CN111229074B - Rotary gear drum type hydraulic cavitator - Google Patents
Rotary gear drum type hydraulic cavitator Download PDFInfo
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- CN111229074B CN111229074B CN202010017555.2A CN202010017555A CN111229074B CN 111229074 B CN111229074 B CN 111229074B CN 202010017555 A CN202010017555 A CN 202010017555A CN 111229074 B CN111229074 B CN 111229074B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/44—Mixers in which the components are pressed through slits
- B01F25/441—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
Abstract
The invention provides a rotary gear drum type hydrodynamic cavitator which comprises a driving mechanism, a static drum and a rotary drum, wherein the axis of the static drum is superposed with the axis of the rotary drum; the fixed teeth are spirally arranged on the inner wall of the static cylinder, the arrangement rule of the fixed teeth is consistent with that of the movable teeth, and a spiral surface which carries materials at the central feeding hole to an eccentric discharging hole through shearing cavitation of a shearing area is formed when the fixed teeth and the movable teeth move relatively. The invention has reasonable structural design, and the tooth structure arranged on the helicoid realizes automatic material suction through the rotation of the rotary drum and can realize automatic material suction and material conveying; the material has good convection property, high cavitation treatment efficiency and low processing cost.
Description
Technical Field
The invention relates to the technical field of mechanical equipment for forming vortex shearing cavitation by rotating a rotating drum, in particular to a rotating gear-drum type hydrodynamic cavitation device.
Background
The phenomenon of the explosive growth of micro-bubbles in a liquid at a certain temperature due to the evaporation of the liquid at a local low pressure (lower than the saturated vapor pressure of the liquid at the corresponding temperature) is called cavitation inception, and when the liquid pressure is recovered, the bubble groups collapse. The cavitation bubbles instantly generate huge energy when collapsing so as to generate strong shearing force in fluid, the shearing force can break carbon bonds on a macromolecule main chain and destroy microbial cell walls, and thus macromolecule organic matters are degraded and microbes are inactivated. The process of growth, development and collapse of the vapor bubble mass in the liquid and the resulting series of physical and chemical reactions is called cavitation. Can be applied to biochemical engineering, petroleum engineering, environmental protection engineering and the like.
The existing fixed rotor type cavitators are found by combining the existing scientific research results, and have a single cavitation mechanism, such as US20050042129a1, CN109796061A, CN109821434A, CN109821435A, CN109824174A, CN109824175A, CN109824176A, CN109824218A, CN109824226A, CN109824136A, CN109824137A, CN109824138A, CN109855316A, CN109761225A, CN109845818A, CN109761225A, CN109761229A and CN109855165A, which mainly generate cavitation by centrifugal force, and the cavitators have poor internal convection, so that liquid is not easy to flow out after entering blind holes, and most liquid flow cannot be cavitated and is discharged. CN109824216A, CN109824217A opened spiral groove in the rotor blind hole, enhanced the convection current, but did not have the axial feeding effect. Other fixed rotor type cavitators, such as CN106669481A and CN108114682A, are fixed rotor type fluted disc cavitators, which have good convection but low cavitation rate, and if the number of shearing times is increased, only the number of gear rings is increased, which can overload the transmission shaft, and have a certain limitation, and the number of cavitation treatment layers cannot be flexibly changed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the invention provides a rotary tooth cylinder type hydraulic cavitator which can realize automatic material suction through the rotation of a rotary cylinder, and liquid flow passes through a throttling layer of a radial interdental space to be subjected to throttling shearing action, is released between an axial interdental space and a radial interdental space, is collapsed after forming cavitation bubbles, enhances the convection property of materials and improves the treatment efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows: a rotary gear drum type hydrodynamic cavitation device comprises a driving mechanism, a static drum and a rotary drum, wherein the rotary drum is arranged in the static drum, the output end of the driving mechanism is in transmission connection with the rotary drum, the axis of the static drum is coincident with the axis of the rotary drum, a central feed port is arranged at the central position of the front end of the static drum, an eccentric discharge port is arranged at the position below the central position of the rear end, the static drum is cylindrical, fixed teeth are equidistantly distributed on the inner wall of the static drum, movable teeth are equidistantly distributed on the outer wall of the rotary drum, gaps are formed between the fixed teeth and the movable teeth, and a shearing area is formed by the gaps; the fixed teeth are spirally arranged on the inner wall of the static cylinder, the arrangement rule of the fixed teeth is consistent with that of the movable teeth, and a helicoid which carries materials at the central feed port to an eccentric discharge port through shearing cavitation of a shearing area is formed when the fixed teeth and the movable teeth move relatively.
In the above scheme, along with rotating rotatory, rely on the helicoid that moves tooth and decide tooth formation, can realize automatic material of inhaling, simultaneously because the existence of helicoid, can move the clearance transport of tooth and decide the clearance between the tooth to next from the last tooth of moving along the helicoid with the material, the high strength cavitation of continuously taking place in the transportation, the molecular chain breaks to realize functions such as emulsification dispersion, antibacterial sterilization, waste water treatment.
Furthermore, the fixed teeth are spirally arranged on the inner wall of the static cylinder in the axial direction relative to the static cylinder, namely, a plurality of circles of fixed teeth are arranged on the inner wall of the static cylinder at equal intervals along the axial direction of the static cylinder, a plane formed by each circle of fixed teeth is parallel to the radial plane of the static cylinder, a spiral angle alpha is sequentially rotated between each circle of fixed teeth along the circumferential direction of the static cylinder along the direction from the central feeding port to the eccentric discharging port, and the angle range of the spiral angle alpha is-30 degrees.
Furthermore, the fixed teeth are spirally arranged on the inner wall of the static cylinder relative to the radial plane of the static cylinder, namely a plurality of fixed teeth are arranged on the inner wall of the static cylinder at equal intervals along the axial direction of the static cylinder, a straight line formed by each fixed tooth is parallel to the axial direction of the static cylinder, each fixed tooth sequentially rotates along the axial direction of the static cylinder and has a helix angle beta, and the angle range of the helix angle beta is-30 degrees.
Furthermore, the tooth profiles of the fixed teeth and the movable teeth are fan-shaped teeth with equal central angles, rectangular teeth with equal tooth widths, cylindrical teeth or trapezoidal teeth with tooth crest wedge angles gamma; the angle range of the addendum wedge angle gamma of the trapezoidal tooth with the addendum wedge angle gamma is-30 degrees to-30 degrees. The fan-shaped teeth with the equal central angle can ensure that the vapor content in the cavitator changes in a sine periodic manner along with the rotation time, and the rectangular teeth with the equal tooth width have higher cavitation rate than the fan-shaped teeth with the equal central angle through simulation calculation, but do not change in a periodic manner. The cylindrical teeth can increase the volume of the gaps between the teeth, improve the convection property between the teeth and prevent the short circuit phenomenon. The trapezoidal tooth structure with the tooth crest wedge angle enables the negative pressure area to move to the inclination angle diffusion area, so that the area of the negative pressure area is increased, and the cavitation efficiency is improved. In this embodiment, the positive and negative representative directions of the angle in the angle range are limited to 30 ° in consideration of insufficient strength near the tooth crest when the angle is too large.
Furthermore, the ratio of the number of fixed teeth in the circumferential direction of the static cylinder to the number of movable teeth in the circumferential direction of the rotary cylinder is 1 to 1.5. The quiet section of thick bamboo is installed in the rotary drum outside, and consequently quiet section of thick bamboo inner circular surface girth is greater than the outer disc of rotary drum, and multiplicable number of teeth can make fixed tooth circumferential direction clearance reduce with increase shearing area, nevertheless too much the number of teeth to reduced the space of cavitation full development, cavitation efficiency can reduce.
Furthermore, when the rotating gear rotates, the pressure in front of the moving gear is larger than the pressure in back of the moving gear, the circumferential thickness can affect the strength of the gear, the ratio of the circumferential thickness of the fixed gear to the gear height is 0.5-1.5, and the ratio of the circumferential thickness of the moving gear to the gear height is 0.5-1.5.
Furthermore, the ratio of the axial thickness to the circumferential thickness of the fixed teeth is 0.8-1.2, and the ratio of the axial thickness to the circumferential thickness of the movable teeth is 0.8-1.2. The parameters influence the shape of the rectangular teeth, the square teeth have the highest cavitation rate, but the parameters can be changed according to specific processing conditions or special requirements, and the given range is limited within the safe strength of the teeth.
Furthermore, the axial distance of the fixed teeth is 0.25-2 times of the axial thickness of the fixed teeth, and the axial distance of the movable teeth is 0.25-2 times of the axial thickness of the movable teeth. The area between each layer of movable gear ring and the next gear ring is also the area for the initiation, development and collapse of cavitation bubbles, the short distance is equivalent to the increase of the density of the gear rings on the original length, the cavitation in the circumferential tooth gap can be increased, the cost is high, and the efficiency is high; if the distance is long, the axial gap is selected as a main cavitation area, so that the cost is low and the efficiency is low.
Furthermore, the tooth height ratio of the fixed teeth to the movable teeth is 0.5-1. A part of liquid close to the wall surface between the fixed teeth can directly slide into the next gear ring without cavitation, the height of the fixed teeth can be reduced, the phenomenon can be avoided, the cavitation efficiency can also be reduced, two influence factors need to be integrated in actual model selection, and the ratio of the tooth height of the fixed teeth to the tooth height of the movable teeth is 0.8, which is the optimal solution.
Furthermore, the circumferential distance of the fixed teeth is 0.7-1.3 times of the circumferential tooth thickness of the fixed teeth, and the circumferential distance of the movable teeth is 0.7-1.3 times of the circumferential tooth thickness of the movable teeth. The circumferential clearance space of the fixed teeth and the movable teeth is an important area for cavitation initiation and collapse, the clearance is too small, cavitation bubbles are not fully developed, the clearance is too large, the shearing area is insufficient, and the efficiency is reduced.
The rotary toothed drum type hydrodynamic cavitator has the beneficial effects that the structural design is reasonable, the tooth structures arranged on the spiral surfaces realize automatic material suction through the rotation of the rotary drum, and automatic material suction and material conveying can be realized; the liquid flow is subjected to the throttling shearing action through the throttling layer in the radial inter-tooth space, and is released between the axial inter-tooth space and the radial inter-tooth space to form cavitation bubbles, so that the cavitation bubbles are collapsed, the convection property of materials is enhanced, the treatment efficiency is improved, the inlet and the outlet of the cavitator can exchange positions as required, the material conveying and feeding direction is changed, and meanwhile, the tooth structure arranged on the helicoid can be formed by processing through milling cutters in two directions, so that the processing cost is low.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural diagram of the preferred embodiment of the present invention.
FIG. 2 is a cross-sectional view of the cavitator of the preferred embodiment of the present invention taken along the X-axis.
FIG. 3 is a cross-sectional view of the cavitator of the preferred embodiment of the present invention taken along the Z-axis.
Fig. 4 is a schematic structural diagram of the cavitator with the tooth shape being rectangular teeth with equal tooth width according to the preferred embodiment of the invention.
Fig. 5 is a schematic structural view of the cavitator according to the preferred embodiment of the present invention, wherein the movable teeth are provided with tip wedge angles γ, and the fixed teeth are rectangular teeth with equal tooth widths.
Fig. 6 is a schematic structural view of the cavitator according to the preferred embodiment of the present invention, wherein the tooth profile of the cavitator is a fixed tooth with a tip wedge angle γ, and the moving tooth is a rectangular tooth with equal tooth width.
Fig. 7 is a schematic structural diagram of the cavitator according to the preferred embodiment of the present invention, wherein the tooth profile of the cavitator is a fixed tooth and the tooth profile of the cavitator has a tip wedge angle gamma.
FIG. 8 is a schematic structural diagram of the rotating cylinder in the cavitator of the preferred embodiment of the present invention, wherein the helicoids are arranged to spiral axially relative to the static cylinder.
FIG. 9 is a schematic structural diagram of the rotating cylinder in the cavitator of the preferred embodiment of the present invention, wherein the helicoids are arranged to spiral radially with respect to the static cylinder.
In the figure, the device comprises a central feeding hole 1, a static cylinder 3, a rotary cylinder 4, fixed teeth 5, movable teeth 6, a transmission shaft 7, an axial inter-tooth area 8, an eccentric discharging hole 9, an inter-fixed-tooth area 10, a movable inter-tooth area 11, screws 12, an intermediate flange 13, a rigid coupling 14, a motor flange 15, a motor 16, a frame 17 and a frame saddle.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The rotating gear-cylinder hydrodynamic cavitator shown in fig. 1 to 3 is a preferred embodiment of the present invention, and comprises a driving mechanism, a static cylinder 2 and a rotating cylinder 3, wherein the rotating cylinder 3 is arranged in the static cylinder 2, an output end of the driving mechanism is in transmission connection with the rotating cylinder 3, and an axis of the static cylinder 2 coincides with an axis of the rotating cylinder 3.
For ease of support and installation, the drive mechanism and the stationary drum 2 are typically supported by a frame 16. The drive mechanism is preferably a motor 15. The output end of the motor 15 is connected with a transmission shaft 6 through a rigid coupling 13, the transmission shaft 6 penetrates through the center of the rotary drum 3 and is fixed with the rotary drum 3, and when the motor 15 runs, the rotary drum 3 is driven to rotate. The static cylinder 2 is positioned in a radial matching way through the middle flange 12 and is connected with the motor flange 14, the static cylinder 2 is installed on the machine frame 16 through the machine frame saddle 17, and all the parts can be locked and fixed through the screws 11 in the locking and installing process.
The center of the front end of the static cylinder 2 is provided with a center feeding hole 1, and the center of the rear end is provided with an eccentric discharging hole 8 below. The quiet section of thick bamboo 2 for cylindrical and quiet 2 inner walls of a section of thick bamboo on the equidistance distribute have decide tooth 4, decide tooth 4 and decide and have between the tooth 4 and decide regional 9. The rotary drum 3 is also cylindrical, moving teeth 5 are distributed on the outer wall of the rotary drum 3 at equal intervals, and moving teeth 10 are arranged between the moving teeth 5 and the moving teeth 5. The fixed inter-tooth region 9 and the moving inter-tooth region 10 form the axial inter-tooth region 7. The fixed teeth 4 and the movable teeth 5 have gaps therebetween, and the gaps form shearing areas. The fixed teeth 4 and the movable teeth 5 can be formed by milling cutter processing, and the processing cost is low.
The fixed teeth 4 are spirally arranged on the inner wall of the static cylinder 2, the fixed teeth 4 and the movable teeth 5 are in the same arrangement rule, and when the fixed teeth 4 and the movable teeth 5 move relatively, a helicoid which cuts and cavitates the material at the central feeding hole 1 through a cutting area and conveys the material to the eccentric discharging hole 8 is formed. In the embodiment shown in fig. 3, the ratio of the number of teeth of the fixed teeth 4 to the number of teeth of the moving teeth 5 is preferably 1.2.
In practical design, the helicoid can be set to be axially spiral relative to the static cylinder 2, as shown in fig. 8, the fixed teeth 4 are axially and spirally arranged on the inner wall of the static cylinder 2 relative to the static cylinder 2, that is, a plurality of circles of fixed teeth 4 are arranged on the inner wall of the static cylinder 2 at equal intervals along the axial direction of the static cylinder 2, a plane formed by each circle of fixed teeth 4 is parallel to the radial plane of the static cylinder 2, and a spiral angle α is formed between each circle of fixed teeth 4 along the circumferential direction of the static cylinder 2 in a rotating manner. The angle range of the helical angle alpha is-30 degrees.
In the practical design, the spiral surface can be set to be a radial spiral relative to the static cylinder 2, as shown in fig. 9, the fixed teeth 4 are spirally arranged on the inner wall of the static cylinder 2 relative to the radial plane of the static cylinder 2, that is, a plurality of fixed teeth 4 are arranged on the inner wall of the static cylinder 2 at equal intervals along the axial direction of the static cylinder 2, the straight line formed by each fixed tooth 4 is parallel to the axial direction of the static cylinder 2, each fixed tooth 4 sequentially rotates along the axial direction of the static cylinder 2 to have a helix angle β, and the angle range of the helix angle β is-30 ° to-30 °.
The tooth cylinder group static cylinder 2 and the shearing cavitation of the rotation mainly used material, the cavitation process adopts the mutually matched fixed and rotary cylinders 3 to realize, the fixed and rotary cylinders 3 are used in pairs, the coaxial installation is realized, the fixed and movable teeth 5 are installed face to face, the material flow direction is the center feeding, and the material is discharged by the bottom eccentric discharge port 8 through the cavitation between the static and movable cylinders.
The working process of the invention is as follows: after the liquid flow flows into the cavitator from the inlet, the liquid flow is subjected to throttling shearing action between the movable teeth and the fixed teeth 4, a huge pressure drop is generated in a local area, so that a vacuum low-pressure area is generated between the teeth, and then gas nuclei in the liquid are sucked by a coherent vortex structure with lower vortex core pressure, and a high amount of pure vapor-phase cavitation bubbles are generated. The movable teeth 4 with the spiral structure can make the liquid automatically flow into the axial teeth and continue to be subjected to the next layer of shear cavitation. In the axial and circumferential interdental spaces, the liquid is released, the pressure recovers, the vacuole collapses, and a huge jet impact force is generated locally, so that the strong combination between substances can be broken, and even the carbon bond on the main chain of the macromolecule can be broken or the cell wall of the microorganism can be damaged.
The process of the invention for realizing the cavitation effect is as follows: the material inlet is arranged at the front end of the static cylinder 2, namely the central feeding hole 1, the material outlet is arranged at the rear end of the static cylinder 2, namely the eccentric discharging hole 8, and the positions of the inlet and the outlet can be interchanged as required in practical application. The material flows into the gap between the fixed teeth 4 and the movable teeth 5 and is subjected to the throttling shearing action of the two teeth, and due to the high-speed rotation of the rotary drum 3, the space between the movable teeth 5 is in a low-pressure state, so that a large amount of cavitation bubbles grow in a low-pressure space, when liquid flows out of the movable teeth 5, the liquid flows into the gap between the axial teeth, the fluid is released, the pressure is recovered, the cavitation bubbles are collapsed, the material automatically enters the cavitation cavity to cavitate layer by layer due to the spiral structure of the fixed teeth 5, and finally the material is discharged from the discharge hole.
In the actual model selection process, a model selection test experiment can be carried out on the spiral angle alpha, the spiral lift angle beta, the tooth crest wedge angle gamma, the tooth number and the thickness ratio of the movable tooth 5 and the fixed tooth 4 through a simulation experiment, and the following optimal model selection values can be obtained through simulation:
1. the angle of the helical angle alpha is 20 degrees, the cavitation rate is increased along with the increase of the angle, but the material suction speed is increased when the angle is too large, most of the material is discharged without cavitation, and therefore the angle is limited to 20 degrees.
2. The helix angle beta is 10 degrees, under the condition of the same tooth circumferential clearance, the larger the angle is, the smaller the tooth number is, the shearing area can be reduced, and the smaller the angle is, the suction speed can be increased.
3. The tooth crest wedge angle gamma of the trapezoidal tooth with the tooth crest wedge angle gamma is 20 degrees, so that the generation of cavitation bubbles is facilitated, the cavitation efficiency is improved, but the angle is too large, or the shearing action of the tooth on fluid is reduced, and the cavitation rate is reduced.
4. The ratio of the number of fixed teeth 4 in the circumferential direction of the fixed cylinder 2 to the number of movable teeth 5 in the circumferential direction of the rotary cylinder 3 is 1.2. The circumferential diameter of the inner circular surface of the static cylinder 2 is larger than that of the outer circular surface of the rotary cylinder 3, so that the circumferential clearance of the fixed teeth 4 is limited to be the same as that of the movable teeth 5, the enough shearing force can be ensured, and enough space for cavitation bubbles to develop and collapse is reserved.
5. The ratio of the circumferential thickness of the fixed teeth 4 to the tooth height is 1, and the ratio of the circumferential thickness of the movable teeth 5 to the tooth height is 1. The proportion of 1 can meet the strength requirement of the needed teeth and the cavitation requirement in the cavitator, and is an optimal value and can float up and down according to the requirement.
6. The ratio of the axial thickness to the circumferential thickness of the fixed teeth 4 is 1, and the ratio of the axial thickness to the circumferential thickness of the movable teeth 5 is 1. The square teeth have the highest cavitation rate, but the parameters can be changed according to specific processing conditions or special requirements.
7. The comprehensive cost and cavitation efficiency are considered, the axial distance of the fixed teeth 4 is 0.8 time of the axial thickness of the fixed teeth 4, and the axial distance of the movable teeth 5 is 0.8 time of the axial thickness of the movable teeth 5.
8. The tooth height ratio of the fixed teeth 4 to the movable teeth 5 is 0.8. Simulation results show that a part of liquid close to the wall surface between the fixed teeth 4 can directly slide into the next gear ring without cavitation, the tooth height of the fixed teeth 4 is reduced to avoid the phenomenon, the cavitation efficiency is reduced at the same time, two influence factors are combined, and the tooth height ratio of the fixed teeth 4 to the movable teeth 5 is 0.8, which is the optimal solution.
9. The circumferential distance of the fixed teeth 4 is 1 time of the circumferential tooth thickness of the fixed teeth 4, and the circumferential distance of the movable teeth 5 is 1 time of the circumferential tooth thickness of the movable teeth 5. The circumferential clearance space of the fixed teeth 4 and the movable teeth 5 is an important area for cavitation initiation and collapse, the clearance is too small, cavitation bubbles are not fully developed, the clearance is too large, the shearing area is insufficient, and the efficiency is reduced.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (11)
1. The utility model provides a rotatory toothed drum formula hydrodynamic cavitation ware, includes actuating mechanism, quiet section of thick bamboo (2) and rotary drum (3), rotary drum (3) set up in quiet section of thick bamboo (2), the actuating mechanism output is connected with rotary drum (3) transmission, its characterized in that: the axial line of the static cylinder (2) is coincided with that of the rotary cylinder (3), the central position of the front end of the static cylinder (2) is provided with a central feeding hole (1), the central position of the rear end is provided with an eccentric discharging hole (8), the static cylinder (2) is cylindrical, fixed teeth (4) are equidistantly distributed on the inner wall of the static cylinder (2), the rotary cylinder (3) is also cylindrical, movable teeth (5) are equidistantly distributed on the outer wall of the rotary cylinder (3), a gap is formed between the fixed teeth (4) and the movable teeth (5), and the gap forms a shearing area; decide tooth (4) arrange on quiet section of thick bamboo (2) inner wall for quiet section of thick bamboo (2) axial spiral, decide tooth (4) and move tooth (5) rule of arranging unanimously, decide tooth (4) and move tooth (5) relative motion time formation through the regional shearing cavitation of shearing of the material of center feed inlet (1) and transport the helicoid to eccentric discharge gate (8).
2. A rotary-gear-bucket hydrodynamic cavitator as claimed in claim 1, wherein: the fixed teeth (4) are axially and spirally arranged on the inner wall of the static cylinder (2) relative to the static cylinder (2), namely a plurality of circles of fixed teeth (4) are axially and equidistantly arranged on the inner wall of the static cylinder (2) along the static cylinder (2), a plane formed by each circle of fixed teeth (4) is parallel to the radial plane of the static cylinder (2), a spiral angle alpha is formed between each circle of fixed teeth (4) in a sequential rotation mode along the circumferential direction of the static cylinder (2) along the position direction from the central feeding hole (1) to the eccentric discharging hole (8), and the angle range of the spiral angle alpha is-30 degrees to-30 degrees.
3. The utility model provides a rotatory toothed drum formula hydrodynamic cavitation ware, includes actuating mechanism, quiet section of thick bamboo (2) and rotary drum (3), rotary drum (3) set up in quiet section of thick bamboo (2), the actuating mechanism output is connected with rotary drum (3) transmission, its characterized in that: the axial line of the static cylinder (2) is coincided with that of the rotary cylinder (3), the central position of the front end of the static cylinder (2) is provided with a central feeding hole (1), the central position of the rear end is provided with an eccentric discharging hole (8), the static cylinder (2) is cylindrical, fixed teeth (4) are equidistantly distributed on the inner wall of the static cylinder (2), the rotary cylinder (3) is also cylindrical, movable teeth (5) are equidistantly distributed on the outer wall of the rotary cylinder (3), a gap is formed between the fixed teeth (4) and the movable teeth (5), and the gap forms a shearing area; decide tooth (4) and be the spiral for quiet section of thick bamboo (2) radial plane and arrange on quiet section of thick bamboo (2) inner wall, decide tooth (4) and move tooth (5) rule of arranging unanimously, decide tooth (4) and move tooth (5) relative motion time formation and pass through the helicoid of shearing regional shearing cavitation and conveying to eccentric discharge gate (8) with the material of central feed inlet (1).
4. A rotary-gear-bucket hydrodynamic cavitator as claimed in claim 3, wherein: the fixed teeth (4) are spirally arranged on the inner wall of the static cylinder (2) relative to the radial plane of the static cylinder (2), namely, a plurality of fixed teeth (4) are axially and equidistantly arranged on the inner wall of the static cylinder (2) along the static cylinder (2), a straight line formed by each fixed tooth (4) is axially parallel to the static cylinder (2), each fixed tooth (4) sequentially rotates along the axial direction of the static cylinder (2) to form a helix angle beta, and the angle range of the helix angle beta is-30 degrees.
5. A rotary-toothed-drum hydrodynamic cavitator as claimed in claim 1 or 3, wherein: the tooth shapes of the fixed tooth (4) and the movable tooth (5) are fan-shaped teeth with equal central angles, rectangular teeth with equal tooth widths, cylindrical teeth or trapezoidal teeth with tooth crest wedge angles gamma; the angle range of the addendum wedge angle gamma of the trapezoidal tooth with the addendum wedge angle gamma is-30 degrees to-30 degrees.
6. A rotary-toothed-drum hydrodynamic cavitator as claimed in claim 1 or 3, wherein: the ratio of the number of the fixed teeth (4) in the circumferential direction of the static cylinder (2) to the number of the movable teeth (5) in the circumferential direction of the rotary cylinder (3) is 1-1.5.
7. A rotary-toothed-drum hydrodynamic cavitator as claimed in claim 1 or 3, wherein: the ratio of the circumferential thickness to the tooth height of the fixed teeth (4) is 0.5-1.5, and the ratio of the circumferential thickness to the tooth height of the movable teeth (5) is 0.5-1.5.
8. A rotary-toothed-drum hydrodynamic cavitator as claimed in claim 1 or 3, wherein: the ratio of the axial thickness to the circumferential thickness of the fixed teeth (4) is 0.8-1.2, and the ratio of the axial thickness to the circumferential thickness of the movable teeth (5) is 0.8-1.2.
9. A rotary-toothed-drum hydrodynamic cavitator as claimed in claim 1 or 3, wherein: the axial distance of the fixed teeth (4) is 0.25-2 times of the axial thickness of the fixed teeth (4), and the axial distance of the movable teeth (5) is 0.25-2 times of the axial thickness of the movable teeth (5).
10. A rotary-toothed-drum hydrodynamic cavitator as claimed in claim 1 or 3, wherein: the tooth height ratio of the fixed teeth (4) to the movable teeth (5) is 0.5-1.
11. A rotary-toothed-drum hydrodynamic cavitator as claimed in claim 1 or 3, wherein: the circumferential interval of the fixed teeth (4) is 0.7-1.3 times of the circumferential tooth thickness of the fixed teeth (4), and the circumferential interval of the movable teeth (5) is 0.7-1.3 times of the circumferential tooth thickness of the movable teeth (5).
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| CN113333191B (en) * | 2021-05-31 | 2022-07-05 | 武汉大学 | Rotating shearing cavitation nozzle |
| CN114029015B (en) * | 2021-11-12 | 2023-03-17 | 山东建筑大学 | Rotor-radial gap type hydrodynamic cavitation reactor |
| CN113998770B (en) * | 2021-12-30 | 2022-04-08 | 山东奥美环境股份有限公司 | Cavitation oxidation device |
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