JPS6199737A - Fly-wheel device - Google Patents

Abstract

PURPOSE:To safely establish damping for a fly-wheel by radiating the rotation energy of the fly-wheel as the thermal energy by use of the lubricant introduced to a vacuum container as damping oil. CONSTITUTION:When a fly-wheel 2 makes excessive rotation, an electromagnetic switching valve 26 is switched to an opening condition. Thereby, the lubricant in a tank 10 is transmitted rapidly to a vacuum container 1 to charge it. The lubricant serving as damping oil reduces the speed of the fly-wheel 2 depending on the viscosity friction between the lubricant and fly-wheel 2. At this time, if the lubricant staying in the vacuum container 1 is returned to the tank 10, radiation of the thermal energy is promoted depending on the viscosity friction and damping for the fly-wheel can be perfectly established.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an improvement of a braking mechanism in a flywheel device suitable for storing energy.

[Background of the invention]

In recent years, energy saving has become a problem due to the decrease in energy resources, and a 7-lifewheel device has been developed to recover and store surplus energy generated during braking in automobiles and the like. In such a flywheel device, a flywheel with a small diameter is used for downsizing, so the 7-flywheel necessarily rotates at high speed.

Therefore, there is a risk of the flywheel being destroyed due to excessive rotation and abnormal vibration, and a braking mechanism is provided to deal with this.

FIG. 2k shows an example of a conventional flywheel device with a braking mechanism. Seven dry wheels 2 are housed in a vacuum container 1,
The high speed rotating shaft 3 is supported by a high speed bearing 4. High-speed rotation axis 3! ? :P Touching vacuum seal 5 maintains the integrity inside vacuum container 1. The high speed bearing 4 and the vacuum seal 5 are attached to the vacuum container l by a catch 6. A lubricating oil nozzle 7 is arranged with respect to the high-speed bearing 4, and the lubricating oil is sent by a lubricating oil supply bo/g 8? 11fff
The oil is sprayed from the oil nozzle 7. After lubricating the high-speed bearing 4, the lubricating oil is sent out together with air by a jet pump 9 connected to the bottom of the vacuum container 1, and the lubricating oil is pumped out 10.
will be returned to. In the lubricating oil tank 10 , lubricating oil and air are separated, and the lubricating oil is sent to the lubricating oil nozzle 7 by the lubricating oil supply pump 8 and also to the nozzle of the jet pump 9 . The air separated within the lubricating oil tank IO is discharged from the breather 11 to the atmosphere. The jet pump 9 is used as both a vacuum pump and a drain pump.

The braking mechanism 12 includes a disc 13 that is integrally attached to the high-speed rotating shaft 3, a brake case 15 to which pressure oil is supplied from a hydraulic source 14 during braking, a piston 17 having a placket F16 at its tip, and a return spring 18. It consists of

During braking, pressure oil flows from the hydraulic source 14 to the brake case 15.
K is supplied to K, which causes the piston 17 to release the return spring 18.
The brake pad 16 is pressed against the disc 13. Braking is performed by the frictional force generated between the brake pad 16 and the disk 13.

In the flywheel device shown in Fig. 2, the rotational speed of the flywheel 20 is usually high speed of 10,000 rpm or more, and the rotational energy is temporarily stored surplus energy, which is quite large. wheel 2
In order to brake effectively, the braking force becomes large.

Furthermore, as shown in FIG. 3, there is a conventional flywheel system in which a brake 1112 is provided on the low-speed rotating shaft 20 of the transmission 19 connected to the flywheel system. However, the 20 revolutions of the flywheel are not transmitted to the braking mechanism 12 unless it passes through the shift deflection 19, so if the transmission 19 is damaged, braking becomes impossible.

Braking becomes less reliable and the flywheel 2 cannot be prevented from running out of control or being destroyed. In FIG. 3, 21 is a planet gear, 22 is a ring gear, 23 is a sun gear, 24 is a bearing, and 25 is a vacuum seal, and the hydraulic circuit for lubricating oil is omitted.

In addition, there is a braking mechanism in which a brake band is tightened directly around the rotating shaft or the outer circumference of the flywheel.0 If the brake lining is located on the outer circumference of the flywheel, the capacity of the brake lining is limited due to the high circumferential speed of the flywheel. Not only will it get bigger, but there is a risk that the bearings and seals will be destroyed by the wear powder from the brake lining.

[Purpose of the invention]

The purpose of the present invention is to solve the above-mentioned problems and to solve the problems mentioned above. To provide a flywheel device capable of performing reliable and safe braking of a flywheel.

[Percentage of invention]

To achieve the above object, the present invention allows lubricating oil to flow into a vacuum container from a lubricating oil tank during braking.

It is characterized by providing means for supplying braking oil to fill the lubricating oil, so that the rotational energy of the flywheel is dissipated as thermal energy due to viscous friction between the flywheel and the lubricating oil, using the pumped lubricating oil as the braking oil. do.

[Embodiments of the invention]

FIG. 1 shows an embodiment of the invention. Components similar to those in FIG. 2 are designated by the same reference numerals.

The lubricating oil tank 10 is placed at a higher position KW& than the vacuum container 1. The lubricating oil tank 10 and the vacuum container l are connected via a ta on/off valve 26. The controller 27 controls the m confirmation/closing valve 26 based on a signal from the sensor 28 that detects the rotation of the high-speed rotating shaft 30.

Note that the lubricating oil supply pump 8 rotates at high speed l! 1113 via a speed reducer or a separate motor.

The jet pump 9 consists of a nozzle 9a and a diffuser 9b.
I VC is connected, and the diffuser 9b is connected to the lubricating oil tank 1.
0Kflj will be continued.

The high speed bearing 4 is placed inside the vacuum seal 5.

Lubricating oil is supplied through the oil filler port 29. A in FIG. 1 indicates the connection point of the oil filler port 29 on the right side of the figure to the oil pipe line.

When the rotational speed of the flywheel 20 is in the normal state, the controller 27 controls the t-release valve 26 to be in the closed state, so that the lubricating oil in the lubricating oil tank 1o is used only as lubricating oil. That is, the high-speed bearing 4VC is supplied by the lubricating oil supply pump 8, discharged from the vacuum container 1 by the jet pump 9, and returned to the lubricating oil tank 10. At the same time, the vacuum container 1 is evacuated by the jet pump 9, and the inside thereof is made into a high vacuum state.

When the flywheel 2 rotates excessively or when a large vibration occurs and becomes a dangerous nail, the controller 27 determines the necessity of braking based on the signal from the senna 28 and activates the electromagnetic on-off valve 26. Switch to open state. As a result, the lubricating oil in the Gm oil tank 10 rapidly fills the vacuum container 1k due to the pressure difference and displacement energy. The filled 11il oil acts as a braking oil on the flywheel 2 and decelerates the flywheel 2 due to the viscosity j[K between the flywheel 2 and the lubricating oil.

At this time, the jet pump 9 returns the lubricating oil in the vacuum container 1 to the lubricating oil tank 10, thereby promoting the dissipation of thermal energy due to viscous friction.

When the brake is released, the controller 27 operates the electromagnetic on-off valve 26.
return to the closed state. Accordingly, the flow of lubricating oil into the vacuum container 1 is stopped. The lubricating oil filled with the jet pump 9 is discharged.

According to this embodiment, since the lubricating oil is shared as the braking oil and only the electromagnetic on-off valve 26 is added, the size can be reduced. Since the flywheel 2 is braked directly using fluid, the braking is reliable and safe. It also allows for smooth deceleration. The higher the rotation speed of the flywheel 2, the greater the braking effect, and the energy storage flywheel device K is very effective.

[Correspondence between invention and embodiments]

The electromagnetic on-off valve 26 in the illustrated embodiment corresponds to the brake oil supply means of the present invention.

[Modified example]

A manual on-off valve may be used instead of the electromagnetic on-off valve 26. Also, K instead of the electromagnetic on-off valve 26.

It is also possible to use a variable displacement hydraulic pump or a fixed displacement hydraulic pump that can be simply switched between stopping and starting.

If the exhaust capacity is insufficient with only the jet pump 9,
A rotary vacuum pump can be attached. In that case, the suction port of the vacuum pump is connected to the upper part of the vacuum container 1.

In addition, although the drive is performed by the high-speed rotation shaft 3 via a speed reducer, the cylinder 9 container 1 driven by a separately installed motor also includes one that also has a speed reducer 19 inside as shown in Figure P43. .

[Effects of the Invention] As explained above, according to the present invention, a brake oil supply means is provided which causes lubricant oil to flow into and fill the vacuum container from a lubricant oil tank during braking, and thereby the lubricant oil is supplied to the vacuum container during braking. It is used as oil to dissipate the rotational energy of the flywheel as heat energy due to the viscous friction between the 7ly wheel and the lubricating oil, so it can be made smaller and provides reliable and comprehensive braking of the flywheel. be able to.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing an example of a conventional flywheel device, and FIG. 3 is a block diagram showing another example of a conventional flywheel device. . 1... Vacuum container, 2... Flywheel, 4... High speed bearing, 8... Lubricating oil supply bonder, 9... Jet Pump, 10...
... Lubricating oil tank, 26 ... Solenoid on-off valve, 2
7... Controller, 28... Senna. Agent: Kenji Take, Patent Attorney Department (1 person) 1st
Figure 2

Claims (1)

[Claims] 1. A vacuum vessel, a flywheel housed in the vacuum vessel, a lubricant tank for storing lubricating oil, a lubricating oil supply pump that supplies lubricating oil from the lubricating oil tank to the bearings of the flywheel, and a In a flywheel device equipped with a jet pump that discharges lubricating oil along with air and returns it to a lubricating oil tank, a braking oil supply means is provided for flowing lubricating oil from the lubricating oil tank into a vacuum container and filling it during braking. A flywheel device characterized by: