JPS6030571Y2 - rotary gasification burner - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a rotary gasification burner that automatically shifts liquid materials such as kerosene from raw combustion to vaporization combustion.

FIG. 1 is a sectional view showing an example of a rotary gasification burner. After scattering the liquid fuel sent from the opening periphery 4 of 3 through the oil feed pipe 5 toward the wall surface of the burner inner cylinder 6 located on the outer periphery of the vaporizer cylinder 3,
The ignition plug 7 is energized to cause live combustion (pilot combustion) in that part, and then the liquid fuel sent to the vaporization cylinder 3 is quickly converted into vaporized gas by the heating action of the vaporization cylinder 3 due to the live combustion, and the vaporized gas motor casing is heated. 1 through the combustion air introduction pipe 8 into the vaporizer cylinder 3, and the mixture is mixed with the forced air sent into the vaporizer cylinder 3 through the combustion air introduction pipe 8, and this mixture is passed from the blower cylinder 9 to the gas passage 11 formed by the burner inner cylinder 6 and the burner outer cylinder 10. guidance,
It is configured so that vaporization and combustion are carried out through a flame port 13 of a burner head 12 fixed to an opening of a gas passage 11.

However, when the rotary gasification burner is configured as described above, the gas passage 11 passes from the vaporization cylinder 3 through the blower cylinder 9.
After colliding at right angles with the bearing part 14 of the motor 2 and the bottom plate part 10a of the burner outer cylinder 10 located on its outer periphery, the air-fuel mixture sent to the motor 2 changes its direction. There is a problem in that the air-fuel mixture collides with the part at the same time as it is heated by the air, causing the air-fuel mixture to be cooled, causing a condensation phenomenon and returning to liquid.

The fuel that has returned to liquid form forms tar on the wall surface of the gas passage 11, or the fuel that has adhered to the wall surface flows down and accumulates in the lower part of the gas passage 11.

After that, when the temperature in the lower part of the gas passage 11 gradually rises due to combustion of the vaporized gas, the liquid fuel is vaporized again and is mixed with the air-fuel mixture sent to the lower part of the gas passage 11 and burned. There was also a drawback that the air in the gas passage 11 was insufficient, and red flames were generated from below the flame opening 13.

Furthermore, if the burner is extinguished before shifting to steady combustion, there is also the drawback that white smoke is generated due to the liquid fuel accumulated below the gas passage.

In view of the above-mentioned drawbacks, this idea was developed by providing an air chamber around the bearing of the motor that communicates with the motor casing and the gas passage, and at the same time, a centrifugal fan in front of the bearing that sucks air in from both axial directions and blows out air in the circumferential direction. The above-mentioned drawbacks have been eliminated by installing the device, and the configuration of this device will be described below with reference to the embodiments shown in the drawings.

FIG. 2 is a cross-sectional view showing the rotary gasification burner according to this invention. In the drawing, 20 is an outer cylinder forming a combustion chamber 21, 22 is a burner outer cylinder connected to the rear of the outer cylinder, and 23
is a burner inner tube installed inside the burner outer tube 22, 22a
23a is the bottom plate of the burner outer cylinder 22, and 23a is the bottom plate of the burner inner cylinder 23.

24 is a gas passage formed by the burner outer cylinder 22 and the burner inner cylinder 23, 25 is a burner head having a flame port 26 attached to the opening of the gas passage 24, and 27 is a bottom plate portion 23a whose rear end is the burner inner cylinder 23. This blower tube 27 is connected to the gas passage 24 .

28 is a motor casing located behind the burner outer cylinder 22, and 29 is a motor 30 located inside the motor casing 28.
This is a holding cylinder interposed between the burner outer cylinder 22 and the motor casing 28 in order to arrange the burner cylinder 29.
An inner cylinder 33 having a ventilation hole 32 communicating with the motor casing 28 and the gas passage 24 is provided on the outer periphery of the motor bearing part 31.
3, an air chamber 34 communicating with the motor casing 28 is formed on the outer periphery of the motor bearing portion 31.

35 is an air supply chamber that communicates with one end surface of the motor casing 28; 36 is an air supply chamber that is rotatably supported on the outer periphery of the blast tube 27 by a rotating shaft 30a of the motor 30 passing through the center of the blast tube 27; one side is open; , and a vaporizing cylinder 37 that communicates with the gas passage 24 described above via the blower cylinder 27.
is a combustion fan attached to a rotating shaft 30b extending to the rear of the motor 30.

Reference numeral 38 denotes a centrifugal fan installed on the rotating shaft 30a of the motor 30, which blows out the gas (mixture and air) sucked in from both axial directions in the circumferential direction. It is positioned between the rear end and the front end of the air chamber 34 formed by the inner cylinder 33.

Reference numeral 39 is a tapered cone-shaped diffuser fixed to the center of the end face of the vaporization cylinder 36, and 40 is an oil pipe for supplying liquid fuel such as kerosene to the rear surface of the diffuser.

Reference numeral 41 denotes an inner wall plate attached to the bottom plate portion 23a of the burner inner cylinder 23, and this inner wall plate 41 forms an air chamber 42 behind the vaporizing cylinder 36.

Reference numeral 43 denotes a combustion air introduction pipe that penetrates the gas passage 24 in order to communicate the air chamber 42 and the motor casing 28 via the holding cylinder 29. Books (e.g. 6 books)
Set it up.

44 is a flange portion 36 provided around the opening of the vaporization cylinder 36
45 is an air passage formed between the flange portion 36a of the carburetor cylinder 36 and the inner wall plate 41, and 46 is a spark plug for starting main combustion.

In the above configuration, when the motor 30 is driven and the carburetor 36, the centrifugal fan 38, and the combustion fan 37 attached to the rotating shafts 30a and 30b of the motor 30 are rotated, the combustion fan 37 causes the air supply chamber 35 to The air blown into the motor casing 28 from the inner cylinder 3
The combustion air flows into the air chamber 34 provided on the outer periphery of the motor bearing part 31 through the ventilation hole 32 provided in 3, and is blown out from the air chamber 34 into the gas passage 24.
The gas is sent to the air chamber 41 through the vaporizer cylinder 36 and the blower cylinder 27 into the gas passage 24, and is blown out from the air passage 45 to the outer periphery of the vaporizer cylinder 36.

The air blown into the gas passage 24 from the blower tube 27 and the air chamber 34 and the air blown into the gas passage 24 from the air chamber 34 are changed in direction by the centrifugal fan 38, and then the air is blown into the gas passage 24. It blows out into the combustion chamber 21 from the flame port 26 of the burner head 25 installed in the opening.

When liquid fuel is supplied from the oil pipe 40 onto the diffuser 39 located inside the vaporizer tube 36 in this state, the centrifugal force generated by the rotation of the vaporizer tube 36 causes the liquid fuel to flow from the surface of the diffuser 39 into the vaporizer tube 36. Moving to the peripheral surface, and further to the vaporizing tube 3
6 to the net-like member 44 fixed to the flange portion 36a of the vaporizer tube 3
The spray scatters toward the outer periphery of the air passage 45 and mixes with the air blown out from the air passage 45.

If the spark plug 46 is energized in this state, it will ignite and raw combustion will occur on the outer periphery of the carburetor cylinder 36.

When the vaporizer cylinder 36 is heated by combustion, the vaporizer cylinder 36
The liquid fuel in the gas passage 24 is vaporized, and a mixture of this vaporized fuel and the forced air sent from the air chamber 41 passes through the gas passage 24 from the blast tube 27 and is delivered to the burner head installed at the opening of the gas passage 24. It vaporizes and burns from the flame port 26 of 25.

At this time, the air-fuel mixture sent from the blast tube 27 into the gas passage 24 is changed in its direction by the centrifugal fan 38, and the motor bearing 31 and the burner outer cylinder 2 located on the outer periphery thereof are
Since it is possible to prevent spraying directly onto the bottom plate part 22a of 2,
The air-fuel mixture is cooled and no condensation phenomenon occurs.

Also, a part of the air sucked into the motor casing 28 is supplied to an air chamber 34 provided on the outer periphery of the motor bearing part 31, and is blown out in the circumferential direction by a centrifugal fan 38 at the same time as cooling the motor bearing part. Thus, an air curtain is formed along the bottom plate portion 22a of the burner outer cylinder.

Therefore, since the air-fuel mixture is prevented from coming into contact with the bottom panel portion 22a, condensation of the air-fuel mixture can be further prevented.

Note that the above description is based on the air chamber 3 on the outer periphery of the motor bearing portion 31.
Motor casing 2 is attached to inner cylinder 33 for forming motor casing 2.
Although the case where the ventilation hole 32 communicating with the inner cylinder 33 is provided has been described, if a space is formed between the holding cylinder 29 and the motor 30, the ventilation hole 32 does not need to be provided in the inner cylinder 33.

As explained above, this invention provides an air chamber 34 on the outer periphery of the motor bearing part 31 that communicates with the motor casing 28 and the gas passage 24, and also provides suction in the front of the motor bearing part 31 from both axial directions. Since the blowing centrifugal fan 38 is installed, the air-fuel mixture can be smoothly diverted from the axial direction to the circumferential direction, and an air curtain can be formed on the bottom panel 22a of the burner outer cylinder 22, and the blower cylinder 27
The air-fuel mixture sent into the gas passage 24 through this can be prevented from being directly blown onto the motor bearing portion 31 and the bottom plate portion 22a of the burner outer cylinder 22 located on the outer periphery thereof.

Therefore, the motor bearing portion 31 can be prevented from being heated by the air-fuel mixture.

In addition, the direction of the air-fuel mixture is changed by the centrifugal fan 38 so that the air-fuel mixture is not blown directly onto the motor bearing portion 31 and the bottom plate portion 22a of the burner outer cylinder 22 located on its outer periphery. This can prevent condensation from occurring when sprayed on the surface.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an example of a rotary gasification burner;
FIG. 2 is a sectional view showing the rotary gasification burner according to this invention. 22... Burner outer cylinder, 23... Burner inner cylinder, 24... Gas passage, 26... Burner port, 27... Air blower Tube, 28...Motor casing, 30...Motor, 30a...
... Rotating shaft, 31 ... Motor bearing part, 3
4...Air chamber, 36...Carbonizer cylinder, 38
・・・・・・Centrifugal fan.

Claims (1)

[Scope of utility model registration request] A vaporizer cylinder 36 supported by a rotating shaft 30a of a motor 30 disposed in a motor casing 28, a gas passage 24 having a flame port 26 formed by an outer burner cylinder 22 and an inner burner cylinder 23, and the vaporizer cylinder 36. It consists of a blower tube 27 that communicates with the gas passage 24, and a mixture of fuel and air vaporized in the vaporizer tube 36 is guided from the blower tube 27 to the gas passage 24, and a flame provided at the opening of the gas passage 24 is connected to the gas passage 24. mouth 26
In the rotary gasification burner that vaporizes and burns the
An air chamber 34 that communicates with the motor casing 28 and the gas passage 24 is provided on the outer periphery of the bearing portion 31 of the motor 30, and the rear end of the air tube 27 and the front end of the air chamber 34 are provided on the rotating shaft 30a of the motor 30. A rotary gasification burner characterized in that a centrifugal fan 38 for sucking in from both axial directions and blowing out in a cylindrical direction is attached to a portion located between the two.