JPS634410B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention converts electrical energy into rotational inertia energy of a flywheel, stores the energy, and converts it back into electrical energy when necessary to release the energy. do,
This invention relates to a flywheel device directly connected to a generator motor.

[Conventional technology]

A conventional device of this type is shown in a schematic vertical sectional view in FIG. 1 is a generator motor,
It is structured as follows. A rotor 2 has a magnetic pole core and a field winding (both not shown), and is fixedly supported by the rotating shaft 3. 4 and 5 are rolling bearings, and 6 is a stator, which has a stator core and stator windings (both not shown), and is fixedly supported by a stator frame 7. 8 and 9 are brackets. Reference numeral 10 denotes a flywheel, which is fixed to a rotating shaft 11, and this rotating shaft is attached to the rotating shaft 3.
They are directly connected by a pair of shaft joints 12. 13 is a sealed frame that accommodates the flywheel 10;
4 and 15 are upper and lower brackets, bearings 16 and 1
7 supports the flywheel 10. Reference numeral 18 denotes a disk-shaped electromagnet that faces the upper end surface of the flywheel 10 with a predetermined gap, and a concentric excitation coil 19 is attached to the electromagnet 18, and a plurality of load transducers arranged in the circumferential direction. It is supported on the sealing frame 13 side via 20.

Reference numerals 21 and 22 denote a pair of upper and lower non-contact seal ring shaft sealing devices, which together with the sealing frame 13 hermetically surround the flywheel 10 to form a vacuum chamber 26. The shaft seal devices 21 and 22 are constructed as follows.
Numerals 23 and 24 are sealing frames that are airtightly fixed to the sealing frame 13 and partitioned into a vacuum, and have annular storage chambers 23a and 24a formed on the inner diameter side, respectively. 25 is stored in these storage chambers with a gap between them, and a pair of upper and lower seal rings surrounding the outer circumference of the rotating shaft 11 with a predetermined small gap are press-fitted into the storage chambers 23a and 24a. The shaft is kept in a floating state by the sealing oil contained therein, and the shaft is sealed in a non-contact manner, thereby preventing outside air from entering the vacuum chamber 26. Note that the oil supply passages for sealing oil to the storage chambers 23a, 24a and each seal ring 25 are floated to connect each storage chamber and the rotating shaft 1.
1 is omitted from illustration.

In the above conventional device, the flywheel 10
Most of the weight of the vacuum chamber 2 is borne by the attraction force of the electromagnet 18, minimizing the thrust load of the rolling bearings 16 and 17 and reducing bearing friction loss.
By reducing the windage loss due to the rotation of the flywheel 10 by using the vacuum of No. 6, the utilization efficiency of the stored rotational inertia energy is increased.

[Problem that the invention seeks to solve]

In the conventional device, the rotor 2 of the directly connected generator motor 1 rotates in the air, and as the rotation speed increases, the windage loss increases, reducing the efficiency of using energy storage. It was hot.

This invention was made to solve the above-mentioned problems, and even if the rotational speed of the rotor 2 increases, the windage loss does not increase, and the efficiency of using energy storage is not reduced. The purpose is to provide a flywheel device that does not require a flywheel device.

[Means for solving problems]

In the device according to the present invention, the rotor of a generator motor is rotated together with a flywheel in a vacuum chamber, and one end of a heat pipe is embedded radially in the rotor, and the other end is disposed outside the vacuum chamber.

[Effect]

In this invention, since the rotor is rotated in a vacuum, an increase in windage loss is suppressed, and since the rotor is cooled with a heat pipe, an increase in temperature of the rotor is also prevented.

〔Example〕

FIG. 1 is a longitudinal sectional view of a flywheel device directly connected to a generator motor according to an embodiment of the present invention.
6, 8, 10, 15, 17, 18-20, 22,
24, 24a, and 25 are the same as those in the conventional device described above. The flywheel 10 is a sealed frame 30
is housed in. Rotor 32 of generator motor 31
is fixed to a rotating shaft 33 common to the flywheel 10, surrounded by a sealed stator frame 34 and a shaft sealing device 36, and is commonly formed by the sealing frame 30 and shaft sealing device 22 on the flywheel side. inside the vacuum chamber 40. The rotor 32 is provided with a heat pipe 35 for cooling. One end of the heat pipe 35 is embedded radially within the rotor 32, and the other end passes through the rotating shaft 33 and is exposed to the outside for cooling. The shaft sealing device 36 is based on a non-contact sealing ring and is constructed as follows.
A sealing frame 37 is airtightly fixed to the stator frame 34 to partition the stator frame 34 into a vacuum, and has an annular storage chamber 37a formed on the inner diameter side. 38 is a seal ring which is stored in this storage chamber with a gap and surrounds the outer circumference of the rotating shaft 33 with a predetermined gap.
The sealing oil press-fitted into the storage chamber 37a makes the shaft floating and seals the shaft in a non-contact manner, thereby preventing outside air from entering the vacuum chamber 40 from above. In addition, the storage room 37a
The sealing oil supply path and the collecting and discharging means for the leaking sealing oil are not shown.

A stator frame 34 is airtightly attached to the sealing frame 30, and a vacuum chamber 40 formed by the shaft sealing devices 22 and 36 is evacuated by an external vacuum pump device.

In the apparatus of the above embodiment, after the vacuum chamber 40 is evacuated, the generator motor 31 is operated to rotate the flywheel 10, and electrical energy is stored as rotational inertia energy. This stored rotational inertia energy is used by the generator motor 10 when necessary.
It is released as electrical energy by operating a generator.

Since flywheel 10 and rotor 32 rotate in a vacuum, windage loss is significantly reduced. Furthermore, the electrical heat generated in the rotor 32 is transferred to the heat pipe 3
5, the heat is transferred to the cooler outside air and dissipated,
cooled down. One end of the heat pipe 35 is connected to the rotor 3
The refrigerant liquid inside moves to one end along with the centrifugal action, exchanges heat with the high temperature part of the rotor 32, and vaporizes. This increased temperature of the gas is caused by the rising effect due to thermal expansion and by the heat pipe 35.
It easily reaches the other end of the heat pipe 35 due to the attraction effect caused by the low pressure in the other end of the heat pipe 35, where it exchanges heat and liquefies. In addition, in the above embodiment, the rolling bearing 4,
If a means is provided that allows lubrication of the rotary shaft 33 to be carried out without any trouble in a vacuum, seal end covers are installed airtightly on the upper part of the bracket 8 and the lower part of the bracket 15, respectively, and the upper and lower shaft ends of the rotating shaft 33 are sealed. The enclosure may be configured to be sealed off from outside air, and the shaft sealing devices 22 and 36 may be omitted.

Further, in the above embodiment, the rotor 32 and the flywheel 10 are fixed to the common rotating shaft 33, but they may be separate rotating shafts and directly connected by a shaft joint.

〔Effect of the invention〕

As described above, according to the present invention, the rotor of the generator motor is rotated together with the flywheel in a vacuum chamber, and one end of the heat pipe is embedded radially in the rotor and the other end is placed outside the vacuum chamber. , it is possible to suppress an increase in windage loss due to an increase in rotational speed, and also to prevent a rise in temperature of the rotor.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional view of a flywheel device directly connected to a generator motor according to an embodiment of the present invention, and FIG. 2 is a schematic vertical sectional view of a conventional flywheel device directly connected to a generator motor. 10... Flywheel, 22... Shaft sealing device, 30
...Sealing frame, 31... Generator motor, 32... Rotor, 33... Rotating shaft, 34... Stator frame, 36
...Shaft sealing device, 40...Vacuum chamber. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A vacuum chamber is formed by sealing the inside of the sealed frame housing the flywheel and the stator frame of the generator motor from the outside air, and the rotor of the generator motor is rotated together with the flywheel in a vacuum, and the rotor A flywheel device directly connected to a generator motor, characterized in that one end of a heat pipe is buried in a radial manner, and the other end is arranged outside the vacuum chamber.