Efficient dynamic adjustable feedback cavitation stirring method and device

Abstract

The invention discloses an efficient dynamic adjustable feedback cavitation stirring method and device, each structure of a propeller comprises a first step-shaped boss, a hinged support, a second step-shaped boss and a blade which are sequentially connected from inside to outside from the outer wall of a transmission shaft, and the second step-shaped boss can rotate on a vertical plane relative to the first step-shaped boss; the outer end of the second step-shaped boss is connected with a paddle through a cylindrical shaft and a second bearing, the second step-shaped boss is hinged to a pitching adjusting disc through a third hinge support and a first connecting rod, and the edge of the pitching adjusting disc is matched with an annular groove of an inner circular ring of a pitching adjusting support through a first spherical ball. The blades are connected with the upper end of a second connecting rod through a pin shaft, the lower end of the second connecting rod is connected with an attack angle adjusting disc through a fourth hinge support and another pin shaft, the attack angle adjusting disc is sleeved on the transmission shaft in an empty mode, and the edge of the attack angle adjusting disc is matched with an annular groove of an inner circular ring of an attack angle adjusting support through a second spherical ball to change the attack angle and the pitching angle of the propeller. The stirring effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cavitation, and in particular is a device which stirs materials by using the cavitation technology principle with the aid of multiple sensor detection. Background Art

[0002] With the continuous development of social production and life and the continuous advancement of science and technology, people's demand for fast, efficient and low-energy mixing processes is increasing. In industrial production, the utilization rate of mixing is constantly increasing due to the need to improve the homogeneity of materials, suspend solid particles and other production needs. The old mixing technology mostly uses traditional mechanical structures to mix materials, which has low efficiency and cannot be adjusted according to the real-time state and mixing intensity of mixing, which wastes energy and reduces production efficiency. Therefore, in production and life, there is an urgent need for an efficient, dynamically adjustable cavitation mixing device and method that can efficiently handle material mixing problems, dynamically adjust according to the real-time state of mixing, and is suitable for various mixing scenarios.

[0003] Cavitation mixing technology uses the cavitation effect to process materials. This technology can enhance mixing efficiency and utilize the bubbles generated to collapse rapidly when the pressure drops, thereby generating a strong impact and a local high-pressure environment. A large number of tiny bubbles are generated inside the material that needs to be stirred. The impact generated by the large amount of bubbles collapse has a huge effect on the material, allowing it to dissolve and split rapidly, and improve homogenization in the mixed liquid. The use of the cavitation effect makes the cavitation mixing technology itself more efficient and faster than traditional mechanical stirring. For special materials, it can even directly destroy the macromolecular structure and reduce the difficulty of material stirring. Its low energy consumption and strong applicability make cavitation mixing unique and significant advantages in different material processing scenarios. Cavitation mixing provides an efficient and environmentally friendly solution for stirring and mixing materials.

[0004] At present, a large number of cavitation mixing methods have been used in industrial production and life, which have the advantages of good cavitation effect and high cavitation efficiency. However, the existing cavitation mixing technology still has a series of problems such as the inability to dynamically adjust the cavitation area and the inability to significantly dynamically adjust the cavitation intensity. For example, a new type of concrete mixer disclosed in the document with patent application number CN202323630489.4 improves the efficiency and quality of mixing by adjusting the propeller structure, but it aims to achieve an adjustable propeller working position through the structural design of the guide rail in order to facilitate the cleaning and maintenance of the mixing device. It has limited effect on the cavitation effect and cannot dynamically adjust the cavitation area and cavitation intensity. Summary of the invention

[0005] The purpose of the present invention is to address a series of problems such as the inability of current cavitation stirring methods to dynamically adjust their cavitation area and cavitation intensity, improve the effectiveness and efficiency of their applications, and propose a new type of high-efficiency dynamically adjustable feedback cavitation stirring device and method. A special structure is used to change the relative position of the propeller, adjust the pitch angle and angle of attack data of the propeller, so that the position, scale and intensity of the cavitation effect change to adapt to different stirring requirements.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is a highly efficient dynamically adjustable feedback cavitation stirring device: comprising a water tank, a water pump and a cavitation stirrer connected in sequence, the cavitation stirrer having a stirring chamber formed by sealingly connecting an upper cylindrical shell and a lower cylindrical shell, a rubber barrier layer being provided on the upper end surface of the upper cylindrical shell, a vertical No. 1 motor being provided just above the outer surface of the upper cylindrical shell, and a vertical No. 2 motor being provided just below the outer surface of the lower cylindrical shell, the No. 1 and No. 2 motors each extending a transmission shaft through the middle through hole of the corresponding rubber barrier layer and then extending into the stirring chamber and each connected a propeller; a material port and a water inlet for connecting a water pump are opened on the upper rubber partition, and a material outlet is opened on the lower rubber partition; the motor housings of the No. 1 and No. 2 motors are each fixedly connected to a horizontal upper adjustment bracket and a lower adjustment bracket, and the horizontal ends of the upper and lower adjustment brackets are each connected to a vertical guide rail, and the upper and lower pitch adjustment brackets and the upper and lower angle of attack adjustment brackets are also connected between the two vertical guide rails, and all the adjustment brackets can move up and down along the two guide rails; the upper and lower pitch adjustment brackets and the upper and lower angle of attack adjustment brackets all have upper rings and inner rings, The upper ring is outside the stirring chamber, and the edge of the upper ring extends downward through the middle thin rod into the stirring chamber to connect with the inner ring. An annular groove is opened on the inner wall of each inner ring; the propeller is a three-piece structure, and each piece of the structure includes a first stepped boss, a hinge support, a second stepped boss and a blade connected from the outer wall of the transmission shaft from the inside to the outside in sequence. The hinge support has a hole that matches the pin shaft. The second stepped boss can rotate around the pin shaft relative to the first stepped boss on a vertical plane. The outer end of the second stepped boss is connected to the blade through the cylindrical shaft and the second bearing; the second stepped boss The pitch adjustment disc is hinged through the No. 3 hinge support and the No. 1 connecting rod, and the pitch adjustment disc is loosely mounted on the transmission shaft and the edge is matched with the annular groove of the inner ring of the corresponding pitch adjustment bracket through the No. 1 spherical ball; the blade is connected to the upper end of the No. 2 connecting rod through a pin shaft, and the lower end of the No. 2 connecting rod is connected to the angle of attack adjustment disc through the No. 4 hinge support and another pin shaft. The connection between the No. 2 connecting rod and the blade is not in the vertical middle of the blade but eccentric, and the angle of attack adjustment disc is loosely mounted on the transmission shaft and the edge is matched with the annular groove of the inner ring of the angle of attack adjustment bracket through the No. 2 spherical ball.

[0007] The technical solution adopted by the stirring method of the high-efficiency dynamically adjustable feedback cavitation stirring device of the present invention comprises the following steps:

[0008] Step 1): Turn on the water pump, the water in the water tank enters the mixing chamber, add materials from the material port, turn on the No. 1 and No. 2 motors, drive the first stepped boss, the second stepped boss, the No. 1 connecting rod, the pitch adjustment disc, the No. 2 connecting rod, the angle of attack adjustment disc and the blades to rotate simultaneously to mix the materials;

[0009] Step 2): The upper and lower adjustment brackets, the upper and lower pitch adjustment brackets, and the upper and lower angle of attack adjustment brackets move up and down at the same speed at the same time, so as to realize the up and down movement of the No. 1 and No. 2 motors and change the up and down positions of the propellers;

[0010] Step 3): Keep the upper and lower adjustment brackets and the upper and lower angle of attack adjustment brackets stationary, and move the upper and lower pitch adjustment brackets up and down to push the inner ring of the pitch adjustment bracket to move, and transmit the transmission through the No. 1 spherical ball and the pitch adjustment disc, and the pitch adjustment disc pushes the second stepped boss and the blade to rotate through the No. 1 connecting rod, and the second stepped boss and the blade pitch to change the pitch state of the propeller;

[0011] Step 4): Keep the upper and lower adjustment brackets and the upper and lower pitch adjustment brackets stationary, and move the upper and lower angle of attack adjustment brackets up and down to push the inner ring of the angle of attack adjustment bracket to move. The No. 2 spherical ball and the angle of attack adjustment disc are connected and transmitted, and the No. 2 connecting rod pushes the blades to rotate to change the angle of attack of the upper propeller.

[0012] Compared with the prior art, the present invention has the following outstanding beneficial effects:

[0013] (1) The present invention adopts a propeller structure with a symmetrical layout up and down, which can produce a cavitation effect scale in the center of the cavitation agitator that a single propeller cannot produce, thereby improving the efficiency of stirring and energy saving. The colliding water flow can produce a huge cavitation effect and produce a strong physical effect locally, processing and homogenizing the materials that need to be homogenized in the mixture. This method of colliding water flow ensures the scale and high efficiency of the cavitation effect, thereby improving the effect and efficiency of stirring.

[0014] (2) The present invention achieves the vertical movement of the propeller in the cavitation agitator through various structures such as a rubber interlayer structure, a guide rail structure for realizing relative movement of the motor position, a gear rack structure, etc., thereby changing the cavitation effect position and the control intensity, thereby meeting the stirring needs of different positions, and can be continuously adjusted according to the different stages of stirring progress, thereby improving the stirring efficiency and saving energy.

[0015] (3) The present invention achieves the change of the propeller pitch angle by designing a special structure of the propeller. The change of the pitch angle can significantly change the scale of the cavitation effect. Similarly, the change of the pitch angle is also conducive to avoiding possible collisions when the propeller changes its vertical position up and down. Propellers with different pitch angles have different changes in liquid speed and range. Using the optimal pitch angle can maximize the effect of the cavitation effect.

[0016] (4) The present invention can change the angle of attack of the propeller through the design of a special propeller structure, thereby changing the direction and acceleration intensity of the liquid, which is beneficial to the control of the intensity of the cavitation effect during stirring and ensures the efficiency of stirring. The intensity of the cavitation effect generated during stirring can be changed during the rotation process to adapt to different homogenization requirements, thereby improving the stirring effect.

[0017] (5) The present invention realizes adaptive processing under different requirements and actual working conditions by specially designing different positions of the inner wall of the cavitation agitator and combining adjustable cavitation effect scale and position, thereby improving the stirring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] Figure 1 It is a schematic diagram of the overall structure of a high-efficiency dynamically adjustable feedback cavitation stirring device of the present invention;

[0020] Figure 2 yes Figure 1 Only the structural enlarged schematic diagram of the upper and lower adjustment structure in the cavitation agitator is retained, and different upper and lower working positions are shown, and the positions of the installation openings of the pitch adjustment bracket and the angle of attack adjustment bracket are pointed out when the pitch adjustment bracket and the angle of attack adjustment bracket are omitted;

[0021] Figure 3 yes Figure 2 A is a schematic diagram of the enlarged local structure;

[0022] Figure 4 yes Figure 1 An enlarged schematic diagram of the three-dimensional structure of the middle upper pitch adjustment bracket;

[0023] Figure 5 yes Figure 1 Only the enlarged schematic diagram of the pitch adjustment structure in the upper part of the cavitation agitator is retained, and different pitch working angles are indicated;

[0024] Figure 6 yes Figure 5 A schematic cross-sectional view of the enlarged local structure of B;

[0025] Figure 7 yes Figure 6 A top view of the assembly structure of the first and second stepped bosses and the hinge support;

[0026] Figure 8 yes Figure 1 The enlarged schematic diagram of the structure in which only the angle of attack adjustment structure in the upper part of the cavitation agitator is retained;

[0027] Fig. 9 yes Figure 8 A magnified schematic diagram of the local structure of C;

[0028] Fig.10 yes Figure 1 A magnified 3D schematic diagram of the protruding structure inside the hollowing agitator.

[0029] Explanation of the reference numerals: 1. water pump; 2. flow meter; 3. controller; 4. guide rail; 5. upper adjustment bracket; 6. No. 1 motor; 7. rubber barrier; 8. cover; 9. upper adjustment motor and its gear; 10. upper pitch adjustment bracket; 11. upper pitch adjustment motor and its gear; 12. upper angle of attack adjustment bracket; 13. upper angle of attack adjustment motor and its gear; 14. upper cylindrical shell; 15. lower cylindrical shell; 16. lower angle of attack adjustment bracket; 17. lower pitch adjustment bracket; 18. lower adjustment bracket; 19. No. 2 motor; 20. lower adjustment motor and its gear; 21. lower pitch adjustment motor and its gear; 22. lower angle of attack adjustment motor and its gear; 23. outlet valve; 24. first stepped boss; 25. second stepped boss; 26. paddle; 27. water inlet valve; 28. torque sensor; 29. ​​water tank; 30. transmission shaft ; 31. No. 1 bearing; 32. Bushing; 33. Bearing seat; 34. No. 1 hinge support; 35. No. 2 hinge support; 36. No. 3 fixed hinge support; 37. No. 1 connecting rod; 38. Upper pitch adjustment disc; 39. No. 1 spherical ball; 40. Inner ring of pitch adjustment bracket; 41. No. 4 hinge support; 42. Steel wire; 43. No. 2 bearing; 44. Cylindrical shaft; 45. No. 5 hinge support; 46. No. 2 connecting rod; 47 . Pin shaft; 48. Inner ring of angle of attack adjustment bracket; 49. No. 2 spherical ball; 50. Upper angle of attack adjustment disc; 51. Protruding position of thicker inner wall; 52. Pressure sensor; 53. Miniaturized and corrugated protrusions; 54. Vibration sensor; 55. Mounting groove; 56. Upper ring; 58. Middle thin rod; 59. Pitch adjustment bracket mounting opening; 60. Angle of attack adjustment bracket mounting opening; 62. Material valve.

[0030] Specific implementation method

[0031] like Figure 1As shown, a highly efficient dynamically adjustable feedback cavitation stirring device of the present invention comprises a water tank 29, a water pump 1, a flow meter 2, a controller 3 and a cavitation stirrer. The outlet of the water tank 29 is connected to the inlet of the water pump 1 by a water pipe, the outlet of the water pump 1 is connected to the cavitation stirrer via the flow meter 2, the water pump 1 and the flow meter 2 are simultaneously connected to the controller 3 via a data circuit, the flow meter 2 detects the flow in the water pipe, and transmits the detected data to the controller 3, and the controller 3 controls the start and stop of the water pump 1, and when the water pump 1 is working, the water in the water tank 29 enters the cavitation stirrer via the water pump 1 and the flow meter 2 in sequence.

[0032] Recombination Figure 2 The cavitation agitator structure shown in the figure comprises an upper cylindrical shell 14 and a lower cylindrical shell 15, which are sealed and connected up and down to form a stirring chamber. The upper cylindrical shell 14 and the lower cylindrical shell 15 have the same structure and are symmetrical up and down. The two are fixedly installed with bolts and nuts to ensure their airtightness.

[0033] Ear-shaped structures protrude from the edges of the upper end surface of the upper cylindrical shell 14 and the lower end surface of the lower cylindrical shell 15, respectively. Holes are punched in the ear-shaped structures, and the holes are used to fix a cover 8 and a rubber interlayer 7. There are two upper and lower covers 8 and two upper and lower rubber interlayers 7, and the upper and lower covers 8 have the same structure, and the upper and lower rubber interlayers 7 have the same structure. The upper and lower covers 8 are both annular parts, and the two annular covers 8 are respectively installed on the upper end surface of the upper cylindrical shell 14 and the lower end surface of the lower cylindrical shell 15 in a one-to-one correspondence. The rubber interlayer 7 is disc-shaped, and its edge is installed between the upper cover 8 and the upper cylindrical shell 14 and between the lower cover 8 and the lower cylindrical shell 15. There are many wrinkles on the disc surface of each rubber interlayer 7. A No. 1 motor 6 is arranged just above the outer surface of the upper cylindrical shell 14, and a No. 2 motor 19 is arranged just below the outer surface of the lower cylindrical shell 15. The No. 1 motor 6 and the No. 2 motor 19 are arranged vertically, and a transmission shaft 30 extending from each of them passes through the middle through hole of the corresponding rubber interlayer 7 and then extends into the inside of the stirring chamber. The two transmission shafts 30 are fixedly and sealedly connected to the corresponding rubber interlayer 7. A propeller is connected to each end of the transmission shaft 30 inside the upper cylindrical shell 14 and the lower cylindrical shell 15, which are an upper propeller and a lower propeller respectively. The upper propeller and the lower propeller have the same structure and are symmetrical up and down.

[0034] Although the upper and lower rubber interlayers 7 have the same structure, a water inlet valve and a material port are provided on the upper rubber interlayer 7. A water inlet valve 27 is installed at the water inlet, and the water inlet valve 27 is connected to the flow meter 2, the water pump 1 and the water tank 29 through a water pipe. A material valve 62 is installed at the material port. A material outlet is provided on the lower rubber interlayer 7, and an outlet valve 23 is installed at the outlet. The water inlet valve 27, the material valve 62 and the outlet valve 23 are all connected to the controller 3, and their opening and closing are controlled by the controller 3. At the same time, a pitch adjustment bracket installation opening 59 and an angle of attack adjustment bracket installation opening 60 are provided on the upper and lower rubber interlayers 7, so that the upper and lower pitch adjustment brackets 10, 17 and the upper and lower angle of attack adjustment brackets 12, 16 can pass through the rubber interlayer 7 and extend into the stirring chamber. There are many wrinkles around the pitch adjustment bracket installation opening 59 and the angle of attack adjustment bracket installation opening 60 on the rubber insulation layer 7, ensuring that there is excess material for the installation between the adjustment bracket and the rubber insulation layer 7 while ensuring the sealing.

[0035] like Figure 3 , a middle through hole and a large number of folds are opened in the center of the rubber interlayer 7, and a circle of several small round holes are distributed in an array on the outside of the middle through hole. The outer sealing sleeve of the transmission shaft 30 has a No. 1 bearing 31 and a sleeve 32. The outer sleeve of the No. 1 bearing 31 is covered with a bearing seat 33, and the bearing seat 33 is fixedly connected to the No. 1 bearing 31. The sleeve 32 is provided with a circle of several protruding small cylinders on the surface facing the rubber interlayer 7. The small cylinders cooperate with the small round holes on the rubber interlayer 7, so that the sleeve 32 is fixedly connected to the rubber interlayer 7. When the transmission shaft 30 rotates, the sleeve 32 does not rotate. The No. 1 bearing 31 adopts a deep groove ball bearing to ensure that it can withstand the impact of axial and radial forces under high rotation speed.

[0036] like Figure 1-2 As shown, the motor housings of motor No. 1 6 and motor No. 2 19 are each fixedly connected to a corresponding horizontal adjustment bracket, that is, the motor housing of motor No. 1 6 is fixedly connected to the upper adjustment bracket 5, and the motor housing of motor No. 2 19 is fixedly connected to the lower adjustment bracket 18. The upper adjustment bracket 5 and the lower adjustment bracket 18 have the same structure and are parallel up and down.

[0037] A vertical guide rail 4 is provided at each of the horizontal ends of the upper adjustment bracket 5 and the lower adjustment bracket 18. The two guide rails 4 have the same structure. The horizontal ends of the upper adjustment bracket 5 and the lower adjustment bracket 18 are respectively connected to the guide rails 4 on the corresponding side, and can move up and down along the two guide rails 4. Both guide rails 4 are provided with vertical racks in the up and down directions. One end of the upper adjustment bracket 5 is provided with an upper adjustment motor and its gear 9, and one end of the lower adjustment bracket 18 is provided with a lower adjustment motor and gear 20. The upper adjustment bracket 5 and the lower adjustment bracket 18 move up and down along the guide rail 4 driven by their respective motors and gears. This is a conventional motor-driven gear rack motion mechanism, so Figure 1When the upper adjustment bracket 5 and the lower adjustment bracket 18 move up and down along the guide rail 4, the No. 1 motor 6 and the No. 2 motor 19 are driven to move up and down, thereby driving the upper propeller and the lower propeller inside the stirring chamber to move up and down, changing the upper and lower positions of the upper propeller and the lower propeller inside the stirring chamber.

[0038] An upper pitch adjustment bracket 10 and a lower pitch adjustment bracket 17, as well as an upper angle of attack adjustment bracket 12 and a lower angle of attack adjustment bracket 16 are also connected between the two guide rails 4. Both ends of the upper pitch adjustment bracket 10 and the lower pitch adjustment bracket 17 and the upper angle of attack adjustment bracket 12 and the lower angle of attack adjustment bracket 16 are connected to a guide rail 4 on the corresponding side and can move vertically up and down along the two guide rails 4. Among them, the upper pitch adjustment bracket 10 is connected to the upper pitch adjustment motor and gear 11, and moves up and down along the two guide rails 4 under the drive of the upper pitch adjustment motor and gear 11, and the lower pitch adjustment bracket 17 is connected to the lower pitch adjustment motor and gear 21, and moves up and down along the two guide rails 4 under the drive of the lower pitch adjustment motor and gear 21. The upper angle of attack adjustment bracket 12 is connected to the upper angle of attack adjustment motor and gear 13, and moves up and down along the two guide rails 4 driven by the upper angle of attack adjustment motor and gear 13. The lower angle of attack adjustment bracket 16 is connected to the lower angle of attack adjustment motor and gear 22, and moves up and down along the two guide rails 4 driven by the lower angle of attack adjustment motor and gear 22. The upper pitch adjustment bracket 10 and the lower pitch adjustment bracket 17 have the same structure and are symmetrical up and down. The upper angle of attack adjustment bracket 12 and the lower angle of attack adjustment bracket 16 have the same structure and are symmetrical up and down. The principle of their moving up and down along the guide rail 4 is the same as that of the upper adjustment bracket 5 and the lower adjustment bracket 18.

[0039] The upper pitch adjustment bracket 10 and the lower pitch adjustment bracket 17 as well as the upper angle of attack adjustment bracket 12 and the lower angle of attack adjustment bracket 16 have the same structure. The present invention only takes the upper pitch adjustment bracket 10 as an example. Figure 4As shown, it has an upper ring 56 and an inner ring 40 of the pitch adjustment bracket. The upper ring 56 is outside the stirring chamber. The edge of the upper ring 56 extends horizontally to both sides and is provided with a mounting groove 55 for connecting the guide rail 4. The edge of the upper ring 56 also extends downward through four evenly distributed middle thin rods 58 into the inner ring 40 connected to the pitch adjustment bracket inside the stirring chamber. Therefore, the inner ring 40 of the pitch adjustment bracket is located inside the stirring chamber, and the middle thin rods 58 extend downward through the through holes on the rubber interlayer 7 into the stirring chamber. An annular groove is provided on the inner wall of the inner ring 40 for connecting the upper propeller so that the upper propeller can achieve pitch adjustment. Similarly, the lower pitch adjustment bracket 17, which is symmetrical and has the same structure as the upper pitch adjustment bracket 10, is also connected to the lower propeller through its corresponding inner ring 40 of the pitch adjustment bracket so that the lower propeller can achieve pitch adjustment. Similarly, the upper angle of attack adjustment bracket 12 and the lower angle of attack adjustment bracket 16 with similar structures are also respectively connected to the upper and lower propellers through the inner ring 40 of their own pitch adjustment brackets, so that the upper and lower propellers can achieve angle of attack adjustment.

[0040] The upper propeller and the lower propeller have the same structure, are symmetrically arranged up and down, and are both three-piece structures. Figure 5 , 6 , 7, 8, and 9, each piece of structure includes a first stepped boss 24, two hinge supports, a second stepped boss 25, and a blade 26 connected in sequence from the inside to the outside of the outer wall of the transmission shaft 30, wherein the first stepped boss 24 can be a stepped structure extending horizontally from the transmission shaft 30 radially outward, the outer end of which is a thinner end, and the inner end of the second stepped boss 25 is a thicker end, and the outer end of the first stepped boss 24 and the inner end of the second stepped boss 25 are rotatably connected through two hinge supports and a pin shaft, see Figure 7 As shown, two hinge supports are arranged horizontally, namely hinge support No. 1 34 and hinge support No. 2 35. These two hinge supports have holes that can cooperate with the pin shaft, so that the second stepped boss 25 can rotate vertically around the pin shaft relative to the first stepped boss 24, thereby changing the pitch shape of the propeller.

[0041] The second stepped boss 25 is generally in the shape of a rectangular parallelepiped, and the outer end is a thinner end, which is a cylindrical shaft 44. The cylindrical shaft 44 supports and connects the blade 26 through the second bearing 43. Fig. 9 , so that the blade 26 can rotate around the axis of the cylindrical shaft 44 of the second stepped boss 25.

[0042] A protrusion is provided on the upper end surface of the second stepped boss 25, and an upper pitch adjustment disc 38 is hingedly connected thereto through a No. 3 hinge support 36 and a No. 1 connecting rod 37. The upper and lower ends of the No. 1 connecting rod 37 are respectively hingedly connected to the upper pitch adjustment disc 38 and the No. 3 hinge support 36. The upper pitch adjustment disc 38 is a hollow disc, which is sleeved on the transmission shaft 30 with a gap and does not contact the transmission shaft 30. Semicircular grooves are provided on the upper and lower surfaces at the edge of the upper pitch adjustment disc 38 for installing a No. 1 spherical ball 39. The No. 1 spherical ball 39 cooperates with the semicircular groove of the inner ring 40 of the pitch adjustment bracket and can rotate in the inner ring 40 of the pitch adjustment bracket. When the transmission shaft 30 rotates, it drives the first stepped boss 24, the second stepped boss 25, the No. 1 connecting rod 37 and the upper pitch adjustment disc 38 to rotate simultaneously, so that the edge of the upper pitch adjustment disc 38 rotates in the inner ring 40 of the pitch adjustment bracket through the No. 1 spherical ball 39, ensuring that when the transmission shaft 30 rotates at high speed, the upper pitch adjustment bracket 10 can still be used to drive the upper pitch adjustment disc 38 to move up and down, and when the upper pitch adjustment disc 38 moves up and down, it drives the second stepped boss 25 to rotate on the vertical plane around the No. 1 hinge support 34 and the No. 2 hinge support 35.

[0043] See also Figure 4 and Figure 5 When the upper pitch adjustment bracket 10 passes downward through the through hole on the rubber insulation layer 7 and extends into the stirring chamber, there are openings and redundant wrinkled parts on the rubber insulation layer 7. The wrinkled parts are tightly attached to the middle thin rod 58 of the upper pitch adjustment bracket 10 and are fastened by winding with the steel wire 42, so that the upper pitch adjustment bracket 10 drives the rubber insulation layer 7 to move up and down and deform.

[0044] like Figure 8 and Fig. 9The blade 26 as a whole is a traditional propeller structure, which extends from the inside to the outside, first thickening and then gradually thinning, in a shuttle shape. Taking the above propeller as an example, a No. 5 hinge support 45 is provided below the blade 26, and its opening direction is horizontal. The No. 5 hinge support 45 is close to the root of the blade 26, and is connected to the upper end of the No. 2 connecting rod 46 through a pin shaft 47. The lower end side of the No. 2 connecting rod 46 is also connected to the upper angle of attack adjustment disc 50 through the No. 4 hinge support 41 and another pin shaft 47. And the connection between the No. 2 connecting rod 46 and the blade 26 is not in the vertical middle of the blade 26, but is eccentrically connected, so that when the No. 2 connecting rod 46 moves up and down, it can drive the blade 26 to rotate. The upper angle of attack adjustment disc 50 has the same structure as the upper pitch adjustment disc 38, both of which are hollow and are hollowly mounted on the transmission shaft 30. Semicircular grooves are formed on the upper and lower surfaces of the outer edge of the upper angle of attack adjustment disc 50, and a No. 2 spherical ball 49 is installed in the semicircular groove. The upper angle of attack adjustment disc 50 is installed in cooperation with the semicircular groove of the inner ring 48 of the angle of attack adjustment bracket through the No. 2 spherical ball 49, so that the upper angle of attack adjustment disc 50 can rotate around the inner ring 48 of the angle of attack adjustment bracket. When the transmission shaft 30 rotates, the first stepped boss 24, the second stepped boss 25, the No. 2 connecting rod 46 and the upper angle of attack adjustment disc 50 are driven to rotate simultaneously. The No. 2 spherical ball 49 ensures that under the condition of relatively high-speed rotation, the upper angle of attack adjustment bracket 12 can still be used to drive the upper angle of attack adjustment disc 50 to move and transmit it to the blade 26 for rotation. When the upper angle of attack adjustment bracket 12 passes through the rubber insulation layer 7, there are openings and redundant folds on the rubber insulation layer 7. The folds are tightly attached to the middle thin rod 58 of the upper angle of attack adjustment bracket 12 and are fastened by winding with a steel wire 42.

[0045] like Figure 1 and Fig.10As shown, different sensors are installed at different positions in the upper cylindrical shell 14 and the lower cylindrical shell 15 of the cavitation agitator, which are divided into pressure sensors 52, torque sensors 28, vibration sensors 54 and various displacement sensors. Multiple pressure sensors 52 are installed on the miniaturized and corrugated protrusions 53 provided on the inner walls of the upper cylindrical shell 14 and the lower cylindrical shell 15, the torque sensor 28 is installed on the transmission shaft 30, and the vibration sensor 54 is installed on the thicker protruding position 51 of the inner wall of the cylindrical shell of the cavitation agitator; the displacement sensor is installed on the upper adjustment bracket 5 and the lower adjustment bracket 18, the upper pitch adjustment bracket 10 and the lower pitch adjustment bracket 17, and the upper angle of attack adjustment bracket 12 and the lower angle of attack adjustment bracket 16. When stirring materials with larger particles, when only a small part of the pressure sensor 52 on the inner wall has a large pressure, the propeller position and pitch angle can be adjusted to focus on stirring in this area, strengthen the scale of the cavitation effect, and cooperate with the thicker protruding position 51 on the inner wall to quickly crush larger material particles in a smaller area, thereby improving the stirring efficiency. The mixture is provided with different miniaturized and corrugated protrusions 53 at different positions of the inner wall. This design can generate air vortexes in the liquid, increase the contact opportunities between the fluids, and thus improve the mixing uniformity. The surface texture of the inner wall of the agitator has a significant effect on the mixing effect. The surface texture can increase the contact area between the fluid and the agitator wall, thereby improving the mass transfer and heat transfer efficiency. In addition, the appropriate surface texture design can promote the turbulence of the fluid flow, enhance the mixing effect inside the fluid, reduce the formation of dead zones, and make the mixing more uniform and effective.

[0046] See also Figure 1-10 As shown, when the cavitation stirring device of the present invention is working, the controller 3 controls the water pump 1 to open, and draws liquid from the water tank 29 to participate in stirring and mixing. After the water pump 1 draws out water, it is connected to the flow meter 2. The flow meter 2 records the input water volume in real time and feeds back to the controller 3. The controller 3 has the ability to collect data and then calculate, and provides an operation process that can be manually operated. The flow meter 2 is provided with an alarm amount according to the maximum design amount of the material and the cavitation stirrer to avoid abnormal working state of the cavitation stirrer caused by excessive input of liquid and material.

[0047] Flow meter 2 is used to record and monitor the amount of liquid input into the cavitation agitator. The liquid amount has a maximum and a minimum value. The minimum value is to ensure that when the cavitation agitator is working, there is a high enough liquid level so that the upper and lower propellers can produce a strong enough cavitation effect; the maximum value is to ensure a safe amount of liquid within the maximum volume of the cavitation agitator, so that the cavitation agitator has enough space to complete normal work when the cavitation effect occurs.

[0048] Controller 3 sets the maximum and minimum value ranges, and enters the single reset and total count state after each work is completed; if the single count does not meet the maximum and minimum ranges, the device cannot be started to ensure the safety of the working state; when the total count reaches the set maintenance workload, a prompt is issued: "Please perform cleaning maintenance"; and stirring cannot be started.

[0049] The controller 3 receives the speed data returned by the No. 1 motor 6 and the No. 2 motor 19 and the data returned by the torque sensor 27 for calculation, and measures the torque output by the No. 1 motor 6 and the No. 2 motor 19 and the speed of the transmission shaft 30, so as to adjust and set the different working states of the No. 1 motor 6 and the No. 2 motor 19.

[0050] The data returned by the vibration sensor 54 is mainly to ensure that the displacement and cavitation effect scale of the entire cavitation agitator are below the design intensity when the cavitation agitator is in working state, so as to prevent long-term severe vibration caused by various problems such as the non-coaxial upper and lower propellers being misaligned, bearing damage, installation problems, etc. during stirring, thereby destroying the balance of the device and the device itself. At the same time, the vibration sensor 54 can also provide certain data to reflect the cavitation effect scale, intensity and homogeneity of the mixture of the cavitation agitator. After analyzing the data output by the vibration sensor 54, a predictive maintenance plan and performance degradation trend will be formed, so that maintenance can be arranged in advance and the time for repairing the device after unexpected shutdown can be reduced. The present invention realizes adjustable dynamic feedback. The addition of the vibration sensor 54 and the establishment of a mathematical model are conducive to the intelligence and automation of the invention.

[0051] The pressure sensor 52 measures the pressure of the mixture that hits the inner wall, reflecting data such as the degree of homogenization of the mixture. When some mixtures are stirred, it is very important to accurately control the pressure on the inner wall of the stirrer for the quality of the finished product stirred from the mixture. If the pressure sensor 52 detects a sudden drop in pressure, it may be that the materials in the mixture have begun to settle and the stirring is uneven; if the pressure sensor 52 detects a sudden rise in pressure, it may be that the intensity of the cavitation effect is too large and needs to be reduced, and the dynamic adjustable characteristics of the device of the present invention are used for adjustment. For example, during the stirring process after adding a more viscous material, when the pressure sensor 52 receives a locally large pressure, the controller 3 processes and timely adjusts the upper and lower positions of the propeller, thereby performing efficient and special stirring for the local precipitation or high unevenness position. The addition of the pressure sensor 52 greatly improves the automation, intelligence and energy saving of the efficient dynamically adjustable feedback cavitation stirring.

[0052] The displacement sensor monitors the propeller position, pitch angle and angle of attack, and resets and monitors the status after each work is completed. Confirming the status of the upper and lower propellers is conducive to the directional control and adjustment of the cavitation effect, and can avoid propeller collisions caused by incorrect operations, ensuring basic work safety. By monitoring the working status of the propeller in real time, it can ensure that it always operates close to the required cavitation efficiency point to avoid wasting energy; it can help the controller change its working conditions and improve the automatic operation capability of the device.

[0053] The rubber interlayer 7 is not flat, and has a large opening and extra wrinkles in the middle. The corresponding installation position of the middle thin rod 58 extending from the adjustment bracket also has corresponding openings and wrinkles. The wrinkles ensure that when adjusting the propeller position, pitch and angle of attack, the upper adjustment bracket 5 and the lower adjustment bracket 18, the upper pitch adjustment bracket 10 and the lower pitch adjustment bracket 17, the upper angle of attack adjustment bracket 12 and the lower angle of attack adjustment bracket 16 have sufficient range and space for movement, thereby ensuring the sealing of the interior of the cavitation agitator when adjusting the upper and lower positions, pitch conditions and angle of attack of the propeller.

[0054] When a small amount of liquid is added to the cavitation stirring device of the present invention, the liquid level is low, and the controller 3 adjusts the upper and lower positions of the two propellers to fully mix the two propellers and the mixture to be processed. The controller 3 outputs a control signal to rotate the adjustment motors and their gears 9 on the upper adjustment bracket 5 and the lower adjustment bracket 18, and uses the gear rack to make the upper adjustment bracket 5 and the lower adjustment bracket 18 slide along the guide rail 4. The displacement sensor continuously monitors and feeds back data during the process, thereby ensuring the calculation and control of the upper adjustment bracket 5, the lower adjustment bracket 18 and the propeller position. The controller 3 must limit the propeller position to avoid the occurrence of collision events. Different working positions can change the upper and lower positions of the propellers according to different materials, stirring states and concentrated material positions. For larger material blocks, the distance between the two propellers is reduced, and vice versa, the distance between the two propellers is expanded. For concentrated materials or key processing positions, intensive processing is performed to quickly change the homogeneity of the mixture, improve stirring efficiency, and save resources. Different propeller up and down positions can change the scale and position of the cavitation effect. The closer distance between the propellers can compress the range of the cavitation effect and increase the intensity of the cavitation effect between the propellers. For larger material blocks in the mixture, they can be processed locally intensively, and the strong cavitation effect can be used to explode and crush the larger material blocks, thereby completing homogenization. When the material blocks are small, the distance between the two propellers can be appropriately controlled to expand, reduce the intensity of the cavitation effect, and stir the mixture in the entire agitator. The overall stirring is more conducive to the full mixing of the material and water in the mixture, and quickly improves the homogenization degree of the mixture.

[0055] The pitch angle of the cavitation agitator propeller is changed by relative rotation between the first stepped boss 24 and the second stepped boss 25, thereby controlling the position and intensity of the cavitation effect generated when the propeller rotates. Controlling the position of the cavitation effect can focus on stirring the mixing state of the mixture under different conditions, thereby achieving rapid processing of special parts and enhancing their homogeneity. The change in the pitch angle of the propeller will also affect the flow field structure around the propeller, changing the dynamic process of bubble generation, growth and rupture, thereby affecting the degree of influence of cavitation on stirring performance.

[0056] The controller 3 reads the feedback from the sensor and the movement command of the pitch adjustment motor and its gear 11, thereby controlling the pitch adjustment motor and its gear 11 to move to different positions, changing the pitch angle of the propeller. The controller 3 combines the data of the upper and lower positions of the propellers and the data of the pitch angle of the propellers to calculate the extreme position and extreme working state of the propellers, thereby ensuring the safe working distance between the upper and lower propellers. The specific workflow and method of the adjustment structure are: the data returned by each sensor is calculated and evaluated by the controller 3, thereby obtaining the optimal pitch angle of the cavitation stirring device under this state, thereby outputting a movement signal for the motor on the pitch adjustment bracket 10, and controlling and using the displacement sensor to detect the real-time data of the pitch angle. For example, when stirring a relatively viscous mixture, when the vibration sensor 54 receives a relatively strong vibration signal, it is fed back to the controller 3; after processing and calculation, the controller 3 outputs and controls the pitch adjustment motor and its gear 11, and the gears of the pitch adjustment motor and its gear 11 are meshed with the rack of the guide rail 1 to drive the upper pitch adjustment bracket 10 to move up and down as a whole, driving the upper pitch adjustment disc 38 to move up and down, and the upper pitch adjustment disc 38 drives the second stepped boss 25 to rotate around the first stepped boss 24, thereby changing the pitch angle of the blade 26. When a relatively strong vibration signal is received, the pitch angle of the propeller needs to be reduced, and vice versa, when a relatively weak vibration signal is received, the pitch angle can be appropriately increased to improve the stirring efficiency and the intensity of the cavitation effect.

[0057] The blade 26 can rotate around the second stepped boss 25, and the angle of attack of the propeller can be changed while rotating. The change of the angle of attack can change the scale and intensity of the cavitation effect. The change of the angle of attack can change the pressure distribution and flow state on the blade surface, thereby affecting the occurrence of the cavitation effect. A smaller angle of attack can reduce the pressure loss on the blade 26, reduce the local flow velocity, thereby reducing the formation and rupture of bubbles, thereby reducing the cavitation effect. When the vibration sensor 52 and the torque sensor 54 feedback a larger vibration level, the angle of attack of the propeller is appropriately reduced. A larger angle of attack can make bubbles form quickly, accelerate rupture, increase the intensity of the cavitation effect, and make the materials in the mixture quickly homogenized. When homogenization needs to be completed quickly, the angle of attack of the propeller can be appropriately increased.

[0058] The change of the angle of attack requires the control of the angle of attack adjustment motor and its gear 13 on the upper angle of attack adjustment bracket 12 connected to the controller 3, which is also equipped with a displacement sensor to timely feedback the position of the motor and the upper angle of attack adjustment bracket 12. The position of the upper angle of attack adjustment bracket 12 and the upper and lower positions of the propeller cooperate with each other to adjust and determine the angle of attack of the propeller. The specific implementation method of the change of the angle of attack is: using the data of the vibration sensor 54 and the pressure sensor 52 to calculate the cavitation effect intensity of the cavitation stirring device, so as to use the controller 3 to control the angle of attack adjustment motor and its gear 13 on the upper angle of attack adjustment bracket 12 to rotate, the gear rack is meshed to drive the upper angle of attack adjustment bracket 12 to move up and down, and the upper angle of attack adjustment disc 50 moves together, pushing the blade 26 to rotate relative to the second stepped boss 25, thereby changing the propeller angle of attack. When the return data of the vibration sensor 54 and the pressure sensor 52 are very small and stable, the cavitation scale inside the stirrer is small and the intensity is low. At this time, it is necessary to increase the angle of attack to enhance the cavitation effect.

[0059] The specific process of the high-efficiency dynamically adjustable feedback cavitation stirring method of the present invention is:

[0060] The controller 3 controls the water pump 1 to start pumping water, and the pumped water passes through the flow meter 2, thereby controlling and determining the amount of water added to the stirring chamber, calculating the liquid level height for the added water, stopping pumping when the liquid level height in the stirring chamber is appropriate, and closing the water inlet valve 27. The minimum liquid amount and the maximum liquid amount are set in the program of the controller 3 to ensure the normal working state. After the pumping is completed, the material valve 62 is opened to add materials, and the material valve 62 is closed after completion. At the same time, the No. 1 motor 6 and the No. 2 motor 19 are turned on, and the upper and lower transmission shafts 30 rotate at the same time, which in turn drives the first stepped boss 24, the No. 1 hinge support 34, the No. 2 hinge support 35, and the second stepped boss 25 to rotate. The second stepped boss 25 drives the blades 26 and the No. 1 connecting rod 37 to rotate at the same time, stirring the materials in the mixing chamber. At the same time, the No. 1 connecting rod 37 drives the upper pitch adjustment disc 38 to rotate, and the No. 2 connecting rod 46 drives the upper angle of attack adjustment disc 50 to rotate. At this time, the angle of attack and pitch state of the propeller do not change.

[0061] When adjusting the up and down positions of the upper and lower propellers, the controller 3 controls the upper adjustment motor and its gear 9, the lower adjustment motor and its gear 20, the upper pitch adjustment motor and its gear 11, the lower pitch adjustment motor and its gear 21, the upper angle of attack adjustment motor and its gear 13, and the lower angle of attack adjustment motor and its gear 22 to work simultaneously, and controls each adjustment motor to rotate at the same rotation speed and transmission ratio to ensure that the upper adjustment bracket 5 and the lower adjustment bracket 18, the upper pitch adjustment bracket 10 and the lower pitch adjustment bracket 17, the upper angle of attack adjustment bracket 12 and the lower angle of attack adjustment bracket 16 move up and down at the same speed at the same time, and keep relative stillness with each other to avoid changing the angle of attack and pitch state of the propellers while adjusting the up and down positions of the two propellers, thereby realizing the up and down movement of the No. 1 motor 6 and the No. 2 motor 19, driving the transmission shaft 30 and the two propellers thereon to move up and down, so as to realize the change of the up and down positions of the propellers. The change of the up and down positions of the propellers is conducive to full contact between the propellers and the mixture to be stirred. Only when the two propellers are in full contact can they rotate and push the stirred mixture toward the center of the cavitation agitator. The high-speed collision of the liquids at both ends in different directions produces a strong cavitation effect, thereby achieving efficient stirring of the mixture.

[0062] The torque sensor 28 installed on the transmission shaft 30 of the motor can monitor the torque output by the No. 1 motor 6 and the No. 2 motor 19. When other conditions remain unchanged, the change in the homogeneity of the stirred mixture will be accompanied by the change in the torque output by the motor. The change in torque is monitored by the torque sensor 28, and then the data is returned to the controller 3 for data analysis and processing. The pressure sensors 52 distributed at different positions on the inner wall can find the area where the material is concentrated in the mixture by analyzing the pressure data. After finding the area where the material is concentrated, the controller 3 will control each adjustment motor and its gear to rotate, drive the No. 1 motor 6 and the No. 2 motor 19 and the transmission shaft 30 and propeller thereon to move, and keep the upper pitch adjustment bracket 10 and the lower pitch adjustment bracket 17, the upper angle of attack adjustment bracket 12 and the lower angle of attack adjustment bracket 16 connected to the propeller relatively still, so as to ensure that the pitch and angle of attack of the propeller do not change while changing the upper and lower positions of the propeller, and focus on stirring the concentrated area.

[0063] In the area where larger particles of materials are gathered, when the pressure value returned by the pressure sensor 52 is much higher than that of other areas, the propeller can be changed in the up and down position to focus on stirring the area, so that its pressure value changes and tends to be normal. According to the pressure transmitted by the pressure sensor 52 distributed on the inner wall of the cavitation agitator, the homogenization of the material particles can be known. When the material particles are still large and not easy to be crushed in a short time, the controller 3 changes the pitch angle and the angle of attack of the propeller, and increases the angle of attack to increase the intensity of the cavitation effect. Increasing the pitch angle of the propeller compresses the space generated by the cavitation effect, so that in a narrower space, there is a stronger cavitation effect, so that the material particles are quickly crushed. At the same time, the vibration sensor 54 on the inner wall continuously feeds back data to ensure safety in working conditions, prevent the strong vibration of the No. 1 motor 6 and the No. 2 motor 19 and the vibration of the entire cavitation agitator due to the extremely strong cavitation effect, and ensure its balance and normal operation. For example, when the vibration sensor 54 feeds back strong vibration data, the propeller pitch angle can be quickly reduced to avoid too strong vibration from damaging the stirring device. When the feedback from the vibration sensor 54 is weak, the pitch angle may be appropriately increased to increase the intensity of the cavitation effect.

[0064] Taking the above propeller as an example, the way to change the up and down position of the propeller is that the controller 3 outputs a signal to control the upper adjustment motor and its gear 9, the upper pitch adjustment motor and its gear 11, and the upper angle of attack adjustment motor and its gear 13 to rotate simultaneously. See Figure 1, Figure 2 If you want to move the upper propeller downward, you need to rotate the upper adjustment motor and its gear 9, the upper pitch adjustment motor and its gear 11, and the upper angle of attack adjustment motor and its gear 13 clockwise (with Figure 1 The upper adjustment bracket 5, the upper pitch adjustment bracket 10 and the upper angle of attack adjustment bracket 12 move downward relative to the upper cylindrical shell 14. However, during the adjustment process, the upper adjustment bracket 5, the upper pitch adjustment bracket 10 and the upper angle of attack adjustment bracket 12 need to remain relatively still. The upper adjustment bracket 5 moves downward, pushing the No. 1 motor 6 and the transmission shaft 30 to move downward. Figure 3 , the transmission shaft 30 will push the No. 1 bearing 31, the bearing seat 33, and the shaft sleeve 32 to move downward. In the process of moving downward, the middle area of ​​the rubber barrier 7 will be moved downward and deformed. Through such a transmission process, the upper propeller can be changed in the upper and lower positions.

[0065] Taking the upper propeller as an example, the way to change the pitch state of the upper propeller is that the controller 3 outputs a signal to keep the upper adjustment motor and its gear 9 and the upper angle of attack adjustment motor and its gear 13 stationary; that is, keep the upper adjustment bracket 5, the lower adjustment bracket 18, the upper angle of attack adjustment bracket 12, and the lower angle of attack adjustment bracket 16 stationary, and the upper pitch adjustment bracket and its gear 11 rotate to make the upper pitch adjustment bracket 10 and the lower pitch adjustment bracket 17 move up and down. Figure 1 , Figure 5 and Figure 6 If the pitch state of the propeller needs to be adjusted to increase the pitch degree downward, the upper adjustment bracket 5 and the upper angle of attack adjustment bracket 12 need to remain stationary during the pitch state adjustment process. The upper pitch adjustment bracket 10 is moved downward by the rotation of the upper pitch adjustment motor and its gear 11, thereby pushing the inner ring 40 of the pitch adjustment bracket to move downward. The inner ring 40 of the pitch adjustment bracket is connected and driven by the No. 1 spherical ball 39 and the upper pitch adjustment disc 38, pushing the upper pitch adjustment bracket 38 to move downward. Since the first stepped boss 24 remains stationary, the upper pitch adjustment disc 38 pushes the second stepped boss 25 and the blade 26 to rotate downward through the No. 1 connecting rod 37, which can change the pitch state of the propeller, that is, the second stepped boss 25 and the blade 26 pitch downward. Due to the special design structure of the upper pitch adjustment disc 38, it can be ensured that the propeller pitch state is changed when the transmission shaft 30 drives the propeller to rotate, thereby realizing dynamic adjustment of the propeller. The method of changing the pitch state of the lower propeller is similar.

[0066] Taking the above propeller as an example, the way to change the propeller angle of attack state is that the controller 3 outputs a signal to keep the upper adjustment motor and its gear 9 and the upper pitch adjustment motor and its gear 11 stationary; the upper angle of attack adjustment bracket and its gear 13 rotate, that is, the upper adjustment bracket 5, the lower adjustment bracket 18 and the upper pitch adjustment bracket 10, and the lower pitch adjustment bracket 17 are kept stationary, and the upper angle of attack adjustment bracket 12 and the lower angle of attack adjustment bracket 16 move up and down, see Figure 1 , Figure 5 and Fig. 9If the angle of attack of the propeller needs to be adjusted, the upper adjustment bracket 5 and the upper pitch adjustment bracket 10 need to remain stationary during the angle of attack adjustment process. The upper angle of attack adjustment bracket 12 is moved downward by the rotation of the upper angle of attack adjustment motor and its gear 13, thereby pushing the inner ring 48 of the angle of attack adjustment bracket to move downward. The inner ring 48 of the angle of attack adjustment bracket is connected and transmitted to the upper angle of attack adjustment disc 50 through the second spherical ball 49, pushing the upper angle of attack adjustment disc 50 to move downward. Since the second stepped boss 25 remains stationary, the upper angle of attack adjustment disc 50 pushes the blade 26 to rotate through the second connecting rod 46, thereby changing the angle of attack of the upper propeller. Due to the special design structure of the upper angle of attack adjustment disc 50, it is ensured that the pitch state of the propeller is changed while the propeller is rotating, thereby realizing dynamic adjustment of the propeller. The method of changing the angle of attack state of the lower propeller is similar.

[0067] When the pressure sensor 52 detects that the homogenization degree of the material has been improved, energy can be saved by reducing the motor speed, reducing the angle of attack, reducing the pitch degree, and increasing the distance between propellers, etc., according to the actual situation. The pressure sensors 52 are spread throughout the interior of the cavitation agitator to detect and compare the different data at different positions at the same time and working state in real time, and to obtain information on the different homogenization degrees and working states of each area, so as to perform focused and targeted stirring work through various dynamically adjustable parameters and working positions. For example, the pressure received at various positions in the entire stirring device tends to be average and stable, that is, operations such as reducing the speed and reducing the angle of attack can be performed to save energy.

[0068] When the data of each sensor is close to the work completion state, the controller 3 will slowly stop the rotation of the propeller, that is, reduce the speed of the No. 1 motor 6 and the No. 2 motor 19, so as to slowly stop the work of the cavitation agitator, thereby completing the mixing process. After the mixing process is completed, the controller 3 opens the outlet valve 23 to output the mixed mixture. After the process of the processing is completed and the output is completed, the outlet valve 23 is automatically closed, and the up and down position, pitch angle and angle of attack of the propeller are reset.

[0069] Each time the device is working, the vibration sensor 54 must always work and feedback the vibration intensity, so as to monitor the working state of the cavitation agitator to avoid severe vibration during operation, thereby damaging the parts of the cavitation agitator, etc. The data of the vibration sensor 54 is recorded and analyzed, so as to calculate the approximate maintenance cycle. When the maintenance cycle arrives, maintenance must be carried out so that the cavitation agitator can work for a long time.

[0070] The present invention adopts efficient cavitation effect stirring, utilizes multiple sensors and the like to dynamically collect various data during work and feeds them back to the controller 3, and can utilize the controller 3 to dynamically change and adjust various parameters of the propeller during the stirring process, thereby realizing energy integration and automation of stirring, improving stirring efficiency, and broadening the applicable range of the agitator.

Claims

1. A highly efficient dynamically adjustable feedback cavitation stirring device, comprising a water tank (29), a water pump (1) and a cavitation stirrer connected in sequence, the cavitation stirrer having a stirring chamber formed by sealingly connecting an upper cylindrical shell (14, 15) and a lower cylindrical shell (15), characterized in that: A rubber barrier layer (7) is provided on the upper end surfaces of the upper and lower cylindrical shells (14, 15); a first vertical motor (6) is provided just above the outer surface of the upper cylindrical shell (14); a second vertical motor (19) is provided just below the outer surface of the lower cylindrical shell (15); the first and second motors (6, 19) each extend a transmission shaft (30) which passes through the middle through hole of the corresponding rubber barrier layer (7) and then extends into the stirring chamber and is each connected to a propeller; a material port and a water inlet connected to a water pump (1) are provided on the upper rubber barrier layer (7); and a material outlet is provided on the lower rubber barrier layer (7); The motor housings of the first and second motors (6, 19) are respectively fixedly connected to a horizontal upper adjustment bracket (5) and a lower adjustment bracket (18); the horizontal ends of the upper and lower adjustment brackets (5, 18) are respectively connected to a vertical guide rail (4); upper and lower pitch adjustment brackets (10, 17) and upper and lower angle of attack adjustment brackets (12, 16) are also connected between the two vertical guide rails (4); and all the adjustment brackets can move up and down along the two guide rails (4); The upper and lower pitch adjustment brackets (10, 17) and the upper and lower angle of attack adjustment brackets (12, 16) all have an upper circular ring (56) and an inner circular ring (40), the upper circular ring (56) is outside the stirring chamber, the edge of the upper circular ring (56) extends downward into the stirring chamber through a middle thin rod (58) to connect with the inner circular ring (40), and an annular groove is formed on the inner wall of each inner circular ring (40); The propeller is a three-piece structure, each piece of the structure comprises a first stepped boss (24), a hinge support, a second stepped boss (25) and a blade (26) connected in sequence from the inside to the outside of the outer wall of the transmission shaft (30), the hinge support has a hole matched with the pin shaft, the second stepped boss (25) can rotate around the pin shaft relative to the first stepped boss (24) on a vertical plane, and the outer end of the second stepped boss (25) is connected to the blade (26) through a cylindrical shaft (44) and a second bearing (43); The second stepped boss (25) is hingedly connected to the pitch adjustment disc via a third hinge support (36) and a first connecting rod (37); the pitch adjustment disc (38) is sleeved on the transmission shaft (30) with a gap and the edge thereof is matched with the annular groove of the inner ring (40) of the corresponding pitch adjustment bracket via a first spherical ball (39); The blade (26) is connected to the upper end of the second connecting rod (46) through a pin shaft (47), and the lower end side of the second connecting rod (46) is connected to the angle of attack adjustment disc through a fourth hinge support (41) and another pin shaft (47). The connection between the second connecting rod (46) and the blade (26) is not in the vertical center of the blade (26) but eccentric. The angle of attack adjustment disc (50) is hollowly sleeved on the transmission shaft (30) and the edge thereof is matched with the annular groove of the inner ring (48) of the angle of attack adjustment bracket through the second spherical ball (49).

2. The high-efficiency dynamically adjustable feedback cavitation stirring device according to claim 1, characterized in that: The inner walls of the upper and lower cylindrical shells (14, 15) are provided with miniaturized and corrugated protrusions (53) equipped with pressure sensors (52), the thicker protruding positions (51) of the inner walls are provided with vibration sensors (54), the transmission shaft (30) is provided with torque sensors (28), the upper and lower adjustment brackets (5, 18), the upper and lower pitch adjustment brackets (10, 17), and the upper and lower angle of attack adjustment brackets (12, 16) are provided with displacement sensors, and all sensors are connected to a controller (3).

3. The high-efficiency dynamically adjustable feedback cavitation stirring device according to claim 1, characterized in that: The upper and lower cylindrical shells (14, 15) have the same structure and are symmetrical up and down, the two propellers have the same structure and are symmetrical up and down, the upper and lower adjustment brackets (5, 18) have the same structure and are symmetrical up and down, the upper and lower pitch adjustment brackets (10, 17) have the same structure and are symmetrical up and down, the upper and lower angle of attack adjustment brackets (12, 16) have the same structure and are symmetrical up and down, and the upper and lower rubber partitions (7) have the same structure and are symmetrical up and down.

4. The high-efficiency dynamically adjustable feedback cavitation stirring device according to claim 1, characterized in that: The rubber insulating layer (7) is in the shape of a disk, and wrinkles are present on the surface of the disk. The transmission shaft (30) and the rubber insulating layer (7) are fixedly and sealedly connected.

5. The high-efficiency dynamically adjustable feedback cavitation stirring device according to claim 1, characterized in that: The pleated portion is tightly attached around the middle thin rod (58) and is fastened by winding with a steel wire (42).

6. The high-efficiency dynamically adjustable feedback cavitation stirring device according to claim 1, characterized in that: A middle through hole is opened at the center of the rubber interlayer (7), and a plurality of small round holes are arranged in an array outside the middle through hole. The outer sealing sleeve of the transmission shaft (30) has a No. 1 bearing (31) and a shaft sleeve (32). The No. 1 bearing (31) is covered with a bearing seat (33) outside the bearing seat (33) and is fixedly connected to the No. 1 bearing (31). The shaft sleeve (32) is provided with a plurality of protruding small cylinders on the surface facing the rubber interlayer (7), and the small cylinders cooperate with the small round holes on the rubber interlayer (7) so that the shaft sleeve (32) is fixedly connected to the rubber interlayer (7).

7. The high-efficiency dynamically adjustable feedback cavitation stirring device according to claim 1, characterized in that: Both guide rails (4) are provided with vertical racks, and one end of the upper and lower adjustment brackets (5, 18), the upper and lower pitch adjustment brackets (10, 17) and the upper and lower angle of attack adjustment brackets (12, 16) is provided with an adjustment motor and its gear, the motor drives the gear to rotate, and the gear is meshed with the rack.

8. A stirring method of the high-efficiency dynamically adjustable feedback cavitation stirring device according to any one of claims 1 to 7, characterized in that The following steps are involved: Step 1): Turn on the water pump (1), the water in the water tank (29) enters the stirring chamber, add materials from the material port, turn on the No. 1 and No. 2 motors (6, 19), drive the first stepped boss (24), the second stepped boss (25), the No. 1 connecting rod (37), the pitch adjustment disc (38), the No. 2 connecting rod (46), the angle of attack adjustment disc (50) and the blade (26) to rotate simultaneously, and stir the materials; Step 2): the upper and lower adjustment brackets (5, 18), the upper and lower pitch adjustment brackets (10, 17) and the upper and lower angle of attack adjustment brackets (12, 16) move up and down at the same speed at the same time, so as to realize the up and down movement of the No. 1 and No. 2 motors (6, 19) and change the up and down position of the propeller; Step 3): Keep the upper and lower adjustment brackets (5, 18) and the upper and lower angle of attack adjustment brackets (12, 16) stationary, and move the upper and lower pitch adjustment brackets (10, 17) up and down, so as to push the inner ring (40) of the pitch adjustment bracket to move, and transmit the transmission through the No. 1 spherical ball (39) and the pitch adjustment disc (38), and the pitch adjustment disc (38) pushes the second stepped boss (25) and the blade (26) to rotate through the No. 1 connecting rod (37), and the second stepped boss (25) and the blade (26) pitch, thereby changing the pitch state of the propeller; Step 4): Keep the upper and lower adjustment brackets (5, 18) and the upper and lower pitch adjustment brackets (10, 17) stationary, and move the upper and lower angle of attack adjustment brackets (12, 16) up and down, pushing the inner ring (48) of the angle of attack adjustment bracket to move, and the second connecting rod (46) pushes the blade (26) to rotate through the second spherical ball (49) and the angle of attack adjustment disc (50) to change the angle of attack of the upper propeller.

9. The stirring method according to claim 8, characterized in that: According to different materials, stirring states and material concentration locations, the upper and lower positions of the propellers are changed to focus on stirring the concentrated area; when stirring larger material blocks, the distance between the two propellers is reduced, and vice versa, the distance between the two propellers is expanded.

10. The stirring method according to claim 8, characterized in that: When the stirring vibration is strong, reduce the pitch angle and angle of attack of the propeller, otherwise increase the pitch angle and angle of attack.

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