JPS58215948A - Flywheel device - Google Patents

Abstract

PURPOSE:To improve the assembling workability of a flywheel device by providing an engaging unit on the laminates surface of respective discs and engaging a split tapered cylindrical ring between clamping bolts and through holes. CONSTITUTION:The diameter of a bolt hole 27 of a flywheel 13 is formed larger than that of a clamping bolt 15, which is inserted into the hole 27, and the flywheel 13 is clamped. Since the bolt 15 is bent outside by the centrifugal force of itself during rotation, a split tapered cylindrical ring 23 is engaged with a buckled part 25 formed on the upper surface of the flywheel disc to support the bent deformation. The part 25 is formed at the center of the flywheel disc so as not to displace the flywheel disc. In this manner, the flywheel device which has excellent workability can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flywheel device directly connected to a generator with electric starting means that converts electrical energy into inertia energy of a rotating body, stores it, and then converts it back into electrical energy and supplies it when necessary. .

This type of device is one in which a flywheel device is directly connected to a generator to which a separate starting motor is connected, or a static starting device using a thyristor is used to double the starting motor as a generator. Some models have a flywheel device directly connected to a generator motor. In either case, to obtain a large inertial effect, the diameter of the flywheel increases, and the weight can reach several hundred tons.

Therefore, from the viewpoint of preventing the shaft from running out, reducing vibration, and reducing the installation area, there is a tendency for the shaft to be constructed in a vertical shaft type rather than a horizontal shaft type.

Hereinafter, a case will be described in which both a conventional device and a device according to an embodiment of the present invention are generator motors as generators with electric starting means.

A conventional flywheel device directly connected to a vertical shaft generator/motor is shown in a vertical cross-sectional view in FIG.

(11 is a generator motor, which is configured as follows.

(2) is a rotor, to which an intermediate shaft (three rotor yokes) is fixed, and a plurality of field poles are attached to the outer circumference of this yoke.(4) is an intermediate shaft (three The upper shaft is directly connected to the upper shaft, and a slip ring (51) is attached to the excitation current from an externally installed thyristor starter (not shown) or an excitation device.(6) is the stator. , the stator winding is attached to the stator core (7) and supported by the stator frame (8). (9) is an upper guide bearing that supports the upper shaft (4) in the radial direction, and the upper bracket It is supported in a concave manner.aυ is an intermediate guide bearing that supports the intermediate shaft (3) in the radial direction, and is supported by the intermediate bracket a.

U is a flywheel consisting of multiple solid disks α,
Multiple bolts are tightened with bolt α9, and the intermediate shaft (
3) is directly connected to the bottom end of the

αe is a thrust collar attached to the lower end of the flywheel (13), and αn is a thrust bearing, which supports the entire weight of the rotating part consisting of the rotor (2) and the flywheel α (to). a8 is a lower guide bearing that supports the thrust collar αQ in the radial direction, α1 is a lower bracket that supports the lower guide bearing and the thrust bearing αη, and (a) is a foundation made of reinforced concrete.

The above-mentioned generator-motor directly connected flywheel device is operated as follows. First, the generator motor (1) is started as an electric motor by excitation from the thyristor starting device, and the flywheel a is accelerated to the rated rotational speed and stored as rotational inertia energy. It operates as a generator and converts it into electrical energy and supplies it.

Therefore, in order to store a large amount of rotational inertia energy, a large diameter and heavy flywheel is required. Moreover, one disk is heavy and is subject to manufacturing and transportation restrictions, so it is divided into a plurality of disks and stacked.

On the other hand, when tightening multiple disks, it is necessary to tighten each disk without shifting, and the bolt hole of the tightening bolt (flywheel disk α3 so that one does not bend due to its own centrifugal force) (It is configured as above 2η, but since the flywheel is heavy and has a large diameter, there is a large error in the pitch of each bolt hole (5), and on top of that, the bolt hole (5) is a reamed hole. Retaining bolt (2
There was almost no dimensional difference between the diameter of η and the diameter of the tightening bolt (151), and it was extremely difficult to assemble the two by passing the tightening bolts through the bolt holes of the multiple flywheel discs.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and in addition to providing a fitting part on the stacking surface of each disc, a split tapered cylindrical ring is provided between the tightening bolt and the through hole. The purpose of this invention is to provide a flywheel device with excellent assembly workability by inserting and inserting.

An embodiment of the present invention will be described below with reference to the drawings.

In Figure 2, (21) is a bolt that tightens the flywheel (13) and the intermediate shaft (3), and the torque transmitted from the intermediate shaft (3) is between the intermediate shaft (3) and the flywheel (13). A radial knock pin is inserted to transmit the vibration to the lower part of the flywheel. Insert the two bolts and tighten the flywheel α9.This tightening bolt α is bent outward by its own centrifugal force during rotation, so
In order to support the bending deformation, a split tapered cylindrical ring (2J) as shown in FIGS. 3 and 4 is fitted into a counterbore (24) provided on the upper surface of the flywheel disk.

Also, there is a fitting part C1 in the center of the flywheel disk! (2) is provided to prevent the flywheel disks from shifting.

Next, the procedure for assembling the flywheel device configured as described above will be explained with reference to FIG.

First, place the flywheel (
Place the first piece on the solid disc side of 1■ and tighten it) (26
1, tighten the thrust collar (161) and the solid disc α→.Next, tighten the tightening bolts α into the bolt holes (27
). Then, a split taper cylindrical ring as shown in Figs. 3 and 4 is inserted into the counterbore (24) provided on the top surface of the solid disc (14), and the tightening bolt a powder is fixed. .

Hereafter, the solid disks I are stacked one by one while matching the fitting parts,
Counterbore (Insert the split tapered cylindrical ring (231 into the 24th part, and finally loosen the tightening bolt αω) (tighten with 281).

Furthermore, insert the radial knock pin t23 into the upper surface of the uppermost solid disk α, place the intermediate shaft (3) on it,
Tighten the tightening bolt (211) to connect.

Further, the present invention is not limited to the above-mentioned embodiments, but can be modified in various ways without changing the gist thereof.

As described above, according to the present invention, a fitting portion is provided on the stacking surface of each disk, and a split tapered cylindrical ring is fitted between the tightening bolt and the through hole, thereby improving assembly work. can provide excellent flywheel equipment.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a conventional flywheel device directly connected to a generator motor, FIG. 2 is a vertical sectional view of a flywheel device according to an embodiment of the invention, and FIGS. 3 and 4 are similar to FIG. 2. FIG. 2 is a plan view and a vertical cross-sectional view of a split-type tapered cylindrical ring constituting the main part of the flywheel device. 14... Solid disc, 15... Tightening bolt, 23...
- Split type tapered cylindrical ring, 24... counterbore, 25... fitting part, 27... bolt hole. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Makoto Kuzuno

Claims (1)

[Scope of Claims] (1) In a flywheel constructed by stacking a plurality of disks in the axial direction and connecting them with a plurality of tightening bolts passing through the outer circumference in the axial direction, each of the above-mentioned circles A flywheel device characterized in that a fitting portion is provided on the stacking surface of the plates, and a split tapered cylindrical ring is fitted between the tightening bolt and the through hole. (The flywheel device according to claim 1, wherein the 21-segment tapered cylindrical ring is fitted into a counterbore formed at the entrance of the through hole. (3) The flywheel is The flywheel device according to claim 1 or 2, characterized in that it is directly connected to a generator.