CN102128559B - Low driving force self-cleaning and heat transfer enhancement rotor in heat exchange tube - Google Patents
Low driving force self-cleaning and heat transfer enhancement rotor in heat exchange tube Download PDFInfo
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- CN102128559B CN102128559B CN 201010033800 CN201010033800A CN102128559B CN 102128559 B CN102128559 B CN 102128559B CN 201010033800 CN201010033800 CN 201010033800 CN 201010033800 A CN201010033800 A CN 201010033800A CN 102128559 B CN102128559 B CN 102128559B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 25
- 230000003416 augmentation Effects 0.000 claims description 25
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000725 suspension Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000003373 anti-fouling effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a low driving force self-cleaning and heat transfer enhancement rotor in a heat exchange tube, which is particularly suitable for the heat transfer enhancement of a viscous fluid of the tube side. The rotor comprises a hollow cylinder and blades, wherein each blade is of a spiral structure; the root part of the outer surface of the blade is tangential with the edge of the hollow cylinder; and when a fluid axially enters from the heat exchange pipe, the acting force of the fluid vertical to the radial direction of the blade enables the rotor to rotate around a rotary shaft. According to the invention, as the root part of the blade is tangential with the edge of the hollow cylinder, the acting area of the fluid on the blade is increased. The larger the radius of the hollow cylinder is, the more obvious the effect becomes. Consequently, if the rotation driving force applied to the rotor is increased, the rotor is more favorable for the heat transfer enhancement in the case of relatively large viscosity of a medium in the heat exchange pipe or low kinetic energy of the fluid. As the outer surface of the root part of the rotor is tangential with the edge of the hollow cylinder to form a smooth curve, the outer surface of the blade does not scale easily, thereby prolonging the using period of the entire device and reducing the cleaning frequency.
Description
Technical field:
The present invention relates to for augmentation of heat transfer in the equipment heat exchanger tubes such as shell-and-tube heat exchanger, heat exchange reactor, condenser and self-cleaning interior inserted component.This element can be widely used on the shell-and-tube heat transmission equipment and consersion unit of industries such as thermal power generation, petrochemical industry, food, pharmacy, light industry, metallurgy, boats and ships, especially with in the augmentation of heat transfer and cleaning apparatus for self of heat-transfer pipe inner fluid kinetic energy as power.
Background technology:
The heat exchanger tube encrustation of shell-and-tube heat exchanger can cause heat transfer efficiency decline, fluid flow resistance to increase, can blocking pipe when serious.
In existing method, spiral band is to utilize the kinetic energy of fluid to realize the rotation of self as driving force, reaches the purpose of on-line cleaning and augmentation of heat transfer with this.The patent No. is: ZL95236063.2, and name is called in " cleaning device of descaling and antiscaling in the heat-transfer pipe ", discloses the structure of this device, spiral band places in the heat exchanger tube, and pipe end is free arbor hole, and bearing pin is housed, the tail end of bearing pin is connected with the tie head, belongs to an end fixture.Publication number is CN1424554's in " the spiral augmentation of heat transfer of dual turbulent and automatic descaling apparatus ", discloses another kind of tie form, and this device has been newly established helix tube, and tie is placed helix tube, drives the tie rotation by flowing by the fluid in the helix tube.Publication number is CN2833494's in " rotator type cleaning and heat-transfer enhancing device ", a kind of device that is made of fixed mount, rotor, steel wire rope and stay pipe etc. is disclosed, fixed mount is placed in the heat exchanger tube two ends, steel wire rope is by the fixed mount axis hole, two ends are fixed with rivet, the centre of rotor hole is passed steel wire rope and is arranged along the heat exchanger tube axis, and rotor rotates under the fluid effect, thereby reaches the purpose of augmentation of heat transfer and on-line cleaning.The patent No. is in 200620172805.5 the low flow resistance rotor of cleaning and heat-transfer enhancing " heat-transfer pipe in ", disclose a kind of new-type rotor, it is to be made of hollow shaft and blade, and it is same skewed that each blade becomes with hollow shaft, adjacent blades is end to end, and this structure convection cell resistance reduces.
The above-mentioned several achievements that relate to all have certain augmentation of heat transfer effect and antifouling scale removal ability, have also obtained application in specific field.But spiral band is the integral type tumbler, if tie add have some setbacks man-hour straight or heat exchanger tube straight inadequately behind expanded joint, all will influence the rotation of whole tie, it is serious to exchange the heat pipe scratch; The moment that drives tie when fluid flows is also very big, has caused unnecessary energy loss; The bearing pin life-span that one end is fixed is very short, and whole cooperative reinforcing heat-transfer effect of tie generation is not remarkable in addition.Rotor in " rotator type cleaning and heat-transfer enhancing device " leans against the vane stress that stretches out on the hollow cylinder surface and rotates, because intersect on root of blade and hollow cylinder surface, lifting surface area is little, and therefore suffered driving force is little.
Summary of the invention:
The objective of the invention is to design a kind of rotor of new-type structure, guarantee that rotor can rotate smoothly, especially well rotation under the little situation of resisting medium or fluid dynamic energy, and can improve the turbulent extent of fluid, thus reach the purpose of automatically cleaning and augmentation of heat transfer.
For achieving the above object, the technical scheme that the present invention proposes is: low driving force automatically cleaning and augmentation of heat transfer rotor in the heat exchanger tube, and rotor is made up of hollow cylinder and blade, and each blade is the shape structure in the shape of a spiral, blade section evenly is fixed on the hollow cylinder, and becomes one with it.The outer surface of blade and hollow cylinder edge are tangent, and the axis of phase tangent trajectory and hollow cylinder is not parallel, make blade be a curved surface shape, form stopping of convection cell axial flow, and rotor obtains rotational power.Rotor is installed in the rotating shaft, and the inner surface of rotor blade is upstream face, and rotor and suspension member are positioned in the heat exchanger tube, and axial restraint is carried out by the centre bore of suspension member respectively in the two ends of rotating shaft.
When fluid passes through rotor, traditional blade surface and hollow cylinder edge intersect, and the edge of the outer surface of rotor blade of the present invention and hollow cylinder is tangent, vane thickness is thinner, the active area that fluid is acted on the blade increases, increase driving force, made operate as normal in the medium that rotor can be big in viscosity or fluid dynamic energy is little, played the ideal effect of augmentation of heat transfer and antifouling scale removal.
Link to each other before and after the space that each adjacent blades rotates a circle inswept centered by hollow cylinder; Several blades are fixed on the hollow cylinder surface, and blade is in the axially five equilibrium arrangement of hollow cylinder surface.Every adjacent two blades pivot and link to each other before and after all formed spaces.
The hollow cylinder of described rotor is head near the water inlet oral-lateral, and there is coaxial configuration at the hollow cylinder two ends, and the afterbody centering of the head of the hollow cylinder of each rotor and the hollow cylinder of previous rotor also cooperates, and each rotor can freely rotate.Coaxial configuration can be the spherical formula of conical form, nest, bucking ladder form, universal joint form or buckle form.
The blade that is fixed on the hollow cylinder surface can arrange hollow structure, with reduce blade the weight in the rotating shaft and in heat exchanger tube occupied volume.
Blade projection on cross section can be to be generated by elliptic arc or circular curve; The outer surface of rotor blade and hollow cylinder edge are tangent, and inner surface and hollow cylinder edge intersect; Also can be that inner surface, outer surface are all tangent with the hollow cylinder edge, the thickness that forms between blade inner surface and outer surface be determined according to the stressed requirement of strength of rotor.The tangent structure of outer surface can make vacuum side of blade smooth less scaling, and inner surface is also less scaling because there being medium to wash away.
The blade of rotor and hollow cylinder are by macromolecular material, polymer-based composite, metal or ceramic material.
The invention has the beneficial effects as follows:
1, than other rotor, because rotor involved in the present invention has bigger lifting surface area, bigger driving force be can obtain, so in the slower fluid of viscous fluid or flow velocity, still can obtain bigger driving force, antifouling scale removal and augmentation of heat transfer so more are conducive to; 2, fluid increases the active area of blade, under the reaction force of blade, fluid can be more effective along blade tip to around diffusion, increased the turbulent extent of fluid, more be conducive to augmentation of heat transfer.3, because the outer surface of this rotor root and the tangent smooth surface that is in edge of hollow cylinder make the outer surface of blade less scaling, the life cycle that is conducive to prolong whole device like this reduces cleaning frequency.
Rotor of the present invention is installed in the heat exchanger tube, according to concrete heat exchanger tube length, with rotating shaft with several rotor inlines together, be through in the heat exchanger tube, utilize the two ends of suspension member countershaft to carry out axial restraint then, when fluid flows through blade, rotor is had tangential force perpendicular to radially, rotor is rotated around the shaft, will remove by heat exchanging inside pipe wall dirt; Medium flow field in managing is carried out disturbance, be formed with the turbulent flow that is beneficial to augmentation of heat transfer.Can also be according to actual needs, arrange that sky further reduces rotor weight and occupied space in heat exchanger tube at blade.
Description of drawings
Fig. 1 is low driving force automatically cleaning in the heat exchanger tube of the present invention and augmentation of heat transfer rotor structure schematic diagram.
Fig. 2 is the plan structure enlarged diagram of Fig. 1.
Fig. 3 is low driving force automatically cleaning in the heat exchanger tube of the present invention and augmentation of heat transfer rotor schematic three dimensional views.
Fig. 4 is low driving force automatically cleaning in the heat exchanger tube of the present invention and augmentation of heat transfer rotor blade hollow structure schematic diagram.
Fig. 5 is the plan structure enlarged diagram of Fig. 4.
Fig. 6 is low driving force automatically cleaning in the heat exchanger tube of the present invention and the saturating empty schematic three dimensional views of augmentation of heat transfer rotor blade.
Fig. 7 is under the thin slice situation for the hypothesis rotor blade, existing rotor and the comparison of the rotor that the present invention relates in the heat exchanger tube cross-sectional direction
Fig. 8 is the mounting structure schematic diagram of low driving force automatically cleaning in the heat exchanger tube of the present invention and augmentation of heat transfer rotor.
Among the figure, blade, 11-outer surface, the 12-inner surface of 1-hollow cylinder, 2-blade, 3-suspension member, 4-rotating shaft, 5-heat exchanger tube, 6-trapezoid boss, 7-hollow structure, 8 trapezoidal grooves, 9-rivet, the existing rotor of 10-
The specific embodiment
As shown in Figure 8, a kind of examples of implementation of low driving force automatically cleaning and augmentation of heat transfer rotor in a kind of heat exchanger tube that the present invention relates to, rotor is made up of hollow cylinder 1 and blade 2, blade 2 piecewise uniforms are fixed on the hollow cylinder 1, the outer surface 11 of blade is tangent with hollow cylinder 1 edge, and the axis of phase tangent trajectory and hollow cylinder 1 is not parallel, makes blade be a curved surface shape, form stopping of convection cell axial flow, rotor obtains rotational power.Rotor of the present invention is installed in the rotating shaft 4, is positioned in the heat exchanger tube 5 with suspension member 3, and suspension member 3 is fixed on the heat exchanger tube two ends, and the two ends of rotating shaft 4 are separately fixed on the suspension member 3 by rivet 9.
Fig. 1 to shown in Figure 6 be that hollow cylinder 1 cross sectional shape of rotor of the present invention is hollow cylinder, wherein Fig. 4 arranges hollow structure 7 to the surface of blade 2 shown in Figure 6.
The head of each hollow cylinder 1 and afterbody arrange trapezoid boss 6 and trapezoidal groove 8 respectively, several rotors are installed in two rotating shafts 4 between the suspension member 3, two adjacent rotor one of them hollow cylinder 1 head trapezoid boss 6 and the trapezoidal groove 8 coaxial centerings of hollow cylinder 1 afterbody of another rotor cooperate, coaxial configuration can also be circular cone mode, buckle mode, nest ball mode or universal joint mode except trapezium structure.
Because fluid increases the active area of blade 2, under the reaction force of blade 2, fluid can be more effectively along blade 2 tops to around diffusion, increased the turbulent extent of fluid, more be conducive to augmentation of heat transfer; Rotor diameter is slightly less than the internal diameter of heat exchanger tube 5, the internal diameter of rotor hollow cylinder 1 is slightly larger than the external diameter of rotating shaft 4, therefore rotor involved in the present invention still can obtain bigger driving force in the slower fluid of viscous fluid or flow velocity, so more is conducive to antifouling scale removal and augmentation of heat transfer;
Fig. 7 is the comparison diagram directly perceived of existing rotor and this invention rotor, suppose that other conditions are identical except blade, blade is a thin slice curved surface, then the active area of fluid on each blade 2 of rotor of the present invention in the projected length on the heat exchanger tube cross section than the approximate radius R that increases to hollow cylinder of the projected length on the heat exchanger tube cross section of the blade 10 of illustrated existing rotor, if a rotor has 4 blades, then the length of the fluid active area projection on the heat exchanger tube cross section on each rotor blade is similar to increases 4R.The radius R of hollow cylinder is more big, and the driving force of increase is more big, and effect is more obvious.
Claims (4)
1. low driving force automatically cleaning and augmentation of heat transfer rotor in the heat exchanger tube, constituted by hollow cylinder and blade, each blade is the shape structure in the shape of a spiral, blade section evenly is fixed on the hollow cylinder, it is characterized in that: the root of blade outer surface and hollow cylinder edge are tangent, and the axis of phase tangent trajectory and hollow cylinder is not parallel; Several blades are fixed on the surface of hollow cylinder, blade on hollow cylinder surface axially five equilibrium arrange, every adjacent two blades pivot and link to each other before and after all formed spaces, blade projection on cross section is to be generated by elliptic arc or circular curve; The inner surface of blade and hollow cylinder edge are tangent.
2. low driving force automatically cleaning and augmentation of heat transfer rotor in the heat exchanger tube according to claim 1, it is characterized in that: there is coaxial configuration at the hollow cylinder two ends, the afterbody centering of the head of the hollow cylinder of each rotor and the hollow cylinder of previous rotor also cooperates, coaxial configuration is the spherical formula of conical form, nest, bucking ladder form, universal joint form or buckle form, and blade arranges hollow structure.
3. low driving force automatically cleaning and augmentation of heat transfer rotor in the heat exchanger tube according to claim 1, it is characterized in that: the blade of rotor and hollow cylinder are by macromolecular material, polymer-based composite, metal or ceramic material.
4. low driving force automatically cleaning and augmentation of heat transfer rotor in the heat exchanger tube according to claim 1, it is characterized in that: blade is provided with hollow structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010033800 CN102128559B (en) | 2010-01-14 | 2010-01-14 | Low driving force self-cleaning and heat transfer enhancement rotor in heat exchange tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010033800 CN102128559B (en) | 2010-01-14 | 2010-01-14 | Low driving force self-cleaning and heat transfer enhancement rotor in heat exchange tube |
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| Publication Number | Publication Date |
|---|---|
| CN102128559A CN102128559A (en) | 2011-07-20 |
| CN102128559B true CN102128559B (en) | 2013-08-14 |
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| CN 201010033800 Expired - Fee Related CN102128559B (en) | 2010-01-14 | 2010-01-14 | Low driving force self-cleaning and heat transfer enhancement rotor in heat exchange tube |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645121A (en) * | 2012-05-17 | 2012-08-22 | 北京化工大学 | Multi-structure combined blade rotor in heat exchange tube |
| CN103217055B (en) * | 2013-05-02 | 2014-07-09 | 北京化工大学 | Opposite-rotation-direction combined rotor in heat exchange tube |
| CN103411474B (en) * | 2013-08-27 | 2014-12-31 | 北京化工大学 | High flow disturbance sphere rotor inside heat exchange pipe |
| CN103977995B (en) * | 2014-04-30 | 2016-03-02 | 盐城工学院 | A kind of rotation dredger for the anti-alluvial of pipeline |
| CN105135932A (en) * | 2015-10-12 | 2015-12-09 | 郑州大学 | Low-flow-resistance rotor for reinforcing heat transfer and scale removal/prevention in heat exchange tube |
| CN106370272A (en) * | 2016-08-31 | 2017-02-01 | 许伟 | Magnetic flip plate liquid level meter with fins and floating ball |
| CN106403699B (en) * | 2016-11-14 | 2018-06-26 | 北京化工大学 | Magnetic bionic blade rotor in heat exchanger tube |
| CN107975947A (en) * | 2017-11-15 | 2018-05-01 | 韦治东 | The processing method of vane type solar energy heat collection pipe |
| CN111450748A (en) * | 2020-04-09 | 2020-07-28 | 上海交通大学 | Method for realizing passive enhanced heat transfer and solute mixing in micro-channel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB586314A (en) * | 1944-03-31 | 1947-03-14 | John Graves Mckean | Improvements in and relating to heat exchange apparatus |
| US4858682A (en) * | 1986-11-17 | 1989-08-22 | Sandvik Ab | Cylinder for heat exchangers |
| EP0595422A1 (en) * | 1992-10-29 | 1994-05-04 | Gerstenberg & Agger A/S | Blade system for a scraped surface heat exchanger |
| CN2214239Y (en) * | 1995-01-10 | 1995-12-06 | 湘潭大学 | Flushing device for descaling and scale prevention of heat transfer tube |
| CN1424554A (en) * | 2003-01-05 | 2003-06-18 | 浙江大学 | Dual turbulent spiral forced heat exchanging and automatic descaling device |
| CN2833494Y (en) * | 2005-10-10 | 2006-11-01 | 黄伟 | Rotor type self-cleaning enhanced heat transfer device |
| CN101210791A (en) * | 2006-12-29 | 2008-07-02 | 北京华夏英蓝科技发展有限公司 | Self-cleaning reinforcement heat transfer low flow resistance rotor in heat-transfer pipe |
-
2010
- 2010-01-14 CN CN 201010033800 patent/CN102128559B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB586314A (en) * | 1944-03-31 | 1947-03-14 | John Graves Mckean | Improvements in and relating to heat exchange apparatus |
| US4858682A (en) * | 1986-11-17 | 1989-08-22 | Sandvik Ab | Cylinder for heat exchangers |
| EP0595422A1 (en) * | 1992-10-29 | 1994-05-04 | Gerstenberg & Agger A/S | Blade system for a scraped surface heat exchanger |
| CN2214239Y (en) * | 1995-01-10 | 1995-12-06 | 湘潭大学 | Flushing device for descaling and scale prevention of heat transfer tube |
| CN1424554A (en) * | 2003-01-05 | 2003-06-18 | 浙江大学 | Dual turbulent spiral forced heat exchanging and automatic descaling device |
| CN2833494Y (en) * | 2005-10-10 | 2006-11-01 | 黄伟 | Rotor type self-cleaning enhanced heat transfer device |
| CN101210791A (en) * | 2006-12-29 | 2008-07-02 | 北京华夏英蓝科技发展有限公司 | Self-cleaning reinforcement heat transfer low flow resistance rotor in heat-transfer pipe |
Non-Patent Citations (2)
| Title |
|---|
| 螺旋转子的结构参数对管内换热影响的数值研究;邢程，孟继安，李志信;《化工学报》;20091231;第60卷(第12期);2969-2974 * |
| 邢程，孟继安，李志信.螺旋转子的结构参数对管内换热影响的数值研究.《化工学报》.2009,第60卷(第12期),2969-2974. |
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| CN102128559A (en) | 2011-07-20 |
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