5, in the closing area surrounded by wire coil, about two/part has magnetic flux to pass through, and its Karman vortex street effect under occur above and below vibrate deformation when, the wire coil 5 for being wrapped in elastic swirl generating body 4 will be caused to be partially away from magnetic field, subsequently into magnetic field, cyclically-varying, so that when the relative motion of cutting magnetic line occurs in magnetic field for closure wire coil, by closing the magnetic flux of wire coil, generating period changes therewith, so as to constantly produce the induced-current of exchange. Karman vortex street generator of the present invention in housing by setting a vortex shedder, the Karman vortex street of the out-of-date generation of fluid stream causes the vibration of swirl generating body, so as to drive or cause the closure wire coil being in magnetic field to move together, due to the regularity vibration of Karman vortex street, make the magnetic flux generating period change through closing coil, so as to produce alternating current in wire coil, the kinetic energy that Karman vortex street vibrates is changed into electric energy, to propose a kind of new way into electric energy using liquid turns.
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1, the N poles of permanent magnet 3 and the S of permanent magnet 6 are extremely corresponding, and form magnetic field in permanent magnet 3 and the middle of permanent magnet 6；The magnetic field upper end is provided with Elastic Cylindrical swirl generating body, and the left and right ends of the Elastic Cylindrical swirl generating body 4 are stuck on two corresponding surface housings 1 of left and right.When fluid is by elastic swirl generating body, when producing vibration on the vertical direction of fluid flow direction, elastic swirl generating body can occur in magnetic field above and below cyclic deformation.The outer surface of the elastic swirl generating body 4 is uniformly tied with wire coil 5, and the two-terminal of wire coil 5 is drawn from the aperture 11 on housing 1.To ensure not influenceing the proper flow direction of fluid, it is tied with The outer surface of the elastic swirl generating body 4 of wire coil 5 should try one’s best smoothly.
9 is Figure 10 F-F’ to sectional view）From unlike first two, longitudinal middle point in the Karman vortex street generator of the third embodiment of the invention, housing 1 is provided with the swirl generating body 4 of rectangular in cross-section, the upper lower wall at the rear of swirl generating body 4 and is respectively arranged with permanent magnet（3,6), permanent magnet（3,6) centre is provided with rotatable wire coil 5, it is connected by rotary shaft 10 with housing 1 and it is fixed in the magnetic field, and rotary shaft 10 is riveted on the left and right correspondence both sides of housing 1, and on the horizontal middle section of swirl generating body.Wherein, the permanent magnet is more than or equal to 2 with the swirl generating body along the distance on arrival end fluid flow direction, with ensure the wire coil in the magnetic field be in stable, paired, being alternately arranged, direction of rotation it is opposite, constant spacing, using laminar flow as the Karman vortex street of core in.
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Fig. 2, or other blunt forms；The permanent magnet can also be arranged on the left and right corresponding surface of housing in addition to being set shown in Fig. 6, Fig. 7 schematic cross-sectional view and Fig. Fig. 2 gives longitudinal schematic cross-sectional view of the Karman vortex street generator of the first embodiment of the invention（That is Fig. 2 along housing bottom along housing tip.The elastic swirl generating body is located at away from arrival end not less than at 2L distances, so as to ensure that the passage between arrival end to swirl generating body can play a part of water conservancy diversion, makes to keep uniform to flow, steadily, after swirl generating body, produces Karman vortex street.Wherein Z represents the projected length size of the characteristic length of swirl generating body, the i.e. 〃 is the height of housing cavity in formula, Z is the characteristic length of swirl generating body, so as to ensure when elastic swirl generating body is being deformed upon in the presence of Karman vortex street, the motion of cutting magnetic line occurs therewith for the wire coil above it, ensure that its magnetic flux changes therewith, so as to produce induced-current.Except wire coil 5 as shown in Figure 4 can with uniform winding on the outer surface of elastic swirl generating body in addition to, when elastic swirl generating body 4 is column, thin wall hollow, open at both ends, wire coil 5 can also be uniformly embedded on the inner surface of elastic swirl generating body, so as to avoid winding outer surface from making its outer surface not smooth enough and the influence of fluid flow.
The mentality of designing of the present invention：A wire coil is disposed in magnetic field, the motion of cutting magnetic line is done in magnetic field when closing wire coil, and allows projected area of the wire coil in magnetic line of force direction to produce change, even if the magnetic flux through coil produces change.According to the law of electromagnetic induction, electric current will be produced in the wire coil of closure.According to this thinking, if this periodic, alternating direction the power acted on swirl generating body of the Karman vortex street in background technology is passed to a wire coil being placed in fixed magnetic field, wire coil can be made to produce vibration, as long as ensureing that this periodic vibration changes the magnetic flux through wire coil, then alternating current will be generated in wire coil.
90 ° angles by axle of fluid flow direction uses, when such as rotating 90 °, The vibration of Karman vortex street generator wire coil of the present invention is not influenceed by swirl generating body and wire coil gravity.Above-mentioned embodiment is only schematically illustrating for technical solution of the present invention; the invention is not limited in above-mentioned embodiment; the present invention can also be deformed in its shape or structure, and the Karman vortex street vibration that every utilization swirl generating body is produced causes other deformations of the TRT of wire coil periodic vibration generation inductance current to all fall within the scope of the present invention. 5 schematic diagram, when the device is placed in the fluid of certain orientation, for example in wind field, or move the device certain speed, then fluid can enter housing 1 by arrival end 2, by that will produce Karman vortex street in portion behind during elastic swirl generating body 4, because the swirl generating body 4 in the present embodiment is elastic swirl generating body, then Karman vortex street can cause elastic swirl generating body 4 to be deformed upon along to flow in vertical direction, so as to drive wire coil 5 in permanent magnet（3,6) regular cutting magnetic line in the magnetic field in the middle of；Because elastic swirl generating body 4 is located at permanent magnet（3, 6) in the magnetic field in the middle of in the horizontal direction of upper end, therefore, in the case of dead-beat, magnetic flux through wire coil 5 is fixed, such as Fig.
7, shown in 8）, so as to ensure not influenceing flowing of the fluid on swirl generating body as spring；Supported above and below flexibility（8,9) in addition to using spring, can also have good elastic material, such as rubber, rubber band etc. In the above-mentioned technical solutions, the elastic swirl generating body is made up of elastic polymer material, such as rubber, rubber etc., the shape of swirl generating body can also be the cylindricality that cross section is rectangle, rhombus, trapezoidal etc. Dolor lumbar biodescodificacion . 2) wherein ,/be vortex shedding frequence, its dependent variable is as previously described.Strouhal numbers are generally fixed value 0. 21.Thus flow velocity can be obtained by measuring vortex shedding frequencies.Widely used Karman vortex street flowmeter is exactly to be made around this principle. In the Karman vortex street at swirl generating body rear, vortex can backward be moved along direction of flow.Simultaneously because the presence of the circular rector of single vortex, this whirlpool can be by one with flowing the active force in vertical direction, i.e.
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Longitudinal schematic cross-sectional view of the Karman vortex street generator of the third embodiment of Fig. 6 is Fig. 7 D-D’ to sectional view）From unlike the first Karman vortex street generator embodiment, swirl generating body 4 in the Karman vortex street generator of present embodiment is different from the connected mode of housing 1, and swirl generating body 4 is adapted to conform with rigid bluff in present embodiment（I.e.