JP2005237128A - Energy conversion mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy conversion mechanism capable of converting energy with low energy loss. <P>SOLUTION: The energy conversion mechanism comprises a channel P, an annular recess 1a provided in the way of the channel P, an impeller F provided rotatably in the way of the channel P, an annular permanent magnet 5 having a split pole pattern provided on the outer circumference of the impeller F and being inserted into the annular recess 1a, and a plurality of coils 2 facing the annular permanent magnet 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an energy conversion mechanism that converts electrical energy into fluid kinetic energy or converts fluid kinetic energy into electrical energy.

  As this kind of energy conversion mechanism, for example, there is a wind power generator that converts kinetic energy of gas into electric energy (see, for example, Patent Document 1). In this wind power generator, a plurality of blades are rotatably mounted in a cylindrical case, a ring is provided on the outer periphery of the blade, and a plurality of permanent magnets are attached to the outer periphery of the ring. Are provided with a plurality of coils that are electrically connected to face the permanent magnet.

Therefore, in this wind power generator, when the blades receive wind force and rotate in the case, the permanent magnet also rotates, and accordingly, the magnetic lines cross the plurality of coils, and the induced electromotive force generated in the coils This is a mechanism for generating electricity.
JP-A-11-299197 (from page 2, right column, line 45 to page 3, left column, line 23, FIG. 1)

  However, in the wind power generator described above, since the ring and the permanent magnet are arranged in the case, the ring and the permanent magnet become a resistance when the fluid passes through the case, and the fluid smoothly Since the movement is hindered, energy loss occurs and efficient energy conversion is hindered.

  Therefore, the present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide an energy conversion mechanism that enables energy conversion with little energy loss.

  In order to achieve the above-described object, the flow path, the annular recess provided in the middle of the flow path, the impeller provided rotatably in the middle of the flow path, the outer periphery of the impeller, and the annular recess An annular permanent magnet having a divided magnetic pole pattern to be inserted into a plurality of coils and a plurality of coils facing the annular permanent magnet.

  According to the present invention, it is possible to convert energy from electrical energy to fluid kinetic energy or from fluid kinetic energy to electrical energy.

  Moreover, since the annular permanent magnet is inserted into an annular recess provided in the middle of the flow path, the movement of fluid in the flow path is not hindered. Therefore, it is possible to reduce energy loss when converting energy. That is, the energy conversion can be performed more efficiently than the conventional energy conversion mechanism.

  The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is a longitudinal sectional view of an energy conversion mechanism according to an embodiment. FIG. 2 is a perspective view of a side portion of the annular recess. FIG. 3 is a front view of the blades of the energy conversion mechanism according to the embodiment. FIG. 4 is a diagram showing the magnetic pole arrangement of the annular permanent magnet. FIG. 5 is a diagram showing another magnetic pole arrangement of the annular permanent magnet.

  As shown in FIG. 1, the energy conversion mechanism in one embodiment includes a case 1 provided with a flow path P, a coil 2, a shaft 3 provided rotatably in the case 1, and an outer periphery of the shaft 3. A plurality of blades 4 provided and an annular permanent magnet 5 provided on the outer periphery of the blade 4 are configured.

  The case 1 will be described in detail below. The case 1 has a cylindrical shape and is formed of a non-magnetic material. The diameter of the case 1 increases toward one end, and an annular recess 1a is provided on the inner peripheral side. It has been. Accordingly, the flow path P is formed by the case 1, and in this case, the inside of the case 1 becomes the flow path P, and the diameter of the flow path P is increased toward one end side, and the annular recess 1a is formed in the flow path P. It is provided in the middle of P. Further, the annular recess 1a is composed of side portions 1b and 1b and a bottom portion 1c. Then, of the side portions 1b and 1b, the side portion 1b located on the right side in FIG. 1, that is, the side portion 1b located on the downstream side in FIG. 1 is arranged along the circumferential direction as shown in FIG. Concavities and convexities are provided. More specifically, the irregularities are serrated.

  Moreover, the coil 2 facing the side portion 1b of the annular recess 1a is provided. The coils 2 are arranged on the left and right sides in FIG. 1 of the side portion 1b of the annular recess 1a to form a pair, and a plurality of pairs are provided along the circumference of the annular recess 1a. In addition, although the core which is not illustrated is inserted in the said coil 2, it is not necessary to have a core, but in order to obtain a big magnetic field, it is more preferable to insert a core.

  Further, in the case 1, a support body 7 that rotatably supports both end sides of the shaft 3 via ball bearings 6 is provided. The support 7 is composed of a ring (not shown) in which the ball bearing 6 is inserted in the middle, and a rod-like body (not shown) extending from both ends of the ring. End portions are respectively coupled to the inner periphery of the case 1 so as not to block the entire flow path P.

  Furthermore, a cylinder 8 having four blades 4 provided on the outer periphery is coupled to the middle of the shaft 3. If the blade 4 can be directly attached to the shaft 3, the cylinder 8 may be omitted. Therefore, in this case, the impeller F includes the shaft 3, the blade 4, and the cylinder 8.

  Although four blades 4 are attached to the shaft 3 as described above, the number of blades 4 is not limited to four and may be plural.

  An annular permanent magnet 5 is coupled to the outer periphery of each blade 4, and the annular permanent magnet 5 is divided into N and S poles alternately appearing along the circumference as shown in FIG. It has a magnetic pole pattern. That is, S poles and N poles are alternately arranged in the clockwise direction in FIG.

  The outer peripheral diameter of each blade 4 is set to be substantially the same as the inner peripheral diameter of the case 1, and the annular permanent magnet 5 provided on the outer periphery of each blade 4 is inserted into the annular recess 1 a of the case 1. Has been. Therefore, the annular permanent magnet 5 does not interfere with the inner periphery of the case 1.

  Next, the operation will be described. First, when converting the kinetic energy of the fluid into electric energy, specifically when the energy conversion mechanism is embodied in a generator, for example, the fluid is introduced into the case 1, that is, into the flow path P. And if a fluid is guide | induced to the flow path P, the blade | wing 4 will receive a fluid and the impeller F will rotate. At this time, the rotation of the impeller F causes the annular permanent magnet 5 to rotate about the shaft 3 as a rotation axis, so that the magnetic lines of force of the annular permanent magnet 5 also move, and the magnetic lines of force cross the coil 2. Then, an induced electromotive force is generated in the coil 2, and the kinetic energy of the fluid is converted into electric energy. When this energy conversion mechanism is used as a so-called generator that converts kinetic energy of fluid into electric energy, all the coils 2 may be connected in series and output to the outside. In addition, when the blade | wing 4 receives a fluid and rotates, axial force acts on the blade | wing 4, However Since the unevenness | corrugation is provided in the downstream side part 1b along the circumferential direction. The pressure of the fluid that enters between the convex portion of the side portion 1b and the annular permanent magnet 5 increases, and this pressure presses the annular permanent magnet 5 in a direction opposite to the force acting on the blades 4. Even if the blade 4 is elastically deformed by the axial force, the contact with the downstream side portion 1b of the annular permanent magnet 5 is prevented. Therefore, smooth rotation of the impeller F is ensured by the unevenness of the side portion 1b. Although the irregularities are serrated in the above-described manner, a certain interval is provided between the convex portions and the convex portions in a toothed manner, or the convex portions and the concave portions are not wedge-shaped. It may be arcuate.

  On the other hand, when converting electrical energy into kinetic energy, specifically when this energy conversion mechanism is embodied in a pump, for example, a current is passed through the coil 2 to create a rotating magnetic field with the plurality of coils 2. Here, the coils 2 and 2 which make a pair make the same magnetic pole generate | occur | produce on the side facing the side part 1b of the annular recessed part 1a. Note that the coils 2 forming a pair may be connected to each other so that the same magnetic poles are generated on the coils 2 and 2 on the side facing the side portion 1b of the annular recess 1a. Then, the annular permanent magnet 5 is attracted and rotated around the shaft 3 by the rotating magnetic field generated by the coil 2, and naturally the impeller F also rotates. For example, the left side of the flow path P in FIG. The fluid can be sucked in and discharged to the right in FIG. 1 of the flow path P, whereby electric energy is converted into fluid kinetic energy. Even in this case, smooth rotation of the impeller F is ensured by the unevenness of the side portion 1b.

  In the energy conversion mechanism in the present embodiment, the annular permanent magnet 5 has a diameter larger than the inner diameter of the flow path P and is inserted into the annular recess 1a. There is no hindrance to fluid movement. In addition, since the coil used for power generation and shaft driving is outside the flow path, the movement of the fluid is not hindered in this respect as well. Therefore, it is possible to reduce energy loss when converting energy. Therefore, efficient energy conversion is possible as compared with the conventional energy conversion mechanism. In addition, the unevenness of the side portion 1b ensures smooth rotation of the impeller F, thereby ensuring more efficient energy conversion.

  In the present embodiment, the coil 2 is provided inside the case 1, that is, the coil 2 is provided outside the flow path P. Also in this respect, the coil 2 prevents the fluid from moving. There is nothing.

  Further, since the diameter of the left end of the flow path in FIG. 1 is increased toward the end, when the fluid is guided into the flow path P, the fluid is guided into the flow path P while being compressed, Since the flow velocity is increased, more efficient energy conversion is performed.

  Furthermore, since the coil 2 can be made to face both surfaces of the annular permanent magnet 5, the amount of electric energy that can be converted is larger than that of the conventional energy conversion mechanism when used in applications converting kinetic energy to electric energy. In addition, it is possible to output a large shaft torque when used in an application for converting electrical energy into fluid kinetic energy.

  The coil 2 does not need to be provided in the flow path P, and the structure is simple because only the impeller F, the support 7 and the ball bearing 6 need be accommodated in the flow path P.

  When this energy conversion mechanism is used as a pump, for example, a motion transmission mechanism for transmitting a rotational motion of a motor or the like as in a conventional pump becomes unnecessary, and the pump can be miniaturized. Further, since the above-described motion transmission mechanism is not necessary, the structure can be simplified and the pump manufacturing cost is reduced. Furthermore, since the impeller F can be directly rotated without using a motion transmission mechanism, power loss is reduced. Further, the case 1 may be cylindrical, and the impeller F can be driven in a non-contact manner with the flow path closed, so that this energy conversion mechanism is not provided at any position in the flow path with a special seal on the movable part. Can be installed. Therefore, there is no concern about fluid leakage from the movable part. Further, since there is no fear of fluid leakage, it is possible to keep the fluid clean.

  In the present embodiment, the coil 2 is provided so as to face the side portion 1b of the annular recess 1a. However, the coil 2 may be provided so as to face the bottom portion 1c, and the side portion 1b and The coil 2 may be provided so as to be opposed to both the bottom portion 1c or only one of the side portions 1b. However, particularly when used as a generator, that is, when kinetic energy is converted into electrical energy, it is more efficient to provide the coil 2 so as to face not only the side 1b but also the bottom 1c.

  In this embodiment, the annular permanent magnet 5 is described as being integrally formed. However, a plurality of magnets may be bonded to form an annular shape. However, the magnetic poles should appear alternately. That is, in this case, the magnetic pole arrangement shown in FIG. 4 or the magnetic pole arrangement shown in FIG. 5 may be used. As a matter of course, in the magnetic pole arrangement as shown in FIG. 4, the coil 2 is provided to oppose the bottom of the annular recess 1a, and if the magnetic pole arrangement is as shown in FIG. When the electric energy is converted into the kinetic energy of the fluid, the coils 2 and 2 forming a pair are configured such that different magnetic poles are generated on the side facing the side portion 1b of the annular recess 1a.

  Furthermore, although the coil 2 is provided inside the case 1, it may be provided outside the case 1 as long as it can be opposed to the side 1b or the bottom of the annular recess 1a. Since the coil 2 is provided outside the case 1, the coil 2 is not disposed in the flow path P, and the coil 2 does not hinder the movement of the fluid in this respect as well. In the present embodiment, the coil 2 can be provided in the annular recess 1a if the lateral width of the annular recess 1a in FIG. 1 is increased or the depth is increased. In such a case, it is advantageous to install in the case 1 or outside the case 1 in that there are no adverse effects such as electric leakage and fluid contamination.

  Further, as for the case 1, the portion where the impeller F and the annular recess 1 a are provided is preferably a cylindrical shape from the viewpoint of flow path resistance, but may have other shapes.

  This is the end of the description of the embodiment of the present invention, but the scope of the present invention is of course not limited to the details shown or described.

It is a longitudinal cross-sectional view of the energy conversion mechanism in one embodiment. It is a perspective view of the side part in a cyclic | annular recessed part. It is a front view of the blade | wing of the energy conversion mechanism in one Embodiment. It is the figure which showed the magnetic pole arrangement | positioning of an annular permanent magnet. It is the figure which showed other magnetic pole arrangement | positioning of an annular permanent magnet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 1a Annular recessed part 1b Side part 2 Coil 3 Axis 4 Blade | wing 5 Annular permanent magnet 6 Ball bearing 7 Support body 8 Cylinder F Impeller P Flow path

Claims (7)

A flow path, an annular recess provided in the middle of the flow path, an impeller provided rotatably in the middle of the flow path, and a divided magnetic pole pattern provided on the outer periphery of the impeller and inserted into the annular recess. An energy conversion mechanism comprising: an annular permanent magnet having a plurality of coils facing the annular permanent magnet. The energy conversion mechanism according to claim 1, wherein unevenness is provided along a circumferential direction on a side portion on the downstream side of the annular recess. 3. The energy conversion mechanism according to claim 1, wherein the cross section of the flow path is circular, and the outer peripheral diameter of the impeller is substantially the same as the inner peripheral diameter of the flow path. The energy conversion mechanism according to any one of claims 1 to 3, wherein the coils are provided in pairs with the annular recess interposed therebetween. The energy conversion mechanism according to any one of claims 1 to 4, wherein the coil is provided so as to face the bottom of the annular recess. 6. The energy conversion mechanism according to claim 1, wherein the coil is provided outside the flow path. The energy conversion mechanism according to any one of claims 1 to 6, wherein the diameter of the flow path is increased as one end or both ends of the flow path are directed toward the end.

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