EP0222100B1 - Tube à ailettes à fond de rainure muni d'encoches et son procédé de fabrication - Google Patents
Tube à ailettes à fond de rainure muni d'encoches et son procédé de fabrication Download PDFInfo
- Publication number
- EP0222100B1 EP0222100B1 EP86112550A EP86112550A EP0222100B1 EP 0222100 B1 EP0222100 B1 EP 0222100B1 EP 86112550 A EP86112550 A EP 86112550A EP 86112550 A EP86112550 A EP 86112550A EP 0222100 B1 EP0222100 B1 EP 0222100B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- indentations
- finned tube
- fins
- tube
- finned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
- F28F13/185—Heat-exchange surfaces provided with microstructures or with porous coatings
- F28F13/187—Heat-exchange surfaces provided with microstructures or with porous coatings especially adapted for evaporator surfaces or condenser surfaces, e.g. with nucleation sites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
- B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
-
- 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
-
- 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
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
- F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
Definitions
- the invention relates to a finned tube of the type described in the preamble of the main claim.
- Such a finned tube is known from EP-A 0 102 407. On the inside of the tube, it has an interrupted internal ripple below the outer grooves; On the inside of the tube there are separate projections made of displaced tube wall material. This results in favorable heat transfer properties on the inside of the pipe.
- the inner projections on the outside of the tube correspond to depressions in the tube wall which are separate from one another and which extend in the direction of the helical lines of the outer grooves over a length of the order of a turn.
- the invention is therefore based on the object to design the tube wall in the region of the groove base in a simple manner so that the heat transfer is improved.
- the object is achieved in that the length L of the indentations measured in the direction of the center lines of the channel-shaped indentations is smaller than the rib pitch (t R ) and that 0.5 to 20 indentations are arranged per cm of groove length.
- the fine indentations can easily be made during the rolling process for the finned tube.
- the width B of the indentations measured perpendicular to the direction of the center lines is preferably less than or equal to their length L.
- the center lines of the indentations form an angle a with the helical direction of the grooves, 0 ° ⁇ a ⁇ 180 ° ; in particular for a: 10 ° ⁇ a ⁇ 170 ° .
- the depth of the indentations is preferably 0.01 to 1.0 mm, in particular 0.05 to 0.5 mm.
- the indentations are approximately V-shaped, trapezoidal or semicircular or the like. It is advisable to combine different cross-sectional shapes with one another.
- the heat transfer properties on the outside of the tube are improved if the ribs of the tube according to the invention circulate with a T-shape.
- the inside of the tube is usually essentially smooth, an improvement in heat transfer is achieved by an internal corrugation if there are continuous projections in the helical direction of the outer grooves.
- the finned tubes according to the invention are preferably used in flooded evaporators.
- the invention further relates to a method for producing the finned tube according to the invention.
- the method is characterized by the features a) and b) according to claim 17.
- the wording " and / or " in claim 17 relates to whether or not the tube is to rotate simultaneously during the axial feed movement.
- the smooth tube is preferably supported by a rolling mandrel located therein.
- a method with the features according to claim 19 is recommended for producing a finned tube with T-shaped fins.
- the generation of an internal ripple of the finned tube is preferably carried out according to claim 20.
- FIG. 1 and 2 show a finned tube 1 in partial section and in cross section.
- T-shaped ribs 2 run helically, between which a groove 3, which also extends helically, is formed.
- the foot 4 of the ribs 2 protrudes radially from the tube wall 5, while the rib ends 6 are each compressed into a T-shape in such a way that narrowed gaps 7 are formed (cf. the upper gap width S in FIG. 1).
- the distance between the ribs 2 changes continuously, so that the grooves 3 are essentially formed as rounded cavities.
- the rib division as the distance from the center of the rib to the center of the rib is denoted by t R.
- the tube wall 5 has fine indentations 8 in the area of the groove base 3 ', which run essentially in the axial direction of the tube 1 and have a regular spacing in the circumferential direction of the tube.
- the depth of the indentations 8 is designated T (cf. in particular FIG. 2).
- Fig. 4 shows on an enlarged scale indentations 8 in the groove base 3 'with V, trapezoidal and semicircular cross-section.
- the deepest points of the channel-shaped indentations 8 are each connected by the center lines 8 'shown.
- the V-shaped indentations 8 are referred to below as “notches”.
- the length of the indentations 8 measured in the direction of the center lines 8 ′ is denoted by L, the width measured perpendicularly thereto by B.
- L and B are significantly smaller than t R.
- Fig. 6 is shown schematically on an enlarged scale how an indentation 8 extends in each case into the foot 4 of adjacent ribs 2, so that pronounced corners 4 'are formed in the rib flanks.
- the core wall thickness W and the depth T of the indentations 8 are also entered.
- W R remaining wall thickness
- T f residual wall thickness
- the device according to FIG. 8 for producing a T-finned tube 1 can be used with a stationary roller head (with a rotating tube) or with a rotatable roller head (with only an axially advancing tube).
- a rolling tool 9 a toothed notched disk 10, a spacer disk 11, a cylindrical smoothing roller 12, a split roller 13 for the ribs and a cylindrical upsetting roller 14 are in each case integrated a tool holder indicated by number 15 (except for the notched disk 10, the device corresponds to that according to DE-A 2,758,526).
- four or more tool holders 15 can also be used.
- the tool holder 15 are radially adjustable. They are in turn arranged in a stationary roller head (not shown).
- the smooth pipe 1 'entering in the direction of the arrow is set in rotation by the driven rolling tools 9 arranged on the circumference of the pipe, the axis of which extends obliquely to the pipe axis.
- the rolling tools 9 consist, in a manner known per se, of rolling disks 16 arranged side by side, the diameter of which increases in the direction of the arrow.
- the centrally arranged rolling tools 9 form the ribs 2 'in a known manner from the tube wall 5 supported by a rolling mandrel 17. A reduction in diameter initially takes place in a front region (feed region). In a middle area (finish rolling area) the helical ribs 2 'are rolled out. In a tool holder 15, the rolling tool 9 is followed by a toothed notched disk 10, the outer diameter D of which is larger than the outer diameter of the last rolling disk 16 '.
- the notched disk 10 has axially parallel teeth 18 (cf. FIG. 9), so that fine notches 8 are formed in the tube wall 5 in the region of the groove base 3 '.
- FIG. 9 shows a cross section through a notched disk 10 with teeth 18.
- the outer diameter is denoted by D, the height of the teeth 18 by hz.
- D the outer diameter
- hz the height of the teeth 18
- the notched disk 10 it is advisable for the notched disk 10 to have about 0.5 to 20 axially parallel or obliquely running - in cross section - approximately triangular, trapezoidal or semicircular teeth 18 per cm circumference, the tooth height hz being approximately 0.01 to 10.0 mm is.
- the T-shaped ribs 2 are formed in a manner known per se.
- a spacer disk 11 follows the notched disk 10.
- the smoothing roller 12 smoothes the ends of the ribs 2 'so that the ends of the ribs 2 "lie on an imaginary cylindrical surface which is coaxial with the tube center axis 19.
- the subsequent splitting roller 13 splits the Ribs 2 "in the helical direction and at the same time bends them sideways, so that Y-ribs 2 '" result, which are compressed by a compression roller 14 in the radial direction to form T-shaped ribs 2.
- the thickness of the smoothing roller 12, split roller 13 and compression roller 14 corresponds approximately to the rib pitch t R (between the smoothing roller 12 and the split roller 13, a correction disc 20 is also indicated).
- a device according to Fig. 10 used, in which the rolling mandrel 17 ends with the last rolling disc 16 '.
- a pressing roller 22 follows in the tool holder 15 on the rolling tool 9, the outside diameter of which is larger than the outside diameter of the last rolling disk 16 '.
- the groove 3 is deepened between the ribs 2 by the pressure roller 22, so that projections 21 are formed on the inside of the tube by displaced tube wall material (internal ripple H).
- the notch disk 10 which follows the pressure roller 22, in turn causes the groove base 3 'to be notched.
- the pressure roller 22 and the notched disk 10 have a smaller thickness than the last roller disk 16 '.
- SF-Cu oxygen-free Cu
- the diameter of the rolling disks used increased from 16 to 36.5 mm.
- Both tubes were measured as a single tube in the flooded evaporator mode (i.e. water in the tube, refrigerant outside).
- a notched disk 10 with 50 teeth 18 was used to produce the notches 8 in the finned tube 1 according to the example, which corresponds to approximately 4 notches per cm of groove length.
- finned tubes 1 were produced with a device according to FIG. 10, only notched disks 10 with different numbers of teeth 18 being used (all other tube sizes remained unchanged).
- the finned tubes 1 produced in this way with different numbers of notches 8 per cm of groove length were measured under the same conditions as in the exemplary embodiment in flooded evaporator operation (water in the tube, refrigerant R 22 outside).
- this point is marked with P both in FIG. 11 and in FIG. 12.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP85113859 | 1985-10-31 | ||
EP85113859 | 1985-10-31 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0222100A2 EP0222100A2 (fr) | 1987-05-20 |
EP0222100A3 EP0222100A3 (en) | 1987-10-07 |
EP0222100B1 true EP0222100B1 (fr) | 1989-08-09 |
Family
ID=8193857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86112550A Expired EP0222100B1 (fr) | 1985-10-31 | 1986-09-10 | Tube à ailettes à fond de rainure muni d'encoches et son procédé de fabrication |
Country Status (3)
Country | Link |
---|---|
US (1) | US4796693A (fr) |
EP (1) | EP0222100B1 (fr) |
DE (1) | DE3664959D1 (fr) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2101136A2 (fr) | 2008-03-12 | 2009-09-16 | Wieland-Werke Ag | Tube d'évaporateur doté d'encoches optimisées à la base des rainures |
DE102014002829A1 (de) | 2014-02-27 | 2015-08-27 | Wieland-Werke Ag | Metallisches Wärmeaustauscherrohr |
WO2017207089A1 (fr) | 2016-06-01 | 2017-12-07 | Wieland-Werke Ag | Tube d'échangeur de chaleur |
DE102018004701A1 (de) | 2018-06-12 | 2019-12-12 | Wieland-Werke Ag | Metallisches Wärmeaustauscherrohr |
DE202020005625U1 (de) | 2020-10-31 | 2021-11-10 | Wieland-Werke Aktiengesellschaft | Metallisches Wärmeaustauscherrohr |
DE202020005628U1 (de) | 2020-10-31 | 2021-11-11 | Wieland-Werke Aktiengesellschaft | Metallisches Wärmeaustauscherrohr |
WO2022089773A1 (fr) | 2020-10-31 | 2022-05-05 | Wieland-Werke Ag | Tube métallique d'échangeur de chaleur |
WO2022089772A1 (fr) | 2020-10-31 | 2022-05-05 | Wieland-Werke Ag | Tube métallique d'échangeur de chaleur |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5351397A (en) * | 1988-12-12 | 1994-10-04 | Olin Corporation | Method of forming a nucleate boiling surface by a roll forming |
JP2788793B2 (ja) * | 1991-01-14 | 1998-08-20 | 古河電気工業株式会社 | 伝熱管 |
DE4404357C2 (de) * | 1994-02-11 | 1998-05-20 | Wieland Werke Ag | Wärmeaustauschrohr zum Kondensieren von Dampf |
US5669993A (en) * | 1995-06-29 | 1997-09-23 | The Goodyear Tire & Rubber Company | Tire tread elements with built-in twist |
US6119770A (en) * | 1996-12-09 | 2000-09-19 | Uop Llc | Trapped particle heat transfer tube |
DE19963353B4 (de) * | 1999-12-28 | 2004-05-27 | Wieland-Werke Ag | Beidseitig strukturiertes Wärmeaustauscherrohr und Verfahren zu dessen Herstellung |
DE10101589C1 (de) | 2001-01-16 | 2002-08-08 | Wieland Werke Ag | Wärmeaustauscherrohr und Verfahren zu dessen Herstellung |
CN100498187C (zh) * | 2007-01-15 | 2009-06-10 | 高克联管件(上海)有限公司 | 一种蒸发冷凝兼备型传热管 |
CN101338987B (zh) * | 2007-07-06 | 2011-05-04 | 高克联管件(上海)有限公司 | 一种冷凝用传热管 |
US9844807B2 (en) * | 2008-04-16 | 2017-12-19 | Wieland-Werke Ag | Tube with fins having wings |
US9038710B2 (en) * | 2008-04-18 | 2015-05-26 | Wieland-Werke Ag | Finned tube for evaporation and condensation |
EP2788705B1 (fr) * | 2011-12-08 | 2017-03-01 | Carrier Corporation | Procédé de formation de tubes d'échangeur de chaleur |
CN106482568B (zh) * | 2015-08-25 | 2019-03-12 | 丹佛斯微通道换热器(嘉兴)有限公司 | 用于换热器的换热管、换热器及其装配方法 |
KR101797176B1 (ko) * | 2016-03-21 | 2017-11-13 | 주식회사 평산 | 대체냉매적용 공조시스템의 내부 열교환기 이중관 구조 |
US9945618B1 (en) * | 2017-01-04 | 2018-04-17 | Wieland Copper Products, Llc | Heat transfer surface |
US20220146214A1 (en) * | 2020-11-09 | 2022-05-12 | Carrier Corporation | Heat Transfer Tube |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3299949A (en) * | 1960-04-29 | 1967-01-24 | Thomson Houston Comp Francaise | Device for evaporative cooling of bodies, and particularly power vacuum tubes |
FR1502797A (fr) * | 1966-09-15 | 1967-11-24 | Thomson Houston Comp Francaise | Perfectionnements aux dispositifs d'échange de chaleur entre une paroi et un liquide |
US3791003A (en) * | 1970-02-24 | 1974-02-12 | Peerless Of America | Method of frabricating a plural finned heat exchanger |
US3598180A (en) * | 1970-07-06 | 1971-08-10 | Robert David Moore Jr | Heat transfer surface structure |
IL40244A (en) * | 1971-09-07 | 1975-10-15 | Universal Oil Prod Co | Tubing or plates for heat transfer processes |
US3893322A (en) * | 1974-08-21 | 1975-07-08 | Universal Oil Prod Co | Method for providing improved nucleate boiling surfaces |
US4313248A (en) * | 1977-02-25 | 1982-02-02 | Fukurawa Metals Co., Ltd. | Method of producing heat transfer tube for use in boiling type heat exchangers |
US4159739A (en) * | 1977-07-13 | 1979-07-03 | Carrier Corporation | Heat transfer surface and method of manufacture |
US4179911A (en) * | 1977-08-09 | 1979-12-25 | Wieland-Werke Aktiengesellschaft | Y and T-finned tubes and methods and apparatus for their making |
DE2803273A1 (de) * | 1978-01-26 | 1979-08-02 | Wieland Werke Ag | Rippenrohr sowie verfahren und vorrichtung zu dessen herstellung |
FR2493735A1 (fr) * | 1980-11-07 | 1982-05-14 | Maury Marc | Faconnage de tubes a turbulences pour echangeurs thermiques |
EP0102407B1 (fr) * | 1982-09-03 | 1986-02-19 | Wieland-Werke Ag | Tube à ailettes avec protubérances internes et procédé et dispositif de fabrication |
US4577381A (en) * | 1983-04-01 | 1986-03-25 | Kabushiki Kaisha Kobe Seiko Sho | Boiling heat transfer pipes |
DE3408626A1 (de) * | 1984-03-09 | 1985-09-12 | Wieland-Werke Ag, 7900 Ulm | Gewickelter waermeuebertrager, insbesondere fuer waermepumpen oder kaelteanlagen |
JPH06100432B2 (ja) * | 1984-06-20 | 1994-12-12 | 株式会社日立製作所 | 伝熱管 |
JPS6189497A (ja) * | 1984-10-05 | 1986-05-07 | Hitachi Ltd | 伝熱管 |
-
1986
- 1986-09-10 EP EP86112550A patent/EP0222100B1/fr not_active Expired
- 1986-09-10 DE DE8686112550T patent/DE3664959D1/de not_active Expired
- 1986-10-21 US US06/921,194 patent/US4796693A/en not_active Expired - Lifetime
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8281850B2 (en) | 2008-03-12 | 2012-10-09 | Wieland-Werke Ag | Evaporator tube with optimized undercuts on the groove base |
EP2101136A2 (fr) | 2008-03-12 | 2009-09-16 | Wieland-Werke Ag | Tube d'évaporateur doté d'encoches optimisées à la base des rainures |
US11073343B2 (en) | 2014-02-27 | 2021-07-27 | Wieland-Werke Ag | Metal heat exchanger tube |
DE102014002829A1 (de) | 2014-02-27 | 2015-08-27 | Wieland-Werke Ag | Metallisches Wärmeaustauscherrohr |
WO2017207089A1 (fr) | 2016-06-01 | 2017-12-07 | Wieland-Werke Ag | Tube d'échangeur de chaleur |
DE102016006914A1 (de) | 2016-06-01 | 2017-12-07 | Wieland-Werke Ag | Wärmeübertragerrohr |
DE102016006914B4 (de) | 2016-06-01 | 2019-01-24 | Wieland-Werke Ag | Wärmeübertragerrohr |
US10996005B2 (en) | 2016-06-01 | 2021-05-04 | Wieland-Werke Ag | Heat exchanger tube |
DE102018004701A1 (de) | 2018-06-12 | 2019-12-12 | Wieland-Werke Ag | Metallisches Wärmeaustauscherrohr |
DE202020005625U1 (de) | 2020-10-31 | 2021-11-10 | Wieland-Werke Aktiengesellschaft | Metallisches Wärmeaustauscherrohr |
DE202020005628U1 (de) | 2020-10-31 | 2021-11-11 | Wieland-Werke Aktiengesellschaft | Metallisches Wärmeaustauscherrohr |
WO2022089773A1 (fr) | 2020-10-31 | 2022-05-05 | Wieland-Werke Ag | Tube métallique d'échangeur de chaleur |
WO2022089772A1 (fr) | 2020-10-31 | 2022-05-05 | Wieland-Werke Ag | Tube métallique d'échangeur de chaleur |
Also Published As
Publication number | Publication date |
---|---|
EP0222100A2 (fr) | 1987-05-20 |
EP0222100A3 (en) | 1987-10-07 |
DE3664959D1 (en) | 1989-09-14 |
US4796693A (en) | 1989-01-10 |
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