Blending kettle for lubricating oil production

Abstract

The invention relates to the technical field of lubricating oil production equipment, in particular to a blending kettle for lubricating oil production, which comprises a blending kettle, a motor is arranged in the middle of the top surface of a blending kettle body, and a base oil feed port and an additive feed port are respectively arranged on the top surface of the blending kettle body; the lower end of an output shaft of the motor is connected with a main rotating shaft, the main rotating shaft vertically extends downwards to an inner cavity of the blending kettle tank body, and a high-shear mixer is arranged at the bottom end of the main rotating shaft and performs first-time shear mixing on lubricating oil; the main rotating shaft vertically and downwards penetrates through the first sleeve and the second sleeve in sequence, the lower end part of the second sleeve is sleeved with a free stirring assembly through a bearing, and a free stator and a free rotor of the free stirring assembly freely rotate under the driving of central vortex kinetic energy so as to carry out secondary shearing mixing on upper-layer materials; the free stirring assembly is driven by the kinetic energy of the central vortex flow to realize free rotation so as to carry out secondary shearing mixing on the material flow, the overall energy consumption is low, and the mixing effect is good.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil production equipment technology, and in particular to a blending kettle for lubricating oil production. Background Technology

[0002] Lubricating oil is a liquid used to reduce friction in mechanical parts, protect equipment, and extend its service life. It is widely used in automobiles, aviation, industrial equipment and other fields. Lubricating oil is mainly composed of two parts: base oil and additives. Graphene microparticles, as an additive, can significantly improve lubrication performance when added to the base oil.

[0003] In the production of lubricating oil, base oil needs to be added to a lubricating oil mixing tank. The tank is heated to maintain a certain temperature, and additives, such as graphene microparticles, are added and stirred until homogeneous. Existing lubricating oil mixing tanks typically use a helical propeller agitator. The agitator shaft is usually vertical, and the helical blades are mostly three-lobed or helical spring structures. The pitch is equal to the blade diameter. When the helical blades rotate, they push the fluid along the axial direction, forming an up-and-down circulation. This is particularly suitable for low-viscosity media (such as water), where shearing action is relatively small. Homogenization is mainly achieved through high-flow-rate circulation. To maintain this high-flow-rate circulation, the motor power requirement is high, especially when processing high-density solid-liquid mixtures, where energy consumption increases significantly. The helical propeller agitator... A single stirring shaft may cause uneven mixing in certain areas. There are also paddle mixers, which consist of two blades, available in straight and folded blade forms. Straight blades are perpendicular to the direction of rotation, while folded blades are tilted at an angle to create axial flow. The blades are usually welded or bolted to the stirring shaft. The overall structure is simple and the manufacturing cost is low. However, traditional straight blades tend to form horizontal circumferential flow at low speeds, resulting in weak axial circulation and difficulty in uniformly dispersing high-viscosity lubricating oil. Folded blades have weaker shear force, and graphene nanoparticles in oil tend to form agglomerates due to strong π-π interactions and fibrous structures. Folded blades cannot completely break up these agglomerates, leading to poor uniformity of graphene particle dispersion in the lubricating oil and affecting its performance.

[0004] Therefore, this application provides a blending kettle for lubricating oil production to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide a blending kettle for lubricating oil production, which solves the problems of poor mixing effect and high energy consumption of existing lubricating oil blending kettles.

[0006] To solve the above-mentioned technical problems, the present invention provides a blending kettle for lubricating oil production, including a blending kettle, a motor is installed in the middle of the top surface of the blending kettle body, and a base oil inlet and an additive inlet are respectively provided on the top surface of the blending kettle body; the lower end of the output shaft of the motor is connected to a main rotating shaft, the main rotating shaft extends vertically downward to the inner cavity of the blending kettle tank, and a high-shear mixer is installed at the bottom end of the main rotating shaft, the high-shear mixer performs the first shear mixing of the lubricating oil; the main rotating shaft passes vertically downward through a first sleeve and a second sleeve in sequence, and a free stirring assembly is mounted on the lower end of the second sleeve through a bearing, the free stator and rotor of the free stirring assembly rotate freely under the drive of the central vortex kinetic energy to perform a second shear mixing of the upper material.

[0007] A further improvement to the technical solution of the present invention is as follows: a hollow support frame is vertically arranged at the center of the top surface of the mixing vessel, a motor is arranged at the top of the support frame, the output shaft of the motor is fitted inside the support frame, the lower end of the output shaft is connected to the main rotating shaft through a coupling, the main rotating shaft vertically passes through the first sleeve and the second sleeve, the top end of the first sleeve is connected to the bottom end of the support frame through a flange, the lower end of the first sleeve is screwed to the second sleeve, the outer wall of the first sleeve is provided with a circular upper stop edge, the outer wall of the second sleeve is provided with a circular lower stop edge, and the bottom end of the second sleeve is integrally provided with an upper flange.

[0008] A further improvement of the technical solution of the present invention is that: a high-shear mixer is provided at the bottom of the second sleeve, and the high-shear mixer also includes a rotor A. The rotor A has an inverted blind-end cylindrical structure. A central hole is provided on the top surface of the rotor A. The lower end of the main shaft is fitted into the central hole. The rotor A is fixed to the lower end of the main shaft by a nut. Several strip grooves A are evenly opened on the side wall of the rotor A. Several blades A are integrally provided on the inner side of the strip grooves A.

[0009] A further improvement of the technical solution of the present invention is that: a stator A is arranged at a distance from the outer side of the rotor A body, a lower flange is integrally arranged at the top of the stator A, the lower flange is connected to the upper flange by bolts, and a number of elongated holes A are evenly opened on the side wall of the stator A.

[0010] A further improvement of the technical solution of the present invention is that the distance between rotor A and stator A is 0.1mm~1.0mm.

[0011] A further improvement of the technical solution of the present invention is that: the free stirring component is disposed between the upper baffle and the lower baffle, the free stirring component also includes a rotating paddle, the two ends of the central sleeve of the rotating paddle are adapted to be provided with a first bearing and a second bearing, the first bearing and the second bearing are adapted to be installed at the lower end of the first sleeve, and a plurality of blades are evenly arranged along the circumference on the outer wall of the central sleeve.

[0012] A further improvement of the technical solution of the present invention is that the blade is a tapered arc-shaped structure, and a horizontal upper fold edge and an arc-shaped lower fold edge are respectively provided on one side edge of the blade.

[0013] A further improvement of the technical solution of the present invention is that: a free stator and rotor are provided at the end of the upper folded edge, the free stator and rotor also includes a stator B, a plurality of elongated holes B are evenly opened on the side wall of the stator B, a vertical fixed shaft is integrally provided on the inner side of the top surface of the stator B, the bottom end of the fixed shaft is screwed into the mounting groove, and the mounting groove is integrally provided on the end of the upper surface of the upper folded edge body.

[0014] A further improvement of the technical solution of the present invention is that: the rotor B is arranged at intervals on the inner side of the stator B, the rotor B is in the shape of an upright cylinder, the center of the rotor B is provided with a vertical tube, the vertical tube is movably fitted into the fixed shaft body, the side wall of the rotor B is evenly provided with a number of strip grooves B, and a number of blades B are integrally arranged on the inner side of the strip grooves B.

[0015] A further improvement of the technical solution of the present invention is that: a groove is provided at the bottom end of the output shaft, and a protrusion is integrally provided at the top end of the main rotating shaft, with the protrusion fitting into the groove.

[0016] A further improvement of the technical solution of the present invention is that the high-shear mixer and the free stirring assembly are respectively located at 1 / 3 and 2 / 3 of the distance from the bottom wall of the mixing vessel.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects: 1. The present invention provides a blending kettle for lubricating oil production. The blending kettle achieves full-area coverage mixing by setting a free stirring component above a high-strength shearing device, eliminating dead zones. The high-strength shearing device below is driven by a motor to perform the main shearing and mixing. During the shearing and mixing process, a vortex is generated in the center of the blending kettle. The centrifugal force of the vortex drives the blades of the rotating paddle to rotate freely. During the free rotation of the blades, the upper layer of lubricating oil is stirred and mixed. At the same time, under the flow guiding effect of the blades, the free stator and rotor achieve secondary shearing of the upper layer of fluid, which significantly improves the mixing effect.

[0018] 2. The present invention provides a blending vessel for lubricating oil production. The high-strength shearing device performs the main shearing and mixing. Under the centrifugal force of the high-speed rotor A, the material is drawn into the inner cavity of rotor A from the axial direction (bottom end of rotor A), and then radially thrown into the narrow gap between rotor A and stator A. In the narrow gap, the fluid forms a velocity gradient due to viscous resistance, generating laminar shear force, which effectively breaks up the aggregates of graphene nanoparticles and other particles, achieving effective crushing and mixing. Compared with spiral propeller agitators or paddle agitators, graphene microparticles are more uniformly dispersed in lubricating oil, and the mixing effect is better.

[0019] 3. The present invention provides a blending kettle for lubricating oil production. During the operation of the high-strength shearer, a large central turbulent vortex is generated. The central turbulent vortex drives the rotating paddle to rotate freely without the need for electric drive, thus reducing energy consumption by 20-30%.

[0020] 4. The present invention provides a blending kettle for lubricating oil production. The end of the rotating paddle is equipped with a free stator and rotor. Under the guiding action of the upper and lower folded edges of the paddle, the material impacts into the inner cavity from the bottom end of the rotor B along the paddle, so that the rotor B rotates freely on the rotating shaft. The material at the upper edge of the blending kettle is subjected to secondary shearing and mixing. At the same time, the free rotation of the rotating paddle and the free stator and rotor does not require electric drive, saving energy consumption while improving the mixing effect.

[0021] 5. The present invention provides a blending kettle for lubricating oil production, wherein the first sleeve and the second sleeve are screwed together, which facilitates the disassembly and replacement of the rotating paddle, and the free stator and rotor are screwed into the mounting groove, making operation simple and convenient for maintenance and repair.

[0022] 6. The present invention provides a blending kettle for lubricating oil production, wherein the output shaft and the main rotating shaft are connected by an embedded connection of a protrusion and a groove. The precise fit between the protrusion and the groove can achieve automatic radial alignment, eliminating the need for complex adjustments during installation. This reduces the bending deformation of the rotating shaft caused by forced connection due to poor alignment of the rigid coupling, which can lead to radial alternating force. The embedded structure of the protrusion and the groove suppresses lateral vibration through mechanical constraint, thereby improving the dynamic stability of the main rotating shaft. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A schematic diagram of a blending vessel for lubricating oil production; Figure 2 for Figure 1 Sectional view in; Figure 3 This is a schematic diagram of the coupling structure; Figure 4 This is a sectional view of the coupling; Figure 5 This is a partial cross-sectional view of the free-stirring assembly; Figure 6 Schematic diagram of the connection relationship of the free stirring components; Figure 7 A schematic diagram showing the connection between the first and second sleeves; Figure 8 A schematic diagram showing the disassembly of the first and second sleeves. Figure 9 This is a magnified view of a high-shear mixer. Figure 10Exploded view of a high-shear mixer; Figure 11 This is a schematic diagram of the rotor A. Figure 12 This is a schematic diagram of the stator A. Figure 13 This is a schematic diagram of the free-stirring assembly. Figure 14 This is a magnified view of a free stator and rotor. Figure 15 This is a schematic diagram of the mounting slot structure; Figure 16 This is a schematic diagram of the stator B and rotor B.

[0025] Reference numerals: 1. Blending vessel; 11. Base oil inlet; 12. Additive inlet; 2. Support frame; 21. First flange; 22. Coupling; 3. Motor; 31. Output shaft; 311. Groove; 32. Main shaft; 321. Protrusion; 33. First sleeve; 331. Upper flange; 332. Second flange; 34. Second sleeve; 341. Upper flange; 342. Lower flange; 4. High-shear mixer; 41. Rotor A; 411. Center hole; 412. Nut; 413. Slot A; 414. 42. Blade A; 42. Stator A; 421. Lower flange; 422. Elongated hole A; 5. Free stirring assembly; 51. Rotary paddle; 511. Central sleeve; 512. Blade; 5121. Upper folded edge; 5122. Lower folded edge; 5123. Mounting groove; 513. First bearing; 514. Second bearing; 52. Free stator and rotor; 521. Stator B; 5211. Elongated hole B; 5212. Fixed shaft; 522. Rotor B; 5221. Riser; 5222. Strip groove B; 5223. Blade B. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] The present invention will be further explained below with reference to specific embodiments.

[0030] like Figures 1-16As shown in the figure, this embodiment provides a blending vessel for lubricating oil production, including a blending vessel 1. A motor 3 is installed in the middle of the top surface of the blending vessel 1. The top surface of the blending vessel 1 is also provided with a base oil inlet 11 and an additive inlet 12. The lower end of the output shaft 31 of the motor 3 is connected to a main rotating shaft 32. The main rotating shaft 32 extends vertically downward into the inner cavity of the blending vessel 1. A high-shear mixer 4 is installed at the bottom of the main rotating shaft 32. The high-shear mixer 4 performs the first shearing and mixing of the lubricating oil. The main rotating shaft 32 then extends vertically downward to... The first sleeve 33 and the second sleeve 34 are connected by threaded fittings. A free stirring assembly 5 is fitted at the threaded connection between the first sleeve 33 and the second sleeve 34. The free rotor 52 in the free stirring assembly 5 rotates freely under the drive of the central vortex kinetic energy to perform secondary shearing and mixing of the upper material. Specifically, the high-shear mixer 4 and the free stirring assembly 5 are respectively located at 1 / 3 and 2 / 3 of the distance from the inner cavity of the mixing vessel 1. A base oil inlet 11 and an additive inlet 12 are provided on the top surface of the mixing vessel 1. Graphene microparticles are introduced from the additive inlet... Adding the additive to the mixing vessel 1 through the feed inlet 12, and after the materials (base oil and graphene microparticles) are added in proportion, the high-shear mixer 4 at the bottom of the main shaft 32 shears and mixes the materials. Under the centrifugal force of the high-speed rotor A41, the materials are drawn axially from the bottom of rotor A41 into the inner cavity of rotor A41, and then radially thrown into the narrow gap between rotor A41 and stator A42. In the narrow gap, the fluid forms a velocity gradient due to viscous resistance, generating laminar shear force, which is then released from the side wall of stator A42. The elongated hole A422 is thrown out, effectively breaking up agglomerates of graphene nanoparticles and other particles, achieving effective crushing and mixing. While the rotor A41 rotates, it generates a large central vortex in the entire mixing vessel 1. The vortex kinetic energy can drive the rotating paddle 51 in the free stirring component 5 to rotate freely without the need for electric drive, reducing energy consumption by 20-30%. At the same time, the free stator rotor 52 on the tip of the rotating paddle 51 also rotates freely under the impact of the liquid flow, realizing secondary shearing of the upper material and significantly improving mixing efficiency.

[0031] like Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8As shown, in this embodiment, a hollow support frame 2 is vertically arranged at the center of the top surface of the mixing vessel 1. A first flange 21 is integrally provided at the bottom end of the support frame 2, and a motor 3 is provided at the top end of the support frame 2. The output shaft 31 of the motor 3 is fitted inside the support frame 2. The lower end of the output shaft 31 is connected to the main rotating shaft 32 through a coupling 22. The main rotating shaft 32 vertically downwards passes through the first sleeve 33 and the second sleeve 34 in sequence. The second flange 332 at the top end of the first sleeve 33 is bolted to the first flange 21. The lower end of the first sleeve 33 is screwed to the second sleeve 34. A circular upper baffle 331 is provided on the outer wall of the first sleeve 33, and a circular lower baffle 342 is provided on the outer wall of the second sleeve 34. An upper flange 341 is integrally provided at the bottom end of the second sleeve 34. Specifically, the hollow... The support frame 2 facilitates observation of the operation of the output shaft 31 of the motor 3. The support frame 2, the first sleeve 33, and the second sleeve 34 are all made of stainless steel with a certain thickness and strength. The bottom end of the support frame 2 is connected to the first sleeve 33 through the first flange 21 and the second flange 332 and screwed to the top of the mixing vessel 1 to ensure the stability of the entire support frame 2 and the motor 3. The first sleeve 33 and the second sleeve 34 are hollow tubular bodies. The first sleeve 33 and the second sleeve 34 can protect the output shaft 31 from material contamination. At the same time, the lower end of the first sleeve 33 is fitted with the free stirring component 5 through the first bearing 513 and the second bearing 514. Then, the second sleeve 34 is screwed to the first sleeve 33 to facilitate the installation and disassembly of the free stirring component 5.

[0032] like Figures 9-12As shown, in this embodiment, a high-shear mixer 4 is provided at the bottom end of the second sleeve 34. The high-shear mixer 4 also includes a rotor A41. The rotor A41 has an inverted blind-end cylindrical structure. A central hole 411 is provided on the top surface of the rotor A41. The lower end of the main rotating shaft 32 is fitted into the central hole 411. The rotor A41 is fixed to the lower end of the main rotating shaft 32 by a nut 412. Several strip grooves A413 are evenly opened on the side wall of the rotor A41. Several blades A414 are integrally provided on the inner side of the strip grooves A413. Stator A42 is provided at intervals on the outer side of the rotor A41 body. A lower flange 421 is integrally provided on the top of the stator A42. The lower flange 421 is connected to the upper flange 341 by bolts. The stator A42 has several elongated holes A422 evenly distributed on its sidewall; the distance between the rotor A41 and the stator A42 is 0.1mm~1.0mm; specifically, the high-shear mixer 4 also includes a rotor A41 and a stator A42. During installation, the rotor A41 is first fitted onto the lower end of the main shaft 32 through the center hole 411, and then the nut 412 is used to tighten it from the inner cavity of the rotor A41 to the bottom end of the main shaft 32. Then, the stator A42 is fitted onto the outside of the rotor A41 from bottom to top, and the lower flange 421 is made to abut against the upper flange 341. Finally, the lower flange 421 and the upper flange 341 are fixed with bolts; the strip groove A413 mainly forms a fluid inlet and outlet channel, forcing the material to react. Multiple shearing cycles are achieved through the gap between rotor A41 and stator A42, avoiding mixing dead zones. Simultaneously, the strip groove A413 guides the fluid radially while promoting axial flow, inducing vortices and turbulence in the material, enhancing three-dimensional mixing uniformity. Stator A42 has a ring-like structure, with the lower flange 421 at the top of stator A42 and the upper flange 341 at the bottom of the second sleeve 34 bolted together. Four blades A414 are arranged in a circular spiral on the inner side of rotor A41. These blades rotate spirally with rotor A41, generating vortices that facilitate upward material flow. Rotor A41 is connected to the main shaft 3... 2. The rotor A41 rotates relative to the stator A42. The material is drawn in from the bottom of the rotor A41. Under the centrifugal force generated by the rotation of the rotor A41, the material is thrown towards the side wall and flows into the gap between the stator A42 and the rotor A41 through the strip groove A413. The gap is 0.5mm~1.0mm. This gap is smaller than the graphene microparticle agglomerates. The graphene microparticle agglomerates are sheared and crushed in this gap. Then, the material is thrown out of the high-shear mixer 4 through the elongated hole A422 of the stator A42. The elongated hole A422 guides the fluid to diffuse radially and form axial backflow (such as "pumping effect"), eliminating local concentration gradients, avoiding mixing dead zones, and achieving uniform mixing of graphene microparticles and base oil.

[0033] like Figure 6 , Figures 13-16As shown, in this embodiment, the free stirring assembly 5 is adapted to be disposed in the area between the upper baffle 331 and the lower baffle 342. The free stirring assembly 5 also includes a rotating paddle 51. The two ends of the central sleeve 511 of the rotating paddle 51 are adapted to install a first bearing 513 and a second bearing 514. The first bearing 513 and the second bearing 514 are adapted to be installed at the lower end of the first sleeve 33. A plurality of blades 512 are evenly arranged along the circumference of the outer wall of the central sleeve 511. The blades 512 have a tapered arc-shaped structure, and a horizontal upper folded edge 5121 and an arc-shaped lower folded edge 5122 are respectively provided on one side edge of the blades 512. Specifically, the upper baffle 331 and the lower baffle 342 respectively limit and fix the first bearing 513 and the second bearing 514, and at the same time facilitate the installation of the first bearing 513 and the second bearing 514. The rotating paddle 51 also includes a central sleeve 511 and a plurality of blades 512. The sleeve 511 is a hollow cylinder. The central sleeve 511 is fitted to the lower end of the first sleeve 33 through the first bearing 513 and the second bearing 514. During installation, the first sleeve 33 is first connected to the support frame 2 through the flange and fixed to the body of the mixing vessel 1. Then, the rotating paddle 51 is fitted onto the body of the first sleeve 33. Finally, the top end of the second sleeve 34 is screwed to the bottom end of the first sleeve 33. The gradually tapered arc-shaped blade 512 is conducive to increasing the contact area with the material. The blade 512 is geometrically gradient (wide and thick at the root and sharp at the end). At the same time, the upper folded edge 5121 and the lower folded edge 5122 can concentrate the fluid kinetic energy to the end of the blade. The length of the lower folded edge 5122 is less than the length of the blade 512. The rear end of the lower folded edge 5122 is open, which facilitates the material to generate a large area of ​​impact force on the free stator rotor 52, so that the free stator rotor 52 can play a secondary shearing and mixing role.

[0034] like Figures 13-14As shown, in this embodiment, a free stator and rotor 52 is provided at the end of the upper folded edge 5121. The free stator and rotor 52 also includes a stator B521. Several elongated holes B5211 are evenly opened on the side wall of the stator B521. A vertical fixed shaft 5212 is integrally provided on the inner side of the top surface of the stator B521. The bottom end of the fixed shaft 5212 is screwed into the mounting groove 5123. The mounting groove 5123 is integrally provided on the end of the upper surface of the upper folded edge 5121 body. Rotors B522 are arranged at intervals on the inner side of the stator B521. The rotors B522 are in the shape of an upright cylinder. A vertical tube is provided at the center of the rotors B522. 5221, the riser tube 5221 is movably fitted into the fixed shaft 5212 body. Several strip-shaped grooves B5222 are evenly distributed on the side wall of the rotor B522, and several blades B5223 are integrally formed inside the strip-shaped grooves B5222. Specifically, a cylindrical mounting groove 5123 is integrally formed on the upper surface of the end of the upper folded edge 5121. The length of the fixed shaft 5212 is greater than the length of the riser tube 5221. During installation, the fixed shaft 5212 of the stator B521 is first inserted into the riser tube 5221 of the rotor B522, and then the bottom end of the fixed shaft 5212 is screwed into the mounting groove 5123. Within 23, the material flowing from the upper folded edge 5121 and lower folded edge 5122 enters from rotor B522 and drives blades B5223 to rotate freely. Under centrifugal force, the material is thrown towards the side wall of rotor B522 and flows through the strip groove B5222 into the gap between stator B521 and rotor B522. This gap is 0.3~0.5mm, which is smaller than the gap between stator A42 and rotor A41. The smaller gap between stator B521 and rotor B522 helps to further refine the graphene particles. The material then passes through the long... The orifice B5211 guides the fluid to diffuse radially while forming axial backflow, eliminating local concentration gradients in the inner edge area of ​​the mixing vessel 1, avoiding mixing dead zones, and achieving uniform mixing of graphene particles and base oil. The rotor B522 rotates freely on the fixed shaft 5212, performing secondary shearing and mixing on the material at the upper edge of the mixing vessel 1. At the same time, the free rotation of the rotating paddle 51 and the free fixed rotor 52 does not require electric drive, saving energy while improving the mixing effect. The mixed lubricating oil is discharged through the outlet at the bottom of the mixing vessel 1 (not shown in the figure).

[0035] like Figure 4 As shown, in this embodiment, a groove 311 is provided at the bottom end of the output shaft 31, and a protrusion 321 is integrally provided at the top end of the main rotating shaft 32. The protrusion 321 is adapted to be embedded in the groove 311. Specifically, the protrusion 321 can be any one of a cylinder, cuboid, or cube, and the groove 311 is a cavity structure adapted to the shape of the protrusion 321. The precise fit between the protrusion 321 and the groove 311 can achieve radial automatic alignment, which is convenient for connection and installation. At the same time, the embedded structure of the protrusion 321 and the groove 311 suppresses lateral vibration through mechanical constraint, thereby improving the dynamic stability of the main rotating shaft 32.

[0036] This invention provides a working principle for a blending reactor used in lubricant production: After the materials (base oil and graphene microparticles) are added in proportion, the high-shear mixer 4 at the bottom of the main shaft 32 shears and mixes the materials. Under the centrifugal force of the high-speed rotor A41, the materials are drawn into the inner cavity of rotor A41 from the bottom of rotor A41, and then radially thrown into the narrow gap between rotor A41 and stator A42. Within the narrow gap, the fluid forms a velocity gradient due to viscous resistance, generating laminar shear force. Subsequently, it is thrown out through the elongated hole A422 on the side wall of stator A42, effectively breaking up agglomerates and other particles of graphene nanoparticles, achieving effective powdering. During crushing and mixing, the rotation of rotor A41 generates a large central vortex in the entire mixing vessel 1. The vortex kinetic energy can drive the rotating paddle 51 in the free stirring component 5 to rotate freely without the need for electric drive, reducing energy consumption by 20-30%. At the same time, under the guiding effect of the upper folding edge 5121 and the lower folding edge 5122, the material impacts the free stator and rotor 52 on the upper folding edge 5121 body. The rotor B522 rotates freely on the fixed shaft 5212, and the rotor B522 rotates relative to the stator A42, realizing secondary shearing of the material at the upper edge of the mixing vessel 1, which significantly improves the mixing efficiency and mixing effect, while maintaining low energy consumption.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A blending kettle for lubricating oil production, characterized in that, The mixture includes a mixing vessel (1), a motor (3) is installed in the middle of the top surface of the mixing vessel (1), and a base oil inlet (11) and an additive inlet (12) are also installed on the top surface of the mixing vessel (1); the output shaft (31) of the motor (3) passes through the top surface of the mixing vessel (1) and is connected to the main rotating shaft (32), the main rotating shaft (32) extends vertically downward to the inner cavity of the mixing vessel (1), a high shear mixer (4) is installed at the bottom of the main rotating shaft (32), the high shear mixer (4) performs the first shear mixing of the lubricating oil; the main rotating shaft (32) is vertically downward and sequentially adapted to pass through the first sleeve (33) and the second sleeve (34), the lower end of the first sleeve (33) is fitted with a free stirring assembly (5) through a bearing, the free stator and rotor (52) in the free stirring assembly (5) rotates freely under the drive of the central vortex kinetic energy to perform a second shear mixing of the upper material.

2. The blending kettle for lubricating oil production according to claim 1, characterized in that, A hollow support frame (2) is vertically installed at the center of the top surface of the mixing vessel (1). A first flange (21) is integrally installed at the bottom end of the support frame (2). A motor (3) is installed at the top of the support frame (2). The output shaft (31) of the motor (3) is fitted inside the support frame (2). The lower end of the output shaft (31) is connected to the main shaft (32) through a coupling (22). The main shaft (32) passes vertically downward through the first sleeve (33) and the second sleeve (34) in sequence. The second flange (332) at the top of the first sleeve (33) is bolted to the first flange (21). The lower end of the first sleeve (33) is screwed to the second sleeve (34). A ring-shaped upper baffle (331) is installed on the outer wall of the first sleeve (33). A ring-shaped lower baffle (342) is installed on the outer wall of the second sleeve (34). An upper flange (341) is integrally installed at the bottom end of the second sleeve (34).

3. The blending kettle for lubricating oil production according to claim 2, characterized in that, The second sleeve (34) is equipped with a high-shear mixer (4) at the bottom end. The high-shear mixer (4) also includes a rotor A (41). The rotor A (41) has an inverted blind-end cylindrical structure. The top surface of the rotor A (41) is provided with a central hole (411). The lower end of the main shaft (32) is fitted inside the central hole (411). The rotor A (41) is fixed to the lower end of the main shaft (32) by a nut (412). Several strip grooves A (413) are evenly opened on the side wall of the rotor A (41). Several blades A (414) are integrally arranged inside the strip grooves A (413).

4. The blending kettle for lubricating oil production according to claim 3, characterized in that, The stator A (42) is set at a distance from the outer side of the rotor A (41). The lower flange (421) is integrally set at the top of the stator A (42). The lower flange (421) is connected to the upper flange (341) by bolts. Several elongated holes A (422) are evenly opened on the side wall of the stator A (42).

5. The blending kettle for lubricating oil production according to claim 4, characterized in that, The distance between rotor A (41) and stator A (42) is 0.1mm~1.0mm.

6. The blending kettle for lubricating oil production according to claim 1, characterized in that, The free stirring assembly (5) is located between the upper baffle (331) and the lower baffle (342). The free stirring assembly (5) also includes a rotating paddle (51). The two ends of the central sleeve (511) of the rotating paddle (51) are adapted to be provided with a first bearing (513) and a second bearing (514). The first bearing (513) and the second bearing (514) are adapted to be installed at the lower end of the first sleeve (33). Several blades (512) are evenly arranged along the circumference on the outer wall of the central sleeve (511).

7. The blending kettle for lubricating oil production according to claim 6, characterized in that, The blade (512) has a tapered arc structure. A horizontal upper fold (5121) and an arc-shaped lower fold (5122) are respectively provided on one side edge of the blade (512). The upper fold (5121) and the lower fold (5122) form a flow channel for lubricating oil to flow to the bottom of the free stator and rotor (52).

8. The blending kettle for lubricating oil production according to claim 7, characterized in that, A free stator (52) is provided at the end of the upper folded edge (5121). The free stator (52) also includes a stator B (521). Several elongated holes B (5211) are evenly opened on the side wall of the stator B (521). A vertical fixed shaft (5212) is integrally provided on the inner side of the top surface of the stator B (521). The bottom end of the fixed shaft (5212) is screwed into the mounting groove (5123). The mounting groove (5123) is integrally provided at the end of the upper surface of the upper folded edge (5121).

9. The blending kettle for lubricating oil production according to claim 8, characterized in that, The rotor B (522) is arranged at intervals inside the stator B (521). The rotor B (522) is in the shape of an upright cylinder. The center of the rotor B (522) is provided with a vertical tube (5221). The vertical tube (5221) is movably fitted into the body of the fixed shaft (5212). Several strip grooves B (5222) are evenly opened on the side wall of the rotor B (522). Several blades B (5223) are integrally arranged inside the strip grooves B (5222).

10. The blending kettle for lubricating oil production according to claim 1, characterized in that, The bottom end of the output shaft (31) is provided with a groove (311), and the top end of the main shaft (32) is provided with a protrusion (321), which is adapted to be embedded in the groove (311).

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