JPH0229380Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a rotary oil burner.

(Prior Art) Rotary oil burners are conventionally generally driven by a belt. However, if you use this as a direct connection method,
There is no need to worry about damage to the belt due to vibrations, loosening, etc., or breakage of the belt, and unmanned operation is also possible. In addition, increasing the rotation speed promotes the atomization of fuel oil (abbreviated as oil), which mixes well with air, allowing complete combustion and low-oxygen combustion, improving thermal efficiency. Also, since the oil particles are small and burn out in a short time, it is possible to downsize the boiler by reducing the size of the combustion chamber. Furthermore, high-speed air can be sent, making it possible to downsize the high-speed air blower. Furthermore, since the momentum of oil atomization is large, even high viscosity oil, such as inferior C heavy oil, can be further atomized.

(The problem that the invention aims to solve) However, in reality, how to obtain a direct-coupled high-speed rotary oil burner that satisfies these demands is due to its mechanism, that is, the supply of oil into the atomizing cup that rotates at high speed. In addition, primary air (atomizing air) must be supplied to the part where the oil is atomized.Due to the mechanism, measures must be taken to prevent oil backflow, flame ignition, and related measures to separate air and oil. The difficult question was what to do.

In view of the above, the present invention has been developed to solve these problems.

(Means for Solving the Problems) That is, the present invention consists of an atomizing cup that is attached to a drive shaft directly connected to a motor through a discharge port with a bolt that is screwed into a mounting hole of the drive shaft, and an atomizing cup that is coaxial with the drive shaft. In a rotary oil burner with a primary air fan mounted on the motor, the motor is equipped with means for converting to a higher frequency, such as an inverter, and a fixed lubrication bracket is mounted on the fan cover for supplying the fuel oil into the atomizing cup. a passage in such a fixed lubrication bracket in which the drive shaft rotates within the fixed lubrication bracket; a peripheral opening in the rotary outlet that integrates the atomizing cup with the drive shaft; A cavity formed by a recess on the outlet side and an outer peripheral surface of the oil filling bracket is provided between the outlet and the outlet, and an oil backflow prevention screw, that is, a cavity on the inner surface of the outlet side where the inner periphery of the outlet faces the outer periphery of the oil filling bracket, is provided between the outlet and the outlet. A screw is provided that causes fuel oil to flow toward the cavity side by rotation, and the discharge port and the oil supply bracket cover the outside of the opposing surfaces in the direction perpendicular to the axis and overlap, so that either the oil supply bracket or the discharge port is connected to the outer periphery of the other. An oil and air separation extension extending in the axial direction on the surface is provided, and multiple flame prevention air passages are provided between the oil filling bracket and the discharge port to supply flame prevention air into the atomizing cup. This rotary oil burner is characterized by the following:

The present invention will be explained below in an easy-to-understand manner with reference to illustrative drawings. In Figures 1 and 2 illustrating the present invention,
In the figure, 1 is an atomizing cup rotatably driven by a shaft 13 directly connected to a motor, 2 is a primary (atomizing) air nozzle, 3 is a primary air fan installed coaxially with the atomizing cup, and 4 is primary air. damper, 5 is a primary air inlet, 6 is a motor (variable rotation speed), 7 is fuel oil released from the atomizing cup, 8 is primary air, 9 is a secondary (combustion) air damper, 10 1 is a wind box, 11 is secondary air from a blower, 12 is a flame-holding plate, and 30 is a pilot burner, which are the same as in the prior art, but the present invention is particularly constructed as follows.

Unique configuration: (a) The motor 6, which is directly connected to the shaft 13 that rotates the atomizing cup 1, is connected to an inverter 14 through a wire 15.

(b) The oil is integrated into the fan cover 17 as shown by the arrow 7, and the drive shaft 13 is fed inside the fan cover 17.
Passage 2 in the stationary lubrication bracket 18 in which the
8 and connect the atomizing cup 1 to the drive shaft 1.
A cavity 2 is formed between the lubrication bracket 18 and the discharge port 16 by the recess on the outlet side and the outer circumferential surface of the lubrication bracket.
There is a backflow prevention screw 19 on the circumferential surface S on the outlet side where the inner periphery of the outlet 16 faces the outer periphery of the oil filling bracket 18, that is, a screw that creates an oil flow toward the cavity 20 by rotation of the outlet. is cut out.

(c) The outlet 16 and the lubrication bracket 18 cover the outside of the surface T that faces each other in the direction perpendicular to the axis.
Either the bracket 6 or the bracket 18 (18 in the figure) extends in the axial direction in a cylindrical shape, and one overlaps the other.

(d) Lubricating bracket 18 and discharge port 16 for introducing air to prevent flames into the atomizing cup 1
A plurality of air passages 26 and 27 are provided for preventing flame ignition.

(E) The hottest part of the rotary oil burner is the inside of the atomizing cup, but the discharge port 1
The base of the bolt 23 for fixing the bolt 23 to the drive shaft 13 via the cup fitting 24 and the mounting hole 25 of the drive shaft 13 are provided with screws so as to be screwed together at a depth recessed from the tip of the drive shaft 13.

(Function) The structure and combustion mechanism of the burner in the present invention will be described.

The burner is driven by a motor 6 and consists of an atomizing cup 1, a primary (atomizing) air fan 3, and the like.

The primary air 8 made high pressure by the primary air fan 3 passes inside the fan cover 17 as shown by the arrow.
The primary air nozzle 2 gives it a swirl and blows it out (the amount and pressure of the primary air are adjusted by the primary air damper 4 provided on the suction port 5 side).

As shown by the arrow, fuel oil (oil) 7 passes through the oil filling bracket 18 and is once stored in the discharge port 16.
Atomizing cup 1 from several holes in the discharge port
It flows inside. Further, it advances on the inner surface of the atomizing cup, which rotates at high speed, and is emitted from the tip of the cup in a direction perpendicular to the burner axis due to centrifugal force.

The moment the fuel oil 7 leaves the tip of the atomizing cup 1, it collides with the primary air 8 to promote atomization, and is scattered in the direction of the resultant force of the fuel oil discharge direction and the primary air jet direction, and the burner The atomization process is performed as follows.

Ignition is by pilot burner 3 built into the burner.
(Usually propane gas is used as fuel for the pilot burner).

The air required to burn the atomized fuel oil is supplied by a separate blower as shown by the arrow, secondary air (combustion air).
11 (the amount and pressure of the secondary air are adjusted by the secondary air damper 9 provided on the suction port side).

However, in the present invention, the above-mentioned unique configuration (a) ~
(e) fulfills functions such as (a)′ to (e)′.

(a)′ According to (a) above, the motor can rotate at high speed by increasing the frequency with the inverter.

(b)' The above (b) prevents the oil 7 fed into the atomizing cup 1 from flowing back from the cavity 20 to the inner space 21 of the fan cover 17.

(d)' Due to the above (d), the inside of the atomizing cup 1 does not become negative pressure, and the flame is not drawn into the cup, and sludge is generated due to overheating inside the cup and incomplete combustion of oil. do not have.

(c)' According to the above (c), the oil 7 fed into the atomizing cup 1 can be prevented from leaking out from the cavity 20 to the side of the flame prevention air space passage 22 and mixing with air and oil.

(e)' The above (e) prevents the threaded portion of the mounting bolt from burning out and facilitates the removal of the cup.

(Effects of the invention) As described above, according to the invention, it is possible to obtain a rotary oil burner that has sufficient measures to prevent oil backflow, negative pressure (flame entry), and separation of air and oil, and has good combustion. Furthermore, if necessary, a rotary burner with sufficient burnout prevention measures and even longer life can be obtained, which has a great effect in making it possible to put a direct-coupled rotary burner into practical use.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view of the burner of the present invention, Fig. 2 is an enlarged view of the main part of Fig. 1, and Fig. 3 is A-A in Fig. 2.
A sectional view is illustrated respectively. 1...Atomizing cup, 2...Primary (for atomization) air nozzle, 3...Primary air fan, 4...
...Primary air damper, 5...Primary air suction port, 6...
...Motor (variable rotation speed), 7...Fuel oil, 8...
Primary air, 9...Secondary (combustion) air damper, 1
0... Wind box, 11... Combustion (secondary) air (from the blower), 12... Flame holding plate, 13... Drive shaft, 1
4...Inverter, 15...Wire connection, 16...Discharge port, 17...Fan cover, 18...Lubrication bracket, 19...Backflow prevention screw, 20...Cavity, 2
1...Space, 22...Space passage, 23...Bolt, 24...Cup fitting, 25...Mounting hole, 26...Air passage for preventing flame ignition, 27...Air passage for preventing flame ignition.

Claims (1)

[Claims for Utility Model Registration] (1) An atomizing cup that is attached to a drive shaft directly connected to the motor through the discharge port with a bolt that is screwed into the mounting hole of the drive shaft, and an atomizing cup that is attached coaxially with the atomizing cup. In a rotary oil burner with a primary air fan, the motor is provided with means for converting to a higher frequency, such as an inverter, and a fixed lubrication bracket is integrated into the fan cover for supplying fuel oil into the atomizing cup. a fixed lubrication bracket in which the drive shaft rotates, a passageway in such a fixed lubrication bracket, a peripheral opening in a rotating outlet that integrates the atomizing cup with the drive shaft, and a peripheral opening in the lubrication bracket and the outlet. A cavity formed by a recess on the discharge port side and an outer circumferential surface of the lubrication bracket is provided in between, respectively.
An oil backflow prevention screw, that is, a screw that allows fuel oil to flow toward the cavity side by rotation of the discharge port, is installed on the inner surface of the discharge port side where the inner circumference of the discharge port faces the outer circumference of the oil filling bracket, and the shaft of the discharge port and the oil filling bracket are perpendicular to each other. An extension part for separating oil and air is provided in which one of the oil inlet brackets and the discharge port extends in the upper axial direction of the outer circumferential surface of the other, covering the outside of the surfaces facing each other in the direction, and furthermore, an extension part for separating oil and air is provided inside the atomizing cup. A rotary oil burner characterized in that a plurality of flame prevention air passages are provided between the oil filling bracket and the discharge port to supply flame prevention air. (2) The utility model registration claim described in paragraph (1) states that the bolt that attaches the atomizing cup to the drive shaft through the discharge port and the mounting hole of the drive shaft are screwed together at a depth sunk below the tip of the shaft. rotary oil burner.