A mixing device and preparation method for composite lubricating material

Abstract

The present invention relates to the technical field of mixing devices, and discloses a mixing device and a preparation method for composite lubricating material preparation, wherein a mixing device for composite lubricating material preparation comprises a homogenizing barrel, a barrel cover arranged at the opening of the homogenizing barrel, a motor bracket arranged on the barrel cover, a driving motor 1 arranged on the motor bracket, and a stirring shaft connected to the main shaft of the driving motor 1, wherein the stirring shaft passes through the barrel cover and extends to the bottom of the homogenizing barrel, and a stirring unit is arranged on the stirring shaft. The mixing device for composite lubricating material preparation is characterized in that an upper homogenizing plate, a middle homogenizing plate and a lower homogenizing plate are hinged in sequence, and the upper homogenizing plate floats on the surface of a liquid layer. When the liquid layer in the homogenizing barrel changes, the buoyancy plate drives the upper homogenizing plate, the middle homogenizing plate and the lower homogenizing plate to change their positions, and they are evenly distributed in the liquid layer again, so that the homogenizing plate always maintains a high mixing efficiency for materials of different depths.

Description

Technical Field

[0001] The present invention relates to the technical field of mixing devices, and in particular to a mixing device and a preparation method for a composite lubricating material. Background Art

[0002] Homogenizer is a mechanical device used to homogenize, disperse, emulsify and crush liquid or semi-liquid materials. Its main function is to refine large particles or droplets in the material into smaller particle sizes through high pressure, high-speed shear or impact, so as to obtain a uniform and stable mixture. Homogenizer is widely used in food, pharmaceutical, chemical and other industries.

[0003] A grinding homogenizer is disclosed in the patent with patent publication number CN111215200A, including an upper tank body, a feeding mechanism, a stirring mechanism, and a homogenizing mechanism, wherein the feeding mechanism is arranged at the upper edge of the upper tank body, the feeding mechanism includes a feeding frame embedded and installed on the upper tank body, a first motor is arranged on the upper part of the feeding frame, a shredding blade is arranged on the part of the first motor shaft located in the feeding frame, and a dispersing blade is arranged on the part of the first motor shaft located outside the feeding frame; the stirring mechanism is arranged at the upper center part of the upper tank body; the homogenizing mechanism is connected to the bottom of the upper tank body, the homogenizing mechanism includes a homogenizing box, a rotor driven by a third motor is arranged in the homogenizing box, and a stator arranged outside the rotor can be moved up and down by an external driving device to achieve an adjustable gap with the rotor, the device crushes and homogenizes the solid feed, and realizes the crushing and homogenization of the solid feed.

[0004] The prior art has the following defects:

[0005] In a stirring device, if the position of the homogenizing plate used for stirring remains unchanged relative to the liquid surface, while the liquid level changes, the following adverse effects may occur;

[0006] Unstable stirring efficiency: When the liquid level drops, part of the stirring plate may be exposed to the air, resulting in reduced stirring efficiency and failure to effectively stir the liquid; conversely, when the liquid level rises, the stirring plate may be completely submerged, and the stirring effect may not be as expected;

[0007] Uneven mixing: If the position of the stirring plate is not adjusted as the liquid level changes, the upper and lower layers of the liquid may be mixed unevenly. When the stirring plate is fixed at a certain height, only part of the liquid may be stirred, while other areas may not be fully mixed;

[0008] Dead zones and stagnant zones: Fixed-position stirring plates may create dead zones or stagnant zones in the liquid. The liquid in these areas may not be effectively stirred, resulting in uneven material distribution and affecting the quality of the final product.

[0009] Shear force changes: As the liquid level changes, the fixed position of the stirring plate may cause the shear force to change, especially when the liquid level is higher or lower than the optimal position of the stirring plate design, it may produce too high or too low shear force, affecting the processing of sensitive materials;

[0010] Increased energy consumption: If the position of the stirring plate is not adjusted with the liquid level, it may lead to reduced energy utilization efficiency. For example, when the liquid level is low, the idling part of the stirring plate will waste energy; when the liquid level is high, additional energy may be required to drive a larger volume of liquid. Summary of the invention

[0011] In view of the problem in the prior art that the homogenizing plate is fixed relative to the rotating shaft and cannot be fully utilized when the liquid level changes, a mixing device and a preparation method for a composite lubricating material are proposed.

[0012] One aspect of the present application provides a mixing device for preparing a composite lubricating material, the purpose of which is that when the liquid layer in the homogenizing barrel changes, multiple homogenizing plates are redistributed evenly in the liquid layer so that the homogenizing plates always maintain high mixing efficiency for materials at different depths.

[0013] The technical solution of the present invention is: a mixing device for preparing a composite lubricating material, comprising a homogenizing barrel, a barrel cover arranged at the opening of the homogenizing barrel, a motor bracket arranged on the barrel cover, a driving motor 1 arranged on the motor bracket, and a stirring shaft connected to the main shaft of the driving motor 1, wherein the stirring shaft passes through the barrel cover and extends to the bottom of the homogenizing barrel, and is characterized in that: a stirring unit is arranged on the stirring shaft;

[0014] The stirring unit comprises a mouth-shaped stirring frame arranged on the stirring shaft, sliding grooves are provided in the vertical bars on both sides of the stirring frame, and springs are provided at the tops of the sliding grooves, and an upper homogenizing plate, a middle homogenizing plate and a lower homogenizing plate are symmetrically arranged along the stirring shaft, and the edges of the upper homogenizing plate and the lower homogenizing plate are fixedly connected with sliding columns, and the sliding columns are arranged in the sliding grooves, and the lower homogenizing plate is fixed at the bottom of the sliding grooves through the sliding columns, and the upper homogenizing plate slides along the sliding grooves through the sliding columns, and a connecting rod 1 is hinged between the middle homogenizing plate and the upper homogenizing plate and the lower homogenizing plate, and two groups of through holes are horizontally provided on the middle homogenizing plate, and a pair of U-shaped sliding rods slide through the through holes of the middle homogenizing plate on both sides of the stirring shaft respectively, and the U-shaped sliding rods in symmetrical positions are connected by connecting blocks, and the stirring shaft is provided with a through groove that penetrates left and right, and the connecting block slides vertically in the through groove, and a buoyancy plate is slidingly sleeved on the stirring shaft, and a connecting rod 2 is hinged between the buoyancy plate and the upper homogenizing plate in a symmetrical position;

[0015] When the homogenizing barrel is filled with liquid, the buoyancy plate floats on the liquid, the spring is in a compressed state, and the upper homogenizing plate, the middle homogenizing plate and the lower homogenizing plate are equidistantly distributed in the liquid layer.

[0016] By adopting the above scheme, the upper homogenizing plate, the middle homogenizing plate and the lower homogenizing plate are hinged in sequence and the upper homogenizing plate floats on the surface of the liquid layer. When the liquid layer in the homogenizing barrel changes, the buoyancy plate drives the upper homogenizing plate, the middle homogenizing plate and the lower homogenizing plate to change their positions and redistribute them evenly in the liquid layer, so that the homogenizing plate always maintains a high mixing efficiency for materials at different depths.

[0017] Furthermore, scrapers are provided on the vertical bars and the bottom bar on both sides of the stirring frame, and the scrapers are in contact with the inner wall of the homogenizing barrel.

[0018] By adopting the above scheme, a plurality of scrapers are provided to scrape off the materials adhering to the inner wall of the homogenizing barrel and make them blend into the liquid material.

[0019] Furthermore, the barrel cover is provided with a solid feed inlet and a liquid feed inlet.

[0020] By adopting the above solution, different feeding ports are provided for the solid material and the liquid material respectively, so that the solid material can be more evenly dispersed in the liquid when being put in.

[0021] Furthermore, a plurality of drag reduction holes are provided on the upper homogenizing plate, the middle homogenizing plate and the lower homogenizing plate.

[0022] By adopting the above scheme, the pressure of the liquid material on each homogenizing plate during the stirring process is reduced by setting the drag reducing holes.

[0023] Furthermore, the upper homogenizing plate, the middle homogenizing plate and the lower homogenizing plate are all provided with elastic drag reducing plates, a hole is opened in the center of the elastic drag reducing plate, and cracks are evenly distributed from the hole wall to the edge of the elastic drag reducing plate to form a plurality of elastic teeth.

[0024] By adopting the above scheme, a deformable elastic drag reducing sheet is provided. When the homogenizing plate encounters greater resistance during rotation, the elastic teeth are deformed, thereby expanding the size of the center hole of the elastic drag reducing sheet. The elastic drag reducing sheet adaptively changes the center hole, thereby keeping the resistance encountered by the homogenizing plate during stirring relatively stable.

[0025] Furthermore, a second driving motor is provided at the bottom of the homogenizing barrel, a discharge cavity is connected through the bottom of the homogenizing barrel, a discharge tooth is provided on the second main shaft of the driving motor, a discharge pipe is provided on the side wall of the discharge cavity, and a filter is provided between the discharge tooth and the discharge cavity.

[0026] With the above solution, the mixed material subjected to centrifugal force is discharged from the discharge pipe by the rotation of the discharge teeth. Meanwhile, the filter screen is arranged to prevent agglomerated materials from being discharged from the discharge pipe.

[0027] Furthermore, a valve is provided at the end of the discharge pipe, and a reflux pipe is connected to the discharge pipe, and the other end of the reflux pipe is connected to the homogenizing barrel from above the side wall of the homogenizing barrel.

[0028] By adopting the above scheme, a reflux pipe is provided to make the lower layer of mixed materials in the homogenizing barrel flow back to the upper layer of the liquid surface, so that the lower layer materials and the upper layer materials are fully integrated, thereby improving the stirring effect.

[0029] Furthermore, a barrel support is provided at the bottom of the homogenizing barrel, and a plurality of legs are connected to the bottom of the barrel support.

[0030] By adopting the above solution and providing the barrel support and the supporting legs, the stability of the entire device is increased.

[0031] Another aspect of the present invention provides a method for preparing a composite lubricating material, comprising the following steps:

[0032] Step 1: Use wet mixing, pour industrial alcohol into a homogenizing barrel, add nano silicon nitride to the industrial alcohol, stir evenly, then add polyimide, graphite and carbon fiber in sequence, mix well, and then filter and dry; the composition and mass fraction of the composite lubricating material are polyimide 55-75%, carbon fiber 10-25%, graphite 5-20%, and nano silicon nitride 3-8%;

[0033] Step 2: Pour the mixed mold material into the mold for hot pressing at a molding temperature of 360-380°C and a pressure of 35-40MPa. Keep the temperature and pressure for 40-60 minutes and cool naturally.

[0034] By adopting the above scheme, the polyimide self-lubricating composite material prepared by the method has the characteristics of high mechanical strength, small friction coefficient, low wear rate, etc., and has good lubrication performance and mechanical properties. The friction coefficient of the polyimide material can be reduced by producing a thin and uniform transfer film on the contact surface, thereby improving the material's friction reduction and wear resistance and extending the material's service life.

[0035] Beneficial effects of the present invention:

[0036] The upper homogenizing plate, the middle homogenizing plate and the lower homogenizing plate are hinged in sequence and the upper homogenizing plate floats on the surface of the liquid layer. When the liquid layer in the homogenizing barrel changes, the buoyancy plate drives the upper homogenizing plate, the middle homogenizing plate and the lower homogenizing plate to change their positions and redistribute them evenly in the liquid layer, so that the homogenizing plate can always maintain a high mixing efficiency for materials at different depths.

[0037] By setting a deformable elastic drag reducing sheet, when the homogenizing plate encounters greater resistance during rotation, the elastic teeth are deformed to expand the size of the center hole of the elastic drag reducing sheet. The elastic drag reducing sheet adaptively changes the center hole, thereby keeping the resistance encountered by the homogenizing plate during stirring relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A three-dimensional diagram of a mixing device for preparing a composite lubricating material according to the present invention;

[0039] Figure 2 For the present invention Figure 1 Other perspectives of

[0040] Figure 3 A top view of a mixing device for preparing a composite lubricating material according to the present invention;

[0041] Figure 4 For the present invention Figure 3 Sectional view at AA;

[0042] Figure 5 A three-dimensional diagram of a stirring frame and related components of a mixing device for preparing a composite lubricating material according to the present invention;

[0043] Figure 6 It is a cross-sectional view of a homogenizing barrel in a mixing device for preparing a composite lubricating material of the present invention;

[0044] Figure 7 It is a front view of the elastic drag reducing sheet in the mixing device for preparing the composite lubricating material of the present invention;

[0045] Figure 8 This is a structural diagram of the discharge chamber and related components in the mixing device for preparing the composite lubricating material of the present invention;

[0046] Fig. 9 This is a diagram showing the position changes of each homogenizing plate when the liquid level changes in the mixing device for preparing the composite lubricating material of the present invention.

[0047] In the figure:

[0048] 1. Homogenizing barrel; 2. Barrel cover; 3. Motor bracket; 4. Driving motor 1; 5. Stirring shaft; 6. Stirring frame; 7. Sliding groove; 8. Spring; 9. Upper homogenizing plate; 10. Middle homogenizing plate; 11. Lower homogenizing plate; 12. Sliding column; 13. Connecting rod 1; 14. Through hole; 15. U-shaped sliding rod; 16. Connecting block; 17. Through groove; 18. Buoyancy plate; 19. Connecting rod 2; 20. Scraper; 21. Solid inlet; 22. Liquid inlet; 23. Drag reduction hole; 24. Elastic drag reduction sheet; 25. Crack; 26. Elastic tooth; 27. Driving motor 2; 28. Discharging chamber; 29. ​​Discharging tooth; 30. Discharging pipe; 31. Filter screen; 32. Valve; 33. Reflux pipe; 34. Barrel support; 35. Support leg. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0050] Example 1, reference Figure 1-Figure 9 , which is the first embodiment of the present invention, provides a mixing device for preparing a composite lubricating material, comprising a homogenizing barrel 1, a barrel cover 2 arranged at the opening of the homogenizing barrel 1, a motor bracket 3 arranged on the barrel cover 2, a driving motor 4 arranged on the motor bracket 3, and a stirring shaft 5 connected to the main shaft of the driving motor 4, the stirring shaft 5 passes through the barrel cover 2 and extends to the bottom of the homogenizing barrel 1, and a stirring unit is arranged on the stirring shaft 5; the stirring unit comprises a mouth-shaped stirring frame 6 arranged on the stirring shaft 5, sliding grooves 7 are provided in the vertical bars on both sides of the stirring frame 6, and a spring 8 is provided at the top of the sliding groove 7, and an upper homogenizing plate 9, a middle homogenizing plate 10 and a lower homogenizing plate 11 are symmetrically arranged along the stirring shaft 5, and the edges of the upper homogenizing plate 9 and the lower homogenizing plate 11 are fixedly connected with sliding columns 12, and the sliding columns 12 are arranged in the sliding groove 7, and the lower homogenizing plate 11 is fixed in the sliding groove through the sliding columns 12 7, the upper homogenizing plate 9 slides along the sliding groove 7 through the sliding column 12, the middle homogenizing plate 10 and the upper homogenizing plate 9 and the lower homogenizing plate 11 are hinged with a connecting rod 13, the middle homogenizing plate 10 is horizontally provided with two groups of through holes 14, a pair of U-shaped slide bars 15 slide through the through holes 14 of the middle homogenizing plate 10 on both sides of the stirring shaft 5, and the U-shaped slide bars 15 in symmetrical positions are connected by a connecting block 16, the stirring shaft 5 is provided with a through groove 17 that penetrates left and right, the connecting block 16 slides vertically in the through groove 17, a buoyancy plate 18 is slidably sleeved on the stirring shaft 5, and a connecting rod 2 19 is hinged between the buoyancy plate 18 and the upper homogenizing plate 9 in a symmetrical position; when the homogenizing barrel 1 is filled with liquid, the buoyancy plate 18 floats on the liquid, the spring 8 is in a compressed state, and the upper homogenizing plate 9, the middle homogenizing plate 10 and the lower homogenizing plate 11 are equidistantly distributed in the liquid layer.

[0051] Specifically, the stirring shaft 5 is fixedly connected to the middle position of the stirring frame 6, the upper homogenizing plate 9, the middle homogenizing plate 10 and the lower homogenizing plate 11 are all square, which increases the stirring area, the edges are rounded, and the stress is reduced. The lengths of the several connecting rods 13 connecting the upper homogenizing plate 9, the middle homogenizing plate 10 and the lower homogenizing plate 11 are equal. It is worth noting that the size of each homogenizing plate (hereinafter referred to as the homogenizing plate is the upper homogenizing plate 9, the middle homogenizing plate 10 and the lower homogenizing plate 11) and the connecting rod are not limited to those shown in the drawings, and can be adjusted according to actual conditions; when the homogenizing barrel 1 is filled with liquid, the buoyancy plate 18 is lifted by the buoyancy, and the buoyancy plate 18 is connected to the connecting rod 19 The upper homogenizing plate 9 is driven to rise, and the upper homogenizing plate 9 drives the middle homogenizing plate 10 and the lower homogenizing plate 11 to rise at equal intervals through several connecting rods 13; when liquid is discharged, the liquid level in the homogenizing barrel 1 drops, the buoyancy plate 18 drops, and the buoyancy plate 18 drives the upper homogenizing plate 9 to drop through the connecting rod 2 19, and the upper homogenizing plate 9 drives the middle homogenizing plate 10 and the lower homogenizing plate 11 to drop at equal intervals through several connecting rods 13, and the middle homogenizing plates 10 in symmetrical positions slide relative to each other; no matter how the liquid level changes, the upper homogenizing plate 9, the middle homogenizing plate 10 and the lower homogenizing plate 11 are always equidistantly distributed in the liquid layer, so that the several homogenizing plates can always efficiently stir and mix the liquid.

[0052] By hingedly connecting the upper homogenizing plate 9, the middle homogenizing plate 10 and the lower homogenizing plate 11 in sequence and floating the upper homogenizing plate 9 on the surface of the liquid layer, when the liquid layer in the homogenizing barrel 1 changes, the buoyancy plate 18 drives the upper homogenizing plate 9, the middle homogenizing plate 10 and the lower homogenizing plate 11 to change their positions and redistribute them evenly in the liquid layer, so that the homogenizing plate always maintains a high mixing efficiency for materials at different depths.

[0053] Reference Figure 4 Scrapers 20 are arranged on the vertical bars and the bottom bars on both sides of the stirring frame 6, and the scrapers 20 are in contact with the inner wall of the homogenizing barrel 1.

[0054] Specifically, a scraper 20 is arranged on the bottom horizontal bar of the mixing frame 6, a scraper 20 is arranged on one of the vertical bars of the mixing frame 6, two scrapers 20 are arranged on the other vertical bar, and the scrapers 20 on the vertical bars on both sides are staggered.

[0055] By providing a plurality of scrapers 20, the materials adhering to the inner wall of the homogenizing barrel 1 are scraped off and merged into the liquid material.

[0056] Reference Figure 1 The barrel cover 2 is provided with a solid feed inlet 21 and a liquid feed inlet 22 .

[0057] By adopting the above solution, different feeding ports are provided for the solid material and the liquid material respectively, so that the solid material can be more evenly dispersed in the liquid when being put in.

[0058] Reference Figure 5 A plurality of drag reduction holes 23 are provided on the upper homogenizing plate 9 , the middle homogenizing plate 10 and the lower homogenizing plate 11 .

[0059] By providing the drag reducing holes 23, the resistance encountered by the homogenizing plate when rotating in the liquid can be reduced, thereby reducing the load of the motor or the driving device and improving the stirring efficiency; the drag reducing holes 23 can promote the flow of the liquid on both sides of the homogenizing plate, making it easier for the liquid to pass through the homogenizing plate, thereby enhancing the stirring effect and promoting the circulation and mixing of the liquid;

[0060] The drag reducing holes 23 can reduce the force on the homogenizing plate, thereby reducing the risk of deformation of the homogenizing plate and extending its service life.

[0061] Reference Figure 6-Figure 7 Elastic drag reducing sheets 24 are arranged on the upper homogenizing plate 9, the middle homogenizing plate 10 and the lower homogenizing plate 11. A hole is opened in the center of the elastic drag reducing sheet 24, and cracks 25 are evenly distributed from the hole wall to the edge of the elastic drag reducing sheet 24 to form a plurality of elastic teeth 26.

[0062] Specifically, the elastic drag reducing sheet 24 is annular, and its thickness gradually becomes thinner from the edge to the center. When the stirring speed of the homogenizing plate increases or the viscosity of the material increases, the resistance to the homogenizing plate increases, and the elastic teeth 26 deform in the direction opposite to the stirring direction, allowing more liquid to flow through the elastic drag reducing sheet 24, thereby reducing the load on the homogenizing plate.

[0063] By providing a deformable elastic drag reducing sheet 24, when the homogenizing plate encounters greater resistance during rotation, the elastic teeth 26 are deformed to expand the size of the center hole of the elastic drag reducing sheet 24. The elastic drag reducing sheet 24 adaptively changes the center hole, thereby keeping the resistance encountered by the homogenizing plate relatively stable during stirring.

[0064] Reference Figure 8 A driving motor 27 is provided at the bottom of the homogenizing barrel 1, and a discharge chamber 28 is connected to the bottom of the homogenizing barrel 1. A discharge tooth 29 is provided on the main shaft of the driving motor 27, a discharge pipe 30 is provided on the side wall of the discharge chamber 28, and a filter screen 31 is provided between the discharge tooth 29 and the discharge chamber 28.

[0065] Specifically, the filter screen 31 is annular and closely attached to the discharge teeth 29 . The rotation of the discharge teeth 29 can cooperate with the filter screen 31 to disperse the agglomerated solid particles. At the same time, the discharge teeth 29 drive the material to rotate to generate centrifugal force, and use the centrifugal force to throw the material out of the discharge pipe 30 .

[0066] The mixed material subjected to centrifugal force is discharged from the discharge pipe 30 by the rotation of the discharge teeth 29 . Meanwhile, the filter screen 31 is provided to prevent agglomerated materials from being discharged from the discharge pipe 30 .

[0067] Reference Figure 2A valve 32 is provided at the end of the discharge pipe 30 , and a reflux pipe 33 is connected to the discharge pipe 30 . The other end of the reflux pipe 33 is connected to the homogenizing barrel 1 from the top of the side wall of the homogenizing barrel 1 .

[0068] Specifically, when the valve 32 is closed, the material in the discharge chamber 28 flows back to the homogenizing barrel 1 through the reflux pipe 33 for stirring, and when the valve 32 is opened, the material in the discharge chamber 28 is discharged through the discharge pipe 30 .

[0069] By providing the reflux pipe 33, the lower layer of mixed materials in the homogenizing barrel 1 can be refluxed to the upper layer of the liquid surface, so that the lower layer materials and the upper layer materials can be fully blended, thereby improving the stirring effect.

[0070] Reference Figure 1 A barrel support 34 is provided at the bottom of the homogenizing barrel 1 , and a plurality of legs 35 are connected to the bottom of the barrel support 34 .

[0071] The barrel support 34 and the legs 35 are provided to increase the stability of the entire device.

[0072] Working principle of the present invention:

[0073] When the homogenizing barrel 1 is filled with liquid, the buoyancy plate 18 rises due to the buoyancy force, and the buoyancy plate 18 drives the upper homogenizing plate 9 to rise through the connecting rod 2 19, and the upper homogenizing plate 9 drives the middle homogenizing plate 10 and the lower homogenizing plate 11 to rise at equal intervals through several connecting rods 1 13; when liquid is discharged, the liquid level in the homogenizing barrel 1 drops, the buoyancy plate 18 drops, and the buoyancy plate 18 drives the upper homogenizing plate 9 to drop through the connecting rod 2 19, and the upper homogenizing plate 9 drives the middle homogenizing plate 10 and the lower homogenizing plate 11 to drop at equal intervals through several connecting rods 1 13, and the middle homogenizing plate 10 in a symmetrical position slides relative to each other; no matter how the liquid level changes, the upper homogenizing plate 9, the middle homogenizing plate 10 and the lower homogenizing plate 11 are always equidistantly distributed in the liquid layer, so that the several homogenizing plates can always efficiently stir and mix the liquid.

[0074] In a stirring device, no matter how the liquid level changes, always keeping multiple homogenizing plates equidistantly distributed in the liquid has the following advantages:

[0075] Uniform stirring effect: The evenly spaced homogenizing plates can produce uniform stirring in the entire liquid area, avoiding dead zones or over-stirring in local areas and ensuring the uniformity of the mixture;

[0076] Improve mixing efficiency: The homogenizing plates in the liquid are evenly distributed, which can effectively reduce energy waste, improve stirring efficiency, make the flow of the entire liquid more orderly, and help accelerate the mixing process;

[0077] Stable liquid flow: The equidistant distribution of the homogenizing plates can maintain the stable flow of the liquid, avoiding eddy currents or liquid laminar flow caused by uneven local stirring intensity, thereby ensuring the stability of the mixing process;

[0078] Reduce wear and maintenance: The lower homogenizing plate is always in contact with the liquid and has a large load, while the upper homogenizing plate is in a state of no load when the liquid level drops. The homogenizing plate that is evenly distributed to adapt to the change of the liquid level reduces the unbalanced load of the mechanical part, reduces the wear and maintenance requirements of the equipment, and extends the service life of the equipment;

[0079] Adapt to different liquid levels: Regardless of the liquid level, the equidistant distribution of the homogenizing plates ensures consistent stirring intensity throughout the liquid volume, avoiding uneven mixing when the liquid level changes.

[0080] Embodiment 2, the present invention provides a method for preparing a composite lubricating material, using a mixing device for preparing a composite lubricating material, comprising the following steps:

[0081] Step 1: using wet mixing, pouring industrial alcohol into a homogenizing barrel 1, adding nano silicon nitride to the industrial alcohol, stirring evenly, then sequentially adding polyimide, graphite and carbon fiber, fully mixing evenly, and then filtering and drying; the composition and mass fraction of the composite lubricating material are 60% polyimide, 20% carbon fiber, 10% graphite, and 5% nano silicon nitride;

[0082] Step 2: Pour the mixed mold material into the mold for hot pressing at a molding temperature of 365°C and a pressure of 40MPa. Keep the temperature and pressure for 40 minutes and cool naturally.

[0083] The polyimide self-lubricating composite material prepared by this method has the characteristics of high mechanical strength, small friction coefficient, low wear rate, etc., and has good lubrication performance and mechanical properties. The friction coefficient of the polyimide material can be reduced by producing a thin and uniform transfer film on the contact surface, thereby improving the material's friction reduction and wear resistance and extending the material's service life.

[0084] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A mixing device for preparing a composite lubricating material, comprising a homogenizing barrel (1), a barrel cover (2) arranged at an opening of the homogenizing barrel (1), a motor bracket (3) arranged on the barrel cover (2), a driving motor (4) arranged on the motor bracket (3), and a stirring shaft (5) connected to the main shaft of the driving motor (4), wherein the stirring shaft (5) passes through the barrel cover (2) and extends to the bottom of the homogenizing barrel (1), and is characterized in that: The stirring shaft (5) is provided with a stirring unit; The stirring unit comprises a mouth-shaped stirring frame (6) arranged on the stirring shaft (5), sliding grooves (7) are provided in vertical bars on both sides of the stirring frame (6), and springs (8) are provided at the tops of the sliding grooves (7). An upper homogenizing plate (9), a middle homogenizing plate (10) and a lower homogenizing plate (11) are symmetrically arranged along the stirring shaft (5), and the edges of the upper homogenizing plate (9) and the lower homogenizing plate (11) are fixedly connected with sliding columns (12), and the sliding columns (12) are arranged in the sliding grooves (7). The lower homogenizing plate (11) is fixed to the bottom of the sliding grooves (7) through the sliding columns (12), and the upper homogenizing plate (9) slides along the sliding grooves (7) through the sliding columns (12). The middle homogenizing plate (10) and the upper homogenizing plate (11) are fixedly connected to the edges of the upper homogenizing plate (9) and the lower homogenizing plate (11). A connecting rod (13) is hinged between the upper homogenizing plate (9) and the lower homogenizing plate (11); two groups of through holes (14) are horizontally opened on the middle homogenizing plate (10); a pair of U-shaped sliding rods (15) slide through the through holes (14) of the middle homogenizing plate (10) on both sides of the stirring shaft (5); the U-shaped sliding rods (15) at symmetrical positions are connected through a connecting block (16); a through groove (17) is opened on the stirring shaft (5) and passes through the left and right sides; the connecting block (16) slides vertically in the through groove (17); a buoyancy plate (18) is slidably sleeved on the stirring shaft (5); and a connecting rod (19) is hinged between the buoyancy plate (18) and the upper homogenizing plate (9) at the symmetrical position; The upper homogenizing plate (9), the middle homogenizing plate (10) and the lower homogenizing plate (11) are all provided with elastic drag reducing plates (24), the elastic drag reducing plates (24) having a hole at the center, and cracks (25) distributed equidistantly from the hole wall to the edge of the elastic drag reducing plates (24), forming a plurality of elastic teeth (26); When liquid is poured into the homogenizing barrel (1), the buoyancy plate (18) floats on the liquid, the spring (8) is in a compressed state, and the upper homogenizing plate (9), the middle homogenizing plate (10) and the lower homogenizing plate (11) are equidistantly distributed in the liquid layer.

2. The mixing device for preparing a composite lubricating material according to claim 1, characterized in that: Scrapers (20) are provided on the vertical bars and the bottom bar on both sides of the stirring frame (6), and the scrapers (20) are in contact with the inner wall of the homogenizing barrel (1).

3. The mixing device for preparing a composite lubricating material according to claim 1, characterized in that: The barrel cover (2) is provided with a solid material inlet (21) and a liquid material inlet (22).

4. The mixing device for preparing a composite lubricating material according to claim 1, characterized in that: The upper homogenizing plate (9), the middle homogenizing plate (10) and the lower homogenizing plate (11) are all provided with a plurality of drag reducing holes (23).

5. The mixing device for preparing a composite lubricating material according to claim 1, characterized in that: A second drive motor (27) is disposed at the bottom of the homogenizing barrel (1), a discharge chamber (28) is connected through the bottom of the homogenizing barrel (1), a discharge tooth (29) is disposed on the main shaft of the second drive motor (27), a discharge pipe (30) is disposed on the side wall of the discharge chamber (28), and a filter screen (31) is disposed between the discharge tooth (29) and the discharge chamber (28).

6. The mixing device for preparing a composite lubricating material according to claim 5, characterized in that: A valve (32) is provided at the end of the discharge pipe (30), and a reflux pipe (33) is provided in communication with the discharge pipe (30), wherein the other end of the reflux pipe (33) is connected to the homogenizing barrel (1) from above the side wall of the homogenizing barrel (1).

7. The mixing device for preparing a composite lubricating material according to claim 1, characterized in that: A barrel support (34) is provided at the bottom of the homogenizing barrel (1), and a plurality of supporting legs (35) are connected to the bottom of the barrel support (34).

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