JPS593214Y2 - combustor - Google Patents
combustorInfo
- Publication number
- JPS593214Y2 JPS593214Y2 JP1976100751U JP10075176U JPS593214Y2 JP S593214 Y2 JPS593214 Y2 JP S593214Y2 JP 1976100751 U JP1976100751 U JP 1976100751U JP 10075176 U JP10075176 U JP 10075176U JP S593214 Y2 JPS593214 Y2 JP S593214Y2
- Authority
- JP
- Japan
- Prior art keywords
- combustion plate
- combustion
- flame
- center
- plate
- 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
Landscapes
- Gas Burners (AREA)
Description
【考案の詳細な説明】
この考案は気体燃料と燃焼用空気との混合気を燃焼させ
る燃焼器、いわゆる予混合燃焼器に関するものである。[Detailed Description of the Invention] This invention relates to a combustor that burns a mixture of gaseous fuel and combustion air, a so-called premix combustor.
一般に、この種の燃焼器に使用する燃焼板は第2図に示
すように炎の均−化及び燃焼の安定化を計るため独立し
た炎口8aを多数持っているケースが多い。Generally, the combustion plate used in this type of combustor often has a large number of independent flame ports 8a in order to equalize the flame and stabilize combustion, as shown in FIG.
しかるに燃焼板8上の炎は、気体燃料と燃焼用空気の完
全な混合や各炎口8aでの混合ガススピードの完全な均
一化は不可能なため、完全に均一な炎はできず、燃焼板
8の炎から受ける熱(主に輻射熱)は燃焼板の各面で不
均一になり、がつ燃焼板8の放熱は周囲で多く、中心部
で少ないということにより、燃焼板には温度むらからく
る熱応力が発生し、使用中に変形や割れの発生する原因
となっている。However, the flame on the combustion plate 8 cannot be a completely uniform flame because it is impossible to completely mix the gaseous fuel and the combustion air and to equalize the mixed gas speed at each flame port 8a. The heat received from the flame of the plate 8 (mainly radiant heat) is non-uniform on each side of the combustion plate, and the heat radiated from the combustion plate 8 is large at the periphery and low at the center, so the combustion plate has temperature unevenness. This generates thermal stress, which causes deformation and cracking during use.
本考案はかかる熱応力による割れや変形の発生しにくい
燃焼板を提供するものである。The present invention provides a combustion plate that is less likely to crack or deform due to such thermal stress.
以下、この考案の一実施例を図について説明する。An embodiment of this invention will be described below with reference to the drawings.
第1図は予混合燃焼器を示し、1は気体燃料の入口、2
は燃焼用空気の入口、5は底壁3及び側壁4で囲まれた
混合室で、ここで気体燃料と燃焼用空気の混合を行う。Figure 1 shows a premix combustor, where 1 is the gaseous fuel inlet, 2
5 is a combustion air inlet, and 5 is a mixing chamber surrounded by a bottom wall 3 and side walls 4, in which gaseous fuel and combustion air are mixed.
6は混合室5の上部を閉鎖するように設けられた整流板
で、均一に小孔6aを有し、混合ガスの吹出し速度の均
一化を計っている。Reference numeral 6 denotes a rectifier plate provided to close the upper part of the mixing chamber 5, which has small holes 6a uniformly in order to equalize the blowing speed of the mixed gas.
7は整流板6と燃焼板8の間にはさまれた金網で、混合
ガスの吹出し速度の均一化と炎の混合室5への逆火を防
止している。Reference numeral 7 denotes a wire mesh sandwiched between the rectifying plate 6 and the combustion plate 8, which equalizes the blowing speed of the mixed gas and prevents the flame from backfiring into the mixing chamber 5.
8aは燃焼板に設けた各々独立した多数の炎口で、その
上部の燃焼室9内に炎10を形成する。Reference numeral 8a designates a large number of independent flame ports provided on the combustion plate, which form a flame 10 in the combustion chamber 9 above.
第3図は本考案の燃焼板の一実施例を示し、11は燃焼
板8の中央部より外周縁の少し手前の所まで放射状に延
び、かつ中央部で互いに連通したスリットである。FIG. 3 shows an embodiment of the combustion plate of the present invention, in which slits 11 extend radially from the center of the combustion plate 8 to a position slightly before the outer peripheral edge, and communicate with each other at the center.
次に作用について説明する。Next, the effect will be explained.
燃焼中の燃焼板8の温度について考える。Consider the temperature of the combustion plate 8 during combustion.
受熱は炎10より受ける熱(主に輻射熱)で、混合ガス
の濃度や炎口8a通過時のスピードの不均一により発生
する炎の温度や大きさの差により各部で異なる。The heat received is heat (mainly radiant heat) received from the flame 10, which differs in each part due to the difference in temperature and size of the flame generated due to the concentration of the mixed gas and the non-uniform speed when passing through the flame port 8a.
次に放熱は、混合ガスが燃焼板8にぶつかり、炎口8a
を通過する時に混合ガスに奪われるもの、及び側壁4へ
奪われるものである。Next, the heat radiation occurs when the mixed gas hits the combustion plate 8 and the flame opening 8a
, which is taken away by the mixed gas when passing through, and what is taken away by the side wall 4.
従って、燃焼板8上の温度分布は第5図に示すように中
央部はど高く、周辺部はど低くなり、中央部と周辺部と
では熱膨張に差を生じ、熱応力が発生し、使用中の変形
や割れが発生することとなる。Therefore, as shown in FIG. 5, the temperature distribution on the combustion plate 8 is higher at the center and lower at the periphery, causing a difference in thermal expansion between the center and the periphery, causing thermal stress. Deformation and cracking may occur during use.
しかして、この考案では燃焼板8に放射状スリット11
を入れ、燃焼板8の単位面積当りのスリット開口面積を
周辺部より中央部に至るに従って大にしているので、こ
のスリット11部で熱膨張の差、即ち熱応力を吸収でき
、変形や割れの発生しにくいものとなる。However, in this invention, the combustion plate 8 has radial slits 11.
Since the slit opening area per unit area of the combustion plate 8 is increased from the periphery to the center, the slit 11 can absorb the difference in thermal expansion, that is, thermal stress, and prevent deformation and cracking. This makes it less likely to occur.
第4図は他の実施例を示し、本図に示す如く各炎口8a
を放射状にスリット11で結んだものでも同様の効果が
ある。FIG. 4 shows another embodiment, in which each burner port 8a is shown in the figure.
A similar effect can be obtained by radially connecting them with slits 11.
又この考案では円形の燃焼板8のみの実施例で説明しで
あるが角形の燃焼板についても同様で゛ある。Further, although this invention has been described using only a circular combustion plate 8, the same applies to a rectangular combustion plate.
以上のようにこの考案では燃焼板にその中央部から周辺
部へ向って延び、かつ中央部で互いに連通ずる放射状の
スリットを設けたことを特徴とするものである。As described above, this invention is characterized in that the combustion plate is provided with radial slits extending from the center toward the periphery and communicating with each other at the center.
ところで、燃焼板の温度分布は、中央部で最大となって
周辺部に至たるに従い低くなり、これに伴って中央部で
最大の熱膨張が発生し、周辺部に至たるに従いその膨張
量が小さくなる特性があるが、この考案では、上述した
ようにスリットを設けているので、燃焼板の単位面積当
りのスノット開口面積は周辺部より中央部に至たるに従
い大きくなり、熱膨張量の大きい中央部でもスリットに
よりその熱膨張量を充分に吸収でき、燃焼板の熱応力に
よる変形や割れの発生を抑制することができる。By the way, the temperature distribution of the combustion plate is maximum at the center and decreases toward the periphery.As a result, the maximum thermal expansion occurs at the center, and the amount of expansion decreases toward the periphery. However, in this design, the slits are provided as mentioned above, so the snot opening area per unit area of the combustion plate increases from the periphery to the center, which causes a large amount of thermal expansion. Even in the central portion, the amount of thermal expansion can be sufficiently absorbed by the slit, and the occurrence of deformation and cracking due to thermal stress in the combustion plate can be suppressed.
第1図は予混合燃焼器を示す断面図、第2図は従来の燃
焼板を示す平面図、第3図はこの考案の一実施例を示す
燃焼板の平面図、第4図はこの考案の他の実施例を示す
燃焼板の平面図、第5図は燃焼板の各部における温度分
布図である。
図中、1は気体燃料人口、2は燃焼用空気入口、5は混
合室、8は燃焼板、11はスリットである。
なお、図中同一符号は同一または相当部分を示す。Fig. 1 is a sectional view showing a premix combustor, Fig. 2 is a plan view showing a conventional combustion plate, Fig. 3 is a plan view of a combustion plate showing an embodiment of this invention, and Fig. 4 is a plan view showing this invention. FIG. 5 is a plan view of a combustion plate showing another embodiment, and FIG. 5 is a temperature distribution diagram at each part of the combustion plate. In the figure, 1 is a gas fuel population, 2 is a combustion air inlet, 5 is a mixing chamber, 8 is a combustion plate, and 11 is a slit. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
気との混合気を上記燃焼板上で燃焼させるものにおいて
、上記燃焼板にはその中央部から周辺部へ向って延び、
かつ中央部で互いに連通ずる放射状のスリットを設けた
ことを特徴とする燃焼器。The combustion plate includes a combustion plate having a large number of flame ports, and burns a mixture of gaseous fuel and combustion air on the combustion plate, and the combustion plate includes a combustion plate extending from a central portion to a peripheral portion of the combustion plate;
A combustor characterized by having radial slits that communicate with each other in the center.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1976100751U JPS593214Y2 (en) | 1976-07-27 | 1976-07-27 | combustor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1976100751U JPS593214Y2 (en) | 1976-07-27 | 1976-07-27 | combustor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5317949U JPS5317949U (en) | 1978-02-15 |
JPS593214Y2 true JPS593214Y2 (en) | 1984-01-28 |
Family
ID=28710992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1976100751U Expired JPS593214Y2 (en) | 1976-07-27 | 1976-07-27 | combustor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS593214Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03247909A (en) * | 1991-01-11 | 1991-11-06 | Osaka Gas Co Ltd | Burner |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50100357U (en) * | 1974-01-17 | 1975-08-20 |
-
1976
- 1976-07-27 JP JP1976100751U patent/JPS593214Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5317949U (en) | 1978-02-15 |
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