JP2003269189A - Prime mover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a prime mover having a simple structure, and capable of efficiently and surely obtaining large rotational motive power. <P>SOLUTION: This prime mover 10 comprises a hollow rotary shaft 12 for rotatably journaling both sides, a hollow cylindrical body 16 penetratingly fixed to the hollow rotary shaft 12, and having inside a combustion chamber 14 for communicating with a hollow part of the hollow rotary shaft 12, a blowout nozzle 18 arranged by turning a blowout port 48 in the rotational circumferential tangent direction of the hollow cylindrical body 16, an air-fuel supply means 20 for supplying fuel and air in the combustion chamber 14, and an ignition means 22 for arranging an ignition point 44 in the combustion chamber 14. The fuel and the air are supplied to the combustion chamber 14 via the hollow part 36 of the hollow rotary shaft 12. The fuel is ignited in the combustion chamber 14 of the hollow cylindrical body 16. The rotational motive power is obtained by rotating the hollow cylindrical body 16 by blowout reaction from the blowout nozzle 18 of the combustion expanding air T. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prime mover for injecting combustion-expanded air in a tangential direction of rotation to obtain rotational power by the ejection reaction force.

[0002]

2. Description of the Related Art Conventionally, a prime mover including, for example, a gasoline engine, a diesel engine, a gas turbine or a jet engine has been widely used. For example, various inventions have been made with respect to a prime mover that obtains rotary power by injecting combustion gas or the like in the circumferential direction.
No. 241402 and Japanese Unexamined Patent Publication No. 50-100448.

[0003]

Problems to be Solved by the Invention JP-A-61-2414
In JP-A-02 No. 02, as shown in FIG. 5, combustion gas G flows from a rotary pipe 102 at the center of rotation of a rotor 100, and an injection port 104 attached to the rotor 100 burns from a nozzle 106 oriented in the circumferential direction. An injection type prime mover for injecting gas in a circumferential direction to obtain rotational power is disclosed.
However, in this prime mover, the combustion gas G generated at another place simply passes through the rotary pipe 102, the pipe 108 inside the rotor and the nozzle 106, and energy is generated inside the prime mover. I couldn't get a lot of rotation power because there wasn't one. Further, since a combustion chamber for generating combustion gas has to be separately provided, there is a problem that the device becomes large and the manufacturing cost is high.

Further, FIG. 6 is a diagram of Japanese Patent Application Laid-Open No. 50-100448.
1 shows a steam turbine combined injection-type rotary prime mover disclosed in Japanese Patent Publication No. JP-A-2003-242242. As shown in FIGS. 6 (a) and 6 (b), the injection type rotary prime mover part 200 of this prime mover is provided with four rods 204 in a substantially cross-radial shape from a rotary main shaft 202, and rotation of the rod 204. Combustion chamber 2 on each of the outer tips
08 is fixed, and the fuel supply path 20 inside the rod 204 is further fixed.
Fuel and air are pressure-fed to the combustion chamber via the 6a and the air supply passage 206b, and the combustion gas is injected toward the side wall 209 to rotate the combustion chamber 208 to obtain rotational power from the main shaft 202. is there. However, in this injection type rotary prime mover 200, since the fuel replenishing passage 206a and the air replenishing passage 206b are provided in the hollow inside of the radial rod 204, the inside of each rod is divided into two, so that the structure is complicated. It was a thing. Further, since the ignition plugs 211 are installed outside the air-mixed fuel injection ports of the four combustion chambers 208 to ignite the fuel, the structure is complicated and the manufacturing cost is high.
Further, since the spark plug 211 is attached to the outer portion of the combustion chamber 208 near the injection port, the fuel actually burns outside the combustion chamber, and the expansion energy of the combustion gas rotates around the combustion chamber. It was something that could not be used as a force to cause it. Therefore, since only small rotational power can be obtained by the injection reaction force when the fuel and air before combustion that are pumped inside the rod are injected from the combustion chamber, the injection-type rotary prime mover alone is very inefficient and practical. There was no nature. Therefore, as shown in FIG. 6B, a steam turbine 210 or the like using combustion heat must be provided as an auxiliary in order to take out effective rotational power,
Impeller 212, steam boiler 214, high-pressure steam pipe 2
Due to the equipment of 16 or the like, the structure was more complicated, the entire apparatus was large, and the manufacturing cost was high.

The present invention has been made in view of the above problems, and an object thereof is to provide a prime mover which has a simple structure and is compact in size as a whole and which can efficiently and reliably obtain a large rotational power. Especially.

[0006]

In order to solve the above-mentioned problems, a prime mover of the present invention has a hollow rotary shaft 12 which is rotatably supported on both sides and has a hollow interior, and a hollow rotary shaft 12 which penetrates the hollow rotary shaft 12. A hollow cylindrical body 16 that has a combustion chamber 14 that is fixed and communicates with a hollow portion 36 of the hollow rotating shaft 12 and that rotates integrally with the hollow rotating shaft 12, and that is provided so as to project from the rotation peripheral surface R of the hollow cylindrical body 16. An ejection nozzle 18 which is in communication with the combustion chamber in the hollow cylindrical body 16 and is provided with its ejection port 48 directed in the tangential direction of the rotational circumference,
An air / fuel supply means 20 for supplying fuel and air into the combustion chamber 14 in the hollow cylindrical body 16 including the hollow portion 36 of the hollow rotary shaft 12 and an ignition point 44 arranged in the combustion chamber 14 to form the combustion chamber. Ignition means 22 for freely igniting the fuel in 14;
A prime mover characterized in that the hollow cylindrical body 16 is ignited in the combustion chamber 14 of the hollow cylindrical body 16 and the hollow cylindrical body 16 is rotated by the ejection reaction force of the combustion expansion air T from the ejection nozzle 18 to obtain rotational power. It is composed of the device 10.

Further, the ignition point 44 of the ignition means 22 may be arranged close to the mounting position of the hollow rotary shaft 16 in the combustion chamber 14.

The air / fuel supply means 20 includes an air supply means 50 for pumping air from the outside using the hollow interior 36 of the hollow rotary shaft 12 as an air supply path, and a substantially central position of the hollow portion 36 of the hollow rotary shaft 12. The fuel supply means 52 for supplying the fuel so as to be mixed with the air by the air supply means 50.

The fuel supply means 52 is a hollow cylinder 16
The supply port 68 may be set at a substantially central position inside in the axial direction.

The hollow cylindrical body 16 is fixed in a state of penetrating the hollow rotating shaft 12, and is connected to the combustion chamber 14 via a plurality of communication holes 38 provided in the hollow rotating shaft 12 inside the hollow cylindrical body 16. The hollow portions 36 of the hollow rotary shaft 12 may be communicated with each other in a partitioned state.

Further, the fuel supply means 52 is the hollow rotary shaft 1
It is also possible to include a needle pipe-shaped fuel supply passage 62 that is inserted through the central portion of the second rotary shaft 12 and extends in the longitudinal direction of the hollow rotary shaft 12 and is connected to an external fuel supply source (60).

Further, the ignition means 22 may be composed of a discharge device 70 including a discharge element 74 arranged at the ignition point 44.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 are
1 shows an embodiment of a prime mover of the present invention, in which a prime mover of the present invention is burned inside a hollow rotary cylinder fixed to a hollow rotary shaft whose both sides are supported to rotate combustion expanded air. This is a prime mover that ejects in the tangential direction of the rotation peripheral surface of the tubular body and rotates the rotary tubular body by the ejection reaction force to obtain rotational power.

As shown in FIG. 1, a prime mover 10 according to this embodiment has a hollow rotary shaft 12 having a hollow interior, a hollow cylindrical body 16 having a hollow interior as a combustion chamber 14, and a rotation of the hollow cylindrical body 16. The ejection nozzle 18 protruding from the peripheral surface R and the combustion chamber 1
Air / fuel supply means 20 for supplying air and fuel to 4
And an ignition means 22 for igniting the fuel in the combustion chamber 14,
have.

As shown in FIG. 1 or 3, in this embodiment, the prime mover 10 is supported by a pair of bearing bodies 24 and 26 that rotatably support the hollow rotary shaft 12. In FIG. 1 or FIG. 3, the bearing body 24 side on the left side of the hollow rotary shaft 12 is the output side for transmitting the rotational power to the outside. As shown in FIG. 3, the bearing body 24 on the left side, that is, the output side, has the hollow rotary shaft 12 inserted horizontally through the bearing portion 25 to support the hollow rotary shaft 12 in the axial direction. On the other hand, the right side bearing body 26 has a bearing case 27 projecting from the side facing the left side bearing body 24, and a bearing 28 is built in the bearing case 27, and the right end side of the hollow rotary shaft 12 is inserted by the bearing 28. And is pivotally supported. Further, an opening 30 is provided on the upper surface side of the bearing body 26, and the inside of the bearing body 26 has an L-shape that connects the hollow inside of the hollow rotary shaft 12 pivotally supported by a bearing 28 and the opening 30 to each other in an L-shape. A hollow portion 32 is provided.

As shown in FIG. 1 or 3, the hollow rotary shaft 12 is made of a metal having a high heat resistance and a high pressure resistance, and a hollow interior 36 having a hollow interior is formed. As the metal used in this embodiment, for example, brass having high pressure resistance, hard, and easy to process may be used. Further, not limited to brass, any metal having heat resistance and pressure resistance may be used.
The right side of the hollow rotary shaft 12 has an opening 34, and the opening 3
4 communicates with the L-shaped hollow portion 32 of the bearing body 26, and serves as an air supply passage of an air supply unit described later. In this embodiment, the hollow rotating shaft 12 is fixed to the hollow cylindrical body 16 so as to penetrate through the hollow cylindrical body 16, and the hollow inside 36 of the hollow rotating shaft 12 and the hollow cylindrical body 16 are burned by the hollow rotating shaft. The room 14 is partitioned. A closing wall 4 that closes like a blind hole at a position that is on the left end side inside the hollow rotating shaft 12.
0 is provided. The closing wall 40 is provided in a triangular pyramid shape with its apex protruding toward the hollow interior 36 side. A plurality of small-diameter through holes 38 are bored in the peripheral wall of the hollow rotary shaft 12 inside the hollow cylindrical body 16, and the hollow interior 36 of the hollow rotary shaft 12 and the combustion chamber 14 communicate with each other through the through holes 38. Has been done. As a result, when air is pumped into the hollow rotary shaft from the opening 30 side, the air is made to flow into the combustion chamber 14 through the through hole 38.

As shown in FIGS. 1 to 3, the hollow cylindrical body 1
In this embodiment, 6 is formed of, for example, a metal having high heat resistance and pressure resistance similar to that of the hollow rotating shaft, and has a cylindrical shape. Both end surfaces of the cylinder of the hollow cylindrical body 16 are covered with a circular plate body 42 and are provided in a substantially hermetically sealed manner. The hollow cylindrical body 16 is fixed in a state where the hollow rotary shaft 12 vertically penetrates the center of the circular plate body 42, and the cylindrical peripheral surface becomes the rotary peripheral surface R. Combustion chamber 14 inside hollow cylinder 16
Is a space for burning the fuel supplied by the air / fuel supply means 20 to generate combustion expanded air T, which is a cylindrical space concentric with the hollow cylindrical body 16. As shown in FIG. 2 or FIG. 3, the ignition point 44 of the ignition means 22 is arranged in the combustion chamber 14, and the fuel in the combustion chamber 14 is freely ignited. A plurality of cooling members 45 are provided on the circular plate body 42 of the hollow cylindrical body 16 so as to project toward the outside. The cooling member 45 has a gap 45a between the cooling member 45 and the circular plate body 42, and widens the surface area of the circular plate body 42 to satisfactorily radiate the heat generated in the combustion chamber. The cooling member 45 may be, for example, a fin provided in a protruding manner, or may have any other shape. In an embodiment,
On the rotating peripheral surface R of the hollow cylindrical body 16, jet nozzles 18 are integrally provided at every 90 degrees. Further hollow cylinder 16
An exhaust hole 46 is provided corresponding to the mounting position of the jet nozzle 18 to connect the combustion chamber 14 for introducing and discharging the combustion expansion air T toward the jet nozzle 18 and the outside.

In FIG. 2, the ejection nozzle 18 is an air ejection nozzle for ejecting the combustion expansion air T generated in the combustion chamber 14 from the ejection port 48 to rotate the hollow cylindrical body. In this embodiment, the jet nozzle 18 is
It is formed in a substantially L-shaped tubular shape, and is fixed on the rotating peripheral surface R of the hollow cylindrical body 16 while communicating the inside thereof with the combustion chamber 14 through the exhaust hole 46, and the jet outlet 48 is further tangential to the rotating circumferential direction. It is provided to face. That is, in FIG. 2, assuming that the rotation direction of the hollow cylindrical body 16 is counterclockwise, when looking at the connection end side of the ejection nozzle 18 (exhaust hole 46 of the hollow cylindrical body 16) from the center of rotation, a right turn is made in a 90-degree direction. Spout 4
8 is provided so as to face. The size of the hollow cylindrical body, the volume of the combustion chamber, the size of the diameter of the ejection port 48, and the like are arbitrarily set according to the required rotation output.

As shown in FIG. 1 or 3, the air / fuel supply means 20 in this embodiment is provided with an air supply means 50 and a fuel supply means 52, and the hollow portion of the hollow rotary shaft 12 is provided. Combustion chamber 1 in hollow cylindrical body 16 via 36
4. Supply air and fuel into 4.

In this embodiment, the air supply means 50
Is, as shown in FIG. 3, an air pump 5 for compressed air feeding.
4 and an air supply path formed by the hollow portion 36 of the hollow rotary shaft 12 and the L-shaped hollow portion 32 of the bearing body 26. The air pump 54 is, for example, a compressor, and is a device that compresses air and sends the compressed air to the hollow interior 36 of the hollow rotary shaft 12 and the combustion chamber 14. The air pump 54 is connected to the upper surface side opening 30 of the bearing body 26 via an air supply pipe 58 having an air adjusting valve 56. The air compressed by the air pump 54 passes through the air supply pipe 58, passes through the L-shaped hollow portion 32 of the bearing body 26, is pressure-fed through the hollow inside 36 of the hollow rotary shaft 12, and is supplied to the combustion chamber 14 side. To be done. By configuring the inside of the hollow rotating shaft as the air supply path, the air can be reliably and efficiently sent to the combustion chamber side without complicating the structure.

In this embodiment, as shown in FIG. 3, the fuel supply means 52 comprises a fuel pump 60 as a fuel supply source and a fuel supply passage 62. As the fuel, for example, a liquid fuel such as gasoline, kerosene, light oil, heavy oil or a gaseous fuel such as propane gas may be arbitrarily selected and applied.
The fuel pump 60 is a device that pumps fuel to the fuel supply passage 62 and supplies it to the combustion chamber side.

In this embodiment, the fuel supply passage 62 is formed of a needle pipe-shaped fuel pipe 64 having a tapered discharge portion, and the hollow rotary shaft 12
Is horizontally inserted through the central portion of the bearing body 26 and the L-shaped hollow portion 32 of the bearing body 26, penetrates the left side wall of the bearing body 26, and is linearly arranged and fixedly supported. The fuel pipe 64 extends in the longitudinal direction from the fixed position with respect to the bearing body 26 toward the outside, and a fuel adjusting valve 66 is provided on the way to be connected to the external fuel pump 60. The tip of the discharge portion of the fuel pipe 64 is a fuel supply port 68.
8 is disposed in the hollow cylindrical body 16 of the hollow rotary shaft 12 at a substantially central position in the axial direction. That is, in the hollow of the hollow rotary shaft 12 in which the fuel supply port 68 is arranged, the through hole 3
The space corresponding to the portion where 8 is provided becomes the mixing space M, and the fuel injected from the fuel supply port 68 and the air pumped by the air supply means 50 are mixed in the mixing space M. This mixed gas is uniformly supplied to the combustion chamber 14 through the through hole 38 by the pressure-fed air.

In this embodiment, the ignition means 22 is
As shown in FIG. 3, the ignition device 70 and the ignition device circuit 7 are provided.
2 and a discharge device having. The ignition device 70 is formed of, for example, a spark plug, and has an ignition point 44 having a discharge element 74 arranged at one end and an input terminal 76 at the other end.
Is connected to the ignition circuit 72. The outer side surface of the ignition device 70 is covered with an insulator. As shown in FIG. 2, the ignition device 70 has an ignition point 44 in the combustion chamber 1.
It is arranged so as to be close to the hollow rotary shaft 12 in the hollow cylinder 4, and penetrates the eccentric position of the circular plate body 42 of the hollow cylindrical body 16 so that the insulator portion is fixed and supported by the circular plate body 42. The discharge element 74 is composed of a pair of electrodes with a slight gap, and when a high voltage current is applied to the input terminal 76, a spark is generated in the gap of the discharge element 74 to ignite the fuel in the combustion chamber. Also, FIG.
Alternatively, as shown in FIG. 3, the input terminal 76 of the ignition device 70
Are connected to a thin-walled annular conductor plate 78 that is fixed in an outwardly protruding shape from the outer surface of the hollow rotary shaft 12.

The igniter circuit 72 is connected to a power source (not shown) or the like, and generates a high voltage in an internal circuit to flow a current to the igniter 70 to cause a spark. As shown in FIG. 3, the ignition device circuit 72 includes a brush 7
It is connected to the annular conductor plate 78 via 9. Brush 79
Is, for example, a brush support 77 fixed to the bearing body 26.
The brush 79 has one end thereof brought into contact with an annular conductor plate 78 which rotates together with the hollow rotating shaft. Therefore,
The ignition device circuit 72 and the ignition device 70 are always in an electrically connected state, and the fuel in the fuel chamber 14 can be freely ignited.

Next, the operation of the prime mover according to this embodiment will be described. As shown in FIG. 3, the fuel pumped from the fuel supply passage by the fuel pump is injected from the fuel supply port in the mixing space in the hollow portion of the hollow rotating shaft. The injected fuel is mixed with the air pressure-fed through the air supply passage by the air pump and pressure-fed to the combustion chamber through the through hole. At the same time, the high-voltage current generated in the ignition circuit is
It flows through the brush to the circular conductor plate, flows to the ignition device, and sparks at the discharge element. Then, the fuel in the combustion chamber of the hollow cylindrical body is ignited by the sparks of the discharge element and burned to generate combustion expanded gas of high temperature and high pressure. As shown in FIG. 2, the combustion expanded air generated in the combustion chamber is ejected from the ejection nozzle in the tangential direction of the rotation circumference. Due to the ejection reaction force, the hollow cylindrical body and the hollow rotating shaft body rotate integrally to obtain rotational power.
As a result, it is possible to reliably and efficiently supply fuel and air that burn fuel and air to the combustion chamber without complicating the structure, and to generate large combustion expansion energy in the combustion chamber to reliably output large rotational power. it can.

Further, FIG. 4 shows an example of use in which the exhaust gas discharged from the prime mover 10 of the embodiment is reused. The high-temperature high-pressure combustion expanded air discharged from the prime mover 10 is drawn into the heat exchanger 80 and the exhaust gas boiler 82, and the thermal energy of the combustion expanded air is used for, for example, cooling and heating.
This allows energy to be used without waste.

The prime mover of the present invention is not limited to the above-mentioned embodiments, and any modification may be added within the scope not departing from the essence of the invention described in the claims. For example, the number of ejection nozzles is not limited to four, but 2
One or three pieces, or five or more pieces may be provided. Further, the hollow tubular body 16 may be provided in a triangular tubular shape, a quadrangular tubular shape, or a polygonal tubular shape having more than that.

[0028]

As described above, according to the prime mover of the present invention, a hollow rotary shaft whose inside is hollow and rotatably supported on both sides, and a hollow rotary shaft which is fixed to the hollow rotary shaft so as to penetrate therethrough. A hollow cylindrical body that has a combustion chamber communicating with the hollow section and that rotates integrally with the hollow rotating shaft; and a hollow circumferential cylinder projecting from the peripheral surface of the hollow cylindrical body and communicating with the combustion chamber inside the hollow cylindrical body An injection nozzle provided with its ejection port facing to the inside, an air / fuel supply means including a hollow portion of a hollow rotating shaft for supplying fuel and air into the combustion chamber in the hollow cylinder, and an ignition point arranged in the combustion chamber Ignition means for freely igniting the fuel in the combustion chamber,
In the combustion chamber of the hollow cylinder, the hollow cylinder has a structure in which the rotary cylinder is rotated by an ejection reaction force from the ejection nozzle of the combustion expansion air to ignite in the combustion chamber of the hollow cylinder to obtain rotational power. As a result of burning and jetting from the jet nozzle, a large amount of combustion expansion energy is generated in the combustion chamber by the combustion expansion air, and a large rotational power can be reliably obtained.
Further, since the fuel and the air are supplied through the hollow portion of the hollow rotary shaft, the air and the fuel can be efficiently supplied to the combustion chamber, and the entire device can be manufactured compactly without complicating the device, and the manufacturing cost is low. Can be

Further, since the ignition point of the ignition means is arranged close to the mounting position of the hollow rotary shaft in the combustion chamber, the fuel in the combustion chamber can be efficiently ignited by only one ignition device. You can Also, the structure is simple,
Manufacturing costs can also be reduced.

The air / fuel supply means includes an air supply means for pumping air from the outside using the hollow inside of the hollow rotary shaft as an air supply passage, and an air supplied by the air supply means at a substantially central position of the hollow portion of the hollow rotary shaft. By providing the fuel supply means for supplying fuel so as to mix with the air, the inside of the hollow rotary shaft is used as an air supply path, so that the air necessary for combustion can be reliably provided without complicating the structure. Can be supplied in large quantities. Also, since a large amount of air can be pumped and the air and fuel are mixed at the central position of the hollow part of the hollow rotary shaft, fuel that is easily mixed and ignited can be supplied to the combustion chamber to improve combustion efficiency and improve operating efficiency. You can get better.

Further, the fuel supply means is configured such that the supply port is set at a substantially central position in the axial direction inside the hollow cylindrical body, so that the fuel injected from the supply port and the air pressure supply means are pressure-fed. The air can be evenly mixed, and the fuel can be easily ignited, good combustion is performed in the combustion chamber, and the prime mover can be efficiently operated.

Further, the hollow cylindrical body is fixed in a state of penetrating the hollow rotary shaft, and the combustion chamber and the hollow portion of the hollow rotary shaft are connected to each other through a plurality of communication holes provided in the hollow rotary shaft which is the hollow cylindrical body. With the structure in which they are communicated with each other in a partitioned state, by supplying air and fuel from the inside of the hollow rotating shaft into the combustion chamber and partitioning the combustion chamber and the hollow portion of the hollow rotating shaft, combustion of the combustion chamber is achieved. It is possible to prevent the fuel in the hollow rotary shaft from being ignited and improve the safety and durability of the device.

Further, the fuel supply means includes a needle pipe-shaped fuel supply passage which is inserted through the central portion of the hollow rotary shaft and extends in the longitudinal direction of the hollow rotary shaft to be connected to an external fuel supply source. By doing so, the fuel supply path is arranged in the rotating shaft, so that the fuel can be supplied without complicating the structure and without disturbing the pressure feeding of air, and a low-cost and efficient prime mover can be provided. Can be manufactured. Further, since the fuel injected from the supply port and the air pressure-fed by the air pressure-feeding means are uniformly mixed, the fuel is easily ignited and the fuel cell can be efficiently operated.

Further, the igniting means can surely ignite the fuel in the combustion chamber by comprising the discharge device including the discharge element arranged at the ignition point. Further, it can be manufactured compactly and the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a prime mover of the present invention.

FIG. 2 is a partially cutaway arrow view of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a diagram showing an example of use in which jet air of a prime mover is reused.

FIG. 5A is a side view of a conventional prime mover, and FIG.
It is a partially notched front view of (a).

FIG. 6 (a) is a partial plan view of a conventional steam turbine combined injection type rotary prime mover, and FIG. 6 (b) is a side sectional view.

[Explanation of symbols]

10 prime mover 12 hollow rotating shaft 14 Combustion chamber 16 hollow cylinder 18 jet nozzle 20 Air / fuel supply means 22 Ignition means 44 ignition point 48 spout 50 Air supply means 52 Fuel Supply Means 62 Fuel supply path 68 Fuel supply port T Combustion expanded air

Claims (7)

[Claims] 1. A hollow rotary shaft having a hollow interior rotatably supported on both sides and a combustion chamber fixed to the hollow rotary shaft in a penetrating manner and communicating with a hollow portion of the hollow rotary shaft. A hollow cylindrical body that rotates integrally with the hollow rotating shaft; and an ejection nozzle that is provided so as to project from the rotational peripheral surface of the hollow cylindrical body and communicate with the combustion chamber in the hollow cylindrical body, with its ejection port facing in the tangential direction of the rotational circumference. , An air / fuel supply means including a hollow portion of a hollow rotary shaft for supplying fuel and air into a combustion chamber in a hollow cylinder, and an ignition means for arranging an ignition point in the combustion chamber to freely ignite the fuel in the combustion chamber A prime mover characterized by including: and igniting in the combustion chamber of the hollow cylinder to rotate the hollow cylinder by the reaction force of the jet of the combustion-expanded air from the jet nozzle to obtain rotational power. 2. The prime mover according to claim 1, wherein the ignition point of the ignition means is arranged close to the mounting position of the hollow rotary shaft in the combustion chamber. 3. The air / fuel supply means includes an air supply means for pumping air from the outside through an air supply path inside the hollow rotary shaft and an air supplied by the air supply means at a substantially central position of the hollow portion of the hollow rotary shaft. Fuel supply means for supplying fuel to mix with
The prime mover according to claim 1 or 2, further comprising: 4. The prime mover according to claim 3, wherein the fuel supply means has a supply port set at a substantially central position in the axial direction inside the hollow cylindrical body. 5. The hollow cylindrical body is fixed in a state of penetrating the hollow rotating shaft, and the combustion chamber and the hollow portion of the hollow rotating shaft are connected to each other through a plurality of communication holes provided in the hollow rotating shaft which is the hollow cylindrical body. The prime mover according to claim 3 or 4, which is communicated with each other in a partitioned state. 6. The fuel supply means includes a needle pipe-shaped fuel supply passage which is inserted through a central portion of the hollow rotary shaft and extends in the longitudinal direction of the hollow rotary shaft and is connected to an external fuel supply source. The prime mover according to any one of 3 to 5. 7. The prime mover according to claim 1, wherein the ignition means comprises a discharge device including a discharge element arranged at an ignition point.