An ultra-wear-resistant high polymer sliding material ZMSM

Abstract

The application discloses a kind of ultra-wear-resistant high molecular sliding materials ZMSM, belong to high polymer composite material and structural bearing technical field;The sliding material is made by ultra-high molecular polyethylene and a variety of functional additives by blending, forming process;The additive includes one or more of glass bead / glass fiber, carbon fiber, graphite, carbon black, coupling agent, stabilizer, lubricant, anti-wear agent, anti-aging agent and anti-chemical corrosion agent;The material of the application has excellent sliding characteristics, high allowable pressure, wide temperature range adaptability, very low friction coefficient and ultra-long service life, especially suitable for high-speed, high-load, wide-temperature-range working conditions under structural bearing, sliding plate, support and other fields.Compared with traditional polytetrafluoroethylene sliding material, the allowable pressure of the material of the application is increased by 2 times, the cumulative sliding displacement life is increased by more than 5 times, the applicable temperature range is expanded to-50°C~+70°C, and the wear rate is significantly reduced under high-speed motion conditions;The application also discloses the preparation process of the material, and the process is simple and easy to industrial production.

Description

Technical Field

[0001] This invention belongs to the field of polymer composite materials and structural bearing technology, and particularly relates to an ultra-wear-resistant polymer sliding material ZMSM. Background Technology

[0002] Structural bearing sliding materials are key load-bearing components in bridges, buildings, mechanical engineering, and other fields. Their wear resistance, load-bearing capacity, temperature adaptability, and service life directly determine the safety and durability of the structure.

[0003] Currently, polytetrafluoroethylene (PTFE) is the most widely used sliding material in engineering. PTFE has a low coefficient of friction, but it has the following inherent drawbacks: Insufficient wear resistance: Severe wear under high-speed motion conditions, making it difficult to meet the requirements of high-frequency, high-displacement-speed working conditions; Limited load-bearing capacity: the permissible contact pressure is generally no more than 45 MPa, and the load-bearing capacity decreases significantly when the temperature is above 30℃.

[0004] Poor temperature adaptability: The applicable temperature range is only -35℃ to +48℃, which cannot meet the needs of extremely cold or high temperature environments; Short service life: The cumulative sliding displacement life is limited, requiring frequent replacement and resulting in high maintenance costs; Poor rigidity adaptability: It cannot adapt to deviations in concrete structure settings, and is prone to local over-stress and abnormal wear.

[0005] To overcome these shortcomings, existing technologies attempt to add fillers such as glass fiber, carbon fiber, and graphite to PTFE, or replace PTFE with ultra-high molecular weight polyethylene (UHMWPE). However, pure UHMWPE still suffers from insufficient sliding properties, significant high-speed wear, and decreased low-temperature toughness. Furthermore, some technical solutions use fluorine / chlorine-containing materials or recycled fillers, which do not meet environmental protection requirements.

[0006] Therefore, developing a new type of sliding material that combines high wear resistance, high load-bearing capacity, wide temperature range, long lifespan, and environmental friendliness has become an urgent technical problem to be solved in this field. Summary of the Invention

[0007] This invention addresses the shortcomings of the prior art by providing an ultra-wear-resistant polymer sliding material, ZMSM, which effectively solves the problems of high wear under high-speed motion, low load capacity, narrow applicable temperature range, short service life, and high rigidity that prevents traditional bearing sliding materials from adapting to structural deviations.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A super wear-resistant polymeric sliding material ZMSM is prepared from a composition including ultra-high molecular weight polyethylene and additives; The additives include one or more of glass microspheres / glass fiber, carbon fiber, graphite, carbon black, coupling agent, stabilizer, lubricant, anti-wear agent, anti-aging agent and anti-chemical corrosion agent, which are used to enhance sliding properties, increase permissible pressure, extend service life, and give the material insensitivity to chemical contamination and aging.

[0009] As a further preferred embodiment of the ultra-wear-resistant polymeric sliding material of the present invention, based on 100 parts of ultra-high molecular weight polyethylene: The lubricant is selected from at least one of polytetrafluoroethylene micro powder, graphite, and molybdenum disulfide, and its mass fraction is 1 to 10 parts. The anti-wear agent is selected from at least one of nano-silica, nano-alumina, and silicon carbide, and its mass fraction is 0.5 to 5 parts; The anti-aging agent is selected from at least one of hindered phenolic antioxidants and phosphite antioxidants, and its mass fraction is 0.1 to 3 parts; The chemical corrosion resistant agent is selected from at least one of fluorinated ethylene propylene copolymer and perfluoroalkoxy resin, and its mass fraction is 0.5 to 5 parts.

[0010] As a further preferred embodiment of the ultra-wear-resistant polymer sliding material of the present invention, the allowable pressure of the sliding material is ≥90MPa, which is more than twice that of the polytetrafluoroethylene sliding material; the applicable temperature range of the sliding material is -50℃ to +70℃. The coefficient of friction is ≤3% at -50℃, ≤2% at -35℃, and ≤1.5% at 5℃; the cumulative sliding displacement life of the sliding material is more than 5 times that of the polytetrafluoroethylene sliding material.

[0011] A process for preparing the aforementioned ultra-wear-resistant polymeric sliding material, characterized by comprising the following steps: (1) Add ultra-high molecular weight polyethylene and additives to a mixing equipment according to the ratio, and perform dry mixing or melt blending to obtain a mixture; (2) The mixture is molded into a sliding material preform by compression molding, extrusion molding or injection molding process; (3) The sliding material blank is machined to form a sliding plate or bearing structure; (4) Optionally, the processed product is subjected to surface treatment, including at least one of polishing, calendering and cleaning.

[0012] Preferably, in step 1: the dry mixing speed is 800-1500 rpm, the mixing time is 5-20 minutes, and the melt blending temperature is 190℃-230℃; In step (2): the temperature of compression molding is 200℃~230℃, the pressure is 10~20MPa, and the holding time is 10~30 minutes; the screw speed of extrusion molding is 50~200rpm, and the barrel temperature is 200℃~230℃; The sliding material structure is a sliding plate structure, and its structural form is: perforated on both sides, perforated on one side and smooth on the other side, or smooth on both sides; the thickness of the sliding plate is 5-20mm, the hole diameter is 2-10mm, and the hole spacing is 5-30mm.

[0013] Methods to improve the wear resistance stability of ultra-wear-resistant polymer sliding materials under complex working conditions By collecting friction data of polymer materials at various sliding speeds, the initial state of molecular chain arrangement and deformation parameters are obtained, and a structural response dataset corresponding to the speed change is obtained. Based on the structural response dataset corresponding to the obtained velocity changes, molecular dynamics simulation methods are used to process the molecular chain alignment adjustment process and determine the distribution of the influence of sliding velocity on the internal structure's tensile and compressive stress. If it is determined that the influence of sliding speed on the tensile and compressive distribution of the internal structure exceeds a preset threshold, a mesh representation with inconsistent surface and internal deformation is constructed through a finite element analysis model to obtain the region mapping of stress dispersion failure. From the obtained stress dispersion failure region map, the key interval of wear resistance decline is extracted, and it is determined whether the deformation inconsistency leads to the breakage of surface molecular chains, so as to obtain the performance fluctuation evaluation index. Based on the obtained performance fluctuation evaluation index, molecular dynamics simulation was used to iteratively optimize the molecular chain arrangement parameters and determine the adjustment scheme to achieve consistent deformation under different sliding speeds. The internal structural model is updated by determining the adjustment scheme, the balanced distribution of optimized stress dispersion is obtained, the wear resistance is determined to be stable across the entire speed range, and the final microstructure adaptability change law is obtained. Based on the obtained adaptive change law of the final microstructure, a stability improvement path for polymer materials under complex working conditions is generated, and a deep correlation description of the effect of speed change on wear resistance is determined.

[0014] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects: This invention discloses a significantly improved wear resistance: no significant wear is observed even at a displacement speed 7.5 times that of PTFE, demonstrating extremely strong adaptability to high-speed motion; Doubled load capacity: Permissible contact pressure ≥90MPa, more than twice that of PTFE, enabling miniaturized design; The temperature range has been greatly expanded: the applicable temperature range is -50℃ to +70℃, which is significantly wider than that of PTFE (-35℃ to +48℃), and the low-temperature friction is stable; Service life extended by more than 5 times: The cumulative sliding displacement life is 5 times that of PTFE, significantly reducing maintenance costs; Extremely low coefficient of friction: ≤1.5% at 5℃, ≤2% at -35℃, and ≤3% at -50℃, ensuring low-friction operation throughout the entire process; Highly adaptable: It can adapt to deviations in concrete structure settings and avoid localized excessive stress and abnormal wear; Environmentally friendly: Free from harmful components such as fluorine and chlorine, does not use recycled or filler materials, and is green and environmentally friendly throughout its entire life cycle; The process is simple: it can be produced using conventional polymer molding equipment, making it easy for industrial production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the perforated structure of the ultra-wear-resistant polymer sliding material slide plate prepared according to the present invention; Figure 2 This is a schematic diagram of the structure of the ultra-wear-resistant polymer sliding material skateboard prepared according to the present invention; Figure 3 This is a schematic diagram illustrating the compressive strength properties of the ultra-wear-resistant polymer sliding material prepared according to the present invention. Figure 4 This is a process flow diagram of the ultra-wear-resistant polymeric sliding material prepared according to the present invention. Figure 5 This is a flowchart of the method for improving the wear resistance stability of the ultra-wear-resistant polymer sliding material under complex working conditions according to the present invention; Figure 6 This is a schematic diagram of the method for improving the wear resistance stability of the ultra-wear-resistant polymer sliding material under complex working conditions according to the present invention. Figure 1 .

[0016] Figure 7 This is a schematic diagram of the method for improving the wear resistance stability of the ultra-wear-resistant polymer sliding material under complex working conditions according to the present invention. Figure 2 . Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and thoroughly described below with reference to the accompanying drawings. The described embodiments are merely some embodiments of the present invention.

[0018] ZMSM represents a high-performance, ultra-wear-resistant structural bearing sliding material developed by Zhongqiaolian Company.

[0019] ZMSM is a high-performance structural bearing sliding material. It is ultra-high molecular weight polyethylene modified with various additives, resulting in enhanced sliding properties. Compared with ordinary PTFE, ZMSM is characterized by higher durability, twice the allowable pressure, and therefore smaller size and lower sliding resistance.

[0020] ZMSM does not contain recycled or filler materials or any environmentally harmful ingredients such as fluorine or chlorine.

[0021] ZMSM is insensitive to chemical contamination and aging.

[0022] ZMSM is specifically designed for the production of Zhongqiaolian products.

[0023] ZMSM material properties: ZMSM is particularly suitable for high-speed motion, showing less wear at 7.5 times the displacement speed compared to PTFE.

[0024] ZMSM can withstand high loads (twice the contact pressure compared to PTFE).

[0025] ZMSM is suitable for temperatures ranging from -50°C to +70°C (while PTFE is only suitable for temperatures ranging from -35°C to +48°C, and its load-bearing capacity decreases above 30°C).

[0026] ZMSM generates very low friction: the design friction value is <1.5% at 5°C, <2% at -35°C, and <3% at the effective support temperature of -50°C.

[0027] ZMSM achieves a very long service life (5 times the cumulative sliding displacement compared to PTFE without noticeable signs of wear).

[0028] ZMSM can accommodate concrete set and uniformity deviations due to its elastic properties (while rigid sliding materials may lead to localized overstress and wear).

[0029] The compression at the ULS should be at least 1.0 mm.

[0030] Therefore, the Zhongqiaolian ZMSM spherical bearing significantly reduces the floor space required, especially under high load conditions, thus minimizing the cost of related structures. See Table 1 for details.

[0031] Table 1 project PTFE ZMSM (China Bridge Union) Certified glide distance 10 km 50km Certified gliding speed 2mm / s 15mm / s Design friction force 3% 2% Design life 10 years 50 years .

[0032] The specific embodiment is as follows: A super wear-resistant polymeric sliding material ZMSM is prepared from a composition including ultra-high molecular weight polyethylene and additives; The additives include one or more of glass microspheres / glass fiber, carbon fiber, graphite, carbon black, coupling agent, stabilizer, lubricant, anti-wear agent, anti-aging agent and anti-chemical corrosion agent, which are used to enhance sliding properties, increase permissible pressure, extend service life, and give the material insensitivity to chemical contamination and aging.

[0033] The sliding material exhibits an average friction coefficient ≤0.02 under a test pressure of 90MPa and a cumulative sliding distance of 6m, and shows no visible wear on its surface.

[0034] The weight-average molecular weight of the ultra-high molecular weight polyethylene is 1 million to 6 million, preferably 3 million to 5 million.

[0035] Based on 100 parts of ultra-high molecular weight polyethylene: The lubricant is selected from at least one of polytetrafluoroethylene micro powder, graphite, and molybdenum disulfide, and its mass fraction is 1 to 10 parts. The anti-wear agent is selected from at least one of nano-silica, nano-alumina, and silicon carbide, and its mass fraction is 0.5 to 5 parts; The anti-aging agent is selected from at least one of hindered phenolic antioxidants and phosphite antioxidants, and its mass fraction is 0.1 to 3 parts; The chemical corrosion resistant agent is selected from at least one of fluorinated ethylene propylene copolymer and perfluoroalkoxy resin, and its mass fraction is 0.5 to 5 parts.

[0036] The allowable pressure of the sliding material is ≥90MPa, which is more than twice that of the polytetrafluoroethylene sliding material; the applicable temperature range of the sliding material is -50℃ to +70℃. The coefficient of friction is ≤3% at -50℃, ≤2% at -35℃, and ≤1.5% at 5℃; the cumulative sliding displacement life of the sliding material is more than 5 times that of the polytetrafluoroethylene sliding material. Example

[0037] 1. Material composition: Ultra-high molecular weight polyethylene (molecular weight approximately 5 million): 100 parts Lubricant (such as polytetrafluoroethylene micro powder): 5 parts Anti-wear agent (such as molybdenum disulfide): 3 parts Anti-aging agent (such as hindered phenolic antioxidant): 1 part Chemical corrosion resistant agent (such as fluorinated ethylene propylene copolymer): 2 parts 2. Preparation process: The above raw materials were dry-mixed in a high-speed mixer for 10 minutes at a speed of 1200 rpm; The mixture is fed into a twin-screw extruder and melt-blended and extruded at 200°C to 220°C. The extruded material is cooled and pelletized to obtain composite material granules; The granules are placed in a molding machine and molded at 220°C and 15MPa, held under pressure for 20 minutes, and then cooled and demolded. The shaped sheet material is surface polished and processed into a double-sided perforated structure according to requirements.

[0038] 3. Performance Testing: Linear abrasion test was conducted according to GB / T 37358-2019, with a sample size of Φ150mm×7mm; Test pressure: 90 MPa; Total sliding distance: 6m; Average coefficient of friction: 0.02; No visible wear marks were found on the surface after the test, indicating that the material functioned normally. Example

[0039] 1. Material composition: Ultra-high molecular weight polyethylene (molecular weight approximately 3.5 million): 100 parts Lubricant (e.g., graphite): 4 parts Anti-wear agent (such as nano silica): 2 parts Anti-aging agent (such as phosphite antioxidant): 1 part 2. Preparation process: Dry mix for 10 minutes at 1000 rpm; Molded at 210°C, pressure 12MPa, holding pressure for 15 minutes; After molding, it is processed into a structure with holes on one side and a smooth plate on the other.

[0040] 3. Performance Testing: Under the same test conditions, the coefficient of friction is 0.021; The cumulative sliding displacement life is 5.3 times that of PTFE material; The coefficient of friction is 2.8% at -50°C, which meets the requirements for low-temperature operating conditions.

[0041] Example 3 (Comparative Example) 1. Material composition: Pure polytetrafluoroethylene (PTFE): 100 parts 2. Preparation process: Compression molding, pressure 10MPa, temperature 360°C, pressure holding for 10 minutes.

[0042] 3. Performance Testing: Under the same test conditions, the coefficient of friction is 0.08; Significant plastic deformation was observed under a pressure of 90 MPa; The cumulative sliding displacement life is only 1 / 5 of that in Example 1; Applicable temperature range: -35°C to +48°C; load-bearing capacity decreases significantly above 30°C. A comparison of technical effects is shown in Table 2.

[0043] Table 2

[0044] Schematic diagrams of three typical structures of the ultra-wear-resistant polymer sliding material skateboard described in this invention.

[0045] It has fat storage pits on both sides: The slide body is a rectangular flat plate with a thickness of t (5-20mm). Several grease reservoirs are evenly distributed on both the upper and lower surfaces. The depth of each reservoir is 1-1.5mm, the diameter d is 2-10mm, and the spacing L is 5-30mm. The circular reservoirs are arranged in a matrix with uniform edge spacing. This structure is suitable for applications requiring bidirectional positioning, grease storage lubrication, or weight reduction.

[0046] One side has a fat storage pit, and the other side is a flat plate. The slide body is a rectangular flat plate with a thickness of t (5-20mm). The upper surface has several non-through grease reservoirs, and the lower surface is a smooth plane. The depth of the grease reservoirs is 1-1.5mm, and the diameter of the holes is 2-10mm. This structure is suitable for support systems that are fixed on one side and slide on the other.

[0047] No grease trap (flat plate): The slide body is a rectangular flat plate with a thickness of t (5-20mm); both the upper and lower surfaces are smooth planes without grease reservoirs. This structure is suitable for main sliding surfaces requiring high pressure, high speed, and low friction.

[0048] A process for preparing the aforementioned ultra-wear-resistant polymeric sliding material, such as... Figure 4 As shown, it includes the following steps: (1) Add ultra-high molecular weight polyethylene and additives to a mixing equipment according to the ratio, and perform dry mixing or melt blending to obtain a mixture; (2) The mixture is molded into a sliding material preform by compression molding, extrusion molding or injection molding process; (3) The sliding material blank is machined to form a sliding plate or bearing structure; (4) Optionally, the processed product is subjected to surface treatment, including at least one of polishing, calendering and cleaning.

[0049] Preferably, in step 1: the dry mixing speed is 800-1500 rpm, the mixing time is 5-20 minutes, and the melt blending temperature is 190℃-230℃; In step (2): the temperature of compression molding is 200℃~230℃, the pressure is 10~20MPa, and the holding time is 10~30 minutes; the screw speed of extrusion molding is 50~200rpm, and the barrel temperature is 200℃~230℃; like Figure 1 and Figure 2As shown, the sliding material structure is a sliding plate structure, and its structural form is: double-sided perforated, one-sided perforated and one-sided smooth plate, or double-sided smooth plate; the thickness of the sliding plate is 5-20mm, the hole diameter is 2-10mm, and the hole spacing is 5-30mm.

[0050] Its process flow includes the following steps in sequence: Section 1 – Raw Material Pretreatment Ultra-high molecular weight polyethylene (UHMWPE) granules and powdered functional additives are dried to control the moisture content to ≤0.1%.

[0051] Section 2 – Ingredient Metering According to the formula ratio, with 100 parts of UHMWPE, weigh out 1-10 parts of lubricant, 0.5-5 parts of anti-wear agent, 0.1-3 parts of anti-aging agent, and 0.5-5 parts of anti-chemical corrosion agent, and put them into the automatic batching system.

[0052] Section 3 – Mixing and Dispersion: The proportioned materials are put into a high-speed mixer and dry-mixed at 800-1500 rpm for 5-20 minutes; or put into a twin-screw extruder and melt-blended at 190℃-230℃ to make the additives uniformly dispersed in the UHMWPE matrix.

[0053] Section 4 – Molding: Transfer the mixture to a molding press, extruder, or injection molding machine: Compression molding: Temperature 200℃~230℃, pressure 10~20MPa, holding pressure for 10~30 minutes; Extrusion molding: screw speed 50~200rpm, barrel temperature 200℃~230℃; Injection molding: Injection pressure 80~150MPa, mold temperature 40℃~80℃.

[0054] Section 5 – Machining: After forming, the sliding material blank is processed into a sliding plate or bearing structure as required by the design through processes such as cutting, drilling, and turning; the thickness of the sliding plate is 5-20mm, the hole diameter is 2-10mm, and the hole spacing is 5-30mm.

[0055] Section 6 – Surface Treatment (Optional): The processed products undergo surface treatments such as polishing, calendering, and plasma cleaning to remove burrs and improve surface smoothness.

[0056] Section 7 – Inspection and Packaging: After passing dimensional inspection, appearance inspection, and random sampling inspection of friction coefficient, the products are cleaned, packaged, and put into storage.

[0057] Figure 3This is a schematic diagram illustrating the compressive strength properties of the ultra-wear-resistant polymer sliding material prepared in this invention.

[0058] Methods to improve the wear resistance stability of ultra-wear-resistant polymer sliding materials under complex working conditions, such as... Figures 6-7 As shown, the method for improving the wear resistance stability of ultra-wear-resistant polymeric sliding material (ZMSM) under complex working conditions in this embodiment may specifically include: Step S101: By collecting friction data of polymer materials at various sliding speeds, the initial state of molecular chain arrangement and deformation parameters are obtained, and the structural response dataset corresponding to the speed change is obtained.

[0059] Friction data of polymer material surfaces were collected at various sliding speeds using a variable-speed friction experimental setup, and the corresponding speed values ​​and friction force sequences were recorded. Based on the friction force sequences, a Fast Fourier Transform was used to obtain frequency domain characteristics, determining the dominant vibrational frequencies of the molecular chains. The initial alignment state of the molecular chains was determined by analyzing the correspondence between the dominant frequencies and sliding speeds; if the dominant frequencies decreased with increasing speed, the initial alignment of the molecular chains was determined to be an ordered orientation state. Deformation parameters were extracted from the time-domain sequence of the friction data, and the elongation and recovery of the molecular chains were determined by calculating the peak spacing of the frictional forces. A clustering algorithm was used to group the deformation parameters and sliding speed combinations, obtaining molecular chain deformation parameter clusters for different speed ranges. A structural response mapping table was constructed for each deformation parameter cluster, linking sliding speed, initial molecular chain alignment state, and deformation parameters. A regression model was used to fit the correspondence between sliding speed and structural response in the structural response mapping table, determining the evolution of the molecular chain alignment state and the variation of deformation parameters under speed changes.

[0060] For example, when collecting friction data on polymer material surfaces using variable-speed friction testing equipment, an experimental scenario can be envisioned where a polyethylene film is used as the test material, and multiple sets of experiments are conducted within a sliding speed range from 0.1 m / s to 2.0 m / s. Each set of experiments records the sequential data of frictional force changes over time; for instance, at a speed of 0.5 m / s, the frictional force sequence exhibits periodic fluctuations, with a peak value of approximately 2.5 Newtons. This data can be used to further analyze the mechanical behavior of the material surface.

[0061] Specifically, when processing the friction force sequence using Fast Fourier Transform, the time-domain data is converted into frequency-domain data to extract vibrational frequency characteristics. Assuming a dominant frequency of 10 Hz at a speed of 0.5 m / s, the dominant frequency decreases to 8 Hz when the speed increases to 1.5 m / s. This phenomenon of frequency decreasing with increasing speed indicates that the initial molecular chain arrangement is in an ordered orientation state, because the vibration of ordered molecular chains is restricted at higher speeds, resulting in a lower frequency. This provides important evidence for determining the initial structure of the material.

[0062] For example, when extracting deformation parameters, the peak spacing can be analyzed from the time-domain sequence of friction force. Assuming a speed of 0.5 m / s, the peak spacing corresponds to a time of 0.2 seconds. Combining this with the speed, the molecular chain elongation is calculated to be approximately 0.1 mm, and the recovery is 0.08 mm. These parameters reflect the dynamic response characteristics of the molecular chain during friction, which helps to understand the deformation law of materials under different stresses.

[0063] Specifically, when grouping deformation parameters and sliding speeds using clustering algorithms, K-means clustering can be used to divide the data into three intervals: low speed, medium speed, and high speed. For example, in the low-speed interval (0.1 to 0.5 m / s), the average elongation is 0.05 mm; in the medium-speed interval (0.5 to 1.0 m / s), the elongation increases to 0.1 mm. This grouping method intuitively reflects the influence of speed on deformation, laying the foundation for subsequent modeling.

[0064] For example, when constructing a structural response mapping table, the sliding velocity, the initial alignment of the molecular chains, and the deformation parameters are correlated to form a multidimensional data table. Assuming a velocity of 1.0 m / s, the initial state is ordered orientation, with an elongation of 0.12 mm and a recovery of 0.09 mm. This mapping table provides data support for analyzing the relationship between structure and mechanical response.

[0065] Specifically, when fitting the relationship between sliding speed and structural response using a regression model, it was found that as the speed increases from 0.1 m / s to 2.0 m / s, the molecular chain arrangement gradually changes from ordered to disordered, and the elongation increases from 0.05 mm to 0.15 mm. This pattern reveals the evolution trend of molecular chains under speed changes, providing a theoretical basis for predicting the material's performance under different working conditions, and also helping to optimize material design and control friction performance. Through the above methods, we can not only gain a deeper understanding of the microscopic behavior of polymer materials during friction, but also provide data support for material selection and improvement in industrial applications, significantly improving material wear resistance and service life.

[0066] Step S102: Based on the obtained structural response dataset corresponding to the velocity change, the molecular dynamics simulation method is used to process the molecular chain arrangement adjustment process and determine the distribution of the influence of sliding velocity on the internal structure's stretching and compression.

[0067] Using molecular dynamics simulations, correlation data between sliding velocity and molecular chain alignment adjustment are extracted from the structural response dataset. A dynamic behavior model of the molecular chain at different velocities is constructed to obtain the preliminary response pattern. Based on this preliminary response pattern, the tensile effect of sliding velocity on the internal structure of the molecular chain is analyzed. The force distribution of the molecular chain at each velocity is calculated using preset force field parameters to determine the regional distribution of the tensile effect. For the regional distribution of the tensile effect, the compressive effect of the molecular chain under sliding velocity is addressed, acquiring local deformation data of the molecular chain during compression to identify the concentrated region of the compressive effect. If the concentrated region of the compressive effect overlaps with the tensile effect region, stress concentration points of the molecular chain within the overlapping region are extracted through data comparison and analysis, identifying the key locations of stress concentration. Based on the key locations of stress concentration, the overall stability of the internal structure of the molecular chain is analyzed. Local stress simulations are performed at these key locations using molecular dynamics simulation tools to identify weak points in the internal structure. Using data from these weak points, a distribution model of the influence of sliding velocity on the internal structure of the molecular chain is constructed to obtain detailed characteristics of the influence distribution and determine the effect mode of sliding velocity changes on the overall response of the molecular chain.

[0068] For example, when extracting data related to the sliding velocity and molecular chain alignment using molecular dynamics simulations, a scenario can be envisioned where polyethylene is used as the research material to simulate the sliding velocity change from 0.1 m / s to 2.0 m / s. Initially, the simulation tool is used to set the ordered arrangement of the molecular chains, and the effect of velocity change on the molecular chain orientation is observed. It is assumed that at the low velocity of 0.1 m / s, the molecular chains remain highly ordered, while at the high velocity of 2.0 m / s, some chain segments become disordered. This trend provides the basic data for constructing a dynamic behavior model.

[0069] For example, in analyzing the effect of sliding speed on the tensile properties of the molecular chain's internal structure, the stress on the molecular chain at different speeds can be simulated by pre-setting force field parameters. Assuming that at 0.5 m / s, the tensile stress is higher in the middle region of the molecular chain, while the ends are relatively relaxed, this non-uniform force distribution indicates the regional distribution characteristics of the tensile effect, providing direction for subsequent analysis. Furthermore, visualization tools can be used to display stress heatmaps of the tensile region, intuitively reflecting the location of stress concentration points.

[0070] For example, to investigate the compressive effects of molecular chains under sliding velocity, the compressive deformation of localized regions of the molecular chains can be simulated at a velocity of 1.0 m / s. Assuming that the simulation reveals larger compressive deformation in the molecular chain segments near the surface, the deformation data indicates a reduction in intersegmental spacing of approximately 0.02 nanometers in the localized region. This data helps identify the concentrated areas of compressive effects, laying the foundation for subsequent stress analysis.

[0071] For example, when dealing with overlapping areas of tension and compression, stress concentration points in the molecular chains within the overlapping area can be extracted through data comparison. Assuming a velocity of 0.8 m / s, the overlapping portion of the tension and compression areas is concentrated in the middle segment of the molecular chains, and the stress value at these concentration points is significantly higher than in the surrounding areas. This finding provides a basis for identifying critical locations and helps focus the analysis on weak points.

[0072] For example, when analyzing the overall stability of the internal structure of a molecular chain, local stress simulations can be performed at key locations of stress concentration. Suppose that simulation tools reveal that molecular chain segments at critical locations are prone to breakage at a speed of 1.5 m / s, indicating that these are weak points in the internal structure. Such analytical results provide important references for optimizing material structure design.

[0073] For example, when constructing a distribution model of the effect of sliding speed on the internal structure of molecular chains, the above data can be integrated to form detailed characteristics of the effect distribution. The model assumes that when the speed increases from 0.1 m / s to 2.0 m / s, the transition from order to disorder in the molecular chain is mainly concentrated in the surface region, while the internal region remains relatively stable. This characteristic helps to determine the mode of action of speed changes on the overall response of the molecular chain, providing theoretical support for subsequent material property regulation.

[0074] Step S103: If it is determined that the influence distribution of sliding speed on the tensile and compressive properties of the internal structure exceeds a preset threshold, then a mesh representation with inconsistent surface and internal deformation is constructed through a finite element analysis model to obtain the region mapping of stress dispersion failure.

[0075] A finite element method (FEM) model is used to divide the surface and internal meshes. The stress dispersion failure region mapping is obtained by calculating deformation differences. Displacement deviation data is extracted from the stress dispersion failure region mapping. The core region of inconsistent deformation is determined based on the displacement deviation data. The stress gradient distribution is calculated for the core region of inconsistent deformation. The stress gradient distribution is used to determine the location of stress transmission interruption. Blockage points on the transmission path are simulated based on the stress transmission interruption locations. If blockage points exist, the local stiffness changes of the mesh around the blockage points are analyzed. The stiffness reduction region is obtained through the local stiffness changes. A stability assessment model is constructed based on the stiffness reduction region. The key mesh elements are determined using the stability assessment model.

[0076] For example, when using a finite element analysis model to simulate the sliding process of polymer materials, the molecular chain structure can be divided into a surface mesh and an internal mesh to more accurately capture the response differences under velocity changes.

[0077] Specifically, by refining the surface mesh density, the deformation characteristics caused by surface friction can be better reflected, while the internal mesh is kept relatively coarse to improve computational efficiency.

[0078] In one possible implementation, when the sliding speed is 0.3 m / s, the deformation difference calculation shows that the displacement of the surface mesh is significantly greater than that of the inner mesh. This difference directly reflects that the stress dispersion failure area is mainly concentrated at the interface where the surface transitions to the interior.

[0079] Understandably, this mapping helps identify the initiation point of surface fatigue that may still occur in materials under low-speed sliding.

[0080] For example, when extracting displacement deviation data from the stress dispersion failure region mapping, the deviation value can reach over 0.15 nanometers in a scenario where the velocity increases to 0.7 m / s, and is mainly distributed in the surface mesh nodes. This displacement deviation data clearly identifies the core region of deformation inconsistency as being located in the subsurface layer near the surface, thus providing precise localization for subsequent targeted analysis.

[0081] Specifically, when calculating the stress gradient distribution for the core region with inconsistent deformation, it was found that the gradient increases sharply at the edge of the core region, and at a velocity of 1.2 m / s, the gradient value can be about twice as high as that of the surrounding region. This distribution characteristic helps to reveal that the stress transmission interruption usually occurs at the boundary between the core region and the stable internal mesh.

[0082] For example, the blockage points on the transmission path can be further simulated by stress gradient distribution.

[0083] In one embodiment, when the speed reaches 1.8 m / s, the blocking point clearly appears in several grid cells at the boundary. The presence of this blocking point directly affects the overall stress transfer efficiency, indicating that the material is prone to local failure under high-speed sliding.

[0084] In one possible implementation, if the existence of the blocking point is confirmed, the local stiffness variation of the surrounding mesh is analyzed, and a decrease in stiffness of approximately 15% to 20% can be observed near the blocking point. This variation helps to quickly identify the area of ​​stiffness reduction, which is mainly concentrated on the stress transmission path downstream of the blocking point.

[0085] For example, when constructing a stability assessment model based on the stiffness reduction region, the aforementioned stiffness data and displacement deviation can be integrated to form a comprehensive assessment index. In a simulation at a speed of 1.0 m / s, the model shows that the stability score of the stiffness reduction region is significantly lower than that of other parts, providing a reliable basis for predicting the overall durability of the material.

[0086] Specifically, the key mesh elements are ultimately determined through a stability assessment model. These elements often highly coincide with the blocking points and stiffness reduction regions.

[0087] In one embodiment, critical mesh elements, comprising less than 5% of the total mesh, contribute over 30% of the potential failure risk. This identification helps to prioritize strengthening these elements, improving the structural stability and fatigue resistance of the material under variable-speed sliding conditions.

[0088] Step S104: Extract the key regions of wear resistance degradation from the obtained stress dispersion failure region map, determine whether the deformation inconsistency leads to the breakage of surface molecular chains, and obtain the performance fluctuation evaluation index.

[0089] The critical regions for wear resistance degradation are extracted from the stress dispersion failure region mapping. The surface molecular chain stress regions are then divided based on these critical regions. The tensile deformation of the surface molecular chains is calculated for each stress region. The tensile deformation is used to determine if the deformation inconsistency exceeds a preset threshold. If the inconsistency exceeds the preset threshold, the location of surface molecular chain fracture is determined. The fracture density distribution is obtained based on the fracture location. Performance fluctuation evaluation indicators are derived from the fracture density distribution.

[0090] For example, in the simulation of sliding friction of polymer materials, the key regions of wear resistance degradation can be extracted from the stress dispersion failure region mapping, which can accurately identify the vulnerable parts of the surface layer.

[0091] Specifically, this extraction is based on deformation difference data from previous finite element models. When the sliding speed is 0.5 m / s, the key range of wear resistance degradation is mainly located in the surface depth range of 0.1 to 0.3 micrometers. This range division helps to reveal the local weakening caused by frictional heat accumulation.

[0092] In one embodiment, the surface layer can be divided into a high-stress zone and a transition zone by dividing the surface molecular chain stress zone according to the critical range of wear resistance degradation.

[0093] For example, the high-stress zone corresponds to the direct contact surface, where the molecular chains bear the maximum shear force, while the transition zone is indirectly affected. This division optimizes the targeting of subsequent deformation analysis.

[0094] It is understandable that when calculating the tensile deformation of the molecular chain in the stress zone of the surface molecular chain, it was found that the deformation in the high stress zone can reach 8% to 12% of the original length.

[0095] Specifically, in a simulation at a speed of 0.8 m / s, the tensile deformation was significantly higher in the high-stress region than in the transition region. This difference directly reflects the uneven chain segment extension caused by friction. The amount of tensile deformation of the molecular chains is used to determine whether the deformation inconsistency exceeds a preset threshold. If it exceeds a threshold such as 5%, it indicates an increased potential risk of fracture. For example...

[0096] In one possible implementation, when the deformation reaches 10%, the deformation inconsistency exceeds a threshold, providing a basis for timely intervention. If the deformation inconsistency exceeds a preset threshold, the location of surface molecular chain breakage is determined, mainly concentrated at nodes in high-stress areas.

[0097] In one embodiment, the fracture locations are often distributed along the friction direction, which helps predict the wear initiation point. Based on the fracture density distribution obtained from the locations of surface molecular chain fractures, it can be observed that the density is highest at the contact center.

[0098] For example, at a speed of 1.0 m / s, the fracture density can reach 5 to 8 points per square micrometer, and this distribution reveals the spatial characteristics of wear evolution. Performance fluctuation assessment indicators can be obtained through the fracture density distribution, enabling the quantification of changes in material durability.

[0099] Specifically, the index integrates the peak density and distribution breadth. Under high-speed sliding, the index increases by more than 20%. This assessment helps to optimize polymer formulations, improve overall wear resistance, and extend service life.

[0100] Step S105: For the obtained performance fluctuation evaluation index, molecular dynamics simulation is used to iteratively optimize the molecular chain arrangement parameters and determine the adjustment scheme to achieve consistent deformation under different sliding speeds.

[0101] Initial values ​​of molecular chain alignment parameters are obtained based on performance fluctuation evaluation indicators. Molecular dynamics simulations are used to calculate the deformation distribution of molecular chain alignment parameters at different sliding speeds. The deformation distribution determines the deviation from the deformation consistency state. For the deviation from the deformation consistency state, it is determined whether the chain segment orientation angle deviates from a preset range; if so, the corresponding sliding speed variable is marked. Speed ​​intervals are defined based on the marked sliding speed variables. Molecular dynamics simulations are used iteratively to adjust the molecular chain alignment parameters within each speed interval until the alignment order metric converges. The optimized scheme result is obtained through the converged alignment order metric.

[0102] When obtaining the initial values ​​of molecular chain arrangement parameters based on performance fluctuation evaluation indicators, the peak value of fracture density and the distribution breadth reflected in the indicators can be used as a reference.

[0103] For example, under a sliding speed of 0.8 m / s, the performance fluctuation evaluation index increases by about 18%. In this case, an initial orientation angle of 30 to 45 degrees for the molecular chains can be selected as the initial value for the alignment parameters. This selection can better match the uneven stress characteristics of the surface molecular chains in previous simulations.

[0104] In one embodiment, molecular dynamics simulations are used to calculate the deformation distribution corresponding to the molecular chain arrangement parameters at different sliding speeds.

[0105] Specifically, simulations were conducted at multiple velocity points ranging from 0.2 m / s to 1.2 m / s. It was found that when the initial alignment angle was 40 degrees, the deformation distribution was relatively uniform under low-speed conditions. However, when the speed exceeded 0.9 m / s, the deformation concentrated in the surface layer at a depth of 0.1 to 0.25 micrometers. The deviation in deformation uniformity was determined by analyzing the deformation distribution.

[0106] For example, at 0.5 m / s, the deformation uniformity deviation is only 2.1%, while at 1.0 m / s, the deviation rapidly increases to 7.8%. This deviation reflects the degree of local stress concentration caused by the increased friction speed. The deformation uniformity deviation is used to determine whether the chain segment orientation angle deviates from a preset range; if it does, the corresponding sliding speed variable is marked.

[0107] Preferably, the preset range is set to ±15 degrees, and when the deviation exceeds 5%, the orientation angle is considered to have deviated.

[0108] For example, at 0.7 m / s, the deviation is 4.3%, and the angular deviation is only 8 degrees, so no marking is made; however, when the speed reaches 0.95 m / s, the deviation rises to 6.2%, and the angular deviation reaches 19 degrees, at which point the speed variable is marked as the critical point. The speed range is divided based on the marked sliding speed variable.

[0109] Understandably, speeds of 0.2 m / s to 0.7 m / s are typically classified as a low-speed, stable range; 0.7 m / s to 0.9 m / s is a transitional range; and speeds above 0.9 m / s are considered high-speed, high-risk ranges. This classification helps to optimize material performance under different operating conditions. Molecular dynamics simulations are used to iteratively adjust molecular chain arrangement parameters within each speed range until the metric for ordered arrangement converges.

[0110] For example, in the high-risk range, starting from an initial arrangement angle of 45 degrees, the iterations adjust by 2 to 5 degrees each time. After approximately 12 iterations, the order metric converges from 0.62 to 0.85. In the transition range, convergence is even faster, typically reaching above 0.81 in 6 to 8 iterations. The optimized solution is obtained through the converged arrangement order metric.

[0111] Specifically, when the order measure reaches 0.84 or higher, the corresponding optimization scheme is to control the initial orientation angle of the molecular chain between 28 and 35 degrees, and to give priority to the use of a formula with higher crystallinity.

[0112] In one possible implementation, when this optimization scheme is applied to polytetrafluoroethylene vinyl composite materials, the peak fracture density under high-speed sliding is reduced by about 25%, the performance fluctuation range is reduced by 18%, the surface wear resistance is significantly improved, and the service life is extended.

[0113] It should be noted that by following the complete chain described above, from back-deriving initial values ​​from indicators, simulating deformation distribution, dividing speed ranges, to iterative optimization of parameters, the intrinsic relationship between sliding speed and molecular chain arrangement can be systematically revealed, thus providing reliable guidance for the precise control of polymer wear resistance.

[0114] Step S106: Update the internal structure model through the determined adjustment scheme, obtain the balanced distribution of optimized stress dispersion, determine whether the wear resistance is stable across the entire speed range, and obtain the final microstructure adaptability change law.

[0115] The internal structural model is updated by optimizing and adjusting the scheme to obtain the stress dispersion equilibrium distribution state. For this stress dispersion equilibrium distribution state, a scan and comparison are performed across the entire velocity range to determine if it remains stable and consistent. If it does not remain stable and consistent, the velocity intervals with deviations are marked. For the deviations in the marked velocity intervals, the microstructure change response is calculated using molecular dynamics models. The adjustment amount of the chain segment rearrangement direction is determined based on the microstructure change response. The microstructure model is updated based on the chain segment rearrangement direction adjustment amount to obtain a new stress dispersion equilibrium distribution state. Through multiple iterations of the stress dispersion equilibrium distribution state, the adaptive change law of the microstructure is extracted.

[0116] By optimizing and adjusting the internal structural model, we can start with the orientation distribution and crystallinity of molecular chains to reconstruct the microscopic model, thereby achieving a more balanced stress transmission between the material's surface and interior. For example...

[0117] In one embodiment, when the molecular chain orientation angle in the initial model is concentrated around 35 degrees, the stress mainly accumulates at a depth of 0.15 micrometers on the surface. By adjusting the crystallinity to above 65% and dispersing the orientation angle to a range of 25 to 40 degrees, the updated model shows that the stress peak shifts inward by approximately 0.2 micrometers, thus achieving a stress dispersion and balanced distribution. This balanced state helps reduce the risk of local overload and improves the overall durability of the material. Scanning and comparing the stress dispersion and balanced distribution across the entire speed range reveals the stability at different sliding speeds.

[0118] Specifically, point-by-point scanning from 0.1 m / s to 1.5 m / s revealed that at a low speed of 0.3 m / s, the stress distribution deviation was only 1.8%, while at a high speed of 1.1 m / s, the deviation increased to 8.5%. If the deviation did not remain stable, the speed range with the deviation was marked.

[0119] For example, when the deviation exceeds 4%, speeds above 0.9 m / s are marked as high-speed deviation ranges. This marking facilitates subsequent targeted interventions to maintain the material's reliable performance across a wide speed range. Molecular dynamics simulations are used to calculate the microstructural change response for deviations within the marked speed ranges.

[0120] In one possible implementation, for the high-speed deviation range, simulations show that the chain segments tilt rapidly under shear force, leading to increased surface stress concentration. By tracking the chain segment's trajectory, it was found that the response time was reduced to 70% of its original value at 1.0 m / s, reflecting the dynamic instability caused by increased speed. The amount of chain segment rearrangement adjustment was determined by the response to microstructural changes.

[0121] For example, the response indicates that the chain segment needs to be shifted in the vertical sliding direction to alleviate concentration, and the adjustment amount can be set in the range of 12 to 18 degrees.

[0122] In one embodiment, a 15-degree adjustment resulted in a 20% reduction in surface stress and smoother internal stress transmission, demonstrating that this adjustment directly guides model optimization. The microstructure model is updated based on the chain segment rearrangement direction adjustment to obtain a new, balanced stress distribution.

[0123] Specifically, the updated model's deviation at 1.2 m / s decreased from 7.2% to 3.1%, and the stress distribution became more uniform. This iterative update helps to gradually approach the ideal state. By analyzing the stress dispersion equilibrium distribution after multiple iterations, the adaptive change law of the microstructure is extracted.

[0124] For example, after 8 to 15 iterations, the pattern shows that increasing the lateral crosslinking density preferentially within the deviation range can improve the adaptability to 1.4 times the original level.

[0125] It should be noted that this pattern reveals the intrinsic matching relationship between chain segment rearrangement and velocity, providing a precise basis for the structural design of polymer composites under variable speed conditions, ultimately significantly improving fatigue resistance and extending service life.

[0126] Step S107: Based on the obtained final microstructure adaptive change law, generate the stability improvement path of polymer material under complex working conditions, and determine the deep correlation description of the speed change on wear resistance.

[0127] The fluctuation of wear resistance performance under varying velocity loads was scanned based on the adaptive changes in the final microstructure. High-sensitivity velocity segments were then identified after assessing the fluctuations. Molecular dynamics simulations were used to calculate the chain segment conformational adjustment response for these segments. The energy barrier crossing direction was determined using the chain segment conformational adjustment response. Wear resistance stabilization parameters were extracted from the energy barrier crossing direction. These parameters were then used to update the polymer chain segment arrangement model. The updated polymer chain segment arrangement model was used to obtain the deep correlation mapping between velocity changes and wear resistance performance.

[0128] For example, when studying the fluctuations in wear resistance performance indicators under varying speed loads, one can start by analyzing the microstructural responses of the material's surface and interior to understand the impact of speed changes on wear behavior. During the scanning process, it is assumed that wear resistance indicators, such as wear rate, exhibit nonlinear fluctuations within the speed range of 0.2 m / s to 1.8 m / s, with particularly large fluctuations in certain speed ranges. By recording the trend of wear rate changes, it is possible to identify abnormally sensitive indicators near certain speed points, thus marking high-sensitivity speed ranges. For instance, if the wear rate fluctuation exceeds 15% of the baseline value within the range of 1.0 m / s to 1.3 m / s, this range is marked as highly sensitive, providing a key focus area for subsequent control.

[0129] For example, when using molecular dynamics simulations to calculate the conformational adjustment response of chain segments for highly sensitive velocity ranges, we can focus on the dynamic deformation behavior of molecular chains at specific velocities.

[0130] In one possible implementation, simulating the torsional and tensile behavior of chain segments under specific speed loads revealed that the segments tend to cluster locally within the high-sensitivity speed range, leading to uneven energy distribution. Analysis of this conformational adjustment response helps to reveal the microscopic mechanisms of accelerated wear, providing a theoretical basis for subsequent optimization.

[0131] For example, when determining the direction of crossing the energy barrier, the optimal direction can be identified by simulating the energy change path of the chain segment under force. Assuming that in the high-sensitivity speed range, the energy barrier that the chain segment needs to overcome is mainly concentrated on the lateral offset in the sliding direction, then the lateral offset can be determined as the primary crossing direction. This determination provides clear guidance for subsequent control.

[0132] For example, when extracting the stabilization control amount for wear resistance from the energy barrier crossing direction, specific adjustment parameters can be set based on simulation results. Suppose that analysis reveals the highest energy barrier crossing efficiency when the lateral offset angle of the chain segment is adjusted to the range of 10 to 15 degrees; this range can then be used as the stabilization control amount. This extraction of control amounts provides an operational basis for optimizing material properties.

[0133] For example, when updating the polymer chain segment arrangement model using wear resistance stabilization adjustment, the microscopic model can be reconstructed by adjusting the chain segment arrangement density and orientation. Assuming that in the high-sensitive speed range, the lateral offset angle of the chain segments is set to 12 degrees, while simultaneously increasing the density of local crosslinking points, the updated model exhibits more stable wear resistance behavior in simulations. This update method helps improve the material's adaptability under variable speed conditions.

[0134] For example, by obtaining the deep correlation between velocity change and wear resistance through the updated polymer chain segment arrangement model, a response curve between velocity and wear rate can be plotted. Assuming that within the range of 0.2 m / s to 1.8 m / s, the wear rate initially flattens out and then increases sharply with increasing velocity, with the most significant response occurring in the highly sensitive velocity range, this mapping relationship provides an important reference for subsequent material design, helping to optimize material performance under different operating conditions.

[0135] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A super wear-resistant polymeric sliding material ZMSM, characterized in that, It is prepared from a composition including ultra-high molecular weight polyethylene and additives; The additives include one or more of glass microspheres / glass fiber, carbon fiber, graphite, carbon black, coupling agent, stabilizer, lubricant, anti-wear agent, anti-aging agent and anti-chemical corrosion agent, which are used to enhance sliding properties, increase permissible pressure, extend service life, and give the material insensitivity to chemical contamination and aging.

2. The ultra-wear-resistant polymeric sliding material ZMSM according to claim 1, characterized in that: Based on 100 parts of ultra-high molecular weight polyethylene: The lubricant is selected from at least one of polytetrafluoroethylene micro powder, graphite, and molybdenum disulfide, and its mass fraction is 1 to 10 parts. The anti-wear agent is selected from at least one of nano-silica, nano-alumina, and silicon carbide, and its mass fraction is 0.5 to 5 parts; The anti-aging agent is selected from at least one of hindered phenolic antioxidants and phosphite antioxidants, and its mass fraction is 0.1 to 3 parts; The chemical corrosion resistant agent is selected from at least one of fluorinated ethylene propylene copolymer and perfluoroalkoxy resin, and its mass fraction is 0.5 to 5 parts.

3. The ultra-wear-resistant polymeric sliding material ZMSM according to any one of claims 1 to 3, characterized in that, The allowable pressure of the sliding material is ≥90MPa, which is more than twice that of the polytetrafluoroethylene sliding material; the applicable temperature range of the sliding material is -50℃ to +70℃. The coefficient of friction is ≤3% at -50℃, ≤2% at -35℃, and ≤1.5% at 5℃; the cumulative sliding displacement life of the sliding material is more than 5 times that of the polytetrafluoroethylene sliding material.

4. A process for preparing the ultra-wear-resistant polymeric sliding material ZMSM according to any one of claims 1 to 3, characterized in that, Includes the following steps: (1) Add ultra-high molecular weight polyethylene and additives to a mixing equipment according to the ratio, and perform dry mixing or melt blending to obtain a mixture; (2) The mixture is molded into a sliding material preform by compression molding, extrusion molding or injection molding process; (3) The sliding material blank is machined to form a sliding plate or bearing structure; (4) Optionally, the processed product is subjected to surface treatment, including at least one of polishing, calendering and cleaning.

5. The process for preparing an ultra-wear-resistant polymeric sliding material according to claim 4, characterized in that, In step 1: The dry mixing speed is 800-1500 rpm, and the mixing time is 5-20 minutes; The melt blending temperature is 190℃~230℃; In step (2): The compression molding temperature is 200℃~230℃, the pressure is 10~20MPa, and the holding time is 10~30 minutes; The screw speed for extrusion molding is 50–200 rpm, and the barrel temperature is 200℃–230℃. The sliding material structure is a sliding plate structure, and its structural form is: perforated on both sides, perforated on one side and smooth on the other side, or smooth on both sides; The thickness of the slide plate is 5-20mm, the hole diameter is 2-10mm, and the hole spacing is 5-30mm.

6. The method for improving the wear resistance stability of the ultra-wear-resistant polymeric sliding material ZMSM under complex working conditions according to any one of claims 1 to 3, characterized in that, The method includes: By collecting friction data of polymer materials at various sliding speeds, the initial state of molecular chain arrangement and deformation parameters are obtained, and a structural response dataset corresponding to the speed change is obtained. Based on the structural response dataset corresponding to the obtained velocity changes, molecular dynamics simulation methods are used to process the molecular chain alignment adjustment process and determine the distribution of the influence of sliding velocity on the internal structure's tensile and compressive stress. If it is determined that the influence of sliding speed on the tensile and compressive distribution of the internal structure exceeds a preset threshold, a mesh representation with inconsistent surface and internal deformation is constructed through a finite element analysis model to obtain the region mapping of stress dispersion failure. From the obtained stress dispersion failure region map, the key interval of wear resistance decline is extracted, and it is determined whether the deformation inconsistency leads to the breakage of surface molecular chains, so as to obtain the performance fluctuation evaluation index. Based on the obtained performance fluctuation evaluation index, molecular dynamics simulation was used to iteratively optimize the molecular chain arrangement parameters and determine the adjustment scheme to achieve consistent deformation under different sliding speeds. The internal structural model is updated by determining the adjustment scheme, the balanced distribution of optimized stress dispersion is obtained, the wear resistance is determined to be stable across the entire speed range, and the final microstructure adaptability change law is obtained. Based on the obtained adaptive change law of the final microstructure, a stability improvement path for polymer materials under complex working conditions is generated, and a deep correlation description of the effect of speed change on wear resistance is determined.

7. The method for improving the wear resistance stability of the ultra-wear-resistant polymer sliding material ZMSM under complex working conditions according to claim 6, characterized in that, The process involves collecting friction data of polymer materials at various sliding speeds to obtain the initial state of molecular chain arrangement and deformation parameters, resulting in a structural response dataset corresponding to speed changes, including: Friction data of polymer material surface under various sliding speeds were collected using variable speed friction experimental equipment, and the corresponding speed values ​​and friction force sequences were recorded. The frequency domain characteristics were obtained by using fast Fourier transform based on the friction force sequence to determine the dominant frequency of molecular chain vibration. The initial arrangement state of the molecular chain is determined by the relationship between the dominant frequency and the sliding speed. If the dominant frequency decreases as the speed increases, the initial arrangement of the molecular chain is determined to be an ordered orientation state. Deformation parameters are extracted from the time-domain sequence of friction data, and the elongation and recovery of molecular chains are determined by calculating the peak spacing of friction force. Clustering algorithms were used to group the combination of deformation parameters and sliding velocity to obtain molecular chain deformation parameter clusters in different velocity ranges; A structural response mapping table is constructed for the deformation parameter cluster to correlate sliding velocity and initial molecular chain alignment with deformation parameters; By fitting the relationship between sliding velocity and structural response in the structural response mapping table using a regression model, the evolution of molecular chain arrangement and deformation parameter changes under velocity variations are determined.

8. The method for improving the wear resistance stability of the ultra-wear-resistant polymer sliding material ZMSM under complex working conditions according to claim 6, wherein the step of using molecular dynamics simulation to process the molecular chain arrangement adjustment process based on the obtained structural response dataset corresponding to the velocity change, and determining the distribution of the influence of sliding velocity on the tensile and compressive properties of the internal structure, includes: By using molecular dynamics simulation methods, we extract the correlation data between sliding velocity and molecular chain arrangement adjustment from the structural response dataset, construct a dynamic behavior model of molecular chains at different velocities, and obtain the preliminary response mode of molecular chains. Based on the preliminary response mode, the effect of sliding speed on the stretching of the internal structure of the molecular chain is analyzed. The force distribution of the molecular chain at each speed is calculated using preset force field parameters to determine the regional distribution of the stretching effect. To address the regional distribution of the stretching effect, the compression effect of molecular chains under sliding speed is processed, local deformation data of molecular chains during compression is obtained, and the concentrated area of ​​the compression effect is determined. If the area of ​​concentrated stress due to compression overlaps with the area of ​​concentrated stress due to tension, stress concentration points of molecular chains within the overlapping area can be extracted through data comparison and analysis to obtain the key location of stress concentration. Based on the key locations of stress concentration, the overall stability of the internal structure of the molecular chain is analyzed, and molecular dynamics simulation tools are used to simulate the local stress at the key locations to identify the weak links in the internal structure. By using data from weak points, a distribution model of the influence of sliding speed on the internal structure of the molecular chain is constructed, detailed characteristics of the influence distribution are obtained, and the effect mode of sliding speed change on the overall response of the molecular chain is determined.

9. The method for improving the wear resistance stability of the ultra-wear-resistant polymer sliding material ZMSM under complex working conditions according to claim 6, wherein if the influence distribution of the sliding speed on the tensile and compressive properties of the internal structure exceeds a preset threshold, a mesh representation with inconsistent surface and internal deformation is constructed through a finite element analysis model to obtain the region mapping of stress dispersion failure, including: The finite element analysis model is used to divide the surface mesh into surface and internal meshes; The stress dispersion failure region mapping is obtained by calculating the deformation difference. Displacement deviation data is extracted from the stress dispersion failure region mapping. Determine the core area of ​​inconsistent deformation based on displacement deviation data; Calculate the stress gradient distribution for the core region with inconsistent deformation; The location where stress transmission is interrupted is obtained by analyzing the stress gradient distribution. Simulate the blocking point on the transmission path based on the location of stress transmission interruption; If an obstruction point exists, analyze the local stiffness variation of the mesh around the obstruction point; The region of reduced stiffness can be obtained by measuring local stiffness variations; A stability assessment model is constructed based on the stiffness reduction region; Key grid cells were identified using a stability assessment model.

10. The method for improving the wear resistance stability of the ultra-wear-resistant polymer sliding material ZMSM under complex working conditions according to claim 6, wherein the step of extracting the key intervals of wear resistance decline from the obtained stress dispersion failure region mapping, determining whether inconsistent deformation leads to surface molecular chain breakage, and obtaining performance fluctuation evaluation indicators includes: Extracting key regions of wear resistance degradation from stress dispersion failure region mapping; The stress zones of the surface molecular chains are divided according to the critical zones of wear resistance degradation. Calculate the tensile deformation of the molecular chains within the stress zone of the surface molecular chains; The amount of stretching deformation of the molecular chains is used to determine whether the inconsistency in deformation exceeds a preset threshold. If the deformation is inconsistent and exceeds a preset threshold, the location of the surface molecular chain breakage is determined. The fracture density distribution is obtained based on the location of surface molecular chain breakage. Performance fluctuation evaluation indicators are obtained through fracture density distribution; Based on the obtained adaptive change law of the final microstructure, a stability improvement path for polymer materials under complex working conditions is generated, and a deep correlation description of the effect of speed change on wear resistance is determined, including: The fluctuation of wear resistance performance indicators under variable speed loads is scanned based on the adaptive change law of the final microstructure. After obtaining the fluctuation of wear resistance performance indicators, mark the high-sensitivity speed range; Molecular dynamics simulations were used to calculate the chain segment conformational adjustment response for the high-sensitivity velocity range. The direction of energy barrier crossing is determined by adjusting the response through chain segment conformation. Extract the stabilizing and regulating amount of wear resistance performance from the direction of energy barrier crossing; The polymer chain segment arrangement model was updated using the wear resistance stabilization adjustment amount; The deep correlation mapping relationship between velocity change and wear resistance was obtained by updating the polymer chain segment arrangement model.

Images