Gas-liquid drive device

Abstract

To provide a gas-liquid drive device capable of compressing gas and liquid at the same time, and carrying them.SOLUTION: The gas-liquid drive device includes a housing the inner peripheral face of which has a pre-trochoid curve, a rotor having three peaks and three sides connecting the peaks one another, and adapted to be rotated with the three peaks contacting the inner peripheral face of the housing, a shaft for transmitting rotation driving force to the rotor via a gear, including a rotary shaft at a position different from the position of the rotary shaft of the rotor, and a suction hole and a discharge hole provided in the housing, whereby gas or liquid is sucked from the suction hole into a space formed between each of the three sides provided on the rotor and the inner peripheral face of the housing, the gas or the liquid reserved in the space in accordance with the rotation of the rotor is discharged from the discharge hole, and, at the same time, the gas and liquid are compressed and carried.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a gas-liquid driving device that uses the principle of a rotary engine to drive gas and liquid simultaneously. [Background technology]

[0002] Today, pumps are widely used as a means of transporting liquids or gases from low to high places, from low pressure to high pressure, or over long distances, and various types of pumps, such as turbo pumps and piston pumps, are in practical use. However, conventional pumps have problems such as noise and vibration.

[0003] Therefore, in order to reduce noise, a rotary pump has been proposed, as disclosed in Patent Document 1. This pump has a rotor housed in a casing, with multiple liquid passages provided in the rotor, and sends liquid from a suction port to a discharge port through these passages.

[0004] A rotating body equipped with flexible blades is provided inside the rotor, and the blades engage with multiple engagement grooves provided in the rotor, rotating the rotating body as the rotor rotates. The rotation axis of this rotating body is also positioned eccentrically with respect to the rotation axis of the rotor, so that as the rotor rotates downward from its uppermost position, the volume gradually increases, sucking in liquid from the suction port through a passage, and as the rotor rotates upward from its lowermost position, the volume decreases, sending liquid through the passage to the discharge port. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 8-277786 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the volume of the above-mentioned conventional rotary pumps is small, and the amount of liquid that can be pumped with one rotation of the rotor is also limited. Furthermore, the above-mentioned liquid driving device is a device that pressurizes and transports liquid such as water, and no gas-liquid driving device that pressurizes and transports gas simultaneously with liquid has been proposed.

[0007] Therefore, the present invention provides a gas-liquid drive device that simultaneously pressurizes and conveys a liquid and a gas, and is particularly effective in a nanobubble generator that generates fine gas in a liquid, for example, fine bubbles at the nano level, if the liquid and the gas contained in the liquid can be simultaneously pressurized and supplied, and the present invention provides a gas-liquid drive device that is suitable for such applications. [Means for solving the problem]

[0008] According to the present invention, the above object can be achieved by providing a gas-liquid drive device comprising: a housing whose inner circumferential surface is formed as a peritrochoid curve; a rotor having three vertices and three sides connecting the vertices, and rotating with the three vertices in contact with the inner circumferential surface of the housing; a shaft that transmits a rotational driving force to the rotor via gears and has a rotation axis located at a position different from that of the rotor; and a suction hole and a discharge hole provided in the housing, wherein gas or liquid is sucked through the suction hole into a space formed between each of the three sides provided on the rotor and the inner circumferential surface of the housing, and the gas or liquid sucked into the space is discharged from the discharge hole as the rotor rotates, and a fixed amount of gas or liquid is fed from the suction hole to the discharge hole.

[0009] The suction holes and exhaust holes provided in the housing are characterized by comprising a pair of air intake holes and exhaust holes for sucking in and discharging gas, and a pair of water intake holes and drainage holes for sucking in and discharging liquid. The air-liquid drive device is characterized in that a plurality of units are connected in series or in parallel. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating the configuration of a pump according to the present embodiment, and is a diagram illustrating the cross-sectional structure of a pneumatic-liquid drive unit. FIG. [Figure 2] 10A and 10B are diagrams for explaining the driving operation of the gas-liquid drive unit of the present embodiment, and are diagrams showing the change in capacity of each space according to the rotation angle of the rotor. [Figure 3] 10A and 10B are diagrams for explaining the driving operation of the pneumatic liquid drive unit of the present embodiment, and are diagrams showing pressure changes in each space according to the rotation angle of the rotor. [Figure 4] FIG. 10 is a diagram showing the state inside the air-liquid drive unit when the rotor has rotated a predetermined angle. [Figure 5] 10 is a diagram showing the state inside the air-liquid drive unit when the rotor has further rotated a predetermined angle. FIG. [Figure 6] 10 is a diagram showing the state inside the air-liquid drive unit when the rotor has further rotated a predetermined angle. FIG. [Figure 7] FIG. 10 is a diagram showing a state when the pneumatic / liquid drive unit has further rotated by a predetermined angle. [Figure 8] FIG. 1 is a diagram showing a state in which a plurality of pneumatic / liquid drive units of the present embodiment are connected in series. [Figure 9] FIG. 1 is a diagram showing a state in which a plurality of pneumatic / liquid driving devices of the present embodiment are connected in parallel. [Figure 10] FIG. 10 is a diagram illustrating a state in which a plurality of pneumatic / liquid drive units of the present embodiment are connected in parallel when actually used. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram for explaining the configuration of a rotary type pneumatic liquid drive unit of this embodiment, and shows the cross-sectional structure of a pneumatic liquid drive unit 1 of this example. In the figure, the pneumatic-liquid drive unit 1 of this example is composed of a housing 2 whose inner circumferential surface has a peritrochoid curve, and a rotor 3 rotatably provided within this housing 2. The rotor 3 is rotated by the driving force of a motor (not shown), and the three vertices of the rotor 3 rotate along the inner circumferential surface of the housing 2 as a shaft 4 rotates in the direction of the arrow (counterclockwise).

[0012] The rotor 3 is provided with an internally toothed rotor gear 3d, and the shaft 4 is provided with an externally toothed shaft gear 4a, with the gear ratio between the rotor gear 3d and the shaft gear 4a set to 3:2. Therefore, as the shaft 4 rotates, the rotor 3 rotates on its axis and revolves, with the three vertices of the rotor 3 abutting against the inner peripheral surface of the housing 2, and rotating along the inner peripheral surface of the housing 2, which has a pretrochoid curve.

[0013] Intake holes and exhaust holes of a predetermined size are provided in the housing 2 that houses the rotor 3. In this example, a pair of intake hole 5a and exhaust hole 5b for sucking in and expelling gas, and a pair of water intake hole 6a and drain hole 6b for sucking in and expelling liquid (for example, water) are provided, and as will be described later, the intake hole 5a and exhaust hole 5b are used as a pair, and the water intake hole 6a and drain hole 6b are used as a pair.

[0014] Furthermore, the inner surfaces of the cylindrical air intake hole 5a, exhaust hole 5b, and water intake hole 6a, and drain hole 6b are dimpled (not shown). By dimpledly processing the inner surfaces of the air intake hole 5a, exhaust hole 5b, and water intake hole 6a, and drain hole 6b in this way, resistance to the flow of gas and water is reduced, enabling smooth intake and exhaust, and water supply and drainage.

[0015] Next, the driving operation of the pump 1 having the above configuration will be described. 2 is a diagram for explaining the driving operation of the gas-liquid drive unit 1 of this example, and is a diagram for explaining the driving operation of the gas-liquid drive unit 1 according to the rotation angle of the rotor 3. The horizontal axis shown in the figure indicates the rotation angle of the shaft 4 that transmits the driving force to the rotor 3, and three drive charts A to C shown in the figure indicate the change in capacity of spaces A to C formed between three sides 3a, 3b, and 3c of the rotor 3 and the inner circumferential surface of the housing 2.

[0016] For example, time chart A shows the change in volume of space A formed between side 3a of rotor 3 and the inner surface of housing 2, time chart B shows the change in volume of space B formed between side 3b of rotor 3 and the inner surface of housing 2, and time chart C shows the change in volume of space C formed between side 3c of rotor 3 and the inner surface of housing 2. In the figure, the hatched portions indicate periods during which the capacitance of each of the spaces A to C decreases, and the white portions indicate periods during which the capacitance of each of the spaces A to C increases.

[0017] 3 is a diagram showing the timing of intake and exhaust within the pneumatic-liquid drive unit 1, and similarly to Fig. 2 above, the horizontal axis represents the rotation angle of the shaft 4 that transmits the driving force to the rotor 3, and the three charts A to C shown in the figure represent pressure changes in the spaces A to C formed between the three sides 3a, 3b, and 3c of the rotor 3 and the inner circumferential surface of the housing 2. Specifically, the hatched portions in the figure represent periods when positive pressure is applied to each of the spaces A to C, and the white portions represent periods when negative pressure is applied to each of the spaces A to C.

[0018] The operation of the pneumatic-liquid drive unit 1 of this example will be described below, with the initial position shown in both figures being the starting position (angle 0°) of the shaft 4. This position is, for example, the position of the rotor 3 shown in FIG. 1, just before air starts to be drawn into the space A between the side 3a of the rotor 3 and the inner surface of the housing 2 through the intake hole 5a. Therefore, when rotor 3 subsequently rotates in the direction of the arrow following the rotation of shaft 4, space A formed between side 3a and the inner peripheral surface of housing 2 becomes negative pressure as shown in Figure 3, the desired gas is drawn in through intake hole 5a, and when rotor 3 rotates to the position shown in Figure 4, the volume of space A reaches its maximum. Therefore, during this time, air is drawn in through intake hole 5a, and space A is filled with the desired gas.

[0019] On the other hand, with regard to the transport of liquid, as shown in Figure 1, space C is filled with liquid due to the water supply from the water intake hole 6a, and when the gas-liquid drive unit 1 reaches the position shown in Figure 4 above due to the rotation of the shaft 4 from this state, the liquid that had filled space C during this time is discharged from the drain hole 6b.

[0020] As the rotor 3 continues to rotate, the space A formed between the side 3a and the inner circumferential surface of the housing 2 narrows, and exhaust from the exhaust holes 5b begins. When the rotor 3 rotates to the position shown in Figure 5, for example, the volume of the space A formed between the side 3a and the inner circumferential surface of the housing 2 becomes zero, and exhausting is completed.

[0021] On the other hand, with regard to the transport of the liquid, as shown in Figure 4, the liquid is further discharged from the drain hole 6b, and when the discharge is completed, as the shaft 4 continues to rotate, gas is sucked into space C through the intake hole 5a, as shown in Figure 5.

[0022] Thereafter, while the rotor 3 moves to the position shown in Fig. 6, the space A becomes negative pressure again as shown in Fig. 3, and liquid is supplied to the space A from the water intake holes 6a, and when the rotor 3 further moves to the position shown in Fig. 7, the liquid that has been sucked into the space A and filled it begins to be discharged from the drainage holes 6b. Thereafter, the liquid is exhausted from the drainage holes 6b until the rotor 3 returns to the initial position shown in Fig. 1, and the supply process of gas and liquid through the space A by one rotation of the rotor 3 is completed.

[0023] During this time, sides 3b and 3c formed on the rotor 3 also move, and the gas and liquid are transported in the same manner as in space A. For example, in the case of space B, the gas stored in the initial position in Fig. 1 is exhausted from exhaust hole 5b while rotor 3 moves to the position shown in Fig. 4, and space B then becomes negative pressure, so water is supplied from water intake hole 6a, and when rotor 3 then rotates to the position shown in Fig. 5, space B becomes positive pressure, and the filled liquid is discharged from drain hole 6b. Then, when rotor 3 rotates further to the position shown in Fig. 6, air is drawn into space B, which has once again become negative pressure, from intake hole 5a, and the above process is repeated.

[0024] The same is true for the space C formed between the edge 3c formed on the rotor 3 and the inner surface of the housing 2. When negative pressure is applied to the space C due to the rotation of the rotor 3, gas or liquid is sucked in through the intake hole 5a or 6a, and when positive pressure is applied, the fully sucked gas or liquid is discharged through the exhaust hole 5b or drain hole 6b, thereby alternately transporting the gas and liquid.

[0025] As described above, in the pump 1 of this example, the rotor 3 has three sides 3a, 3b, and 3c, and when the rotor 3 makes one rotation, it can efficiently send gas to the intake hole 5a and exhaust hole 5b using the spaces A to C formed between each of the three sides 3a, 3b, and 3c and the inner circumferential surface of the housing 2, and simultaneously send liquid from the intake hole 6a to the drain hole 6b. Therefore, compared to conventional pumps, it is possible to simultaneously send gas and liquid to the desired device more efficiently.

[0026] Furthermore, the pump 1 of this embodiment is a rotary pump, which does not vibrate due to pulsation as occurs in piston-type pumps and the like, making it possible to realize a low-noise pump.

[0027] Furthermore, by applying dimple processing to the inner surfaces of the intake holes 5a, 6a and the exhaust holes 5b, 6b, resistance to the air flow can be reduced, allowing for smooth intake and exhaust, making it possible to manufacture an even more efficient pump.

[0028] FIG. 8 is a diagram illustrating an example of a pneumatic liquid drive unit according to another embodiment, in which a plurality of pneumatic liquid drive units 1a, 1b are connected in series, for example, by pipes 8a, 8b. By using a device in which a plurality of pneumatic liquid drive units 1 of this embodiment are connected in series in this way, it is possible to propose a liquid drive unit that is even more pressurized.

[0029] Furthermore, by using a device in which a number of pneumatic and liquid drive units 1a, 1b, 1c, . . . are connected in series, a more pressurized liquid drive unit can be proposed.

[0030] On the other hand, Fig. 9 shows an example in which multiple gas-liquid drive units 1a, 1b are connected in parallel. By using a device in which multiple gas-liquid drive units 1 of this example are connected in parallel in this way, it is possible to propose a gas-liquid drive unit that can transport even larger amounts of gas and liquid simultaneously.

[0031] In this case as well, by using a device in which even more gas-liquid drive units 1a, 1b, 1c, etc. are connected in parallel, it is possible to propose a gas-liquid drive unit that can simultaneously transport even larger amounts of gas and liquid.

[0032] FIG. 10 is a diagram illustrating a state in which a plurality of pneumatic / liquid drive units of this embodiment are connected in series or parallel when actually used. As shown in the figure, two gas-liquid drive units 1a and 1b are connected by a coaxial shaft 4, and a drive motor for rotating the two gas-liquid drive units 1a and 1b is connected to the shaft 4. For example, a rotary engine (not shown) is connected as this drive motor.

[0033] The series-type pneumatic-liquid drive unit shown in FIG. 8 can be constructed by connecting the exhaust hole 5b of the pneumatic-liquid drive unit 1a shown in the same figure to the intake hole 5a of the pneumatic-liquid drive unit 1b, and connecting the drain hole 6b of the pneumatic-liquid drive unit 1a to the water intake hole 6a of the pneumatic-liquid drive unit 1b.

[0034] Furthermore, by connecting the two intake holes 5a of the gas-liquid drive units 1a and 1b, connecting the two exhaust holes 5b, and connecting the two water intake holes 6a and the two exhaust holes 6b, it is possible to configure a parallel gas-liquid drive unit that pressurizes and drives gas and liquid in both the gas-liquid drive units 1a and 1b simultaneously (Fig. 9).

[0035] Meanwhile, in the above embodiment, the gas-liquid drive unit 1 of this example has been described as a device that simultaneously pressurizes and drives gas and liquid such as water, but when multiple gas-liquid drive units 1a, 1b are used in series or in parallel as described above, one gas-liquid drive unit (for example, gas-liquid drive unit 1a) can be used as a gas pressurization drive unit, and the other gas-liquid drive unit (for example, gas-liquid drive unit 1b) can be used as a liquid pressurization drive unit.

[0036] In this case, the air-liquid drive unit 1a can use the intake hole 6a as an intake hole and the drain hole 6b as an exhaust hole, and the air-liquid drive unit 1b can use the intake hole 5a as an intake hole and the exhaust hole 5b as a drain hole.

[0037] Furthermore, by using a rotary engine for the shaft 4 to drive the pneumatic-liquid drive unit of this example, it is possible to control it in synchronization with load fluctuations, and to perform smooth and stable drive. In other words, it is possible to provide a pneumatic-liquid drive unit that produces little noise.

[0038] Furthermore, the gas-liquid drive device of this embodiment can pressurize and drive large amounts of gas and liquid, and the device can also be made compact.

[0039] In addition, in the above Figure 10, an example of two pneumatic-liquid drive units 1a and 1b has been explained, but this is not limited to two units, and it is of course possible to configure a pneumatic-liquid drive unit by connecting three, four, etc. units. [Explanation of symbols]

[0040] 1, 1a, 1b, ... Air-liquid drive unit 2. Housing 3. Rotor 3a, 3b, 3c...side 3d··Rotor gear 4. Shaft 4a··Shaft gear 5a Air intake 5b Exhaust hole 6a...Water absorption hole 6b...Drain hole 8a, 8b Pipe

Claims

1. a housing having an inner peripheral surface with a pretrochoid curve; a rotor having three vertices and three sides connecting the vertices, the rotor rotating with the three vertices in contact with the inner circumferential surface of the housing; a shaft that transmits a rotational driving force to the rotor via a gear and has a rotation axis at a position different from the rotation axis of the rotor; a suction hole and a discharge hole provided in the housing, A gas-liquid drive device characterized in that gas or liquid is sucked through the suction hole into a space formed between each of three sides of the rotor and the inner peripheral surface of the housing, the gas or liquid accumulated in the space is discharged through the discharge hole as the rotor rotates, and a fixed amount of gas or liquid is sent from the suction hole to the discharge hole.

2. 2. The pneumatic-liquid drive unit according to claim 1, wherein the suction hole and the discharge hole provided in the housing comprise a pair of an air intake hole and a discharge hole for sucking in and discharging gas, and a pair of a water intake hole and a drain hole for sucking in and discharging liquid.

3. 2. The pneumatic-liquid drive device according to claim 1, wherein the suction holes and exhaust holes provided in the housing comprise a pair of a first intake hole and an exhaust hole for sucking in and exhausting gas, and a pair of a second intake hole and an exhaust hole for similarly sucking in and exhausting gas.

4. 2. The pneumatic-liquid drive unit according to claim 1, wherein the suction holes and discharge holes provided in the housing comprise a pair of first suction holes and discharge holes for sucking in and discharging liquid, and a pair of second suction holes and discharge holes for similarly sucking in and discharging liquid.

5. 5. The pneumatic-liquid drive system according to claim 1, wherein a plurality of said pneumatic-liquid drive systems are connected in series or in parallel.

6. 6. The pneumatic-liquid drive unit according to claim 5, wherein at least one of the plurality of pneumatic-liquid drive units connected in series or parallel has the pair of first and second intake and exhaust holes.

7. 6. The pneumatic-liquid drive unit according to claim 5, wherein at least one of the plurality of pneumatic-liquid drive units connected in series or parallel is provided with the pair of first and second water intake holes and drainage hole.

8. 8. The pneumatic-liquid drive unit according to claim 1, wherein the gear ratio between the rotor-side gear and the shaft-side gear is 3:

2.

9. 8. The pneumatic-liquid drive unit according to claim 1, wherein the inner peripheral surfaces of the suction hole and the discharge hole are dimpled.

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