US4412417A – Wave Energy Converter – Google Patents

Phantom lines 26 serve to illustrate the fact that helix 20 could be continued an additional length equal to one half its pitch in order to meet the adjacent end of helix 22. In addition to being axially spaced by a distance equal to one-half the pitch, the helices are angularly displaced with respect to one another by one-half a revolution, or 180°, about axis 12. As embodied herein, each helix has a length equal to its pitch. FIG. 3 illustrates a first embodiment of the buoyant mass of the present invention, comprising two helical volumes, axially separated from one another.

  1. Debilidad en un lado del cuerpo
  2. Jugo de avena, plátano y miel
  3. FIG. 12A depicts still another embodiment of a resonating electrical generator
  4. Mareos y vértigos
  5. Come suficientes frutas
  6. Comité de Coordinación de los Grupos de Estudio
  7. Refinements to the structure and flexible sheet to improve performance

The contiguous portions 40′ and 42′ of the helices, rather than being positioned axially adjacent one another, overlap each other in the radial direction. Experiments and calculations indicate that the most favorable power extraction characteristics can be obtained if the pitch of each elementary helix making up the whole structure is made close to the wavelengths of the incoming waves, and the outer radius R is of the order of magnitude of the wave amplitude. 10. More importantly, due to the unique stability of the apparatus of the present invention, the rotational masses 60 associated with each embodiment can be freely floated on the surface of the body of water, eliminating the need for bearings and associated means for securing the apparatus in a horizontal position by means of rigid structures or taut cables affixed to the sea floor.

Dolores Musculares Causas

Thus, the composite center of buoyancy will always be on the same vertical line as the center of gravity G. Therefore, when freely floating in still water, the rotational mass shown in FIG. As the helix is rotated in the water, the angle between the axis and the surface changes. Finally, the horizontal distance between H1 and H’1, and between H2 and H’2, has to be chosen so that, in addition to the previous design constraints, the resultant combination of the four helices will still be a continuous surface without gaps between each helix.

In other words, it can be rotated without producing any resisting torques. 6-7, two helical lines from one pair, such as H1 and H’1, or H2 or H’2, must be displaced from each other by a rotation of half a revolution, and an axial translation. Dolor de estomago y espalda alta . The helix will then rotate by itself until it finds the other stable equilibrium position. 3, having center of gravity G, and helix 22 rotated one-half revolution with respect to helix 20, the centers of buoyancy of the respective helices will be at equal distances on opposite sides of the center of gravity for every angle of rotation. For maximum torque in waves, the width of each strip has to be chosen so that the four strips will cover one-half circumference of the cylinder at the midsection of the surface thereof.

Dolores Musculares Piernas

In this embodiment, however, the corresponding ends of the respective helices are spaced an axial distance of one-half pitch from one another. If each pair of helices is in equilibrium at every angle of rotation, structures obtained from combinations of pairs will also have this property. As each strip is rolled one full turn around an imaginary cylinder of radius R, as shown in FIG. In FIG. 8, each very narrow helix is represented by a line H1, H2, etc. FIG. 6 shows a combination of two pairs of helical strips, the first pair corresponding to the helices H1 and H’1, the second pair H2 and H’2.

It is evident from the above descriptions, that the arrangements of FIGS.

Knowledge of the wave field conditions at the site of settlement of the rotor is necessary to the optimization of λ and R. These two parameters completely define the design of the embodiments of FIGS. 2A-2H, for two positions of a single helix, half a revolution apart, the projections of the center of buoyancy on the axis will be found at two symmetrically opposite positions with respect to the center of gravity. It is evident from the above descriptions, that the arrangements of FIGS. Most known systems for harnessing the energy from waves comprise floating structures which are set in motion by the movement of the liquid surface. The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to explain the principles of the invention.

The invention consists in the novel construction and arrangements as shown and described herein. The opposing torques applied to conversion means 64 cancel one another, thereby maintaining conversion means 64 in a relatively stable rotational position. An energy conversion means, such as a generator, is linked to the rotating helical mass, and may be used to convert the rotational motion to another form of energy.