CN105135932A - Low-flow-resistance rotor for reinforcing heat transfer and scale removal/prevention in heat exchange tube - Google Patents
Low-flow-resistance rotor for reinforcing heat transfer and scale removal/prevention in heat exchange tube Download PDFInfo
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- 230000002265 prevention Effects 0.000 title claims description 10
- 230000003014 reinforcing effect Effects 0.000 title 1
- 230000002708 enhancing effect Effects 0.000 claims abstract description 8
- 230000007423 decrease Effects 0.000 claims abstract description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000002861 polymer material Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 4
- 230000008021 deposition Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920013657 polymer matrix composite Polymers 0.000 description 1
- 239000011160 polymer matrix composite Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
本发明涉及一种换热管内强化换热与防垢除垢的低流阻转子，主要部件包括空心轴和螺旋叶片；所述的空心轴上设置有两个或多个螺旋叶片，螺旋叶片沿空心轴的轴向和周向等分排列；螺旋叶片表面光滑，外径略小于换热管内径；螺旋叶片的厚度保持一定，宽度呈渐变形状，在靠近空心轴时最大，然后逐渐减小。本发明中当管内流体从换热管进入时，流体垂直于螺旋叶片径向的作用力使转子绕空心轴旋转，管内流体形成三维螺旋流动状态，增强流体湍流强度，加剧边界层的扰动，不仅提高了传热效率，同时增强在线清洁效果，减少污垢在换热管内壁的沉积，延长了换热管及转子的使用寿命，并且转子结构简单，流动阻力小，安装方便，安全可靠。
The invention relates to a low-flow-resistance rotor for enhancing heat exchange and anti-scaling and descaling in a heat exchange tube. The main components include a hollow shaft and a helical blade; The axial and circumferential directions of the hollow shaft are equally arranged; the surface of the spiral blade is smooth, and the outer diameter is slightly smaller than the inner diameter of the heat exchange tube; the thickness of the spiral blade is kept constant, and the width is gradually changing, and it is the largest when it is close to the hollow shaft, and then gradually decreases. In the present invention, when the fluid in the tube enters from the heat exchange tube, the force of the fluid perpendicular to the radial direction of the helical blade makes the rotor rotate around the hollow shaft, and the fluid in the tube forms a three-dimensional spiral flow state, which enhances the fluid turbulence intensity and aggravates the disturbance of the boundary layer, not only It improves the heat transfer efficiency, enhances the online cleaning effect, reduces the deposition of dirt on the inner wall of the heat exchange tube, prolongs the service life of the heat exchange tube and the rotor, and the rotor has a simple structure, low flow resistance, easy installation, safety and reliability.
Description
技术领域 technical field
本发明涉及一种换热管内强化传热和防垢除垢的内插元件，特别涉及一种利用换热管内部传热流体作动力，实现强化传热与防垢除垢的低流阻转子。 The invention relates to an insert element for enhancing heat transfer and anti-scaling and descaling in a heat exchange tube, in particular to a low-flow-resistance rotor that utilizes the heat transfer fluid inside the heat exchange tube as power to realize enhanced heat transfer and anti-scaling and descaling .
背景技术 Background technique
管壳式换热器广泛应用在火电、核电、石油、化工、冶金、食品、轻工、船舶动力和航空航天等领域，但是管壳式换热器普遍存在传热管道内壁积污结垢的问题，导致管内换热效率大幅度降低，使传热性能降低变差，同时流体输送阻力增大，甚至管内严重堵塞无法使用。 Shell-and-tube heat exchangers are widely used in thermal power, nuclear power, petroleum, chemical industry, metallurgy, food, light industry, ship power, aerospace and other fields. Problems lead to a significant reduction in the heat transfer efficiency in the tube, making the heat transfer performance worse, and at the same time, the fluid delivery resistance increases, and even the tube is severely blocked and cannot be used.
换热管内插物防垢除垢技术是在换热管中放置内插物，迫使管内流体产生旋流或波动，从而破坏管内壁面附近流体边界层，阻止污垢的沉积，从而达到防垢除垢的目的，同时还具有强化换热的效果。中国专利申请号为ZL95236063.2公开了发明名称为“传热管内除垢防垢的清洗装置”的发明创造，该发明创造的技术方案由传热管内装设有与传热管大体相等长的扭曲带构成，扭曲带的径向尺寸小于传热管的内径，在传热管进液口端装有轴向固定架，其中部有进流孔，轴向固定架的头部有一个轴孔，轴孔内装有销轴，销轴的尾部与扭曲带连接。公开号为CN1424554的“双扰流螺旋式强化传热及自动除垢装置”中，公开了另一种纽带形式，该装置新增设了螺旋管，将纽带置于螺旋管中,靠通过螺旋管内的流体流动带动纽带旋转。公开号为CN2833494的“转子式自清洁强化传热装置”中，公开了一种由转子、支撑架、中心轴等构成的装置，支撑架固定在换热管的两端，中心轴固定在支撑架的两端，在支撑架的中间的中心轴上穿装一定数量的转子，转子在流体的作用下做旋转运动，从而达到强化传热以及在线除垢的效果。 Anti-scaling and descaling technology of inserts in heat exchange tubes is to place inserts in the heat exchange tubes to force the fluid in the tubes to swirl or fluctuate, thereby destroying the fluid boundary layer near the inner wall of the tubes and preventing the deposition of dirt, thereby achieving anti-scaling and descaling The purpose, but also has the effect of enhancing heat transfer. The Chinese patent application number is ZL95236063.2, which discloses an invention titled "cleaning device for descaling and anti-scaling in heat transfer tubes". Composed of twisted belts, the radial size of the twisted belt is smaller than the inner diameter of the heat transfer tube, and an axial fixing frame is installed at the liquid inlet end of the heat transfer tube, with an inlet hole in the middle, and a shaft hole at the head of the axial fixing frame , the shaft hole is equipped with a pin shaft, and the tail of the pin shaft is connected with the twisted belt. Publication No. CN1424554 "Double spoiler spiral heat transfer and automatic descaling device" discloses another form of ties. The device adds a helical tube, and the ties are placed in the helical tube. Fluid flow in the tube rotates the bond. In the "rotor type self-cleaning enhanced heat transfer device" with the publication number CN2833494, a device consisting of a rotor, a support frame, and a central shaft is disclosed. The support frame is fixed at both ends of the heat exchange tube, and the central shaft is fixed on the support. At both ends of the frame, a certain number of rotors are installed on the central shaft in the middle of the support frame, and the rotors rotate under the action of the fluid, so as to achieve the effect of enhanced heat transfer and online descaling.
上述专利提到的装置具有一定的防垢除垢与强化传热效果，但是螺旋纽带为一体式转动件，加工制造复杂，容易造成对换热管的刮伤，影响换热器使用寿命。“转子式自清洁强化传热装置”中的转子受力面积小，所受的驱动力小，不能更好的抑制结垢，传热效率以及在线清洗效果未达到最佳。 The device mentioned in the above patent has a certain effect of anti-scaling and descaling and enhanced heat transfer, but the spiral bond is an integral rotating part, which is complicated to process and manufacture, which is likely to cause scratches on the heat exchange tubes and affect the service life of the heat exchanger. The rotor in the "rotor-type self-cleaning enhanced heat transfer device" has a small stress area and a small driving force, which cannot better inhibit scaling, and the heat transfer efficiency and online cleaning effect are not optimal.
发明内容 Contents of the invention
本发明的目的是设计一种新结构的转子，该转子结构简单，流动阻力小，安装方便，并且具有自动在线防垢除垢和强化传热双重功能。 The purpose of this invention is to design a rotor with a new structure, which has simple structure, small flow resistance, convenient installation, and dual functions of automatic online scale prevention and descaling and enhanced heat transfer.
为达到上述目的，本发明提出的技术方案是：一种换热管内强化传热与防垢除垢的低流阻转子，其特征在于：主要部件包括空心轴和螺旋叶片。所述的空心轴上设置有两个或多个螺旋叶片，螺旋叶片沿空心轴的轴向和周向等分排列；螺旋叶片表面光滑，外径略小于换热管内径；螺旋叶片的厚度保持一定，宽度呈渐变形状，在靠近空心轴时最大，然后逐渐减小。 In order to achieve the above purpose, the technical solution proposed by the present invention is: a low-flow-resistance rotor for enhancing heat transfer and anti-scaling and descaling in the heat exchange tube, which is characterized in that: the main components include a hollow shaft and a helical blade. The hollow shaft is provided with two or more helical blades, and the helical blades are arranged in equal parts along the axial and circumferential directions of the hollow shaft; the surface of the helical blades is smooth, and the outer diameter is slightly smaller than the inner diameter of the heat exchange tube; the thickness of the helical blades remains Certainly, the width has a tapered shape, maximum near the hollow shaft, and then gradually decreases.
所述螺旋叶片在空心轴的轴向截面上投影是椭圆弧或圆弧曲线，并且每相邻两个叶片绕空心轴旋转一周所形成的空间前后相连。 The projection of the helical blade on the axial section of the hollow shaft is an elliptical arc or a circular arc curve, and the space formed by every two adjacent blades rotating around the hollow shaft once is connected back and forth.
所述的螺旋叶片和空心轴是由高分子材料、高分子基复合材料、金属或者陶瓷材料制作而成。 The spiral blade and the hollow shaft are made of polymer material, polymer matrix composite material, metal or ceramic material.
所述空心轴两端有同轴结构,每个转子的空心轴的头部和前一个转子的空心轴的尾部对中并配合,同轴结构可以是窝球、万向节或卡扣。 Both ends of the hollow shaft have coaxial structures, the head of the hollow shaft of each rotor is centered and matched with the tail of the hollow shaft of the previous rotor, and the coaxial structure can be socket balls, universal joints or buckles.
本发明的有益效果是：1、当管内流体从换热管进入时，流体垂直于螺旋叶片径向的作用力使转子绕空心轴旋转，管内流体形成三维螺旋流动状态，增强流体湍流强度，加剧边界层的扰动，不仅提高了传热效率，同时增强在线清洁效果，减少污垢在换热管内壁的沉积，延长了换热管及转子的使用寿命；2、转子的螺旋叶片在旋转过程中对换热管内壁起到轻微刮削作用，会对换热管内壁污垢进行清除，这样有利于延长整个装置的使用周期，减少清洗频率；3、本发明转子结构简单，流动阻力小，安装方便，安全可靠。 The beneficial effects of the present invention are: 1. When the fluid in the tube enters from the heat exchange tube, the force of the fluid perpendicular to the radial direction of the helical blade makes the rotor rotate around the hollow shaft, and the fluid in the tube forms a three-dimensional spiral flow state, which enhances the fluid turbulence intensity and intensifies The disturbance of the boundary layer not only improves the heat transfer efficiency, but also enhances the online cleaning effect, reduces the deposition of dirt on the inner wall of the heat exchange tube, and prolongs the service life of the heat exchange tube and the rotor; The inner wall of the heat exchange tube has a slight scraping effect, which will remove the dirt on the inner wall of the heat exchange tube, which is beneficial to prolong the service life of the entire device and reduce cleaning frequency; 3. The rotor of the present invention has simple structure, small flow resistance, convenient installation and safety reliable.
附图说明 Description of drawings
图1为本发明一种换热管内强化传热与防垢除垢的低流阻转子结构示意图。 Fig. 1 is a schematic diagram of the structure of a low-flow-resistance rotor for enhanced heat transfer and scale prevention and descaling in heat exchange tubes according to the present invention.
图2为图1的俯视图。 FIG. 2 is a top view of FIG. 1 .
图3为本发明一种换热管内强化传热与防垢除垢的低流阻转子结构三维示意图。 Fig. 3 is a three-dimensional schematic diagram of the structure of a low-flow-resistance rotor for enhanced heat transfer and scale prevention and descaling in the heat exchange tube of the present invention.
图4为本发明一种换热管内强化传热与防垢除垢的低流阻转子安装结构示意图。 Fig. 4 is a schematic diagram of the installation structure of a low-flow-resistance rotor for enhanced heat transfer and scale prevention and descaling in the heat exchange tube of the present invention.
图中，1-空心轴、2-螺旋叶片、3-换热管、4-限位件、5-支撑架、6-凸台、7-凹槽、8-转轴。 In the figure, 1-hollow shaft, 2-helical blade, 3-heat exchange tube, 4-limiting member, 5-support frame, 6-boss, 7-groove, 8-rotating shaft.
具体实施方式 Detailed ways
本发明涉及一种换热管内强化传热与防垢除垢的低流阻转子的一种实施方法，如图4所示，强化传热装置包括转子、限位件4、换热管3、支撑架5和转轴8，转轴8将若干转子串联在一起，多个转子可由限位件4分为几组转子串，支撑架5固定在换热管3两端，转轴8的两端分别固定在支撑架5上，本发明的转子由若干螺旋叶片2固定在空心轴1表面上组成的。两个相邻转子中，一个转子的空心轴1头部的凸台6与另一个转子空心轴1尾部的凹槽7相结合从而起到连接和调整使之同轴的作用，同轴结构除凸台结构外，还有球窝结构、万向节结构、卡扣结构等，对于转子运行同轴性不高的场合也可以是简单的平面结构。 The present invention relates to an implementation method of a low-flow-resistance rotor for enhanced heat transfer and scale prevention and descaling in a heat exchange tube. As shown in FIG. The support frame 5 and the rotating shaft 8, the rotating shaft 8 connects several rotors in series, and the multiple rotors can be divided into several groups of rotor strings by the limiter 4, the supporting frame 5 is fixed at both ends of the heat exchange tube 3, and the two ends of the rotating shaft 8 are respectively fixed On the support frame 5, the rotor of the present invention consists of several helical blades 2 fixed on the surface of the hollow shaft 1. Among two adjacent rotors, the boss 6 at the head of the hollow shaft 1 of one rotor is combined with the groove 7 at the tail of the hollow shaft 1 of the other rotor so as to connect and adjust them to be coaxial. The coaxial structure except In addition to the boss structure, there are also ball-and-socket structures, universal joint structures, snap-fit structures, etc. For occasions where the coaxiality of the rotor is not high, it can also be a simple planar structure.
本发明一种换热管内强化传热与防垢除垢的低流阻转子，如图1至图3所示，转子的空心轴1截面形状为空心圆柱形；图1为本发明一种换热管内强化传热与防垢除垢的低流阻转子结构示意图，空心轴1上有四个螺旋叶片2，四个螺旋叶片4在空心轴1表面沿轴向和周向等分排列分布；图2为本发明一种换热管内强化传热与防垢除垢的低流阻转子结构俯视图，螺旋叶片2的宽度呈渐变形状，在靠近空心轴1时最大，然后逐渐减小；图3为本发明一种换热管内强化传热与防垢除垢的低流阻转子三维示意图，换热管3内的流体在流动过程中对转子产生轴向力和转动力矩，管内流体形成三维螺旋型流动状态，增强了流体的湍流强度，减薄了边界层厚度，并对管壁起到了轻微刮削作用，由此达到强化传热和防垢除垢的目的。 The present invention is a low-flow-resistance rotor that enhances heat transfer and scale prevention and descaling in heat exchange tubes. As shown in Figures 1 to 3, the hollow shaft 1 of the rotor has a hollow cylindrical cross-section; Schematic diagram of the structure of a low-flow-resistance rotor for enhanced heat transfer and anti-scaling and descaling in the heat pipe. There are four helical blades 2 on the hollow shaft 1, and the four helical blades 4 are equally arranged on the surface of the hollow shaft 1 along the axial and circumferential directions; Fig. 2 is a top view of a low-resistance rotor structure for enhanced heat transfer and anti-scaling and descaling in the heat exchange tube of the present invention. The width of the spiral blade 2 is in a gradual shape, which is the largest when it is close to the hollow shaft 1, and then gradually decreases; Fig. 3 It is a three-dimensional schematic diagram of a low-flow-resistance rotor that enhances heat transfer and scale prevention and descaling in the heat exchange tube of the present invention. The fluid in the heat exchange tube 3 generates axial force and rotational torque on the rotor during the flow process, and the fluid in the tube forms a three-dimensional spiral Type flow state enhances the turbulence intensity of the fluid, reduces the thickness of the boundary layer, and has a slight scraping effect on the tube wall, thereby achieving the purpose of enhancing heat transfer and anti-scaling and descaling.
本发明涉及的一种换热管内强化传热与防垢除垢的低流阻转子，其单个转子的长度、旋转外圆直径和螺旋叶片所倾斜的角度等参数，可根据传热管内径、管内介质流速等工作条件和制造成本等情况来确定，相邻转子之间既可以采取同步旋转的连接方式，也可以采用各自独立旋转的结构。 The invention relates to a low-flow-resistance rotor for enhancing heat transfer and anti-scaling and descaling in the heat exchange tube. The working conditions such as the flow rate of the medium in the pipe and the manufacturing cost are determined. The adjacent rotors can be connected in a synchronous rotation mode or in a structure of independent rotation.
Claims (4)
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| CN205027195U (en) * | 2015-10-12 | 2016-02-10 | 郑州大学 | Low flow resistance rotor of enhanced heat transfer and scale control scale removal in heat exchange tube |
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| CN111299299A (en) * | 2019-12-24 | 2020-06-19 | 山东丰获机械制造有限公司 | Shaft stirring wing structure of chemical tank for processing and treating culture waste and slaughter byproduct feather |
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| CN111299299B (en) * | 2019-12-24 | 2023-08-22 | 山东丰获机械制造有限公司 | Central shaft stirring wing structure of chemical tank for processing and treating culture wastes and slaughter byproduct feathers |
| CN111156854A (en) * | 2020-02-25 | 2020-05-15 | 西安绿动透平技术有限公司 | Automatic cleaning robot for tube inner wall surface of tube shell type heat exchanger |
| CN111306982A (en) * | 2020-03-30 | 2020-06-19 | 西安绿动透平技术有限公司 | Hydraulically-driven automatic cleaning robot system for inner wall surface of tube of shell-and-tube heat exchanger |
| CN112629003A (en) * | 2020-11-26 | 2021-04-09 | 北京华彦邦科技股份有限公司 | Anti-ice-blockage heat exchanger and dynamic ice cold storage system |
| CN113203303A (en) * | 2021-04-26 | 2021-08-03 | 淮阴工学院 | Cleaning and scale preventing device for heat exchanger, heat exchanger and cleaning and scale preventing method for heat exchanger |
| CN113375499A (en) * | 2021-06-18 | 2021-09-10 | 宝武集团鄂城钢铁有限公司 | Automatic deslagging device of pipeline, heat exchanger pipe and self-cleaning method |
| RU226385U1 (en) * | 2024-03-12 | 2024-05-31 | Кирилл Андреевич Чинцов | In-pipe device for disrupting laminar flow in a heating radiator |
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Application publication date: 20151209 |
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