JPS6380735A - Generating set - Google Patents

Abstract

PURPOSE:To shorten the axial length of a power transmission system by forming a structure that the output shaft of a gear mechanism and a generator rotor are repeated coaxially through engaging and disengaging means. CONSTITUTION:A hollow generator rotor 13 for coaxially transmitting power by returning to an opposite side along the axial direction of the output shaft 12 of a gear mechanism 3 is provided around the outer periphery of the output shaft 12. The rotor 13 is connected to the shaft 12 by engaging and disengaging means 15, and the means 15 is controlled to be switched by control means 17 by the input rotating speed to the mechanism 3. Further, the shaft 12 is integrally provided with the rotor 13 in a casing 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to power generation equipment, and in particular, the present invention relates to power generation equipment, and in particular, there is a tooth between a water turbine and a generator. The present invention relates to a power generation device equipped with a coil structure.

[Prior Art] Various configurations are adopted for power generation devices depending on the purpose of use. For example, as shown in FIG. ! It is known that a mechanism C is connected to maintain the required number of revolutions to the generator. Conventionally, in such a power generation device, the tooth rs mechanism C
The generator and generator were each conceived as separate, independent units, designed and manufactured separately using existing technology and delivered. As a result of being installed as separate units, a flexible coupling d is adopted as a means of transmitting power 32 between them, and it is necessary to deal with problems of alignment and vibration between the gear mechanism C and the power generation 1b. It had been done.

[Problems to be Solved by the Invention] By the way, in the above-mentioned power generation device, the generator shaft and the gear mechanism C are each constituted by a unit, and the considerable length of each of these units is Gear mechanism C having
Output shaft 81 Rotor t1 of heavy electrical machinery In addition to these, flexible couplings d are all connected in series, so the combined shaft length of these shafts d, e, and f becomes long, and the power generation The entire device was enlarged and took up a large amount of dedicated space. Moreover, these factors also increased the weight and increased the cost.

Furthermore, the generator and the fl car N structure C had to be installed individually as a unit, and the ease of installation was not favorable.

In addition, since the power generation equipment is large, the related civil engineering work is difficult due to the Nlff, and the power generation 1b
When installing the valve underwater, the cost of the valve also increased.

On the other hand, since the water wheel a rotates at a considerable speed and there is a risk of over-rotating the generator and damaging it, the generator is designed to have a rigid structure in order to prevent this. Therefore, this also increases the weight and increases the cost.

The present invention was created to solve the above-mentioned problems.

[Means for Solving the Problems] The present invention provides a power generation device having a gear mechanism between a water turbine and a generator driven by the water turbine, in which the output shaft of the gear mechanism is surrounded by an outer periphery of the output shaft of the gear mechanism. A hollow generating rotor is provided which transmits power by coaxially folding back along the axial direction of the output shaft, a fitting/disengaging means is provided between the input end of the generating rotor and the output end of the output shaft, and a gear mechanism is provided. II If1 means is provided for detecting the input rotational speed and controlling the operation of the fitting/disengaging means.

[Function] Next, to describe the function of the present invention, the actual length of the power transmission system can be shortened by having a structure in which the output shaft of the tooth *t In addition, by controlling the fitting/removal means by the control means so as to prevent the generator from over-rotating, it is possible to reduce the size, aging, and cost of the entire power generating apparatus.

[Example] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the power generation device mainly consists of a water turbine 1, a generator 2 driven by the water turbine 1, and a speed increasing gear mechanism 3 provided between the water turbine 1 and the generator 2. configured. In particular, the gear mechanism 3 and the generator 2 are housed together in the same casing 4. In this embodiment, a W1 star 1 ml FM structure is adopted as the gear @ structure 3, and a 31 frame 6 rotatably supported by a radial bearing 5 is connected to the rotating shaft 7 of the water turbine 1 outside the casing 4. Further, a thrust bearing 9 is provided between the radial bearing 5 and the joint 8 and is located within the casing 4 to support the thrust transmitted to the ML frame 6. Furthermore, the gear 113 is the internal gear 1
0 is fixed to the casing 4, and the sun gear 11 is on the output side.

Output shaft 12 of gear mechanism 3 connected to this sun gear 11
A hollow generator rotor 13 is provided outside the outer periphery of the generator rotor 13 to surround it, and this generator rotor 13 coaxially returns the power transmitted along the axial direction of the output shaft 12 in the opposite direction. It is designed to be communicated by That is, the output shaft 12 of the gear mechanism 3 and the generator 111ff rotor 13 have a double shaft structure. Further, the generator rotor 13 is rotatably supported by a radial bearing 14.

Furthermore, the output end 12a of the output shaft 12 on the opposite side to the sun gear 11
These output ends 12 are connected between one end that becomes the
A fitting/disengaging means 15 such as a clutch is provided for connecting/separating the input m13a and the input m13a. The fitting/disengaging means 15 connects the output end 12a of the output shaft 12 and the input end 13a of the generator rotor 13, so that the rotational force of the water turbine 1 is transmitted to the generator rotor 13 via the gear mechanism 3. The generator rotor 13 is rotationally driven with respect to the stator 16 to generate electricity.

On the other hand, the fitting and removing means 15 includes a control means 1 that detects the input rotational speed to the gear mechanism 3 and controls the operation of the Ftl and removing means 15.
7 is connected. This tomorrow's crime means 17 is tooth ll! Rotation speed detection means 18 for detecting the input rotation speed to the mechanism 3
and one control component that operates the fitting/disengaging means 15 to disengage when the rotation speed detected by the rotation speed detection means 18 exceeds the set rotation speed, thereby preventing the generator 2 from over-rotating. Feedforward control is performed.

Here, the set rotational speed is set as the maximum rotational speed at which the generator mi2 does not fall into an overspeeding state.

Further, the casing 4 is formed by integrally joining a gear mechanism side casing part 4a and a generator side casing part 4b, and these casing parts 4a.

It is configured to be divisible into 4b. A guide rail 20 is laid below the generator side casing portion 4b along the axial direction of the output shaft 12, and the casing portion 4b
A roller 21 running on a guide rail 20 is installed at the bottom of the
will be placed. Then, while removing the generator side casing portion 4b from the gear mechanism side casing portion 4a and moving it, the sun tooth i of the gear mechanism 3! 11 and the planetary gear 22, the inside of the casing 4 can be opened.

According to the above configuration, the hollow rotor 13 is attached to the outer circumferential portion of the output shaft 12 of the gear mechanism 3, and the hollow rotor 13 surrounds the output shaft 12 and transmits power by coaxially folding back to the opposite side along the axial direction of the output shaft. By providing this, the shaft length of the power transmission system connected in series can be reduced, and the power transmission system can be reduced. 4. Miniaturization of the device can be achieved.

Also, for the connection between the power generation rotor 13 and the output shaft 12! !
! By adopting escape means 15, this F! The switching control of the I removal means 15 is controlled by the input rotational speed to the gear mechanism 3 υIt2I] means 1
I decided to do it by 7, so it's shot 1! IfJ2 is prevented from being over-rotated, the structure can be simplified.

Furthermore, since the output shaft 12 of the gear mechanism 3 and the power generation rotor 13 are configured to have a double shaft structure and are directly connected by the fitting/disengaging means 15, the gear mechanism 3 and the generator 2 can be integrated in the same casing 4. The equipment can be installed easily, and the ease of installation of the equipment can be improved.

As a result of the above, it is possible to downsize and lighten the entire power generation device, thereby reducing costs.

In particular, in this embodiment, the inside of the casing 4 can be opened by making the casing 4 splittable and moving the generator-side casing portion 4b onto the guide rail 20, thereby making it possible to integrate the gear mechanism 3 and the generator 2. Appropriate maintenance can also be carried out.

[Effects of the Invention] To summarize, according to the present invention, the following excellent effects are achieved.

The output shaft of the gear mechanism and the generator rotor are coaxially folded back through a fitting/uncoupling means to shorten the axial length of the power transmission system, and a control means is also provided to prevent the generator from over-rotating. By controlling the fitting and disengaging means, it is possible to downsize the entire power generation device, streamline accounting, and reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a preferred embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional example. In the figure, 1 is the water wheel, 2 is by N, and 3 is the tooth tI! Mechanism, 12
is the output shaft, and 13 is the output? [Rotor, 15 is fitting/removal means, 17
There is a means for υj. Patent Applicant Ishikawajima Harlj Heavy Industries Co., Ltd. Representative Patent Attorney Nobuo Kinutani 2Kandenm 15
Fitting/dismounting means 3 m1illJill 17 Control means Fig. 2

Claims (1)

[Claims] In a power generation device having a gear mechanism between a water turbine and a generator driven by the water turbine, the output shaft of the gear mechanism is surrounded by the outer periphery of the gear mechanism to transmit power coaxially along the axial direction of the output shaft. A hollow generator rotor is provided for transmission by folding back, and a fitting/removal means is provided between the input end of the generator rotor and the output end of the output shaft, and the input rotation speed to the gear mechanism is detected and the A power generation device characterized by comprising a control means for controlling the operation of the fitting and disengaging means.