JP6876974B2 - Vortic ring generator - Google Patents

Description

The present invention relates to a vortex ring generator that generates a vortex ring.

Conventionally, this type of vortex ring generator generates a vortex ring by ejecting a constant amount of fluid from a discharge port in a short time (see, for example, Patent Document 1).

4 and 5 show the conventional vortex ring generator described in the publication. As shown in FIGS. 4 and 5, it is composed of a piston 90, a discharge port 91, and a cylinder 92.

Japanese Unexamined Patent Publication No. 7-332750

However, the conventional configuration has a problem that the forward-rotating vortex flow and the reverse-rotating vortex flow interfere with each other as the piston moves, and the vortex flow rotating in the forward direction at the discharge port is weakened when the vortex ring is generated. ..

Specifically, as shown in FIG. 5, when the piston 90 moves away from the discharge port 91, a gas that is a source of vortex ring formation flows into the cylinder 92 from the discharge port 91. In this case, a vortex flow 94B that rotates in the direction opposite to the rotation direction of the vortex flow 94A that is formed when the vortex ring 96 is formed is generated in the cylinder 92 near the discharge port 91. If the gas is pushed out by the piston 90 as shown in FIG. 4 before the reverse rotation vortex flow 94B disappears, the reverse rotation vortex flow 94B and the forward rotation vortex flow 94A interfere with each other and the airflow is disturbed. , It becomes difficult to generate a vortex ring 96 that can reach a long distance.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide a vortex ring generator that suppresses turbulence of an air flow that weakens a vortex flow that rotates in the positive direction when a vortex ring is generated at a discharge port.

In order to solve the above-mentioned conventional problems, the vortex ring generator of the present invention is a vortex ring generator that generates a vortex ring by discharging gas from a discharge port, and a nozzle having the discharge port is formed at the tip thereof. A front portion, a suction port for sucking gas from the outside are formed, a back portion facing the front portion, a cylinder portion formed between the front portion and the back portion, and an inner surface of the cylinder portion. e Bei and a piston sliding in the axial direction of the cylindrical portion, part the nozzle, the cross-sectional area of the cross section perpendicular to the axial direction on the rear end side of the nozzle is gradually reduced toward the tip end of the nozzle have, and has the axial direction is constant cross-sectional area of a cross section perpendicular portion on the tip side of the nozzle, the area of pre-Symbol discharge port, the cross section perpendicular to the axial direction before Symbol piston smaller than the cross-sectional area, the piston includes a through hole that penetrations of the piston in the axial direction, before Symbol piston closes the through hole when moving in a direction toward said discharge port, said piston said A first valve that opens the through port when moving away from the discharge port is provided, and the back surface thereof opens the suction port when the piston moves toward the discharge port. It is assumed that a second valve for closing the suction port is provided when the piston moves in a direction away from the discharge port.

As a result, when the piston moves away from the discharge port, the through port opens, so that gas does not flow into the discharge port from the outside, and a reverse rotation vortex flow does not occur.

The vortex ring generator of the present invention can suppress the turbulence of the airflow in the cylinder, which suppresses the turbulence of the airflow that weakens the vortex flow rotating in the positive direction when the vortex ring is generated at the discharge port.

The figure explaining the gas flow when the piston moves in the direction away from the discharge port in the vortex ring generator which concerns on Embodiment 1 of this invention. The figure explaining the gas flow at the time of moving a piston in a direction with a discharge port in the vortex ring generator which concerns on Embodiment 1 of this invention. The figure explaining the state when the vortex ring is generated in the vortex ring generator which concerns on Embodiment 1 of this invention. The figure explaining the state of the vortex flow when the piston moves in a certain direction of a discharge port of the conventional vortex ring generator. The figure explaining the state of the vortex flow when the piston moves in the direction away from the discharge port of the conventional vortex ring generator.

The first invention is a vortex ring generator that generates a vortex ring by discharging a gas from a discharge port, wherein a cylinder portion having a suction port for sucking the gas and the discharge port and an inner surface of the cylinder portion are formed. A piston that slides in the axial direction of the tubular portion is provided, and the area of the discharge port is smaller than the area of the cross section of the piston that is perpendicular to the axial direction. The through hole is formed, and the piston closes the through port when the piston moves in the direction of the discharge port, and the piston closes the through port when the piston moves in the direction away from the discharge port. By having the first valve that opens the port, the through port opens when the piston moves away from the discharge port, and it is possible to prevent gas from flowing into the discharge port from the outside. As a result, the generation of the vortex flow of the reverse rotation is suppressed, and the vortex flow in the generated vortex ring can be prevented from being weakened by preventing the vortex flow of the forward rotation from being weakened. Further, since it is not necessary to wait for the turbulence of the air flow in the cylinder to be settled, the frequency of forming the vortex ring can be increased and the amount of air transported can be increased.

A second invention particularly relates to a case where the suction port is opened when the piston moves in the direction of the discharge port and the piston moves in a direction away from the discharge port in the vortex ring generator of the first invention. By further providing a second valve that closes the suction port, it is possible to prevent the forward rotation vortex flow from being weakened even when the reciprocating sliding speed of the piston is reduced in order to reduce the amount of gas transported. .. Specifically, even if the inertial force of the gas that opens the first valve weakens when the piston separates from the discharge port, the gas in the back space is sealed by the second valve by providing the second valve. Even if the piston moves away from the discharge port, the gas in the back space does not move out of the cylinder and surely moves to the front space through the through port, so the gas in the front space The pressure does not decrease, and the inflow of external gas from the discharge port can be prevented. Therefore, it is possible to prevent the vortex flow in the forward rotation from being weakened and to prevent the vortex flow in the generated vortex ring from being weakened.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the present embodiment.

(Embodiment 1)

Hereinafter, the configuration of the vortex ring generator 1 according to the present embodiment will be described with reference to FIGS. 1 to 3.

[Configuration of vortex ring generator]
The vortex ring generator 1 shown in FIG. 1 has a front surface portion 30 in which a discharge port 12 for discharging a vortex ring is formed, a back surface portion 32 in which a suction port 14 for sucking gas in an external space is formed, and a front surface portion 30 and a back surface. It has a tubular portion 10 sandwiched between the portions 32 and the cylinder portion 10. The piston 20 described above slides on the inner surface of the tubular portion 10 in the axial direction of the tubular portion 10.

Here, the opening area of the discharge port 12 formed in the front surface portion 30 is smaller than the cross-sectional area of the piston 20 perpendicular to the axial direction of the tubular portion 10. The shape of the discharge port 12 is circular, but it may be another shape such as an ellipse, and is not necessarily limited to a circular shape.

A nozzle 31 is formed on the front surface portion 30, and the tip of the nozzle 31 is a discharge port 12. The cross-sectional area of the cross section perpendicular to the central axis of the internal space of the nozzle 31 gradually decreases toward the discharge port 12, and finally becomes constant.

In the present embodiment, the nozzle 31 is formed as the discharge port 12 on the front surface portion 30, but the present invention is not limited to this. For example, the discharge port 12 may be a hole provided in the front surface portion, and the shape of the hole may be circular, elliptical, or the like.

Further, the inner diameter of the tubular portion 10 and the outer diameter of the piston 20 are substantially the same. Further, the piston 20 may be provided with a piston ring at a portion in contact with the tubular portion 10.

In the present embodiment, the space between the piston 20 and the front surface 30 in the cylinder 10 is referred to as "front space 42", and the space between the piston 20 and the back surface 32 in the cylinder 10 is called "front space 42". Will be referred to as "backside space 40".

The piston 20 is formed with a through-hole 22 that penetrates the piston 20 in the axial direction of the tubular portion 10. That is, the through hole 22 is a passage connecting the front side space 42 and the back side space 40. In the present embodiment, a plurality of circular through holes 22 are formed concentrically at equal intervals, but the present invention is not limited to this.

The number of through holes 22 may be one. Further, the position of the through port 22 is not limited to the position shown in the figure. Further, the shape of the through hole 22 may be a shape other than a circle such as an ellipse or a rectangle.

The piston 20 closes the through port 22 when the piston 20 slides in the direction of the discharge port 12, and opens the through port 22 when the piston 20 slides in the direction away from the discharge port 12. Be prepared.

That is, the first valve 26 is a check valve that moves the gas in the back space 40 to the front space 42 through the through port 22 while preventing the gas in the front space 42 from moving to the back space 40. Is.

Further, a suction port 14 for sucking gas in the external space is formed on the back surface portion 32. The suction port 14 is a passage connecting the external space and the back side space 40.

In the present embodiment, one rectangular suction port 14 is formed on the upper portion of the back surface portion 32. The number of suction ports 14 may be plural. Further, the position of the suction port 14 is not limited to the position shown in the figure. Further, the shape of the suction port 14 may be a circular shape or an elliptical shape other than the rectangular shape.

The back surface portion 32 includes a second valve 16 that opens the suction port 14 when the piston 20 moves in the direction of the discharge port 12, and closes the suction port 14 when the piston 20 moves away from the discharge port 12.

That is, the second valve 16 is a check valve that moves the gas in the external space to the rear space 40 through the suction port 14 and prevents the gas in the rear space 40 from moving to the external space.

Further, as an operation method for sliding the piston 20 of the vortex ring generator 1, for example, a crank mechanism (not shown) using a motor (not shown) as a drive source is used to move the piston 20 in the axial direction of the cylinder portion 10. There is a method of linear motion along the line, but the method is not limited to this.

For example, when the crank mechanism using the above-mentioned motor as a drive source is used, when the rotation speed of the motor is increased, the reciprocating sliding speed of the piston 20 is increased, so that the frequency of occurrence of vortex rings can be increased. On the contrary, when the rotation speed of the motor is slowed down, the reciprocating sliding speed of the piston 20 is slowed down, so that the frequency of occurrence of vortex rings can be reduced. That is, the amount of gas transported by the vortex ring can be adjusted by the reciprocating sliding speed of the piston 20.

That is, if the reciprocating sliding speed of the piston 20 is increased, the amount of gas conveyed can be increased, and if the reciprocating sliding speed of the piston 20 is decreased, the amount of gas conveyed can be decreased.

[motion]
The operation and operation of the vortex ring generator configured as described above will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a diagram illustrating a state of vortex flow when the piston 20 moves away from the discharge port 12 in the vortex ring generator 1 according to the present embodiment.

As shown in FIG. 1, when the shaft 54 moves the piston 20 away from the discharge port 12, the internal pressure of the back surface side space 40 becomes larger than the atmospheric pressure of the external space.

Therefore, the second valve 16 provided in the suction port 14 of the back surface portion 32 is closed, the first valve 26 provided in the through port 22 of the piston 20 is opened, and the gas in the back side space 40 is released into the front side space 42. Leaked into.

As a result, since the inflow of gas into the front side space 42 is mainly from the back side space 40, it is possible to prevent the gas from flowing into the front side space 42 from the external space through the discharge port 12. it can.

As a result, the generation of the reverse rotation vortex 94B as shown in FIG. 5 is suppressed in the vicinity of the discharge port 12 in the nozzle 31.

FIG. 2 is a diagram illustrating a state of vortex flow when the piston 20 moves in a certain direction of the discharge port 12 in the vortex ring generator 1 according to the present embodiment.

After the movement of the piston 20 in the direction away from the discharge port 12 is completed, as shown in FIG. 2, when the shaft 54 moves the piston 20 in the direction closer to the discharge port 12, the internal pressure of the back side space 40 is increased. It becomes smaller than the atmospheric pressure in the external space.

As a result, the first valve 26 is closed and the second valve 16 is opened. Further, the gas in the front space 42 is pushed out toward the discharge port 12.

At this time, a forward-rotating vortex 100 similar to the vortex 94A shown in FIG. 4 is generated in the vicinity of the discharge port 12 in the nozzle 31. Further, the gas in the external space flows into the back side space 40 from the suction port 14 in which the second valve 16 is opened.

FIG. 3 is a diagram for explaining the state of the vortex flow when the vortex ring 102 is generated in the vortex ring generator 1 according to the present embodiment.

When the piston 20 moves to the discharge port 12 and the shaft 54 further moves the piston 20 in the direction closer to the discharge port 12, a forward-rotating vortex 100 is generated.

At this time, since the reverse rotation vortex flow does not exist in the vicinity of the discharge port 12 in the nozzle 31 due to the action of the first valve 26, the forward rotation vortex flow 100 is the vortex flow 94A of the conventional vortex ring generator shown in FIG. It will be stronger. As a result, it is possible to generate a vortex ring 102 that does not easily collapse and can reach a long distance.

In this way, the vortex ring generator 1 repeatedly generates the vortex ring 102 by repeating the operations of FIGS. 1 to 3.

Further, since it is not necessary to wait for the reverse rotation vortex flow to disappear, it is possible to generate a vortex ring that is hard to collapse and can reach a long distance with high frequency.

As described above, in the present embodiment, the piston 20 is formed with a through port 22 that penetrates the piston 20 in the axial direction, and the piston 20 is used when the piston 20 moves in the direction of the discharge port 12. When the piston 20 moves away from the discharge port 12 by closing the through port 22 and having the first valve 26 which opens the through port 22 when the piston 20 moves away from the discharge port 12. By opening the through port 22, gas does not flow into the discharge port 12 from the outside, a reverse rotation vortex flow is not generated, and the forward rotation vortex flow is prevented from weakening, so that the vortex flow in the generated vortex ring is weakened. Can be prevented. Further, since it is not necessary to wait for the turbulence of the air flow in the cylinder to be settled, the frequency of forming the vortex ring can be increased and the amount of air transported can be increased.

Further, in the present embodiment, the suction port 14 is opened especially when the piston 20 moves in the direction of the discharge port 12, and the suction port 14 is closed when the piston 20 moves in the direction away from the discharge port 12. By further providing the valve 16, it is possible to prevent the forward rotation vortex flow from being weakened even when the reciprocating sliding speed of the piston 20 is reduced in order to reduce the amount of gas transported. Specifically, even if the inertial force of the gas that opens the first valve 26 weakens when the piston 20 separates from the discharge port 12, the gas in the back side space 40 becomes the second valve by providing the second valve 16. Since it is sealed by 16, even if the piston 20 moves away from the discharge port 12, the gas in the back side space 40 does not move out of the cylinder portion 10, and the gas in the front side space 42 does not move through the through port 22. Since it moves reliably, the gas pressure in the front space 42 does not decrease, and the inflow of external gas from the discharge port 12 can be prevented. Therefore, it is possible to prevent the vortex flow in the forward rotation from being weakened and to prevent the vortex flow in the generated vortex ring from being weakened.

Each of the above embodiments is merely an example of embodiment in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. That is, the present invention can be implemented in various forms without departing from its gist or its main features.

The vortex ring generator of the present invention suppresses the turbulence of the air flow in the cylinder and can generate a vortex ring that does not easily collapse and can reach a long distance. Applicable.

1 Vortic ring generator 10 Cylinder 12 Discharge port 14 Suction port 16 2nd valve 20 Piston 22 Through port 26 1st valve 30 Front part 31 Nozzle 32 Back part 40 Back side space 42 Front side space 100 Vortic flow 102 Vortic ring

Claims (1)

A vortex ring generator that generates a vortex ring by discharging gas from a discharge port .
A front portion in which a nozzle having the discharge port is formed at the tip, and
A suction port for sucking gas from the outside is formed, and the back portion facing the front portion and the back portion
A tubular portion formed between the front surface portion and the back surface portion,
E Bei and a piston sliding in the axial direction of the cylindrical portion of the inner surface of the tubular portion,
The nozzle has a portion on the rear end side of the nozzle whose cross-sectional area perpendicular to the axial direction gradually decreases toward the tip end side of the nozzle, and is perpendicular to the tip end side of the nozzle in the axial direction. It has a portion where the cross-sectional area of the cross section is constant,
Area before Symbol discharge port is smaller than the cross-sectional area of the cross section perpendicular to the axial direction before Symbol piston,
Said piston includes a through hole that penetrations of the piston in the axial direction, if the previous SL piston moves toward the said discharge opening to close the through hole, in a direction in which the piston moves away from said discharge port A first valve that opens the through-hole when moving is provided.
The back surface is provided with a second valve that opens the suction port when the piston moves toward the discharge port and closes the suction port when the piston moves away from the discharge port. Has been
Vortic ring generator.

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