Anti-attrition self-repairing material and application of anti-attrition self-repairing material to industrial gearbox and bearing

Abstract

The invention relates to the technical field of tribology and materials, and discloses an anti-attrition self-repairing material and application of the anti-attrition self-repairing material to an industrial gearbox and a bearing. 20 to 30 parts of polypropylene; 3 to 6 parts of disulfide or sulfur; 1-2 parts of zinc oxide; the invention further provides a preparation method of the anti-attrition self-repairing material, and the preparation method comprises the following steps: pretreating the material; mixing and dispersing the materials; the invention further provides an application method of the anti-attrition self-repairing material on an industrial gearbox, and the anti-attrition self-repairing material is mixed with industrial gearbox lubricating oil to form a composite lubricant for use. By optimizing a particle dispersion technology and introducing catalytic components and a composite supporting frame design, stable formation of a lubricating film and a dynamic damage self-repairing function under a high-load working condition are realized, and the performance and the service life of equipment are greatly improved.

Description

Technical Field

[0001] The invention relates to the field of tribology and material technology, in particular to a friction-reducing self-repairing material and application thereof to industrial gear boxes and bearings. Background Art

[0002] In the long-term operation of industrial equipment, friction and wear are difficult problems that cannot be ignored. Especially in mechanical systems such as industrial gearboxes, where parts are in high-load, high-speed working conditions for a long time, the energy loss and wear caused by friction have a huge impact on the reliability and service life of the equipment. Not only that, these problems will also lead to frequent maintenance and replacement of parts of the equipment, resulting in high economic costs and waste of resources. In order to reduce the friction coefficient, reduce wear, and achieve self-repair of damage during dynamic operation, anti-friction materials have become an urgent need in the machinery industry.

[0003] Existing lubrication technologies have alleviated the problem of friction and wear to a certain extent. Many technologies form a lubricating film at the friction interface by adding lubricating oil or grease, thereby reducing the friction coefficient and reducing the wear of parts. At the same time, some solid lubricants (such as molybdenum disulfide, graphite, etc.) are widely used in lubricating oils to improve lubrication performance. These technologies perform relatively well under conventional load and speed conditions, extending the maintenance cycle of equipment. In addition, some new lubrication technologies have also improved the adaptability and high temperature resistance of lubricating materials through the introduction of polymer materials and nanoparticles.

[0004] However, existing technologies have shown many shortcomings when facing more complex and demanding working conditions. First, lubricating particles are often difficult to disperse evenly in lubricating oil, and are prone to agglomeration or sedimentation, resulting in uneven distribution of lubrication effects on the interface and increasing the possibility of local wear. In addition, these lubricating materials can usually only slow down wear, but lack dynamic repair capabilities. After the damage to the friction interface accumulates, it cannot be spontaneously repaired by the lubricant, and the equipment still needs to be shut down for maintenance or replacement of parts. In high-speed and high-load environments, the adhesion of the lubricating film is insufficient and it is difficult to maintain it on the friction interface for a long time, which can easily lead to lubrication failure. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a friction-reducing self-repairing material and its application in industrial gear boxes and bearings, which solves the problems of poor dispersion of lubricating particles, insufficient stability of lubricating films and lack of dynamic repair capabilities in the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a friction-reducing self-repairing material, the friction-reducing self-repairing material comprising: Ethylene propylene rubber: 35-45 parts; The elastic modulus and low glass transition temperature (below -40°C) of EPDM rubber enable it to remain flexible under dynamic friction conditions, and adaptively fill wear gaps through micro-deformation, enhancing the material's repair ability; Polypropylene: 20-30 parts; The crystalline structure of polypropylene gives it high wear resistance. At the same time, during the friction process, the oxide layer formed on its surface has a certain lubricating effect, which helps to reduce the friction coefficient. In addition, the low density of polypropylene gives the material good dispersion stability in lubricating oil; Disulfide or sulfur: 3-6 parts; The formation of the vulcanized network not only improves the wear resistance of the material, but also enhances the dynamic self-repairing ability of the base material. During the friction process, the molecular chains of the vulcanized rubber fill the micro cracks through the recovery effect of the cross-linking points, delaying the crack propagation; Zinc oxide: 1-2 parts; Zinc oxide promotes the uniform formation of sulfur crosslinks during the vulcanization process, ensuring the mechanical properties and elastic stability of the base material. During the friction process, zinc oxide can also form a protective oxide film on the surface of the material, which helps to reduce the direct contact between the metal and the material interface and further reduce wear; Magnesium aluminum layered double hydroxide: 4-6 parts; During the friction process, the Mg-AlLDH sheets can be arranged along the friction direction to form a sliding plane, which significantly reduces the friction resistance. At the same time, a dynamic ion exchange reaction occurs between the hydroxyl groups on its surface and the lubricating components, allowing the repair components to quickly fill the worn area and generate a new protective layer. Cobalt aluminum layered double hydroxide: 2-3 parts; Co-AlLDH provides an electron migration path for the repair component through redox reaction, accelerating the formation of the repair layer. At the same time, its layer structure remains stable under high temperature and high pressure friction environment, enhancing the hardness and adhesion of the repair layer; Cerium oxide: 2-4 parts; Cerium Oxide Ce 3+ / Ce 4+ The redox pair enables it to capture the oxidation stress generated by the friction interface, while the generated oxides further fill the worn surface to form a high-hardness ceramic repair layer. This ceramic layer can significantly improve the wear resistance and oxidation resistance of the interface; Titanium oxide: 1-2 parts; Under high temperature friction conditions, TiO2 particles enhance the hardness of the repair layer through filling, and their photocatalytic properties can decompose the carbonized residues produced by friction, keeping the surface clean and active; Molybdenum disulfide particles: 4-6 parts; During the friction process, the MoS2 flakes slide along the shear direction, reducing the friction resistance; at the same time, its surface chemical inertness prevents oxidation or chemical reaction, ensuring the stability of the lubricating layer; Polystyrene: 3-5 parts; The rigid particles of polystyrene enhance the overall strength of the material through the composite support structure, and at the same time play a skeletal support role in the lubrication network, helping the material maintain the lubrication effect under friction conditions; Polydimethylsiloxane: 5-7 parts; PDMS forms a continuous lubrication network on the friction surface. Its flexible structure can absorb the impact caused by friction and improve the stability of the lubrication framework through the composite effect with polystyrene. Sodium dihydrogen phosphate: 1-2 parts; During the friction process, phosphate reacts with the metal surface under high temperature to form strongly bonded phosphate compounds, while optimizing the thickness and hardness of the repair layer to prevent the repair layer from peeling off.

[0007] The present invention also provides a method for preparing a friction-reducing self-repairing material, comprising the following steps: S1. Pretreatment of materials; Pretreatment can avoid the introduction of microscopic bubbles or uneven cross-linking during the vulcanization process, while improving the compatibility of the base material with other components; S2. Mixing and dispersion of materials; Through mixing and dispersing, the matrix material, catalyst and lubricating particles are initially distributed, and ethanol is used as a medium to reduce particle agglomeration. The cavitation effect of ultrasound can further deagglomerate the particles and form a uniformly distributed suspension, thereby ensuring the uniformity of the internal structure of the composite material. S3, hot pressing of materials; Appropriate temperature and pressure enable the matrix material to be fully cross-linked to form a stable three-dimensional network structure, while ensuring that the catalyst and lubricating particles are evenly distributed, enhancing the mechanical strength and lubrication properties of the material; S4, drying of materials; Reduce the bubbles or residual solvent content inside the material under vacuum environment to ensure the chemical stability and internal uniformity of the material.

[0008] Preferably, the pretreatment of the material comprises: The ethylene-propylene rubber and the polypropylene are dried separately according to the weight ratio range, and dried at a temperature of 50 to 70°C for 2 to 4 hours; Drying removes moisture and volatile organic compounds (VOC) in the matrix material, avoiding bubbles or pores during molding, thereby ensuring the density and mechanical properties of the material. After drying, the molecular chain of the matrix material is more stable, which helps to form a uniform three-dimensional network structure in the subsequent vulcanization and hot pressing molding process; The magnesium aluminum layered double hydroxide is dispersed in deionized water, with an ultrasonic power of 50 to 100 W and a dispersion time of 20 to 40 minutes; Through ultrasonic dispersion, the lamellar stacking state of magnesium aluminum double hydroxide is depolymerized by cavitation effect to form a single lamellar or few-lamellar structure with a high surface area, thereby improving its catalytic activity; Improve the efficiency of the repair reaction: the sheet material is arranged along the shear direction during the friction process, which can reduce the cross-sectional friction coefficient. At the same time, the hydroxyl groups on its surface promote the repair process of the material through dynamic ion exchange reaction; The cerium oxide and titanium oxide are obtained by calcination, the calcination temperature is 400-600°C, and the calcination time is 2-4 hours; Through high-temperature calcination, cerium oxide and titanium oxide form a stable crystalline phase (such as the cubic fluorite structure of CeO2), ensuring its stability under high-load friction environment; during the calcination process, the surface activity of the material and the exposure of the catalytic sites are significantly improved by removing organic matter or impurities in the precursor.

[0009] Preferably, the pretreatment of the material further comprises: The mixture of magnesium aluminum layered double hydroxide and cobalt aluminum layered double hydroxide is activated after dispersion, and the activation step comprises: the mixture of magnesium aluminum layered double hydroxide and cobalt aluminum layered double hydroxide has a typical layered structure, and ultrasonic dispersion can use cavitation effect to break the agglomeration state of the lamellar layer to form a single lamellar or few-lamellar structure with high surface area; The dispersed mixture is placed in a deionized water solution at 80 to 100° C. and stirred for 20 to 40 minutes; Under high temperature stirring conditions of 80-100°C, the interlayer structure of magnesium-aluminum and cobalt-aluminum LDH expands, the interlayer distance increases, more active sites are exposed, and more reaction channels are provided for subsequent catalytic reactions. Sodium dihydrogen phosphate can be dissociated in aqueous solution into The addition of can stabilize the sheet structure and prevent the sheet from collapsing or agglomerating during subsequent operations; During the stirring process, 0.5 to 1.5 parts of sodium dihydrogen phosphate are added to the solution as a stabilizer to further enhance its catalytic performance; the activated mixture sheet has a larger specific surface area and a higher cation exchange capacity, thereby achieving rapid ion exchange and dynamic generation of repair materials in the repair reaction.

[0010] Preferably, the mixing and dispersing of the materials comprises: Add the friction-reducing self-repairing material into a mixing tank according to the weight ratio; The polarity of ethanol can effectively wet the surface of particles and reduce the interfacial tension between particles, thereby enhancing the uniformity of particles in the mixed system and promoting the efficiency of subsequent ultrasonic dispersion; Adding ethanol as a dispersion medium, the weight ratio of ethanol to the total components is 1.5 to 2.5; The polarity of ethanol can effectively wet the surface of particles and reduce the interfacial tension between particles, thereby enhancing the uniformity of particles in the mixed system and promoting the efficiency of subsequent ultrasonic dispersion; The stirring speed is controlled at 300-500 rpm and the stirring time is 15-30 minutes; By properly controlling the stirring speed (300-500 rpm) and time (15-30 minutes), excessive stirring can be avoided to prevent particle sedimentation or stratification, while forming a stable suspension, providing a good pretreatment basis for subsequent ultrasonic dispersion; The mixed components are placed in an ultrasonic dispersion device with an ultrasonic power of 40 to 80 W and a dispersion time of 10 to 20 minutes. The sound waves form a cavitation effect in the dispersion liquid, resulting in periodic bursting of tiny bubbles. This process can effectively destroy the agglomeration state of the particles, so that the magnesium-aluminum and cobalt-aluminum layered double hydroxides, lubricating particles (molybdenum disulfide) and other components are evenly distributed in the matrix material.

[0011] Preferably, the mixing and dispersing of the materials further comprises the following steps: The dispersion medium is ethanol or deionized water, and the mixing ratio is 1:1 to 3:1 by volume; Among them, the low volume ratio (1:1) is suitable for solid components with larger particles to prevent dilution from affecting the dispersion effect; the high volume ratio (3:1) is suitable for components with smaller particle sizes and easy to agglomerate, providing better dispersion ability; Adding a surfactant to the mixed solution, wherein the surfactant is sodium dodecylbenzene sulfonate, and the mass ratio is 0.5-1% of the total mass of the solution; Sodium dodecylbenzene sulfonate is an anionic surfactant, its molecular structure contains hydrophilic sulfonic acid group and hydrophobic alkyl chain: The hydrophilic group is adsorbed on the particle surface through electrostatic action, forming a negative charge protective shell to prevent electrostatic attraction between particles; the hydrophobic group acts on the interface between the dispersion medium and the particle surface to reduce the interfacial energy and improve the dispersion stability; After the dispersion treatment, the viscosity of the mixed system is monitored and controlled at 0.5-1.5 Pa·s. The viscosity is adjusted by increasing or decreasing the amount of dispersion medium to ensure the stability of the system. If the viscosity is too low (<0.5Pa·s), the particles are easy to settle or aggregate in the system, resulting in uneven dispersion. If the viscosity is too high (>1.5Pa·s), the fluidity of the system decreases, the particle dispersion process is restricted, and it is difficult to form a uniform suspension. By increasing or decreasing the amount of dispersion medium, the viscosity of the system can be adjusted to a reasonable range (0.5~1.5Pa·s) to ensure that the particles have good suspension stability and fluidity in the dispersion.

[0012] Preferably, the mixture of polystyrene and polydimethylsiloxane is a composite support structure, and the preparation method thereof comprises the following steps: Polystyrene is formed into micron-sized particles by melt extrusion, and the particle diameter is 0.5 to 1.5 μm; Polystyrene is a rigid polymer. The micron-sized particles formed after melt extrusion can provide high mechanical strength and dimensional stability for the composite support structure. The size control of the particles (0.5-1.5 μm) can ensure that the particles are evenly dispersed during the subsequent mixing process with polydimethylsiloxane and are effectively embedded in the support frame. Polydimethylsiloxane was prepared by the solution gel method, using ethanol as a solvent and diluted to a concentration of 10-20%; The flexible network of polydimethylsiloxane can form a lubricating protective film on the friction interface, significantly reducing friction resistance and forming complementary properties with the rigid skeleton of polystyrene; Adding polystyrene particles to the polydimethylsiloxane solution, mixing in a mass ratio of 1:1 to 1:2, and stirring at 60 to 80° C. for 15 to 30 minutes to form a uniform composite support structure; The polystyrene particles provide support and pressure resistance as a rigid skeleton, while the polydimethylsiloxane flexible network can absorb friction impact, achieving complementary mechanical properties; the synergistic effect of rigidity and flexibility significantly improves the fatigue resistance and dynamic adaptability of the composite support structure; The composite structure is blended with other components through hot pressing technology to form a wear-reducing self-healing material with a flexible support frame. During the hot pressing process, the interlocking of the polydimethylsiloxane flexible network and the polystyrene particles is further strengthened to form a composite support frame with high strength and high flexibility. The rigid polystyrene particles provide compressive and wear resistance, preventing excessive compression of the material under friction conditions. The polydimethylsiloxane flexible network provides dynamic deformation capability, which can absorb friction energy and disperse stress, thereby extending the service life of the material.

[0013] Preferably, during the molding process of the composite support structure, the flexible support frame is cross-linked with the matrix material through intermolecular forces, and finally forms a continuous lubricating network; The polystyrene particles are wetted by the ethanol medium and, while combining with the flexible polydimethylsiloxane, form a preliminary physical adsorption effect with the polar segments of the matrix material (such as the double bonds of ethylene-propylene rubber). The rigid polystyrene particles of the composite support structure are evenly dispersed through the fluidity of the matrix material, and the flexible polydimethylsiloxane is gradually embedded in the matrix network, providing a preliminary bonding basis for subsequent cross-linking.

[0014] Preferably, the drying process of the material includes: Use a vacuum drying oven, the drying temperature is controlled at 50-70°C, the drying time is 2-5 hours, and the vacuum degree of the drying environment is -0.08--0.1MPa; This temperature range is suitable for heat-sensitive materials (such as polydimethylsiloxane in the flexible support frame and ethylene propylene rubber in the matrix material), ensuring that the material maintains its original physical properties and chemical structure during the drying process; the negative pressure environment enhances the evaporation rate of water and solvents, while avoiding defects such as cracking and uneven shrinkage of particles or sheets due to too fast drying; After drying, the material is cooled to room temperature, and granular materials with a particle size of 1 to 3 mm are screened out for mixing with lubricating oil. The dried material is still at a relatively high temperature. If it is directly exposed to room temperature, it may cause internal defects or surface cracks in the particle structure due to thermal expansion and contraction. The slow cooling process helps to gradually release the internal stress of the material, ensuring the mechanical integrity of the particles and the flatness of the sheet. Particles with a particle size range of 1 to 3 mm have the best dispersion performance in lubricating oil, which can provide sufficient friction reduction and avoid the reduction of lubrication effect due to agglomeration of too small particles. For sheet materials, place them in a constant temperature box at 40-50°C for further leveling for 1-2 hours to ensure uniform thickness of the material; The constant temperature treatment controls the softening temperature range of the sheet between 40 and 50°C, allowing the internal molecular chains to reach dynamic equilibrium and gradually eliminate internal residual stress. This process avoids further deformation that may occur under high temperature conditions and prevents hardening or increased brittleness under low temperature conditions.

[0015] The present invention also provides an application method of the friction-reducing self-repairing material on an industrial gearbox and a bearing. The friction-reducing self-repairing material is mixed with an industrial gearbox lubricant to form a composite lubricant for use. The preparation method of the composite lubricant comprises: Adding the anti-friction self-repairing material into the lubricating oil at a weight ratio of 1:20 to 1:50; In high-load and high-wear environments, increasing the proportion of anti-friction self-repairing materials can improve the anti-friction and repairing properties of lubricants and extend the service life of gearboxes. In medium and low-load conditions, appropriately reducing the proportion can both meet performance requirements and save material costs. Under the condition of 50-70°C, the friction-reducing self-repairing material and the lubricating oil are stirred evenly by a magnetic stirrer for 1-2 hours; Heating the lubricating oil to 50-70°C can reduce the viscosity of the lubricating oil and improve the dispersion efficiency of the material; at the same time, heating can activate the repair components (such as magnesium-aluminum layered double hydroxide and cerium oxide) in the anti-friction self-repairing material and improve its activity; the high-speed rotation of the magnetic stirrer generates a strong shear force, which makes the anti-friction self-repairing material evenly dispersed in the lubricating oil to form a stable suspension system and avoid particle sedimentation or agglomeration; Inject the prepared composite lubricant into the gearbox lubrication system, and run the gearbox at a low speed for 10 to 20 minutes to ensure that the material is evenly distributed inside and at the bearings; In the lubrication system, the composite lubricant circulates to cover the gear contact surface with the anti-friction self-repairing material. Uniform distribution ensures that the material fully exerts its anti-friction and repairing effects in the entire gear contact area, avoiding aggravation of local wear. Low-speed operation provides sufficient time and low shear stress for the lubricating particles (such as molybdenum disulfide) in the anti-friction self-repairing material to form an initial lubricating film on the gear surface.

[0016] The present invention provides a friction-reducing self-repairing material and its application in industrial gear boxes and bearings. It has the following beneficial effects: 1. The present invention adopts a lubrication system based on a composite network of molybdenum disulfide particles and polydimethylsiloxane, which significantly reduces the friction coefficient. Compared with the use of a single lubricating particle in the prior art, the lubrication effect is more durable and evenly distributed, avoiding the problem of local friction aggravation. Through the dynamic lubrication effect of the flexible network, the present invention effectively solves the problem of lubrication failure of the gearbox under high load and high speed conditions.

[0017] 2. The present invention realizes dynamic repair of friction interface damage by utilizing the synergistic catalytic effect of catalytic components such as magnesium aluminum layered double hydroxide and cerium oxide. Compared with the technical solution of traditional materials that require shutdown for maintenance, the present invention triggers the repair reaction through friction heat, quickly fills the wear area during operation, avoids the problem of equipment wear failure that cannot be repaired in real time in the prior art, and greatly improves the mechanical life.

[0018] 3. The present invention constructs a unique composite support frame through the rigid-flexible combination of polystyrene and polydimethylsiloxane. This frame performs well in reducing pressure and dispersing friction stress, and enhances the material's compressive resistance. The support systems in the prior art are mostly single rigid or flexible designs, lacking the ability to adapt to complex friction environments. The present invention successfully makes up for the defects of deformation and failure of traditional frames in dynamic environments through the synergistic effect of composite supports.

[0019] 4. The present invention adopts ultrasonic dispersion and surfactant-assisted technology to evenly distribute the anti-friction self-repairing material in the lubricating oil. Compared with the problems of poor particle dispersion and easy sedimentation in the prior art, the long-term suspension ability of the material is significantly improved, and the performance of the lubricant is more stable. Combined with the low-speed initial operation mode, it ensures that the lubricant is fully and evenly distributed in the gearbox, solving the problems of incomplete coverage and increased local friction of traditional lubricating materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flow chart of the preparation method of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Please see attached Figure 1 : Example 1: Preparation and application of composite lubricant under high load conditions Specific steps: Material preparation Ethylene propylene rubber (40 parts) and polypropylene (25 parts) were mixed in proportion and dried in a vacuum drying oven for 4 hours at a temperature of 60° C. and a vacuum degree of -0.1 MPa.

[0023] Magnesium aluminum layered double hydroxide (5 parts) and cobalt aluminum layered double hydroxide (3 parts) were ultrasonically dispersed at a power of 80 W for 30 minutes. After dispersion, sodium dihydrogen phosphate (1 part) was added and stirred at 90° C. for 20 minutes for activation treatment.

[0024] After surface modification, molybdenum disulfide particles (5 parts) were mixed with cerium oxide (3 parts) and titanium oxide (2 parts) for later use.

[0025] Preparation of composite lubricants The anti-friction self-repairing material prepared above was added into lubricating oil (the lubricating oil model was industrial gear oil 150#) at a weight ratio of 1:20.

[0026] At 50°C, stir with a magnetic stirrer for 1.5 hours to ensure that the materials are evenly dispersed to form a stable composite lubricant.

[0027] Gearbox Application Inject the compound lubricant into the gearbox lubrication system and rotate it at a low speed (100 rpm) for 15 minutes before operation to ensure that the lubricant covers all contact surfaces. Then run it at the rated speed (800 rpm) and observe and record the gear wear status.

[0028] Example 2: Dynamic repair capability verification Specific steps: Support structure preparation Polystyrene was formed into particles by melt extrusion, and the diameter was controlled to be 1.0 μm.

[0029] Polydimethylsiloxane was prepared by the solution gel method, where PDMS was diluted to a concentration of 15% and heated at 60 °C to form a flexible network.

[0030] The polystyrene particles were mixed with the PDMS solution in a mass ratio of 1:1 and stirred for 25 min to form a composite support frame.

[0031] Friction-reducing material synthesis The composite support frame (10 parts) is mixed with molybdenum disulfide (4 parts), magnesium aluminum layered double hydroxide (6 parts), and cerium oxide (2 parts).

[0032] Lubricating oil was added and dispersed using an ultrasonic disperser at a power of 60 W for 20 minutes. The dispersed material particles were uniform without obvious agglomeration.

[0033] Friction test The composite material was coated on the friction pair of the gear test bench and subjected to a loading test with a load of 1200N, a rotation speed of 500rpm, and a continuous operation of 50 hours.

[0034] Example 3: Uniform lubrication performance under complex friction environment Specific steps: Particle and lubricant dispersion The anti-friction self-repairing material (particle diameter 1-3 mm) is added into the lubricating oil at a ratio of 1:30. The lubricating oil model is 220# industrial lubricating oil.

[0035] 0.5% sodium dodecylbenzene sulfonate was added as a surfactant, and the mixture was stirred at 60° C. for 20 minutes using a magnetic stirrer.

[0036] After stirring, the mixture was dispersed using an ultrasonic disperser for 10 min with a power of 50 W and a viscosity controlled at 1.2 Pa·s to ensure that the suspension was stable.

[0037] Lubrication system testing The lubricating oil is injected into the gearbox, and after running at a low speed for 10 minutes, the speed is gradually increased to 1000rpm, and the running time is 24 hours.

[0038] Observe the circulation status of the lubricating oil and record the thickness of the lubricating film on the friction surface.

[0039] Comparative Example 1: Comparison with Example 1 (composite lubricant under high load conditions) Preparation process of comparative example 1: Preparation of anti-friction self-repairing materials: According to Example 1, ethylene-propylene rubber (40 parts) and polypropylene (25 parts) were dried.

[0040] Magnesium aluminum layered double hydroxide (5 parts) and cobalt aluminum layered double hydroxide (3 parts) were ultrasonically dispersed, but the addition of sodium dihydrogen phosphate was omitted and no activation treatment was performed.

[0041] Molybdenum disulfide particles were directly mixed with cerium oxide (3 parts) and titanium oxide (2 parts) without surface modification to obtain the initial material.

[0042] Preparation of composite lubricant: Add the anti-friction self-repairing material into the lubricating oil at a weight ratio of 1:20.

[0043] The mixture was stirred at room temperature (about 25° C.) for 30 minutes without heating or stirring.

[0044] A composite lubricant that was not uniformly dispersed was obtained.

[0045] Comparative Example 2: Comparison with Example 2 (Dynamic Repair Capability Verification) Preparation process of comparative example 2: Composite support frame preparation: The polystyrene particles are prepared by melt extrusion, and the particle diameter is not strictly controlled (particles with a particle diameter of 2 to 5 μm exist).

[0046] The concentration of polydimethylsiloxane was diluted to 25%, which is higher than 15% in the embodiment, to form a low viscosity solution.

[0047] The polystyrene particles and PDMS were mixed in a mass ratio of 1:3, and the stirring time was shortened to 10 min to form a thinner suspension.

[0048] Friction-reducing material synthesis: The above support framework was directly mixed with the catalyst particles (magnesium aluminum layered double hydroxide and cerium oxide), but without using molybdenum disulfide to lubricate the particles.

[0049] A low proportion of lubricating material was obtained, which was not strictly dispersed.

[0050] Comparative Example 3: Comparison with Example 3 (Uniform Lubrication Performance under Complex Friction Environment) Preparation process of comparative example 3: Materials and lubricant dispersion: When the anti-friction self-repairing material is added to the lubricating oil at a weight ratio of 1:50, the ratio is significantly reduced.

[0051] Sodium dodecylbenzene sulfonate was not added as a surfactant.

[0052] The mixture was stirred at 50°C for 20 minutes using a magnetic stirrer, and the ultrasonic dispersion step was omitted.

[0053] Lubrication system applications: The lubricating oil was directly injected into the gearbox, and the low-speed operation time was shortened to 5 minutes, which did not fully ensure the uniformity of material distribution.

[0054] Comparative Example 4: Composite comparison between Example 1 and Example 2 Preparation process of comparative example 4: Preparation of anti-friction self-repairing materials: The magnesium aluminum layered double hydroxide and the cobalt aluminum layered double hydroxide were not used simultaneously, and only the magnesium aluminum layered double hydroxide (5 parts) was added, and the synergistic catalytic effect was ignored.

[0055] The concentration of polydimethylsiloxane was controlled at 5%, which was much lower than 15% in Example 2, and a flexible network was difficult to form.

[0056] The amount of molybdenum disulfide particles was reduced to 2 parts.

[0057] Preparation of composite lubricant: The mixing ratio of material to lubricant is fixed at 1:50, and the mixing time is shortened to 15 minutes.

[0058] No material activation and dispersion treatment was performed.

[0059] Comparative Example 5: Comparison of dispersion stability of Example 3 Preparation process of comparative example 5: Particle dispersion treatment: Deionized water was used as the dispersion medium (instead of ethanol) and mixed with the material in a 1:1 volume ratio.

[0060] The surfactant was omitted and the mixture was stirred directly using a magnetic stirrer for 15 minutes.

[0061] Lubricant preparation and application: Inject the mixed material directly into the lubricating oil at a ratio of 1:40.

[0062] The lubricant was injected directly into the gearbox lubrication system without ultrasonic dispersion treatment, and the running time was controlled within 5 minutes.

[0063] Experiment 1 Experimental objectives The anti-friction performance of the composite lubricant in Example 1 and Comparative Example 1 was tested, the friction coefficient performance of the two materials under high load conditions was compared, and the influence of the material formulation and preparation process on the anti-friction performance was analyzed.

[0064] Experimental procedures Experimental preparation: Use a four-ball friction tester to clean the ball seat and test steel ball (made of GCr15, 12.7 mm in diameter) to ensure that there is no oil or particle residue on the surface.

[0065] Prepare experimental samples: Example 1 Sample: Prepare the composite lubricant according to Example 1 at a ratio of 1:20, stir evenly and heat to 50° C. for use.

[0066] Comparative Example 1 Sample: The composite lubricant of Comparative Example 1 was prepared at a ratio of 1:20, but without catalyst activation and heating treatment.

[0067] Experimental setup: The load of the four-ball tester was set to 500N, the rotation speed to 1200rpm, and the test time to 30 minutes.

[0068] For each experiment, 20 ml of lubricant sample was added to ensure that the steel ball was completely immersed.

[0069] The real-time changes of the friction coefficient were recorded, data were collected every 10 minutes, and finally the wear scar diameter on the steel ball surface was observed.

[0070] Experimental steps: Start the equipment and run it to steady state.

[0071] The friction coefficient data was recorded, and after the experiment, the steel ball was taken out, cleaned, and the wear scar diameter was measured to observe the surface wear characteristics.

[0072] Repeat the above experiments to ensure the reproducibility of each set of data.

[0073] Comparative experimental data of friction coefficient and wear scar diameter between Example 1 and Comparative Example 1 This experiment clearly demonstrates the significant advantages of the material of the present invention in terms of friction reduction performance. The friction coefficient in Example 1 decreases rapidly and tends to stabilize, while the comparative example 1 always maintains a high level. The reason for this is that the magnesium-aluminum layered double hydroxide and the cobalt-aluminum layered double hydroxide in Example 1 that have been activated rapidly catalyze the generation of a ceramic protective layer under the action of friction heat. This protective layer is not only high in hardness, but also very smooth, and can effectively reduce the friction coefficient. In the comparative example, since the catalytic component is not activated and cannot react in time, the interface friction is still large; What is more interesting is that the lubricant of Example 1 exhibits obvious dynamic adaptability. As the friction time increases, the catalytic particles in the material generate a dense repair layer through ion exchange and redox reaction, filling the worn surface. This repair mechanism is intelligent and adaptive, especially under high load conditions, and preferentially acts on areas with more severe wear. This characteristic is completely missing in the comparative example, because the reaction efficiency of its catalyst is low, and the particles can only provide basic lubrication and cannot generate a repair layer; in addition, the comparison of wear marks in the experiment also intuitively reflects the outstanding performance of Example 1 in the friction reduction effect. The observed wear mark diameters are significantly different, and the wear marks of Example 1 are smaller, more uniform, and have a higher surface smoothness. This further illustrates that the activated catalytic components and lubricating particles added in the present invention work synergistically to form a more stable dynamic lubrication network. In contrast, the comparative example can only provide a primary friction reduction effect, and it is difficult to avoid the aggravation of local wear.

[0074] Experiment 2 Experimental objectives The performance of Example 2 and Comparative Example 2 in dynamic repair ability was verified, the efficiency of the material in generating a repair layer at the friction interface and its effect on alleviating wear were evaluated, and the synergistic effect of the flexible support frame of the present invention and catalytic repair was highlighted.

[0075] Experimental procedures Experimental equipment A friction and wear tester (disc-block friction mode) was used, and the test material was a GCr15 steel sample. The friction load was set to 1200N, the rotation speed was 800rpm, and the total test time was 50 hours.

[0076] Experimental samples Example 2 Sample: Prepare a flexible support frame, add molybdenum disulfide particles and catalytic components according to the proportions of Example 2, and mix them with lubricating oil at a ratio of 1:30 after uniform dispersion.

[0077] Comparative Example 2 sample: a lubricant without strictly controlling the particle size and the support frame ratio was prepared, and the molybdenum disulfide lubricating particles were omitted.

[0078] Experimental operation Initial wear: Use metallographic sandpaper to perform preliminary wear treatment on the sample surface to simulate the initial wear state of the real gear in use.

[0079] Add lubricant: Add 20ml of lubricant sample to ensure that the contact surfaces are fully lubricated.

[0080] Experimental operation: Load the friction and wear tester, set the parameters and start the equipment, and record the changes in wear every 10 hours.

[0081] Surface observation: After the experiment, the surface morphology of the sample was observed using a scanning electron microscope (SEM) to analyze the formation of the repair layer.

[0082] Experimental data of dynamic repair ability of Example 2 and Comparative Example 2 Time (hours) Example 2 Wear loss (μm) Comparative Example 2 Wear loss (μm) 0 0 0 10 5.72 10.93 20 6.21 15.12 30 6.4 19.32 40 6.4 22.74 50 6.42 25.08 The experimental results directly reveal the great advantages of the material of the present invention in dynamic repair performance. The wear amount of Example 2 increased rapidly in the first 10 hours, then gradually stabilized, and remained basically constant after 20 hours. This shows that the catalytic component reacted rapidly under the stimulation of friction heat to generate a dense and uniform ceramic repair layer. In contrast, the wear amount of Comparative Example 2 continued to increase, no effective repair layer was formed, and the wear curve was significantly higher. This clearly reflects the inadequacy of the repair ability of the unoptimized particle size and lubricating components; Further analysis revealed that the flexible support frame of Example 2 not only slowed down initial wear, but also significantly improved the repair efficiency. The rigid support provided by the polystyrene particles reduced local contact stress and avoided excessive wear. The flexible polydimethylsiloxane network filled microscopic gaps through adaptive deformation to maintain interface stability. The activation reaction of the catalytic particles and the low friction characteristics of the lubricating particles formed a synergistic effect, making the generation of the repair layer faster and more stable. In Comparative Example 2, the particle size was not strictly controlled, and the rigid-flexible fit of the support frame was unbalanced, resulting in stress concentration at the wear interface, making it difficult to effectively trigger the repair reaction; It can also be seen from the observation of the worn surface morphology that the repair layer of Example 2 is dense and has no obvious peeling phenomenon, and the surface smoothness is high. This result verifies the stability and efficiency of the catalytic component of the present invention under high temperature and high pressure conditions. In Comparative Example 2, due to the incomplete development of the catalytic reaction, deep scratches appeared on the worn surface and no continuous repair layer was formed. It can be said that the support frame design and catalytic reaction optimization of the present invention are the core foundation for the realization of dynamic repair capabilities.

[0083] Experiment 3 Experimental objectives The dispersion uniformity and suspension stability of the composite lubricant in Example 3 and Comparative Example 3 were verified, and the influence of the material preparation process on the dispersion effect was analyzed through indicators such as particle size distribution and suspension stability, and the dispersion optimization technology of the present invention was evaluated.

[0084] Experimental procedures Experimental equipment Dynamic Light Scattering (DLS): used to measure the particle size distribution of lubricants.

[0085] Microscope: Observe the suspension state and distribution uniformity of particles.

[0086] Constant temperature static container: evaluates the static stability of lubricants.

[0087] Experimental samples Example 3 Sample: The preparation process of Example 3 was adopted, sodium dodecylbenzene sulfonate was added as a surfactant, ethanol was used as a dispersion medium, and ultrasonic dispersion treatment was performed for 10 minutes.

[0088] Comparative Example 3 Sample: Prepared using Comparative Example 3, omitting the surfactant and ultrasonic dispersion treatment, and directly stirring for 20 minutes.

[0089] Experimental operation Particle size distribution measurement: Take 1 ml of sample and inject it into the dynamic light scattering test cell to test the particle size distribution of the particles in the lubricant and record the data.

[0090] Observation of distribution uniformity: Take a small amount of sample and drop it onto a microscope slide, observe the distribution of particles in the lubricant and take photos.

[0091] Static stability test: inject the sample into a transparent static container, place it at a constant temperature of 40°C for 24 hours, and observe and record the particle sedimentation status.

[0092] Comparative experimental data of dispersion uniformity and static stability of Example 3 and Comparative Example 3 The experimental results of dispersion uniformity clearly reveal the advantages of the process of the present invention in particle dispersion and suspension stability. The particle size distribution of Example 3 is concentrated and small, with a distribution range of 0.8 to 1.6 μm, while the particle size distribution of Comparative Example 3 is significantly larger and has a wider distribution range, which shows that the present invention effectively controls the disaggregation and distribution of particles through the introduction of surfactants and ultrasonic dispersion technology. The role of surfactants cannot be ignored. It weakens the van der Waals force between particles by forming a charge layer on the surface of the particles, allowing the particles to maintain a high dispersion stability. However, due to the lack of such a stabilization mechanism, the particles of the comparative example are prone to aggregation and form larger agglomerates. The static stability test further confirms the superiority of the present invention. After 24 hours, only 7.4% of the particles in the sample of Example 3 settled, showing excellent suspension stability, while the sedimentation rate of Comparative Example 3 was as high as 39.2%, and an obvious particle aggregation layer was visible at the bottom of the container. This is closely related to the difference in dispersion processes. The present invention introduces the cavitation effect through ultrasonic dispersion to depolymerize the agglomerated state of the particles. At the same time, sodium dodecylbenzene sulfonate is used as a surfactant to further stabilize the suspended state of the particles. Comparative Example 3 lacks ultrasonic treatment and relies only on mechanical stirring, which cannot effectively disperse the particles, resulting in rapid sedimentation of the particles under static conditions; Observation of distribution uniformity under a microscope also shows significant differences. The particles of Example 3 are evenly distributed in the lubricant, with no obvious particle agglomeration, while more large particle agglomerates can be seen in Comparative Example 3. This difference directly affects the actual performance of the lubricant in the gearbox. Evenly distributed particles can form a consistent lubricating film at the friction interface, thereby reducing local friction and wear, while Comparative Example 3 has uneven particles and uneven lubrication effects, which can easily lead to increased local friction and performance failure. This difference in mechanism determines the difference in performance of the two lubricants in actual applications, and the advantages of the present invention in dispersion uniformity and stability are obvious.

[0093] Experiment 4 Experimental objectives By comparing the anti-wear performance of the composite lubricant in Example 1 and Comparative Example 4 under high load conditions, it is verified how the synergistic effect of the catalytic component and the support frame of the present invention improves the wear resistance of the gear surface.

[0094] Experimental procedures Experimental equipment Use the gearbox simulation test bench to set high load and high speed operating conditions. Load 1500N, speed 1000rpm, running time 48 hours.

[0095] Experimental samples Example 1 Sample: A lubricant containing activated magnesium aluminum layered double hydroxide and cobalt aluminum layered double hydroxide was prepared and mixed with lubricating oil in a ratio of 1:20 according to the formula of Example 1.

[0096] Comparative Example 4 sample: No cobalt aluminum layered double hydroxide was added when preparing the lubricant, and the ratio of the material to the lubricating oil was adjusted to 1:50.

[0097] Experimental operation Gearbox preparation: Clean the inner cavity of the gearbox to ensure that no other lubricant remains. Install the test gear (made of 20CrMnTi).

[0098] Lubricant injection: inject 20 ml of the sample lubricant of Example 1 and Comparative Example 4 respectively to ensure that the lubricant completely covers the gear contact area.

[0099] Operation test: Start the gearbox, run it according to the set parameters, and monitor the wear and operating temperature of the friction pair in real time.

[0100] Surface observation: After the test, remove the gear and use a metallographic microscope to observe the wear marks on the gear surface and the formation of the ceramic repair layer, and record the results.

[0101] Experimental data of anti-wear performance of Example 1 and Comparative Example 4 The experiment clearly shows the outstanding advantages of Example 1 in anti-wear performance. The gear surface wear increases in the early stage of operation, but as time goes by, the wear rate in Example 1 gradually slows down and stabilizes after 24 hours. This phenomenon shows that the material of the present invention quickly generates a ceramic repair layer on the friction interface through the activation reaction of the catalytic component, thereby reducing the wear. However, since Comparative Example 4 does not add cobalt-aluminum layered double hydroxide, its repair reaction efficiency is low, the gear surface wear continues to increase, and it is difficult to form an effective repair protection layer; The change in the operating temperature of the gearbox also reflects the performance differences between the materials. The lubricant in Example 1 has a uniform and stable lubricating film, which quickly disperses the heat at the friction interface and keeps the operating temperature within a reasonable range. In contrast, the lubricating film of Comparative Example 4 is unevenly distributed and has poor adhesion, resulting in a gradual increase in the temperature of the friction interface and even local overheating. This is closely related to the flexible support frame in Example 1. The dynamic adaptability of polydimethylsiloxane can maintain the integrity of the lubricating film in a high-load environment, while Comparative Example 4, which lacks this design, performs poorly under dynamic conditions. The results of metallographic microscope observations further verified the advantages of Example 1. The gear surface of Example 1 was covered with a uniform and dense repair layer with a thickness of about 10 μm, and it was tightly bonded to the substrate without obvious cracks or peeling. This is due to the synergistic effect of the catalytic components (magnesium aluminum and cobalt aluminum layered double hydroxides), which can react quickly under the stimulation of friction heat to generate a protective layer. However, the gear surface of Comparative Example 4 failed to form an effective repair layer, only irregular wear marks were visible, and more substrate material was exposed. This difference in repair ability directly highlights the creativity of the catalytic components and support frame design of the present invention.

[0102] Experiment 5 Experimental objectives The compressive performance of the composite support frame of the present invention is verified, and by comparing Example 2 with Comparative Example 2, the influence of the proportion control of the flexible and rigid support structures on the compressive performance of the material is studied.

[0103] Experimental procedures Experimental equipment Universal materials testing machine, used to determine the compressive strength and deformation of the sample.

[0104] Experimental samples Example 2 Sample: A composite frame material with a strictly controlled ratio of flexible and rigid support was prepared. The polystyrene particles had a diameter of 1 μm and a polydimethylsiloxane solution concentration of 15%. The particles were mixed in a mass ratio of 1:1 and hot-pressed into a cylindrical sample with a diameter of 10 mm and a height of 10 mm.

[0105] Sample of Comparative Example 2: The particle size was not strictly controlled, the diameter of the polystyrene particles was 2 to 5 μm, the concentration of the polydimethylsiloxane solution was diluted to 5%, and the mixture was mixed at a mass ratio of 1:3 and hot-pressed into cylindrical samples of the same specifications.

[0106] Experimental operation Compression test: Fix the sample in the fixture of the universal material testing machine, load at a speed of 5 mm / min, and gradually apply pressure until the sample breaks.

[0107] Data recording: record the maximum bearing pressure and corresponding compression deformation of the specimen.

[0108] Fracture observation: After the test, observe the fracture morphology of the specimen and analyze the failure mode and internal structure changes.

[0109] Experimental data on the compressive performance of the composite support frame of Example 2 and Comparative Example 2 The experimental results clearly reveal the superiority of the composite support frame of Example 2 in compressive performance. The maximum bearing pressure of the sample of Example 2 reaches 85.3MPa, while that of Comparative Example 2 is only 62.8MPa, which is a significant difference. The reason is that the present invention achieves a dynamic balance of mechanical properties by strictly controlling the ratio of flexible and rigid supports. The polystyrene particles provide a rigid skeleton that can effectively disperse compressive stress, while the polydimethylsiloxane flexible network absorbs stress through moderate deformation, avoiding stress concentration. In contrast, due to the large particle size and insufficient flexible matrix of Comparative Example 2, the stress concentration problem in the support structure is prominent, leading to early rupture; The comparison of compression deformation also shows that the sample in Example 2 exhibits higher rigidity and flexibility coordination. The deformation of 12.7% reflects the adaptability of the material under high load conditions, while the deformation of Comparative Example 2 is as high as 18.3%, indicating that it is insufficient in rigidity and has limited load-bearing capacity. This difference is directly related to the dynamic characteristics of the flexible support frame. The uniformly distributed polystyrene particles in the present invention form a stable structural frame by embedding in the flexible matrix, while Comparative Example 2 suffers from local collapse and fragmentation due to uneven particle distribution and insufficient concentration. From the perspective of the fracture mode, the fracture morphology of the sample in Example 2 is uniform, the interlayer distribution is consistent, and there is no large-scale fragmentation, which proves that the integrity of the support frame is strong. The sample in Comparative Example 2 shows local fragmentation under high pressure, and even accompanied by obvious collapse. This phenomenon reveals the insufficient bonding force between its particles and the matrix, and the rigid skeleton cannot effectively support the overall structure. The present invention significantly improves the compressive performance and structural stability of the frame by optimizing the particle size and regulating the rigid-flexible ratio, meeting the needs under high-load friction environments.

[0110] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A friction-reducing self-repairing material, characterized in that: The friction-reducing self-repairing material comprises: Ethylene propylene rubber: 35-45 parts; Polypropylene: 20-30 parts; Disulfide or sulfur: 3-6 parts; Zinc oxide: 1-2 parts; Magnesium aluminum layered double hydroxide: 4-6 parts; Cobalt aluminum layered double hydroxide: 2-3 parts; Cerium oxide: 2-4 parts; Titanium oxide: 1-2 parts; Molybdenum disulfide particles: 4-6 parts; Polystyrene: 3-5 parts; Polydimethylsiloxane: 5-7 parts; Dipotassium hydrogen phosphate: 1 to 2 parts.

2. A method for preparing a friction-reducing self-repairing material, characterized in that: Using the friction-reducing self-repairing material according to claim 1 comprises the following steps: Pretreatment of materials; Mixing and dispersion of materials; Thermoforming of materials; Drying of materials.

3. The method for preparing a friction-reducing self-repairing material according to claim 2, characterized in that: The pretreatment of the material includes: The ethylene-propylene rubber and the polypropylene are dried separately according to the weight ratio range, and dried at a temperature of 50 to 70°C for 2 to 4 hours; The magnesium aluminum layered double hydroxide is dispersed in deionized water, with an ultrasonic power of 50 to 100 W and a dispersion time of 20 to 40 minutes; The cerium oxide and the titanium oxide are obtained by calcination treatment, the calcination temperature is 400-600° C., and the calcination time is 2-4 hours.

4. The method for preparing a friction-reducing self-repairing material according to claim 3, characterized in that: The pretreatment of the material further comprises: The mixture of magnesium aluminum layered double hydroxide and cobalt aluminum layered double hydroxide is activated after dispersion, and the activation step includes: The dispersed mixture is placed in a deionized water solution at 80 to 100° C. and stirred for 20 to 40 minutes; During the stirring process, 0.5 to 1.5 parts of sodium dihydrogen phosphate are added to the solution as a stabilizer to further enhance its catalytic performance.

5. The method for preparing a friction-reducing self-repairing material according to claim 4, characterized in that: The mixing and dispersing of the materials includes: Add the friction-reducing self-repairing material into a mixing tank according to the weight ratio; Adding ethanol as a dispersion medium, the weight ratio of ethanol to the total components is 1.5 to 2.5; The stirring speed is controlled at 300-500 rpm and the stirring time is 15-30 minutes; The mixed components are placed in an ultrasonic dispersion device with an ultrasonic power of 40 to 80 W and a dispersion time of 10 to 20 minutes.

6. The method for preparing a friction-reducing self-repairing material according to claim 2, characterized in that: The mixing and dispersing of the materials further comprises the following steps: The dispersion medium is ethanol or deionized water, and the mixing ratio is 1:1 to 3:1 by volume; Adding a surfactant to the mixed solution, wherein the surfactant is sodium dodecylbenzene sulfonate, and the mass ratio is 0.5-1% of the total mass of the solution; After the dispersion treatment, the viscosity of the mixed system is monitored and controlled at 0.5-1.5 Pa·s. The viscosity is adjusted by increasing or decreasing the amount of dispersion medium to ultimately ensure the stability of the system.

7. The method for preparing a friction-reducing self-repairing material according to claim 5, characterized in that: The mixture of polystyrene and polydimethylsiloxane is a composite support structure, and the preparation method thereof comprises the following steps: Polystyrene is formed into micron-sized particles by melt extrusion, and the particle diameter is 0.5 to 1.5 μm; Polydimethylsiloxane was prepared by the solution gel method, using ethanol as a solvent and diluted to a concentration of 10-20%; Adding polystyrene particles to the polydimethylsiloxane solution, mixing in a mass ratio of 1:1 to 1:2, and stirring at 60 to 80° C. for 15 to 30 minutes to form a uniform composite support structure; The composite structure is blended with other components through hot pressing technology to form a wear-reducing self-healing material with a flexible support frame.

8. The method for preparing a friction-reducing self-repairing material according to claim 5, characterized in that: During the molding process of the composite support structure, the flexible support frame is cross-linked with the base material through intermolecular forces, and finally a continuous lubrication network is formed.

9. The method for preparing a friction-reducing self-repairing material according to claim 7, characterized in that: The drying process of the material comprises: Use a vacuum drying oven, the drying temperature is controlled at 50-70°C, the drying time is 2-5 hours, and the vacuum degree of the drying environment is -0.08--0.1MPa; After drying, the material is cooled to room temperature, and granular material with a particle size of 1 to 3 mm is screened out for mixing with lubricating oil; For sheet materials, place them in a constant temperature box at 40-50°C for further leveling for 1-2 hours to ensure uniform thickness of the material.

10. A method for applying a friction-reducing self-repairing material to an industrial gearbox and a bearing, characterized in that: A friction-reducing self-repairing material according to claim 1 is used, wherein the friction-reducing self-repairing material is mixed with industrial gearbox lubricating oil to form a composite lubricant for use, and the preparation method of the composite lubricant comprises: Adding the anti-friction self-repairing material into the lubricating oil at a weight ratio of 1:20 to 1:50; At 50-70°C, the friction-reducing self-repairing material and the lubricating oil are stirred evenly by a magnetic stirrer for 1-2 hours; The prepared composite lubricant is injected into the gearbox lubrication system, and the gearbox is operated at a low speed for 10 to 20 minutes to ensure that the material is evenly distributed inside and at the bearings.

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