JP2008019862A - Low pressure turbine driving method and low pressure turbine driving apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for driving a mechanism provided with a plurality of propellers being adjusted in diameter, the number of revolution, and the number of blades, which provides greater thrust with less propeller driving power corresponding to torque varying according to thrust. <P>SOLUTION: Air or water is blown to the vicinity of leading ends of propellers of a first moving vane at an angle of the fluid entering with respect to the blade section through fluid blowing nozzles to the propellers of the first moving vane from an air blowing blower or a water blowing pump, to thereby rotate the propellers of the first moving vane. The accelerated fluid is blown to propellers of a second moving vane which are greater in diameter than the propellers 3 of the first moving vane, to thereby rotate the propellers of the second moving vane. Air or water is blown to the vicinity of leading ends of the propellers of the second moving vane at an angle of the fluid entering with respect to the blade section through fluid blowing nozzles to the propellers of the second moving vane from an air blowing blower for the second moving vane, or from a water blowing pump for the second moving vane, to thereby rotate the propellers of the second moving vane. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, instead of a high-pressure turbine using high-temperature and high-pressure combustion gas or steam as a driving fluid, a turbine is configured by combining a plurality of propellers with normal-temperature normal-pressure air or normal-temperature water as a driving fluid, and the diameter and rotation of each propeller The generated thrust and torque are adjusted according to the number, number of blades and rotation method, and a large thrust is generated with a small amount of power. The propulsion power or thrust of the aircraft or ship is received by the propeller wind turbine or turbine, and converted into torque to generate power TECHNICAL FIELD The present invention relates to a low-pressure turbine driving method used as motive power and a low-pressure turbine driving apparatus.

  Commonly used turbines are wind turbines that are low pressure turbines, and high pressure turbines such as steam turbines and gas turbines. Of these, wind turbines use natural wind as the driving fluid, so heat efficiency is good, but the operation rate is low, and because of the reverse wake generated by the rotation of the propeller, multiple wind turbines cannot be connected by the rotating shaft, and wind energy is saved. In order to convert to a large torque, the rotation speed must be low and the diameter must be large, and the scale becomes large. On the other hand, a high-pressure turbine has a smaller scale than a wind turbine by connecting multiple rotor blades and speeding up rotation by correcting the rotating direction of the reverse wake generated by the rotation of rotor blades, which are rotor blades. It generates a large torque, but it is mechanically complex, and the driving fluid such as steam or combustion gas has to be at high temperature and high pressure. The heat efficiency is low because most of the heat is discharged outside the turbine.

  Therefore, it is desirable for the turbine to have a high-pressure turbine operating rate, equipment scale, and wind turbine thermal efficiency, and to suppress the generation of carbon dioxide in order to prevent global warming. Turbines that use are desired. Under such circumstances, techniques for obtaining a large thrust have been disclosed so far.

  For example, in Patent Document 1, as a “double propeller device”, two propellers are attached to a propeller shaft protruding from a hull, and a fin is attached to a propeller boss support material between a front propeller and a rear propeller, The rotation direction of the reverse wake generated by the rotation of the front propeller is corrected by the fin, and the thrust is increased in accordance with the rotation direction of the rear propeller.

  In Patent Document 2, as a “double propeller propulsion device”, a rotary shaft that transmits power from a power unit is a double shaft having a front propeller rotary shaft as an outer shaft and a rear propeller rotary shaft as an inner shaft. The thrust is increased by rotating the rear propeller in accordance with the direction of the reverse propeller generated by the rotation of the front propeller.

Japanese Patent Publication No. 11-034981 Japanese Patent Publication No. 7-33084

  However, in the invention disclosed in the above-mentioned Patent Document 1, the front propeller and the rear propeller are connected by the same rotating shaft, and it is difficult to adjust the diameter and rotational speed of the propeller, and the density and viscosity are high. High efficiency cannot be obtained by the method of correcting the flow of water, which is a compressible fluid, with fins, and it is difficult to obtain a large thrust.

  In the invention disclosed in Patent Document 2 described above, in the method in which the rotation shaft is a double shaft and the rotation of the rear propeller is adjusted to the reverse flow by the rotation of the front propeller, the power transmission mechanism such as a reverse gear or a shaft coupling is used. Or, it becomes a complicated device such as providing two driving devices.

  In the present invention, the driving fluid is air or water, and in order to obtain a large thrust by the rotation of the plurality of propellers, the arrangement of the plurality of propellers suitable for the planned thrust and the adjustment and thrust of the propeller aperture, the number of rotations, the number of blades are performed in parallel. Therefore, it is an object of the present invention to select a driving device having a simple mechanism that has a small propeller driving power corresponding to the changing torque and can obtain a large thrust.

  The method for driving a low-pressure turbine according to claim 1 of the present invention includes a step of sucking and accelerating air or water as a fluid by driving and rotating a propeller of a first moving blade, and a blade section of the propeller is rotated. It consists of a plurality of blades that are asymmetrical spirals around the axis, and the fluid inflow angle with respect to the blade cross section changes with the phase due to rotation, and it rotates with the accelerated fluid from the front, and the fluid is at normal temperature and normal pressure For air or water at normal temperature, the thrust generated by the propeller is set by the propeller diameter, number of revolutions, and number of blades. To create a large thrust, the propeller diameter must be increased and the number of revolutions and number of blades increased. It is known that the first blade propellers arranged in series at intervals in the direction of fluid flow accelerated by the first blade propeller are known. The step of rotating the propeller by injecting the fluid accelerated by the propeller of the first rotor blade into the propeller of the second rotor blade having a larger diameter, and driving and rotating the propeller of the second rotor blade in accordance with this rotation direction Thus, the process further includes a step of sucking and accelerating the fluid, and has a function of obtaining a large thrust.

  In the low-pressure turbine driving method according to claim 2, when the propeller is rotated by applying power from the rotating shaft, the lift generated at right angles to the angle at which the fluid flows into the blade cross section constituting the propeller is Power is applied to rotate the propeller so that it is greater than the drag generated on the extension of the incoming angle. This is equivalent to blowing the fluid at an angle at which the fluid flows into the blade cross section constituting the propeller, and the propeller is rotated by the fluid blowing at this angle, and the thrust and torque generation distribution on the blade of the propeller Is high near the tip, and by blowing near the tip of the blade where the thrust and torque generation distribution is locally high, the drag is reduced and less than when the propeller is powered from the rotating shaft and the fluid is swallowed and rotated. It is experimentally confirmed that the propeller is rotated by power. Accordingly, the propeller of the first blade and the propeller of the second blade generate thrust and torque locally at an angle at which air or water as a fluid flows into the blade cross section constituting the propeller by rotation of the propeller. It has a step of rotating the propeller by blowing a fluid near the tip of the propeller with high distribution, and compared with the case where the propeller is rotated by applying power from the rotating shaft, the power and multiple propellers are made independent and connected by the rotating shaft. It has the effect | action made to rotate by the simple mechanism which does not make it into a double rotating shaft.

  A driving apparatus for a low-pressure turbine according to a third aspect captures the driving method for the low-pressure turbine according to the first aspect as a driving apparatus, and is accelerated by the propeller of the first moving blade and the propeller of the first moving blade. A propeller of a second blade having a larger diameter than the propeller of the first blade disposed in series in the flow direction of the generated fluid, and a thrust generated by the rotation of the propeller of the first blade device The propeller of the second moving blade is rotated, and the direction of this rotation is adjusted to further drive and rotate the propeller of the second moving blade to suck and accelerate the fluid, thereby obtaining a large thrust. The operation of the described invention is the same as that of the first invention.

  The drive device for the low pressure turbine according to claim 4 is obtained by capturing the drive method for the low pressure turbine according to claim 2 as a drive device, and the propeller of the first moving blade and the propeller of the second moving blade are: By means of rotating the propeller by blowing fluid into the vicinity of the propeller tip where the distribution of thrust and torque is locally high at an angle at which air or water as fluid flows into the blade cross section constituting the propeller by rotation of the propeller The propeller is rotated by power and a simple mechanism, and the operation of the present invention is the same as that of the second invention.

  According to a fifth aspect of the present invention, there is provided the driving apparatus for the low-pressure turbine by providing a cylindrical outer shell having the same diameter as the second moving blade between the first moving blade and the second moving blade. The moving blade is fixed by a support member provided at equal intervals so that the fluid sucked by the second moving blade does not drift, and the flow direction and flow velocity of the surrounding fluid of the low-pressure turbine drive device change, so that the first moving blade The fluid accelerated by the propeller and the fluid sucked by the propeller of the second blade are prevented from drifting.

  In the present invention, the propeller of the first rotor blade is blown and rotated near the tip of the propeller where the thrust and torque generation distribution is locally high at an angle at which air or water as a driving fluid flows into the blade cross section constituting the propeller. , Suck up and accelerate the surrounding fluid. The accelerated fluid is sprayed and rotated on a propeller of a second blade having a larger diameter than the propeller of the first blade that is spaced in series in the flow direction. A method for driving a low-pressure turbine that obtains a large thrust by rotating the propeller of the second blade in accordance with this rotational direction in the same manner as the propeller of the first blade and further sucking and accelerating the fluid, and the low-pressure turbine drive Device.

When using this method, the thrust and torque generated by the rotation of the propeller is restricted by the wind speed in the air that is a compressible fluid, and the wind speed due to the propeller diameter and air volume is limited to the sound speed unless a special device such as a Laval nozzle is used. In addition, water, which is an incompressible fluid, is restricted by static pressure due to the propeller diameter and flow rate. When the driving fluid is air under this restriction, the relationship between the thrust and torque generated by the rotation of the propeller and the diameter of the propeller, the number of rotations, and the number of blades is constant and the propeller diameter is n. if double thrust and torque n ⁴ times, also, the thrust is n ² times, torque n ³ times, the propeller diameter and the rotational speed is constant if n times the rotational speed and the propeller diameter and number of blades is constant If the number of blades is increased by n times, the thrust and torque generated will be around n times, and even when the driving fluid is water, the relationship between the thrust and torque generated by the rotation of the propeller, the propeller diameter, the number of rotations, and the number of blades is the same. To change.

  In the relationship between the torque that changes in parallel with the thrust and the power for propeller rotation, fluid is blown at an angle at which air or water, which is a fluid, flows into the blade cross section near the tip of the propeller, and the propeller is rotated. The fluid sucked and accelerated by the propeller of the second blade is sprayed and rotated on the propeller of the second moving blade having a diameter larger than that of the first moving blade, and the propeller of the second moving blade is rotated in accordance with this rotation direction. The power required for the rotation of the propeller is reduced by rotating it in the same manner as the propeller.

  The power that blows the fluid at an angle at which the fluid flows into the blade cross section near the tip of the propeller and rotates the propeller is the power required to operate the blower for air and the pump for water. The operating power of the blower or pump, which is the fluid blowing means, depends on the blowing amount and blowing pressure, but the angle at which the fluid flows into the blade cross section is also the angle at which the propeller pours the fluid. The electric power is set by the blowing amount corresponding to the propeller diameter, and the blowing pressure is set by the blowing amount and the blowing port diameter. The diameter of the propeller of the second blade is larger than the diameter of the propeller of the first blade and generates a larger torque. The fluid accelerated by the propeller converges and diffuses. Therefore, the propeller interval was adjusted so that the diffusion region of the fluid accelerated by the propeller of the first moving blade matched the range according to the diameter of the propeller of the second moving blade, and accelerated by the propeller of the first moving blade. When the propeller of the second blade is rotated by the fluid, the power required for the blower or pump for rotating the propeller of the second blade is further reduced.

  The fluid is blown at an angle at which the fluid flows into the blade cross section near the tip of the first blade propeller, the propeller is rotated, and the fluid accelerated by the first blade propeller has a diameter larger than that of the first blade propeller. The second rotor blade propeller is blown and rotated in the same direction as the propeller of the first rotor blade device in accordance with the direction of rotation. The individual propellers of the rotor blade and the second rotor blade are independent propellers that are not connected by a rotating shaft, and the complex power transmission device of a complex high-pressure turbine or a counter-rotating propeller used for propulsion engines such as aircraft and ships The mechanism is simpler than that of the driving device.

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

  Hereinafter, a low-pressure turbine driving method according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a configuration diagram of a low-pressure turbine driving method according to an embodiment of the present invention. In FIG. 1, a low-pressure turbine driving method includes a first moving blade 1, a first moving blade support 2, a first moving blade propeller 3, a fluid blowing nozzle 4 to the first moving blade propeller, and a cylindrical shape. Fluid injection into the outer shell 5, the second moving blade 6, the second moving blade outer shell 7, the second moving blade propeller 8, the second moving blade support 9, and the second moving blade propeller Nozzle 10, first moving blade air blowing blower 11, first moving blade water blowing pump 12, second moving blade air blowing blower 13, second moving blade water blowing pump 14 Consists of. The first moving blade 1 is fixed by a support member 2 of the first moving blade provided at equal intervals with the cylindrical outer shell 5, and air is blown into the first moving blade provided outside the cylindrical outer shell 5. The angle at which the fluid flows from the blower 11 for water or the pump 12 for water blowing into the blade cross section near the tip of the propeller 3 of the first blade through the air or water as the fluid through the support member 2 of the first blade The fluid is blown into the propeller of the first blade by the fluid blowing nozzle 4 to rotate the propeller.

  The fluid is sucked and accelerated by the rotation of the propeller 3 of the first rotor blade, and after converging while rotating, it diffuses. The diffusion region of the fluid is in a range corresponding to the diameter of the propeller 8 of the second blade fixed to the second blade outer shell 7 by the second blade support material 9. The distance between the blade propeller 4 is adjusted, and the second blade propeller 8 is rotated. In accordance with the direction of this rotation, the second moving blade is supplied from the air blowing blower 13 of the second moving blade provided on the outside of the second moving blade outer shell 7 or the water blowing pump 14 of the second moving blade. The propeller 8 of the second rotor blade is blown into the propeller 8 of the second rotor blade by blowing air or water at an angle at which the fluid flows into the blade cross section near the tip of the propeller 8 of the second rotor blade, and the propeller is rotated. . The fluid is sucked and accelerated by the rotation of the propeller 8 of the second moving blade, and the cylindrical outer shell 5 provided with the fluid sucked along with the acceleration between the first moving blade 1 and the second moving blade 6. The first moving blade 1 and the second moving blade 6 are sucked from the space due to the difference in the diameter of the second moving blade 6 to obtain a large thrust.

  Hereinafter, a method for injecting fluid into a propeller in a low-pressure turbine driving method according to an embodiment of the present invention will be described with reference to FIG. FIG. 2 is a configuration diagram of a fluid blowing method to a propeller in a low-pressure turbine driving method according to an embodiment of the present invention. (A) is an air blowing blower (b) is an example of a water blowing pump.

  In FIG. 2, the method of injecting fluid into the propeller includes a blade 15, a blade cross section 16, a fluid injecting nozzle 17, an air injecting blower 18, a water injecting pump 19, and a rotating shaft 20 that constitute the propeller. The propeller is constituted by a plurality of blades 15 having the same shape, and each blade cross section 16 is arranged in an asymmetrical spiral shape around the rotating shaft 20. The fluid blowing nozzles 17 correspond to this arrangement, and a plurality of fluid blowing nozzles 17 are arranged facing each other according to the angle at which the fluid flows into each blade cross section. When the fluid is blown at an angle at which the fluid flows into the blade cross section and the propeller is rotated, the angle at which the fluid flows into each blade 15 is an angle set in the blade airfoil. Therefore, the fluid blowing nozzle 17 is fixed at an angle set according to each airfoil, and the rotational speed is adjusted by the flow rate. The air blowing blower 18 or the water blowing pump 19 is arranged according to the arrangement of the fluid blowing nozzle 17. If the fluid is air, the air blowing blower 18 is used. If the fluid is water, the air blowing pump 19 is used. It feeds into the fluid blowing nozzle 3.

  In the above description, in the driving method of the low-pressure turbine according to the present embodiment, a large thrust can be obtained with a small amount of power, both the thermal efficiency and the operation rate as the turbine are high, no carbon dioxide is generated, and the mechanical A simple low-pressure turbine

  Next, a driving apparatus for a low-pressure turbine according to an embodiment of the present invention will be described with reference to FIG. In the present embodiment, the driving method using the low-pressure turbine described above is regarded as a driving device. When the method invention has already been described with reference to FIG. 1, it is considered that the method has also been substantially described, but for the sake of easy understanding, the method will be described again with reference to the flowchart.

  FIG. 3 is a flowchart of the low-pressure turbine drive apparatus according to the embodiment of the present invention. In FIG. 2, step S-1 is an angle at which the fluid flows into the blade cross section near the tip of the first rotor blade propeller, blows air or water as the fluid, rotates the propeller, sucks the surrounding fluid, and accelerates. It is means to do. In step S-2, the fluid accelerated in step S-1 is sprayed and rotated on the propeller of the second blade, and the angle at which the fluid flows into the blade cross section near the tip of the propeller of the second blade in the rotation direction. This is a means for generating a large thrust by blowing the fluid and rotating the propeller to further suck and accelerate the fluid. The above-described low-pressure turbine drive apparatus according to the present embodiment can also achieve the same effects as the low-pressure turbine drive method described above.

It is a block diagram of the drive method of the low pressure turbine which concerns on embodiment of this invention. It is a block diagram about the fluid blowing method to the propeller among the low-pressure turbine drive methods which concern on embodiment of this invention. It is a flowchart of the drive device of the low pressure turbine concerning the embodiment of the present invention.

Explanation of symbols

1: First blade
2: Support material for the first blade
3: Propeller of the first blade
4: Fluid injection nozzle to the propeller of the first blade
5: Cylindrical outer shell
6: Second blade
7: Second bucket outer shell
8: Second blade propeller
9: Support material for second blade
10: Fluid injection nozzle to the propeller of the second blade
11: Air blower for the first rotor blade
12: Pump for water blowing of the first moving blade
13: Air blower for the second rotor blade
14: Pump for water blowing of the second moving blade
15: Blade
16: Blade cross section
17: Fluid injection nozzle
18: Air blower
19: Pump for water blowing
20: Rotating shaft

Claims (5)

  A step of driving and rotating the propeller of the first blade to suck and accelerate the fluid, and blowing the accelerated fluid into the propeller of the second blade larger than the diameter of the propeller of the first blade. A step of rotating the propeller of the moving blade of the first blade and a step of driving and rotating the propeller of the second moving blade in accordance with the rotation direction to further suck and accelerate the fluid to obtain a large thrust. A low-pressure turbine driving method.   The propeller tip of the first rotor blade and the propeller of the second rotor blade has a propeller tip having a locally high thrust and torque generation distribution at an angle at which fluid flows into a blade cross section constituting the propeller by rotation of the propeller. 2. The method of driving a low-pressure turbine according to claim 1, further comprising a step of rotating the propeller by blowing a fluid in the vicinity thereof.   The propeller of the first moving blade and the propeller of the first moving blade are arranged at intervals in series in the direction of fluid flow from the propeller of the first moving blade, and the propeller of the second moving blade has a large diameter by the propeller. A low-pressure turbine drive.   The propeller of the first moving blade and the propeller of the second moving blade are at an angle at which fluid flows into the blade cross section constituting the propeller by the rotation of the propeller and in the vicinity of the propeller tip where the generation distribution of thrust and torque is locally high 4. The low-pressure turbine drive apparatus according to claim 3, further comprising means for injecting fluid into the pipe.   5. The low-pressure turbine drive device according to claim 3, wherein a cylindrical outer shell having the same diameter as that of the second moving blade is provided between the first moving blade and the second moving blade. .

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