JPS5928165Y2 - combustion device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a closed combustion device in which a combustor is provided within a combustion cylinder.

A conventional combustion device of this type is shown in FIGS. 1 and 2.

In the figure, 1 is a combustion tube, 2 is a blower guide connected to the combustion tube 1, and a blower (not shown) is fixed inside the blower guide.

3 is a fuel injection nozzle fixed to the combustion tube 1; 4 is a combustor supported in the combustion tube 1 and formed in a substantially elliptical shape; Air guide plate 8
It is composed of etc.

More specifically, the combustor main body 5 includes a primary air supply port 9 that opens facing the nozzle 3, and a mixing chamber formed in a substantially elliptical ring shape into which fuel and primary air are introduced through the supply port 9. 10 are formed.

The burner plate 6 and the burner plate 7 are fitted into the combustor main body 5 one after another, and the burner plate 7 and the secondary air guide plate 8 are aligned collinearly with the combustor main body 5 with a screw 11 at the center thereof. has been done.

Then, the burner plate 6 is pressed against the burner port forming portion of the burner port plate 7, and the burner plate 6 is clamped and fixed.

Incidentally, the burner plate 6 also serves as a constituent wall of the mixing chamber 10.

Reference numeral 12 denotes a burner port composed of a burner plate 6 and a burner port plate 7, and is formed around the entire circumference of the flamer plate 7.

13. 13 is an inner secondary air passage formed in the combustor main body 5; 14 is an outer secondary air passage formed between the outer wall of the combustor main body 5 and the inner wall of the combustion tube 1; 15 is a flame.

The operation of such a combustion device is as follows.

Combustion air is supplied around the combustor 4 from inside the blower guide 2 through the inner and outer secondary air passages 12 and 14 by driving a blower (not shown).

When fuel is injected from the fuel injection nozzle 3 toward the primary air supply port 9 in this state, a part of the combustion air is sucked into the primary air supply port 9 by this injection action and is transferred to the mixing chamber 10 along with the fuel as primary air. The mixture is introduced into the air and becomes a mixture.

The mixture is ejected from the flame port 12 around the flame port plate 7 and is sent to the ignition device (Fig. (not shown) and burns to form a flame 15.

However, in conventional combustion devices, the fitting contact portion between the combustor main body 5 and the burner plate 6 or the combustor main body 5 and the burner port plate 7 may be affected due to processing accuracy or variations in the combustor main body 5, burner plate 6, and burner port plate 7. A gap is inevitably formed at the fitting contact portion between the two, and the air-fuel mixture in the mixing chamber 10 leaks through the gap, causing incomplete combustion.

The present invention has been developed in view of the above-mentioned drawbacks, and by providing a disc spring between the combustor main body and the burner plate when fitting and fixing the burner plate and flame port plate to the combustor main body, the present invention eliminates the conventional drawbacks. The purpose of the present invention is to provide a combustion device that eliminates the above problems.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 3 and 4.

It should be noted that the same elements as in FIGS. 1 and 2 are given the same reference numerals and their explanations will be omitted.

In FIG. 3 and FIG. 4, 20 is the combustor of this embodiment;
21 is the combustor main body, and the secondary air supply port 9, the mixing chamber 10, and part of the inner secondary air passage 13 are formed in the same way as before, but the shape of the fitting contact with the burner plate 6 is different. The stepped portion 21a for fitting and holding the burner plate 6 is formed slightly deeper than the thickness of the burner plate 6.
Following this, another stepped portion 21b is formed.

22 is the stepped portion 21b of the combustor main body 21 and the burner plate 6;
This is a substantially elliptical disc spring inserted between the

Incidentally, the combustor 20 is constructed by collinearly aligning the flame port plate 7 and the secondary air guide plate 8 with the combustor main body 21 with the screws 11 as in the conventional manner.

The combustion operation of the combustion device having such a configuration is the same as the conventional one, and to briefly explain, a part of the air flowing around the combustor 20 is sucked in as primary air as the fuel is injected from the fuel injection nozzle 3 into the mixing chamber 10. The fuel and primary air are mixed to form a mixture.

This mixture is ejected from the flame port 12 and the inner and outer secondary air passages 1
It is combusted together with secondary air from 3° 14 to form a flame 15.

To explain the action of the disc spring 22 provided in this combustor 20, for example, the lower end surface around the flame port plate 7
1, the protruding portion is absorbed by the elastic deformation of the disc spring 220 when the burner port plate 7 is screwed, so that the combustor main body 21 and the burner port The contact surface with the plate 7 is in close contact, and the air-fuel mixture will not leak from the contact surface.

On the other hand, if the lower end surface of the center of the burner port plate 7 protrudes, the burner plate 6 cannot be held down even if the burner port plate 7 and the combustor main body 21 come into contact with each other. spring 22
By providing this, the burner plate 6 is pressed against the flame port plate 7 by the reaction force of the disc spring 220 when the burner plate 6 is pressed, so that the burner plate 6 is tightly attached and the mixture does not leak. Even if the machining accuracy is somewhat poor and there are variations, assembly can be performed without creating gaps, leakage of the air-fuel mixture from other than the flame port 12 can be prevented, and incomplete combustion can be eliminated.

As described above, according to the present invention, by simply providing a disc spring between the combustor body and the burner plate, it is possible to absorb the machining accuracy and variations in the components of the combustor and prevent leakage of the air-fuel mixture. It is possible to provide a closed combustion device with no fear of complete combustion.

Furthermore, since strict processing is not required, the cost is also low.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional combustion device, Fig. 2 is a sectional view of the same device, Fig. 3 is a front view showing an embodiment of the combustion device according to the present invention, and Fig. 4 is a sectional view of the same device. shows. 1... Combustion cylinder, 6... Burner plate, 7... Burner port plate,
DESCRIPTION OF SYMBOLS 10...Mixing chamber, 20...Combustor, 21...Combustor main body, 21a, 21b...Stepped portion, 22...Disc spring.

Claims (1)

[Scope of utility model registration request] A burner plate serving as a constituent wall of the mixing chamber and a burner plate having a plurality of flame ports for spouting the mixture from the mixing chamber are sequentially attached to a combustor body forming a mixing chamber for mixing fuel and primary air. A combustion device in which a combustor is supported in a combustion cylinder, and the combustor is configured to sandwich and fix the burner plate between the combustor body and the burner port plate when the combustor main body and the burner port plate are fixed with a fixture. Then, a stepped part for fitting the burner plate into the combustor body is formed, and a disc spring that is elastically deformed when the burner plate is fixed is provided between the stepped part and the burner plate, so that the burner plate is fixed to the burner plate. A combustion device characterized in that the combustion device is in pressure contact with a flame port plate to prevent leakage of air-fuel mixture from sources other than the flame port.