JPH0343674A - Cross flow water wheel generating device - Google Patents

Abstract

PURPOSE:To efficiently take out the output of a water wheel by standing upright a casing enclosing a runner connected to a water wheel shaft and guiding water, and providing a draft tube having draft effect which is connected to the casing and inserted into a tailrace. CONSTITUTION:When a gate 19 is opened to run water into the upper water passage 12 of a generator chamber 16, the water falls down in the casing 17 of a cross flow water wheel 10 and vertically enters into a runner 3. Thus, the runner 3 is rotated to generate a power in a water wheel shaft 1, and this power is transmitted through transmitting means 20-22 to a generator 11, wherein power generation is conducted. At this time, a draft tube 18 has a head of a static draft height of water sucked from the water surface of a tailrace by the draft effect. Thus, the output of the cross flow water wheel can be efficiently taken out even at an ultra-low head.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a method for generating power obtained from a cross-flow water turbine. This article relates to a device that generates electricity from a cross-flow water turbine.

[Conventional technology]

A cross-flow turbine generator is a cross-flow turbine and a generator.
The water flowing across the runner attached to the water wheel shaft of the cross flow turbine generates power on the water wheel shaft, and this power is transmitted to the generator connected to the cross flow water turbine. Electric power is extracted. This type of cross-flow water turbine 1O shown in FIG. 4 is conventionally known. In the figure, 1 is a water wheel shaft, which has many blades 2.
A runner 3 is installed. 4 is a casing that guides water to the runner 3, and is arranged horizontally surrounding the runner 3. Note that a guide vane 5 is provided in front of the runner 3 to adjust the amount of water flowing into the runner 3. Reference numeral 6 designates a suction pipe that guides the water flowing out from the runner 3 to the discharge channel after the water flowing in from the casing 4 rotates the runner 3. Note that a generator (not shown) is connected to the water wheel shaft 1.

In such a configuration, the water flowing horizontally through the casing 4 flows into the runner 3 with its flow rate controlled by the guide vanes 5. The inflowing water rotates the runner 3 to generate power in the water wheel shaft l according to the flow rate of the water, and then the water flowing out from the runner 3 flows into the suction basin 6. The Na-released water is either released into the atmosphere and flows into the waterway, or is used to improve the efficiency of the water turbine by creating a water head at the suction height in the suction pipe 6 due to a draft effect.

The above-mentioned power is transmitted to the generator Tls via the water wheel shaft l, and electric power corresponding to this power is generated.

[vjl to be solved by the invention, 8] Cross-flow turbines are usually applied to heads of Torn-10 m, but it is also required that they can be used for extremely low heads of 5 m to 2 m. However, with such an ultra-low head, the water depth of the runner becomes shallow, making it impossible to use the conventional structure.
The problem is that the efficiency is extremely low.

An object of the present invention is to provide a cross-flow water turbine power generation device that is equipped with a cross-flow water turbine that can efficiently obtain a water-turbine output even with an extremely low head, and that can obtain the required electric power.

[Means to solve the problem]

the above#! i,li! ! ! In order to solve this problem, according to the present invention, a runner attached to a water wheel shaft, surrounding this runner,
A cross-flow turbine consisting of an upright casing that leads water to this, a suction pipe that is connected to this casing and inserted into the water of the spillway and has a draft effect, and one or more of these cross-flow turbines? ! A fiber cross-flow water turbine power generation device is constructed by including one generator connected to several water turbine shafts via transmission means.

[Effect]

Experiments have shown that it is more efficient for the water flowing into the launch to flow vertically into the launch, so the casing that surrounds the launch and guides the water to the launch is placed upright, and the suction pipe is placed under water in the spillway. A water turbine that can efficiently extract output can be obtained by inserting it into the water to create a draft effect and increase the effective head. At this time, the required electric power can be extracted by connecting a plurality of cross-flow water turbines to one generator via a transmission means.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a cross-sectional view of the configuration of a cross-flow water turbine power generation device in which a cross-flow water turbine is connected to a generator according to an embodiment of the present invention;
2 is a plan view of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. In FIGS. 1 to 3, parts that are the same as those in the conventional example shown in FIG. 4 are given the same reference numerals, and their explanations will be omitted.

In FIGS. 1 to 3, the cross flow turbine 10 has two
The three electric machines 11, which are arranged in parallel and connected to these water turbines by a belt transmission mechanism, have a concrete water channel 12 on the top through which water flowing into the cross-flow water turbine 10 is guided.
The casing 17 and the like of the cross-flow turbine 10 are connected to the generator room 16. Note that 19 is a gate that guides water to each cross-flow water turbine 10.

The cross-flow turbine 10 stands upright surrounding the runner 3, and includes a casing 17 communicating with the waterway 12, and a suction pipe 18 connected to the casing 17 and inserted into water having a water surface 30 of the tailrace. Note that the cross section of the casing 17 is tapered toward the direction in which water flows through the water channel 12 in the upper part of the generator room 16 and flows into the runner 3, so that water flows uniformly in the longitudinal direction of the runner 3.

Note that the water depth at the center of the runner 3 must be at least 2D when jf (diameter is D) of the runner 3. This is to prevent eddies from being generated when the runner 3 rotates.

In this embodiment, the runners 3 have a length of 34D and are arranged in parallel.

The distance between the shafts of the L'l Suflow turbine IO is 2.9D.
I'm keeping it. In addition, guide vanes are installed [This type of hydropower plant is usually a run-of-river power plant, and the water
This is because ffi is approximately constant, so even if no guide vane is provided, the efficiency will not be affected much.

A large diameter pulley 2 is attached to the water wheel shaft l of each cross flow water turbine 10.
A small diameter pulley 21 is attached to the shaft of the generator 11, and each cross flow water IILIO and the power generation fill are connected via these pulleys by a V belt 22, and a water wheel! The power of the thl is transmitted to the generator 1 via the V-belt 22.
1 and the output 1fil+ to the required rotation speed.
It's fast. 23 is a switch board.

In such a configuration, when the gate 19 is opened and water flows into the water channel 12 at the upper part of the generator room 16, the water flows as shown by the arrow and flows down the casing 17 of each cross-flow turbine 10 and reaches the runner. 3. The inflow water causes the runner 3 to rotate and generate power to the water wheel shaft 1, and this power is transmitted to the pulleys 20, 21 and the V-belt 2.
2, it is transmitted to the generator 11, and the output is 744g! 11 is increased in speed to a predetermined rotational speed and generates electricity. Water flowing out from the runner 3 flows into the suction pipe 18.

At this time, due to the draft effect, the suction pipe 18 has a water head at the suction height sucked up from the water surface of the discharge channel. In this way, the water flows vertically into the runner 3, and the water flowing out from the runner 3 has a draft effect, so that the water turbine output can be efficiently extracted.

In addition, there are 2 crossflow water turbines installed, so you can get 1 out of 1! The machine can generate the required power equivalent to the output of two water turbines.

In this example, the power is transmitted by a bobbin and a V-belt, but it may also be done by a gear system. Also, although two cross-flow water turbines are connected in parallel, it may be done by using only one. In this case, the power output is Although it is one unit, the same effect as a water turbine can be obtained.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the casing that surrounds the runner of a cross-flow turbine and allows water to flow into it is made upright, and the suction pipe that has a draft effect is provided, so that the runner is not Water falls vertically through the casing and flows in, and the suction pipe has a draft effect, so the turbine output can be extracted efficiently even at extremely low head. Furthermore, when multiple cross-flow turbines are connected to one generator via transmission means, even if the individual turbine output is small, a large turbine output is given to the generator, and the required amount of generated power is generated. can get.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a cross-flow water turbine generator according to an embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a cross-sectional view of a conventional FIG. 2 is a cross-sectional view of a cross-flow turbine. 1: Water wheel shaft, 3: Lunch, 4.17 Two casings, 18: Suction pipe, 10: Cross flow turbine, 2 shots per l Fig. 1 Fig. 2

Claims (1)

[Claims] 1) A runner attached to the water wheel shaft, surrounding this runner,
A cross-flow turbine consisting of an upright casing that guides water to this casing, a suction pipe that is connected to this casing and inserted into the water of the spillway and has a draft effect, and transmission to one or more water wheel shafts of this cross-flow turbine. 1. A cross-flow water turbine power generation device comprising one generator connected via a means.