Cavitation generation device structured to have dual rotors

Abstract

The present invention relates to a cavitation generation device structured to have dual rotors. The cavitation generation device, which induces cavitation reactions in a target fluid, comprises: a driving rotary part in which two motors having rotary shafts face each other from a predetermined distance in a frame; a pair of mechanical seal cover housings having one surface and the other surface, which are orthogonal to the respective rotary shafts of the two motors, and through which the rotary shafts symmetrically penetrate; mechanical seals mounted to be in close contact with the outer surfaces of the respective rotary shafts penetrating through the inside of the mechanical seal cover housings; a casing disposed between the pair of mechanical seal cover housings, extended to have one surface and the other surface, which are orthogonal to the two rotary shafts respectively penetrating through the mechanical seal cover housings and through which the rotary shafts symmetrically penetrate, and having, at one side of the circumferential surface thereof, a fluid discharge hole communicating with the inside thereof; two rotors which are axially coupled to rotate in different directions with respect to the rotary shafts respectively penetrating through one surface and the other surface of the casing while engaging with each other at a gap of a predetermined distance inside the casing, and which have a plurality of fluid-passing holes formed in the arc direction on concentric circles spaced a predetermined distance from a central portion; and a Y-shaped branch pipe having one end formed as a fluid inflow passage into which the target fluid flows, and having the other ends formed as branch passages respectively connected to communicate with the inside of the pair of cover housings.

Description

Cavitation generator with dual rotor structure

[0001] The present invention relates to a cavitation generating device having a dual rotor structure, and more specifically, to a cavitation generating device having a dual rotor structure in which fluids causing a cavitation reaction in a gap between the dual rotor structures are sucked / discharged in a direction opposite to the rotational direction of the rotors, thereby reducing the flow resistance and discharge resistance of the fluids.

[0002] In general, a cavitation generator functions to mix fluids by sucking them in the axial direction of a rotating chamber and discharging them in the circumferential direction.

[0003] These cavitation generating devices typically implement a mechanism in which the fluid is accelerated and pressurized by radial centrifugal force as the rotor rotates in one direction and is discharged.

[0004] According to the above mechanism, as the rotor rotates, fluid is sucked in through the suction port, and the sucked fluid is discharged simultaneously with the pressurization through the discharge port by the action of centrifugal force, thereby continuously performing the mixing action of the fluid, etc.

[0005] Meanwhile, as the fluid on one side of the rotor accelerates due to centrifugal force, its pressure decreases, so the pressure on one side of the rotor becomes lower than that on the opposite side. In this way, when the pressure on one side of the rotor becomes lower than that on the other side, the pressure difference applies a so-called axial thrust force to the rotor.

[0006] Conventional cavitation generating devices such as this have the following problems.

[0007] First, since the axial thrust increases in proportion to the rotational speed of the rotor, there was a problem that a separate means, such as a thrust bearing, had to be provided to support the rotational axis while supporting the increasing axial thrust.

[0008] Second, when axial thrust is generated, there is a problem that energy efficiency is reduced and energy loss increases by increasing the frictional force generated on the rotational axis of the rotor.

[0009] Third, when the rotor continuously rotates in one direction, the flow of fluid flowing into the suction port rotates in a swirling manner in the direction of rotation of the rotor. When the fluid on the suction port is sucked in with inertia that rotates in one direction, the performance of accelerating the rotational speed of the fluid due to contact with the rotor is reduced. Therefore, the reduction in acceleration performance causes a reduction in suction capacity, which ultimately acts as a cause of lowering the overall efficiency of the cavitation generating device.

[0010] The present invention is intended to solve the problems described in the above background art, and the main purpose of the present invention is to provide a cavitation generating device having a dual rotor structure that can maintain the suction performance and discharge performance of the fluid at a certain level or higher, thereby improving the overall efficiency of the device.

[0011] Another object of the present invention is to provide a cavitation generating device having a dual rotor structure that can have a small rotor diameter while having superior performance.

[0012] Another object of the present invention is to provide a cavitation generating device having a dual rotor structure capable of expecting a stable cavitation reaction by achieving pressure equilibrium in the process in which a fluid flowing in through a Y-shaped branch pipe branches off and moves to each of the coaxially installed rotors.

[0013] In addition to the above-mentioned clear purpose, the present invention may aim to achieve other purposes that can be easily derived by a person skilled in the art from the overall description of this specification.

[0014] In order to achieve the above object, a cavitation generating device having a dual rotor structure according to a first embodiment of the present invention is a cavitation generating device (100) that causes a cavitation reaction for a target fluid, comprising: a drive rotating unit (110) in which two motors (111, 112) having rotation axes formed on a frame are provided facing each other at a predetermined distance; a pair of mechanical seal cover housings (120, 120') in which the rotation axes are formed symmetrically and penetrate each other with respect to one surface and the other surface perpendicular to the rotation axes of the two motors (111, 112); a mechanical seal (130, 130') that is mounted in close contact with the outer surface of each rotation axle that penetrates the interior of the mechanical seal cover housing (120, 120'); A casing (140) disposed between a pair of mechanical seal cover housings (120, 120'), wherein the rotation axes are formed to extend symmetrically through one side and the other side perpendicular to each other and penetrate the pair of mechanical seal cover housings (120, 120'), and a fluid discharge hole (141) communicating with the interior is formed on one side of the circumference; two rotors (150, 150') are coupled to each other so as to rotate in different directions about the rotation axes that penetrate the one side and the other side of the casing (140) while interlocking with each other with a gap (T) at a predetermined interval within the casing (140), and a plurality of fluid passage holes (152, 152') are formed in an arc direction on a concentric circle spaced apart from the center at a predetermined interval; And it is configured to include a Y-shaped branch pipe (160) which is formed at one end by a fluid inlet passage (161) through which a target fluid is introduced, and at the other end by a branch passage (162) which is connected to the inside of each of the pair of mechanical seal cover housings (120, 120').

[0015] According to a cavitation generating device having a double rotor structure according to a second embodiment of the present invention for achieving the above purpose, the fluid passage hole (152, 152') is formed such that the central axis on the fluid intake port (152a, 152a') side and the central axis on the fluid discharge port (152c, 152c') side are inclined at a constant angle in the opposite direction to the rotational direction of the rotor (150, 150'), or are formed such that they are twisted at a constant curvature in the opposite direction to the rotational direction of the rotor (150, 150').

[0016] In the context of the second embodiment, the fluid passage hole (152, 152') is formed with a structure in which a fluid movement space (152b, 152b') formed between the central axis on the fluid intake port (152a, 152a') side and the central axis on the fluid discharge port (152c, 152c') side is inclined at an angle of 10 to 45° with respect to the horizontal or vertical direction of the central axis of the rotor (150, 150').

[0017] In another context of the second embodiment, the fluid passage hole (152, 152') is formed with a structure in which a fluid movement space (152b, 152b') formed between the central axis on the fluid intake port (152a, 152a') side and the central axis on the fluid discharge port (152c, 152c') side is twisted at a constant curvature within a range of an inclination angle of 10 to 45° with respect to the horizontal or vertical direction of the central axis of the rotor (150, 150').

[0018] Meanwhile, according to the cavitation generating device having a dual rotor structure according to the third embodiment of the present invention for achieving the above purpose, the fluid passage hole (152, 152') may be formed in any one cross-sectional shape selected from a circle or an oval.

[0019] According to a cavitation generating device having a dual rotor structure according to a fourth embodiment of the present invention for achieving the above object, the two rotors (150, 150') each have a plurality of grooves (151) and protrusions (151') formed at equal intervals on one side or the other side, and the plurality of grooves (151) and protrusions (151') formed on each of the two rotors (150, 150') are configured to have a structure in which the height thereof gradually decreases at equal intervals on an outer concentric circle, or the height thereof is the same at equal intervals on an outer concentric circle, or the height thereof gradually increases at equal intervals on an outer concentric circle.

[0020] In the context of the fourth embodiment, the cross-sectional shape of the groove (151) and the protrusion (151') may be at least one selected from among a square, a triangle, a trapezoid, a semicircle, and a wave pattern.

[0021] Meanwhile, according to the cavitation generating device having a double rotor structure according to the fifth embodiment of the present invention for achieving the above purpose, the fluid passage hole (152, 152') is configured with a structure in which the cross-sectional area thereof gradually widens in the direction of movement of the fluids, or gradually narrows in the direction of movement of the fluids.

[0022] According to a cavitation generating device having a dual rotor structure according to the sixth embodiment of the present invention for achieving the above purpose, 8 to 10 fluid passage holes (152, 152') can be formed at regular intervals in the arc direction of the rotor (150, 150').

[0023] According to a cavitation generating device having a dual rotor structure according to the seventh embodiment of the present invention for achieving the above purpose, the Y-shaped branch pipe (160) branches off from the branch passage (162) so that the pressure of the flowing target fluid is maintained in a balanced state.

[0024] According to a cavitation generating device having a dual rotor structure according to the eighth embodiment of the present invention for achieving the above purpose, one side of the inside of the mechanical seal cover housing (120, 120') forms a cooling space for the target fluid as a space sealed with a mechanical seal (130, 130').

[0025] According to a cavitation generating device having a dual rotor structure according to the ninth embodiment of the present invention for achieving the above purpose, a gap adjusting means (170) for adjusting the gap between rotors (150, 150') may be provided on the other side of the fluid discharge hole (141).

[0026] Specific details of other embodiments are included in the specific contents for carrying out the invention, etc.

[0027] A cavitation generating device having a dual rotor structure according to an embodiment of the present invention has the effect of significantly reducing the flow resistance and discharge resistance of fluids by causing fluids that cause a cavitation reaction in the gap between the dual rotors to be sucked / discharged in the opposite direction to the rotational direction of the rotors.

[0028] In addition, the cavitation generating device having a dual rotor structure according to an embodiment of the present invention has the effect of providing a cavitation generating device having superior performance while allowing the diameter of the rotor to be configured to be small because the two rotors installed on the same axis maximize the rotational moment while performing so-called double reverse rotation.

[0029] In addition, the cavitation generating device having a dual rotor structure according to an embodiment of the present invention has the effect of promoting a stable cavitation reaction by achieving pressure equilibrium in the process in which the fluid flowing in through the Y-shaped branch pipe branches out and moves to each of the coaxially installed rotors.

[0030] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0031] FIG. 1 is a drawing showing the appearance of a cavitation generating device having a dual rotor structure according to an embodiment of the present invention;

[0032] FIG. 2 is a vertical cross-sectional view of a portion of a cavitation generating device having a dual rotor structure according to an embodiment of the present invention;

[0033] FIG. 3 is a drawing showing one side shape of a rotor in a cavitation generating device having a dual rotor structure according to an embodiment of the present invention.

[0034] FIG. 4 is a drawing showing the shape of the rotor surface in a cavitation generating device having a dual rotor structure according to an embodiment of the present invention.

[0035] FIG. 5 and FIG. 6 are drawings showing the planar shape and cross-sectional shape of the rotor in a cavitation generating device having a dual rotor structure according to an embodiment of the present invention.

[0036] FIG. 7 is a drawing showing several examples of groove cross-sectional shapes according to an embodiment of the present invention.

[0037] Hereinafter, a cavitation generating device having a dual rotor structure according to an embodiment of the present invention will be described in detail with reference to the attached drawings. For reference, in describing the present invention, specific descriptions of related known functions are omitted to avoid obscuring the gist of the invention.

[0038] FIG. 1 is a drawing showing the appearance of a cavitation generating device having a dual rotor structure according to the present invention, and FIG. 2 is a vertical cross-sectional view of a portion of the cavitation generating device having a dual rotor structure according to the present invention.

[0039] Referring to FIGS. 1 and 2, a cavitation generating device (100) according to the present invention is configured to cause a cavitation reaction for a suctioned target fluid, and includes a driving rotating part (110), a pair of mechanical seal cover housings (120, 120'), a mechanical seal (130, 130'), a casing (140), two rotors (150, 150'), and a Y-shaped branch pipe (160).

[0040] As shown in Fig. 1, the driving rotation part (110) of the present invention is provided with two motors (111, 112) having a rotation axis formed on a frame and facing each other at a certain distance.

[0041] The rotation axis formed in the above motors (111, 112) rotates at a constant speed according to a preset control command, and a control signal or control command for controlling the speed of the rotation axis can be input through a separately provided control panel, etc.

[0042] The mechanical seal cover housing (120, 120') of the present invention is provided with a pair of housings through which the rotation axes of the motors (111, 112) pass, and the rotation axes are formed to pass through symmetrically with respect to one side and the other side perpendicular to the rotation axes of the two motors (111, 112).

[0043] The mechanical seal (130, 130') of the present invention is mounted in close contact with the outer surface of each rotating shaft penetrating the interior of the mechanical seal cover housing (120, 120') to prevent fluid leakage. For reference, the mechanical seal (130, 130') corresponds to a configuration that is already known and widely used, and thus a detailed description thereof will be omitted.

[0044] Here, one side of the inside of the mechanical seal cover housing (120, 120') is sealed with a mechanical seal (130, 130') to form a cooling space for the target fluid, so that a function can be added to cool the target fluid during the circulating process.

[0045] Meanwhile, the casing (140) of the present invention is disposed between the pair of mechanical seal cover housings (120, 120'), and is formed to extend symmetrically through one side and the other side perpendicular to the two rotation axes that penetrate the pair of mechanical seal cover housings (120, 120'), and a fluid discharge hole (141) communicating with the interior is formed on one side of the circumferential surface.

[0046] According to a further embodiment of the present invention, a gap adjusting means (170) may be provided on the other side of the fluid discharge hole (141) formed in the casing (140) to adjust the gap between the rotors (150, 150').

[0047] The two rotors (150, 150') of the present invention are formed with a plurality of grooves (151) and protrusions (151') at equal intervals on the inside of the casing (140), and are coupled to each other in a state where the surfaces thereof are interlocked with each other with a gap (T) at a constant interval, and rotate in different directions on a rotation axis penetrating one side and the other side of the casing (140), and a plurality of fluid passage holes (152, 152') are formed in an arc direction on a concentric circle spaced apart from the center at a constant interval.

[0048] According to a further embodiment of the present invention, the plurality of grooves (151) and protrusions (151') formed on the two rotors (150, 150') may be formed in a structure in which the height thereof gradually decreases at equal intervals on the outer concentric circles. In addition, the plurality of grooves (151) and protrusions (151') formed on the two rotors (150, 150') may be formed in a structure in which the height thereof gradually increases at equal intervals on the outer concentric circles.

[0049] FIG. 7 is a drawing showing several examples of groove cross-sectional shapes according to an embodiment of the present invention.

[0050] Referring to FIG. 7, the cross-sectional shape of the groove (151) and the protrusion (151') formed in the two rotors (150, 150') may be at least one selected from among a square, a triangle, a trapezoid, a semicircle, and a wave pattern.

[0051] Meanwhile, according to the configuration of the above rotor (150, 150'), a so-called dual structure is formed by arranging a pair facing each other, and operating the rotational directions so as to be mutually aligned, thereby allowing reactions such as shearing and cavitation of fluids due to rotational force to occur quickly.

[0052] In addition, according to the configuration of the above rotor (150, 150'), since the two rotors (150, 150') installed on the same axis maximize the rotational moment while performing so-called double reverse rotation or twin rotation, the diameter of the rotor (150, 150') can be configured to be small, while providing a cavitation generating device with superior performance.

[0053] FIG. 3 is a drawing showing one side shape of a rotor in a cavitation generating device having a dual rotor structure according to the present invention, and FIG. 4 is a drawing showing the other side shape of a rotor in a cavitation generating device having a dual rotor structure according to the present invention.

[0054] Referring to FIGS. 3 and 4, the two rotors (150, 150') described above have a number of fluid passage holes (152, 152') formed in a circular direction on a concentric circle spaced apart from the center by a certain interval.

[0055] Here, it is preferable that the fluid passage holes (152, 152') are formed in a number of 8 to 10 at regular intervals in the arc direction of the rotor (150, 150') to minimize interference between fluids passing through the fluid passage holes (152, 152') and to achieve optimal function according to the cavitation reaction.

[0056] However, the above-mentioned fluid passage holes (152, 152') are merely a suggested number of formations within a range in which cavitation reaction efficiency is not reduced, and are not necessarily limited to the above-mentioned number, and can be appropriately increased or decreased depending on field conditions, processing capacity, etc.

[0057] In addition, the fluid passage hole (152, 152') is formed such that the central axis on the fluid intake port (152a, 152a') side and the central axis on the fluid discharge port (152c, 152c') side are inclined at a certain angle in the opposite direction to the rotational direction of the rotor (150, 150').

[0058] According to one embodiment of the present invention, the fluid passage hole (152, 152') may be configured such that the fluid movement space (152b, 152b') formed between the central axis on the fluid intake port (152a, 152a') side and the central axis on the fluid discharge port (152c, 152c') side is inclined at an angle of 10 to 45° with respect to the horizontal or vertical direction of the central axis of the rotor (150, 150').

[0059] From another perspective, the fluid passage holes (152, 152') are formed such that the central axis on the fluid intake port (152a, 152a') side and the central axis on the fluid discharge port (152c, 152c') side are twisted with a certain curvature in the opposite direction to the rotational direction of the rotor (150, 150').

[0060] According to one embodiment, the fluid passage hole (152, 152') may have a structure in which a fluid movement space (152b, 152b') formed between the central axis on the fluid intake port (152a, 152a') side and the central axis on the fluid discharge port (152c, 152c') side is twisted at a constant curvature within a range of an inclination angle of 10 to 45° with respect to the horizontal or vertical direction of the central axis of the rotor (150, 150').

[0061] The angular range limitation of the fluid passage hole (152, 152') as described above is determined to minimize the time for suction and discharge of the fluid, and it is preferable that the fluid passage hole (152, 152') maintains an inclination angle of 10 to 45° with respect to the horizontal or vertical direction of the central axis of the rotor (150, 150').

[0062] This is to facilitate movement of some fluids moving outward against centrifugal force from one side to the other side through the fluid passage holes (152, 152') of the rotor (150, 150'). For example, if the fluid passage holes (152, 152') are formed in a state parallel to the ground, the fluids moving by centrifugal force are more likely to be affected by a kind of bottleneck phenomenon when passing through the fluid passage holes (152, 152').

[0063] Meanwhile, FIGS. 5 and 6 are drawings showing the planar shape and cross-sectional shape of the rotor in a cavitation generating device having a dual rotor structure according to the present invention.

[0064] Referring to FIGS. 5 and 6, the mechanism for the fluid sucked / discharged through the fluid passage hole (152, 152') will be described. When the fluid starts to be sucked into the fluid suction port (152a, 152a') of the fluid passage hole (152, 152') of the rotor (150, 150') rotating at high speed in one direction, the fluid passes through the fluid movement space (152b, 152b') and is discharged through the fluid discharge port (152c, 152c') in the opposite direction to the rotational direction of the rotor (150, 150').

[0065] In this way, the reason why the fluid discharged from the two rotors (150, 150') rotating at high speed is in the opposite direction to the rotation direction of the rotors (150, 150') is that, as explained above, the fluid passage holes (152, 152') are formed so that the central axis on the fluid intake port (152a, 152a') side and the central axis on the fluid discharge port (152c, 152c') side are inclined at a certain angle in the opposite direction to the rotation direction of the rotors (150, 150'), or are formed so that they are twisted at a certain curvature in the opposite direction to the rotation direction of the rotors (150, 150').

[0066] If the flow of fluid flowing into the fluid passage hole (152, 152') of the rotor (150, 150') that continuously rotates in one direction is the same as the rotation direction of the rotor (150, 150'), it will rotate while generating a so-called vortex. In this case, the fluid sucked into the fluid suction port (152a, 152a') of the fluid passage hole (152, 152') will have inertia that rotates in one direction, so the performance of accelerating the rotation speed of the fluid is significantly reduced.

[0067] Therefore, as in the present invention, if the flow of fluid flowing into the fluid passage hole (152, 152') of the rotor (150, 150') that rotates in one direction is controlled in the opposite direction to the rotational direction of the rotor (150, 150'), the rotational speed of the fluid can be accelerated because the influence of resistance such as inertia is hardly affected, and as a result, the cavitation reaction efficiency can be significantly increased.

[0068] According to the present invention, the fluid passage hole (152, 152') as described above may be formed in any one cross-sectional shape selected from a circular or oval shape.

[0069] Here, the 'ellipse' is not limited to meaning only 'the locus of points where the sum of the distances from two vertices is constant', which is the mathematical definition of an ellipse. That is, the fluid passage hole (152, 152') having an 'ellipse' according to the present invention can also be interpreted as a shape formed by a curve having a relatively short width and a relatively long length, and four corners constituting the shape being formed to be convex outward.

[0070] In addition, according to the present invention, the fluid passage hole (152, 152') may be configured with a structure in which the cross-sectional area thereof gradually widens in the direction of movement of the fluids, or gradually narrows in the direction of movement of the fluids.

[0071] As described above, by gradually widening or narrowing the cross-sectional area of ​​the fluid passage hole (152, 152'), it is possible to configure the discharge pressure of the fluids to be appropriately controlled.

[0072] Meanwhile, as shown in FIG. 1 or FIG. 2, the Y-shaped branch pipe (160) of the present invention is formed at one end with a fluid inlet passage (161) through which a target fluid is introduced, and at the other end with a branch passage (162) which is connected to the inside of each of the pair of mechanical seal cover housings (120, 120') so that the overall shape forms a 'Y' shape when viewed from the front.

[0073] Here, the reason why the Y-branch pipe (160) is formed to branch off to both sides at the approximate midpoint of the fluid inlet passage (161) is to transport the fluid to the corresponding point through the branch passage (162) at the same pressure and speed. In other words, the Y-branch pipe (160) performs the function of maintaining the pressure of the target fluid flowing by branching off from the branch passage (162) in an equilibrium state.

[0074] As described above, the present invention can further improve the cavitation reaction efficiency by reducing the flow resistance and discharge resistance of the fluids by causing the fluids that cause the cavitation reaction in the gap between the dual-structured rotors to be sucked and discharged in the opposite direction to the rotational direction of the rotors.

[0075] In particular, the present invention provides a cavitation generating device having superior performance while allowing the rotor diameter to be small because two rotors installed on the same axis maximize the rotational moment while performing so-called double counter-rotation, and also enables a stable cavitation reaction by achieving pressure equilibrium in the process in which the fluid introduced through the Y-branch pipe branches off and moves to each of the coaxially installed rotors.

[0076] While the above-described embodiments of a cavitation generator with a dual-rotor structure according to the present invention have been described, they are merely illustrative of preferred embodiments of the present invention and are not intended to limit the scope of the invention. Furthermore, it will be apparent to those skilled in the art that various modifications and imitations are possible without departing from the spirit and scope of the present invention.

[0077] [Explanation of symbols]

[0078] T: Gap 100: Cavitation generating means

[0079] 110: Drive rotation part 111,112: Motor

[0080] 120,120': Mechanical seal cover housing

[0081] 130,130': Mechanical seal 140: Casing

[0082] 141: Fluid discharge hole 150,150': Rotor

[0083] 151: Home 151': Uneven

[0084] 152,152': Fluid passage hole 152a,152a': Fluid intake

[0085] 152b, 152b': Fluid movement space 152c, 152c': Fluid discharge port

[0086] 160: Y-branch 161: Fluid inlet passage

[0087] 162: Branch passage 170: Gap adjustment means

Claims

1. In a cavitation generating device (100) that causes a cavitation reaction to a target fluid, A drive rotation unit (110) in which two motors (111, 112) having a rotation axis formed on a frame are provided facing each other at a certain distance; A pair of mechanical seal cover housings (120, 120') formed symmetrically and penetratingly with respect to one side and the other side perpendicular to the rotation axes of each of the two motors (111, 112); A mechanical seal (130, 130') that is mounted in close contact with the outer surface of each rotating shaft penetrating the interior of the mechanical seal cover housing (120, 120'); A casing (140) disposed between the pair of mechanical seal cover housings (120, 120') and having two rotation axes extending symmetrically through one side and the other side perpendicular to each other through the pair of mechanical seal cover housings (120, 120'), and having a fluid discharge hole (141) formed on one side of the circumferential surface that communicates with the interior; Two rotors (150, 150') that are interlocked with each other with a gap (T) of a certain interval inside the casing (140) so as to rotate in different directions about a rotation axis that penetrates one side and the other side of the casing (140), respectively, and have a plurality of fluid passage holes (152, 152') formed in a circular direction in a concentric circle spaced apart from the center by a certain interval; and A cavitation generating device having a dual rotor structure characterized by a configuration including a Y-shaped branch pipe (160) which is formed at one end by a fluid inlet passage (161) through which a target fluid is introduced, and at the other end by a branch passage (162) which is connected to the inside of each of the pair of mechanical seal cover housings (120, 120').

2. In the first paragraph, a cavitation generating device having a dual rotor structure, characterized in that the central axis of the fluid passage hole (152, 152') on the fluid intake port (152a, 152a') side and the central axis of the fluid discharge port (152c, 152c') side are formed to be inclined at a constant angle in the opposite direction to the rotational direction of the rotor (150, 150'), or are formed to be twisted at a constant curvature in the opposite direction to the rotational direction of the rotor (150, 150').

3. In the second paragraph, the fluid passage hole (152, 152') is characterized in that the fluid movement space (152b, 152b') formed between the central axis on the fluid intake port (152a, 152a') side and the central axis on the fluid discharge port (152c, 152c') side is inclined at an angle of 10 to 45° with respect to the horizontal or vertical direction of the central axis of the rotor (150, 150').

4. In the second paragraph, the fluid passage hole (152, 152') is a cavitation generating device having a dual rotor structure, characterized in that the fluid movement space (152b, 152b') formed between the central axis on the fluid intake port (152a, 152a') side and the central axis on the fluid discharge port (152c, 152c') side is twisted at a constant curvature within a range of inclination angles of 10 to 45° with respect to the horizontal or vertical direction of the central axis of the rotor (150, 150').

5. A cavitation generating device having a dual rotor structure, characterized in that in the first paragraph, the fluid passage hole (152, 152') is formed in one cross-sectional shape selected from a circle or an ellipse.

6. In the first paragraph, the two rotors (150, 150') are each formed with a plurality of grooves (151) and protrusions (151') at equal intervals on one side or the other side, and the plurality of grooves (151) and protrusions (151') formed on each of the two rotors (150, 150') are formed to have a structure in which the height thereof gradually decreases at equal intervals on an outer concentric circle, or the height thereof is the same at equal intervals on an outer concentric circle, or the height thereof gradually increases at equal intervals on an outer concentric circle. A cavitation generating device having a dual rotor structure.

7. A cavitation generating device having a dual rotor structure, characterized in that in the 6th paragraph, the cross-sectional shape of the groove (151) and the protrusion (151') is at least one selected from a square, a triangle, a trapezoid, a semicircle, and a wave pattern.

8. In the first paragraph, a cavitation generating device having a dual rotor structure, characterized in that the cross-sectional area of ​​the fluid passage hole (152, 152') gradually widens in the direction of movement of the fluids, or gradually narrows in the direction of movement of the fluids.

9. A cavitation generating device having a dual rotor structure, characterized in that in the first paragraph, the fluid passage holes (152, 152') are formed in a number of 8 to 10 at regular intervals in the arc direction of the rotor (150, 150').

10. In the first paragraph, a cavitation generating device having a dual rotor structure, characterized in that the Y-shaped branch pipe (160) branches off from the branch passage (162) so that the pressure of the flowing target fluid is maintained in a state of equilibrium.

11. A cavitation generating device having a dual rotor structure, characterized in that in the first paragraph, one side of the interior of the mechanical seal cover housing (120, 120') forms a cooling space for the target fluid as a space sealed with a mechanical seal (130, 130').

12. A cavitation generating device having a dual rotor structure, characterized in that in the first paragraph, a gap adjusting means (170) is provided on the other side of the fluid discharge hole (141) to adjust the gap between the rotors (150, 150').

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