JPS5947151B2 - Generator-directly connected flywheel device with electric starting means - Google Patents

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 starting device that uses Cyrisk to function as a starting rotation motor that also serves as 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 shaft alignment, reducing vibration, and reducing 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 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.

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

2 is a rotor, a rotor yoke is fixed to an intermediate shaft 3, and a plurality of field poles are attached to the outer circumference of this yoke.

Reference numeral 4 denotes an upper shaft directly connected to the intermediate shaft 3, and a slip ring 5 is attached thereto for supplying excitation current from an externally installed Cyrisk starter (not shown) or an excitation device.

6 is a stator, a stator winding is attached to a stator core 7,
It is supported by a stator frame 8.

An upper guide bearing 9 supports the upper shaft 4 in the radial direction, and is supported by the upper bracket 10.

11 is an intermediate guide bearing that supports the intermediate shaft 3 in the radial direction;
It is supported by an intermediate bracket 12.

Reference numeral 13 denotes a flywheel consisting of a plurality of solid discs 14, which are fastened by bolts 15 and are directly connected to the lower end of the intermediate shaft 3.

16 is a thrust collar attached to the lower end of the flywheel 13, and 17 is a thrust bearing, which supports the entire weight of the rotating part consisting of the rotor 2 and the flywheel 13.

18 is a lower guide bearing that supports the thrust collar 16 in the radial direction; 19 is this lower guide bearing and the thrust bearing 17;
The lower bracket 20 supporting the 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 Cyrisk starter, the flywheel 13 is accelerated to the rated rotational speed, and is stored as rotational inertia energy.

When necessary, the generator motor 1 is operated as a generator to convert it into electrical energy and supply it.

By the way, if an abnormality occurs in the thrust collar 16 due to an inspection or adjustment of the thrust bearing 17 or a burnout accident,
When it is necessary to disassemble, the flywheel 13 is in the lower position, so that in conventional devices the generator motor stator 8,
The thrust collar 16 could not be taken out unless the rotor 2, upper bracket 10, intermediate bracket 12, etc. were disassembled and the flywheel 13 was lifted out.

In the above-mentioned conventional device, the flywheel 13 is made up of a plurality of solid discs 14 stacked one on top of the other, and a large number of them are tightened with bolts 15. Therefore, when disassembling the thrust collar 16, etc., it is necessary to It was necessary to disassemble and take out all the parts in the holder, and then take out the flywheel 13.

In this invention, a flywheel is constructed by fitting a plurality of disks with a center hole into the outer diameter part of a cylindrical spider, and a plurality of supports are inserted into the lower part of the spider in a radial direction so as to be removable. The weight of the flywheel is supported from below by the pin, and when disassembly is required, the support pin can be pulled out and the generator can be removed without disassembling the stator on the generator side, leaving the flywheel in the pit of the foundation. It is an object of the present invention to provide a flywheel device directly connected to a generator with electric starting means, which can be lifted up and taken out together with a rotor, a flywheel spider, and a thrust collar, and which facilitates disassembly and assembly work.

FIG. 2 is a longitudinal sectional view of a flywheel device directly connected to a generator motor according to an embodiment of the present invention.
0 is the same as the conventional device described above.

21 is a cylindrical spider directly connected to the lower end of the intermediate shaft 3; 22 is a flywheel fitted into the outer diameter of the spider;
3 are stacked on top of each other.

The rotational force of the flywheel 22 is transmitted by a taper key (not shown) inserted between the flywheel 22 and the spider 21 in the axial direction.

This taper key is designed so that it can be easily pulled out by screwing a pull-out bolt into one end of the key during disassembly.

A plurality of support pins 24 are inserted in the lower part of the spider 21 in the radial direction, and support the weight of the flywheel 22 fitted into the spider 21 from below.

25 is a thrust collar attached to the lower end of the spider 21.

26 is an intermediate bracket that supports the intermediate guide bearing 11;
A plurality of arm portions 26a are removably provided radially on the outer periphery and are attached to the bottom plate of the stator frame 8.

The disc portion of the intermediate bracket 26 can be divided into a plurality of parts in the circumferential direction.

In the apparatus of the above embodiment, the thrust collar 25 section can be disassembled and inspected as follows.

First, the upper bracket 10 and the upper guide bearing 9 are removed.

Next, the arm portion 26a of the intermediate bracket 26 is removed, and the disk portion of the bracket 26 is disassembled and removed.

These removal operations can be performed through a horizontal hole (not shown) provided in the pit of the foundation 20.

Next, if the intermediate guide bearing 11 is split in the circumferential direction, it is removed; if it is circular, it is placed on the top surface of the spider 21.

Incidentally, since the outer periphery of the disk portion of the bracket 26 is smaller than the inner diameter of the stator core 7, it may be placed on the upper surface of the spider 21 together with the guide bearing 11 without being taken out separately.

As shown in FIG. 3, a plurality of jacking devices 27 are arranged on the lower bracket 19 or on a platform (not shown) placed on the bottom of the foundation, and support the lower end surface of the flywheel 22 and absorb its weight. support.

Next, pull out the taper key and pull out the support pins 2 and 4 in the direction of arrow A.

Next, as shown in FIG. 4, the spider 21 and thrust collar 25 are lifted up and taken out.

In the above embodiment, a generator motor is used as the generator with an electric starting means, but the present invention can also be applied to a generator with an electric motor for starting rotation.

Furthermore, the present invention is not limited to the above embodiments, and can be modified in various ways without changing the gist thereof.

As described above, according to the present invention, a flywheel is constructed by fitting a plurality of discs each having a center hole into the outer diameter part of a spider having the same cylindrical shape, and a flywheel is provided at the bottom of the spider so that it can be pulled out in the radial direction. Multiple support pins are inserted into the base to support the weight of the flywheel from below, so by pulling out the support pins, the flywheel can be left in the pit of the foundation and the stator on the generator side can be disassembled. The generator rotor, the flywheel spider, and the thrust collar can be lifted up and taken out as a whole without having to do anything, and the disassembly and assembly work can be facilitated.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional flywheel device directly connected to a generator motor, FIG. 2 is a longitudinal sectional view of a flywheel device directly connected to a generator motor according to an embodiment of the present invention, and FIGS. 3 and 4 are FIGS. FIG. 3 is a longitudinal cross-sectional view showing a state in which the spider and thrust collar are extended while leaving the flywheel intact. 1... Generator motor, 2... Rotor, 2
1...Spider, 22...Flywheel, 23...' disc, 23a...Center hole, 24...Support pin. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A cylindrical spider that is directly connected to the lower end of the rotor of a generator with electric starting means and a vertical shaft, and a plurality of disks provided with a center hole on the outer diameter of the spider. A generator direct-coupled flywheel with electric starting means, comprising a flywheel that is fitted into the spider, and a plurality of support pins that are removably inserted into the lower part of the spider in the radial direction and support the weight of the flywheel from below. wheel device. 2. The flywheel device directly connected to a generator with electric starting means according to claim 1, wherein the electric generator with electric starting means is composed of a generator motor.