CN106903197A - A kind of preparation method and application of high pressure resistant outer expanding helical bellows enhanced heat transfer component - Google Patents
A kind of preparation method and application of high pressure resistant outer expanding helical bellows enhanced heat transfer component Download PDFInfo
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- CN106903197A CN106903197A CN201710108315.1A CN201710108315A CN106903197A CN 106903197 A CN106903197 A CN 106903197A CN 201710108315 A CN201710108315 A CN 201710108315A CN 106903197 A CN106903197 A CN 106903197A
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- heat transfer
- high pressure
- pressure resistant
- outer expanding
- helical bellows
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
- B21D15/10—Corrugating tubes transversely, e.g. helically by applying fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/06—Tubular elements of cross-section which is non-circular crimped or corrugated in cross-section
Abstract
A kind of preparation method and application of high pressure resistant outer expanding helical bellows enhanced heat transfer component, it belongs to the engineer applied technical field of thermal conduction study, and in particular to a kind of preparation method and application of heat transfer element.The purpose of the present invention will solve the presence of existing concave helical bellows heat transfer element and cannot meet to be run steadily in the long term under high-pressure fluid condition of work, and make the problem that circulation area in pipe reduces significantly.Preparation method：Using heavy wall light pipe, hydraulic forming is formed in a mold；Mold clamping force increases step by step with the time during hydraulic forming；Interior pressure increases step by step with the time during hydraulic forming.High pressure resistant outer expanding helical bellows enhanced heat transfer component is applied in shell-and-tube heat exchanger or double pipe heat exchanger as heat transfer element.The high pressure resistant outer expanding helical bellows enhanced heat transfer component of the present invention is applied in nuclear power gas vapour combined cycle system as the heat transfer element of shell-and-tube heat exchanger.
Description
Technical field
The invention belongs to the engineer applied technical field of thermal conduction study, and in particular to a kind of preparation method of heat transfer element and should
With.
Background technology
Heat exchanger as heat transfer and exchange equipment, be widely used in the energy, power, oil, chemical industry, metallurgy,
In the industries such as light industry.It is not only essential intermediate equipment in technological process, is also that exploitation secondary energy sources realize that waste heat is returned
Receive the visual plant of energy-saving and emission-reduction.Exploitation design safety, the reliable enhanced heat transfer component with high efficient heat exchanging performance are to saving
It is very important for heat exchanger metal consumption, investment and space.
Concave helical bellows heat transfer element is applied to heat transmission equipment abroad using many as enhanced heat transfer component
Year.Processed by carrying out the techniques such as punching press, rolling to light pipe, make tube wall face that there is corrugated form, not only increase heat-transfer area
Product, and disturbance is increased to managing inside and outside fluid, improve the coefficient of heat transfer.
Replace common light pipe to be a kind of bilateral intensified heat transfer method using concave helical bellows heat transfer element, can make
The fluid of pipe both sides produces the Secondary Flow and spiral flow for being conducive to heat exchange, bilateral heat transfer effect is improved.
Concave helical bellows heat transfer element common at present is punching press, rolling and forms, and is characterized in processing technology
Simple cost is relatively low, although also have obvious effect in terms of increasing heat exchange area and improving heat exchange property.But use concave
Helical bellows has following weak point：1st, concentrated stress is easily produced in process, further lossless spy is needed after shaping
Wound and hydraulic pressure detection, and cannot meet and run steadily in the long term under high-pressure fluid condition of work.2nd, indent ripple knot makes circulation in pipe
Area reduces significantly, causes the resistance of tube fluid to be lifted clearly, increased the loss of pump work.
The content of the invention
The purpose of the present invention will solve the presence of existing concave helical bellows heat transfer element cannot be met in high-pressure fluid
Run steadily in the long term under condition of work, and make the problem that circulation area in pipe reduces significantly, and a kind of high pressure resistant outer expanding is provided
The preparation method and application of helical bellows enhanced heat transfer component.
A kind of preparation method of high pressure resistant outer expanding helical bellows enhanced heat transfer component is completed according to the following steps：
Using heavy wall light pipe, hydraulic forming is formed in a mold, and the hydraulic forming time is 45s, that is, obtain high pressure resistant outer expanding
Helical bellows enhanced heat transfer component；Mold clamping force increases step by step with the time during hydraulic forming, if the time is t, unit is
S, mold clamping force is F, and unit is kN, as 0≤t ＜ 10s, F=450t；As 10≤t ＜ 40s, F=500t/3+8500/3；When
During 40≤t≤45s, F=9500；Interior pressure increases step by step with the time during hydraulic forming, if the time is T, unit is s,
Mold clamping force is P, and unit is MPa, as 0≤T ＜ 10s, P=12T；As 10≤t ＜ 40s, P=6T+60；As 40≤t≤45s
When, P=300；
The high pressure resistant outer expanding helical bellows enhanced heat transfer component is outer expanding helical bellows, the outer expanding spiral shell
Rotation bellows is made up of straight length and evagination ripple knot, the evagination ripple knot rotated in the shape of a spiral around straight length it is progressive, it is described outer
The ripple knot chamfering of convex ripple knot is 2.5mm, and the ripple knot of the evagination ripple knot is highly 0.5mm~2.5mm, the ripple of the evagination ripple knot
Knot spacing is 10mm~30mm, and the ripple knot width of the evagination ripple knot is 8mm.
The principle of the invention：The high pressure resistant outer expanding helical bellows enhanced heat transfer component, its helical corrugation wall makes pipe
Interior outer fluid produce with flow to the de- vortex of vertical transverse direction and with flow to identical longitudinal spiral stream, acted in two kinds of eddies
Under destroy boundary layer development and increased heat and mass exchange near wall between fluid and core fluid, realize
Enhanced heat exchange is acted on.
A kind of application of high pressure resistant outer expanding helical bellows enhanced heat transfer component, high pressure resistant outer expanding helical bellows is strong
Change heat transfer element as heat transfer element, be applied in shell-and-tube heat exchanger or double pipe heat exchanger.
Advantage of the present invention：First, the high pressure resistant outer expanding helical bellows enhanced heat transfer component of the present invention is a kind of high efficient heat exchanging
Element, can improve the coefficient of heat transfer of heat exchanger, so as to reduce the metal consumption and economic investment of heat exchanger, and reduce it and account for
Ground space；2nd, heat exchange element mold clamping force and interior pressure during hydraulic forming increases step by step with the time, and this mold clamping force adds
Load mode only applies maximum clamping force in truing phase, is prevented effectively from mould and bears larger stress for a long time, it is to avoid be large quantities of
Cause mould fatigue rupture in amount production process, not only outer expanding helical bellows maximum shaping pressure is up to 290MPa, and adds
Without test verifications such as extra flaw detection, hydraulic pressure after work shaping, with high voltage bearing characteristic, can be in high-temperature, high pressure fluid environment
Middle safe handling；3rd, it is average to the power that wall applies by oil during hydraulic forming, so the wall after shaping
Smoother, because chamfer design makes helical corrugation wall have good stream shape, can be significantly reduced flow resistance
Increase；And outer expanding helical bellows can make inside and outside two side liquid produce Secondary Flow and longitudinal spiral perpendicular to flow direction to flow,
The development in boundary layer is destroyed under two kinds of eddy effects and the caloic between near wall fluid and core fluid is increased
Exchange, realize that enhanced heat exchange is acted on.The airflow design of wall greatly reduces resistance while ensureing that heat transfer property is improved
The lifting of power performance, and to preventing the dust accretions in flue gas from having positive effect.4th, by helical bellows internal high pressure forming
Thickness Distribution curve in deformed area is relatively uniform afterwards, and maximum reduction is not higher than 22%, with high voltage bearing feature, after shaping
Without test verifications such as extra flaw detection, hydraulic pressure, such as nuclear power, chemical industry, electric power station system high-temperature high-pressure work environment are applicable to.
5th, the high pressure resistant outer expanding helical bellows enhanced heat transfer component of the present invention is applied to core as the heat transfer element of shell-and-tube heat exchanger
In electrically-vapour combined cycle system, single tube heat exchange property is up to 1.7 times of light pipe, and complex heat transfer performance is maximum up to 1.267.
Brief description of the drawings
Fig. 1 is the structural representation of high pressure resistant outer expanding helical bellows enhanced heat transfer component described in specific embodiment one
Figure；
Fig. 2 is the partial enlarged drawing of high pressure resistant outer expanding helical bellows enhanced heat transfer component described in embodiment 1, in figure not
The straight length 1 that deformed area is represented, deformed area represents evagination ripple knot 2 in figure, and 0-30 represents test point in figure；
Fig. 3 is the wall thickness change curve of high pressure resistant outer expanding helical bellows enhanced heat transfer component described in embodiment 1；
Fig. 4 is that high temperature fluid and pipe are outer low in the pipe of the high pressure resistant outer expanding helical bellows enhanced heat transfer component of embodiment 2
The flow schematic diagram of warm fluid；
Fig. 5 is close-up schematic view at the evagination ripple knot of the high pressure resistant outer expanding helical bellows enhanced heat transfer components of Fig. 4；
Fig. 6 is radial cross-section at the evagination ripple knot of the high pressure resistant outer expanding helical bellows enhanced heat transfer components of Fig. 4；
Fig. 7 is ripple knot spacing-heat transfer property incremental rate curve figure；
Fig. 8 is ripple knot spacing-resistance performance incremental rate curve figure；
Fig. 9 is ripple knot spacing-complex heat transfer factor curve figure；
Figure 10 is ripple knot height-heat transfer property incremental rate curve figure；
Figure 11 is ripple knot height-resistance performance incremental rate curve figure；
Figure 12 is ripple knot height-complex heat transfer factor curve figure.
Specific embodiment
Specific embodiment one：Present embodiment is a kind of system of high pressure resistant outer expanding helical bellows enhanced heat transfer component
Preparation Method is completed according to the following steps：
Using heavy wall light pipe, hydraulic forming is formed in a mold, and the hydraulic forming time is 45s, that is, obtain high pressure resistant outer expanding
Helical bellows enhanced heat transfer component；Mold clamping force increases step by step with the time during hydraulic forming, if the time is t, unit is
S, mold clamping force is F, and unit is kN, as 0≤t ＜ 10s, F=450t；As 10≤t ＜ 40s, F=500t/3+8500/3；When
During 40≤t≤45s, F=9500；Interior pressure increases step by step with the time during hydraulic forming, if the time is T, unit is s,
Mold clamping force is P, and unit is MPa, as 0≤T ＜ 10s, P=12T；As 10≤t ＜ 40s, P=6T+60；As 40≤t≤45s
When, P=300；
The high pressure resistant outer expanding helical bellows enhanced heat transfer component is outer expanding helical bellows, the outer expanding spiral shell
Rotation bellows is made up of straight length 1 and evagination ripple knot 2, and the evagination ripple knot 2 rotates progressive, institute around straight length 1 in the shape of a spiral
The ripple knot chamfering 3 of evagination ripple knot 2 is stated for 2.5mm, the ripple knot height 4 of the evagination ripple knot 2 is 0.5mm~2.5mm, the evagination
The ripple knot spacing 5 of ripple knot 2 is 10mm~30mm, and the ripple knot width 6 of the evagination ripple knot 2 is 8mm.
Present embodiment principle：The high pressure resistant outer expanding helical bellows enhanced heat transfer component, its helical corrugation wall
Make in pipe outer fluid produce with flow to vertical transverse direction it is de- be vortexed and with flow to identical longitudinal spiral stream, in two kinds of eddies
The development in boundary layer is destroyed under effect and heat and mass exchange near wall between fluid and core fluid is increased,
Realize that enhanced heat exchange is acted on.
Specific embodiment two：Present embodiment is with the difference of specific embodiment one：The wall of the heavy wall light pipe
Thickness is 2mm, and bore is 20mm.Other are identical with specific embodiment one.
Specific embodiment three：One of present embodiment and specific embodiment one or two difference is：The heavy wall light
The material of pipe is 304 stainless steels.Other are identical with specific embodiment one.
Specific embodiment four：A kind of application of high pressure resistant outer expanding helical bellows enhanced heat transfer component, it is high pressure resistant outer
Expanding helical bellows enhanced heat transfer component is applied in shell-and-tube heat exchanger or double pipe heat exchanger as heat transfer element.
Specific embodiment five：Present embodiment is with the difference of specific embodiment four：The high pressure resistant outer expanding
Helical bellows enhanced heat transfer component is applied to nuclear power gas-vapour combined cycle system as the heat transfer element of shell-and-tube heat exchanger
In.Other are identical with specific embodiment four.
Using following verification experimental verifications effect of the present invention
Embodiment 1：A kind of preparation method of high pressure resistant outer expanding helical bellows enhanced heat transfer component is according to the following steps
Complete：
Using heavy wall light pipe, hydraulic forming is formed in a mold, and the hydraulic forming time is 45s, that is, obtain high pressure resistant outer expanding
Helical bellows enhanced heat transfer component；Mold clamping force increases step by step with the time during hydraulic forming, if the time is t, unit is
S, mold clamping force is F, and unit is kN, as 0≤t ＜ 10s, F=450t；As 10≤t ＜ 40s, F=500t/3+8500/3；When
During 40≤t≤45s, F=9500；Interior pressure increases step by step with the time during hydraulic forming, if the time is T, unit is s,
Mold clamping force is P, and unit is MPa, as 0≤T ＜ 10s, P=12T；As 10≤t ＜ 40s, P=6T+60；As 40≤t≤45s
When, P=300；
The high pressure resistant outer expanding helical bellows enhanced heat transfer component is outer expanding helical bellows, the outer expanding spiral shell
Rotation bellows is made up of straight length 1 and evagination ripple knot 2, and the evagination ripple knot 2 rotates progressive, institute around straight length 1 in the shape of a spiral
The ripple knot chamfering 3 of evagination ripple knot 2 is stated for 2.5mm, the ripple knot height 4 of the evagination ripple knot 2 is 2mm, the ripple of the evagination ripple knot 2
Knot spacing 5 is 20mm, and the ripple knot width 6 of the evagination ripple knot 2 is 8mm.
The wall thickness of heavy wall light pipe described in embodiment 1 is 2mm, and bore is 20mm.
The material of heavy wall light pipe described in embodiment 1 is 304 stainless steels.
Accurate detection is carried out to heavy wall light pipe, it is known that the wall thickness of heavy wall light pipe is 2.016mm, external expanding helical bellows
Carry out accurate detection to understand, as shown in Figures 2 and 3, Fig. 2 is that high pressure resistant outer expanding helical bellows reinforcing is passed described in embodiment 1
The partial enlarged drawing of thermal element, the straight length 1 that not deformed area represents in figure, deformed area represents evagination ripple knot 2,0-30 in figure in figure
Represent test point；Fig. 3 is the wall thickness change curve of high pressure resistant outer expanding helical bellows enhanced heat transfer component described in embodiment 1；
As shown in Figure 3, the minimum wall thickness (MINI W.) of high pressure resistant outer expanding helical bellows enhanced heat transfer component described in embodiment 1 is 1.580mm,
Positioned at deformed area and the transitional region in not deformed area, maximum reduction is 21.63%.
Embodiment 2：A kind of application of high pressure resistant outer expanding helical bellows enhanced heat transfer component, high pressure resistant outer expanding spiral
Bellows enhanced heat transfer component is applied in nuclear power gas-vapour combined cycle system as the heat transfer element of shell-and-tube heat exchanger.
Described high pressure resistant outer expanding helical bellows enhanced heat transfer component is that embodiment 2 is prepared from.
Medium is for after work done of HTGR in the pipe of high pressure resistant outer expanding helical bellows enhanced heat transfer component
Helium exhaust steam, temperature is 571 DEG C, and pressure is 2.9MPa, and flow velocity is 10m/s；High pressure resistant outer expanding helical bellows augmentation of heat transfer
The outer medium of element tube is the saturated vapor of presurized water reactor steam turbine outlet high, 182.5 DEG C of temperature, pressure 1.06MPa, and flow velocity is
12.5m/s。
Fig. 4 is that high temperature fluid and pipe are outer low in the pipe of the high pressure resistant outer expanding helical bellows enhanced heat transfer component of embodiment 2
The flow schematic diagram of warm fluid；Fig. 5 is part at the evagination ripple knot of the high pressure resistant outer expanding helical bellows enhanced heat transfer components of Fig. 4
Enlarged diagram；Fig. 6 is radial cross-section at the evagination ripple knot of the high pressure resistant outer expanding helical bellows enhanced heat transfer components of Fig. 4；
By detecting 1.7 times that understand single tube heat exchange property up to light pipe, complex heat transfer performance is maximum up to 1.28.
Embodiment 3：The present embodiment is with the difference of embodiment 1：The ripple knot spacing 5 of the evagination ripple knot 2 is followed successively by
10mm, 15mm, 25mm and 30mm.Other are same as Example 1.
Under identical ripple knot height, ripple knot width and ripple knot chamfering, the different heat exchanging element functions of ripple knot spacing are detected
Influence, as shown in Figure 7 to 9, Fig. 7 is ripple knot spacing-heat transfer property incremental rate curve figure, and Fig. 8 is ripple knot spacing-resistance performance
Incremental rate curve figure, Fig. 9 is ripple knot spacing-complex heat transfer factor curve figure, from Fig. 7 and Fig. 8：With the increasing of ripple knot spacing
Plus, heat exchange property and resistance performance are all gradually reduced；As shown in Figure 9：With the increase of ripple knot spacing, complex heat transfer performance is presented
First increase the trend for reducing afterwards, and reached when ripple knot spacing is 20mm and be 1.267 to the maximum.
Embodiment 4：The present embodiment is with the difference of embodiment 1：The evagination ripple knot 2 ripple knot height 4 be 0.5mm,
1.0mm, 1.5mm and 2.5mm.Other are same as Example 1.
Under identical ripple knot spacing, ripple knot width and ripple knot chamfering, the different heat exchanging element functions of ripple knot height are detected
Influence, as shown in Figure 10 to Figure 12, Figure 10 is ripple knot height-heat transfer property incremental rate curve figure, and Figure 11 is ripple knot height-resistance
Performance incremental rate curve figure, Figure 12 is ripple knot height-complex heat transfer factor curve figure, from Figure 10 and Figure 11：As ripple knot is high
The increase of degree, heat exchange property and resistance performance all gradually increase；As shown in Figure 12：With the increase of ripple knot height, complex heat transfer
Performance is presented first increases the trend that reduces afterwards, and is reached when ripple knot is highly for 1.5mm and be 1.267 to the maximum.
Claims (5)
1. a kind of preparation method of high pressure resistant outer expanding helical bellows enhanced heat transfer component, it is characterised in that a kind of high pressure resistant outer
The preparation method of expanding helical bellows enhanced heat transfer component is completed according to the following steps：
Using heavy wall light pipe, hydraulic forming is formed in a mold, and the hydraulic forming time is 45s, that is, obtain high pressure resistant outer expanding spiral
Bellows enhanced heat transfer component；Mold clamping force increases step by step with the time during hydraulic forming, if the time is t, unit is s, closes
Mould power is F, and unit is kN, as 0≤t ＜ 10s, F=450t；As 10≤t ＜ 40s, F=500t/3+8500/3；When 40≤
During t≤45s, F=9500；Interior pressure increases step by step with the time during hydraulic forming, if the time is T, unit is s, matched moulds
Power is P, and unit is MPa, as 0≤T ＜ 10s, P=12T；As 10≤t ＜ 40s, P=6T+60；As 40≤t≤45s, P
=300；
The high pressure resistant outer expanding helical bellows enhanced heat transfer component is outer expanding helical bellows, the outer expanding helicon
Line pipe is made up of straight length (1) and evagination ripple knot (2), and the evagination ripple knot (2) rotates in the shape of a spiral around straight length (1) passs
Enter, ripple knot chamfering (3) of the evagination ripple knot (2) is 2.5mm, the ripple knot of the evagination ripple knot (2) height (4) for 0.5mm~
2.5mm, ripple knot spacing (5) of the evagination ripple knot (2) is 10mm~30mm, and ripple knot width (6) of the evagination ripple knot (2) is
8mm。
2. a kind of preparation method of high pressure resistant outer expanding helical bellows enhanced heat transfer component according to claim 1, it is special
Levy be the heavy wall light pipe material be 304 stainless steels.
3. a kind of preparation method of high pressure resistant outer expanding helical bellows enhanced heat transfer component according to claim 1, it is special
Levy be the heavy wall light pipe wall thickness for 2mm, bore is 20mm.
4. a kind of application of high pressure resistant outer expanding helical bellows enhanced heat transfer component, it is characterised in that high pressure resistant outer expanding spiral
Bellows enhanced heat transfer component is applied in shell-and-tube heat exchanger or double pipe heat exchanger as heat transfer element.
5. a kind of preparation method of high pressure resistant outer expanding helical bellows enhanced heat transfer component according to claim 1, it is special
Levy be the high pressure resistant outer expanding helical bellows enhanced heat transfer component as the heat transfer element of shell-and-tube heat exchanger, be applied to
In nuclear power gas-vapour combined cycle system.
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| CN201710108315.1A CN106903197B (en) | 2017-02-27 | 2017-02-27 | A kind of preparation method and application of high pressure resistant outer expanding helical bellows enhanced heat transfer component |
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|---|---|---|---|
| CN201710108315.1A CN106903197B (en) | 2017-02-27 | 2017-02-27 | A kind of preparation method and application of high pressure resistant outer expanding helical bellows enhanced heat transfer component |
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| CN106903197B CN106903197B (en) | 2018-07-03 |
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| CN107367184A (en) * | 2017-07-26 | 2017-11-21 | 哈尔滨工业大学 | Expanding spiral bellows tube inside and outside a kind of pipe |
| CN109737790A (en) * | 2018-12-29 | 2019-05-10 | 广东焕能科技有限公司 | One kind is assured |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106903197B (en) | 2018-07-03 |
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