JPS61149645A - Variable capacity flywheel - Google Patents

Abstract

PURPOSE:To enable wasteful consumption of energy to be prevented when a rotary speed is changed, by forming the outer shell of a hollow type flywheel enabling fluid to be carried in and out and changing a quantity of the fluid in accordance with the rotary speed. CONSTITUTION:When the pressure of fluid is lower than a preset determined value Pc, tension of a spring 18F overcomes the pressure applied to the surface of a plunger 18E in a pressure receiving chamber 18G, and a flywheel, moving the plunger 18E rightward and connecting a supply port 18C with a delivery port 18A, supplies fluid into an outer shell 11. Accordingly, the flywheel, acting in a tendency increasing the pressure of fluid if a rotary speed is equal and naturally increasing also the centrifugal force, enables the wasteful consumption of energy to be prevented when the rotary speed is changed.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a variable-bore flywheel, and more specifically, the capacity of the liquid contained in the hollow flywheel is changed according to the engine speed, and the inertia of the wheel due to centrifugal force is reduced. This invention relates to a controllable variable capacity flywheel.

[Prior art]

The flywheel attached to the rotating shaft of an internal combustion engine, etc.
By utilizing the inertia, it is possible to equalize the rotational speed5 and to utilize the stored energy. Since then, flywheels with adjustable inertia have been developed.

FIGS. 6 and 7 each show an example of a conventional flywheel capable of changing the inertial force (see Japanese Patent Laid-Open No. 54-40970).

In FIG. 6, reference numeral 1 denotes a flywheel constructed by combining double-layered discs, and rotary shafts 2A and 2B provided at both ends of the flywheel are supported by bearings 3A and 3B. It is directly connected to the prime mover 5 via the motor.

Thus, in this example, the moment of inertia of the flywheel 1 can be changed by changing the combination of the plurality of discs.

In addition, the seventh ri4 injects the fluid 7 into the drum-shaped flywheel outer shell 6, and forms the fluid 7 into an annular shape as shown in the figure by centrifugal force based on the rotation of the flywheel outer shell 6.
The purpose is to obtain the effect of a flywheel by the moment of inertia mainly caused by the annular fluid 7.
In the case of this example, the provided inlet and drain valves 8A and 8B
By injecting or draining the fluid 7 through the fluid 7, the amount of the fluid 7 can be adjusted to change the moment of inertia.

However, with conventional flywheels, it is necessary to disassemble the flywheel 1 each time the moment of inertia is changed in the case of Fig. 6, and in the case of Fig. 7, it is necessary to disassemble the flywheel 1 each time. It must be drained and the amount of fluid 7 in the flywheel shell 6 cannot be changed during engine operation.

However, with general flywheels, the pulsation due to torque fluctuations becomes large, especially at low rotation speeds, so the rim, i.e. the outer periphery, is required to be heavy, and if it is too heavy, When the rotational speed is changed, energy is wasted and responsiveness is further deteriorated.

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 lighter as the engine speeds up, it is not possible to use the conventional flywheel as described above. Otherwise, such control would not be possible.

〔the purpose〕

The purpose of the present invention is to focus on such conventional problems, and in order to solve the problems, it is possible to take liquid in and out of the hollow flywheel outer shell, and to control the amount of liquid supplied to the engine. By changing it according to the rotational speed, it is possible to control the amount of fluid being biased toward the rim by centrifugal force, for example, increasing in the low rpm range, and decreasing as the rpm increases. The objective is to provide a variable capacity flywheel.

〔composition〕

In order to achieve such an object, the present invention includes a hollow flywheel outer shell fixed to a rotating shaft, a device for guiding a liquid into the outer shell, and an opening in a rim portion in the outer shell. A pitot tube is fixed to the shaft supporting side to guide the pressure of the liquid biased against the rim part by centrifugal force to the outside from the opening, and an outer shell is installed so that the pressure of the liquid is always kept constant through the pitot tube. and a device for controlling the inflow and outflow of liquid to and from the inflow and outflow of liquid.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 shows an embodiment of the present invention. Here, 11 is a hollow flywheel outer shell fixed to a rotating shaft 12. In this example, the rotating shaft 12 is pivotally supported on a case 13, and this rotation An internal combustion engine prime mover (not shown) is attached to either end of the shaft 12.

ttC is a draft internal material disposed, for example, radially from the center of the shell on the case 13 side of the flywheel outer shell 11 toward the rim portion 11A; When the fluid is supplied into the shell from the rim part, the supplied fluid quickly rotates integrally with the outer shell 11 at the same speed, and is provided when the movement of the liquid to the rim part is practically sufficient. There's no need.

Reference numeral 14 denotes a cylindrical return liquid passage member disposed concentrically with the rotating shaft 12 in the outer shell 11 and having one end fixed to the case 13, and a plurality of pitot tubes 1 are provided at the free end side of the passage member 14.
5 are connected radially, for example, and the tips of these pitot tubes 15 are opened to the rim portion 11A of the outer shell 11, so that the liquid guided from the pitot tubes is formed between the guide member 14 and the rotating shaft 12. The liquid is led to the control valve 18 through a liquid passage 18 and a liquid passage 17 formed in the case 13.

19 is a backing ring disposed on the part that pivots the outside 911 of the case 13, and 20A8 and 20B
is a backing ring for keeping the liquid passages 1B and 17 liquid-tight.

Next, the control valve 18 will be explained.

The control valve 18 is a valve that controls to maintain constant the liquid pressure applied to the tip of the pitot tube 15 of the liquid layer biased by the centrifugal force against the rotating flywheel rim portion 11A, and its discharge bow) 48A and a liquid supply passage 21 provided in the case 13 are connected by a supply pipe 22, and a pressure receiving bow
B and case! The liquid passage 17 provided in 3 is connected to the pilot pipe 2.
Connect by 3. 24 is a drain pipe branched from the pilot pipe 23 and provided with an orifice 24A in the middle.

Furthermore, the control valve 18 is provided with a bow 18G and an air supply boat 1811 for guiding liquid, for example oil, from an oil pump with a relief valve (not shown) through a conduit 2B, and the conduit 2B is further provided with an air supply boat 1811 for directing liquid, for example oil, from an oil pump with a relief valve (not shown). In a state where the liquid pressure is balanced and there is no need to supply liquid, where the restricting orifice 28A is provided, the supply boat 18C and the air supply boat 18 are balanced with the spring force of the plunger 18E or the spring 18F.
0 is kept closed.

Assuming that the rotating shaft 12 rotates in the variable capacity flywheel configured in this way, the flywheel outer shell 11
As the liquid rotates, the liquid supplied into the outer shell 11 is biased toward the rim portion 11A in the outer shell by centrifugal force, resulting in a doughnut-shaped liquid 1! 125 is formed.

The liquid layer 25 at this time has pressure due to the centrifugal force generated outside the mass itself, and as shown in FIG. 2, the larger the layer pressure (here, L
,>Lz>...>I,s), and the higher the rotational speed N is, the larger it becomes in proportion to the square of the rotational speed. Note that Pout indicates the hydraulic pressure at the tip of the pitot tube 15 = Therefore, if the liquid volume is controlled so that the hydraulic pressure Pout is kept constant, as is clear from Fig. 2, the rotation speed N
It is possible to make the rim portion 11A hold a large amount of liquid when the number of revolutions N is low, and a small amount of liquid when the number of revolutions N is high.

That is, the present invention applies this principle, and considering the rotating state, the hydraulic pressure generated by the liquid fi 25 is transferred from the pitot tube 15 through the liquid passage 18° 17 and the pilot tube 23 to the pressure receiving boat 18B. Further pressure receiving chamber 1
8G, and some of the liquid is in a state where it can be discharged to the outside from the orifice 24A. Therefore, if the hydraulic pressure at this time is lower than the preset predetermined pressure Pc, the spring force of the spring 18F overcomes the pressure applied to the surface of the plunger 18H in the pressure receiving chamber 18G, and the plunger 18E is moved to the right. Since the supply boat 18G and the discharge boat 18A are connected to supply the liquid into the outer shell 11, the liquid pressure tends to be increased if the rotation speed is the same, and naturally the centrifugal force is also increased.

Further, when the hydraulic pressure approaches the predetermined value Pc, the plunger 181
Conversely, E is moved to the left against spring 1BF, and the first
When the equilibrium state shown in the figure is returned and the pressure becomes higher than the predetermined pressure Pc, the air supply valve (180) is opened and the liquid becomes peat.
The liquid is released from the pipe 15 to the outside through the biloft pipe 23 and the drain pipe 24, and acts to reduce the liquid amount in the rim portion 11A and to reduce the liquid pressure, and the centrifugal force is reduced at the same rotation speed.

FIG. 3 shows another embodiment of the present invention.In this embodiment, instead of controlling the supply side of the liquid, the discharge side of the liquid is controlled, and the liquid is supplied to the control orifice 28A provided in the conduit 26. is automatically supplied to the flywheel outer shell 11 via.

On the other hand, the hydraulic pressure led from the pitot pipe 15 is led to the pressure receiving port 18B of the control valve 18 and to the discharge port 111K via the pilot pipe 23. Note that IIB is an air escape hole bored in the outer shell 11, and 23A is an orifice for transmitting hydraulic pressure.

In the variable capacity flywheel configured in this manner, when the liquid pressure in the liquid layer 25 of the rim portion 11A increases above the predetermined pressure Pc, the plunger 18E moves to the left, thereby releasing water into the discharge boat 18. It is possible to drain the liquid from the relief boat 180' by communicating with the boat 180', and when the liquid pressure becomes lower than the predetermined pressure Pc, the communication is closed and the supply of liquid is continued. Hydraulic pressure is increased.

FIG. 4 shows still another embodiment of the present invention. In this embodiment, both supply and discharge of liquid are performed by a control valve 18. That is, in a state where the liquid pressure is low, by communicating between the supply port (18G) and the discharge port (18A), the liquid is supplied into the outer shell 11 via the supply pipe 22, and the above liquid pressure becomes the predetermined pressure Pc. As shown in the figure, in the state where the liquid is maintained, the liquid is not supplied and discharged at the same time, and when the liquid pressure becomes higher than the predetermined pressure Pc, the plunger 18E moves further to the left from the state shown in the figure, and the liquid is discharged. The liquid is discharged through communication between the water port 18 and the relief port 180'.

FIG. 5 shows yet another embodiment of the invention.

In the examples described so far, we have assumed, for example, an oil pump, that a liquid at a nearly constant pressure is supplied from such a pump, but in this example, liquid is supplied from such a pump. Instead, a liquid tank is provided from which liquid is supplied or discharged liquid is returned to the tank.

Here, 30 is a liquid tank, and the liquid in the liquid tank 30 is directly led to the supply port isc of the control valve 18 through the supply pipe 26. Furthermore, in this example, the air vent pipe 31 from the outer shell 1.1 is led to the tank 30, and the tank 30 itself is provided with an air vent 32. Further, a return pipe 33 is provided between the pressure receiving chamber 18G of the control valve 18 and the tank 30,
An orifice 33A is provided in the middle of the return pipe 33.

In the variable capacity flywheel configured in this way, when the liquid pressure in the outer shell rim portion 11A becomes higher than the predetermined pressure Pc, the liquid is returned to the tank 30 through the pilot pipe 23 and the return pipe 33, and the liquid pressure is raised to the predetermined level. When the pressure becomes lower than Pa,
The supply port 18G and the discharge port 18 are connected,
Liquid from tank 30 to the outer shell! 1. Note that liquid layer 2
The effects related to the change in number 5 are the same as in the other examples, so their explanation will be omitted. However, in this example, when returning the liquid, potential energy is given to the liquid.
This stored energy can be used to supply liquid.

Energy can be used effectively for control.

Note that although the type of liquid supplied to the flywheel outer shell 11 has not been described in detail in the above description, water may be used in addition to engine oil, transmission oil, etc., and furthermore, water may be used. It is also possible to use fluids such as mercury.

〔effect〕

As described above, according to the present invention, there is provided a hollow flywheel outer shell fixed to a rotating shaft, an introduction device for introducing liquid to the outer shell, and an outer shell fixed to the shaft support side of the rotating shaft. A pitot tube that has an opening in the rim part of the shell and can guide the pressure of liquid biased to the rim part by centrifugal force during rotation of the outer shell from the opening to the outside of the outer shell; The controller is connected to the controller and can discharge the liquid from the outer shell or introduce it into the outer shell so that the pressure of the liquid is maintained at a predetermined pressure. As the liquid pressure increases above the predetermined pressure, the liquid is discharged to the outside of the shell through the pitot tube, reducing the amount of liquid and lowering the rotational speed.
As the fluid pressure at the rim decreases, fluid is supplied into the outer shell and the amount of fluid increases, which increases the inertia of the flywheel when the rotational speed is low, and when the rotational speed is high. It is possible to provide an efficient flywheel that does not cause the flywheel to waste energy.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing an example of the configuration of the variable displacement flywheel of the present invention, Fig. 2 is a characteristic curve diagram relating to the relationship between hydraulic pressure and rotation speed in the flywheel rim section applied to the present invention, and Fig. 3 , FIG. 4 and FIG. 5 are model diagrams showing the configuration of other embodiments of the present invention, and FIGS. 6 and 7 are model diagrams showing the configuration of a conventional variable capacity flywheel, respectively. DESCRIPTION OF SYMBOLS 1... Flywheel, 2A, 2B... Rotating shaft, 3A, 3B... Bearing, 4... Coupling, 5... Prime mover, 6... Outer shell. 7... Fluid, 8A, 8B... Filling and draining valve, 11... Flywheel outer shell, 11A... Rim portion, 11B... Relief hole, 11G... Guide member, 12... Rotating shaft, 13...Case, 14...Liquid passage member, 15...Pitot tube, 18.17...Liquid passage. 1. Control valve, 18A...Discharge port, 18B...Pressure receiving port, 18G-...Liquid supply port, 180...Air supply port. 18E...Plunger. 18F...Spring, 18G...Pressure receiving chamber, 18K...Discharge port, 19.20A, 20B...Backing ring, 21.
...Liquid supply passage, 22... Supply pipe, 23... Pilot pipe, 24... Drain pipe, 24... Todoroki, 28A, 33A... Orifice, 25... Liquid layer. 28... Conduit. 28 Todoroki...orifice, 30...liquid tank, 31...air release pipe, 32...air vent, ゛''pa 3-...return pipe, '

Claims (1)

[Scope of Claims] An outer shell of a hollow flywheel fixed to a rotating shaft, an introduction device for introducing liquid to the outer shell, and a rim inside the outer shell fixed to a shaft support side of the rotating shaft. a pitot tube having an opening in the outer shell and capable of guiding the pressure of liquid biased toward the rim part by centrifugal force during rotation of the outer shell from the opening to the outside of the outer shell; and a control device that is connected to the liquid introduction device and controls the discharge and introduction of the liquid via the pitot tube and the liquid introduction device so that the pressure of the liquid biased to the rim portion is maintained at a predetermined pressure. A variable capacity flywheel characterized by comprising: