JPS62298667A - flywheel power supply - Google Patents

Abstract

PURPOSE:To enhance stability of a flywheel in low revolving speed range by giving a greater contour to the lower part of a flywheel, whose upper part accommodates the rotor of a generator and motor, and thereby locating the center of gravity in the lower part of the flywheel. CONSTITUTION:A flywheel power unit device designed to operate responding to power failure for a short time includes a flywheel 20 which rotates when current is supplied to a stator 4 constituting a generator and motor, together with a rotor 3. If power is interrupted by momentary power failure, the rotor 3 and stator 4 function as a generator, wherein the rotational energy of the flywheel 20 is converted into electric energy and supplied. Here the upper part of the flywheel 20 accommodates the rotor 3, and the lower part of the flywheel 20 is given a greater contour so as to locate the center of gravity in lower part of the flywheel 20. This enhances rotational stability of flywheel 20 during low speed operation, and damage to lower bearing 6 is reduced.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a flywheel power supply equipment designed to be able to cope with short-term power outages by using a flywheel. be.

[Conventional technology]

Although long-term power outages occur very rarely, power outages lasting for example seconds due to shocks such as lightning strikes occur quite frequently. However, even in such a momentary power outage (instantaneous power outage), electronic devices such as FA controllers, process control computers, and sequencers, which are always online, are affected by this instantaneous power outage. Noh performances may be stopped entirely.

The flywheel power supply device was developed as a countermeasure against such instantaneous power outages, and is a highly reliable power supply device that uses a rotary Ws8 system that uses a flywheel instead of a conventional battery.

Figure 2 is a cross-sectional view of the flywheel power supply device (1
) is the casing, (2) is the flywheel, (2a) is the upper rotating shaft, (2b) is the lower rotating shaft, (3) is the rotor,
(4) is the stator, (4a) is its iron core, (4b) is the coil, (5) is the upper bearing, (5al is the bearing metal,
(6) is the lower bearing, (7) is the lubricating oil, (8) is the bearing box,
(9) is the stator holding stand, (11) I! is the magnetic bearing, and (11) I!
: Cooling fins.

In the figure, an iron core (4a), a coil (4b), and a twisted stator (4) are held on a stator holding stand (9) attached to the lower part of a casing (1) kept in a vacuum.

A flywheel (2) with a built-in rotor (3) corresponding to this stator (4) has an upper rotating shaft (2a) and a lower rotating shaft (2b) connected to an upper bearing (5) and a lower bearing (6), respectively. Supported. There is some clearance between the bearing metal (5&) of the upper bearing (5) and the upper rotating shaft (2a), and the lower bearing (6) is a spherical bearing.

The stator (4) attached to the casing (1) and the rotor (3) built into the flywheel (2) constitute a generator motor, so by supplying power to the stator (4), the flywheel (2) ) starts rotating. While the initial rotation speed is low, the preset upper rotating shaft (2a) of the flywheel (2) is rotating in contact with the bearing metal (5a) of the upper bearing, but as the rotation speed increases and the number of rotations exceeds several thousand. When the RPM is reached, the gyroscopic effect of the flywheel (2) causes the upper rotating shaft (2 &) to move towards the upper bearing metal (5
&), and the flywheel (2) rotates upright only by supporting the spherical surface at the tip of the lower rotating shaft (2b) on the lower bearing (6). In addition, the lower rotation shaft (3b)
The tip of the flywheel (2) and the lower bearing (6) are in metal contact when the flywheel (2) is stopped;
) starts rotating, the lubricating oil (7) is drawn into the spiral groove of the lower bearing (6), and the tip of the lower rotating shaft (2b) rotates on the oil film of the bearing (6).

When the power supply stops due to a momentary power outage, the rotor (3) and stator (4) act as a generator, and the rotational energy of the flywheel (2) is converted into electrical energy and sent out, so even if a power outage occurs, there is no power supply. Supply never stops.

The magnetic bearing is used to stabilize the rotation of the flywheel (2) and to attract the flywheel (2) upward by magnetic force.

[Problem that the invention seeks to solve]

By the way, in the above-mentioned flywheel power supply device, the structure of the flywheel (2) is that the outer diameter of the upper part is increased to have the function of a flywheel, and the rotor of the generator motor is housed in the lower part. 2) The center of gravity is high <;, t )), and as a result, the stability of the flywheel is impaired in the low rotation speed range. Moreover, as a result, the lower bearing (6) that supports the lower rotating shaft (2b) of the flywheel is frequently damaged, and the life of the bearing (6) is shortened.

The present invention was made in order to solve the above-mentioned problems of conventional devices, and aims to provide a flywheel power supply device that improves the stability of the flywheel during rotation and extends the life of the bearing. be.

[Means for solving problems]

In order to achieve the above object, in the flywheel power supply device according to the present invention, a stator holding base for holding the stake is mounted in the upper part of the casing, a rotor corresponding to the stator is built in the upper part of the flywheel, and the flywheel The outer diameter of the lower part of the wheel has been increased.

[For production]

As a result, the center of gravity of the flywheel is thicker (moved downward) compared to conventional flywheels, and stability in the low rotation speed range of the flywheel is greatly improved.
This prevents damage to the lower bearing that supports the flywheel's lower rotating shaft, extending its lifespan.

[Embodiments of the invention]

FIG. 1 is a sectional view of a flywheel power supply device showing an embodiment of the present invention, and (1) to 00) in the figure are the same as those of the conventional device.
Or equivalent parts, (20) is a flywheel, (20a)
(20b) is a lower rotation shaft, and (21) is a stator holding base.

As shown in the figure, the rotor (3) of the generator motor is housed in the upper part of the flywheel (20), and the outer diameter of the lower part is increased to position the center of gravity of the flywheel (20) downward. As a result, when the flywheel (20) rotates, the stability of the flywheel (20) is improved even in the low rotation speed range, and damage to the lower bearing (6) that supports the lower rotating shaft (20b) is reduced, reducing its lifespan. has been significantly extended.

〔Effect of the invention〕

In the present invention, the flywheel used in the flywheel power supply device houses the rotor of the generator motor in the upper part, increases the outer diameter of the lower part, and positions the center of gravity of the flywheel downward. The flywheel stability has also been improved, damage to the lower bearing that supports the lower rotating shaft has been reduced, and its lifespan has been extended.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a flywheel power supply device showing an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional flywheel power supply device. In the figure, (1) is the casing, (6) is the lower bearing, (7) is the lubricating oil, (20) is the flywheel, (20a) is its upper rotating shaft, (20b) is its lower rotating shaft, (21) is the stator holding stand. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] A casing, a stator holder installed in the casing and holding a stator, a flywheel having a rotating shaft that projects up and down, and an upper support and a lower support that support the rotating shaft. and a generator-motor section constituted by the stator and a rotor built in at a position corresponding to the stator in the flywheel, wherein the stator holding stand is mounted on the upper part of the casing, and A flywheel power supply device characterized in that a rotor corresponding to the stator is built into the upper part of the flywheel, the diameter of the lower part of the flywheel is increased, and the center of gravity of the flywheel is positioned downward.