EP0034601A1 - Chambre de combustion - Google Patents
Chambre de combustionInfo
- Publication number
- EP0034601A1 EP0034601A1 EP80901581A EP80901581A EP0034601A1 EP 0034601 A1 EP0034601 A1 EP 0034601A1 EP 80901581 A EP80901581 A EP 80901581A EP 80901581 A EP80901581 A EP 80901581A EP 0034601 A1 EP0034601 A1 EP 0034601A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- combustion chamber
- partition wall
- wall
- walls
- 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.)
- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 43
- 238000005192 partition Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 230000035882 stress Effects 0.000 claims description 14
- 230000008642 heat stress Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 3
- 238000001816 cooling Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- KKEBXNMGHUCPEZ-UHFFFAOYSA-N 4-phenyl-1-(2-sulfanylethyl)imidazolidin-2-one Chemical compound N1C(=O)N(CCS)CC1C1=CC=CC=C1 KKEBXNMGHUCPEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
Definitions
- the present invention relates to such combustion chambers as are disclosed in the preamble to the following claim 1.
- a combustion chamber of the kind in question is disclosed / e.g. in the U.S. patent 3 853 453.
- the partition wall will be in the shape of a cross.
- the ends of the cross are free in the side chambers, while the side edges of the cross are attached to the inside of the combustion chamber.
- the combustion chamber and the partition wall are usually cast in one piece, but it is also possible to manufacture the partition wall as a separate part and weld it in the combustion chamber.
- the combustion chamber is intended to dissipate heat to the surroundings for heating. In most cases, known combustion chambers of the kind in question are surrounded by water in a hot water installation, e.g. hot water for a dwelling house. If cracks occur in the wall of the combustion chamber, the result can be that water comes into the combustion chamber and causes operational disturbances and stoppages.
- the object of the present invention is to eliminate this risk.
- the invention is based on the knowledge that cracks in the combustion chamber wall must . be prevented, while it is possible to allow cracks of a certain width in the partition wall without this the function of the apparatus.
- the problem is solved in accordance with the invention such that in the manufacture of the partition wall, said wall is already provided with stress concentration locations or indications of fracture at predetermined places for providing desired cracks in the partition wall when said wall and the walls of the side chambers are subjected to heat stresses during the first runs as well as heatings during starting and coolings during stopping the apparatus.
- the partition wall thus cracks into two parts in each side chamber, so that these parts can move freely relative each other during heating and cooling. The cracks which occur will, however, be so narrow that they do not affect the course of combustion.
- Fig. 1 is a side view of the combustion chamber in accordance with the invention.
- Fig. 2 is a view from above.
- Fig. 3 is a section along the line 3-3 in Fig. 1
- Fig. 4 is a section along the line 4-4 in Fig. 2
- Fig. 5 is a section along the line 5-5 in Fig. 2.
- the whole combustion chamber is integrally cast steel, and consists of identically similar side chambers 10,12,14,16 which are uniformly distributed around the central axis of the combustion chamber.
- the side chamber 12 for example, has two opposing side walls 12a,12b and an arcuate outer wall 12c so that the side chambers will be substantially half- cylindrical.
- the side walls of the side chambers merge into each other and form corners 18 in the central space of the combustion chamber, to which the side chambers are connected.
- the outer walls of the side chambers run together in an upper end wall 20 and in a lower end wall 22.
- An inlet port 24 is made in the end wall 20 for accommodating an axial inlet pipe (not shown) .
- the end wall 22 is formed with an axial outlet 26, to which an exhaust pipe is to be connected.
- the central zone of the combustion chamber is /'i ⁇ K .
- the partition wall 28 is extended with side portions 28a at the side chambers, said portions extending as projections into the respective side chamber and are terminated with an end edge 28b situated at a predetermined distance from the outer wall of the respective side chamber, e.g. the outer wall 12c of the side chamber 12.
- an end edge 28b situated at a predetermined distance from the outer wall of the respective side chamber, e.g. the outer wall 12c of the side chamber 12.
- the part of the combustion chamber including the side walls, lying above the partition wall form a first chamber 32 in which the fuel-air mixture is ignited and combusted, where ⁇ after the combustion gases flow, with a certain amount of terminating combustion, down through the openings 30 to the subsequent second chamber 34 situated under the partition wall.
- the illustrated combustion chamber is usually intended to be kept immersed in a container with water which is to be heated. Since the partition wall 28,28a is cast in one piece with the rest of the combustion chamber, the edge portions of the partition wall will be rigidly attached to the walls of the combustion chamber and to the side walls of the side chambers. This signifies, inter alia, that considerable heat stresses can be obtained at the side edges 28c of the wall portions
- each wall portion has a stress concentration location at its middle in the form of grooves 36,38,40,42 on the upper side of the partition wall.
- the stress concentration locations illustrated in the example extend out to the respective end edge 28b and meet at the centre 44 of the partition wall.
- the stress concentration locations are formed as V-shaped grooves, the depth of which is substantially greater than the thickness of the partition wall at the stress concentration. In the example illustrated, the depth of the groove is about 85% of the thickness of the partition wall at the stress concentration.
- the side portions have a thickness increasing from the middle and out towards the side edges, where the wall portions connect via a softly rounded junction to the side walls of the side chamber.
- the stress concentrations can naturally have a plurality of other locations than those illustrated in conjunction with the described embodiment.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
Une chambre de combustion possede une pluralite de chambres laterales (10, 12, 14, 16) distribuees autour de la region centrale de la chambre. Une paroi de separation (28) divise la chambre en une premiere chambre et en une seconde chambre (32 et 34) et se prolonge par des portions de paroi (28a) se projetant partiellement dans les chambres laterales et rattachees a leurs parois laterales (12a, 12b), et laissant une ouverture de passage du flux (30) au bord extreme (28b) de la portion de paroi respective (28a). La paroi de separation (28) est pourvue d'une pluralite de points de concentration de contraintes (36, 38, 40, 42) sur lesquels la cloison (28) se rompt en fissures etroites pendant les quelques premiers demarrages et chauffages jusqu'a atteindre la temperature de fonctionnement normal et les refroidissements se produisant a l'arret, de maniere a ce que la cloison (28) soit exempte de contraintes lors des fonctionnements ulterieurs de l'appareil.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7906798 | 1979-08-14 | ||
SE7906798A SE418221B (sv) | 1979-08-14 | 1979-08-14 | Brennkammare |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0034601A1 true EP0034601A1 (fr) | 1981-09-02 |
Family
ID=20338624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80901581A Withdrawn EP0034601A1 (fr) | 1979-08-14 | 1981-03-09 | Chambre de combustion |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0034601A1 (fr) |
BE (1) | BE884793A (fr) |
FI (1) | FI802548A (fr) |
IT (1) | IT1132415B (fr) |
SE (1) | SE418221B (fr) |
WO (1) | WO1981000610A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5243367A (en) * | 1990-07-24 | 1993-09-07 | Fritz Spellitz | Optical system for measuring the human cornea |
KR100885337B1 (ko) * | 2001-07-26 | 2009-02-26 | 사이러스 로직, 인코포레이티드 | 스위치 모드 회로에서 출력 임피던스 정합을 위한 회로 및방법 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE422990B (sv) * | 1980-08-12 | 1982-04-05 | Mareck Bv | Brenslekammare for pulserande forbrenning |
FR2584169B1 (fr) * | 1985-06-27 | 1989-11-24 | Elf En | Ensemble embouti pour la combustion pulsatoire |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE361522B (fr) * | 1972-04-04 | 1973-11-05 | K B Olsson | |
US3879167A (en) * | 1974-04-18 | 1975-04-22 | Jones & Laughlin Steel Corp | Non-warping heat shield |
-
1979
- 1979-08-14 SE SE7906798A patent/SE418221B/sv not_active IP Right Cessation
-
1980
- 1980-08-13 WO PCT/SE1980/000206 patent/WO1981000610A1/fr unknown
- 1980-08-13 FI FI802548A patent/FI802548A/fi not_active Application Discontinuation
- 1980-08-14 IT IT24187/80A patent/IT1132415B/it active
- 1980-08-14 BE BE0/201764A patent/BE884793A/fr not_active IP Right Cessation
-
1981
- 1981-03-09 EP EP80901581A patent/EP0034601A1/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO8100610A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5243367A (en) * | 1990-07-24 | 1993-09-07 | Fritz Spellitz | Optical system for measuring the human cornea |
KR100885337B1 (ko) * | 2001-07-26 | 2009-02-26 | 사이러스 로직, 인코포레이티드 | 스위치 모드 회로에서 출력 임피던스 정합을 위한 회로 및방법 |
Also Published As
Publication number | Publication date |
---|---|
WO1981000610A1 (fr) | 1981-03-05 |
IT8024187A0 (it) | 1980-08-14 |
SE418221B (sv) | 1981-05-11 |
FI802548A (fi) | 1981-02-15 |
BE884793A (fr) | 1980-12-01 |
IT1132415B (it) | 1986-07-02 |
SE7906798L (sv) | 1981-02-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT CH DE FR GB NL |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19810903 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: OLSSON, KARL BOERJE |