JPS61149646A - Variable weight flywheel - Google Patents

Abstract

PURPOSE:To enable wasteful consumption of energy to be prevented when a rotary speed is changed, by utilizing a characteristic of magnetic fluid so as to change weight of a flywheel and enabling the weight of the flywheel, being left as in a rotary condition, to be variably controlled. CONSTITUTION:If circulated magnetic fluid 30 is excited by electrifying an electromagnetic coil 23, the magnetic field is generated in a tank 22, and a magnetic material in the fluid 30 receives attractive force, causing the magnetic material in the tank 22 to be deflectively distributed. Thus a flywheel, returning to an outer shell 11 the magnetic fluid decreasing magnetic material density, decreases moment of inertia by a corresponding degree if a rotary speed is equal. While the flywheel, when its moment of inertia is increased, only requires the electromagnetic coil 23 to be demagnetized. Accordingly, wasteful consumption of energy is prevented when the rotary speed is changed.

Description

[Detailed Description of the Invention] [Field of Edge Technology] The present invention relates to a variable weight flywheel, and more specifically, it is possible to change the weight of a liquid contained in a hollow flywheel and control the inertia of the shape coil due to centrifugal force. This invention relates to a variable weight flywheel.

[Prior art]

The flywheel, which is attached to the rotating shaft of the inner set, uses its inertia to equalize the rotational speed and to utilize the stored energy. In order to maintain a certain level of inertia, flywheels that can adjust the inertia have been developed.

Figures 2 and 3 show an example of a conventional flywheel that can change the inertial force (see Japanese Patent Application Laid-Open No. 54-401170). It is a flywheel constructed by combining discs, and rotary shafts 2A and 2B provided at both ends of the flywheel are supported by bearings 3A and 3B, and are directly connected to a prime mover 5 via a coupling 4.

Thus, in this example, by changing the combination of the M number of discs, the moment of inertia of the flywheel l can be reduced to S.

In addition, in Fig. 3, a fluid 7 is injected into a drum-shaped flywheel outer shell 6, and the centrifugal force based on the rotation of the outer flywheel #6 forms the fluid 7t into an annular shape as shown in the figure. In this example, the fluid 7 is injected or drained through the provided water inlets; Fl'8A and 8B. By doing so,
The moment of inertia can be changed by adjusting the amount of fluid 7.

However, with such conventional flywheels, operation is stopped every time the moment of inertia is changed.
In the case of Fig. 2, it is necessary to disassemble 1 t of flywheel each time the moment of inertia is changed, and in the case of Fig. 3, it is necessary to pour and drain each time, and the flywheel must be disassembled each time the moment of inertia is changed. It is not possible to change the amount of fluid 7 in the faG outside the wheel.

However, in general flywheels, the pulsation due to torque fluctuations becomes large, especially at low rotation speeds, so the rim, that is, the outer periphery, is required to be heavy. The heavy T-colander and rotating cone were changed! This results in a VMm of black energy in the j, which worsens the responsiveness of the rotation speed.

In other words, from this point of view, although it is desired that the rim be heavy when the engine rotates at low speeds and become light in the high speed range, it is not possible to change the conventional flywheel as described above. However, such a ffjJil was ineffective.

〔the purpose〕

The purpose of the present invention is to take note of the conventional point B, and to solve the problem, it is an object of the present invention to make it possible to change the weight of the flywheel by utilizing the characteristics of magnetic fluid.
To provide a flywheel of variable weight whose weight can be changed as required while in a rotating state.

[Section]

In order to achieve such an object, the present invention includes a hollow flywheel outer shell fixed to a rotating shaft, an introduction device for introducing magnetic fluid into the outer shell, and an opening in the rim portion of the outer shell. A return device that is firmly attached to the supporting side of the rotating shaft and guides the fluid from the opening to the outside by using the pressure of the fluid biased against the rim part by centrifugal force, and is connected to the introduction device and the return device. 5 is an electromagnetic coil that is required to weaken the inertial force of the flywheel. The electromagnetic coil is energized to increase the concentration of magnetic material in the tank provided outside the flywheel, and to reduce the concentration of magnetic material in the magnetic fluid inside the flywheel. The concentration within the wheel is increased, thereby changing the weight of the fluid within the flywheel.

[Yi geese example]

Hereinafter, key aspects of the present invention will be explained in detail and specifically based on one drawing.

FIG. 1 shows an embodiment of the present invention, in which 11 is a hollow flywheel outer shell fixed to a U-rotating shaft 12, the 1-rotating shaft 12 is pivotally supported by a case 13, and the rotary shaft 12 is pivotally supported by a case 13; 1
An internal combustion engine (not shown) is attached to either end of the engine 2.

11C is the flywheel outer shell! It is a bill internal material disposed, for example, radially (in Uzuma S, there is a rotation difference between F/W rotation and fluid rotation) from the center side of the shell body on the case 13 side toward the rim portion 1jA. , when the magnetic fluid 30 is supplied into the outer shell 11 from the center of the outer shell 11 as described later, the fluid 30 is
to easily rotate in tandem with the outer shell 11 within the flywheel.

Reference numeral 14 denotes a cylindrical return passage member which is disposed concentrically with the rotating shaft 12 in the outer shell 11 and whose one end is fixed to the case 13, and a double-barreled return pipe is attached to the free end side of the passage member 14. 15
For example, the return pipes 15 are connected radially so that the tips of the return pipes 15 are opened to the rim part 11A of the outer shell 11,
Further, these return pipes 15 are connected to a liquid passage 16 formed between the passage member 14 and the rotating shaft 12, and the liquid passage 1B is connected to a liquid return passage 17 formed within the case 13.

Reference numeral 18 indicates a backing ring disposed at a portion of the case 13 that pivots the outer shell 11, and furthermore, 20A and 20B.
is a backing ring for keeping the liquid passages 1B and 17 liquid-tight.

Reference numeral 21 denotes a fluid supply passage bored in the case 13 so as to communicate with the center of the outer #ll.On the other hand, a fluid tank 22 is provided outside, and both ends of the fluid tank 22 are connected to the liquid return passage 17 and the supply passage. 21, respectively, so that, for example, a closed cycle is constructed between the fluid tank 22 and the flywheel outer all.

23 is an electromagnetic coil disposed around the fluid tank 22;
4 is the power supply to the electromagnetic coil 23, 25 is "r!!!, li
This is an open/close switch for exciting and demagnetizing the first coil 23, and the magnetic field generated in the tank 22 by the excitation of the electromagnetic coil 23 attracts the magnetic substance in the magnetic fluid circulating through the tank 22.

Next, the weight variable operation in the variable weight flywheel configured as described above will be described.

Note that the magnetic fluid 30 filled and used during the closed cycle has a particle size that does not easily cause sedimentation or agglomeration even when centrifugal force is applied to it, and that will oscillate under the action of a strong external magnetic field. It goes without saying that it is desirable to use magnetic particles.

Now, put such a magnetic fluid 30 outside the flywheel #l
When the outer #11 is rotated, the magnetic fluid 30 introduced into the outer #11 is biased toward the rim portion 11A by centrifugal force, and pressure is generated. The magnetic fluid 30 where pressure was generated
The fluid 30 is passed through the return pipe 15 to the liquid passage 18 and then to the liquid passage 17 and returned to the fluid tank 22, and the returned fluid 30 is again supplied to the outside of the flywheel #11 through the supply passage, thus completing the circulation. repeated.

Note that here, the hydraulic pressure of the fluid 30 biased to the rim portion 11A of the outer shell changes depending on the rotation speed of the outer shell 11;
Even if the fluid pressure changes, only the circulation speed changes, and the amount of fluid 30 that is biased does not change.

Therefore, when the electromagnetic coil 23 is energized to excite the fluid 30 being circulated in this way, a magnetic field is generated in the tank 22, and the magnetic material in the fluid 30 receives an attractive force due to this magnetic field. The magnetic material distribution within the area is uneven. In this way, the magnetic fluid, which has become a fluid with a low magnetic material density, forms the outer shell 1.
1, the flywheel's moment of inertia will decrease accordingly if the number of revolutions remains the same. Further, when trying to increase the moment of inertia, the electromagnetic coil 23 may be demagnetized.

〔effect〕

As explained above, according to the present invention, a hollow flywheel outer shell, a magnetic fluid filled in the outer shell,
The magnetic fluid is removed from an opening provided in the rim using a device that introduces the magnetic fluid and the pressure of the magnetic fluid that is fixed to the shaft support side of the rotating shaft and is biased toward the external inner rim due to centrifugal force. t! a fluid tank for receiving a ferrofluid to be circulated in series;

An electromagnetic coil capable of forming a magnetic field in the fluid tank and a means for exciting and exciting this electromagnetic coil are used in order to reduce the inertia of the flywheel. This allows the magnetic material in the magnetic fluid to stagnate in the fluid tank and reduce the specific gravity of the magnetic fluid.If you want to increase the inertial force of the flywheel, you can demagnetize the magnetic material by demagnetizing the electromagnetic coil. By dispersing it in the fluid, its specific gravity can be increased, and the inertia of the flywheel can be easily changed while it rotates once, making S* more effective as a flywheel. can.

[Brief explanation of drawings]

FIG. 11 is a schematic diagram showing an example of the configuration of the variable weight flywheel of the present invention. Figures 2 and 3 are diagrams showing an example of the configuration of a conventional variable weight flywheel. It is BWJ. ! ···Flywheel. 2A, 2B...Rotation axis. 3A, 3B... Bearings. 4... Coupling, 5... Prime mover, 6... Flywheel outer shell. 7... Fluid, 8A, 8B... Filling and draining valve. 11... Flywheel outer shell, 11A... Rim part, 12... Rotating shaft. 13... Case, 14... Return passage. 15...Return pipe, 18.17...Liquid passage. 19.2OA, 20B...Backing ring, 21
...Supply passage. 22...Fluid tank. 23... Electromagnetic coil. 24...Power supply. 25... Open/close switch, 30... Magnetic fluid.

Claims (1)

[Scope of Claims] An outer shell of a hollow flywheel fixed on a rotating shaft, a magnetic fluid filled in the outer shell, an introduction device for guiding the magnetic fluid into the outer shell, and an introduction device for guiding the magnetic fluid into the outer shell, an extrusion device fixed to the shaft support side and configured to push out the magnetic fluid from the rim portion to the outside by the pressure of the magnetic fluid generated in the rim portion within the outer shell by centrifugal force; and connected to the extrusion device and the introduction device. a fluid tank containing the magnetic fluid; an electromagnetic coil capable of generating a magnetic field in the fluid tank; and means for energizing and demagnetizing the electromagnetic coil; . A variable weight flywheel, characterized in that the magnetic material in the magnetic fluid in the fluid tank is unevenly distributed.