JPH06307289A - Rotary drive device by alame jet - Google Patents

Abstract

PURPOSE:To provide large rotary drive force by utilizing propulsion force by flame jet. CONSTITUTION:Hollow arms 2 are extended in radiation directions from a rotary shaft 1 provided rotatably, and jet nozzles 4 are fitted to the tips of the hollow arms 2. Fuel pipes 9 to be connected to a fuel supply source via a swivel fitting 10 are supported by the hollow arms 2, and initial rotation is given to the rotary shaft 1 to take air in the hollow arms 2 from air intakes 2a. The air is pressure-compressed by the centrifugal force to be fed in the jet nozzles 4 to be mixed with fuel fed from the fuel pipes 9 and be ignitted in the jet nozzles 4, jetting flame jet from the jet nozzles 4. Then the hollow arms 2 are rotated by the propulsion force generated by this flame jet to give a rotary drive force to the rotary shaft 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary drive device which obtains rotary drive force by using a flame jet.

[0002]

2. Description of the Related Art Conventionally, for driving equipment that requires a large rotational driving force, such as a large generator or a propeller of an aircraft,
Gas turbines were commonly used. The gas turbine includes a turbine, a compressor, and a combustor, as is well known.
The air compressed by the compressor is introduced into a combustor, mixed with fuel and burned, and the turbine is rotated by high-temperature and high-pressure gas discharged from the combustor.

[0003]

However, in the gas turbine described above, not only the structure of the turbine, the compressor and the combustor itself, which are the main constituent elements, is complicated, but also the auxiliary elements for systematically combining these elements. There is a problem in that the size of the device becomes large and the entire structure is inevitably complicated and large, and the manufacturing cost is significantly increased.

The present invention has been made in view of the above problems of the prior art, and provides a new rotary drive device which replaces a gas turbine and which obtains a large rotary drive force by utilizing the propulsive force of a flame jet. The purpose is to do.

[0005]

In order to achieve the above object, the present invention extends at least two hollow arms in a radial direction from a rotary shaft provided rotatably, and the rotary arms are provided at the tips of the hollow arms. A jet injection pipe arranged on the same pitch circle centered on the axis of the shaft and having an injection port opened in the tangential direction of the pitch circle is attached, and an air inlet is provided at the base end of the hollow arm, and An air outlet communicating with the jet injection pipe was provided at the tip end, and the hollow arm was connected to a fuel supply source through a swivel joint provided at one end in the jet injection pipe and at the other end on the rotary shaft. It is characterized in that the fuel tube is supported, and the starting means for giving an initial rotation to the rotary shaft and the ignition means for igniting the air-fuel mixture in the jet injection pipe are provided.

[0006]

In the rotary drive device using the flame jet configured as described above, when the rotating shaft is initially rotated by the starting means, air is taken into the hollow arm from the air intake port, and this air is compressed by centrifugal force. When the compressed air is mixed with fuel and ignited in the jet injection pipe, the flame jet is injected from the jet injection port of the jet injection pipe, and the hollow arm rotates the rotating shaft by the propulsive force. It rotates to the center, and a large rotational driving force is generated on the rotating shaft.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a rotary shaft rotatably supported by a bearing (not shown), and a tip end portion of the rotary shaft extends in a left-right direction orthogonal to the axis of the rotary shaft 1. The proximal end of the hollow arm 2 is attached using a support ring 3. The hollow arm 2 has an airfoil cross section, and an air intake 2a is provided at a base end portion of the hollow arm 2 so as to be opened to the front side in the rotation direction A of the rotary shaft 1. A jet injection pipe 4 is attached to the tip of each hollow arm 2 so as to be located on the same pitch circle centered on the axis of the rotary shaft 1. The jet injection pipe 4 has an air chamber 5 and a throttle unit 6 inside.
And the combustion chamber 7 in order, and the injection port 8 provided in the combustion chamber 7 is opened to the tangential direction of the pitch circle and to the rear side in the rotation direction A of the rotary shaft 1. The hollow arm 2 and the jet injection pipe 4 are connected at a portion corresponding to the air chamber 5 of the jet injection pipe 4, so that air is directly supplied into the air chamber 5 from the air outlet 2b at the tip of the hollow arm 2. Has become.

A fuel pipe 9 is joined to each hollow arm 2 along the outer surface thereof. The fuel pipe 9 has a fluid passage (not shown) provided at the rotary shaft 1 at one end thereof, a swivel joint 10 fitted to the rotary shaft 1 so as to communicate with the fluid passage, and extends from the swivel joint 10. While being connected to a fuel supply source (not shown) via a connection pipe 11, the other end is connected to a fuel injection nozzle 12 arranged in the air chamber 5 of the jet injection pipe 4. The tip of the nozzle 12 is directed to the throttle portion 6 between the air chamber 5 and the combustion chamber 7, and the fuel supplied from the fuel supply source through the fuel pipe 9 is mixed with the air passing through the throttle portion 6. It is like this.
In FIG. 1, 13 is a bracket for fixing the position of the swivel joint 10. Further, although not shown, a starting means (not shown) for giving an initial rotation to the rotary shaft 1 and an ignition means (not shown) for igniting the air-fuel mixture in the combustion chamber 7 are separately provided. A flow rate control valve (not shown) for controlling the flow rate of fuel is provided in each of the hollow arm 2 and the fuel pipe 9.

In the rotary drive device constructed as described above, when the rotating shaft 1 is initially rotated in the direction of the arrow A by a start-up means (not shown), the pair of hollow arms 2 are rotated by the rotary shaft 1.
The air inside each hollow arm 2 flows toward the tip end side while being pressurized and compressed by the centrifugal force, and accordingly, the air is taken into the hollow arm 2 from the air intake port 2a. The air introduced into the hollow arm 2 continuously flows toward the air outlet 2b at the tip of the hollow arm 2 while being compressed and compressed by the centrifugal force as described above, and the air is discharged from the air outlet 2b to the jet injection pipe 4. It is supplied to the air chamber 5.
The centrifugal force acting on the air in the hollow arm 2 is equal to the distance from the rotating shaft 1 and the rotation speed (angular speed) of the hollow arm 2.
Since it is proportional to the power, high-pressure compressed air can be obtained at the tip end side of the hollow arm 2 by appropriately setting the length and the angular velocity of the hollow arm 2. The high-pressure compressed air supplied to the air chamber 5 of the jet injection pipe 4 is throttled by the throttle portion 6 of the jet injection pipe 4 and sent to the combustion chamber 7 at high speed.

On the other hand, from a fuel supply source (not shown) to the connecting pipe 1
The fuel fed to No. 1 is supplied to the fuel pipe 9 through the swivel joint 10 and the liquid passage in the rotary shaft 1. Since the fuel pipe 9 rotates integrally with the hollow arm 2, the fuel in the fuel pipe 9 also flows to the tip of the fuel pipe 9 while being pressurized by the centrifugal force, and is atomized from the nozzle 12 to be squeezed. It is mixed with the air passing through 6. In this way, the mixture of compressed air and fuel is sent at high speed and high pressure to the combustion chamber 7 of the jet injection pipe 4, and is ignited by an ignition device (not shown). Then, the air-fuel mixture burns explosively, the flame jet is ejected from the injection port 8 to the outside, and a propulsive force is generated. The propulsive force causes the hollow arm 2 to rotate about the rotary shaft 1 and A large rotational driving force is generated on the rotary shaft 1. The starting means is stopped at the same time when a flame jet is generated by ignition.

Therefore, for example, if the rotary shaft 1 is connected to the rotor of the generator, the gas turbine having the complicated and large structure described above becomes unnecessary, which is extremely advantageous in terms of cost. Further, for example, if the hollow arm 2 is used as a blade of a helicopter, the number of newly added devices will be small, such as the jet injection pipe 4, and the utility value thereof will be further enhanced.

In the above embodiment, the pair of hollow arms 2 is attached to the rotary shaft 1. However, three or more hollow arms may be provided. When three or more hollow arms are provided, etc. It should be provided radially at the rotation angle.

[0014]

As described above in detail, according to the rotary drive device of the present invention, the compressed air and fuel utilizing the rotation of the hollow arm are introduced into the jet injection pipe at the tip of the hollow arm. By guiding it to generate a flame jet and rotating the hollow arm with its propulsive force to obtain a rotational driving force, a large rotational driving force can be obtained despite the simple structure, and it is possible to obtain a conventional gas turbine. There is an effect that an alternative economical rotary drive device can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a rotary drive device using a flame jet according to the present invention.

FIG. 2 is a plan view showing a part of the present rotary drive device as a cross section.

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

[Explanation of symbols]

 1 rotary shaft 2 hollow arm 2a air intake 2b air outlet 4 jet injection pipe 5 air chamber 6 throttle part 7 combustion chamber 8 injection port 9 fuel pipe 10 swivel joint

Claims (1)

[Claims] 1. At least two hollow arms extending in a radial direction from a rotatably provided rotary shaft, and arranged at the tip of each hollow arm on the same pitch circle centered on the axis of the rotary shaft. A jet injection pipe having an injection port opened in the tangential direction of the pitch circle is attached, an air intake is provided at the base end of the hollow arm, and an air outlet communicating with the jet injection pipe is provided at the tip thereof. The hollow arm supports a fuel pipe connected to a fuel supply source at one end inside the jet injection pipe and at the other end to a fuel supply source through a swivel joint provided at the rotary shaft, and imparts initial rotation to the rotary shaft. A rotation drive device using a flame jet, which is provided with a starting means and an ignition means for igniting an air-fuel mixture in the jet injection pipe.