JPS606077A - movable blade water turbine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION In movable blade water turbines such as tubular water turbines and mixed flow water turbines, the angle of the launch blades must be adjusted during operation. For this reason, a hydraulic servo motor is provided to adjust the launch blade angle.

FIG. 1 shows the configuration of a standard S-type tubular water turbine whose runner blades are operated by a hydraulic servo motor. In this figure, 1 indicates the stay ring, 2 indicates the outer guide case, 3 indicates the discharge ring, and 4 indicates the draft tube.
These form the outside of the flow path. Also, 5
is the runner blade, 6 is the runner boss, 7 is the inner water turbine main shaft, 8
indicates the outer water turbine main shaft, and the rotating part consisting of these is supported by a water turbine inner bearing 9 and a water turbine thrust guide bearing 10, and the water turbine inner bearing 9 is supported by a stibben provided on the stilling 1. That is, the launch blade 5 provided in the flow channel is connected to the water turbine main shaft 7.8 via the empty boss 6, and the water turbine inner bearing 9 and the water turbine thrust guide bearing provided at both ends of the water turbine main shafts 7 and 80. 10
Supported by Dimension 11 indicates a guide ben, and by adjusting the flow rate of the waterwheel with the guide ben 11, the output of the waterwheel can be completely adjusted. The angle of the runner blades 50 is also adjusted by the runner blade angle adjusting device according to the opening degree of the guide shaft 1, making it possible to utilize the water turbine efficiency highly over a wide range of flow rate fluctuations. The runner angle adjustment device includes a runner servo motor 12 and a pressure oil introduction device 16 that sends opening/closing hydraulic pressure to the runner servo motor 12. The runner servo motor 12 includes a piston 13, a cylinder 14, and an operating rod 1.
5, the reciprocating motion of the piston 13 is transmitted to the runner boss 6 via the piston operating rod 15, and the runner blade angle is adjusted using a runner blade link mechanism (not shown) provided in the runner boss 6. It looks like this.

The pressure oil introduction device 16 includes an open side pressure oil introduction chamber 17 that passes through the generator main shaft and is guided to the runner Ben servo motor 12, and a closed side pressure oil that is provided inside the generator main shaft and is guided to the runner Ben servo motor 12 through an inner pipe. It has an introduction chamber 18, and the runner blade control hydraulic pressure is supplied by a runner pressure distribution valve (not shown) provided in the regulator. 1
9 is a generator, 20 is a main generator, and 21 is an excitation generator.

A conventional Kaburan water turbine having such a structure requires a pressure oil introduction device for the runner servo motor that operates the runner blades, and also requires an elongated hole in the main shaft of the generator. Since the runner motor is installed on the main shaft, the bearing spacing is long and the critical speed is severe, making it difficult to manufacture,
There were many problems with installation, especially since the pressure oil introduction device had sliding parts, and there were many restrictions on maintenance, including banking.

That is, since the hydraulic pressure control 1 to the hydraulic servo motor used as the runner servo motor needs to be performed from the outside fixed part side, the hydraulic servo motor and runner blade connection mechanism, and the control pressure oil introduction device to the hydraulic servo motor are required. Also, the restoration mechanism of the hydraulic servo motor was complicated. 4-!
1', the backing of the pressure oil introduction device that sends control hydraulic pressure from the fixed part side to the rotating part side, the critical speed and assembly method of the pipe for sending pressure oil through the main shaft of the generator, and the installation of the signal transmitter for the speed control bar. Since the method is complex and difficult, there were many problems after operation.

[Purpose of the invention]

The present invention aims to eliminate these problems and provide a movable blade water turbine that can reduce operating force, simplify equipment, and greatly improve maintainability.

[Summary of the invention]

The present invention provides a movable water cannon wheel that has a shaft that rotates at the center of a cylindrical circle and an impeller, absorbs energy of water flowing in the cylinder with the impeller, transmits it to the rotating shaft, and extracts the energy to the outside, an electric motor provided in the rotating shaft or a rotating body that rotates in engagement with the shaft to operate the impeller; a generator that generates electricity by rotation of the shaft and drives the electric motor; and a generator for controlling the electric motor. It is characterized by having a rotating part that sends and receives signals and a contactless signal transmitter provided on the fixed part side.

In other words, the present invention operates the power supply 1 of the vane of a Kabran water turbine with an electric motor, and the necessary power generator, electric motor, and starting device are housed in a rotating body. , and contains a contactless signal transmission path that takes in the signal of the rotation angle of the runner blade, so that the control words provided on the outer fixed part can be received by the contactless signal transmitter, and the motor can be operated via the motor starting device. The angle of the rotating runner blades is controlled by the rotating body itself, so the runner blades are controlled by the same mechanism as the Fragages type water turbine.
Since it is a highly efficient Kaburan water turbine, it is very effective for small and medium capacity power generation facilities.

[Embodiments of the invention]

Figure 2 shows the basic configuration of the embodiment, and A in the figure shows the runner blade operating device housed in the rotating body.
22 is a generator for operating the runner blades, 23 is a motor for operating the runner blades, 24 is a starting device for the motor 23 for aligning the runner blades, 25 is a contactless signal transmitter on the rotating part side, and 26 is a gear and a lever.

It shows the runner blade operating mechanism consisting of links, 27
Reference numeral 28 indicates a non-contact signal transmitter on the fixed part side, and 28 indicates a runner blade opening adjustment device.

FIG. 3 shows the structure of an S-type tubular water turbine having the basic configuration shown in FIG. 2, and the same parts as in FIGS. 1 and 2 are given the same reference numerals. In this embodiment, the non-contact signal transmitters 25 and 27 on the side of the rotating part and the fixed part are provided at the end of the shaft of the generator 19 on the side of the rotating part and the fixed part, and the electric motor 22 for operating the runner blades is provided on the side of the rotating part and the fixed part. gear of mechanism 26;
Link.

It is provided in the runner boss 6 on the rotating part side together with the lever etc., and the main generator excitation generator 21 also serves as the launch blade operating generator 22.

That is, in this embodiment, the electric power generated in the rotating armature of the externally excited generator of the runner blade operating generator is led to the runner blade operating motor 23 in the runner boss 6 through a cable installed along the main shaft. The rotation of the runner blade operating electric motor 23 opens and closes the runner blade 5 via a runner blade operating mechanism 25 consisting of a gear or the like. On the other hand, a runner blade appropriate opening setting signal is generated by the runner blade opening adjusting device 28 in link with the guide ben, and is sent to the non-contact signal transmitter 27 on the fixed part side.

Between the non-contact signal transmitter 27 on the fixed part side and the non-contact signal transmitter 25 on the rotating part side, a photo sensor or the like is used to transmit light so that signals can be transmitted regardless of the rotation speed. The control t4+ signal is exchanged by the signal. The optical signal 1 from the non-contact signal transmitter 27 on the fixed part side is received by the non-contact signal transmitter 25 on the rotating part side, and the received vane opening/closing signal is amplified and switched by the starting device 24. It will be done.

FIG. 4 shows a specific example of FIG. 2, and the same parts as in FIG. 2 are given the same reference numerals. In this figure, 29 is an excitation device for the generator 22 for operating the runner blades, and 30 is a rotating armature, which generates electric power by rotating the water wheel. Z1 to Z6 are diodes for rectifying the generated power into DC, ZD is a Zener diode, I(, is a resistor for voltage adjustment, FFB
1 and 1i” F B 2 is a protective breaker, Tr] ~
Tr4 is a switching transistor, L is a smoothing reactor, and B2 is a runner blade opening adjustment device. A rotary-side non-contact signal transmitter for receiving the signals of the optical transmitters of the contact signal transmitter, ILP+ and I' (, P2 are the optical transmitters P1 and P1 of the fixed part-side non-contact signal transmitter 27, respectively) 2 25 optical receivers are shown.

In this runner blade operating mechanism, when a runner blade opening signal is output from the runner blade opening adjustment device 28, the optical transmitter 1]
1 is excited, and the signal is received by the optical receiver It, 1) 1, and transmitted through the control line a to the transistor) p r! and 1
In order to conduct 1r4, transistors 7p r, ,
'p r4 and the electric motor 23 form a closed circuit, and the electric motor 2
3 rotates in the opening direction. If the runner blade opening adjustment device 28 still outputs the runner blade close signal, the optical transmitter P2
is excited, the signal is received by the optical receiver RP2, and conducts the transistors Tr2 and Tr3 via the control fi4b, so that the transistors T''2, Tr3 and the motor 23 are closed in the opposite direction to the above case. A circuit is formed, and the electric motor 23 moves in the closing direction, that is, the blade angle moves in the small opening direction.The electric motor 23 stops when the runner blade open signal or the runner blade close signal stops.

The movement angle of the runner blades is converted into voltage by a potentiometer (not shown) installed inside the rotating body, and is extracted using a digital non-contact signal transmitter and sent to the blade opening adjustment device 27. will be restored.

The C signal in Figure 3 is used when the machine is stopped or there is a malfunction such as power loss.
The figure shows power supplied from the fixed part side via diodes 7, 7, and 78.

That is, in the movable blade water turbine of the example, the runner blade control signal is transmitted from the fixed part side to the rotating part side by the signal transmitter, and excites the starter device of the electric motor provided in the rotating part, so that the runner blade control signal is transmitted along the rotation axis. The provided cable transmits the information to the electric motor in the runner boss, and the rotation of the electric motor is reduced through gears and levers.

The runner blades can be opened and closed using links, etc.

Since If# is configured in this way, signal transmission between the rotating body and the fixed part is performed with only one runner blade control word.
The power used to operate the launch vane is supplied by a generator installed on the rotating body, so the only parts that come in contact with the rotating body and fixed part are the bearing and water sealing parts. The intervening mechanism and parts are simple and easy to handle, making it possible to provide a Kabran water turbine with a simple structure and excellent maintainability.

The storage position of the electric motor is not limited to the case of the embodiment, and it may be installed in the bulb-shaped inner cylinder of the stay ring.
This function can be applied to water turbines with movable blades such as mixed flow water turbines.

As mentioned above, these movable blade turbines are (+)
Since the hydraulic mechanism for operating the runner blades on the movable blade water can be omitted, there will be no iIl [l] during oil spills due to oil leaks.

(2) Introduction of pressure oil for operating the runner blades (ζ positioning) can be omitted, and as a result, vanogging, oil sealing metal, etc. installed on the rotating and fixed parts are no longer required, simplifying the equipment and greatly improving maintainability. It can be achieved.

(3) The diameter of the main shaft can be made thinner because the Illll bearings are spaced apart by short lines.

(4) There is no need to install an oil pipe on the generator shaft,
Drilling work on the long shaft becomes easier, and as the number of parts decreases, disassembly and inspection becomes easier.

(5) Since the runner blade operating mechanism using an electric motor transmits shaft l and torque, the operating force is small and it can be downsized, so there are no restrictions on the mounting position.

〔Effect of the invention〕

The movable blade water turbine of the present invention reduces operating force, simplifies equipment,
This makes it possible to greatly improve maintainability and is an industrially effective dog.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the configuration of a conventional S-type tubular water turbine, Figure 2
The figure is a block diagram showing the basic configuration of an embodiment of the movable blade water turbine of the present invention, FIG. 3 is an explanatory diagram of the configuration of an S-type tubular water turbine having the basic configuration of FIG. 2, and FIG. FIG. 2 is a circuit configuration diagram showing the configuration. 1. Stay ring, 2.. Outer guide case, 4.
・Draft φ ube, 5...Runner blade, 6.Runner boss, 7.Inner water turbine main shaft, 8...Outer water turbine main shaft,
9... Inside the water turbine (1111i1i! 11 bearing, 10... Water turbine thrust bearing, 11... Guide ben, 19... Generator,
20... Main generator, 21... Excitation generator, 22...
- Generator for operating runner blades, 23... Electric motor for operating runner blades, 24... Starting device, 25... Non-contact signal transmitter on rotating part side, 26... Runner blade operating mechanism, 27.
...Non-contact signal transmitter on the fixed part side, 28.Runner blade opening adjustment device. Agent: Patent attorney Hiroo Nagasaki, '. (1 other person)””’ $ 2nd -489-

Claims (1)

[Claims] 1. It has a shaft and an impeller that rotate at the center of a cylindrical circle,
absorbing the energy of water flowing within the cylinder with the impeller;
In a movable blade water turbine that transmits energy to the rotating shaft and extracts energy to the outside, an electric motor is provided in the rotating shaft or a rotating body that engages with the shaft and rotates to operate the impeller, and generates electricity by rotating the shaft. A movable blade water turbine comprising: a generator for driving the electric motor; and a non-contact signal transmitter provided on a rotating part and a fixed part for transmitting and receiving control signals for the electric motor. 2. The movable blade water turbine according to claim 1, wherein the non-contact signal transmitter provided on the rotating part and fixed part side is an optical signal transmitter. 3. The movable vane water turbine according to claim 1 or 2, wherein the generator is a generator for exciting a main generator of the movable vane water turbine.