JPH0111978Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cross-flow water turbine, and more particularly to a water turbine capable of starting a water turbine having guide vanes that are driven to open and close using the rotational force of a runner as a power source.

Figure 1 shows a conventional cross-flow turbine. In the figure, 1 is a runner, 2 is a guide vane, 3 is a casing, 4 is a bearing, 5 is a shaft, 6 is an inlet pipe, 7 is a cover, 8 is a water discharge pipe, and the guide vane 2
The opening and closing is performed by a hydraulic device, an electric motor, etc. (not shown). In other words, in the prior art, a large power source as described above was required to open and close the guide vane 2. When starting the runner 1, the runner 1 is started by gradually opening the guide vanes 2 and letting out water.

In view of the above-mentioned prior art, the present invention provides a cross-flow water turbine with a separate means for starting the runner, which is a guide vane operating device that utilizes the rotational force of the runner without using a special power source for the guide vane. With the goal.

In order to achieve such an object, the present invention provides a cross-flow turbine equipped with an oscillating guide vane in a waterway upstream of a runner to control the amount of water supplied to the runner, with a oscillating shaft of the guide vane. A control lever is connected and provided, a screw shaft is provided with one end connected to the control lever, a worm wheel is provided with the screw shaft penetrating through the center and screwed into the worm wheel, and the one end meshes with the worm wheel. A worm shaft is provided with a worm and a gear on the other end, a gear is provided on one end to mesh with the gear of the worm shaft, and a gear is provided on the other end to mesh with each other via a clutch. A pair of gear shafts are provided, one of the gear shafts and the shaft of the runner are interlocked and connected so that the threaded shaft can move forward and backward in the axial direction by rotation of the runner, and one end is A cross with a starting device, characterized in that a bypass pipe is provided, which opens into a waterway upstream from the guide vane, and whose other end opens toward the runner to rotate the runner by discharging water via an on-off valve. This project proposes a flow turbine.

Embodiments of the present invention will be described in detail below based on the drawings. Note that parts that are the same as those in the prior art are given the same numbers. FIG. 2 shows an embodiment of a guide vane operating device that utilizes the rotational force of a runner, which is the premise of the present invention. As shown in the figure, one end of the runner shaft 10 is connected to a generator (not shown) via a main power transmission joint 11, and the other end of the runner shaft 10 is connected to a winding transmission member (such as a belt or chain). ) 12 is mounted on a pulley 13. The winding transmission member 12 is wound around a pulley 15 of a first gear shaft (hereinafter referred to as the first shaft 14). The first shaft 14
, a coupling gear 16 is fixed, and a first gear 18 is connected via a non-excited electromagnetic clutch 17.
are connected. 2nd gear shaft (hereinafter referred to as 2nd shaft)
A coupling gear 20 that meshes with the coupling gear 16 is fixed to the coupling gear 19, and a second gear 22 is connected via an electromagnetic clutch 21 of an excitation operation type. The forward/reverse gear 23 is connected to a worm shaft 24 on which a worm is formed.
The center of the worm wheel 25 screwed into the worm No. 4 is screwed into the screw shaft 26. Therefore, the rotational motion of the forward/reverse gear 23 is converted into linear motion. Of course, since it is a worm gear, linear motion is not converted into rotational motion. Further, the forward/reverse gear 23 is operated by an electromagnetic brake 27 of an excitation operation type.
is connected to. The screw shaft 26 is connected to the operating lever 3 via a connecting rod 28 and an overload limiter 29.
Connected to 0. Therefore, when the operating lever 30 is rotated, the guide vane 2 opens and closes.

The electromagnetic clutch 17 is de-energized and connected,
When the electromagnetic clutch 21 is de-energized and disconnected, the coupling gear 16, the first gear 18, and the forward/reverse gear 2
3 and the worm wheel 25 rotate in the direction of the arrow shown by the solid line in the figure. Therefore, the connecting rod 28 is pulled in the direction of the solid arrow in the figure, and the operating lever 30
The guide vane 2 is closed by rotating in the direction of the solid arrow in the figure. On the other hand, electromagnetic clutch 1
When the electromagnetic clutch 21 is energized to be in a disconnected state and the electromagnetic clutch 21 is energized to be in a connected state, the coupling gear 20, the second gear 22, the forward/reverse gear 23, and the worm wheel 25 rotate in the direction of the dotted arrow in the figure. Therefore, the connecting rod 28 is pushed in the direction of the dotted line arrow in the figure, and the guide vane 2 is opened by rotating the operating lever 30 in the direction of the dotted line arrow in the figure. When the guide vane 2 is not operated, the electromagnetic brake 27 (excitation operated type) is excited to apply the brake and restrain the rotation of the forward/reverse gear 23.

When power is lost due to an electrical failure, the electromagnetic clutch 21 and the electromagnetic brake 27 are disconnected, and the electromagnetic clutch 17 is connected.
Guide vane 2 closes. In other words, it is a fail-safe mechanism that operates safely. At this time, due to water leakage from guide vane 2, runner 1
When the pulley 15 rotates, the torque reliever provided on the pulley 15 will not slip and the device will not be damaged. Note that the overload is alleviated by the overload limiter 29.

Guide vane operation is thus controlled by the rotation of the runner 1. In this case, the next problem is how to rotate the runner 1 when starting the crossflow turbine. When the runner 1 rotates, the guide vane 2 opens and the guide vane 2 can be controlled.However, it is necessary to provide a separate water flow supply means until the runner 1 starts rotating, and an example of this is shown in Fig. 3. . Even with the guide vane 2 that depends on the rotation of the runner 1 as shown in Fig. 2, it is possible to start it by manually opening the guide vane, but this water flow supply means is required in the case of remote control or automatic start. It is essential.

In FIG. 3, one end of a bypass pipe 31 is open in the casing 3 on the upstream side of the guide vane 2, and an on-off valve 32, which is a solenoid valve, is interposed in the middle of the bypass pipe 31. The other end opens near the outer periphery of the runner 1. and,
A nozzle 33 extending toward the runner 1 is provided at the other end of the bypass pipe 31 . Since the bypass pipe 31 is thinner than the main pipe, the generated torque is small and the rotational speed does not increase sufficiently, but it is sufficient for starting.

At the time of starting, the on-off valve 32 is opened and water on the upstream side of the guide vane 2 is dropped into the runner 1 through the bypass pipe 31 and the nozzle 33. This water flow causes the runner 1 to start rotating. When the guide vane 2 opens due to the rotation of the runner 1, main channel operation is established, the rotation speed is established, and normal operation begins. After this normal operation, the on-off valve 32 is closed to stop the water flow in the bypass pipe 31.

As specifically explained in the embodiments above, according to the present invention, in a cross-flow water turbine, the drive source of the guide vane is the rotational force of the runner, and the runner can be rotated even when the guide vane is not opened. By installing a bypass pipe for discharging water to the runner, there is no need to provide special power such as a hydraulic device or electric motor to start the guide vane. As a result, the cost, number of parts, and weight of the entire machine can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a conventional cross-flow water turbine, Figs. 2 and 3 show an embodiment of the present invention, and Fig. 2 is an exploded perspective view of an example of a guide vane operating device. FIG. 3 is a partially cutaway front view. In the drawing, 1 is a runner, 2 is a guide vane, 31
32 is a bypass pipe, 32 is an on-off valve, and 33 is a nozzle.

Claims (1)

[Scope of Claim for Utility Model Registration] A cross-flow turbine equipped with an oscillating guide vane in a waterway upstream of a runner to control the amount of water supplied to the runner, wherein an operating lever is attached to the oscillating shaft of the guide vane. A screw shaft is provided with one end connected to the operating lever, a worm wheel is provided through which the screw shaft penetrates through the center and is screwed into the worm wheel, and a worm is provided on the one end side to mesh with the worm wheel. At the same time, a worm shaft is provided with a gear on the other end side, a gear is provided on one end side to mesh with the gear of the worm shaft, and a pair of gears are provided on the other end side with gears that mesh with each other via a clutch. A gear shaft is provided, one of the gear shafts and the shaft of the runner are interlocked and connected so that the threaded shaft can move forward and backward in the axial direction by rotation of the runner, and one end is connected to the guide vane. A cross-flow water turbine with a starting device, characterized in that a bypass pipe is provided which opens into a waterway on the more upstream side, and whose other end opens toward a runner to rotate the runner by discharging water via an on-off valve.