The construction of the electrical generator, per se, is known to those of ordinary skill in the art. In FIG. 6A the support 18 is replaced with a four bar linkage 46 and the electrical generator, here in the form of a rotary generator, is moved outside of the stand 12 to a position between the four bar linkage 46 as shown using the linkages 42 and 44 similar to FIG.
- Ubica las piernas en alto contra la pared
- Dolor lumbar que se irradia a glúteos, muslos y región pelviana
- Piede diabetico
- The simplest WEC concept comprising of no contacting parts
6A except the four bar linkage 46 is replaced with a Peaucellier-Lipkin linkage 48, wherein the compound motion of the Peaucellier-Lipkin linkage 48 provides for an increased harvesting rate. Specifically, as the amplitude of the motion of the body 14 increases the motion of the rack 36 relative to the pinion 32 increases thus increasing the rotation rate of the pinion 32. The spring 24 can be replaced with torsional springs to maintain the rest position of the body 14. FIG. An alternative to this design is to have a single spring engaged at lower amplitudes and added springs become engaged at higher amplitudes. SUMMARY OF THE INVENTION This invention is directed to cost effective, efficient, fluid flow induced oscillating energy harvesters that overcome at least some of the drawbacks of the existing designs and which provide a cost effective, efficient approach to maximizing power output in fluid flow induced oscillating energy harvesters.
Dolor Neuropático Fisterra
It is an object of the present invention to address this deficiency in the prior art fluid flow induced oscillating energy harvesters. 2A and B, 3A and B and 4A and B form a representational image of the function of the support member 18. The electrical generator may be moving a magnet coupled to the support member 18 through coils or a rotational generator as known in the art.
Dolor Muscular Cadera
PRIOR ART REVIEW The prior art has disclosed a number of fluid responsive energy harvesting methods, both theoretical and practical, for similar applications such as disclosed in U.S. The support member 18 may take a number of forms and can include several elements, but can be generally described as the coupling between the moveable elements of the electrical generator and the oscillating bluff bodies 14. The schematic FIGS. Further FIG. 1 shows a pair of bodies 14 extending from the side of the stand 12, which may be more common arrangement while FIGS. A key feature of the present invention is that the bluff body 14 is pivotally mounted to the support member 18 via pivot member 20. Specifically, the fluid flow induced oscillating energy harvester 10 according to the invention provides that the bluff body 14 is pivotally mounted via pivot 20 to the support member 18 at a position off-center from the center of mass of the bluff body 14 as shown.
Tipos De Dolor De Espalda
One embodiment of the invention provides a fluid flow induced oscillating energy harvester including a stand supporting the energy harvester and configured to support the energy harvester in a fluid flow; a support member mounted for movement relative to the stand in a direction perpendicular to the direction of fluid flow; a bluff body configured to be positioned substantially perpendicular to the direction of fluid flow, wherein sufficient fluid flow causes an oscillating movement of the bluff body and the support member relative to the stand; an electrical generator coupled to the stand and to the support member, wherein the electrical generator is configured to convert oscillating movement of the bluff body and the support member to electrical power; and a support member spring supporting the support member for oscillation about a support member rest position, wherein the support member spring exhibits a higher stiffness at higher oscillation amplitudes of the bluff body and the support member.
One aspect of the present invention provides a fluid flow induced oscillating energy harvester including a stand supporting the energy harvester and configured to support the energy harvester in a fluid flow; a support member mounted for movement relative to the stand in a direction perpendicular to the direction of fluid flow; a bluff body configured to be positioned substantially perpendicular to the direction of fluid flow and pivotally mounted to the support member, wherein sufficient fluid flow causes an oscillating movement of the bluff body and the support member relative to the stand, and wherein the bluff body pivotally mounted to the support member at a position off-center from the center of mass of the bluff body; and an electrical generator coupled to the stand and to the support member, wherein the electrical generator is configured to convert oscillating movement of the bluff body and the support member to electrical power.
Dolor Neuropático Central
The fluid flow induced oscillating energy harvester 10 will have in one embodiment of the invention each bluff body 14 pivotally mounted to the support member for rotation through about a 40 degree range of motion. In the preferred embodiment each bluff body 14 is extending from the stand 12 in a cantilevered fashion as shown in FIG. Dolor en parte alta de la espalda . −20 degree range of motion relative to the bluff body 14’s rest position. The bluff body 14 is pivotally mounted to the support member 18 at a position down-stream from the center of mass of the bluff body 18 relative to the direction of fluid flow 16 as shown.
3A and B which illustrate that the fluid loading is a function of the net flow direction 17 of fluid over the surface of the bluff body 14. The net flow direction 17 depends on the flow velocity 16 and the velocity of the bluff body 14 perpendicular to the flow 16. The attack angle of the flow oscillates as the bluff body 14 oscillates. The toggling bluff body 14 concept provides the mounting the bluff body 14 so that it can oscillate about the point of pivot member 20 downstream of the center of mass of the bluff body 14. Testing has shown that the torsion spring is helpful to provide a restoring force to the bluff body rotation and improvements to oscillation robustness have been observed with toggle ranges of about ±20°.
There are many locations where a large mass of relatively shallow water flows in a constant and reliable manner under a relatively low pressure head, generally in areas of relatively flat terrain, which may not be suitable for efficiently driving a conventional water turbine. The electrical generator may be mounted within the stand 12, particularly for sub-fluid positioning, but may be located anywhere where it can obtain the necessary mechanical movement of the support member 18 and convert this to electrical energy. This toggling body 14 design provides higher harvesting (higher energy yields). 5 the compound motion of the four bar linkage 46 and the linkages 42 and 44 provides for increased harvesting yield. Furthermore, the device comprises an actuating means which allows a freely oscillating motion of the flap member and a drive unit for actuating the flap member when the valve of an oscillation amplitude of the flap member is less than a predetermined threshold value.
For example, some energy harvesters convert motion of ocean waves into electricity to be used by oceanographic monitoring sensors for autonomous operation. Often these locations are conveniently near large inland and some coastal cities, which are the major consumers of electric power. Dolor de espalda y de estomago . A power blade is pivotally secured to the distal end of the support arm, and constrained to pivot within a defined operating angle.
Dolor Espalda Media
Pat. No. 8,648,480. The ‘480 patent discloses an energy harvester configured to harness flow energy in a submerged platform having a support member located external to the housing and directly exposed to the fluid flow and lengthwise positioned in the direction of the fluid flow. Russian publication 02341679 discloses a fluid powered energy harvester that comprises a submerged hydrodynamic wing profile rotatably mounted on an axle and interacting with the flow of the flowing medium.
Tipos De Dolor Torácico
U.S. Pat. Nos. 7,884,490 and 7,633,175 disclose an energy harvester with a resonating blade exposed to a fluid flow. U.S. Pat. No. 7,989,973 discloses an energy harvester including a wing-shaped blade in the fluid flow in which a lift differential producing device in the blade produces a lift differential at the opposite sides of the blade and that device is switched so that one blade side or the other produces the greater lift for generating an oscillation in the moving blade. Pat. Nos. 8,432,057 and 7,863,768 and 7,839,007 and 7,696,634, all disclose mechanisms for creating undulating motion, such as for propulsion, and for harnessing the energy of moving fluid. U.S. Pat. No. 4,476,397 discloses an energy harvester utilizing a sail and a mast pivotably mounted to a support configured to provide power from a relatively large volume of fluid moving at a relatively low speed. Pat. Nos. 7,821,144, and 7,573,143, all disclose an energy harvester utilizing fluid-induced oscillations in which the harvester includes a flexible membrane in the fluid flow having at least two fixed ends.