JPS6349566Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water turbine chamber of a reaction blade water turbine for a low water level generator.

Conventionally, the turbine chamber of a reaction blade turbine for a low water level generator is
The entire room is filled with fluid, and a reaction blade waterwheel is moving within it. For this reason, one end of the turning section of the reaction blade turbine always moves against the flow of fluid, creating a large resistance to the reaction blade turbine, resulting in a disadvantage that the efficiency of extracting power from the turbine is low.

Therefore, in the present invention, an air chamber is provided in the upper part of the reaction blade turbine chamber, and the reaction blade located inside the reaction blade turbine chamber is arranged so that the reaction blade on the fluid inlet side moves downward and the reaction blade on the fluid outlet side moves upward. The upper turning part of the reaction blade turbine is located in the air chamber above the fluid, and high pressure air is supplied into the air chamber from a high pressure air pipe connected to the air chamber in accordance with the water level in the reaction blade turbine chamber to lower the water level. A water level control device is provided to maintain the water level below the upper turning point.

With the above configuration, it is possible to reduce the fluid resistance experienced by the upper turning section of the reaction blade hydraulic turbine and improve efficiency, regardless of fluctuations in the water level.

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

In the drawing, the upper turning position of the reaction blade turbine 21 is the water channel 2.
An example is shown in which the water level is lower than the water level 23 of 4. Waterway 24
A fluid inlet 26 is provided in the cutoff bank 25 provided at
A waterway gate 27 is provided on the fluid inlet A side. A cylindrical channel shell 17 is provided on the fluid outlet B side of the water stop bank 25, its upstream end is attached to the fluid outlet B of the water stop bank 25, and its downstream end is opened to the fluid outlet B side. A water wheel chamber 5 is located at an appropriate position on the water channel shell 17.
An upper water wheel shaft 18 and a lower water wheel shaft 19 are provided in the upper and lower parts of the water turbine chamber 5, respectively.
8 and 19, chain wheels 3 are installed on both side walls of the water turbine chamber, and both chain wheels 3 are installed vertically opposite each other.
A chain 2 with reaction wings is attached to the chain 2. The reaction vanes of this chain 2 with reaction vanes are configured such that the fluid inlet side moves downward and the fluid outlet side moves upward due to lift generated by the fluid. Upper water wheel shaft 18 and lower water wheel shaft 19
At both ends and in the center, three intermediate rectifying water guiding fixed blade support plates 29 are attached, into which bearings 28 for intermediate rectifying water guiding fixed blade supporting plates provided at the upper and lower ends fit. In addition,
The number of support plates 29 may be two or four or more depending on the requirements. A plurality of smoothly curved intermediate rectifying water guiding fixed blades 30 are provided between each of the intermediate rectifying water guiding fixed blade supporting plates 29. On the fluid inlet A side of the reaction vane water turbine 21 configured in this way, a rectifying water guiding fixed vane 31 consisting of a plurality of layers is provided, and both ends of each vane are attached to the inner wall of the water channel shell 17. One end of the upper water wheel shaft 18 is extended to the outside of the channel shell 17 and drives the generator 1 through a transmission device 20 .

Further, a water level control device for controlling the water level 16 in the air chamber 4 is disposed in the water turbine chamber 5 . That is,
A float gauge port 15 at one lower end opens on the upper surface of the waterway shell 17 on the downstream side of the water turbine chamber 5 by a suitable length, and one upper end is connected to the air chamber 4 at the upper part of the water turbine chamber 5 through a float gauge air communication pipe 14. A communicating float gauge casing 9 is provided, and a float 10 having a magnet is floated inside the float gauge casing 9. On the outer periphery of the float gauge casing 9, there is a ring-shaped moving piece 1 that is attracted to the magnet of the float 10 and follows the movement of the float 10.
1, and if necessary, a movable piece guide 12 for guiding the vertical movement of the movable piece 11 is provided near the float gauge casing 9. A limit switch 13 for driving a solenoid valve that detects the movement of the moving piece 11 is provided near the float gauge casing 9, and the detection output of the limit switch 13 controls the opening and closing of the solenoid valve 7 to control the opening and closing of the solenoid valve 7. Control the water level 16. A high-pressure air pipe 8 communicates with a high-pressure air tank (not shown), and is connected to the high-pressure air inlet 6 of the air chamber 4 above the water turbine chamber 5 via the electromagnetic valve 7. This water level control device is composed of the above-mentioned solenoid valve 7, high pressure air pipe 8, float gauge casing 9, float 10, moving piece 11, moving piece guide 12, limit switch 13, air communication pipe 14, and float gauge port 15. Ru.

With this configuration, air is first stored in the high-pressure air tank, and then water is allowed to flow into the water turbine chamber 5 from the fluid inlet A. Lift force is generated on the reaction blades by the water flow, and the reaction blades on the fluid inlet side move downward and the reaction blades on the fluid outlet side move upward. , the generator 1 is operated via the transmission device 20 to generate electricity. Since the reaction blade rotates along the moving direction of the fluid at the lower turning portion, it does not become a resistance to the reaction blade water turbine 21, and on the contrary, the rotation of the reaction blade water turbine 21 can be increased. At this time, the water level in air chamber 4 is 16
If the water rises, there will be a large resistance when the reaction blade turbine 21 turns at the upper part, so the water level 16 needs to be controlled by a water level control device. That is, since the upper end of the float gauge casing 9 is communicated with the air chamber 4 through the float gauge air communication pipe 14 as described above, the water level inside the float gauge casing 9 is the same as the water level 16 in the water turbine chamber 5. , the float 10 follows the water level.
When the water level 16 rises above a certain level, the moving piece 11 acts on the limit switch 13, and the solenoid valve 7 opens. As a result, high-pressure air flows from the high-pressure air tank through the high-pressure air pipe 8 and into the air chamber 4 from the high-pressure air inlet 6, and the water level in the air chamber 4 is lowered. Then, the float 10 and the movable piece 11 are also lowered accordingly, and the limit switch 13 is activated to close the solenoid valve 7. By repeating such operations, the water level 16 in the air chamber 4 is controlled so that the upper turning portion of the reaction blade turbine 21 is always outside the fluid.
Therefore, the turning at the upper part of the reaction blade water turbine 21 is performed inside the air chamber 4, that is, outside the fluid, and there is no resistance to turning against the fluid, and the efficiency of extracting power from the water wheel is extremely high. .

In the above embodiment, the magnetic force of the float 10 of the water level control device, the movable piece 11 interlocked with the magnetic force, and the limit switch 13 that detects the movement of the movable piece 11 were used, but this can be similarly configured as shown in FIG. It is. In FIG. 4, the electromagnetic valve 7 is opened and closed by directly detecting the movement of the float 10A by the limit switch 13A.

As explained above, according to the turbine chamber of the reaction blade turbine for a low water level generator of the present invention, the reaction blades in the lower turning section of the reaction blade turbine are turned from the fluid inlet side to the fluid outlet side along the fluid flow direction. The movement of the reaction blade is promoted by the fluid flow, and the upper turning part where the reaction blade is turned from the fluid outlet side to the fluid inlet side is located in the air chamber above the fluid and has no resistance, unlike conventional This greatly improves the efficiency of extracting power from a water wheel compared to conventional systems. In addition, the water level in the air chamber at the top of the turbine chamber is always maintained below the upper turning section by the water level control device, so even if there is a large fluctuation in the water level of the inflow channel, the upper turning section will always keep the fluid above the upper turning section. can be located in

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing an embodiment of the present invention;
2 is a plan view of FIG. 1, FIG. 3 is an enlarged view of the main part of FIG. 1, and FIG. 4 is an enlarged view of the main part showing another example of water level control. 4... Air chamber, 5... Water turbine chamber, 6... High pressure air inlet, 7... Solenoid valve, 8... High pressure air pipe, 9... Float gauge casing, 10, 10A... Float, 13, 13A... ...Limit switch, 14
... Float gauge air communication pipe, 15 ... Float gauge port, 16, 23 ... Water level, 18 ... Upper water wheel shaft, 19 ... Lower water wheel shaft, 21 ... Reaction blade water turbine.

Claims (1)

[Scope of utility model registration request] An air chamber is provided in the upper part of the reaction blade turbine chamber, and the reaction blade on the fluid inlet side moves downward while the reaction blade on the fluid outlet side moves upward. A turning section is located in the air chamber above the fluid, and high pressure air is supplied into the air chamber from a high pressure air pipe connected to the air chamber in accordance with the water level in the reaction blade turbine chamber to lower the water level below the upper turning section. A water turbine chamber for a reaction blade water turbine for a low water level generator, characterized in that it is provided with a water level control device for maintaining water level.