JPH0433419Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a thrust support structure for a power generation device, and more particularly, to a thrust support structure for a power generation device that improves structural soundness and facilitates maintenance.

[Prior Art] Various configurations are adopted for power generation devices depending on the intended use thereof. For example, as shown in FIG. 2, a gear mechanism c is connected between a water wheel a and a generator b,
A device is known that ensures the necessary rotation to the generator b.

Conventionally, in such a power generation device, the following structure has been adopted in order to support the thrust load applied to the rotating shaft system d that transmits the rotational force of the water turbine a to the generator b. That is, in order to receive the thrust load closer to the water wheel a than the gear mechanism c, the gear mechanism c
A thrust bearing box f is provided with a thrust bearing e in the front stage thereof, and a thrust bearing box f, on which a thrust load acts in order to accommodate this thrust bearing e, is located in the axial direction of the rotation shaft system d from a fixed wall g such as a side wall through which the rotation shaft system d passes. It is supported by a sleight support h extending along the .

Note that the thrust bearing box f is formed integrally with the gear box i from the viewpoint of simplifying the structure, and these boxes f, i
The entire weight of the gear box i is supported on the floor by a support post k hanging down from a flange j formed on the gear box i. The rotating shaft system d is composed of a drive shaft m connected to a water wheel a and a gear shaft h connected to a gear mechanism c, and these shafts m and n are connected between a fixed wall g and a thrust bearing box f. They are connected by a flange coupling p interposed between the two. This flange coupling p is formed with a large outer diameter approximately corresponding to the thrust bearing box f in order to transmit large torque.

[Problems to be solved by the invention] By the way, in the conventional thrust support structure, regarding the installation of the thrust support h on the thrust bearing box f side, it is possible to simplify the installation work by simultaneously installing the thrust support h with the support post k, and to improve the thrust support. In order to avoid interference between the thrust support h and the flange coupling spring p, the thrust support h is extended to the flange part j of the gear box i, taking into account that it needs to be large enough to surround the thrust bearing box f. I was trying to install it.

However, if the thrust support h is extended and attached to the gear box i in this way, the length of the thrust support h becomes long, and the axial rigidity decreases, which may induce the occurrence of axial vibration of the rotating shaft system d. It was hot. Furthermore, if the thrust support h is extended to the gear box i, the thrust bearing box f will be located inside the thrust support h, and the work to open the thrust bearing box f will be complicated, such as having to remove the thrust support h for maintenance etc. There was a problem with becoming.

[Means for Solving the Problems] The present invention provides a rotating shaft system that penetrates a fixed wall and is inserted into an adjacent thrust bearing box via a flange coupling to transmit the rotational force of a water turbine to a generator. In structures for supporting thrust loads,
A slite support is provided that surrounds the rotating shaft system including the flange coupling spring from the outside in the radial direction and extends from the fixed wall to the thrust bearing box to support the thrust load of the rotating shaft system. In order to expose it to the public,
A mounting flange portion for attaching the slite support is formed at the end edge of the thrust bearing box close to the fixed wall.

[Function] Next, to describe the function of the present invention, a mounting flange is formed at the edge of the thrust bearing box near the fixed wall, and a thrust support is spanned between the mounting flange and the fixed wall. This allows the thrust support to be shortened while appropriately supporting the thrust load of the rotating shaft system, and to expose the thrust bearing box to the outside of the thrust support.

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

As shown in FIG.
A rotating shaft system 3 is provided for transmitting power to the thrust bearing 5 and the generator 2 in order from the fixed wall 4 side such as a side wall through which the rotating shaft system 3 passes. A gear mechanism 6 is provided in series to ensure the rotational speed. The gear mechanism 6 and the thrust bearing 5 are housed in a gear box 7 and a thrust bearing box 8, respectively, and the gear box 7 and the thrust bearing box 8 are integrally formed. And these boxes 7,
8 has its entire weight supported by a support post 11 that stands up from the floor 9 and is attached to the flange portion 10 of the gear box 7. On the other hand, the rotating shaft system 3 mainly includes a drive shaft 12 connected to one end of the hydraulic shaft 1 and the other end extending through the fixed wall 4 and a thrust bearing box 8 to be connected to the gear mechanism 6. Gear shaft 1 to be inserted
3, and these drive shaft 12 and gear shaft 13 are connected to a fixed wall 4 and a thrust bearing box 8 adjacent thereto.
A flange coupling 14 having a size approximately equivalent to that of the thrust bearing box 8 is connected thereto. The above configuration is substantially the same as the conventional one.

In the power generating device configured in this manner, a mounting flange portion 15 is formed on the end edge portion 8a of the thrust bearing box 8 adjacent to the fixed wall 4 so as to be larger than the outer diameter of the flange coupling 14. In this embodiment, the mounting flange portion 15 is formed by expanding the end wall of the thrust bearing box 8 closest to the fixed wall 4 and facing each other radially outward. The mounting flange portion 15 of this thrust bearing box 8
A flange coupling 1 is provided between the fixed wall 4 and the fixed wall 4.
A cylindrical thrust support 16 having a frame structure is provided that surrounds and spans the rotating shaft system 3 including the rotating shaft system 3 from the outside in the radial direction, and supports the thrust load of the rotating shaft system 3.

Next, the operation of the embodiment will be described.

The rotational force of the water turbine 1 is transmitted to the generator 2 via the rotating shaft system 3 and the gear mechanism 6 to drive it. At this time, the thrust load of the rotating shaft system 3 is received by the thrust bearing 5, and is further supported by the thrust support 16 via the thrust bearing box 8.

According to the above-mentioned configuration, the thrust support 16 can be shortened compared to the conventional case where the thrust support 16 is attached to the flange part of the gear box, and its axial rigidity is increased to reduce the axial vibration occurring in the rotating shaft system 3. It can be suppressed.
Furthermore, since the thrust support 16 is installed at the end edge 8a of the thrust bearing box 8 adjacent to the fixed wall 4, most of the thrust bearing box 8 on the side opposite to the fixed wall 4 is mounted outside the thrust support 16. The thrust bearing box 8 can be easily opened for maintenance or the like.

[Effects of the Invention] In summary, the present invention provides the following excellent effects.

(1) By forming the mounting flange on the edge of the thrust bearing box close to the fixed wall, the length of the thrust support spanned between the fixed wall and the fixed wall can be shortened, improving rigidity and suppressing vibration generation. .

(2) Additionally, the thrust bearing box can be exposed to the outside of the slite support, making maintenance easier.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a preferred embodiment of the present invention;
FIG. 2 is a configuration diagram showing a conventional example. In the figure, 1 is water monomer, 2 is a generator, 3 is a rotating shaft system,
4 is a fixed wall, 8 is a thrust bearing box, 8a is an edge thereof, 14 is a flange coupling, 15 is a mounting flange, and 16 is a thrust support.

Claims (1)

[Scope of utility model registration request] In a structure for supporting the thrust load of a rotating shaft system that penetrates a fixed wall and is inserted into an adjacent thrust bearing box via a flange coupling to transmit the rotational force of a water turbine to a generator, the flange coupling as described above A thrust support is provided to support the thrust load of the rotating shaft system by surrounding the rotating shaft system from the outside in the radial direction from the fixed wall to the thrust bearing box, and the thrust support supports the thrust load of the rotating shaft system. A thrust support structure for a power generator, characterized in that a mounting flange portion for attaching the thrust support is formed on an edge portion of the thrust bearing box adjacent to the fixed wall so as to expose the thrust support to the outside.