JPS6332931Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a guide vane operating device for a cross-flow water turbine, and is improved so that the guide vane can be opened and closed by the rotational force of the water turbine.

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, and 7
8 is a cover, and 8 is a water discharge pipe. The guide vane 2 is opened and closed 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.

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, an object of the present invention is to provide a guide vane operating device that does not require a special power source for the guide vanes. The configuration of the present invention that achieves this object includes a winding transmission member that transmits the rotational force of the runner, and a winding transmission member that is wound around and rotated, and a first gear is connected via a first electromagnetic clutch. a second gear via a second electromagnetic clutch which is coupled to the first shaft by a gear coupling and is rotated in the opposite direction to the first shaft and has a polarity opposite to that of the first electromagnetic clutch; a second shaft connected to the first gear, a forward/reverse gear that meshes with the first gear and the second gear, a converting device including a worm gear and converting the rotational motion of the forward/reverse gear into linear motion, and a linear motion of the converting device. The guide vane is characterized by having an operating lever that is rotated by movement to open and close the guide vane.

Embodiments of the present invention will be described in detail below with reference to 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 the invention. As shown in the figure, one end of the runner shaft 10 is connected to the main power transmission joint 1.
The other end of the runner shaft 10 is provided with a pulley 13 on which a winding transmission member (belt, chain, etc.) 12 is hung. The wrapping transmission member 12 is
It is wound around the pulley 15 of the first shaft 14.
A coupling gear 16 is fixed to the first shaft 14, and a first gear 18 is connected to the first shaft 14 via an electromagnetic clutch 17 of a non-excitation type. A coupling gear 20 that meshes with the coupling gear 16 is fixed to the second shaft 19, and an electromagnetic clutch 2 of an excitation operation type is fixed to the second shaft 19.
A second gear 22 is connected via 1. The forward/reverse gear 23 is connected to a worm 24 of a worm gear, and the center of the worm wheel 25 is screwed into a threaded 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 connected to an electromagnetic brake 27 of an excitation operated type. The screw shaft 26 is connected to an operating lever 30 via a connecting rod 28 and an overload limiter 29. 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.

As specifically explained above in conjunction with the embodiments, the present invention provides the following effects.

(1) No hydraulic pressure or other power supply is required to operate the guide vane, simplifying the equipment and ensuring safety in the event of failure.

(2) Operation is extremely simple with only two clutches.

(3) Selection of operating speed and increase in pressure inside the iron pipe due to guide vane closure can be performed without a special operating speed adjustment device. By the way, with pressure oil, etc., it was necessary to adjust the flow rate and adjust the closing speed.

(4) It has a fail-safe mechanism, and the guide vane automatically fully closes and stops in the event of a failure, making it safe.

(5) It can be configured more compactly than any other method (electric, hydraulic). In addition, since the mechanical part is necessarily mounted on a part of the water turbine (in principle, on the upper part), the installation space is not taken up and the effort of installation can be saved.

(6) Since no oil is used, oil maintenance is easy.
There is no need for oil contamination, and you are free from the problems of starting frequency, starting current, and complicated control systems that occur with electric systems.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a conventional cross-flow water turbine, and FIG. 2 is a schematic perspective view showing an embodiment of the present invention. In the drawing, 1 is a runner, 2 is a guide vane, 12
14 is a winding transmission member, 14 is a first shaft, 16, 20
17 and 21 are electromagnetic clutches, 18 is a first gear, 19 is a second shaft, 22 is a second gear, 23
is a forward/reverse gear, 24 is a worm, 25 is a worm wheel, 26 is a screw shaft, 28 is a connecting rod, 3
0 is an operating lever.

Claims (1)

[Scope of utility model registration request] a wrapping transmission member that transmits the rotational force of the runner;
The winding transmission member is wound around and rotated, and the first shaft is connected to a first gear via a first electromagnetic clutch, and the first shaft is connected to the first shaft by a gear coupling and is opposite to the first shaft. a second electromagnetic clutch of opposite polarity to the first electromagnetic clutch.
a second shaft to which a second gear is connected via an electromagnetic clutch; a forward and reverse gear that meshes with the first gear and the second gear; and a worm gear that converts rotational motion of the forward and reverse gear into linear motion. 1. A vane operating device for a cross-flow water turbine, comprising: a device; and an operating lever that is rotated by the linear motion of the converting device to open and close a guide vane.