JPH0742930B2 - Haikawa flow hydroelectric generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a Haikawa flow hydroelectric generator that generates electric power by utilizing a low head of water.

(Prior Art) Conventionally, a water turbine for turbine power generation is called a water turbine, and the shaft of the water turbine is directly connected to a generator to rotate the generator, and the head thereof ranges from several tens of meters to 1,700 m. It is also known that the output of one turbine is about 200,000 kW.

By the way, the alternator for turbine power generation is set at 300 rpm in Japan. The frequency of East Japan is 50Hz, the frequency of West Japan is 60Hz, and the least common multiple of these is 300.

In this way, there are many hydroelectric power plants along the river in large rivers in Japan, such as Kurobe River, Tenryu River, Shinano River, etc. For example, the Kurobe Dam has a large head of about 100 m, and for this reason a huge dam is being constructed.

In this way, the conventional turbine generator builds a huge dam,
Although the head is increased and the turbine generator is set to 300 rpm, the dam construction requires several years of construction period and huge construction cost.

On the other hand, for example, Japanese Patent Laid-Open Nos. 59-183080 and 58
There is also known a water turbine generator that does not use a dam as described in Japanese Patent Publication No. 117363. JP-A-59-183080 discloses a water turbine moored in a river to generate electricity.
At that time, for example, a pair of turbines are respectively mounted between four floats to form two rows of turbines, and the rotation of the main shafts of the turbines of both rows is converted into one speed increasing device through a sprocket and a chain. The transmission is further transmitted from the speed increasing device to one generator via the chain wheel and the chain. The turbines in both rows, that is, the upstream row and the downstream row, are coaxially arranged.

However, in the hydroelectric generator described in JP-A-59-183080, since the water turbine is provided on the float, only the upper part of the water stream acts on the water turbine, and the energy of the water stream cannot be used efficiently. Moreover, since the rotation of all turbines is transmitted to one generator, the efficiency is poor. Further, since the chain wheel and the chain are used for transmission, the efficiency is poor and the reliability is low. On the other hand, it is conceivable that the gear type speed increasing devices connected to the respective generators are directly connected to both ends of the main shaft of each water turbine, but if a plurality of water turbines are arranged coaxially, The length of the turbine is shortened due to the speed-increasing device and the generator, resulting in a large loss in obtaining electric power.

Further, in Japanese Patent Laid-Open No. 56-154166, a plurality of main shafts are arranged side by side in the water flow direction between a pair of machine frames arranged with one inclined water channel interposed therebetween, and a plurality of water turbines are provided on each main shaft. Machine is proposed. The adjacent main shafts are separated from each other by a radius of the turbine or more, and the adjacent main shafts are arranged such that the turbines are displaced from each other by an axial length or more. That is, the plurality of water wheels are arranged in a staggered pattern as a whole. In addition, the rotation of all turbines is transmitted to one generator.

However, in the hydroelectric generator described in JP-A-56-154166, since a plurality of water turbines are arranged in a staggered pattern, it becomes unnecessarily large.

(Problems to be Solved by the Invention) As described above, although there are conventional hydraulic power generators using a plurality of water turbines, in the one described in JP-A-59-183080, the plurality of water turbines are orthogonal to the water flow. When arranging the turbines in the same direction, a plurality of turbines were arranged coaxially, so if the speed-increasing devices to the generator were directly connected to both ends of the main shaft of each turbine, the length of the turbine would be shortened and electricity would be obtained. However, there arises a problem that the loss becomes large. Further, as described in JP-A-56-154166, a hydroelectric generator in which a plurality of water wheels are arranged in a staggered manner has been proposed, but this causes a problem that the entire hydroelectric generator becomes unnecessarily large. .

The present invention has been made in consideration of the above circumstances, and in a Haikawa flow hydroelectric generator in which a plurality of water turbines are arranged in a direction orthogonal to the water flow, the efficiency is increased, and a large amount of power generation can be obtained with little loss. , It is intended to make the whole compact.

[Structure of Invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a base, a plurality of water wheels rotatably supported by the base, and input shafts at both ends of the main shafts of the plurality of water wheels. Is provided with a gear-type speed-increasing device directly connected to each other, and a generator in which a drive shaft is connected to each output shaft of these speed-increasing devices. And a plurality of water channels each having a width slightly larger than the axial length of the turbine, and the plurality of turbines have their main axes substantially orthogonal to the water flow, and each of the bases. Each one is located in the canal, and the outer circumference is located close to the bottom surface in the canal.Adjacent turbines are offset from each other within the radius of the turbine in the direction of the water flow. Speed The device and the generator are arranged side by side on the base in the direction of the water flow.

(Operation) In the Kaikawa flow hydroelectric generator of the present invention, the water flow passes through a plurality of water channels arranged in a direction substantially orthogonal to the water flow, and the water turbines respectively located in the respective water channels receive the water flow and rotate, respectively, and the main shaft of each water wheel is rotated. Is transmitted to a generator via a gear type speed increasing device which is directly connected to both ends thereof to generate electricity.
As mentioned above, the speed increasing device and the generator are respectively connected to both ends of the main shaft of each turbine, but the adjacent turbines have their main shafts displaced from each other in the direction of the water flow, and the speed increase connected to the adjacent turbines is increased. Since the device and the generator are aligned in the direction of the water flow, it is possible to increase the length of the water turbine. Moreover, since each of the water wheels is located in the water channel with only a small gap, almost all of the water flow acts on the water wheel.

(Embodiment) FIGS. 1 to 4 show an embodiment of the present invention in which a plurality of turbine generators G are arranged in parallel in the width direction of a river. This turbine generator G has a concrete base 5 of the turbine generator G on the river bottom 10.
In addition to the above, the concrete base 4 of the generator 2 to be described later is provided on the concrete base 5 so as to project to the water surface 11. The concrete bases 4 are provided at predetermined intervals, and water channels 4A are formed between the concrete bases 4 and open in the direction of the water flow 3 and upward. These water channels 4A are lined up as an example in a direction substantially orthogonal to the water flow 3. In addition, one side wall 20 of the concrete base 5 has a boat 21.
A sluice gate 22 will be installed. 1 is a river embankment or coast.

Further, the main shaft 8 of the water turbine W is mounted on the concrete base 4. The main shaft 8 is located above the water surface 11, has a direction that is substantially orthogonal to the water flow 3, and has an end portion erected on a concrete water turbine column 9 that is erected on the concrete base 4. Then, a plurality of turbine blades 7 are radially fixed to the main shaft 8. The water turbine blades 7 are mounted by radially mounting the support steel frames 6 on the main shaft 8 and fixing the water turbine blades 7 to the support steel frames 6. The width of the water wheel W is slightly smaller than the width of the water channel 4A, and the water wheels W are positioned one by one in each water channel 4A with a small gap. The outer circumference of the water wheel W is also located close to the bottom surface in the water channel 4A.

Both ends of the main shaft 8 are bearings 12 provided on the water turbine column 9.
And is directly connected to the input shaft 13a of the speed increasing device I. This speed increasing device I has a case 15 in which a plurality of stages of gear groups 13 in which a gear shaft 16 is supported by a bearing 14 is built in, and an output shaft
19 is connected to the drive shaft 17 of the generator 2.

The plurality of water wheels W are arranged in a direction substantially orthogonal to the water flow 3, but the adjacent water wheels W are connected to the adjacent water wheel W because the main shafts 8 of the adjacent water wheels W are displaced from each other by a radius of the water wheel W or less in the direction of the water flow 3. The speed increasing device I and the generator 2 are arranged side by side in the direction of the water flow 3 on the concrete base 4.

Then, the electricity generated by the generator 2 is transmitted by the electric wire 24 installed on the electric pole 23.

Therefore, when the water turbine blade 7 is rotated by the relatively slow water flow 3 passing through each water channel 4A, this rotational force is transmitted to the main shaft 8. The rotation of the main shaft 8 is output after the rotation speed is increased by the speed increasing device I, and the drive shaft 17 of the generator 2 is rotated to generate electric power.

In this way, the electric power generated by the individual turbine generators G is combined and transmitted by the electric wire 24.

As described above, by connecting the main shaft 8 and the drive shaft 17 via the speed increasing device I, for example, the main shaft 8 rotating at 50 revolutions per minute can obtain the rotation of the drive shaft 17 at 300 revolutions per minute and the power generation can be performed well. In addition, by arranging the turbine generators G side by side, it is possible to obtain a huge amount of electricity by combining the amounts of electricity generated by the individual turbine generators G.

Moreover, the speed increasing device I is provided at each end of the main shaft 8 of each water turbine W.
Since the generator 2 is connected with the generator 2, high efficiency can be obtained, but the main shafts 8 of the adjacent turbines W are displaced from each other in the direction of the water flow 3, and the speed increasing device I connected to the adjacent turbine W is connected to each other.
Since the generators 2 are lined up in the direction of the water flow 3, the length of the water turbine W can be increased. Furthermore, each water wheel W is a waterway
Almost all of the water flow 3 acts on the water wheel W because it is located in 4A with only a small gap maintained. Therefore, a large amount of power generation can be obtained with little loss.

Further, since the plurality of water wheels W are arranged in a line and are displaced from each other by less than the radius of the water wheels W in the direction of the water flow 3, the entire hydraulic power generator can be downsized.

In addition, although the case of the river is shown in the above-mentioned embodiment, the turbine generators G are installed in a horizontal row in parallel in a sea inlet or a breakwater.
There are various modifications such that the turbine blade 7 may be rotated to generate electricity by utilizing the ebb and flow of the tide.

〔The invention's effect〕

According to the present invention, in a hydraulic power generator in which a plurality of turbines are arranged in a direction substantially orthogonal to the water flow, the generators are connected to both ends of the main shaft of the turbine via gear type speed increasing devices, respectively, so that the efficiency is improved. The turbines of the turbines that are raised and adjacent to each other have their main shafts displaced from each other in the direction of the water flow, and the speed increasing device and the generator connected to the adjacent water turbines are arranged side by side in the direction of the water flow on the base. Even though the speed increasing device and the generator are connected to both ends of the water turbine, the water turbine can be made longer and the efficiency can be further improved. Furthermore, the water channels formed in the base are slightly smaller than this water channel. Since the turbines are located one by one, and the outer circumference of this turbine is located close to the bottom of the waterway, almost all of the water flow acts on the turbine, further improving efficiency and obtaining large power generation with less loss. Be . Further, since the plurality of water turbines are arranged in a line and are displaced from each other by less than the radius of the water turbine in the direction of the water flow, the entire hydroelectric generator can be downsized.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention.
Figure is a plan view, Figure 2 is a side view of a water turbine, and Figure 3 is a perspective view.
FIG. 4 is a vertical sectional view. 2 ... Generator, 3 ... Water flow, 4,5 ... Concrete base (base), 4A ... Waterway, 13a ... Input shaft, 8 ... Main shaft, 17 ... Drive shaft, 19 ... Output shaft, W ... water wheel, I ...
Gearbox

Claims (1)

[Claims] 1. A base, a plurality of water wheels rotatably supported by the base, and a gear type speed increasing device in which input shafts are directly connected to both ends of main shafts of the plurality of water wheels, respectively.
The output shafts of these speed increasing devices each include a generator to which a drive shaft is connected, and a plurality of water channels that are opened in the direction of water flow and upward in the base are formed in a line in a direction substantially orthogonal to the water flow, and The width of each water channel is made slightly larger than the axial length of the turbine, and the plurality of turbines have their main axes substantially orthogonal to the water flow,
Each one is located in each water channel of the base, and the outer circumference is located close to the bottom surface in the water channel.Adjacent water turbines have their spindles displaced from each other within the radius of the water wheel in the direction of the water flow, so that they are adjacent to each other. The Kaikawa flow hydroelectric power generation device, wherein the connected speed increasing device and the generator are arranged side by side on the base in the direction of the water flow.