1 at a sequence of angular positions during rotation of the buoyant mass having its axis fixed to remain horizontal in still water. The distance between the two end sections of a helix will be called the length of the helix. The two helices, each having a length equal to the pitch, are rotationally displaced with respect to one another by one-half revolution, or 180°. Thus, as for the embodiment of FIG. 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.
- Concepto de dolor crónico oncológico
- Duja: como el gianduja
- Nuevos regímenes de ejercicios o actividades recreativas que causen esfuerzo físico
- Profesor formaciones postgrado especializado en neurodinámica
- Reducción del dolor neuropático
- Hombros que lucen desalineados
- Tabaquismo, etc
As the helical mass rotates about its axis, the center of buoyancy will oscillate between positions lying axially on each side of the center of gravity. If the simple helix is allowed to float freely and assume one of its positions of stable equilibrium having its axis tilted with respect to the surface of the water, it will be necessary to apply a substantial torque to the helix to move it rotationally from its equilibrium position. As wave motion progresses along the axis of the helix, the buoyant forces acting on successive sections of the helix impart rotation to the buoyant mass. The relative linear motion of the surface waves imparts buoyant forces to successive portions of the helical mass 11, imparting rotation to the mass, thereby turning the axle or axis 12 in its bearings. FIGS. 2A-2H illustrate the forces acting upon a buoyant helical mass when fixed in a horizontal position in still water at successive stages in its revolution, at varying angles of rotation, α, except for the reaction forces of the bearings.
FIGS. 10-14 illustrate various arrangements of the rotational buoyant mass of the present invention with means for converting the rotation thereof into another form of usable energy. The configuration of the mass is such that the center of buoyancy of the rotational mass remains in a fixed axial location for all angles of rotation of the mass. DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to fully understand and appreciate the present invention, it will be of great assistance to first analyze the operation of the energy conversion apparatus of the prior art. 11-14 are more readily and economically sited in a body of water, or relocated from one site to another, than the rigidly mounted energy conversion apparatus depicted in FIG. The helix will then rotate by itself until it finds the other stable equilibrium position. Consequently, the position of the buoyant force FB continually shifts with respect to the position at which the gravitational force W is applied to the helical volume.
Dolor Sordo Costado Derecho
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. As each strip is rolled one full turn around an imaginary cylinder of radius R, as shown in FIG. 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. Thus, it is intended that the present invention cover any such modifications and variations provided they come within the scope of the appended claims and their equivalents. Como quitar el dolor de la pierna . Consequently, the vertical distance between the ends of two strips of the same pair, once unrolled in the plane of the figure, must be one half the circumference of the imaginary cylinder they were rolled around, i.e., πR.
Dolor Espalda Pecho
1 is an illustration of a wave energy conversion apparatus of the prior art. 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. The mass and axis are suitably linked to a power conversion means such as that shown in FIG. In FIG. 12, rotational buoyant masses 60 and 60′ are coupled to opposite sides of energy conversion means 64. The entire apparatus is moored by means of cables 70. The rotational buoyant masses 60 and 60′ are adapted to rotate in opposite directions in response to wave action in a given axial direction. Consequently, the need to fix the axis of the rotational mass by means of bearings anchored to the marine bed is obviated.