JP2007291986A - Phase inverting cross flow type power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a novel phase inverting cross flow type power generator. <P>SOLUTION: This cross flow type power generator has rotary shafts in the direction crossing a water flow. The power generator is provided with a first type blade wheel 11 and a second type blade wheel 12 rotating in the opposite directions from each other by receiving the water flow, a first rotary shaft 21 and a second rotary shaft 22 integrated with the first and second type blade wheels 11 and 12 and rotating therewith, a plurality of magnets rotating integrally with one of the first and the second rotary shafts 21 and 22, a first power generating means including a plurality of coils rotating integrally with the other of the first and the second rotary shafts 21 and 22, one or more rotors 71 rotating integrally with the second rotary shaft 22, one or more stators 73 disposed fixedly in a device space, and a second power generating means including a plurality of coils 71A, 75A provided to the rotors 71 and stators 73. The first and the second rotary shafts 21 and 22 are supported without bearings, and part of electricity generated by the first power generating means and the second generating means becomes electricity for the supporting without bearings. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a phase inversion crossflow type power generation device, and more particularly to a phase inversion crossflow type power generation device in which power generation means and an impeller are integrated.

Hydropower and wind power generation, which convert hydropower and wind energy into electrical energy, is a power generation method that does not consume global resources and does not involve environmental pollution. It is being recognized.
In particular, simple power generators that can be easily installed in rivers and waterways with a head and using water flow, or installed in the sea and using tidal currents to generate relatively small amounts of power, are used for leisure activities such as camping, It is getting attention from the aspect of securing the lifeline at the time of disaster.

  Such simple power generators can be broadly divided into an “axial flow type” in which water flows in the direction of the rotor (rotor) rotation axis and a “cross flow type” in which the rotation axis of the rotor is installed in a direction intersecting the flow. And divided.

  An axial flow type simple power generator is disclosed in Patent Document 1, for example.

  A cross-flow type simple power generator is disclosed in Patent Document 2, for example.

  The power generation by these simple power generators is based on the relative displacement between a magnet provided on the stator (stator) and a magnet fixed on the rotor by rotating the impeller by water flow. This is done by inducing a voltage in the coil, but the electromotive force induced in the coil is proportional to the "time rate of change of magnetic flux across the coil", and this rate of change is proportional to the relative speed between the magnet and the coil. In view of the above, Non-Patent Document 1 reports an “axial-flow generator” that increases the electromotive force by rotating a stator and a rotor with coils fixed in “opposite directions”.

  Patent Document 3 discloses a “bearingless” generator that does not use a bearing to rotate the rotor relative to the stator.

JP 2001-248532 A JP2003-120499A JP2002-315258 Proceedings of the Japan Opportunity Society Fluid Engineering Division Lecture Summary Page 608 “Development of Phase Inverted Hydroelectric Generators” (2003. 9.11-20)

  This invention makes it a subject to implement | achieve the novel phase inversion crossflow type power generator which is not in the past.

  The phase inversion crossflow type power generator of the present invention is a “crossflow type power generator having a rotating shaft in a direction crossing a water flow”, and includes a first type impeller, a second type impeller, a first rotating shaft, 2 rotation shafts, first liquid introduction means, second liquid introduction means, first power generation means, second power generation means, fixing means, first bearingless support means, second bearingless support means, bearing means, control means (Claim 1).

The “first type impeller” is an impeller that rotates in a first direction in response to a water flow.
The “second type impeller” is a seed wing that rotates in a “second direction opposite to the first direction” in response to a water flow. Each of the first-type impeller and the second-type impeller can be configured as one or more impellers. For example, both type 1 and type 2 impellers can be configured by a single impeller, but both can be configured by a plurality of (same or different number) impellers, one of which is a single It is also possible to configure with an impeller and the other with a plurality of impellers. In any case, the one or more impellers constituting the first type impeller rotate in the same direction, and the one or more impellers constituting the second type impeller are the rotation direction of the first type impeller. Rotate in the opposite direction.

  The “first rotating shaft” is coaxial with the first and second type impellers, and is engaged with the first type impeller and rotated.

  The “second rotating shaft” is rotated by engaging with the second type impeller, and is provided inside the first rotating shaft and penetrating in the axial direction.

The “first liquid introducing means” is means for introducing a water flow to the first type impeller.
The “second liquid introducing means” is a means for introducing a water flow to the second type impeller.
The “first power generation means” includes a plurality of magnets that rotate integrally with one of the first rotation shaft and the second rotation shaft, and a plurality of coils that rotate integrally with the other.

The “second power generation means” includes one or more rotors that rotate integrally with the second rotating shaft, and the one or more rotors that are coaxially and one-to-one combined, and are fixedly disposed in the device space. One or more stators, a plurality of coils provided on the one or more rotors, and a plurality of coils provided on the one or more stators.
Of course, the relative positional relationship between the magnet and the coil in the first power generation means is set so that a voltage can be induced in the coil by the relative displacement between the magnet and the coil. The relative positional relationship between the coils provided in the stator / rotor of the second power generation means is set so that a voltage can be induced in the coil provided on the stator side by the relative displacement between the coils. The
The “fixing means” is means for holding one or more stators of the second power generation means fixedly in the apparatus space.

The “first bearingless support means” is a support means that keeps the first rotating shaft and the second rotating shaft in a non-contact state during rotation, and is a bearingless (supporting method that does not use a bearing).
The “second bearingless support means” is a support means that keeps one or more rotors and the corresponding stators in a non-contact state during rotation, and is bearingless.
The “bearing means” supports both ends of the second rotating shaft when not rotating.
“Control means” is means for controlling the first and second bearingless support means.

The first bearingless support means includes a “magnetic support coil for the first bearingless support means” for applying an electromagnetic force to the plurality of magnets of the first power generation means.
The second bearingless support means has a “magnetic support coil for the second bearingless support means” on the stator side for applying an electromagnetic force to “a plurality of coils on the rotor side” of the second power generation means. .
The “control means” controls each electromagnetic force by adjusting the energization amount to each magnetic support coil for the first and second bearingless support means.

  A part of the electric power generated by the first power generation means and the second power generation means is used as power for the first and second bearingless support means and the control means.

It is preferable that the first-type impeller and the second-type impeller of the phase inversion cross-flow power generation device according to claim 1 are both configured by “two or more impellers having a staggered arrangement” (claim 2).
Further, in the phase inversion cross-flow power generation device according to claim 1 or 2, the bearing means for supporting both ends of the second rotating shaft when not rotating is preferably a “touch-down sleeve having a labyrinth seal function”. Item 3).

The phase inversion cross-flow power generator according to claim 1, 2 or 3, wherein the first-type impeller and the second-type impeller are submerged, and the first and second liquid introduction means are supplied with an inflowing water flow. Can be nozzles that accelerate toward the first and second type impellers, respectively.
The phase-inversion cross-flow power generator according to claim 1, 2, or 3 is also configured such that the first-type impeller and the second-type impeller are exposed to the air, and the first and second liquid introduction units are configured to pass the water flow first. Liquids can be introduced from above toward the first and second type impellers, respectively.
6. The phase inversion cross-flow power generator according to claim 1, wherein control of the first and second bearingless support means by the control means is induced in a power generation coil of the first and second power generation means. The voltage: V, current: I, and winding resistance: R are parameters, and the output current value to the magnetic support coil for the first and second bearingless support means can be determined as a function of these parameters. 6).

  As described above, the “first power generation means” includes a plurality of magnets and a plurality of coils. The magnet rotates integrally with “one of the first rotating shaft and the second rotating shaft”, and the coil is integrated with the other. Rotate. For example, if the magnet rotates integrally with the first rotating shaft, the coil rotates integrally with the second rotating shaft. In this case, the rotation of the magnet occurs in the “first direction”, and the rotation of the coil occurs in the “second direction”.

  The number of the plurality of magnets / coils to be rotated integrally with the first and second rotating shafts is not particularly limited and can be appropriately selected. However, 4 to 5 or more are preferable from the practical viewpoint. The number of the plurality of coils provided in the stator / rotor of the second power generation means is not particularly limited and can be appropriately selected. However, 4 to 5 or more are preferable from the practical viewpoint.

As described above, according to the present invention, a novel “phase-inverted cross-flow power generation device” can be realized. Since this “phase-inverted cross-flow power generation device” is a cross-flow type, the blade shape of the impeller may be simpler than that of an axial flow type and is easy to manufacture.
In addition, since a part of the electric power generated by the first power generation means and the second power generation means is used as the power for the first and second bearingless support means and the control means, the first and second bearing support means and A dedicated power source for operating the control means is not required.

  Further, since the shaft support at the time of rotation is bearingless, mechanical resistance to rotation is extremely small, and therefore efficient power generation is possible.

Hereinafter, embodiments will be described.
FIG. 1 is a diagram for explaining one embodiment of a “phase-inversion cross-flow power generation device”.

  This phase inversion cross-flow power generation device generates power in a state where the whole is submerged in a water stream.

  Fig.1 (a) is the general | schematic figure which looked at the phase inversion crossflow type power generator from the inflow side of the water flow.

In FIG. 1A, reference numeral 41 denotes a first nozzle, reference numeral 42 denotes a second nozzle, and reference numeral 50 denotes a casing.
1B is a cross-sectional view taken along line bb in FIG. 1A, and FIG. 1C is a cross-sectional view taken along line cc.

  In this embodiment, the horizontal size in FIG. 1A is 500 mm, the height size is 300 mm, and the horizontal size in FIGS. 1B and 1C is about 700 mm.

As shown in FIG. 1A, when the phase-inversion cross-flow power generation device is viewed from the inflow side of the water flow, nozzles 41 and 42 that are “first and second liquid introduction means” are provided in the central portion 51 of the casing 50. Is formed. As shown in FIGS. 1B and 1C, the first type impeller 11, the second type impeller 12 and the like are mounted on the central portion 51 of the casing 50, and the side end portions 52A and 52B on both sides are mounted. In addition, a rotor, a stator, bearing means and the like which will be described later are mounted.
The water flow flows from the front side to the back side of the drawing in a direction orthogonal to the drawing of FIG.

  In FIG. 1B, reference numeral 12 denotes a second type impeller, reference numeral 22 denotes a second rotating shaft, reference numeral 22 </ b> A denotes a blade support portion, and reference numeral 53 denotes a discharge port of the casing 50. In FIG. 1C, reference numeral 11 denotes a first type impeller, reference numeral 22 denotes a first rotating shaft, and reference numeral 21 </ b> A denotes a blade support portion integrated with the first rotating shaft 21. As shown in these drawings, the nozzles 41 and 42 as the first and second liquid introduction means are formed in the central portion 51 as a part of the casing 50.

As shown in FIG. 1C, the water flow WI flows into the first nozzle 41 from the left side of the figure.
The first nozzle 41 has a channel cross-sectional area that decreases from the inlet toward the jet nozzle 41A on the first type impeller 11 side, and the inflowing water flow WI passes through the first nozzle 41 to the jet outlet 41A. It is accelerated by decreasing the “flow cross-sectional area” while flowing in the direction. The water flow accelerated and increased in flow velocity is ejected from the ejection hole 41A toward the blade 111 of the first type impeller 11, and after rotating the first type impeller 11 counterclockwise, becomes a water flow WF. It is discharged from the outlet 53 and becomes a water flow WO.

  As shown in FIG. 1B, the water flow WI flows into the second nozzle 42 from the left side of the figure. The second nozzle 42 has a channel cross-sectional area that narrows from the inlet toward the jet outlet 42A on the second type impeller 12 side, and the inflowing water flow WI passes through the second nozzle 42 to the jet outlet 42A. It is accelerated by decreasing the “flow cross-sectional area” while flowing in the direction. The water flow accelerated and increased in flow velocity is ejected from the ejection hole 42A toward the blade 121 of the second type impeller 12, and after rotating the second type impeller 12 clockwise, becomes a water flow WF. It is discharged from 53 and becomes a water stream WO.

  In the casing 50, the first-type impeller 11 and the second-type impeller 12 are separated by a partition wall of the casing 50 so that water flows that rotate the respective impellers do not interfere with each other. The discharge port 53 formed in the casing 50 opens in common with respect to the water flow in which the first type impeller 11 and the second main impeller 12 are rotated, and as shown in FIGS. The diffuser shape has a cross-sectional area that gradually increases toward the discharge side end.

As shown in FIG. 1C, the first type impeller 11 is provided on a blade support portion 21A integrated with the first rotating shaft 21, and as shown in FIG. The blade support part 22 </ b> A integral with the second rotating shaft 22 is provided.
In addition, although the blades 111 and 121 of the first and second type impellers are drawn in a flat plate shape for the sake of simplicity of illustration, they are actually formed in a “shape that can effectively receive water flow”. Needless to say.

FIG. 2 illustrates the inside of the casing 50 in an explanatory manner.
The second rotating shaft 22 has rotors 71 and 72 fixed to both sides in the longitudinal direction, and both ends in the longitudinal direction are pivotally supported by bearings 61 and 62 which are “bearing means”. As will be described later, the bearings 61 and 62 support the second rotary shaft 22 "when not rotating".

  The blade support portion 22A has a “disc-shaped bowl-shaped portion” integrated with the second rotating shaft 22, and the outer peripheral portion of the bowl-shaped portion has two cylindrical portions 22A1, 22A2 having steps in the axial direction. Wings 121 are fixed to the outer peripheral surface of the large-diameter cylindrical portion 22A1 (the portion indicated by reference numeral 22A in FIG. 1B), and a plurality of coils 23A are provided on the outer peripheral surface of the small-diameter cylindrical portion 22A2. The two coils 24A are fixed to be “axisymmetric with respect to the second rotating shaft 22” and are integrally mounted with these coils 23A. In this embodiment, the number of coils 23A and 24A is the same, but the number of coils is not necessarily the same. For example, a coil 24A may be provided for every other coil 23A.

  The first rotating shaft 21 is hollow and is penetrated by the second rotating shaft 22 in the longitudinal direction. The first rotating shaft 21 has a “disk-shaped bowl-shaped part”. The outer peripheral part of the bowl-shaped part forms a cylindrical blade support part 21 </ b> A, and a blade 111 is fixed to the outer peripheral surface thereof. The inner peripheral surface of the wing support portion 21A is opposed to the outer peripheral surface of the small-diameter cylindrical portion 22A2 of the wing support portion 22A with a gap therebetween, and a plurality of magnets 25A are provided with coils 23A, It is axisymmetrically mounted so as to face 24A.

  That is, the blade support portion 21A integral with the first rotating shaft 21 and the blade 111 fixed thereto constitute a first type impeller (indicated by reference numeral 11 in FIG. 1 (c)) and perform the second rotation. The blade support portion 22A integrated with the shaft 22 and the blade 121 fixed to the blade support portion constitute a second type impeller (indicated by reference numeral 12 in FIG. 1B).

  The plurality of magnets 25A and the plurality of coils 23A are “magnets / coils included in the first power generation means”. That is, when the first-type impeller 11 and the second-type impeller 12 rotate in opposite directions, the magnetic field of the magnet 25A crosses the coil 23A to generate an induced electromotive force in the coil 23A.

  The plurality of coils 24 </ b> A are “magnetic support coils for the first bearingless support means” for applying an electromagnetic force to the plurality of magnets 25 </ b> A of the first power generation means.

  The rotor 71 fixed to the second rotating shaft 22 has a flange shape, and a plurality of coils 71 </ b> A are fixed to the second rotating shaft 22 symmetrically with respect to the outer periphery of the cylindrical surface. Further, the stator 73 formed in a cylindrical shape concentric with the rotor 71 is fixedly held by the side end portion 52A of the casing 50, and a plurality of coils 75A are opposed to the coils 71A on the inner peripheral portion thereof. A plurality of coils 77 </ b> A are fixed to be symmetrical with respect to the first rotating shaft 22 integrally with the coils 75 </ b> A.

  Similarly, the rotor 72 fixed to the second rotating shaft 22 has a flange shape, and a plurality of coils 72A are fixed to the outer periphery of the cylindrical surface on the outer periphery of the second rotating shaft 22 so as to be symmetrical about the second rotating shaft. Further, the stator 74 formed in a cylindrical shape concentric with the rotor 72 is fixedly held by the side end portion 52B of the casing 50, and a plurality of coils 76A are opposed to the coils 72A on the inner peripheral portion thereof. A plurality of coils 78 </ b> A are fixed to be symmetrical with respect to the first rotating shaft 22 integrally with the coils 76 </ b> A.

  A plurality of coils 71A fixed to the rotor 71 and a plurality of coils 72A fixed to the rotor 72 are connected to a plurality of coils 23A provided to the second rotating shaft 22 via a rectifier, a chopper, or the like. A predetermined magnetic field is generated as a “field coil” by applying a constant voltage to a part of the induced voltage generated in the coil 23A.

  The plurality of coils 71A and 72A fixed to the rotors 71 and 72 and the plurality of coils 75A and 76A fixed to the stators 73 and 74 are “coils included in the second power generation means”. That is, when the second rotary shaft 22 rotates together with the second type impeller 12, the rotors 71 and 72 rotate integrally therewith, and the magnetic fields of the coils 71A and 72A integrated therewith (the above “ When a predetermined magnetic field ") crosses the coils 75A and 76A, an induced electromotive force is generated in the coils 75A and 76A.

  The plurality of coils 77A, 78A are “second bearings” for applying electromagnetic force (magnetic repulsive force or magnetic attraction force, hereinafter simply referred to as “magnetic force”) to the plurality of coils 71A, 72A of the second power generation means. It is a magnetic support coil for the support means.

  The first rotating shaft 21, the second rotating shaft 22, the blade support portion 22A, and the like are magnetic bodies such as iron and constitute a magnetic path of a magnetic circuit.

  In FIG. 2, reference numerals S <b> 1 </ b> A and S <b> 1 </ b> B denote position sensors that detect the position of the first rotating shaft 21. Reference numerals S2A1, S2B1, S2A2, and S2B2 denote position sensors that detect the positions of both ends of the second rotating shaft 22. These position sensors are all known “eddy current sensors”.

  As shown in FIG. 3B, the position sensors S1A and S1B are arranged in two directions orthogonal to the “rotation center (rotation axis center) P that the first rotation shaft 21 should occupy during rotation”. The position of the rotation shaft 21 is detected, and the position sensors S1A and S1B detect the “shift amount and direction from the rotation center P to be occupied during rotation” of the rotation center of the first rotation shaft 21. The

  As shown in FIG. 3 (a), the position sensors S2A1, S2B1, S2A2, and S2B2 are orthogonal to each other with respect to the “rotation center (rotation axis center) Q that both ends of the second rotation shaft 22 should occupy during rotation”. The positions of both ends of the second rotating shaft 22 are detected in the direction, and these position sensors S2A1, S2B1, S2A2, and S2B2 are used to detect the “occupy during rotation” of the rotation centers at both ends of the second rotating shaft 22. The amount of deviation from the rotation center Q and its direction "are detected.

Returning to FIG. 2, “control 1” is a control unit that controls the rotation center position of the first rotation shaft 21, and “control 2” is a control unit that controls the rotation center position of the second rotation shaft 22. The control 1 is provided integrally with the blade support 22 </ b> A, but the control 2 is provided fixed to the casing 50 at an appropriate position in the casing 50.
The detection outputs of the position sensors S1A and S1B are input to the control 1, and the control 1 passes the control current to the coil 24A in accordance with this input information, and the electromagnetic field in which the induced magnetic field by these coils 24A acts on the magnet 25A. The rotation center position of the first rotation shaft 21 is controlled to “position to be occupied during rotation (rotation center P shown in FIG. 3)” by force (magnetic force).

  The detection outputs of the position sensors S2A1, S2B1, S2A2, and S2B2 are input to the control 2. The control 2 passes these control currents to the coils 77A and 78A of the stators 71 and 72 according to this input information, and these coils. The rotational center positions at both ends of the second rotating shaft 22 are determined as “positions to be occupied during rotation (the rotational center shown in FIG. Q) ".

  The calculation units of the control 1 and the control 2 are constituted by a CPU and a DSP (digital signal processor), and in order to realize the electromagnetic force that acts on the magnet 25A and the coils 71A and 72A, the power generation in the first and second power generation means. Inductive voltage: V, current: I, winding resistance: R in the coils 23A, 75A, 76A for use as parameters, and as a function thereof, magnetic support coils 24A, 77A for the first and second bearingless support means, Determine the output current value to 78A.

  In this way, the “rotation center position of both ends of the second rotation shaft 22” is controlled by the control 2 to an appropriate position (position Q in FIG. 3A) at the time of rotation, and the “first rotation shaft 21 is controlled by the control 1. The “rotation center position” is controlled to an appropriate position (position P in FIG. 3B) during rotation. In such a controlled state, both the first rotating shaft 21 and the second rotating shaft 22 are pivotally supported in a floating state by a magnetic force to be in a “bearingless support state”.

  That is, the plurality of magnets 25A and the plurality of coils 24A constitute “first bearingless support means for keeping the first rotation shaft and the second rotation shaft in a non-contact state during rotation”, and the plurality of coils 71A, 72A and these The plurality of coils 77A and 78A corresponding to the above constitutes “second bearingless support means that keeps the one or more rotors 71 and 72 and the corresponding stators 73 and 74 in a non-contact state during rotation”.

  The position sensors S1A, S1B, S2A1, S2B1, S2A2, S2B2, and the control 1 and the control 2 constitute "control means for controlling the first and second bearing support means".

FIG. 4 is an “electrical system diagram of power generation” in the embodiment described above.
As described above, the first power generation unit 401 includes a plurality of magnets 25A and a plurality of coils 23A, and the second power generation unit 402 includes a plurality of coils 71A and 72A and a plurality of coils 75A and 76A. Composed.

  A portion surrounded by a broken line indicates the control means 403. The control means 403 includes a first position sensor 4031, a second position sensor 4032, control 1 and control 2. The first position sensor 4031 is composed of the position sensors S1A and S1B, and the second position sensor 4032 is composed of the position sensors S2A1, S2B1, S2A2, and S2B2.

  The electric power generated by the first power generation means 401 is fed to the “part composed of the first position sensor 4031 and the control 1” of the control means 403. Further, as described above, a part of the electric power generated by the first power generation means 401 is fed to the coils 71A and 72A, which are field coils in the second power generation means 402, through the rectifying means and the chopper, as described above. Magnetic field "is generated.

  The electric power generated by the second power generation means 402 is fed to the “part constituted by the second position sensor 4032 and the control 2” of the control means 403. Controls 1 and 2 have “rectifying means” for rectifying supplied power (voltage), and have smoothing means for smoothing the rectified voltage.

  Part of the smoothed voltage is applied to the first and second position sensors 4031 and 4032 as a driving voltage. The output of the first position sensor 4031 is input to the control 1, digitized by an A / D converter built in the control 1, and input to a calculation unit such as a CPU or DSP built in the control 1. The calculation unit determines output information to the first bearingless support means 404 based on the input information, and controls the rotation center position of the first rotating shaft 21 to an appropriate position by passing a control current to the coil 24A according to the output information. To do.

Similarly, the output of the second position sensor 4032 is input to the control 2, digitized by an A / D converter built in the control 2, and input to a calculation unit such as a CPU or DSP built in the control 2. The calculation unit determines output information to the second bearingless support means 405 based on the input information, and passes a control current to the coils 77A and 78A in accordance with this output information to set the rotation center position of the second rotation shaft 22 to an appropriate position. To control.
The electric power generated by the second power generation unit 402 is supplied to the battery 407 and the load 408.
The number of the magnets 25A, the coils 71A and 72A, the coils 23A, 24A, 75A, 76A, 77A, and 78A is not particularly limited and can be appropriately selected, and is, for example, about 10 to 32.

  The phase inversion crossflow power generator described above with reference to FIGS. 1 to 4 is a crossflow power generator having a rotating shaft in a direction intersecting the water flow. A first type impeller 11 that rotates in a first direction, a second type impeller 12 that receives a water flow and rotates in a second direction opposite to the first direction, and a first and a second type impeller. A first rotating shaft 21 that is coaxial and is engaged with the first type impeller 11 and rotated, and a first rotating shaft 21 that is engaged with the first type impeller 12 and rotated, and is axially centered inside the first rotating shaft 21. A penetrating second rotating shaft 22, a first liquid introduction means 41 for introducing a water flow to the first type impeller, a second liquid introduction means 42 for introducing the water flow to the second type impeller, First power generation means 4 including a plurality of magnets 25A that rotate integrally with one of the first rotation shaft and the second rotation shaft, and a plurality of coils 23A that rotate integrally with the other. 1, one or more rotors 71, 72 that rotate integrally with the second rotating shaft 22, and the one or more rotors are coaxially and one-to-one combined, and are fixedly disposed in the device space. Second power generating means including one or more stators 73 and 74, a plurality of coils 71A and 72A provided in the one or more rotors, and a plurality of coils 75A and 76A provided in the one or more stators. 402, a fixing means 50 for holding one or more stators of the second power generation means fixedly in the apparatus space, and a first rotating shaft 21 and a second rotating shaft 22 that are kept in non-contact during rotation. The bearingless support means 404, the second bearingless support means 405 that keeps the one or more rotors 71, 72 and the corresponding stators 73, 74 in a non-contact state during rotation, and the second rotating shaft 22 Bearing means 61, 6 for supporting both ends when not rotating And a control means 403 for controlling the first and second bearing support means. The first bearingless support means 404 is a first bearing for applying electromagnetic force to the plurality of magnets 25A of the first power generation means. The second bearingless support means 405 includes a first magnetic support coil 24A for the less support means. The second bearingless support means 405 is a first bearing for applying an electromagnetic force to the plurality of coils 71A, 72A on the rotor 71, 72 side of the second power generation means. Magnetic support coils 77A and 78A for two bearingless support means are provided on the side of the stators 73 and 74, and the control means 403 goes to each of the magnetic support coils 24A, 77A and 78A for the first and second bearingless support means. Each of the electromagnetic forces is controlled by adjusting the energization amount of the first and second power generation means 401 and the second power generation means 402. The power is used for the non-grid support means and the control means (claim 1).

  Further, the phase inversion cross-flow power generation apparatus described above in the embodiment is such that the first type impeller 11 and the second type impeller 12 are submerged, and the first and second liquid introduction means are The nozzles 41 and 42 accelerate the inflowing water flow toward the first type and second type impellers, respectively (claim 4). Then, “control of the first and second bearingless support means 404, 405” by the control means 403 includes the induced voltage: V, current: I in the power generating coils 23A, 75A, 76A of the first and second power generating means. The winding resistance: R is a parameter, and the output current value to the magnetic support coils 24A, 77A, 78A for the first and second bearingless support means is determined as a function of these parameters (Claim 6).

  FIG. 5 is a diagram for explaining a preferred configuration example of the bearings 61 and 62 which are “bearing means for supporting the both ends of the second rotating shaft 22 when not rotating” in the embodiment described above.

  This bearing means is a “touch-down sleeve having a labyrinth seal function”. That is, in FIG. 5, reference numeral 503 indicates “receiving portions” of the bearings 61 and 62. The receiving portion 503 is formed with a plurality of wedge-shaped grooves arranged in the axial direction.

  On the other hand, reference numeral 501 indicates “an engaging portion that engages with the receiving portion 503”. The engaging portion 503 is fixed to the end portion of the second rotating shaft 22, and a “groove portion having a wedge-shaped cross section” is formed on the peripheral surface portion of the engaging portion 503 so as to engage with the groove of the receiving portion 503.

  In order to engage with the engaging portion 501, the receiving portion 503 is vertically divided into two by a plane including the rotation shaft, and the engaging portion 501 is engaged with the “lower receiving portion” in the divided state. Further, the engaging portion 501 and the “upper receiving portion” are engaged with each other, and the upper and lower receiving portions are fixed to each other to form a bearing 62. The support by the bearing 61 on the other end side of the second rotating shaft 22 is the same.

  In such a bearing, the engaging portion between the receiving portion 503 and the engaging portion 501 has a “labyrinth seal function”. That is, when the second rotating shaft 22 rotates, water between the receiving portion 503 and the engaging portion 501 forms a high-speed flow, and the pressure in this portion decreases, so that water flows in from the surroundings, and the receiving portion 503. And the engaging portion 501 form a high pressure region, and the second rotating shaft 22 rotates without contact between the receiving portion 501 and the engaging portion 501 due to the effect of “fluid bearing”, and the receiving portion 503. Since the space between the engagement portion 501 is in a high pressure state, inflow of water from the surroundings is prevented.

  The engaging portion 501 and the receiving portion 503 are made of a non-magnetic material such as aluminum or copper so that the engaging portion and the receiving portion are not magnetically attracted, and the portion where both engage is a mold release. In order to improve the properties, it is preferable to coat with Teflon (registered trademark).

  As the number of blades in the first-type impeller and the second-type impeller increases, the time for the water flow to act on the individual wings becomes shorter, and the rotation of the impeller becomes smoother. However, if the number of blades is too large, the water flow acting on the blades is blocked by the adjacent blades and the efficiency of rotating the impeller is reduced. In order to solve such a problem, both the first-type impeller and the second-type impeller may be constituted by “two or more impellers having a staggered arrangement” (claim 2).

FIG. 6 shows an example in which the first type impeller is constituted by “two impellers having a staggered arrangement”.
The first type impeller integrated with the first rotating shaft 21 is divided into two impeller parts in the rotation direction (a direction orthogonal to the drawing of FIG. 6), and these two impeller parts are integrated. ing. In the drawing, the wing 610 indicated by the solid line is “the wing fixed to one impeller portion”, and the wing 620 indicated by the broken line is “the other impeller portion (coaxial with one impeller portion and orthogonal to the drawing”. The wings are solidly mounted on the wing.

  Blades 610 and 620 are out of phase with each other in the direction of rotation. For this reason, the number of wings as the first type impeller is “total number of wings 610 and 620”, and since the number of wings is large, the rotation as the first type impeller is smoothly performed, while the mutual distance between the wings 610, Since the mutual space | interval in the wing | blade 620 is large and the phase has shifted | deviated mutually, each wing | blade can receive the effect | action of a water flow effectively and rotation efficiency is high.

  In the embodiment described above, both the first type impeller 11 and the second type impeller 12 rotate in a submerged state. For this reason, the water filling the casing 50 becomes resistance to rotation of the first type impeller and the second type impeller. In order to rotate the first type impeller and the second type impeller against this resistance, the inflowing water flow is accelerated by the nozzles 41 and 42 and sprayed to the respective blades 111 and 121.

  As a method for reducing the resistance of water to the rotation of the impeller, the wing is movable with respect to the wing support, and the wing attitude with respect to the water flow is changed depending on the position of the wing. Various methods for "are known. Here, an example will be described with reference to FIG.

  In FIG. 7A, reference numeral 22A1 indicates “a blade support portion of the second type impeller”, and reference numeral 121A indicates one blade. A notch 22A10 as shown in the figure is formed in the blade fixing portion on the outer peripheral surface of the blade support portion 22A1, and the blade 121A is provided at the base M so as to be swingable with respect to the blade support portion 22A1, and the solid line state and the broken line It is possible to freely take a position between those positions.

  In this way, as shown in FIG. 7 (b), “the wing 121A stands and effectively receives the action of the water flow” at the position where the water flow is received. Since the posture is changed so as to “sleep along the peripheral surface of the support portion 22A1”, the resistance of water to the rotation of the impeller can be effectively reduced. The water resistance in the first type impeller can be reduced in the same manner.

  FIG. 8 is an explanatory diagram showing only a characteristic part of an embodiment of the phase-inversion cross-flow power generator according to claim 5. The power generator of this embodiment is used in a “water channel with a drop”, and the first type impeller 85 and the second type impeller 87 are provided in the casing 83 and exposed in the air. A lower portion of the casing 83 is opened, and a tank 80 is provided at the upper portion.

  A first liquid introducing means 81 and a second liquid introducing means 82 are formed at the bottom of the tank 80. The tank 80 is arranged to receive flowing water from above, and stores the flowing water. The stored water is guided downward by the first liquid introducing means 81 and the second liquid introducing means 82.

  The falling water W1 from the liquid introducing means 81 falls on the first type impeller 85 from above and rotates the first type impeller 85 (integrated with the first rotating shaft 21) counterclockwise. The falling water W1 from the liquid introduction means 82 falls on the second type impeller 86 from above and rotates the first type impeller 86 (integrated with the second rotating shaft 22) clockwise.

  The support of the impeller and the power generation mechanism are the same as those in the above-described embodiment.

It is a figure for demonstrating one Embodiment of a phase inversion crossflow type electric power generating apparatus. It is a figure for demonstrating the part of the electric power generation means in embodiment of FIG. It is a figure for demonstrating the position sensor which detects the position of the rotation center of a 1st, 2nd rotating shaft. It is a figure for demonstrating the electric power generation system of embodiment of FIG. It is a figure for demonstrating a bearing means. It is a figure for demonstrating the characterizing part of the invention of Claim 2. It is a figure which shows only the 1st modification of embodiment of FIG. FIG. 10 is a diagram schematically showing only a characteristic part of an embodiment of the invention as set forth in claim 5;

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Type 1 impeller 12 Type 2 impeller 21 First rotation shaft 22 Second rotation shaft 23A Power generation coil 24A Magnetic support coil 25A Magnet 41 First nozzle 42 Second nozzle 50 Casing 71 Rotor 72 Rotation Child 71A Field coil 72A Field coil 73 Stator 74 Stator 75A Power generation coil 76A Power generation coil 77A Magnetic support coil 78A Magnetic support coil

Claims (6)

A cross flow type power generator having a rotation axis in the direction intersecting the water flow,
A first type impeller that rotates in a first direction in response to a water flow;
A second type impeller that receives the water flow and rotates in a second direction opposite to the first direction;
A first rotating shaft that is coaxial with the first and second type impellers and is rotated by engaging with the first type impeller;
A second rotating shaft that is engaged with and rotated by the second type impeller and penetrates inward of the first rotating shaft in an axial direction;
First liquid introducing means for introducing a water flow to the first type impeller;
Second liquid introduction means for introducing a water flow to the second type impeller;
First power generation means including a plurality of magnets that rotate integrally with one of the first rotation shaft and the second rotation shaft, and a plurality of coils that rotate integrally with the other;
One or more rotors that rotate integrally with the second rotation shaft, and one or more stators that are coaxially and one-to-one combined with the one or more rotors and are fixedly disposed in the device space And a plurality of coils provided on the one or more rotors, and a plurality of coils provided on the one or more stators;
Fixing means for fixedly holding one or more stators of the second power generation means in the device space;
The first bearingless support means that keeps the first rotating shaft and the second rotating shaft in a non-contact state during rotation, and the one or more rotors and the corresponding stator are kept in a non-contact state during the rotation. Second bearingless support means;
Bearing means for supporting both ends of the second rotating shaft when not rotating;
Control means for controlling the first and second bearingless support means,
The first bearingless support means has a magnetic support coil for the first bearingless support means for applying electromagnetic force to the plurality of magnets of the first power generation means,
The second bearingless support means has a magnetic support coil for the second bearingless support means on the stator side for applying electromagnetic force to the plurality of coils on the rotor side of the second power generation means,
The control means controls the electromagnetic force by adjusting the energization amount to the magnetic support coils for the first and second bearingless support means,
Phase-inverted cross-flow power generation characterized in that a part of the power generated by the first power generation means and the second power generation means is used for the first and second bearingless support means and the control means. apparatus. In the phase inversion crossflow type power generator according to claim 1,
A phase inversion cross-flow power generator, wherein both the first-type impeller and the second-type impeller are composed of two or more impellers having a staggered arrangement. In the phase inversion crossflow type power generator according to claim 1 or 2,
A phase-inversion cross-flow power generator, wherein the bearing means for supporting both ends of the second rotating shaft when not rotating is a touch-down sleeve having a labyrinth seal function. In the phase inversion crossflow type power generator according to claim 1, 2 or 3,
Type 1 impeller and Type 2 impeller are submerged,
The phase inversion crossflow type power generator characterized in that the first and second liquid introduction means are nozzles for accelerating the flowing water flow toward the first and second type impellers, respectively. In the phase inversion crossflow type power generator according to claim 1, 2 or 3,
Type 1 and Type 2 impellers are exposed in the air,
The cross flow type power generator characterized in that the first and second liquid introducing means are configured to introduce a water flow toward the first and second type impellers from above. In the phase inversion crossflow type power generator according to any one of claims 1 to 5,
The control of the first and second bearingless support means by the control means is based on the functions of induction voltage: V, current: I, and winding resistance: R in the coils for power generation of the first and second power generation means. As described above, a phase inversion cross-flow power generation device is characterized in that an output current value to the magnetic support coils for the first and second bearingless support means is determined.

Images