JP4387725B2 - Multistage wind power generator - Google Patents

Description

  The present invention relates to a wind turbine generator, and more particularly to a multi-stage wind turbine generator incorporating a plurality of wind turbines.

  Wind turbine generators are roughly classified into wind turbine generators that employ horizontal axis wind turbines and wind turbine generators that employ vertical axis wind turbines. Among them, a wind turbine generator employing a vertical axis wind turbine can be manufactured in a small size with a simple structure, and is therefore manufactured and generally sold for small power supply of several tens of watts to several kW.

  In general, in a wind turbine generator employing this vertical axis wind turbine, one wind turbine having an outer diameter (diameter × height) corresponding to each rated output and one generator are attached to one strut. I am doing so.

  However, it is difficult to manufacture and store many types of wind turbines with different specifications such as outer diameter (diameter x height) due to demands for productivity, manufacturing cost, and number of parts. The types of rated outputs are often limited to several types such as 100 W, 200 W, 400 W, and 1000 W, for example.

  However, the rated output required by the user of the wind turbine generator is the power consumption required by various electric devices such as a lamp, a display, a clock, and a transceiver that are powered by the wind turbine generator. Therefore, in order to satisfy the power consumption required by the user, it is necessary to install a plurality of wind turbine generators having the same or different rated outputs.

  As described above, when a plurality of wind turbine generators are installed, it is necessary for the user not only to increase the installation cost of the wind turbine generator as a whole, but also to ensure a wide installation location. Furthermore, there is a concern that the maintenance labor and cost of the wind turbine generator will increase. Moreover, the wiring which connects each wind power generator and electric equipment becomes complicated.

  In Patent Document 1, a plurality of impellers rotating in opposite directions are provided, one coil of the generator is rotated in one direction by one impeller, and the other coil of the generator is rotated by the other impeller. A technique for increasing the output of the generator by increasing the relative rotational speed between the coils by rotating the coil in the other direction is disclosed.

However, the wind power generator disclosed in Patent Document 1 is also operated with one type of rated output determined by the outer diameter (diameter × height) of the impeller, etc., thus eliminating the various problems described above. Not what you want.
JP-A 63-5177

  Thus, in the conventional wind power generator, in order to satisfy the power consumption required by the user, it is necessary to install a plurality of wind power generators.

  The present invention has been made in view of such circumstances, it is not necessary to install a plurality of wind power generators, can achieve a rated output that satisfies the power consumption required by the user with a simple configuration, and It aims at providing the multistage wind power generator which can reduce a user's economical burden significantly.

  In order to solve the above problems, in the multi-stage wind turbine generator of the present invention, the common vertical rotating shaft and the common vertical rotating shaft are attached to different axial positions, and a part of the common vertical rotating shaft and the common vertical rotating shaft are attached. A plurality of vertical straight blade wind turbines having the same rated output composed of a plurality of vertical straight blades parallel to the rotating shaft, and a generator for converting the rotational energy of the common vertical rotating shaft into electric energy.

  In the multistage wind turbine generator configured as described above, a plurality of vertical straight blade wind turbines having the same rated output are arranged in multiple stages in the vertical direction. A plurality of vertical straight blade wind turbines arranged in multiple stages in the vertical direction are connected by a common vertical rotation shaft, and a generator is attached to the common vertical rotation shaft.

  Therefore, the rated output of the entire multi-stage wind turbine generator is a value obtained by adding the rated output determined by, for example, the outer diameter (diameter × height) of each vertical straight blade wind turbine. A multistage wind power generator having a desired rated output can be easily realized by appropriately selecting the rated output of each vertical straight blade wind turbine.

  Furthermore, since it is not necessary to install a plurality of wind power generators, it is possible to install a multistage wind power generator having a desired rated output with a minimum required installation area.

  Further, in the multistage wind turbine generator according to another invention, the common vertical rotating shaft and the common vertical rotating shaft are attached to different axial positions, and a part of the common vertical rotating shaft and the common vertical rotating shaft are inclined. A plurality of slant straight blade wind turbines having different rated outputs composed of a plurality of slant straight blades, and a generator for converting the rotational energy of the common vertical rotating shaft into electric energy.

  In the multi-stage wind turbine generator configured as described above, the rated output of the multi-stage wind turbine generator as a whole is a value obtained by adding the rated output determined by, for example, the outer diameter dimension (diameter x height) of each oblique straight blade wind turbine. Therefore, it is possible to achieve substantially the same operational effects as the multistage wind power generator of the invention described above.

In another invention, the rated outputs of a plurality of vertical straight blade wind turbines or a plurality of oblique straight blade wind turbines arranged in multiple stages in the vertical direction in the multi-stage wind power generator of each of the above-described inventions are set to different values. Has been.
Thus, by setting each rated output to a value different from each other, it is possible to select and set the rated output of the entire multistage wind power generator in a wider range.

  Further, in the multistage wind power generator of another invention, a first vertical straight blade wind turbine composed of a first vertical rotation shaft and a plurality of vertical straight blades parallel to the first vertical rotation shaft, The first generator for converting the rotational energy of the first vertical rotating shaft into electrical energy, the second vertical rotating shaft sharing an axis with respect to the first vertical rotating shaft, and the second vertical rotation A plurality of vertical straight blades parallel to the shaft and having different rated outputs with respect to the first vertical straight blade wind turbine; And a second generator for converting energy.

  In the multi-stage wind turbine generator configured in this way, the rated outputs determined by the outer diameter (diameter × height), etc. of the first and second vertical straight blade wind turbines arranged in multiple stages in the vertical direction are mutually It is set to a different value. Accordingly, each vertical straight blade wind turbine basically rotates at different rotational speeds with respect to the same wind force. A dedicated generator is provided for each vertical straight blade wind turbine. Therefore, when necessary, electric power can be taken out from only one of the generators. Of course, the total power can be taken from both generators.

  In addition, it is also possible to replace the first and second vertical straight blade wind turbines in the invention described above with oblique straight blade wind turbines.

  According to another invention, in the multistage wind turbine generator described above, the first vertical straight blade wind turbine and the second vertical straight blade wind turbine have different rotation directions. Furthermore, when the rotational speed of any one of the first vertical straight blade wind turbine and the second vertical straight blade wind turbine exceeds a specified speed, the first vertical rotational shaft and the second vertical wind turbine A clutch mechanism that connects the vertical rotation shaft is provided.

  In the multi-stage wind turbine generator configured as described above, when the rotation speed of any one of the vertical straight blade wind turbines exceeds the specified speed, the first vertical rotation shaft and the second vertical rotation shaft are connected. Therefore, the rotation of the vertical straight wind turbine with the larger rated output is braked (brake) by the reverse rotational force of the vertical straight wind turbine with the smaller rated output, and the rotation speed of the vertical straight blade wind turbine is below the specified speed. The probability of being lowered is increased. Therefore, the allowable speed range of the wind as the whole multistage wind power generator can be expanded.

  In addition, it is also possible to replace the first and second vertical straight blade wind turbines in the invention described above with oblique straight blade wind turbines.

  In the multi-stage wind turbine generator of the present invention, it is not necessary to install a plurality of wind turbine generators, it is possible to realize a rated output that satisfies the power consumption required by the user with a simple configuration, and to reduce the economic burden on the user. Can be greatly reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic configuration diagram of a multi-stage wind power generator according to a first embodiment of the present invention, FIG. 1 (a) is an overall view, and FIG. 1 (b) is each vertical straight blade constituting the multi-stage wind power generator. FIG. 1C is a perspective view showing a schematic configuration of the windmills 3a and 3b, and FIG. 1C is a schematic cross-sectional view taken along the line AA ′ of FIG.

  The stator 2a of the generator 2 is fixed to the upper end of the column 1 whose lower end is fixed to the ground. The lower end of the common vertical rotating shaft 4 of the upper vertical straight blade wind turbine 3a and the lower vertical straight blade wind turbine 3b is fixed to the upper surface of the rotor 2b of the generator 2. Therefore, when each vertical straight blade wind turbine 3a, 3b rotates, the generator 2 generates electric power according to the rotation speed.

Each vertical straight wing windmill 3a that vertically arranged in multiple stages, 3b has an outer diameter rated output W _A defined by (diameter × height) or the like, is W _B are set equal to each other. In each of the vertical straight blade wind turbines 3a and 3b, three vertical straight blades 6 are attached to three locations on the circumference of the common vertical rotating shaft 4 via support arms 5a and 5b. Each vertical straight blade 6 is maintained in parallel to the common vertical rotation axis 4 by the upper support arm 5a and the lower support arm 5b. As shown in FIG. 1C, the vertical straight blade 6 has a cross-sectional shape that rotates clockwise with respect to the horizontal wind 8 around the common vertical rotation shaft 4 as viewed from above.

  In each vertical straight blade wind turbine 3a, 3b of the multi-stage wind turbine generator of the first embodiment configured as described above, support arms 5a, 5b are attached to a common vertical rotating shaft 4 whose lower end is fixed to the rotor 2b of the generator 2. The three vertical straight blades 6 parallel to the common vertical rotating shaft 4 are attached via the. Therefore, the horizontal wind 8 in any direction within the horizontal direction rotates about the common vertical rotation shaft 4 using the lift generated in the vertical straight blade 6.

Furthermore, the rated output W _S obtained from the generator 2 as a whole multistage wind turbine generator, each of the vertical straight wing windmill 3a, rated output determined by the outer diameter of 3b (diameter × height), etc. W _A, a W _B The added value. Here, the diameter constituting the outer diameter dimension is twice the length of the support arms 5 a and 5 b, and the height is the vertical length of the vertical straight blade 6.

Accordingly, the desired output can be easily selected by appropriately selecting the rated output W _A (= W _B ) determined by the outer diameter (diameter × height) of the individual vertical straight wind turbines 3a, 3b incorporated in the multistage wind turbine generator. the multi-stage wind turbine generator having a rated output W _S of the can be realized. In addition, since the number of types of rated output W _A (= W _B ) determined by the outer diameter dimensions (diameter × height) of the vertical straight blade wind turbines 3a, 3b to be prepared in advance can be reduced, the productivity can be improved and the manufacturing cost can be reduced. Reduction and the number of parts can be suppressed.

Further, since the user does not need to install a plurality of wind turbine generator only one vertical straight blade wind turbine in order to obtain the rated output W _S is incorporated the desired, desired rated at minimum footprint the multi-stage wind turbine generator having an output W _S can be installed. Moreover, the installation cost of the wind power generator as a whole can be reduced for the user. Furthermore, it is possible to reduce the labor and cost of maintaining the wind power generator.

(Second Embodiment)
FIG. 2 is an overall view of a multistage wind power generator according to the second embodiment of the present invention. The same parts as those in the multi-stage wind power generator according to the first embodiment shown in FIG.

In the multistage wind turbine generator of the second embodiment, the lower end of the common vertical rotating shaft 4 of the upper vertical straight blade wind turbine 3c and the lower vertical straight blade wind turbine 3b is fixed to the upper surface of the generator 2. The rated output W _C determined by the outer diameter dimension (diameter × height) of the vertical straight blade wind turbine 3c arranged in the upper stage is the outer diameter dimension (diameter × height) of the vertical straight blade wind turbine 3b arranged in the lower stage. ) Etc., and is set to be larger than the rated output W _B determined. The rotation directions of the vertical straight blade wind turbines 3c and 3b are set in the same direction as in the multistage wind turbine generator of the first embodiment.

Also in the multi-stage wind turbine generator of the second embodiment thus configured, the rated output W _S obtained from the generator 2 as a whole multistage wind turbine generator, each of the vertical straight wing windmill 3c, 3b of the outer diameter ( It is a value obtained by adding the rated outputs W _C and W _B determined by (diameter × height) and the like. Accordingly, it is possible to achieve substantially the same operational effects as the multistage wind power generator of the first embodiment.

Further, the second in a multistage wind turbine generator embodiment, each vertical straight wing windmill 3c, 3b of the rated output W _C, W _B, which are set to different values, the power generation of the multi-stage wind turbine generator The rated output W _S obtained from the machine 2 can be selected and set in a wider range.

(Third embodiment)
FIG. 3 is a schematic configuration diagram of a multi-stage wind power generator according to a third embodiment of the present invention. FIG. 3 (a) is an overall view, and FIG. 3 (b) is an oblique straight straight line constituting this multi-stage wind power generator. FIG. 3C is a perspective view showing a schematic configuration of the blade wind turbines 7a and 7b, and FIG. 3C is a schematic cross-sectional view taken along the line AA ′ of FIG. The same parts as those in the multi-stage wind power generator according to the first embodiment shown in FIG.

  In the multi-stage wind turbine generator of the third embodiment, the lower end of the common vertical rotating shaft 4 of the upper oblique straight blade wind turbine 7a and the lower oblique straight blade wind turbine 7b is fixed to the upper surface of the generator 2.

Each oblique straight blades wind turbine 7a which vertically arranged in multiple stages, 7b has an outer diameter rated output W _A defined by (diameter × height) or the like, is W _B are set equal to each other. In each of the slant straight blade wind turbines 7a and 7b, three slant straight blades 9 are attached to three places on the circumference of the common vertical rotating shaft 4 via support arms 5a and 5b. Each oblique straight blade 9 is maintained in an oblique direction with respect to the common vertical rotation axis 4 by the upper support arm 5a and the lower support arm 5b. As shown in FIG. 3C, the slant straight blade 6 has a cross-sectional shape that rotates clockwise around the common vertical rotation axis 4 with respect to the horizontal wind 8 as viewed from above.

  Also in each of the oblique straight blade wind turbines 7a and 7b of the multi-stage wind turbine generator of the third embodiment configured as described above, the lift generated on the oblique straight straight blade 9 with respect to the horizontal wind 8 in any direction within the horizontal direction. To rotate around the common vertical rotation axis 4.

The rated output W _S obtained from the generator 2 as a whole multistage wind turbine generator, individual diagonal straight blade wind turbine 7a, rated output determined by the outer diameter of 7b (diameter × height), etc. W _A, a W _B The added value. Accordingly, it is possible to achieve substantially the same operational effects as the multistage wind power generator of the first embodiment shown in FIG.

(Fourth embodiment)
FIG. 4 is an overall view of a multistage wind power generator according to a fourth embodiment of the present invention. The same parts as those in the multi-stage wind power generator according to the third embodiment shown in FIG.

  In the multistage wind turbine generator of the fourth embodiment, the lower end of the common vertical rotating shaft 4 of the upper oblique straight blade wind turbine 7d and the lower oblique straight blade wind turbine 7e is fixed to the upper surface of the generator 2. In each of the slant straight blades 7d and 7e arranged in multiple stages in the vertical direction, the length of the upper support arm 5a that supports each slant straight blade 9 is set shorter than the length of the lower support arm 5b. Yes.

Therefore, each of the slant straight blade wind turbines 7a and 7b in the multistage wind turbine generator of the third embodiment shown in FIG. In each of the slant straight blade wind turbines 7d and 7e arranged in multiple stages in the vertical direction, the rated outputs W _D and W _E determined by the outer diameter (diameter × height) and the like are set to be equal to each other.

Also in the multi-stage wind turbine generator of the fourth embodiment configured as described above, the rated output W _S obtained from the generator 2 as a whole multi-stage wind turbine generator is the outer diameter dimension of each of the oblique straight blade wind turbines 7d and 7e ( It is a value obtained by adding the rated outputs W _D and W _E determined by (diameter × height) and the like. Accordingly, it is possible to achieve substantially the same operational effects as the multistage wind power generator of the third embodiment.

(Fifth embodiment)
FIG. 5 is an overall view of a multistage wind power generator according to a fifth embodiment of the present invention. The same parts as those in the multi-stage wind power generator according to the third embodiment shown in FIG.

In the multistage wind turbine generator of the fifth embodiment, the lower end of the common vertical rotating shaft 4 of the upper oblique straight blade wind turbine 7c and the lower oblique straight blade wind turbine 7b is fixed to the upper surface of the generator 2. The rated output W _C determined by the outer diameter dimension (diameter × height) of the slant straight blade wind turbine 7c disposed in the upper stage is the outer diameter dimension (diameter × height) of the slant straight blade wind turbine 7b disposed in the lower stage. ) Etc., and is set larger than the rated output W _B determined by (W _C > W _B ). The rotation directions of the slant straight blade wind turbines 7c and 7b are set in the same direction as in the multi-stage wind turbine generator of the third embodiment.

Also in the multi-stage wind turbine generator of the fifth embodiment configured as described above, the rated output W _S obtained from the generator 2 as the entire multi-stage wind turbine generator is the outer diameter dimension of the individual slant straight blade wind turbines 7c and 7b ( It is a value obtained by adding the rated outputs W _C and W _B determined by (diameter × height) and the like. Accordingly, it is possible to achieve substantially the same operational effects as the multistage wind power generator of the third embodiment.

Further, the fifth in the multi-stage wind turbine generator embodiment, each of the oblique straight wing windmill 7c, 7b of the rated output W _C, W _B, which are set to different values, the power generation of the multi-stage wind turbine generator The rated output W _S obtained from the machine 2 can be selected and set in a wider range.

  FIG. 6 is a diagram showing another example of combination of the slant straight blade wind turbines 7b, 7c, 7d, and 7e arranged in two stages in the vertical direction. FIG. 6A shows a multi-stage wind turbine generator in which the slant straight blades 7a and 7e having the same rated output are arranged in a drum shape, and FIG. 6B shows the slant straight blades 7d and 7b having the same rated output. A multi-stage wind power generator arranged in a barrel shape is shown, and FIG. 6C shows a multi-stage wind power generator in which slant straight blade wind turbines 7c and 7e having different rated outputs are arranged in a drum shape.

(Sixth embodiment)
FIG. 7 is a schematic configuration diagram of a multi-stage wind turbine generator according to a sixth embodiment of the present invention. FIG. 7 (a) is an overall view, and FIG. 7 (b) is an AA ′ line in FIG. 7 (a). FIG. 7C is a schematic cross-sectional view when cut, and FIG. 7C is a schematic cross-sectional view when cut along the line BB ′ in FIG. Moreover, FIG. 8 is sectional drawing of the principal part of this multistage wind power generator. The same parts as those in the multi-stage wind turbine generator according to the fifth embodiment shown in FIG.

  The lower end of the common fixed shaft 14 is fixed to the upper end of the column 1 whose lower end is fixed to the ground. As shown in FIG. 8, on the outer periphery of the common fixed shaft 14, a vertical rotation shaft 10 a serving as a first vertical rotation shaft and a vertical rotation shaft 10 a serving as a second vertical rotation shaft are provided in a vertical direction in a vertical direction. It is attached via a rotation.

  Three oblique straight blades 9 in an oblique straight blade wind turbine 7c as a first oblique straight blade wind turbine are attached to the upper vertical rotating shaft 10a via support arms 5a and 5b. As shown in FIG. 7B, the slant straight blade 9 of the slant straight blade wind turbine 7c has a cross-sectional shape that rotates clockwise with respect to the horizontal wind 8 around the vertical rotation shaft 10a. is doing.

  Three oblique straight blades 9 in an oblique straight blade wind turbine 7b as a second oblique straight blade wind turbine are attached to the lower vertical rotating shaft 10b via support arms 5a and 5b. As shown in FIG. 7C, the slant straight blade 9 of the slant straight blade wind turbine 7b has a cross-sectional shape that rotates clockwise with respect to the horizontal wind 8 around the vertical rotation shaft 10a. is doing.

The rated output W _C determined by the outer diameter dimension (diameter × height) of the slant straight blade wind turbine 7c disposed in the upper stage is the outer diameter dimension (diameter × height) of the slant straight blade wind turbine 7b disposed in the lower stage. ) Etc., and is set larger than the rated output W _B determined by (W _C > W _B ).

  A stator 12a of a generator 12 as a first generator is fixed to the upper end of the common fixed shaft 14, and is disposed on an upper stage via a support member 12c on a rotor 12b provided on the outer periphery of the stator 12a. The support arm 5a of the slant straight blade wind turbine 7c is fixed. Accordingly, when the upper oblique straight blade wind turbine 7c rotates, the upper generator 12 generates electric power according to the rotational speed.

  A stator 13a of a generator 13 as a second generator is fixed in the vicinity of the lower end of the common fixed shaft 14, and is disposed in a lower stage via a support member 13c on a rotor 12b provided on the outer periphery of the stator 13a. The support arm 5b of the slant straight blade wind turbine 7b is fixed. Therefore, when the lower oblique straight blade wind turbine 7b rotates, the lower generator 13 generates electric power according to the rotational speed.

In the multi-stage wind turbine generator of the sixth embodiment configured as described above, the vertical rotary shafts 10a and 10b of the slant straight blade wind turbines 7c and 7b arranged in a multi-stage in the vertical direction with respect to the common fixed shaft 14. Are not connected but rotate freely independently of each other. The outer diameter rated output W _C defined by (diameter × height) or the like, W _B are set to different values.

Accordingly, each of the slant straight blade wind turbines 7c and 7b basically rotates at different rotational speeds with respect to the same wind force. Dedicated generators 12 and 13 are provided for each of the slant straight blade wind turbines 7c and 7b. Thus, each generator 12 and 13 outputs the oblique straight wing windmill 7c, rating 7b output W _C, the power corresponding to W _B.

  Therefore, the user of this multi-stage wind power generator can take out electric power from only one of the generators 12 and 13 when necessary. Of course, the total electric power can be taken from both the generators 12 and 13.

  In the multi-stage wind turbine generator of the sixth embodiment shown in FIGS. 7 and 8, the slant straight blade wind turbines 7c and 7b are arranged in the vertical direction with respect to the common fixed shaft 14. Instead of the blade wind turbines 7c and 7b, the vertical straight blade wind turbines 3c and 3b in the multistage wind turbine generator of the second embodiment shown in FIG. 2 may be employed.

(Seventh embodiment)
FIG. 9 is a schematic configuration diagram of a multi-stage wind turbine generator according to a seventh embodiment of the present invention, FIG. 9A is an overall view, and FIG. 9B is an AA ′ line in FIG. FIG. 9C is a schematic cross-sectional view when cut, and FIG. 9C is a schematic cross-sectional view when cut along the line BB ′ in FIG. 9A. Moreover, FIG. 10 is sectional drawing of the principal part of this multistage wind power generator. The same parts as those of the multi-stage wind power generator according to the sixth embodiment shown in FIGS. 7 and 8 are denoted by the same reference numerals, and detailed description of the overlapping parts is omitted.

  In the multi-stage wind turbine generator of the seventh embodiment, the oblique straight blade 9 of the upper oblique straight blade wind turbine 7c is centered on the vertical rotation shaft 10a with respect to the horizontal wind 8, as shown in FIG. 9B. It has a cross-sectional shape that rotates clockwise as viewed from above. On the contrary, the slant straight blade 9 of the slant straight blade wind turbine 7b in the lower stage rotates counterclockwise as viewed from above around the vertical rotation shaft 10a with respect to the horizontal wind 8 as shown in FIG. 9C. It has a cross-sectional shape.

  Further, as shown in FIG. 10, a clutch mechanism 16 is provided between the upper vertical rotation shaft 10a and the lower vertical rotation shaft 10b. Respective tachometers for measuring the rotation speed of the upper vertical rotation shaft 10a and the rotation speed of the lower vertical rotation shaft 10b are incorporated in the generators 12 and 13, respectively. The rotational speed of one of the upper oblique straight blade wind turbine 7c and the lower oblique straight blade wind turbine is determined by the mechanical strength of the wind turbine or the specifications of the generators 12 and 13, etc. When the specified speed is exceeded, each tachometer sends a command to the clutch mechanism 16 to connect the upper vertical rotating shaft 10a and the lower vertical rotating shaft 10b to the clutch mechanism 16.

In the multi-stage wind turbine generator of the seventh embodiment configured as described above, in the normal state, the clutch mechanism 16 does not connect the upper vertical rotating shaft 10a and the lower vertical rotating shaft 10b. In this state, the oblique straight blade wind turbines 7c and 7b rotate with respect to the horizontal wind 8 at mutually different rotational speeds and in opposite directions. The generators 12 and 13 output electric power corresponding to the rated outputs W _C and W _B (W _C> W _B ) of the respective slant straight blade wind turbines 7c and 7b.

  When the rotational speed of one of the slant straight blade wind turbines 7c and 7b exceeds the specified speed, the clutch mechanism 16 connects the upper vertical rotating shaft 10a and the lower vertical rotating shaft 10b. In this case, the rotation direction of the upper slant straight blade wind turbine 7c having a large rated output is maintained, and the rotation direction of the lower slant straight blade wind turbine 7b having a small rated output is reversed. The generator 13 of the lower slant straight blade wind turbine 7b whose rotation direction is reversed automatically stops the power generation.

  That is, the rotation of the upper slant straight blade wind turbine 7c having a large rated output is braked (brake) by the reverse rotational force of the lower slant straight blade wind turbine 7b having a small rated output. The probability that the speed is reduced below the specified speed is increased. Therefore, the allowable speed range of the wind as the whole multistage wind power generator can be expanded.

  In the multi-stage wind turbine generator of the seventh embodiment shown in FIGS. 9 and 10, the slant straight blade wind turbines 7 c and 7 b are arranged in the vertical direction with respect to the common fixed shaft 14. Instead of the blade wind turbines 7c and 7b, the vertical straight blade wind turbines 3c and 3b in the multistage wind turbine generator of the second embodiment shown in FIG. 2 may be employed.

1 is a schematic configuration diagram of a multistage wind turbine generator according to a first embodiment of the present invention. The schematic block diagram of the multistage wind power generator concerning 2nd Embodiment of this invention The schematic block diagram of the multistage wind power generator concerning 3rd Embodiment of this invention. The schematic block diagram of the multistage wind power generator concerning 4th Embodiment of this invention Schematic block diagram of a multistage wind turbine generator according to a fifth embodiment of the present invention The perspective view which shows the structure of the modification of the multistage wind power generator concerning 3rd-5th embodiment of this invention. Schematic block diagram of a multistage wind turbine generator according to a sixth embodiment of the present invention Sectional drawing of the principal part of the multistage wind power generator concerning the sixth embodiment Schematic block diagram of a multistage wind turbine generator according to a sixth embodiment of the present invention Sectional drawing of the principal part of the multistage wind power generator concerning the sixth embodiment

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Column, 2, 12, 13 ... Generator, 3a, 3b, 3c ... Vertical straight blade windmill, 4 ... Common vertical rotating shaft, 5a, 5b ... Support arm, 6 ... Vertical straight blade, 7a, 7b, 7c, 7d, 7e, 7f ... slant straight blade wind turbine, 8 ... horizontal wind, 9 ... slant straight blade, 10a, 10b ... vertical rotation shaft, 14 ... common fixed shaft, 15 ... bearing, 16 ... clutch mechanism

Claims (2)

A first vertical straight blade wind turbine composed of a first vertical rotation shaft and a plurality of vertical straight blades parallel to the first vertical rotation shaft;
A first generator for converting rotational energy of the first vertical rotating shaft into electrical energy;
The first vertical rotation shaft includes a second vertical rotation shaft sharing an axis with respect to the first vertical rotation shaft, and a plurality of vertical straight blades parallel to the second vertical rotation shaft. A second vertical straight blade wind turbine having a different rated power with respect to the blade wind turbine;
A second generator for converting rotational energy of the second vertical rotating shaft into electrical energy;
With
The first vertical straight blade windmill and the second vertical straight blade windmill have different rotation directions;
When the rotational speed of any one of the first vertical straight blade wind turbine and the second vertical straight blade wind turbine exceeds a specified speed, the first vertical rotating shaft and the second vertical wind turbine A multi-stage wind power generator, characterized in that a clutch mechanism is provided for connecting the vertical rotation shaft. A first slant straight blade wind turbine comprising a first vertical rotation shaft and a plurality of slant straight blades inclined to the first vertical rotation shaft;
A first generator for converting rotational energy of the first vertical rotating shaft into electrical energy;
The first vertical rotation axis is composed of a second vertical rotation axis sharing an axis and a plurality of diagonal straight blades inclined to the second vertical rotation axis, and the first diagonal straight axis A second slanted straight blade wind turbine having different rated power for the blade wind turbine;
A second generator for converting rotational energy of the second vertical rotating shaft into electrical energy;
With
The first oblique straight blade wind turbine and the second oblique straight blade wind turbine have different rotation directions;
When the rotational speed of one of the first slant straight blade wind turbine and the second slant straight blade wind turbine exceeds a specified speed, the first vertical rotation shaft and the second A multi-stage wind power generator, characterized in that a clutch mechanism is provided for connecting the vertical rotation shaft.

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