The selective ballasting mechanism is additionally useful for changing the buoyancy of the movable member in response to changing conditions, e.g., changes in system buoyancy caused by marine growth on the apparatus. As noted, the column 24 is mounted by a universal joint on the anchor base 20 allowing pivoting or tilting of the column in response to circular water movements caused by overpassing surface waves. As previously mentioned, and described more fully in the afore-cited patent applications, overpassing surface waves induce pressure variations between the top and bottom ends of the tube 10. Such pressure variations appear across the closed end of the tube between the water within the tube and the surrounding water, and the tube 10 is driven up or down depending upon such pressure variations. As previously noted, the tube 10 is disposed in generally upright and preferably completely submerged orientation. As mentioned, the float 16 is rigidly secured to the anchor base 20 by the tubular column 24. The tube 10 is also mounted on the column 24, but slidably therealong by means of bearings 34 encircling the column 24 and disposed above and below the float 16. In Fig.
Dolor Espalda Media
According to another aspect of the invention, there is provided an apparatus for use in a body of water for capturing energy from surface waves on said water body within a range of amplitudes up to a preselected maximum amplitude, the apparatus comprising a first member being reciprocally movable as a function of and in response to overpassing waves, relative to a second member and along a path the length of which is a function of the amplitudes of said overpassing waves; and said second member including buoyancy varying means for decreasing the buoyancy of said second member for causing said second member to tilt away from the vertical in response to the overpassage of surface waves having a preselected amplitude in excess of said preselected maximum amplitude and including a base member for anchoring the apparatus to the floor of the body of water, and said second member being pivotally mounted on said base member for allowing said second member to extend vertically upward from said base member when said second member is positively buoyant, and for allowing tilting of said second member when said second member is negatively buoyant.
Tipos De Dolor Dental
The member is also secured to a mechanical energy transducer, e.g., an hydraulic cylinder, for converting vertical movements of the member, in response to over-passing surface waves, to useful energy. Such higher pressures, e.g., in the range of 1000 to 2500 psi, are effective (as generally known) for increasing the efficiency of operation of the hydraulic motor and the electrical generator driven by the hydraulic motor. At such site, the pontoons are gradually flooded for a gentle sinking of the base 20 to the ocean bottom; the apparatus automatically assuming the desired vertical orientation. In Fig. 2, a tank 80 is shown (one half thereof being cut away for illustrative purposes) at the top of the tube 10, and an in-line series of separate tanks 82 are shown surrounding the column 24 inside the tube 10. A purpose of buoyancy tanks 80 and 82 is that, when surface storms are excessively severe, the buoyancy tanks are flooded to cause sinking of the tube and the float.
Dolor De Cabeza
Because the column 24 supporting the tube and float is secured to the skid base 20 by a universal joint; such “sinking” is accomplished by a tilting of the column for bringing the top end of the system to a safe depth well below the surface wave high energy zone. 1. Ejercicios para dolor de espalda en el embarazo . The apparatus can then be towed, in horizontal floating orientation, by a surface vessel for transport and deployment at a selected ocean site. Such support can be a rigid structure mounted on the water bed, but is preferably a float 16 secured to an anchor base 20 anchored to the water body floor by the weight of the anchor base 20 plus that of anchoring chains 21, as hereinafter described. A further advantage of the use of the lever 50 mechanism for magnifying the amplitude of the forces transmitted to the hydraulic cylinder is that greater hydraulic pressures can be generated.
This better accommodates typical ocean conditions where the tube movements can vary over a relatively large range while requiring only a shorter range of travel of the cylinder piston 44. One advantage of this is that shorter, hence generally less expensive, hydraulic cylinders can be used. Thus, while the column 24 is firmly attached to the anchor base 20, the column can pivot by as much as 900 from the vertical and in any compass direction. Thus, the top of a long fully submerged tube experiences relatively large pressure variations while the bottom of the tube experiences an almost steady pressure essentially unaffected by the passing surface waves. With the tube 10, shown herein, having a closed top end, the surface wave induced pressure variations cause the tube 10 to vertically oscillate. With overpassing waves of increasing amplitude in excess of the safe operating range of the system, the shock absorbing assemblies 62a and 62b are driven into contact with the striker bar 60, thus braking and stopping further float movements.
80 and 82. The mast preferably includes an air pipe for pumping air through the mast and into storage tanks for the ballast tanks. Repeated operation requires both power and a source of air. The elastic blocks 66, suitably assembled together between pairs of frames such as shown as frames 72 and 74 in Fig.
Dolor Sordo Significado
With waves in excess of such maximum amplitude, and generally of such huge forces as could cause damage to the movable portions of the system, the anchor base is of sufficiently small mass as to be completely lifted off the ocean floor to take-up otherwise excessive vertical forces. With further increases of wave amplitude and further forces on the tube 10, the violent impact of the tube top end 12 with the upper buffer system overcomes the weight of the anchor base 20 thereby lifting it off the ocean floor (but not freeing it from its anchors 60). Lifting the anchor base 20 is also an energy absorbing means , thereby further protecting the system. During normal operation, i.e., with anticipated water levels and wave amplitudes, the system will rest on the ocean floor in generally fixed, vertical orientation with the top, closed end 12 of the tube 20 at a preselected depth below the mean water level for optimum collection of energy from the waves then most prevalent.
- Incrementar el riego sanguíneo
- Interrumpen las actividades de la vida diaria
- Dolor de espalda (cervical)
- Realizar ejercicio físico habitualmente, puede ser caminar, correr, nadar, lo que más te guste
- Alteración del movimiento activo
2, the stroke buffering mechanism comprises a rigid striker bar 60, e.g., a metal bar, rigidly and fixedly secured to an upper portion of the column 24. Mounted on the tube 10, for movement therewith relative to the fixed striker bar 60, are two shock absorbing assemblies 62a and 62b disposed respectively above and below the striker bar 60. The two assemblies 62a and 62b are rigidly mounted within a support frame assembly 64 comprising a number of interconnected strut members forming a rigid cage rigidly secured to the inside of the tube 10. The absorbing, or stroke-buffering elements of the assemblies 62a and 62b are two pairs of rectangular blocks 68 of an elastic material having known stress-strain characteristics and providing known elastic resistance against impact energy. Because the column tilting can occur in any direction, the cylinder 46a is mounted for accommodating such movements. Such horizontal displacements of the float will generally occur at a slow rate and, essentially, the function of the float 16 is to provide a fixedly positioned support for the tube 10. The selection of the positioning of the tube 10 and the float relative to the mean water level of the body of water is described in the aforecited patent applications.