JPS58215949A - Flywheel device - Google Patents

Abstract

PURPOSE:To improve the yield of a material by inserting radial knock pins into reamed holes radially opened from the outer peripheral surfaces of a plurality of adjacent discs which form a flywheel and clamping them with axial knock pins. CONSTITUTION:A bolt 21 which clamps a flywheel 13 and an intermediate shaft 3 is provided. And radial knock pins 22 for transmitting torque transmitted from the shaft 3 is inserted between the shaft 3 and the flywheel 13. Reamed holes are radially opened at laminated solid discs 14 from the adjacent outer peripheral surfaces, and radial knock pins 23 are respectively inserted into the holes. The pins 23 are fixed with axial knock pins 24 so as not to fly out during rotation.

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 consists of a flywheel device directly connected to a generator to which a separate starting motor is connected, or
There is one in which a flywheel device is directly connected to a generator-motor that uses a static starter device using a thyristor to serve as a starting rotation electric motor and a generator. 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 viewpoints of preventing axial orientation, reducing vibration, and reducing the installation area, there is a tendency for vertical shaft configurations to be used rather than horizontal shaft configurations.

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

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

(1) is a generator motor, which is configured as follows.

(21 is a rotor, a rotor yoke is fixed to the intermediate shaft (3), and a plurality of field poles are attached to the outer circumference of this yoke. (4) is attached to the intermediate shaft (3). A slip ring (51) is attached to the directly connected upper shaft for supplying excitation current from an externally installed thyristor starter (not shown) or an excitation device. (6) Fixed with a stator The stator winding is attached to the child core (7), and is supported by the stator frame (81). (9) is an upper guide bearing that supports the upper shaft (41) in the radial direction, and is supported by the upper bracket Ql. 01) is an intermediate guide bearing that supports the intermediate shaft (3) in the radial direction, and is supported by the intermediate bracket α.

(13) is a flywheel consisting of a plurality of solid discs I, which are fastened by bolts α9 and are directly connected to the lower end of the intermediate shaft (3).

σ6j is the thrust collar attached to the lower end of the flywheel (t3), (17) is the thrust bearing, and the rotor (2
1 and the flywheel (13).O8 is the lower guide bearing that supports the thrust collar (16) in the radial direction, (19 is the lower guide bearing that supports this lower guide bearing and the thrust bearing (1η) Lower bracket, (
A) is a foundation made of reinforced concrete.

The flywheel device directly connected to the generator motor is operated as follows. First, the generator motor (11) is started as an electric motor by excitation from the thyristor starter, and the flywheel α is accelerated to the rated rotational speed, which is stored as rotational inertia energy. It operates as a machine 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. Furthermore, since a single disk is heavy and subject to manufacturing and transportation restrictions, the disks are divided into a plurality of disks and stacked.

The positions of these plurality of disks (141) can be determined by mutually inserting them into the fitting part (26) provided in the center as shown in FIG. Since the upper and lower surfaces are ground down to provide the fitting portion, the yield of the disk itself becomes poor.

Further, since the flywheel a9 rotates at a high speed, the dynamic unbalanced mass must be minimized, so the fitting portion □□□ must be finished with very high precision.

Since the conventional flywheel device is constructed as described above, it is necessary to cut away expensive material in order to provide a fitting part on each disk I of the flywheel, resulting in a yield loss. This method has disadvantages such as poor quality, increased material weight, and the need to finish the fitting part (2) with very high precision.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional ones, and it has reamed holes co-drilled in the radial direction from the outer peripheral surfaces of adjacent discs of a plurality of discs constituting a flywheel. The purpose of this invention is to provide an inexpensive flywheel device that improves the material yield by inserting a radial knock pin into the radial dowel pin and using the axial dowel pin as a stator.

An embodiment of the present invention will be described below with reference to the drawings. Third
In the figure, CD represents the flywheel (13) and intermediate shaft (3).
) between the intermediate shaft (3) and the flywheel a3 is a radial knock pin (22) for transmitting the torque transmitted from the intermediate shaft (3) to the lower part.
1 is inserted. The solid discs αa to be stacked have reamed holes radially radially drilled from the outer peripheral surfaces of the adjacent ones, and radial dowel pins c! 3
is inserted. Also, this radial knock pin (c)
is fixed with an axial knock pin 124) so that it does not protrude outward during rotation. In this way, according to the above embodiment, the solid disk I is provided with a fitting portion (26
1 is no longer necessary, and the yield of the material is improved.

As described above, according to the present invention, the reamer holes are drilled radially from the outer peripheral surfaces of the plurality of adjacent disks constituting the flywheel.

By inserting the al knock pin and fixing it with the axial knock pin, it is possible to improve the material yield and provide an inexpensive flywheel device.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a conventional flywheel device directly connected to a generator motor, FIG. 2 is a vertical cross-sectional view showing the flywheel section of a conventional flywheel device, and FIG. It is a longitudinal cross-sectional view showing a wheel part. DESCRIPTION OF SYMBOLS 1... Generator motor, 2... Rotor, B... Flywheel, 14... Solid disc, J... Tightening bolt,
23...Radial knock pin, 24...Axial knock pin. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Makoto Kuzuno - Figure 1

Claims (1)

[Claims] +I+ 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, A flywheel device comprising: a radial knock pin that is inserted into a reamer hole co-drilled in the radial direction from the outer peripheral surface of the objects; and an axial knock pin that fixes the radial knock pin in the reamer hole. (2) The flywheel device according to claim 1, wherein a plurality of radial knock pins are arranged on the circumference of the disk and each is fixed by an axial knock pin. (3) The flywheel device according to claim 1 or 2, wherein the flywheel is directly connected to a generator.