Prime-mover dynamo plants – Fluid-current motors
Patent
1985-12-26
1988-04-19
Roskoski, Bernard
Prime-mover dynamo plants
Fluid-current motors
290 53, F03B 1312
Patent
active
047391820
DESCRIPTION:
BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION
The present invention relate to a hydropneumatic water engine, in which a dual-acting piston pump operated by a constantly and slowly moving large body of water and which has an operating cylinder coupled to a pressure storage container from which the pressurized fluid is fed into an expansion chamber of a well-known flow machine, such as a turbine.
Since thousands of years water powered machines have been known, which used the energy of a flowing or of a falling surface water for the driving of different work machines, such as mills, water lifting machines, etc. There have also been apparatus and equipment known, in which the movement of the motion, that is the periodic change of the water level caused by the high and the low tides have been made use of.
The known types of contemporary hydroelectric machines embody the different types of water driven turbines. For driving the turbines one requires a higher pressure, i.e., a correspondingly high water flow velocity. There are hydroelectric stations known, in which the height of the waterfall, that is, the level difference between the high water and the low water marks is more than 200 meters. In order to attain the necessary height for the waterfall, that is, in order to have sufficient storage water available, dams are constructed at high cost.
SUMMARY AND OBJECTS OF THE INVENTION
The object of the present invention is to provide a water powered engine, which makes use of the energy of slowly moving large bodies of water and which is able to turn it into a work producing form.
The above object will be solved by a hydropneumatic water powered machine of the above-noted type, in which a weir is ankered in a reinforced bottom under a body of water and which, according to the invention, comprises at least one input opening of sufficiently large cross section and formed above the bottom and which can be closed by closing means and including a substantially vertical inner shaft which is communicated by the closing means with the high as well as with the low water levels. In each shaft, if there are more than one, there is a sufficiently heavily weighted floating body mounted for movement in the vertical direction within the shaft. The floating body is coupled by means of a longitudinal adjustable rod with a liquid pump of a dual-acting piston type communicating on its pressure side with the liquid chamber of a hydropneumatic pressure storage tank. The pressure storage tank contains above the pressurized liquid level compressed air which is being constantly pressurized by the liquid. The liquid space of the pressure storage tank is connected by a pressure conduit with the expansion chamber of a known flow machine, preferably of a turbine or a hydromotor, for a work producing expansion of the hydraulic pressurized liquid.
For the operational control of the water powered machine level sensors are provided for sensing the high and low water level and which according to the changes of the water level on both sides of the weir, control the closure members.
According to the present invention, the hydraulic pressurized fluid is contained in a closed cycle.
The operating cylinder which is in the form of a dual-acting piston pump, on its suction side is coupled by means of a suction conduit with the expansion chamber of a collector reservoir serving for the collection of the expanded pressurized fluid.
As a hydraulic pressurized liquid, one may consider the known hydraulic oils, or water which should be given an additive of an appropriate nature to improve its viscosity and to prevent its sudsing.
BRIEF DESCRIPTION OF THE DRAWING
The invention will become more readily apparent from the following description of a preferred embodiment thereof with reference to the accompanying drawing, in which:
FIG. 1 is a simplified schematic illustration of the operational connections of an exemplary embodiment of the water powered machine according to the present invention; and
FIG. 2 is a partial top view of a weir in which next to each oth
REFERENCES:
patent: 4208878 (1980-06-01), Rainey
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