If a small stream flows or a ditch is laid near the house or summer cottage, then the free energy of the water flow can be used to illuminate the room or power small current consumers. This does not require special knowledge and skills.
It will take
- profile square pipe;
- seal for PVC pipes 75 mm;
- PVC sheet;
- superglue 502 and liquid plastic;
- wooden bars and boards;
- rolling bearings;
- studs, bolts, nuts, washers and screws;
- toothed discs are different;
- flange bearings;
- electric motor;
- transmission chains, etc.
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Tools: pendulum saw for metal, welding machine, scissors, gas burner or hair dryer, drilling machine, drill, etc.
The process of manufacturing a mini-hydroelectric power station on a mountain stream or in a ditch
We cut blanks from a profile square pipe and make a frame using a semi-automatic welding machine. We assemble a seal for PVC pipes with a diameter of 75 mm.
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Using a cardboard template in the form of a half ring with an outer radius of 136 mm and an inner radius of 45 mm, we cut out six blanks for future blades for hydroturbines from a PVC sheet.
We heat the blanks with the flame of a gas burner or the heat of a hair dryer, give them the necessary hydrodynamic shape and glue three blanks in turn to the seal for PVC pipes at an angle along a spiral line.
We cover the gaps between the parts with liquid plastic.
We heat the blades again with a gas burner and give them their final shape. After waiting for them to cool and finally harden, we apply spray paint.
At the ends of the wooden block, we drill sockets for installing bearings and press them in there.
We close the top of the frame of square pipes with boards with the necessary cutouts and fix it with screws. To one pair of vertical racks from the outside in the transverse direction, we fasten a wooden bar strictly horizontally with bearings pressed into the ends.
We lay the frame on its side and insert the ends of the studs with fixed bladed impellers into the bearing holes. From above, we put on the second bar with bearings on the ends of the studs and fix the bar to the uprights.
We return the frame to its original position and put toothed disks of the estimated diameter and number of teeth on the studs. Rotating the studs on the threads of the disk nuts, we move them all the way into the bar.
We assemble a parallelepiped from short wooden bars. We drill a hole in it and fasten flange bearings on screws on both sides. After that, we glue the resulting knot to the board in the center so that their sides match.
Next to the parallelepiped, between two wooden blocks, we lay the electric motor and fix it to the board with a tape half-clamp with screws. In front, we place another bar transversely to the other two.
We place the axle with large and small sprockets in the holes of the flange bearings and connect the large sprocket to the sprocket on the motor shaft with a transmission chain. We also connect a small sprocket with two sprockets of bladed turbines with a transmission chain corresponding in length.
We place the resulting unit in a rectangular water stream, fix it with spacer bolts between the side walls of the channel. We connect LED lamps to the wires of the electric motor, which immediately flash brightly.
This is because the water flow rotates the blades of the turbines and the rotation is transmitted through a system of sprockets and transmission chains with a multiplicative effect to the rotor of the electric motor, as a result of which an electric current is generated that can be recorded with a multimeter.
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