JP2019073992A - Hydraulic power unit - Google Patents

Abstract

To convert flow velocity energy to turning force and to generate power by utilizing a long section of a straight part of an irrigation channel instead of generating power by utilizing one point of an irrigation channel although one point of an irrigation channel has been utilized or a number of similar generators have been installed in an irrigation channel to try to acquire power generation energy in a number of conventional irrigation channel power generation.SOLUTION: A hydraulic power unit includes: a cylindrical member; a rotating member including a rotating shaft disposed coaxially with a center axis of the cylindrical member, a spiral blade member provided in an outer periphery of the cylindrical member, and a conical cap member that is provided in lengthwise edges of the cylindrical member and is fixed to the rotating shaft; a bearing member for bearing the rotating shaft; and a power generator for transmitting rotary force of the rotating shaft. A low-specific-gravity member having a specific gravity smaller than water is disposed in an internal space of the cylindrical member and the internal space is filled with water, thus allowing the specific gravity of the rotating member to be identical to the specific gravity of water.SELECTED DRAWING: Figure 1

Description

The present invention relates to a small hydroelectric generator using a large amount of water but using a low gradient waterway.

Heretofore, small hydroelectric devices utilizing waterways generally use a water turbine, a spiral water turbine or a propeller inserted into running water to generate electric power or a low head to waterways to make use of the head.

Japanese Utility Model Publication No. 4-20288 14-14 1001 Japanese Patent Application Laid-Open No. 7-4336

Many conventional inventions for water channel power generation have attempted to obtain generated energy by using a single point of the water channel or installing a large number of similar generators in the same channel.
The present invention is not to generate power using one point of the water channel, but to convert the flow velocity energy into rotational force to generate power using the long section of the straight portion of the water channel.

The hydroelectric generator according to the present invention is provided at a cylindrical member, a rotary shaft coaxially arranged with the central axis of the cylindrical member, a spiral blade member provided on the outer periphery of the cylindrical member, and front and rear end portions of the cylindrical member. A rotating member having a conical cap member fixed to the rotating shaft, a bearing member for bearing the rotating shaft, and a power generating device to which the rotational force of the rotating shaft is transmitted; By arranging a low specific gravity member having a specific gravity lower than that of water and filling the water, the specific gravity of the rotating member is made equal to the specific gravity of water.

The device of the present invention has the following effects.
In the present invention, the specific gravity of the rotating portion including the drum and the spiral blade is made to be about the same as that of water by incorporating foam polystyrene or the like having small specific gravity into the drum and filling the space with water. Thus, the entire drum is in weightlessness in water.
Since the entire drum is submerged in water, the cross section of the running water in the canal narrows and has the effect of accelerating the flow velocity.
Further, by increasing the number of intermediate drums in accordance with the site, the section where the drums are in contact with the flowing water is increased, and more energy from the flowing water can be obtained.
Water is gradually introduced into the drum at the time of installation because the water inlet and outlet holes are opened, and when the drum is repaired, etc. It will be easier.

The front view of installation of the hydraulic power unit concerning the present invention in a canal. The top view of the hydraulic power unit of FIG. Sectional drawing of the hydraulic power unit of FIG. Drum sectional drawing of the hydraulic power unit of FIG. The drum perspective view of the hydraulic power unit of FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings.
The rotating member in the hydroelectric power generation apparatus of this embodiment is made of a weightless material (a low specific gravity member having a specific gravity lower than water) 15 such as expanded polystyrene with a metal shaft (rotational shaft) 10 as a center and a weightless drum (cylindrical) It becomes an integral structure comprising the member 13 and the spiral blade (helical blade member) 12.
When installing or repairing the structure (rotary member) in the waterway, it is not possible to temporarily stop the flowing water in the waterway, so that the structure can be reduced in weight to facilitate raising and lowering.
In order to solve the problem, the water inlet / outlet 17 can be provided to gradually raise and lower the water in the zero gravity drum 13 while taking it in and out.
A water flow resistance reduction cap (conical cap member) 11 is attached to the tip and end of the weightless drum 13 to prevent water turbulence and to prevent a decrease in flow velocity.
By making the weight of the structure equal to the volume of the foam, the specific gravity of the structure in water is approximately 1.0, and the flowing water can be smoothly converted to the rotational force. Since the gravity adjustment of gravity-free drum 13 uses a solid and light material 15 such as polystyrene foam, division with water in drum 13 becomes unnecessary, water can freely enter and exit from the water inlet and outlet, and weight-free drum 13 is installed. It becomes easy to repair.
By adding the intermediate drum (cylindrical member) 8, the straight portion of the water channel can be used for a long time, and a large amount of electrical energy can be obtained.

Since the drum can be installed under the water surface of the canal and the energy possessed by the running water can be taken out over a long section by the spiral blade, it is possible to obtain more electric energy than the current general devices.

DESCRIPTION OF SYMBOLS 1 Flow water 2 Water channel 3 Water surface 4 Mounting part 5 Generator 6 Speed-up machine 7 Tip drum 8 Intermediate drum 9 End drum 10 Metal shaft 11 Water flow resistance reduction cap 12 Spiral blade 13 Zero gravity drum 14 Universal joint 15 Styrofoam 16 Water inside drum 17 Water entrance

Claims (1)

A cylindrical member, a rotary shaft coaxially arranged with the central axis of the cylindrical member, a spiral blade member provided on the outer periphery of the cylindrical member, and the front and rear end portions of the cylindrical member fixed to the rotary shaft Specific gravity relative to water in the internal space of the rotating member, and a rotating member having a conical cap member, a bearing member bearing the rotating shaft, and a power generating device to which the rotating force of the rotating shaft is transmitted A hydroelectric power generator characterized in that the specific gravity of the rotating member is made equal to the specific gravity of water by disposing a low specific gravity member having a low specific gravity and filling the water.