JP3144748B2 - Oil burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil combustor in which petroleum fuel such as kerosene is atomized by an atomizer and then vaporized and burned by a vaporizer, and more particularly to an oil combustor having an improved atomizer. .

[0002]

2. Description of the Related Art Conventionally, as an example of this type of oil combustor, kerosene as an oil fuel is vaporized by a vaporizer.
Some have an atomizer for atomizing kerosene in order to promote the vaporization.

In this type of conventional atomizer, a cruciform spacer 2 is concentrically superimposed on an annular outer surface of a flange 1a at an opening end of a divergent cylindrical atomizer main body 1 shown in FIG. 7 is fixed to the outer surface of the spacer 2 by welding, and a disc-shaped diffusion plate 3 shown in FIG. 7 is fixed to the outer surface of the diffusion plate 3 and the outer surface of the flange 1a of the atomizer body 1. A small gap g corresponding to the thickness of the spacer 2 is formed in the cross-shaped notch portion of the spacer 2 between them.

The atomizer body 1 has a substantially conical frusto-conical atomizing cylinder 4 shown in FIG. 8 concentrically inserted therein and rotatably supported therein. The output rotary shaft 5 of the motor is concentrically fixed, and the atomizing cylinder 4 is rotated.

[0005] As shown in Fig. 8, the kerosene 6 is sprayed from a kerosene nozzle (not shown) onto the tapered surface 4a of the conical outer peripheral surface of the rotating atomizing cylinder 4 in the arrow direction in the figure. Is scattered by the centrifugal force of the atomizing cylinder 4 while being diffused in the direction of the dashed arrow in the figure, and is scattered outward from the minute gaps g in the centrifugal direction. It is designed to be scattered and vaporized on the inner surface of the vessel.

[0006]

However, in such a conventional atomizer, when the cross-shaped spacer 2 is fixed to the atomizer main body 1 by spot welding, if the spot welding is misaligned, the spacer is not fixed. 2 is eccentric with respect to the atomizer main body 1, the rotary shaft 5 of the motor rotatably supported by the spacer 2 is eccentric, and the atomizing cylinder 4 rotates eccentrically, so that the atomization efficiency is reduced.

Further, since the tapered surface 4a of the atomizing cylinder 4 extends toward the tip on the side of the diffusion plate 3, the kerosene directly collides mainly with the back surface (inner surface) of the diffusion plate 3, and the atomization effect is reduced. Reduce. Furthermore, since the atomizing motor and the vaporizer are assembled to the oil combustor body (not shown), and the atomizer is mounted inside the narrow space of the vaporizer, the assembly workability and the position adjustment of the kerosene nozzle and the like are not possible. There is a problem that it is enough.

Accordingly, the present invention has been made in view of such circumstances, and an object of the present invention is to provide an oil combustor capable of improving both the atomizing performance and the assembling workability of an atomizer. It is in.

[0009]

The present invention is configured as follows to solve the above-mentioned problems.

The invention described in claim 1 of the present application (hereinafter referred to as the first
Of the present invention), a rotatable built-in atomizing cylinder that receives the jet of petroleum fuel inside the atomizer body built in the vaporizer, and fixed a diffusion plate to the opening end of this atomizer body. In a petroleum combustor having an atomizer, a convex portion is integrally formed on an abutting surface of the atomizer body that abuts on the diffusion plate to form a gap between the atomizer body and the diffusion plate. It is characterized by having been formed.

Further, according to the invention described in claim 2 of the present application (hereinafter referred to as a second invention), the convex portion is caulked to the outer peripheral edge of the diffusion plate, and the diffusion plate is fixed to the atomizer main body. It is characterized in that it is formed in a nail shape.

Further, according to the invention described in claim 3 of the present application (hereinafter, referred to as a third invention), the atomizing cylinder has a tapered surface receiving the jet of the petroleum fuel and a petroleum fuel received by the tapered surface. Are formed at an angle at which the combustion air diffuses toward the upstream side.

Further, in the invention described in claim 4 of the present application (hereinafter, referred to as a fourth invention), the diffusion plate is formed to have a smaller diameter than the opening of the vaporizer main body through which the atomizer after assembly is inserted. It is characterized by having.

[0014]

[Action]

<First to Fourth Inventions> Since the projections are integrally formed on the contact surface of the atomizer body that contacts the diffusion plate, a gap is formed between the diffusion plate and the atomizer body. From the gap, atomized petroleum fuel that is scattered and scattered while being diffused by the centrifugal force of the rotating atomizing cylinder is scattered, scattered in the vaporizer and vaporized.

That is, according to the present invention, by forming the convex portion integrally with the atomizer main body, the conventional spacer interposed between the atomizer main body and the diffusion plate can be omitted,
The number of parts can be reduced, and the operation of welding the spacer to the atomizer body can be omitted, so that the assembling workability can be improved.

Further, since the conventional spacer can be omitted,
The atomization effect due to the eccentricity of the spacer can be prevented, and the atomization performance can be improved accordingly.

<Second Invention> Since the diffusion plate is fixed to the atomizer main body by caulking the claw-shaped convex portions, the assembling workability is improved as compared with the conventional example in which the diffusion plate is fixed to the atomizer main body by welding. Can be improved.

<Third invention> When petroleum fuel such as kerosene is injected onto the tapered surface of the rotating atomizing cylinder, the fuel is scattered while diffusing from the tapered surface toward the upstream side of the combustion air flow. Therefore, it is possible to prevent the kerosene from directly hitting the fuel diffusion plate and reducing the atomization effect as in the conventional example.

<Fourth invention> Since the diffusion plate having the largest diameter in the atomizer is formed to have a smaller diameter than the opening of the vaporizer main body through which the assembled atomizer is inserted, the vaporizer main body is formed. Since the assembled atomizer can be inserted through the opening and assembled, the assembling workability can be further improved.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same or corresponding parts in FIGS. 1 to 5 are denoted by the same reference numerals.

FIG. 2 is a partial vertical sectional view showing the entire structure of one embodiment of the oil combustor according to the present invention. In the figure, an oil combustor 11 has an air inlet 13 at one end of a cylindrical wind tube 12.
And a hot air outlet 14 is opened at the other end so that the combustion air flows in the direction of the small arrow in the figure.

The mixing tube 16 of the vaporizer 15 is built in the inside of the cylinder 12. The outer periphery of the outlet 16a of the mixing tube 16 has a cylindrical burner plate 17 and a burner cup 18, both of which are cylindrical.
And a burner outer cylinder 19 at predetermined intervals, and sequentially cover them in this order. A burner cup 18 has an ignition plug 20 and a frame rod 21 attached thereto.
The kerosene is burned on the outer peripheral surface of the to produce a flame 22.

The burner outer cylinder 19 is provided with a vaporizing heater 23, and a rectifying plate 24 for rectifying an air flow is disposed near the vaporizing heater 23. The rectifying plate 24 has a motor mounted on its inner peripheral portion. The plate 25 is fixed to a nose plate 26 having a nose 26a opened at its inner center,
An atomizing motor 27 is mounted on the motor mounting plate 25. The tip of the output rotary shaft 27 a of the atomizing motor 27 extends from the nose opening 26 a into the mixing cylinder 16, and
8 is concentrically fixed to the atomizing cylinder 29 so as to rotate the atomizing cylinder 29.

The atomizing cylinder 29 is rotatably housed in a cylindrical atomizer main body 30. A nozzle of a nozzle pipe 31 is opened near the tapered surface 29a of the atomizing cylinder 29, and the oil fuel is supplied from the nozzle. For example, kerosene is pressurized and injected by an electromagnetic pump (not shown).

As shown in FIGS. 3A and 3B, both ends in the axial direction of the atomizer main body 30 are opened, and an outward flange 30f is integrally formed at a distal end opening on the downstream side of the air flow. On the outer plane of the flange 30f, for example, four locking claws 32a, 32b, 32c, 32
d is integrally formed so as to protrude forward in an L-shape.

As an example of a method of forming the locking claws 32a to 32d, first, as shown in FIG. 3A, the flange 30f of the atomizer body 30 is slightly larger than the flange 30f indicated by a broken line 30e in the figure. Then, the portion indicated by the broken line 30e is cut out by punching or the like while leaving the portions of the locking claws 32a to 32d.

Thereafter, the portions of the locking claws 32a to 32d are made to protrude outward from the outer flat surface of the flange 30f by, for example, a plate thickness t by embossing or the like.
The outer ends of 2a to 32d are bent so as to stand substantially upright forward.

A disk-shaped diffusion plate 33 shown in FIGS. 4A and 4B is concentrically fixed to the flange 30f of the atomizer main body 30 constructed as described above. Diffusion plate 33
Are formed to have a smaller diameter than the nose opening 26a of the vaporizer 15 shown in FIG. 1, and can be inserted through the nose opening 26a, and the notches 34a, 34b, 34c and 34d are formed, respectively, and a center hole 340 is formed in the center.

Therefore, as shown in FIGS. 1A and 1B, the diffusion plate 33 is concentrically adhered to the flange 30f of the atomizer main body 30, and each of the notches 34a to 34d is provided in each of the notches 34a to 34d. The upright portions of the locking claws 32a to 32d are fitted and caulked inward to be fixed.

Therefore, as shown in FIG. 1 (B), between the outer surface of the flange 30f of the atomizer body 30 and the inner surface of the diffusion plate 33, each of the locking claws 32a to 32d extends outward. The gap g0 corresponding to the protruding portion is formed by each of the locking claws 32a to 32.
d are formed in the circumferential direction.

The atomizer body 30 has an atomizing cylinder 29 shown in FIGS. 5A and 5B concentrically built therein, and a motor rotation fixed to the atomizing cylinder 29. Shaft 27a
Is fitted in the center hole 340 of the diffusion plate 33 to rotatably support it.

As shown in FIG. 5 (B), the atomizing cylinder 29 has a tapered surface 29a for receiving the kerosene 35 injected from the nozzle of the nozzle pipe 31. The angle is formed so as to be scattered toward the upstream direction of the air flow indicated by the arrow.

Next, the operation of this embodiment will be described.

The kerosene is pressurized by an electromagnetic pump (not shown) or the like, and is turned from the nozzle of the nozzle pipe 31 to the rotating atomizing cylinder
9, and is scattered by the centrifugal force while being diffused in the upstream direction of the air flow as shown in FIG. 5B, and further diffused in the atomizer main body 30, and thereafter diffused by the diffusion plate It collides with the inner surface of 33 and is atomized and diffused in the form of a mist on the outer peripheral portion.

The kerosene thus atomized further scatters outward in the radial direction from the minute gap g0 between the inner peripheral surface of the diffusion plate 33 and the outer surface of the flange 30f of the atomizer main body 30, and Hit the wall. Since the wall surface of the vaporizer 15 is heated to, for example, about 200 ° C. to 240 ° C. by the vaporization heater 23, the mist-like kerosene hitting the wall surface is vaporized here.

The kerosene gas thus vaporized is ejected from the outer peripheral surface of the burner plate 17 through the mixing cylinder 16, and is ignited by an ignition plug 20 on the outer surface of the burner plate 17 and burns to generate a flame 22. The air for combustion is sucked into the air inlet 13 through the air inlet 13,
The air passes through the vaporizer 15 into and out of the vaporizer 15 and is used for combustion.

Therefore, according to the present embodiment, each locking claw 32 projecting from the outer surface of the flange 30f of the atomizer body 30 is provided.
a to 32d, the atomizer body 30 and the flange 3
Since the gap g0 is formed between the outer surface 0f and the outer plane 0f, the conventional spacer 2 itself shown in FIG. 6 is omitted to reduce the number of parts and to weld the spacer 2 to the atomizer body 30. Since it can be omitted, it is possible to improve the assembly workability.

Further, since the conventional spacer 2 can be omitted, it is possible to prevent the atomization performance from being lowered when the spacer 2 is eccentric when welding to the atomizer body 30.

Further, the diffusion plate 33 is connected to the atomizer main body 3.
Since the locking claws 32a to 32d are fixed by caulking to zero, the fixing work can be simplified as compared with the conventional case where the locking claws 32a to 32d are fixed by welding.

Further, as shown in FIG.
9, the kerosene 35 injected onto the tapered surface 29a is scattered so as to return to the upstream side of the air flow as shown by an arrow 36 in FIG.
Can be prevented from directly impinging on the diffusion plate 33 to reduce the atomization effect.

Further, since the diameter of the diffusion plate 33 is formed smaller than the diameter of the nose opening 26a of the vaporizer 15, after the vaporizer 15 is mounted in the oil combustor main body, the pre-assembled atomizer 28 is removed. Since the nose opening 26a can be inserted through the nose opening 26a and inserted into the carburetor 15, the operability can be further improved.

[0042]

As described above, the first invention of the present application is:
Since a protrusion is formed on the contact surface of the atomizer body that contacts the diffusion plate to form a gap between the diffusion plate and the atomizer body, a conventional spacer for forming the gap is omitted. be able to. For this reason, the number of parts can be reduced and the operation of fixing the spacer to the atomizer main body can be omitted, so that the assembling workability can be improved. Further, since the conventional spacer can be omitted, it is possible to prevent the atomization effect from being reduced due to the eccentricity of the spacer.

Also, in the second invention of the present application, the diffusion plate is fixed to the atomizer main body by caulking the claw-shaped convex portion, so that the diffusion plate is fixed to the atomizer main body by welding as compared with the conventional example. Workability can be improved.

Further, in the third aspect of the present invention, the angle of the tapered surface of the atomizing cylinder is formed such that the petroleum fuel injected on the tapered surface scatters toward the air upstream in the direction opposite to the diffusion plate. Therefore, it is possible to prevent the fuel from directly impinging on the diffusion plate to reduce the atomization effect.

According to the fourth aspect of the present invention, the diameter of the diffusion plate having the largest diameter in the atomizer is formed smaller than the opening through which the atomizer after assembly is inserted. Since the atomizer after assembling can be easily inserted, the assembling workability when the atomizer is installed in the vaporizer can be improved.

[Brief description of the drawings]

FIG. 1A is a front view of a main part of one embodiment of an oil combustor according to the present invention, and FIG. 1B is a half vertical sectional view of FIG.

FIG. 2 is a partial vertical sectional view of one embodiment of the oil combustor according to the present invention.

FIG. 3A is a front view of the atomizer main body shown in FIG. 2 and the like;
(B) is a half longitudinal sectional view of the same figure (A).

FIG. 4A is a front view of the diffusion plate shown in FIG. 2 and the like;
(B) is a sectional view taken along the line IVB-IVB in FIG.

FIG. 5A is a front view of the atomizing cylinder shown in FIG. 2 and the like, and FIG.
FIG. 2 is a half longitudinal sectional view of FIG.

FIG. 6 is a perspective view showing a state in which a spacer is attached to a conventional atomizer main body.

FIG. 7 is a perspective view of a conventional diffusion plate.

FIG. 8 is a vertical sectional view of a conventional atomizing cylinder.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 oil burner 12 air cylinder 13 air inlet 15 carburetor 16 mixing cylinder 17 burner plate 18 burner cup 19 burner outer cylinder 20 spark plug 21 flame rod 22 flame 23 vaporizer heater 24 rectifying plate 25 atomizing motor mounting plate 26 nose plate 26a Nose opening 27 Atomizing motor 27a Output rotation shaft 28 Atomizer 29 Atomizing cylinder 29a Tapered surface 30 Atomizer body 30f Flange 31 Nozzle pipe 32a-32d Locking claw 33 Diffusion plate 34a-34d Notch g0 Micro gap

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-29813 (JP, A) JP-A 61-192119 (JP, U) JP-A 60-71817 (JP, U) JP-A 61-19217 69621 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F23D 11/04-11/08

Claims (4)

(57) [Claims] 1. An atomizer main body built in a vaporizer,
An oil combustor having an atomizer for rotatably incorporating an atomizing cylinder for receiving a jet of petroleum fuel and having an atomizer for fixing a diffusion plate at an opening end of the atomizer body, wherein the diffusion plate of the atomizer body is provided. A petroleum combustor characterized in that a projection is formed integrally with a contact surface that comes into contact with a gas, and a gap is formed between the atomizer body and the diffusion plate. 2. The petroleum combustion according to claim 1, wherein the convex portion is caulked to an outer peripheral portion of the diffusion plate, and is formed in a claw shape for fixing the diffusion plate to the atomizer body. vessel. 3. The atomizing cylinder has a tapered surface that receives the jet of the petroleum fuel at an angle at which the petroleum fuel received by the tapered surface is diffused toward the upstream side of the combustion air. The oil combustor according to claim 1 or 2, wherein 4. The petroleum according to claim 1, wherein the diffusion plate has a smaller diameter than an opening of the vaporizer main body through which the assembled atomizer is inserted. Combustor.