60 results about "Boundary lubrication" patented technology

The invention relates to the technical field of hydraulic systems, in particular to a hydraulic and thermal fluid dynamic lubrication calculation model and an optimization method, comprising the following steps: S1, modeling a multi-scale heterogeneous system; s2, carrying out heat-friction-viscosity synergistic effect modeling; and S3, dynamic boundary lubrication and lubricant behavior prediction. According to the method, by integrating nanoscale, mesoscale and macroscopic level lubrication system modeling, physical phenomena on different scales and interaction of the physical phenomena are comprehensively captured, and the step covers multiple aspects of multi-scale heterogeneous system modeling, nanoscale lubrication behavior modeling, macroscopic fluid field and structure field coupling and the like; high-precision predictive capacity and systematic thermal management are achieved by combining multiple physical fields such as heat, friction, viscosity and fluid dynamics, through collaborative modeling of multiple scales and multiple physical fields, the accuracy and stability of a lubricating system are improved, a solid theoretical basis is provided for optimization design, and the method is suitable for popularization and application. And stable operation in high-load and high-temperature environments is ensured.

The invention relates to a micro-lubrication friction and resistance reduction method of a fullerene C60 nanosphere particle cutting fluid, and belongs to the field of metal cutting process methods and cutting lubrication. According to the method, through the steps of compressed air adjustment, fullerene nanosphere particle cutting fluid blending, oil-water mixing adjustment, three-phase mixed cutting fluid preparation, atomization spraying and the like, stable and tiny oil film water-drop-attached liquid drops are formed and accurately sprayed to a cutting area. The fullerene nanosphere particles can form a nano rolling boundary lubricating film with high bearing capacity and low shear strength on a tool-workpiece / chip contact interface due to unique properties, so that the friction coefficient is remarkably reduced, and the tool wear is reduced. Meanwhile, efficient cooling is achieved through the oil film water drop attaching technology, cuttings are blown away through high-pressure spraying, and tool abrasion and machining quality reduction caused by accumulation are avoided. According to the method, an efficient and accurate lubricating, friction-reducing and resistance-reducing solution is provided for metal cutting machining.

The invention discloses a preparation and application method of a super-lubricating coating based on a two-dimensional material. According to the invention, the charge density wave dynamic regulation and control mechanism of the fluorinated graphene and transition metal chalcogenide heterostructure is combined with the stress buffer characteristic of boron nitride, so that a slip interface with a low shear barrier is constructed on the atomic scale, and the energy dissipation in the friction process is remarkably reduced. A three-dimensional interpenetrating network of the helical carbon nanotubes and the hyperbranched polymer not only effectively inhibits stacking of two-dimensional materials, but also forms a multi-dimensional damage repair mechanism through solid-liquid phase change self-adaptive filling of the liquid metal and a boundary lubrication effect of the nano-diamond. Through the synergistic effect of the material system, the coating keeps the ultralow friction characteristic under the wide-range working condition, meanwhile, the coating has the composite protection capacity of abrasion resistance, high temperature resistance and corrosion resistance, and the intrinsic lubrication characteristic of the two-dimensional material is reserved while the compactness of the coating is guaranteed through the gradient cross-linking technology of ultraviolet curing and heat treatment.

The invention provides a bifunctional ionic liquid monomer, an ionic multifunctional viscosity index improver as well as a preparation method and application of the ionic multifunctional viscosity index improver, and belongs to the technical field of lubricating additives. A series of bifunctional ionic liquid monomers are synthesized through molecular design and have the functions of antifriction, wear resistance and cross-linking agents, then the monomers are copolymerized with long-chain alkyl methacrylate, and the ionic multifunctional viscosity index improver is prepared. The molecular structure of the viscosity index agent simultaneously contains an oleophylic alkyl chain, a rigid benzene ring structure and an ionic functional group, so that the solubility, the viscosity increasing performance and the viscosity-temperature performance of the viscosity index agent in base oil are remarkably improved; a biquaternary ammonium salt structure is introduced into a main chain to realize crosslinking of the polyion liquid, so that the tackifying performance of the polyion liquid is improved, phosphorus, sulfur and nitrogen heteroatoms are introduced, physical and chemical adsorption films can be formed on the metal surface, the friction coefficient and the abrasion volume are effectively reduced in the friction process, and the boundary lubricating performance is enhanced.

The invention belongs to the technical field of chains, and particularly relates to a precise chain roller with a smooth surface and abrasion resistance and a preparation method thereof. The invention provides a steel roller which is provided with a DLC final working surface on an excircle mirror surface, an excircle has no texture, and only an inner hole is provided with a micron-sized spiral microgroove. The process is implemented according to the sequence of carburizing / quenching / tempering-shot blasting-fine grinding-superfinishing-vacuum PVD, a diamond-like carbon composite coating is formed on an outer circle, and oil storage and capillary pumping are carried out through control of an outer edge fillet, residual compressive stress and DLC adhesive force and an inner hole microgroove, so that work division of antifriction bearing and oil supply functions is realized. A chain provided with the anti-abrasion precision roller with the smooth surface gives consideration to low friction, low noise and stripping resistance under the boundary lubrication and impact-rolling composite working conditions.

The invention discloses lubricating oil, a lubricating system and application thereof. The lubricating oil comprises base lubricating oil, a phosphide additive and tin telluride nanoparticles. In the lubricating oil disclosed by the invention, the phosphide additive and the tin telluride nanoparticles are matched with each other and can generate a film through friction reaction at a high temperature, so that the lubricating property of the basic lubricating oil at the high temperature is improved, and the boundary lubrication failure behavior is reduced.

The application discloses a kind of gear engagement loop resistance measurement based on gear face lubrication state judging method, belong to gear face lubrication technical field.This method includes: installation angle sensor identifies the engagement start-stop point of each gear tooth;Constant current is applied to collect loop resistance signal, and is divided into the engagement period resistance waveform of each gear tooth;The similarity matrix between waveform and the discrete degree value of its row mean are calculated, compared with the reference value under initial good lubrication state to obtain relative deviation degree;According to relative deviation degree, elastohydrodynamic lubrication, mixed lubrication or boundary lubrication state is judged, and the gear tooth number of similarity abnormality is output simultaneously.The application can also extract oil film extrusion depth coefficient and recovery residual coefficient, and identify lubricating film dynamic instability through inter-circle cross-correlation analysis.The method realizes gear tooth level lubrication state evaluation and abnormal positioning, is robust to working condition change, and is convenient for online monitoring and predictive maintenance.

The application provides a stainless steel calendering forming synergistic lubrication treatment method and a stainless steel plate, and belongs to the technical field of metal material plastic forming. The method comprises the following steps: performing laser micro-texturing treatment on a to-be-formed surface of a stainless steel plate to prepare a micro-pit array; coating a layer of composite nano-lubricant on the surface of the treated plate, wherein the lubricant comprises base oil, nano-solid lubricating particles, a surfactant and a polar additive; and finally performing calendering forming on the plate coated with the lubricant. The application also provides a corresponding stainless steel plate, which is provided with a micro-pit array on the surface, and the micro-pit is filled with the composite nano-lubricant. Through the synergistic effect of laser micro-texturing and the composite nano-lubricant, a stable and strong boundary lubrication film is formed at the calendering interface, the ultimate drawing ratio of the stainless steel is significantly improved, the mold wear is reduced, and the surface quality of the formed part is improved.

The invention relates to the technical field of ship propulsion systems, and particularly discloses a texturing-self-lubricating synergistically reinforced hub joint surface structure and a wear depth prediction method. The joint surface structure comprises a propeller hub and a crank pin disc, and the joint surface of the propeller hub adopts a partition micro-texture design: the periphery is a groove type micro-texture for guiding oil and discharging chips; and the inner side is a pit-shaped micro-texture and is used for storing oil and lubricating. A gradient nanocrystalline strengthening layer is formed on the combined surface of the crank pin disc through ultrasonic rolling treatment, and a self-lubricating material column is embedded in the combined surface in an interference pressing mode, so that solid lubrication and high bearing capacity are achieved. The wear prediction method comprises the following steps: calibrating a wear coefficient K through a fretting wear experiment; establishing a finite element model to simulate and obtain the distribution of the contact pressure P and the inching slip amplitude S; and substituting the P and S field data and the K value into an Archard model to calculate the wear depth, and generating a visual prediction cloud picture. Through the synergistic effect of the texture and the self-lubricating material, the boundary lubricating state is remarkably improved, the wear rate is reduced, wear distribution can be accurately predicted, a basis is provided for condition-based maintenance, and the service life of the controllable-pitch propeller is prolonged.

This invention belongs to the field of crankshaft technology, and specifically relates to a crankshaft, its manufacturing method, and its applications. The crankshaft of this invention includes a crankshaft body and a composite layer disposed on the surface of the crankshaft body; the composite layer includes a nitrided layer, a phosphate layer, and a lubricating layer arranged sequentially from the inside out. The nitrided layer improves the fatigue strength and wear resistance of the crankshaft. The phosphate layer formed on the nitrided layer serves as a base layer, providing a good adhesion foundation for the lubricating layer and improving the bonding between the phosphate layer and the lubricating layer, i.e., improving the bonding between the lubricating layer and the crankshaft body, allowing the lubricating layer to better perform its function of reducing friction and wear. When the crankshaft-bearing friction pair enters the boundary lubrication state, the lubricating layer is consumed first, forming a solid lubrication transfer film on the bearing surface. This avoids direct contact between the crankshaft's nitrided layer and the bearing, while also achieving a friction-reducing and lubricating effect, thus improving the wear of the crankshaft-bearing friction pair.

The invention discloses a micro-emulsified metal cutting fluid, and relates to the technical field of lubricating compositions, the micro-emulsified metal cutting fluid comprises the following components by weight: 10-30 parts of base oil, 10-20 parts of a nonionic surfactant, 5-15 parts of a substance A, and 30-60 parts of water, the substance A has a cross-linked network structure, and the substance B has a cross-linked network structure. The substance A is obtained by carrying out cross-linking polymerization on amino boric acid ester and hydroxyl-containing unsaturated polyester resin. The amino boric acid ester and the hydroxyl-containing unsaturated polyester resin are subjected to cross-linking polymerization to obtain a substance A with a cross-linked three-dimensional network structure, and the substance A is added into the basic liquid, so that the boundary lubricating capacity of the metal cutting fluid can be improved when the metal cutting fluid is applied to aerospace high-temperature alloy processing.

The invention discloses a self-reaction lubricating coating for a hydraulic element and a preparation method of the self-reaction lubricating coating. The preparation method comprises the steps of substrate pretreatment, Cr bottoming, preparation of a gradient layer and a W-doped diamond-like layer and the like. The coating structure is composed of a Cr bottom layer, a Cr / C gradient layer, a W / C gradient layer and a W-DLC top layer, the mechanical property transition between a base body and the coating is uniform through the gradient polycrystalline layer structure design, and therefore the bonding strength between the coating and the base body is greatly improved. The W element doped in the coating can improve the microstructure integrity of the whole coating by forming WO3 and WC nanoclusters. Meanwhile, WO3 has very high catalytic activity, so that reactivity of the coating and a lubricant can be improved beneficially, and formation of a chemical reaction film on the surface of the coating is promoted. The chemical reaction film can continuously reduce the friction wear degree of direct contact between friction pairs at the local contact part in the mixed lubrication state and in the boundary lubrication state after the oil film is completely broken, and the service life of the hydraulic element is prolonged.

The application discloses a microemulsified metal cutting fluid, relates to the technical field of lubricating compositions, and comprises the following components in parts by weight: base oil 10-30 parts, non-ionic surfactant 10-20 parts, substance A 5-15 parts, water 30-60 parts, and substance A has a crosslinked network structure, wherein the substance A is obtained by crosslinking polymerization of amino borate and unsaturated polyester resin containing a hydroxyl group. The amino borate and the unsaturated polyester resin containing the hydroxyl group are crosslinked and polymerized to obtain the substance A with the crosslinked three-dimensional network structure, and the boundary lubricating capacity of the metal cutting fluid in the aerospace high-temperature alloy machining application can be improved by adding the substance A into the base fluid.

The invention belongs to the technical field of organic silicon lubrication, and particularly relates to a long-chain alkyl modified organic silicon composition and a preparation method thereof. The composition comprises long-chain alkyl modified organosilicon base oil, hydrocarbon base oil, an anti-wear reagent at extreme pressure and an optional composite functional additive in specific parts by weight. Wherein the long-chain alkyl modified organic silicon base oil has the following molecular structure, R is C8-C12 alkane, the value of m is 12-16, the value of n is 1-4, and n / m is 0.1-0.3. According to the composition, the compatibility with a conventional additive is remarkably improved while the low viscosity is maintained, so that the antifriction and extreme pressure antiwear properties in a boundary lubrication state are greatly improved.

A method for preparing a liquid metal / ionic liquid composite lubricating functional additive with a three-layer core-shell structure belongs to the field of high-performance lubricating materials under extreme working conditions. The present invention utilizes the advantages of liquid metal such as low melting point, high temperature resistance, and easy flow, and adopts a simple ultrasonic dispersion method to prepare a liquid metal / ionic liquid composite lubricating functional additive. The present invention characterizes the surface condition of liquid metal modified by ionic liquid, and explores the extreme pressure performance and anti-wear and friction reduction properties of ionic liquid with different addition amounts of liquid metal. The results show that the ionic liquid improves the liquid metal particles to present a core-shell structure, and a layer of ionic liquid film adheres to the surface of the liquid metal. After adding LM, the organic groups attached to the surface of the friction pair can effectively protect the interface of the friction pair. At the same time, the boundary lubrication film generated by the friction-induced chemical reaction can effectively improve the load-bearing capacity and anti-wear and friction reduction performance of the lubricant. Its excellent lubrication performance makes it more widely used in existing fields or unknown fields.

The application discloses a functionalized graphene oxide nano drug carrier and a preparation method. The application covalently grafts phospholipid and hyaluronic acid with a certain structure on two sides of graphene oxide, and obtains a nano drug carrier with stable positive charge on one side and stable negative charge on the other side in an arthritic inflammatory environment through design of the grafted structure. The nano drug carrier can be targetedly adsorbed on the negatively charged cartilage surface in a sliding joint interface, and self-sequencing nano drug carrier layers with stable layered gradient structures are formed on the cartilage surface along with shear stress. The stable nano drug carrier layer integrates drug loading, fluid lubrication of hyaluronic acid, boundary lubrication of graphene oxide and hydration super-lubrication of phospholipid, and can stabilize drug delivery while fully guaranteeing good lubrication effect of the joint in different movement states.

The invention relates to the technical field of piston manufacturing, in particular to an over-boundary lubrication piston pin hole structure, micro oil grooves are formed in the inner surface of a piston pin hole, the micro oil grooves are of a continuous or discontinuous spiral structure and extend in the axial direction of the piston pin hole, and micro cutter line areas are arranged on the inner surface of the piston pin hole and located between every two adjacent micro oil grooves. A plurality of ring grooves are formed in the micro-cutter line area at intervals in the axial direction of the piston pin hole. The high-pressure-bearing and boundary lubricating miniature oil groove is formed in the surface of the piston pin hole, the lubricating performance between the piston pin and the piston pin hole is improved, abrasion is reduced, the bearing capacity of the piston pin hole and the piston pin is further enhanced, and the reliability and durability of an engine are improved.

This invention belongs to the technical field of surface protective coatings for sliding bearings, specifically relating to a sliding bearing, its preparation method, and its application. The sliding bearing includes a bearing substrate and a surface protective coating disposed on its surface. The surface protective coating is prepared from polyamide-imide resin, modified tin whiskers, graphite, and molybdenum disulfide. The modified tin whiskers, treated with a silane coupling agent, have a specific diameter and aspect ratio, forming a three-dimensional thermally conductive network with graphite and molybdenum disulfide within the resin substrate. Under boundary lubrication conditions, they synergistically induce the formation of a continuous and uniform composite solid lubrication transfer film. This invention also provides a method for preparing the sliding bearing, including dispersing the components in a solvent to obtain a composite slurry, coating it onto the surface of the bearing substrate, and curing it through a gradient temperature rise process to obtain the finished product. This sliding bearing possesses both excellent thermal conductivity and heat dissipation performance and an ultra-low coefficient of friction, exhibiting excellent anti-scratch capability, self-lubricating properties, and operational stability under extreme operating conditions.

The invention relates to the technical field of mining equipment maintenance, in particular to an intelligent lubrication system based on a mine red, and the system comprises a data acquisition unit which is used for acquiring real-time data of an oil product and an operation condition of mining equipment; the prediction unit is used for calculating an oil film safety margin coefficient according to the real-time data, and predicting a minimum prediction value of the oil film safety margin coefficient in a prediction window based on a short-time prediction model; and the lubrication unit is used for generating an advanced lubrication instruction when the minimum prediction value is smaller than or equal to a preset safety lower limit in the prediction window. When the prediction result shows that the oil film safety margin coefficient is about to be lower than the preset safety lower limit, the system can generate and issue a lubrication instruction in advance, so that the lubrication operation is timely intervened before the oil film fails, and the phenomenon of friction pair boundary lubrication or dry friction caused by lubrication opportunity lag in a traditional fixed period lubrication mode is avoided; therefore, the wear rate is reduced, the service life of equipment is prolonged, and non-planned shutdown is reduced.

The invention provides a rapidly biodegradable rolling liquid composition as well as a preparation method and application thereof. The rolling liquid composition comprises the following components in parts by weight: 82.0-94.0 parts of a boundary lubricant; 3.0-9.0 parts by weight of an anti-wear reagent at extreme pressure; 2.0 to 5.0 parts by weight of a surfactant; 1.0 to 4.0 parts by weight of an antioxidant preservative; wherein the boundary lubricant comprises a main boundary lubricant and an auxiliary boundary lubricant, the main boundary lubricant is selected from one or more of oxidized vegetable oil, coconut oil and palm oil, and the auxiliary boundary lubricant is selected from one or more of isooctyl palmitate, trimethylolpropane fatty acid ester and pentaerythritol fatty acid ester. And the weight ratio of the main boundary lubricant to the auxiliary boundary lubricant is (8-1): 1. The biodegradable rolling liquid composition has good biodegradability, and can be used for processing stainless steel, plain carbon steel and other multi-material metals.

The invention relates to the technical field of wear resistance of methanol fuel, in particular to an ester anti-wear agent, a preparation method and application, the molecular structural formula of the ester anti-wear agent is R-(OCH2CH2OCH2CH2O)-R, and R is C4-C8 branched chain alkyl. The ester anti-wear agent shows excellent environmental adaptability and functional compatibility through the synergistic effect of an ester-alkyl binary structure. The introduction of branched chain alkyl further optimizes the molecular spatial configuration, C4-C8 branched chain alkyl reduces intermolecular internal friction through a steric hindrance effect, and the branched chain structure can be embedded into micro pits in the surface of a friction pair to form a physical adsorption film, so that the boundary lubricating property is enhanced. Oxygen atoms in the ester group have strong electronegativity and can chemically react with the surface of a friction pair at high friction temperature to generate a chemical protective film containing oxides, and the chemical protective film can bear instantaneous high pressure, effectively prevent direct contact of the metal friction pair and reduce the wear rate; the problems that in the prior art, an anti-wear agent is high in viscosity and poor in lubricating performance are solved.

The invention discloses a method for establishing measurement and evaluation of engine oil pressure based on abrasion, belongs to the technical field of engine abrasion evaluation, and solves the technical problem that an existing abrasion measurement and evaluation method is large in deviation. The method comprises the following steps of 1, measuring the rotating speed of an engine in the starting process, and accumulating the number of turns of a crankshaft before oil pressure is established; step 2, converting into a sliding distance of a crankshaft bearing or a piston according to the number of turns of the crankshaft; 3, according to the sliding distance, calculating abrasion in boundary lubrication and dry friction states through an abrasion model; and 4, evaluating the rationality of the engine starting pressure buildup according to the wear. Abrasion is calculated according to the sliding distance of the crankshaft bearing or the piston, the influence of starting transient performance can be reduced, the difference from the actual abrasion condition is small, and starting abrasion can be measured and evaluated more visually and quantitatively.

The invention relates to an ultralow-friction high-temperature self-lubricating material which is composed of a WB4 phase and a beta-B phase which are prepared from 90-92.3% of B powder and 7.7-10% of W powder according to atomic percent, the friction coefficient of the ultralow-friction high-temperature self-lubricating material under the ultrahigh temperature condition of 1100 DEG C is smaller than or equal to 0.18, and the wear rate is 10 <-5 > mm < 3 > / Nm order of magnitude. According to the invention, molten B2O3 and layered WO3 are formed in situ in an ultrahigh-temperature environment, and a mixed lubrication mode of fluid lubrication and boundary lubrication is constructed on a friction interface, so that ultrahigh-temperature ultralow friction is realized. The technical requirement of low friction at extreme high temperature in modern industry is met, and a technical path is provided for the design and preparation technology of an ultrahigh-temperature lubricating material.

The invention provides a phenolic resin lubricating coating and a preparation method thereof, and belongs to the technical field of polymer self-lubricating composite materials. The phenolic resin lubricating coating comprises the following components in percentage by mass: 89%-99% of phenolic resin, 0.5%-10% of lanthanum oxide and 0.5%-1% of an auxiliary agent. The lanthanum oxide is added for formula optimization, other solid lubricants are omitted, the bearing capacity and the easy-to-shear lubrication characteristic of the lanthanum oxide are utilized, a transfer film with the solid lubrication characteristic and the high bearing capacity is generated in the friction process of PF under the friction shear action, direct contact of a friction matching pair is avoided, and the friction matching pair is prevented from being damaged. According to the lubricating oil, the defect of an oil film under boundary lubrication is remarkably overcome, the frictional wear between a phenolic resin lubricating coating and a metal matching pair is greatly improved, and the lubricating oil shows excellent tribological performance under a harsh oil lubrication condition and has relatively low friction coefficient and wear rate.

A method for assisting in observing a plastic deformation layer of an ultra-high molecular weight polyethylene wear interface through a groove comprises the following steps: pretreating a test piece, processing the groove, polishing the polyethylene test piece, processing the groove, and finely grinding the edge of the groove to obtain the test piece with the groove; the obtained test piece with the groove is clamped on a friction and wear testing machine through a clamp, a coloring agent solution is dropwise added to the friction surface of the test piece with the groove, a stainless steel pin serves as a pair of abrasion pairs, friction is conducted by adjusting parameters, and the test piece is taken out, transferred to an optical microscope platform and observed. And obtaining the elongation of the plastic deformation layer corresponding to different friction times, and establishing a curve. According to the method, a groove structure is constructed on the surface of a test piece, the structure provides a physical boundary for growth of a plastic deformation layer, the size of the plastic deformation layer is measured by means of a dyeing method, and the cumulative plastic damage process of a material under the boundary lubrication / dry friction working condition is directly quantified through the extension trend of the plastic deformation layer under different friction durations.

The invention provides diamond wire cutting cooling liquid for silicon carbide wafer cutting, and particularly relates to the field of silicon carbide cutting liquid. The cutting coolant comprises the following components in parts by weight: 5-20 parts of polyol ester, 10-30 parts of fatty alcohol polyoxyethylene polyoxypropylene ether, 0.5-15 parts of poly (4-vinyl benzyl-tri (2-cyanoethyl) phosphonium chloride, 1-5 parts of a catalyst, 1-5 parts of a defoaming agent and 1-5 parts of an antioxidant. The cleaning agent is prepared from the following components in parts by weight: 0.01 to 1 part of aromatic acid, 0.05 to 2 parts of macromolecular viscosity modifier, 0.05 to 5 parts of zinc dialkyl dithiophosphate, 2 to 20 parts of alkynediol gemini surfactant, 0.1 to 2 parts of pH regulator, 0 to 20 parts of organic solvent, 0.02 to 2 parts of organic silicon defoaming agent and 10 to 50 parts of deionized water. The diamond wire cooling liquid for silicon carbide wafer cutting provided by the invention has the characteristics of large boundary lubricating film thickness and high boundary lubricating film strength. The cutting mode of the silicon carbide wafer from the diamond powder abrasive mortar and the steel wire is replaced by the diamond wire cutting mode, and the purposes of improving the cutting efficiency, reducing TTV, improving surface line marks and reducing the smudginess rate are achieved.

This invention discloses a spinning oil specifically for dry-knitting spandex warp yarns. The spinning oil comprises 80-93% fluid lubricant, 3-10% emulsifier, 0.5-5% antistatic agent, 0.1-2% unwinding aid, and 0.5-5% boundary lubricant, all by weight. This invention introduces a boundary lubricant comprising one or more of ionic surfactants, modified silicone, polyethers, and aliphatic compounds. The introduction of the boundary lubricant forms an effective protective film on the fiber surface, improving oil film strength, reducing the coefficient of friction between the fiber and processing equipment, reducing wear and breakage during subsequent warping and weaving processes, minimizing fabric defects, and improving production efficiency.

The invention relates to a shaft-bearing bush part friction wear performance rapid test method, which utilizes a shaft-bearing bush friction wear testing machine to carry out experiments, adopts a finished product bearing bush in practical application, and uses a straight shaft to simulate a crankshaft journal, and the material and the surface treatment process of the straight shaft are consistent with those of the crankshaft journal. The test is carried out under the conditions of low speed (1-500rpm) and heavy load (5-120MPa), so that the shaft-bearing bush can relatively slide in a boundary lubrication or mixed lubrication state, rapid and stable wear is realized, and the method can rapidly evaluate the friction wear performance of the shaft-bearing bush at the part test level. The device has high flexibility, and shafts and bearing bushes of different materials, different sizes and different surface treatment processes can be replaced according to different requirements. The test result can be quickly obtained, the stability and repeatability are good, and a reliable method is provided for testing the friction and wear performance of the shaft-bearing bush. The application of the method can enhance the performance analysis and optimization of the shaft-bearing bush system.

The invention provides modified MQ silicon resin, a preparation method thereof, sealing grease and modified MQ silicon resin, the structure of the modified MQ silicon resin is # imgabs0 #, R1, R2, R3 and R4 are siloxane respectively, and R5, R6, R7 and R8 are phosphate ester groups or thioether groups respectively. The modified MQ silicon resin is of a star-shaped structure and contains phosphate groups and / or thioether groups, when the modified MQ silicon resin is applied to the sealing grease, the sealing grease has higher shear stability and adhesiveness, and the water washing resistance of the sealing grease is improved; moreover, phosphate groups or / and thioether groups can form a layer of boundary lubricating film composed of phosphorus-containing and / or sulfur-containing micromolecules and metal oxides on the metal surface, so that the metal surface is smooth and flat, the catalytic action of metal on oxidation is effectively hindered, the corrosion of corrosive substances on the metal surface is reduced, and the service life of the metal surface is prolonged. And a protective layer with low shear strength can be formed, so that the purpose of reducing surface friction and loss of a metal friction pair is achieved.

The invention belongs to the technical field of dies, and particularly relates to a starlike sleeve machining die for automobile parts, which comprises a main body, a starlike sleeve machining die and a gradient lubricating film mechanism, the starlike sleeve machining die is arranged on the main body, and the gradient lubricating film mechanism is arranged on the main body; the gradient lubricating film mechanism comprises a graphite atomization assembly, a spraying assembly, a first cooling assembly and a second cooling assembly, the graphite atomization assembly is arranged on the gradient lubricating film mechanism, the spraying assembly is arranged on the gradient lubricating film mechanism, the first cooling assembly is arranged on the gradient lubricating film mechanism, and the second cooling assembly is arranged on the gradient lubricating film mechanism; through the arrangement of the gradient lubricating film mechanism, the atomized graphene aqueous solution and the atomized anti-freezing solution are mixed, lubricating films can be formed on the inner walls of the upper mold core and the lower mold core, the films have the interlayer slippage characteristic of graphene and boundary lubrication assistance of the anti-freezing solution, the metal flowing resistance is reduced, and the channel filling rate is increased.