JPS62103479A - Flywheel device - Google Patents

Abstract

PURPOSE:To protect a casing securely and effectively by absorbing the energy of a broken and scattered rotary body by a rotatable protective ring when a force more than a certain value is applied to said rotary body. CONSTITUTION:A protective ring 22 is rotatably held by the resilient force of the leaf spring 23 and the stepped part 21a of a casing 21, while an abnormality detecting sensor 25 is insertingly engaged with the ring 22, with both ends of it being connected to a control circuit. If a rotary body is rotated at an unusually high speed due to the failure of a control unit and the like, being subjected to a centrifugal force more than the limit of its stress, the rotary body is broken and scattered and finally is brought into contact or collides with the protective ring 22. However, since the protective ring 22 is rotatable, it is rotated by this contact or collision, absorbing the breaking energy. Further, the abnormality detecting sensor 25 is cut off due to the rotation of the protective ring 22 and, thereby, dynamic brake is applied to the rotary body, lowering the unusually high speed rotation. Accordingly, the casing can be protected securely and effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flywheel device capable of absorbing rotational energy during abnormal rotation of a rotating body.

[Conventional technology]

FIG. 3 is a sectional view of a conventional flywheel device. In the figure, 1 is a casing, and a rotating body 2 is housed within this gauging 1.

The rotating body 2 includes a part of the flywheel 3 and a lower flywheel rotor (hereinafter referred to as
It consists of 4 (referred to as rotor).

The rotating body 2 is vertically supported within the gauging 1 by a lower spherical spherical spherical bearing 5 and an upper bearing 6.

The upper bearing 6 is disposed at a constant interval from the rotating shaft 3a of the flywheel 3, and when the rotating body 2 rotates at high speed, the upper bearing 6
and the rotating shaft 3a do not come into contact with each other. The lower spherical snow P spiral bearing 5 is attached to the rotor 4 which is vertically installed.
It is disposed at the lower part of the rotating shaft 4a of the rotor 4, and has a spherical recess 5a. 7 is a plurality of rotor magnets fixed to the lower inner wall of the rotor 4, 8 is a stator,
It consists of a fixed iron core 8a and a stator coil 8b. 9 is a protection ring fixed to the inner wall of the casing 1 with, for example, bolts, 10 is a temperature sensor attached to the protection ring 9, and 11 is a fixture fixed to the casing 1 to fix the bearing 5.

Next, the operation will be explained. This flywheel device normally functions as an electric motor, and when a voltage is applied to the coil 8b of the stator 8 from an external power source, the rotating body 2 rotates in the direction of the arrow (A) and stores energy. do.

On the other hand, in the event of an abnormality such as an external power source, the flywheel device acts as a generator, and uses the energy stored in the rotating body 2 to supply power from the stator 8 to a load, such as a CPU, to power the power outage compensation device. used as. Therefore, it is necessary to store sufficient energy in the flywheel device under normal conditions, and the rotating body 2 rotates at a high speed.

[Problem that the invention seeks to solve]

The conventional flywheel device is configured as described above,
Since the protective ring 9 is completely fixed to the casing 1, if the protective ring 9 and the rotating body 2 seize or, for example, the rotating body 2 rotating at high speed due to a failure in the control device, etc. Further, due to high rotation, if the outer circumference expands due to abnormal centrifugal force and collides with or bites into the protective ring 9, there may be problems such as the additional legs of the casing 1 being destroyed by the rotational energy of the rotating body 2. Ta. Further, although the temperature sensor 10 is used, there are problems such as a complicated control circuit.

This invention was made to solve the above-mentioned problems, such as damage to the rotating body due to abnormally high rotation,
It is an object of the present invention to provide a flywheel device capable of effectively protecting a casing by absorbing flying energy by the rotation of a protection ring that rotates when a force of more than a predetermined value -L is applied.

[Means for solving problems]

The flywheel device according to the present invention protects the casing by absorbing the scattering energy of the rotating body broken and scattered due to abnormally high rotation by a protection ring that rotates when a force exceeding a predetermined level is applied.

[Effect]

The flywheel device according to the present invention is arranged on the inner wall of the casing, and when a predetermined force or more is applied, the rotatable protective ring is destroyed and rotates due to collision with scattered fragments of the rotating body, and the resulting energy is It is something that absorbs.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same or corresponding parts as in FIG. 3 are designated by the same reference numerals. In FIG.
1a is formed.

Reference numeral 22 denotes a protection ring, which, unlike the conventional one, is not completely fixed to the casing 21 but is rotatably engaged with the casing 21. Reference numeral 23 denotes a leaf spring fixed to the protective ring 22 by, for example, a bolt 24, and as shown in FIG. , and a claw 23b that engages with the hole 22a of the protection ring 22 at the rear end.

Here, the horizontal length fat of the leaf spring 23 in the free state as shown in the third figure, and the casing 21 as shown in the second figure.
and the length bl to the wall of the hole 22a is b >
There is a relationship of a. Therefore, the protective ring 22 of the leaf spring 23
When fixed, the leaf spring 23 is configured to generate an elastic force, and this elastic force engages the protective ring 22 with the gauging 21 with a predetermined pressing force. Therefore, the predetermined pressing force here is such that, for example, the rotating body 2 does not rotate during transportation. The protection ring 22 is formed by the elastic force of the leaf spring 23 and the stepped portion 21a of the casing 21.
When engaged with the casing 21 and subjected to a predetermined external force such as a contact 5 collision of the rotating body 2, the casing 21 rotates without applying a predetermined frictional force between the casings 21. 23b is a bolt insertion hole, and 25 is an abnormality detection sensor made of, for example, a normal lead wire, which is inserted into and engaged with the hole 22a of the protective ring 22, and both ends of which are connected to a control circuit (not shown).

Next, the operation will be explained.

In normal times, the rotating body 2 is rotated by the electromagnetic action of the rotary magnet 7 and the stator 8, as in the case of a double series.
, 4a as the center and rotates at high speed with the upper bearing 5.61-.

By the way, as described above, when the rotating body 2 rotates even higher and reaches an abnormally high rotation rate due to, for example, a failure in the control device, the rotating body 2 receives a centrifugal force at the stress limit point, and the outer periphery expands.
It breaks, scatters, and finally contacts and collides with the protection ring 22.

However, in this invention, the protection ring 22 is engaged only by the elastic force of the leaf spring 23 and can be rotated by external force exceeding a predetermined value, so that it rotates due to contact or collision.
This rotation can absorb 11-ta destructive energy.

Furthermore, the rotation of the protection ring 22 disconnects the abnormality detection sensor 25, which applies a dynamic brake to the rotating body 2 to reduce abnormal rotation. In this way, the control circuit is simpler than the conventional one and can be manufactured at low cost.

Note that the number of the leaf springs 23 may be one or more.

〔Effect of the invention〕

As described above, this invention is configured so that when a force exceeding a predetermined value is applied, the rotatable protection ring absorbs the energy of the broken or scattered rotating body, so that the casing can be reliably and effectively It has the effect of providing physical protection.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a perspective view of a temporary spring, and FIG. 3 is a longitudinal sectional view of a conventional device. 1.21 is a casing, 2 is a rotating body, 22 is a protection ring, 23 is a temporary spring, and 25 is an abnormality detection sensor. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Figure 1 Figure 2 Figure 3 (a) ■

Claims (2)

[Claims] (1) In a flywheel device having a rotary body that is rotatably supported in a casing and stores rotational energy, a leaf spring is provided on a protection ring rotatably disposed on the inner wall of the casing, A flywheel device characterized in that a leaf spring is made to spring against the inner wall of the casing, and the protective ring can be rotated when a predetermined force is applied. (2) The flywheel device according to claim 1, further comprising an abnormality detection sensor connected to the protective ring, which is disconnected by rotation of the protective ring and detects an abnormality.