JPS62178777A - Braking device for high speed rotary body - Google Patents

Abstract

PURPOSE:To obtain a braking device which is safe, light in weight, small in size, excellent in control capability and prevents a mechanical damage of a rotary body support portion, by applying a braking force to a high speed rotary body by utilizing fluid friction of operating fluid. CONSTITUTION:A braking device for a high speed rotary body comprises a pressurizing tank 8 for storing operating fluid to be charged into and discharged from a casing 2 and pressurizing air introduced therein from the casing 2, an oil discharge pump 12 for discharging the operating fluid into the pressurizing tank 8, a vacuum pump 14 capable of reducing pressure in the casing 2 by introducing air into the pressurizing tank 8, and an operating fluid feed line 10 for feeding the operating fluid from the pressurizing tank 8 to the casing 2 through a switch valve 13. When it is necessary that a braking force is applied to a high speed rotary body 3 under a substantially vacuum condition, the switch valve 13 is opened so that the oil discharge pump 12 is in a non-operation state. Then, the casing 2 is filled with the operating fluid to apply the braking force by fluid friction. As a result, a braking device which is safe, light in weight, small in size, excellent in control capability and capable of preventing a mechanical damage of a rotary body support member is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to high-speed rotating body devices such as flywheel devices for energy storage.

[Conventional technology]

Recently, energy conservation has become an issue due to the decrease in energy resources, and in the field of automobiles, flywheel devices are being developed to recover and store surplus energy generated during braking. By the way, when considering braking of the high-speed rotating body included in such a flywheel device, conventional braking devices include: ■ A disk plate is provided coaxially with the high-speed rotating body, and a play brake (rad) is placed opposite the disk plate. place,
A hydraulic brake is a hydraulic brake in which a hydraulic cylinder presses a brake pad against a disc plate, and uses the frictional force between these brake pads and the disc plate to brake a high-speed rotating body. ■ A high-speed rotating body, or this A high-speed rotating body is braked by pressing the outer periphery of a rotating shaft connected to the high-speed rotating body with a band) (Rad brake).

(2) There is a braking device that connects a speed reducer to a high-speed rotating body and brakes the high-speed rotating body via the reducer.

[Problem that the invention seeks to solve]

By the way, the continuous rotation of the high-speed rotating body in a flywheel device usually reaches a high speed of 10,000 r, p, m or more, and the rotational energy is temporarily stored surplus energy, and this surplus energy is Because they are extremely large, the above-mentioned hydraulic brakes and band brakes tend to become larger and cause shock during braking (which increases manufacturing costs and increases braking performance). Difficult. In particular, in the case of the above-mentioned band brake (①), if the brake lining is located around the outer circumference of the rotating body, the circumferential speed of the rotating body is high, so not only does the capacity of the lining become large, but it also has a large capacity to support the rotating body. There is a risk of the support parts of bearings and seals being destroyed by abrasion particles from the lining, etc., which poses a safety problem.Furthermore, in order to effectively decelerate the rotation of high-speed rotating bodies where energy is stored, , a costly brake system is required.

In addition, in the above-mentioned braking device (■), the rotation of the high-speed rotating body must always pass through the reduction gear, so it is impossible to brake the high-speed rotating body even if the reducer is destroyed. This may cause damage to the high-speed rotating body, but there is no guarantee of safety against such a case.

The present invention has been made in view of the above-mentioned actual situation in the prior art, and its objectives are to be lightweight and compact, to suppress shock during braking, and to prevent mechanical damage to the support portion of a high-speed rotating body. It is an object of the present invention to provide a braking device for a high-speed rotating body that can prevent damage and minimize the danger to the outside even if the high-speed rotating body is damaged.

[Means for solving problems]

In order to achieve the above object, the present invention provides a braking device for braking the rotational motion of a high-speed rotary body housed in a casing capable of forming a substantially vacuum state so as to be rotatable at high speed. As well as storing fluids;
A pressurized tank that is pressurized by introducing air inside the casing, a working fluid discharge means that discharges the working fluid inside the casing into the pressurized tank, and a working fluid discharge means that introduces the air inside the casing into the pressurized tank and pressurized the working fluid inside the casing. A pressure reducing means capable of reducing the pressure.

The structure includes a working fluid delivery line that delivers working fluid from the pressurized tank to the casing via the switching pulp.

[For production]

According to the above means, the switching pulp is opened on the platform where the high-speed rotary body needs to be braked during high-speed rotation under a substantially vacuum condition, and the working fluid discharge means is brought into a non-driving state. Then, the working fluid flows into the casing from the pressurized tank, and the inside of the casing can be filled with the working fluid. When the inside of the casing is filled with working fluid, rotational energy is converted into thermal energy due to fluid friction between the high-speed rotating body and the working fluid, and the high-speed rotating body is braked smoothly and quickly. [Example] Below 1. An example of implementation of the present invention will be explained based on the drawings.

The figure is an explanatory diagram showing an embodiment of the present invention. In the figure,
Flywheel equipment #1 as a high-speed rotating body device mainly consists of a casing 2 forming an outer shell and a high-speed rotating body 3 rotatably housed within the casing 2, and the high-speed rotating body 3 includes: High-speed rotation vacuum seal 4 and high-speed bearing 5
The rotating shaft 6 is supported through the casing 2, and the high-speed rotation vacuum seal 4 and the high-speed bearing 5 are held on the side surface of the casing 2 by a retainer 7 to prevent them from falling off.

Further, a pressurized tank 8 is provided separately from the flywheel device 1 to store a working fluid such as hydraulic oil, and the pressurized tank 8 is connected to drained oil drawn out from the lower part of the casing 2. line 9, an oil supply line 1o led out from the lower part of the pressurized tank 8 and reaching the casing 2, and the casing 2.
It is connected to an intake/exhaust line 11 led out from the upper part of.

The oil drain line 9 has a casing 2K on the suction side.
, an oil drain pump 12 as a working fluid discharge means whose discharge side is connected to the pressurized tank 8, a switching pulp 13 in the oil feed line 1o, and a switching pulp 13 in the intake/exhaust line 11 from the intake side to the casing 2. A vacuum pump 14 as a pressure reducing means whose exhaust side is connected to the pressurized tank 8 is provided respectively.

These drain oil pumps12. Switching knob 13. The vacuum pump 14 has a control line 16 connected to the controller 15.
are connected to each other, and perform predetermined operations according to commands from the controller 15. Further, the pressurized tank 8 is equipped with a safety valve 17 for keeping the pressure inside the tank below a predetermined pressure.

The operation of the flywheel device 1 and its braking device configured as described above will be described below.

During normal times, the high-speed rotating body 3 of the flywheel device 1 is
The casing 2 is operated while being supported by a high-speed bearing 5, while the air inside the casing 2 is evacuated by a vacuum pump 14. The exhausted air is introduced into the pressurized tank 8 via the intake/exhaust line 11, and pressurizes the inside of the tank. In this state, if the high-speed rotating body 3 rotates excessively or causes abnormal vibrations, making it dangerous to operate, the controller 15 receives a signal from a sensor (not shown) installed on the high-speed rotating shaft 6. However, the switching pulp 13 is opened and the drain oil pump 12 is stopped.

Then, since the inside of the casing 2 is in a substantially vacuum state and the pressurized tank 8 is pressurized, the pressurized tank 8
The working fluid in the casing 2 quickly flows into the casing 2 via the oil supply line IO and fills the casing 2.

Once the inside of the casing 2 is filled with working fluid.

The vacuum pump 14 is stopped by the action of the controller 150. The high-speed rotary body 3 is braked by fluid friction with the working fluid within the casing 2, and is rapidly decelerated.

In this embodiment, the working fluid is set to fill the casing 2, but the vacuum seal 4 for high-speed rotation is
Since this is intended to prevent air from entering from the outside, there is a risk that the working fluid may leak from inside the casing 2 to the outside. Therefore, in cases where it is better to limit the amount of one working fluid in order to prevent the strength of seals from decreasing and to prevent the leakage of working fluid, a sensor is provided in the casing 2 to detect the amount of working fluid. It is also possible to control the amount of oil. Further, by providing the sensor, it is also possible to control the amount of deceleration by adjusting the amount of working fluid in the casing 2.

After the braking is performed in step 5 above, when the braking is released and the high-speed rotating body is driven again, K closes the switching knob 13 via the controller 15 and closes the drain oil pump 12.
The working fluid in the casing 2 is returned to the pressurized tank 8 through the oil drain line 9. At this time, the vacuum pump 1
4 is reversely rotated to suck in air in the pressurized tank 8 and exhaust it into the casing 2, thereby increasing oil drainage efficiency. It goes without saying that this effect can be obtained without using the vacuum pump 14 as long as it is a means that can introduce air into the casing 2 during operation of the oil drain pump 12.

When a predetermined amount of working fluid is discharged, the vacuum pump 14 rotates forward in response to a signal from the controller 15, and the casing 2
Exhaust the air inside. Accordingly, the number of rotations of the high-speed rotating body 30 also increases, returning to the normal operating state. At this time, the vacuum pump 14 and drain oil pump 12 are in constant operation! pAIC
However, after the high-speed rotating body 3 reaches a predetermined rotation speed,
The operation of the drain oil pump 12 may be stopped; in short, the drain oil pump 12 is in a stopped state during braking, and the switching pulp 1
3 should be opened.

The working fluid to be used may be hydraulic oil, lubricating oil, etc., but if lubricating oil is used, the tank 19 can also be used as a lubricating oil tank, which reduces the size of the entire device including the lubrication system and braking system. can be achieved.

In addition, since the inside of the pressurized tank 8 is pressurized and the inside of the casing 2 is in a substantially vacuum state, oil can be fed into the casing 2 even if it is under the casing 2. The installation position can be freely set.As described above, according to the above embodiment, ■ Braking is performed using fluid friction, so there is no shock during braking, smooth deceleration is possible, and the braking device There is no risk of damage to itself. Therefore, it is possible to improve control performance and safety.■ Since there is no need to install ancillary mechanisms such as disc brakes or brake shoes as a braking device, the equipment can be made smaller. Weight reduction and manufacturing cost can be reduced 1. ■ Since no lining is used, the high-speed rotation vacuum seal 4 and high-speed bearing 5 that support the high-speed rotating body 30 and the rotating shaft 6 can be reduced.
There is no risk of damaging the supporting parts such as.

■ Furthermore, even if the support part of the high-speed rotary body 3 were to be damaged, the small pieces generated by the damage would be mixed into the working fluid in the casing 2, so the danger to the outside can be minimized. ■ By using the same lubricating oil and braking oil, the device can be simplified. ■ By applying the working fluid directly to the rotating body 3 at high speed, the device can be simplified. At the same time, the higher the rotation speed of the rotary body, the greater the braking effect, so a low-cost, high-performance braking device for a flywheel device can be provided. ■ By rotating the vacuum pump 14 in the opposite direction, the working fluid is discharged. Efficiency can be improved; (1) By using the pressurized tank 8 as the tank that stores the working fluid, the working fluid can be delivered using the pressure difference between the pressurized tank 8 and the casing 2; There are various effects such as being able to freely choose the installation position of the pressurized tank 8 and increasing the degree of freedom in design.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, which is configured to brake a high-speed rotating body using the fluid friction of the working fluid, the present invention is lightweight and compact, has excellent braking performance, and has a high-speed rotating body. Therefore, it is possible to prevent mechanical damage to the supporting portion of the rotor, and provide a highly safe braking device for a high-speed rotating body.

[Brief explanation of drawings]

The figure is a detailed diagram for explaining the present invention. 1...7 dry wheel device, 2...casing, 3...high speed rotating body, 8...pressurizing unit, 1o...・Working fluid delivery line, 12
...Drain pump (working fluid discharge means), 13.
...Switching valve, 14...Vacuum pump (
Pressure reducing means), 15...Fun) +: +-5°, -
\. l'z, r, 'y1 ]b F roller

Claims (1)

[Claims] In a braking device that brakes the rotational motion of a high-speed rotary body housed in a casing capable of forming a near-vacuum state and capable of high-speed rotation, a pressurization system that introduces air into the casing to pressurize it and store working fluid. A tank, a working fluid delivery line that sends working fluid from the pressurized tank into the casing via a switching valve, a working fluid discharge means that can discharge the working fluid in the casing to the pressurized tank, and air in the casing. A braking device for a high-speed rotating body, characterized in that it is equipped with a pressure reducing means capable of exhausting the air to the pressurized tank side.