JP2596859Y2 - Runner vane operating mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a runner vane operating mechanism for a Kaplan turbine or a Delia turbine.

[0002]

2. Description of the Related Art As a conventional runner vane operating mechanism, there is one disclosed in Japanese Utility Model Laid-Open No. 2-107770, for example. In this conventional runner vane operating mechanism, a runner operating rod that moves in the axial direction to open and close the runner vane is moved axially by a lever via a bearing, and this lever is pushed and pulled by an electric motor via a screw shaft. I do. As described above, the conventional runner vane operating mechanism is electrically driven.
The runner vane is opened and closed by an electric servomotor instead of a hydraulic servomotor.

As described above, in the conventional runner vane operating mechanism, the use of an electric servomotor in place of the hydraulic servomotor makes the structure of the runner vane operating mechanism simple and eliminates the need for oil leakage countermeasures. The cost was greatly reduced and the control characteristics were also improved.

[0004]

However, a very large thrust load is applied to the rod for operating the runner. To support this load and overcome the load to drive the rod, the electric servomotor is structurally difficult. There are limitations,
Large-scale Kaplan turbines of 7,000-10,000 kW class or more, a deria turbine, and a runner vane operating mechanism of a movable blade vertical shaft mixed flow pump have had to rely on a hydraulic servomotor.

The present invention has been made to solve the problems of the prior art , and is small and compact.
While, conventionally impossible in which it was large in Kaplan turbine, to runner vane operating mechanism Delia water wheel and movable vanes elevational shaft mixed flow pump it is an object to enable the application of an electric servo motor.

[0006]

In order to solve the above problems, the present invention provides a runner vane that opens and closes a runner vane via a generator-side operating rod and a runner-side operating rod that is movable in an axial direction within a main shaft. In the operating mechanism, each other
A rod operating force reducing mechanism is connected to the generator-side operating rod and the runner-side operating rod aligned in the axial direction, and the rod operating force reducing mechanism is connected to the generator-side operating rod .
The generator operation rod is integrated with the generator operation rod so as to be orthogonal to the axis.
With at least four opposing sides
A generator-side supporting plate to each end of the generator-side supporting plate
A plurality of first links pinned to the side , and
A plurality of levers each having a pin connected to each other end of the first link, a plurality of arms each having one end pinned to the other end of each lever, and a bottom portion to which each other end of the arm is fixed.
Then , the cup-shaped lever support plate formed integrally with the main shaft and the axis of the runner-side operation rod are perpendicular to the axis.
When it is integrally attached to the runner side operation rod,
The middle portion between the two ends of at least four and runner-side supporting plate having sides, each other end of the plurality of levers with each one end is pinned to the sides of the runner-side supporting plate to faced each other And a plurality of second links that are pin-connected to each other.

[0007]

According to the runner vane operating mechanism having the above-described structure , the rod operating force reducing mechanism includes the generator-side support plate 5.
And around the runner-side support plate 16 as a whole,
In the axial direction of the side operation rod and runner side operation rod.
Along . When the generator-side operation rod moves in the axial direction, the first rod supported by the generator-side support plate is moved.
Is moved, and the lever rotates about the arm fixed to the lever support plate as a fulcrum. At this time, the second link having the intermediate point of the lever as a fulcrum moves in the axial direction, whereby the runner-side operation rod is driven via the runner-side support plate. The stroke of the runner-side operation rod is smaller than that of the generator-side operation rod, and the rod operation force can be reduced accordingly.

Therefore , even when the runner vane operating mechanism is applied to a large Kaplan turbine, a Delia turbine, or a movable blade vertical shaft mixed flow pump, the generator-side operating rod is moved in the axial direction by using an electric servomotor. The side operating rod can be driven.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, an embodiment of the present invention will be described in detail. FIG. 1 is a perspective view, partially broken away, showing one embodiment of a runner vane operating mechanism according to the present invention.

[0010] As shown in FIG. 1, the generator-side operating rod 1
If, runner-side operating rod 3 for opening and closing the runner vanes (not shown) of the generator-side operating spindle aligned to Jikukokorokata towards the rod (e.g., Kaplan water axle) within 2 to move in the axial direction
DOO, the accordance with the present invention, the rod operating force reducing mechanism 4 against
Has been continued . The rod operating force reducing mechanism 4 includes a generator-side support plate 5 fixed to one end of the generator-side operating rod 1 with a nut or the like and integrally formed . This power generation
In the embodiment, the machine-side support plate 5 is provided with all corners chamfered.
It is a rectangular or square plate. And this rectangle
A rod head 6 is provided on each side of the generator-side support plate 5
One end of a lever 10 is connected by a pin 11 to another rod head 9 connected to the rod head 6 via a turnbuckle 8. The two rod heads 6 and 9 and the turnbuckle 8 are connected to the generator-side operation rod 1 aligned as shown in the figure.
And a link (first link) 12 extending substantially parallel to the axis of the runner-side operation rod 3 . Thus, in other words, which one end of a link 12 is coupled by one side <br/> to pin 7 of the generator-side supporting plate 5, and by the other end to the pin 11 of the end link 12 of the lever 10 Are combined. As described above, a plurality of links 12 are provided around the generator-side support plate 5, and one link is provided on each side of the rectangular generator-side support plate 5 in this embodiment, a total of four links 12. One end of each lever 10 is connected by a pin 11.

The other end of each lever 10 is connected to one end of an arm 13 extending substantially parallel to the link 12 by a pin 14 as shown in the figure. The other ends of the arms 13 are fixed to a lever support plate 15 . The lever support plate 15 has a cup shape with a flange formed integrally with the main shaft 2 , as shown in FIG.
Each arm at the bottom of this cup, as will be easily understood
The other end of 13 is fixed . On the other hand, one end of the runner-side operation rod 3 has substantially the same rectangular shape as the generator-side support plate 5.
The runner-side support plate 16 is fixed by a nut or the like and is integrally formed. Moreover, the runner-side support plate 16
One end of each of a plurality of links (second links) 17 in this embodiment is connected to each side by pins 18. The other end of each link 17 is connected between both ends of the plurality of levers 10 described above, that is, the fulcrum of the pin 11 and the pin 1
The pin 19 is connected to an intermediate portion between the fulcrum 4 and the fulcrum. 20 and 21 are keys, and 22 and 23 are covers .
The flanges of the cover 22 and the lever support plate 15
Combine as shown and by appropriate means (not shown)
Connected .

Next, the operation of the rod operating force reducing mechanism 4 having the above-described configuration will be described. Generator side operating rod 1
Moves in the axial direction, the first link 12 supported by the generator-side support plate 5 moves, and the lever 10 rotates about the arm 13 fixed to the lever support plate 15 as a fulcrum.
At this time, the second link 17 having the intermediate point of the lever 10 as a fulcrum (pin 19) moves in the axial direction, whereby the runner-side operation rod 3 is driven via the runner-side support plate 16. The stroke of the runner-side operation rod 3 is smaller than that of the generator-side operation rod 1, and the rod operation force can be reduced accordingly. That is, assuming that the length between the pins 11 and 14 is A and the length between the pins 14 and 19 is B in FIG.
/ A.

Therefore, even when the above-described runner vane operating mechanism is applied to a large Kaplan turbine, a Delia turbine or a movable blade vertical axial flow pump of 7,000 to 10,000 kW class or more, an electric servo motor (not shown) is used. The runner-side operation rod 3 can be driven by moving the generator-side operation rod 1 in the axial direction using. It is needless to say that the generator-side operation rod 1 can also be driven by a hydraulic servomotor.

[0014]

As mentioned [devised effect described above, according to the present invention, the small
This type of hydraulic machine can be applied to the large- sized Kaplan turbine, Delia turbine and runner vane operating mechanism of the movable blade vertical shaft mixed flow pump, which was impossible in the past, despite its compact and compact configuration. Simplification of equipment, cost reduction, and labor saving of maintenance can be achieved. In particular, according to the present invention,
The generator-side support plate and the runner-side support plate
It has four sides, and the lever support plate is integrated with the main shaft.
It is cup-shaped with a bottom, and one end of the first link is
Attach to each side of the generator side support plate, the other end of the first link
The other end of the arm that is connected at one end to the lever attached to
To the bottom of the lever support plate, and
One end of the second link, the other end of which is connected to the runner side support.
Since it is attached to each side of the holding plate, rod operating force reduction mechanism
Are the end faces of the generator side operation rod and runner side operation rod.
Between the generator and runner operation rods.
Runner vane operation
Not only does the axial length of the mechanism decrease,
By connecting the end to the bottom of the lever support plate,
The radial dimension of the non-vane operating mechanism can be reduced.
I can .

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a runner vane operating mechanism according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Generator side operation rod, 2 ... Main shaft, 3 ... Runner side operation rod, 4 ... Rod operation force reduction mechanism, 5 ... Generator side support plate, 6 ... Rod head, 7 ... Pin, 8 ... Turnbuckle, 9 ... Rod head, 10 ... Lever, 11 ... Pin, 1
2 ... first link, 13 ... arm, 14 ... pin, 15 ...
Lever support plate, 16 ... runner side support plate, 17 ... second link, 18 ... pin, 19 ... pin, 20 ... key, 21 ... key, 22 ... cover, 23 ... cover.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F03B 3/14

Claims (1)

(57) [Scope of request for utility model registration] A runner vane operating mechanism that opens and closes a runner vane via a generator-side operating rod and a runner-side operating rod that is axially movable in a main shaft.
A rod operating force reducing mechanism is connected to the generator-side operating rod and the runner-side operating rod aligned in the center direction, and the rod operating force reducing mechanism is connected to the shaft of the generator-side operating rod .
Attached to the generator operation rod so as to be perpendicular to the heart
And has at least four opposing sides
That the generator-side supporting plate, a plurality of first link one end of which is pinned to the sides <br/> of the generator-side supporting plate, each end said
A plurality of levers pin-connected to each other end of one link ;
A plurality of arms each having one end pin-connected to the other end of each of the levers, and a bottom to which each other end of the arm is fixed.
And a cup-shaped lever support plate formed integrally with the main shaft and a shaft center of the runner-side operation rod.
When attached integrally to the runner side operating rod,
The middle portion between the two ends of at least four and runner-side supporting plate having sides, each other end of the plurality of levers with each one end is pinned to the sides of the runner-side supporting plate to faced each other And a plurality of second links pin-connected to the runner vane operating mechanism.