带的长度与所述散热油道的高度之比为3.5-4.5∶100。
在本发明的一个具体的实施例中，所述的螺旋纽带的螺旋角为180°。
在本发明的另一个具体的实施例中，在所述进油管的一端构成有一用于与油浸式变压器的变压器出油口配接的进油管配接法兰，而进油管的另一端封闭。
在本发明的又一个具体的实施例中，在所述进油管的中部并且朝向上的一侧固定有散热器吊耳。
在本发明的再一个具体的实施例中，在所述进油管朝向上的一侧设置有一放气螺塞。
在本发明的还有一个具体的实施例中，在所述回油管的一端构成有一用于与油浸式变压器的变压器进油口配接的回油管配接法兰，而回油管的另一端封闭。
在本发明的更而一个具体的实施例中，在所述回油管朝向下的一侧设置有一放油螺塞。
在本发明的进而一个具体的实施例中，在所述的一组散热片的两侧各设置有散热片连接加强筋条。
在本发明的又更而一个具体的实施例中，所述的前散热板和后散热板为不锈钢板。
在本发明的又进而一个具体的实施例中，所述的螺旋纽带由不锈钢板带制成。
本发明提供的技术方案的技术效果在于，由于将螺旋纽带设置在了散热油道的高度方向的上部或中部并且其长度与散热油道的高度之比为3.5-4.5∶100，因而既可使油液产生二次流，促使油液充分混合，以及破坏油液的热边界层而得以增大传热系数，又能避免增大油液的流阻，确保散热效率；由于散热器的散热效率得以显著改善，因而有利于减小散热器的规格尺寸以及减少散热器在油浸式变压器上的配置组数，十分有利于变压器用户降低成本以及增进对安装空间的适应程度。
附图说明
图1为本发明的实施例结构图。
图2为图1的正视图暨局部剖视图。
图3为图2所示的螺旋纽带的详细结构图。
图4为图1至图3所示的散热片的横向剖视图。
具体实施方式
实施例1：
请参见图1至图4，示出了一进油管1、一回油管2以及一组既彼此纵向并行又相互间隔地配置在进油管1与回油管2之间的用于将进油管1引入的高温油液散热后回引至回油管2的散热片3，一组散热片3各由前散热板片31和后散热板片32组成，该前散热板片31和后散热板片32彼此面对面配合并且在四周边缘部位由散热片边际焊道33相互焊接为一体，前、后散热片31、32之间的上部区域构成为一散热片进油腔34，下部区域构成为一散热片回油腔35，而中部区域构成为散热油道36，散热油道36的上部与散热片进油腔34相通，散热油道36的下部与散热片回油腔35相通，散热片进油腔34与进油管1相通，而散热片回油腔35与回油管2相通，其中，在前述散热油道36内设置有螺旋纽带4。
作为本发明提供的技术方案的技术要点：前述的螺旋纽带4通过焊接方式设置在前述散热油道36的高度方向的上部，并且该螺旋纽带4的长度与前述散热油道36的高度之比为4∶100。由此可知，螺旋纽带4自散热油道36的上部的散热油道进油口向下延伸4cm，例如当散热片3在扣除上部的散热片进油腔34的高度以及下部的散热片回油腔35的高度后的散热油道36的高度为100cm，那么螺旋纽带4的长度为4cm，这一选择结果是本申请人经过了非有限次数的实验得到的，具体而言，这一选择结果既满足了使自散热片进油腔34引入散热油道36以及使散热油道36引入散热片回油腔35的油液产生二次流并破坏油液热边界层的要求，又满足了避免增大油液流阻的要求。
在本实施例中，前述的螺旋纽带4的螺旋角为180°。
请重点见图1，在前述进油管1的一端构成有一用于与油浸式变压器的变压器出油口配接的进油管配接法兰11，而进油管1的另一端封闭并且在进油管1的中部并且朝向上的一侧固定有散热器吊耳12以及在进油管1朝向上的一侧设置有一放气螺塞13。
在前述回油管2的一端构成有一用于与油浸式变压器的变压器进油口配接的回油管配接法兰21，而回油管2的另一端封闭并且在回油管2朝向下的一侧设置有一放油螺塞(图中未示出)。
优选地，在前述的一组散热片3的两侧各设置有散热片连接加强筋条37。
在本实施例中，前述的前散热板31和后散热板32为不锈钢板，前述的螺旋纽带4由不锈钢板带制成。
出自油浸式变压器的高温油液依次经进油管配接法兰11、进油管1、散热片进油腔 34和散热油道36并且途经上部以及下部的螺旋纽带4后经散热片回油腔35再经回油管2，进而经回油管配接法兰21回引至油浸式变压器。
实施例2：
仅将螺旋纽带4的长度与散热油道36的高度之比改为3.5∶100，并且螺旋纽带4通过焊接方式设置在散热油道36的高度方向的中部，其余均同对实施例1的描述。
实施例3：
仅将螺旋纽带4的长度与散热油道36的高度之比改为4.5∶100，其余均同对实施例1的描述。
综上所述，本发明提供的技术方案弥补了已有技术中的缺憾，顺利地完成了发明任务，如实地兑现了申请人在上面的技术效果栏中载述的技术效果。

Claims (10)

  1. 一种带螺旋纽带的片式散热器，包括一进油管(1)、一回油管(2)以及一组既彼此纵向并行又相互间隔地配置在进油管(1)与回油管(2)之间的用于将进油管(1)引入的高温油液散热后回引至回油管(2)的散热片(3)，一组散热片(3)各由前散热板片(31)和后散热板片(32)组成，该前散热板片(31)和后散热板片(32)彼此面对面配合并且在四周边缘部位由散热片边际焊道(33)相互焊接为一体，前、后散热片(31、32)之间的上部区域构成为一散热片进油腔(34)，下部区域构成为一散热片回油腔(35)，而中部区域构成为散热油道(36)，散热油道(36)的上部与散热片进油腔(34)相通，散热油道(36)的下部与散热片回油腔(35)相通，散热片进油腔(34)与进油管(1)相通，而散热片回油腔(35)与回油管(2)相通，其中，在所述散热油道(36)内设置有螺旋纽带(4)，其特征在于所述的螺旋纽带(4)设置在所述散热油道(36)的高度方向的上部或中部，并且该螺旋纽带(4)的长度与所述散热油道(36)的高度之比为3.5-4.5∶100。
  2. 根据权利要求1所述的带螺旋纽带的片式散热器，其特征在于所述的螺旋纽带(4)的螺旋角为180°。
  3. 根据权利要求1所述的带螺旋纽带的片式散热器，其特征在于在所述进油管(1)的一端构成有一用于与油浸式变压器的变压器出油口配接的进油管配接法兰(11)，而进油管(1)的另一端封闭。
  4. 根据权利要求1或3所述的带螺旋纽带的片式散热器，其特征在于在所述进油管(1)的中部并且朝向上的一侧固定有散热器吊耳(12)。
  5. 根据权利要求4所述的带螺旋纽带的片式散热器，其特征在于在所述进油管(1)朝向上的一侧设置有一放气螺塞(13)。
  6. 根据权利要求1所述的带螺旋纽带的片式散热器，其特征在于在所述回油管(2)的一端构成有一用于与油浸式变压器的变压器进油口配接的回油管配接法兰(21)，而回油管(2)的另一端封闭。
  7. 根据权利要求1或6所述的带螺旋纽带的片式散热器，其特征在于在所述回油管(2)朝向下的一侧设置有一放油螺塞。
  8. 根据权利要求1所述的带螺旋纽带的片式散热器，其特征在于在所述的一组散热片(3)的两侧各设置有散热片连接加强筋条(37)。
  9. 根据权利要求1所述的带螺旋纽带的片式散热器，其特征在于所述的前散热板(31)和后散热板(32)为不锈钢板。
  10. 根据权利要求1或2所述的带螺旋纽带的片式散热器，其特征在于所述的螺旋纽带(4)由不锈钢板带制成。
PCT/CN2017/108513 2017-03-06 2017-10-31 带螺旋纽带的片式散热器 WO2018161615A1 (zh)

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