JP2010071228A - Power generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vane-motor type power generating device that has a high conversion efficiency from energy of a fluid pressure to electrical energy, and is reduced in size so as to be used in a small space. <P>SOLUTION: A turbine 1 includes: a casing 11 having a suction port and a discharge port of the fluid; a rotor 12 provided eccentrically inside the casing 11 and having a plurality of magnets inside thereof; a vane provided so as to be protrudable from and retractable into the rotor 12; a coil core 17 provided outside the casing 11 and having a plurality of branches extending radially in parallel to a rotating plane of the rotor 12, in which chip ends of the plurality of branches are arranged near respective magnetic poles; and a plurality of coils 18 wound around the plurality of branches, respectively. The vane receives a pressure difference of the fluid between the suction port and the discharge port to rotate the rotor 12, an alternate magnetic field generated by the rotation of the rotor 12 changes a magnetic flux density passing through the plurality of coils 18 to generate a voltage. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power generation device that generates electric power using a vane motor that is one of rotation devices for converting energy of a fluid such as water or air into rotation energy.

  Conventionally, a vane motor is known as a rotating device (turbine) that converts fluid energy into rotational energy. The vane motor is a rotating device that has a simple configuration and directly converts a fluid pressure into a rotational force.

  A conventional vane motor will be described with reference to FIG. FIG. 7 is a diagram for explaining a conventional vane motor. In FIG. 7, the upper diagram is an overhead view when the vane motor is viewed from above, and the lower diagram is a cross-sectional view when the vane motor shown in the upper overhead view is cut along a straight line A. .

  As shown in FIG. 7, the turbine 4 as a conventional vane motor has a casing 41 (outer cylinder member) having a fluid inlet 45 and an outlet 46 and a circular inner wall, and is eccentric in the casing 41. The rotor 42 is arranged. The rotor 42 stores a plurality of vanes (in FIG. 7, six vanes 43a, 43b, 43c, 43d, 43e, and 43f). The vanes 43a to 43f are pushed by centrifugal force or springs. By being drawn out by various methods, the inner wall of the casing 41 is always in contact, and the fluid flow path is completely isolated.

  When a pressure difference is generated between the fluid in the suction port 45 and the fluid in the discharge port 46, a force of “cross-sectional area × pressure” is applied to the vanes 43 a to 43 f, and this force becomes the rotational force of the rotor 42. For example, when the pressure of the suction port 45 is increased, pressure is applied to the vanes 43a to 43f. However, since the center of the rotor 42 is in an eccentric position with respect to the casing 41, the vanes protruding from the rotor 42 are provided. The lengths of 43a to 43f are different from each other, and the cross-sectional areas receiving the forces in the vanes 43a to 43f are different. Since the rotor 42 is rotated by the sum of the rotational direction components of the forces applied to the vanes 43a to 43f, in the configuration shown in FIG. 7, the rotor 42 starts to rotate clockwise as a result.

  Here, a technique for generating electric power by taking out a central axis of a rotor that rotates by fluid energy and connecting it to a rotary generator is generally known (see, for example, Non-Patent Document 1).

Mechanism of hydropower generation [September 12, 2008], Internet <URL: http://www.kepco.co.jp/kids/search/page28.html>

  By the way, the above-mentioned conventional technology requires that a part of the central shaft of the rotor be taken out of the casing in order to generate electric power, and at that time, it is necessary to perform sealing so that the working fluid does not leak from the gap between the shaft and the bearing. There is. However, when the torque loss due to sealing is relatively large with respect to the generated torque, there has been a problem that the energy conversion efficiency from fluid pressure energy to electrical energy is deteriorated.

  In addition, the above-described conventional technology requires a space for installing the generator outside the vane motor and a space for connecting the generator and the central axis of the rotor, and is difficult to use in a narrow place. was there.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and has a high conversion efficiency from fluid pressure energy to electrical energy, and is miniaturized so that it can be used even in a narrow place. Another object is to provide a vane motor type power generator.

  In order to solve the above-described problems and achieve the object, this device is provided with an outer cylinder member having a fluid inlet and outlet, and is eccentrically provided inside the outer cylinder member and magnetized. Alternatively, a rotatable rotor having a plurality of magnets therein, a vane provided so as to protrude and retract with respect to the rotor, and provided on the outer side of the outer cylinder member, the rotor of the rotor around the rotation axis of the rotor A coil core having a plurality of branches radially extending in parallel to the rotation surface, each of the tips of the plurality of branches being disposed near a magnetized portion of the rotor or the magnetic pole of each of the plurality of magnets; and the coil core A plurality of coils wound around each of the plurality of branches, and the tip of the vane is in contact with the inner wall of the outer cylinder member to isolate the suction port side from the discharge port side. Side and said exhaust Requirement to generate a voltage by changing the magnetic flux density passing through the plurality of coils by an alternating magnetic field generated by rotating the rotor by receiving the pressure difference of the fluid from the mouth side by the vane. And

  According to the disclosed apparatus, since it is not necessary to take out the rotating shaft of the rotor for generating electricity from the inside filled with fluid to the outside air, the rotor can be completely sealed in the outer cylinder member, Torque loss associated with sealing such as an O-ring can be eliminated, and the energy conversion efficiency from fluid pressure energy to electrical energy can be increased. In addition, a rotating device (vane motor) that converts fluid energy into rotational energy can be integrated with a generator that converts rotational energy into electrical energy, and can be downsized for use in tight spaces. Become.

  Exemplary embodiments of a power generator according to the present invention will be described below in detail with reference to the accompanying drawings.

  The power generation device according to the first embodiment is a device in which a power generation function is added to a turbine (rotary device) as a vane motor. Hereinafter, this will be described with reference to FIGS. 1 is a horizontal cross-sectional view of the power generation apparatus according to the first embodiment, FIG. 2 is an overview when the power generation apparatus according to the first embodiment is viewed from above, and FIG. It is sectional drawing of the perpendicular direction of the electric power generating apparatus in. Here, FIG. 3 is a cross-sectional view in the vertical direction when the power generation device according to the first embodiment is cut along a straight line B shown in FIG.

  As shown in FIG. 1, a turbine 1 as a power generation device according to the first embodiment is arranged such that a rotatable rotor 12 is eccentric in a casing 11 (outer cylinder member) having a circular inner wall. The casing 11 has a fluid suction port 15 and a discharge port 16, and the rotor 12 stores a plurality of vanes (in FIG. 1, six vanes 13a, 13b, 13c, 13d, 13e, and 13f). Has been. The vanes 13a to 13f provided so as to be able to protrude and retract with respect to the rotor 12 are always in contact with the inner wall of the casing 11 by being pressed by a spring (not shown), for example, so as to completely isolate the fluid flow path. .

  As shown in FIG. 1, the turbine 1 as the power generation device in the first embodiment is different from the turbine 4 as the conventional vane motor shown in FIG. 7, and a plurality of magnets (in FIG. 1, 6 magnets 14a, 14b, 14c, 14d, 14e, and 14f). Here, as shown in FIG. 1, the six magnets 14 a to 14 f are arranged at an angle of 60 degrees around the rotation axis of the rotor 12.

  As shown in FIG. 2, in the turbine 1 as the power generation device according to the first embodiment, a soft magnetic coil core 17 having a plurality of radially extending branches is disposed on the outer side (upper surface) of the casing 11. Each of the plurality of branches of the coil core 17 extends radially around the rotation axis of the rotor 12 in parallel with the rotation surface of the rotor 12. Here, as shown in FIG. 2, the six branches of the coil core 17 extend radially every 60 degrees around the rotation axis of the rotor 12.

  As shown in FIG. 2, a coil 18 is wound around each of a plurality of branches of the coil core 17. Here, in this embodiment, as shown in FIG. 2, a case where the coil core 17 has six branches and six coils 18 are wound around each of the six branches will be described.

  The tips of the six branches of the coil core 17 are arranged in the vicinity of the magnetic poles of the six magnets 14a to 14f shown in FIG. That is, as shown in FIG. 3, the tip of the branch of the coil core 17 is located near the magnetic poles of the magnets (magnets 14f and 14c in the figure) inside the rotor 12 with the casing 11 in between. Has been placed.

  As shown in FIG. 3, the magnet 14c has an N pole on the top surface, and the magnet 14f has an S pole on the top surface. Although not shown in the drawing, similarly to the magnet 14c, the magnet 14a and the magnet 14e have the N pole on the top surface, and similarly to the magnet 14f, the magnet 14b and the magnet 14d have the S pole on the top surface. ing. That is, the six magnets 14a to 14f in the rotor 12 are arranged such that the magnetic poles of the magnets (for example, the magnet 14f and the magnet 14c) facing the rotation axis of the rotor 12 are opposite to each other. .

  Thereby, the magnetic lines of force due to the magnet (for example, magnet 14c) in the rotor 12 pass through the inside (branch) of the coil core 17 to another magnet (for example, magnet 14f) facing the rotation axis of the rotor 12. It is burned.

  In such a configuration, when a pressure difference is generated between the fluid in the suction port 15 and the fluid in the discharge port 16, the rotor 12 starts to rotate by the sum of the rotational direction components of the forces applied to the vanes 13a to 13f (FIG. 1). In the clockwise direction), the magnets 14a to 14f incorporated in the rotor 12 also rotate to generate an alternating magnetic field. Due to this alternating magnetic field, the magnetic flux density in the coil core 17 changes, and an induced electromotive force is generated in the coil 18 so that the electric power can be taken out.

  For this reason, the turbine 1 as the power generation device according to the first embodiment does not need to take out the power shaft (rotary shaft of the rotor 12) from the inside filled with fluid into the outside air for power generation. The rotor 12 can be completely sealed in the casing 11, torque loss related to sealing such as an O-ring can be eliminated, and the energy conversion efficiency from fluid pressure energy to electrical energy can be increased. It becomes.

  Further, the turbine 1 as the power generation apparatus in the first embodiment can be integrated with a vane motor that converts fluid energy into rotational energy and a generator that converts rotational energy into electrical energy, and can be used even in a narrow place. It is possible to reduce the size.

  In the first embodiment described above, the case where one coil core is installed has been described. In the second embodiment, the case where two coil cores are installed will be described with reference to FIG. In addition, FIG. 4 is a figure for demonstrating the electric power generating apparatus in Example 2. FIG.

  Here, in the configuration of the turbine 1 described in the first embodiment, an attractive force is generated between the magnets 14a to 14f embedded in the rotor 12 and the coil core 17 that is a soft magnetic material. For this reason, in the turbine 1 demonstrated in Example 1, friction arises between the rotating shaft part of the rotor 12, the rotor 12, and the casing 11, and energy conversion efficiency may fall.

  Further, in the configuration of the turbine 1 described in the first embodiment, in the magnets 14a to 14f in the rotor 12, the magnetic poles on the side not facing the coil core 17 (the magnetic poles on the lower side of the casing 11 shown in FIG. 3) Since there is no magnetic material that forms a magnetic path, the magnetic lines of force that emerge from the magnetic pole pass through the air and return to another magnetic pole. Such magnetic field lines may leak to the outside of the power generation system and be attracted to an external metal, or may have an adverse effect on an external electronic device or a magnetic card. For this reason, it is necessary to install a magnetic shield in order to reduce the amount of magnetic flux leaking to the outside.

  In order to solve these problems, the turbine 2 as the power generation device in the second embodiment is configured as described below.

  The turbine 2 as the power generation apparatus in the second embodiment has a configuration similar to that of the turbine 1 described with reference to FIG. 1 (a casing having an inlet and an outlet, a rotor having six magnets embedded therein, and a rotor against the rotor. 6 vanes provided freely.

  However, in the second embodiment, as shown in FIG. 4, the two coil cores 27 a and the coil core 27 b having the same configuration as the coil core 17 in the first embodiment are parallel to the rotation surface of the rotor 22 so as to sandwich the casing 21. Placed in. Here, FIG. 4 is a vertical sectional view when the turbine 2 is cut along a straight line corresponding to the straight line B shown in FIG.

  That is, as shown in FIG. 4, the coil core 27 a is disposed on the upper surface of the casing 21, and the coil core 27 b is disposed on the lower surface of the casing 21. In addition, six coils 28a and six coils 28b are wound around the six branches of the coil core 27a and the coil core 27b, respectively. The tip portions of the six branches of the coil core 27a and the coil core 27b are in the vicinity of the magnetic poles of six magnets embedded in the rotor 21 (only the magnet 24f and the magnet 24c are shown in FIG. 4). Placed in.

  In the turbine 2, the coil core 27a and the coil core 27b have the same shape, and the power generation amounts in the coil 28a and the coil 28b are equal to each other. Therefore, the forces acting between the coil core and the magnet are completely symmetrical and cancel each other. To zero.

  For this reason, the turbine 2 as the power generation apparatus according to the second embodiment can avoid friction between the rotating shaft portion of the rotor 22 and the rotor 22 and the casing 21, and can generate electricity from the fluid pressure energy. The energy conversion efficiency to energy can be further increased.

  In the turbine 2, most of the magnetic force lines emitted from the magnet pass through the coil core 27 a and the coil core 27 b so that the magnetic force lines do not leak to the outside.

  For this reason, the turbine 2 as the power generation device according to the second embodiment can prevent leakage of the magnetic lines of force to the outside, and does not need to install a magnetic shield.

  Further, in the turbine 2, power generation is performed in the coils 28a and 28b wound around the coil core 27a and the coil core 27b, respectively.

  For this reason, the turbine 2 as the power generation device in the second embodiment can obtain a power generation voltage twice that of the configuration of the first embodiment by connecting the coil 28a and the coil 28b in series. If 28a and coil 28b are connected in parallel, twice the current can be obtained, and the power generation amount and the power generation voltage can be increased.

  In the above-described second embodiment, the case where the two coil cores are arranged symmetrically with the casing interposed therebetween has been described, but in the third embodiment, the case where the two coil cores are arranged asymmetrically with the casing interposed therebetween is illustrated in FIG. This will be described with reference to FIG. 5 is an overview diagram when the power generation device in the third embodiment is viewed from above, and FIG. 6 is an overview diagram when the power generation device in the third embodiment is viewed from below.

  As described in the second embodiment, an attractive force due to a magnetic force is generated between the coil core and the magnet, and this attractive force changes according to the distance between the magnet and the tip of the coil core when the rotor rotates. In other words, unevenness of attraction that becomes maximum when the magnet and the coil core tip re-approach occurs. This unevenness of attractive force becomes cogging torque, which causes the rotation to become unsmooth or generate noise.

  Here, in the configuration of the turbine 2 described in the second embodiment, the coil core 27a and the coil core 27b are arranged vertically symmetrical (the same angle with respect to the rotation axis of the rotor 22). For this reason, the tip end of the coil core 27a and the tip end of the coil core 27b simultaneously approach the magnet again, and a cogging torque is remarkably generated.

  In order to solve this problem, the turbine 3 as the power generation device according to the third embodiment is configured as described below.

  The turbine 3 as the power generation device in the third embodiment has the same configuration as the turbine 2 as the power generation device in the second embodiment. That is, the turbine 3 includes a casing 31 having a suction port 35 and a discharge port 36, a coil core 37a wound with a coil 38a and a coil core 37b wound with a coil 38b (see FIGS. 5 and 6), and six It consists of a rotor in which magnets are embedded and six vanes (not shown) provided so as to protrude and retract with respect to the rotor.

  However, in the third embodiment, the lower coil core 37b is disposed with respect to the upper coil core 37a in a state where the coil core 37b is rotated to some extent about the rotation axis of the rotor. For example, as shown in FIGS. 5 and 6, the coil core 38 b is rotated 30 degrees with respect to the coil core 37 a. As a result, the positional relationship between the coil core 37a on the upper surface and the coil core 38b on the lower surface becomes asymmetric, and the phase of the voltage generated in the coil 38a and the voltage generated in the coil 38b with the rotation of the rotor are different. .

  For this reason, in the turbine 3 as the power generation device in the third embodiment, the top end of the coil core 37a on the top surface and the top end of the coil core 37b on the bottom surface are not re-approached simultaneously, and cogging torque can be reduced. It becomes possible to reduce the noise during the rotation of the rotor by smoothing the rotation.

  In the third embodiment, the case where the coil core 37b is arranged by being rotated by 30 degrees with respect to the coil core 37a has been described. However, the present invention is not limited to this, and the coil core 37a on the upper surface and the coil core on the lower surface are arranged. An arbitrary angle can be applied as long as the phase relationship of the voltage generated by the coil 38a and the phase of the voltage generated by the coil 38b are different because the positional relationship with respect to 37b is asymmetric.

  The configurations and operations shown in the first to third embodiments are merely examples, and the present invention is not limited to the embodiments and can be appropriately modified and used. For example, in the first to third embodiments, the structure in which the magnet is embedded in the rotor has been described as an example. However, the present invention can be implemented even in a configuration in which a magnetic field is created by magnetizing the rotor itself. . In addition, the number of magnets and coils, the fine shape, and the like can be changed according to the actual use situation.

  As described above, the power generation apparatus according to the present invention can efficiently convert the fluid pressure energy into electric energy, so that a pressure large enough to ignore the frictional resistance and a large flow rate for obtaining a high rotation speed can be obtained. It becomes possible to generate electricity using various energy that could not be used because it was not possible. For example, it is a force caused by wind power, wave power, human movement, and the like.

  In addition, since the power generation apparatus according to the present invention can be reduced in size, particularly reduced in thickness, a narrow place (in a water pipe, in a gas pipe, in a narrow wall where a turbine could not be installed so far) Etc.). In addition, it is reduced in size and weight and attached to the human body, pressure is applied to the tank containing the fluid by human movement, the turbine is rotated, and electric power is generated using the rotational force to supply power to the portable device. It can also be used for things.

  As described above, the power generation device according to the present invention is useful when power is generated by converting the energy of a fluid into rotational energy, and in particular, the conversion efficiency from fluid pressure energy to electrical energy is high, and Suitable for use in narrow spaces.

It is sectional drawing of the horizontal direction of the electric power generating apparatus in Example 1. FIG. It is a general-view figure at the time of seeing the electric power generating apparatus in Example 1 from the top. It is sectional drawing of the orthogonal | vertical direction of the electric power generating apparatus in Example 1. FIG. It is a figure for demonstrating the electric power generating apparatus in Example 2. FIG. It is a general-view figure at the time of seeing the electric power generating apparatus in Example 3 from the top. It is a general-view figure at the time of seeing the electric power generating apparatus in Example 3 from the bottom. It is a figure for demonstrating the conventional vane motor.

Explanation of symbols

1, 2, 3, 4 Turbine 11, 21, 31, 41 Casing 12, 22, 32, 42 Rotor 13a, 13b, 13c, 13d, 13e, 13f, 43a, 43b, 43c, 43d, 43e, 43f Vane 14a, 14b, 14c, 14d, 14e, 14f, 24c, 24f Magnet 15, 35, 45 Suction port 16, 36, 46 Discharge port 17, 27a, 27b, 37a, 37b Coil core 18, 28a, 28b, 38a, 38b Coil

Claims (3)

An outer cylinder member having a fluid inlet and outlet;
A rotatable rotor provided eccentrically inside the outer cylinder member, magnetized, or having a plurality of magnets inside;
A vane provided so as to freely protrude and retract with respect to the rotor;
The outer cylinder member has a plurality of branches radially extending around the rotation axis of the rotor and parallel to the rotation surface of the rotor, and each of the ends of the plurality of branches is attached to the rotor. A magnetic core, or a coil core disposed near the magnetic pole of each of the plurality of magnets;
A plurality of coils wound around each of the plurality of branches of the coil core;
With
The tip of the vane is in contact with the inner wall of the outer cylinder member to isolate the suction port side and the discharge port side, and the vane receives a pressure difference between the suction port side and the discharge port side to the vane. A power generator that rotates a rotor and generates a voltage by changing a magnetic flux density passing through the plurality of coils by an alternating magnetic field generated by the rotation of the rotor.   2. The power generator according to claim 1, wherein the coil core includes a first coil core and a second coil core arranged in parallel to a rotation surface of the rotor so as to sandwich the outer cylinder member.   The second coil core is configured so that the phase of the voltage generated in the plurality of coils included in the first coil core is different from the phase of the voltage generated in the plurality of coils included in the second coil core. The power generator according to claim 2, wherein the power generator is arranged in a state of being rotated about the rotation axis of the rotor with respect to the first coil core.

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