1542 results about "Lubricity" patented technology

The invention provides a polysilazane green special refractory ceramic coating and a preparation method thereof, and belongs to the field of ceramic coatings. The ternary core material composed of titanium carbide, zirconium boride and silicon nitride provides high hardness, oxidation resistance, thermal shock resistance and excellent thermal stability; the silicon dioxide-aluminum oxide composite shell layer remarkably improves the oxidation resistance and reliability of the coating through the synergistic oxidation resistance and crack self-repairing function; the multi-metal oxygen cluster network endows the coating with excellent electrical conductivity, thermal conductivity and corrosion resistance; the intercalated montmorillonite enhances the crack resistance and oxidation resistance through a layered structure and embedded active ions; and the boron nitride coated vanadium carbide particles provide lubricity, oxidation resistance and wear resistance. Through collaborative optimization of multiple components, the comprehensive performance of the coating is comprehensively improved in the aspects of oxidation resistance, thermal conductivity, interface stability, high-temperature performance, mechanical performance and the like, so that the coating shows excellent long-term stability and functionality in an extreme environment.

There is provided a sliding component that supplies a sealed fluid to a leakage side in a gap between sliding surfaces to exhibit high lubricity and has a small leakage of the sealed fluid. A sliding component that has an annular shape and is disposed in a place where relative rotation is performed in a rotary machine, includes a plurality of dynamic pressure generating mechanisms provided in a sliding surface of the sliding component, each of the dynamic pressure generating mechanisms including a deep groove portion that communicates with a leakage side, and a plurality of shallow groove portions that communicate with the deep groove portion and are arranged in a circumferential direction in parallel relationship to each other.

The invention relates to the technical field of gear oil injection, and provides a power plant coal mill bull gear oil spraying device which comprises an oil storage tank used for storing oil, one side of the oil storage tank is communicated with a pump body provided with two liquid outlets, the two liquid outlets of the pump body are communicated with a spraying assembly in a coal mill gearbox through oil injection pipes, and the spraying assembly is communicated with the oil storage tank. The spraying assembly is driven by an electric push rod to be stored, a cavity is formed in the other side of the oil storage tank, a motor is installed in the cavity, and two cooling pipes in the oil storage tank are located on the outer wall of the motor in a spiral mode so that energy transmission between the cooling pipes and the motor can be achieved. The phenomenon that the spray head is blocked due to exposure in air is avoided, the spraying efficiency of lubricating oil is ensured, meanwhile, the flowability and the lubricating performance of the lubricating oil are ensured through energy conversion, the lubricating effect is improved, gear abrasion is reduced, the service life of the gear is prolonged, and on the contrary, a certain cooling effect can be achieved on the motor.

The invention relates to a stern bearing lubrication characteristic analysis method coupled with the influence of three-dimensional vibration of a stern shaft, and the analysis method comprises the steps: S1, inputting global parameters into a bearing lubrication performance and kinetic parameter calculation module and a propulsion shaft system vertical, horizontal and torsional three-dimensional vibration calculation module, and completing the corresponding calculation; s2, obtaining a bearing transfer matrix; s3, obtaining a system transfer matrix; s4, the forced vibration calculation module completes corresponding calculation; s5, a bearing relative position feedback module completes corresponding calculation; and S6, judging whether the calculation of one work cycle is completed or not, and storing and outputting the working characteristic result of the stern shaft-stern bearing in the cycle. By designing a bearing lubrication performance and kinetic parameter calculation module and a propulsion shafting vertical and horizontal torsion three-dimensional vibration calculation module, the vibration and lubrication coupling effect between a stern shaft and a stern bearing is fully considered, and a stern shaft vertical and horizontal torsion three-dimensional vibration and stern bearing lubrication characteristic bidirectional coupling model is established. And a vibration lubrication mutual feedback mechanism under a complex vibration condition is disclosed.

The invention relates to the technical field of rubber materials, in particular to a rubber composite material with self-lubricating and wear-resistant characteristics and a preparation method thereof. The rubber composite material with self-lubricating and wear-resistant characteristics is prepared from the following raw materials in parts by mass: 70 to 75 parts of nitrile rubber, 15 to 18 parts of carbon black, 30 to 35 parts of self-lubricating filler, 2 to 3 parts of plasticizer, 2 to 3 parts of zinc oxide, 2 to 3 parts of zinc stearate, 3 to 5 parts of coupling agent, 4 to 6 parts of self-lubricating additive, 1 to 1.5 parts of anti-aging agent, 1 to 1.5 parts of accelerant and 2 to 4 parts of vulcanizing agent. The prepared rubber composite material with self-lubricating and wear-resistant characteristics has excellent lubricating property, wear-resistant property and mechanical property. The method is suitable for the fields of automobile manufacturing, mechanical manufacturing, aerospace and the like.

The invention provides an enhanced heat conduction lubrication type ball bearing for an X-ray tube and a CT bulb tube. The enhanced heat conduction lubrication type ball bearing comprises a bearing sleeve, a sealing end cover, a bearing raceway, a fixing shaft, a sealing baffle and a ball. A bearing cavity for accommodating the bearing raceway is formed in the bearing sleeve, the bearing cavity is filled with liquid metal, gaps among the bearing raceway, the balls and the fixed shaft are filled with the liquid metal, and the fixed shaft is filled with a flowing heat dissipation medium; the two ends of the bearing sleeve are a closed end and an open end respectively, a sealing step is arranged at the open end, movable sealing grooves are formed in the end face of the sealing step and the end face of the sealing end cover, each movable sealing groove comprises two flow channels intersecting at an acute angle, and a sealing groove and a backflow hole communicated with the movable sealing grooves and the sealing groove are formed in the sealing end cover. The anode assembly has good lubricity, heat dissipation capacity and conductivity, the operation stability is improved, the service life is prolonged, and the heat dissipation power of the anode assembly is greatly improved.

The invention discloses a high-strength wear-resistant self-lubricating drill bit for a coal mine and a preparation method of the high-strength wear-resistant self-lubricating drill bit. The preparation process comprises the steps that a drill bit blank is prepared from low-alloy carbon structural steel, a high-strength and high-toughness matrix is obtained through thermal refining, and then sand blasting activation is conducted to clean and coarsen the surface. After diamond particles are subjected to acid pickling pretreatment, metal modified diamond composite powder is obtained through salt bath metal and reduction prefabrication. The preparation method comprises the following steps: mixing MoS2 with the carbon dioxide, spraying the mixture on the surface of a matrix through high velocity oxy-fuel to form a wear-resistant coating, and then improving the density and interface bonding strength of the coating through high-frequency induction instantaneous remelting, thereby finally obtaining the coal mine drill bit with high hardness, strong bonding force and self-lubricating performance. The metal modified diamond composite coating containing the metal transition layer and the MoS2 lubricating phase is constructed on the steel substrate, and a high-frequency remelting process is combined, so that the wear resistance, the bonding strength and the self-lubricating performance of the drill bit are synergistically improved, and the drill bit has the advantages of high strength and toughness matching and low cost.

The invention belongs to the technical field of textile assistants, and particularly relates to a polyester oiling agent for high-speed spinning, the polyester oiling agent comprises, by weight, 40-60 parts of a smoothing agent, 10-20 parts of an emulsifier, 5-20 parts of an antistatic agent, 5-10 parts of a bundling agent, and 5-15 parts of oil-containing lubricating particles, the oil-containing lubricating particles comprise a core suspension and a shell layer coating the outer side of the core suspension, and the shell layer is a polyester oiling agent. The core suspension comprises an oily dispersion medium and inorganic nano lubricating particles dispersed in the oily dispersion medium, and the shell layer is of a temperature-sensitive reversible cross-linked network structure. According to the polyester oiling agent for high-speed spinning, the anti-wear and anti-friction performance, the lubricating performance, the stability and the anti-agglomeration capacity of the oiling agent are improved by optimizing the adding mode of the nano particles.

The invention discloses a coaxial torque vector distribution system which comprises a differential mechanism and a vector motor, a motor shaft of the vector motor is hollowly sleeved on a left half shaft of the differential mechanism, and the motor shaft is in transmission connection with the left half shaft and the differential mechanism through a transmission assembly; the transmission assembly comprises a first planet row and a second planet row, the first planet row and the second planet row share the same planet carrier, a first gear ring of the first planet row is fixedly connected to the left half shaft, and a second gear ring of the second planet row is fixedly connected to the differential mechanism shell. The sun gear of the first planet row or the sun gear of the second planet row is fixedly arranged at the far end of the motor shaft. The differential mechanism has a torque distribution function, the double planet row systems share one planet carrier, and the rotating speed of the planet carrier is lower than that of the differential mechanism shell, so that the dragging torque is smaller, and the performance is higher; meanwhile, the gear ring is adopted for power output, the rotating speed of a transmission assembly of the whole system can be reduced, heat generation is greatly reduced, the problems of oil liquid oxidative deterioration, lubricating performance reduction, aging of rubber sealing pieces and the like are solved, and safety is improved to the maximum extent.

The present invention relates to the technical field of mechanical equipment, and specifically relates to a method and system for evaluating the lubrication reliability of industrial equipment, including the following steps: S1, collecting operation data: collecting the operation data of mechanical equipment; S2, evaluating lubrication performance: calculating the flow performance and lubrication performance of lubricating oil by using the Arrhenius model and the Barus model; S3, dynamic monitoring and adjustment of lubricating film thickness: implementing a technology for dynamically monitoring the lubricating film thickness, and real-time monitoring and adjusting the thickness of the lubricating film; S4, evaluating lubrication effect: evaluating the lubrication effect of lubricating oil under the current working conditions; S5, determining the reliability level: determining the reliability level of the lubricating oil; S6, proposing improvement measures: if the reliability of the mechanical equipment lubrication does not meet the preset standard, proposing improvement measures for the lubrication scheme. The present invention ensures that the mechanical equipment always maintains the best lubrication state under changing conditions, and reduces the risks caused by improper lubrication.

The invention relates to a diesel engine oil pan engine oil supply device and method, and relates to the technical field of diesel engines, the device comprises a filter element rotationally arranged in an oil pool body at one end of the bottom of an oil pan, a first driving mechanism is arranged above the filter element, and the first driving mechanism is used for driving the filter element to rotate through rotation of a crankshaft in an upper crankcase; purifying the engine oil through centrifugal separation; the device further comprises an oil supply pipe, one end of the oil supply pipe extends to the position below the filter element, the other end of the oil supply pipe extends to the crankshaft, and an oil supply pump used for conveying purified engine oil into the lubricating system is arranged on the oil supply pipe. The device further comprises a particle storage ring sleeving the upper part of the filter element. According to the oil supply device, the functions of lubricating additive particle storage, discharging, adding and the like are integrated in the oil pan and are tightly combined with the engine oil purification function, an efficient oil supply system is formed, the working efficiency and reliability of the whole lubricating system are improved, and the lubricating performance of engine oil can be greatly improved by adding the lubricating additive particles.

The invention discloses a wind-water combined heat dissipation method and device for a hydraulic station, and relates to the technical field of hydraulic heat dissipation control. The wind-water combined heat dissipation method comprises the steps that an expected die-casting plan of a target die-casting machine is read; an expected working load is determined, temperature rise trend prediction of oil liquid of the multiple hydraulic components is carried out, and multiple predicted oil temperatures are output; performing cooling demand analysis, and determining a plurality of initial cooling temperature values; carrying out lubrication performance attenuation analysis, compensating the plurality of initial cooling temperature values, and outputting a plurality of cooling temperatures; a wind-water combined heat dissipation twin model is constructed, heat dissipation parameter simulation optimization is carried out, and an optimized heat dissipation control strategy is output; and according to the optimized heat dissipation control strategy, heat dissipation control in the cooling backflow period is conducted on the target hydraulic station. The technical problems that in the prior art, heat dissipation accuracy and practicability are insufficient, and the working quality and working efficiency of the hydraulic station are affected are solved, and the technical effects that the heat dissipation accuracy and practicability of the hydraulic station are improved, and the working efficiency and working quality of the hydraulic station are improved are achieved.

The invention discloses a circulation system of aluminum wire drawing liquid, and relates to the technical field of metal processing, the circulation system comprises: a wire drawing device, which is provided with an immersion liquid box and an outlet die, and after entering the immersion liquid box for drawing, an aluminum rod is sized from the outlet die for molding; a filter is arranged in the wire drawing liquid pool, the filter is communicated with the immersion liquid box through a circulating pipe I, the circulating pipe I is connected with a heat exchanger, and the immersion liquid box is communicated with the wire drawing liquid pool through a return pipe; the cooling system is connected with the heat exchanger through a circulating pipe II; the filter is provided with at least one continuous filtering mechanism, and the continuous filtering mechanism is configured to trigger the continuous filtering mechanism to rotate to switch a new filtering structure when the water level in the filter rises. After the water-based aluminum wire drawing liquid is adopted, no smell is generated in the circulation process, and the surrounding environment of a machine table is clean and tidy. Meanwhile, after the aluminum powder is filtered and is drawn by a nano-mold, the lubricating property is good, and the surface of the aluminum wire is smooth and clean.

The present invention relates to the technical field of cutting fluids, and in particular to a water-based high-lubricity cutting fluid and a preparation method thereof, comprising triethanolamine, an oily corrosion inhibitor, a lubricating additive, benzotriazole, a surfactant, a potassium hydroxide solution, a pH regulator and deionized water. The water-based high-lubricity cutting fluid in the present invention is compounded by lubricating additives, triethanolamine, an oily corrosion inhibitor, benzotriazole, a surfactant and the like, wherein the sulfide fatty acid ester embedded in the lubricating additive is thrown out from the pores under the action of centrifugal force when subjected to a high centrifugal speed, and adheres to the metal surface to form a dense sulfide film, which plays a lubricating role, can effectively reduce shear stress, reduce friction and power consumption, reduce the temperature of the friction part between the tool and the workpiece and the tool wear, improve the cutting performance of the workpiece material, and improve the lubrication performance of the cutting fluid, so that it has the characteristics of small usage and high cutting quality.

The invention discloses a preparation method of graphene-coated aluminum oxide nanoparticles and a reinforced copper-based composite material thereof, and belongs to the field of metal-based composite materials, graphite flakes are stripped into graphene through a wet ball-milling one-step method, the graphene coats the surfaces of aluminum oxide particles, then the graphene is mixed with nano copper powder, and the mixture is formed through a powder metallurgy process; according to the method, the traditional multi-step process is simplified, and the composite material has high wear resistance and excellent functional characteristics by utilizing the lubricity and electric conductivity / thermal conductivity of graphene, and is suitable for the high-end fields of heat dissipation of electronic devices, sliding bearings and the like.

The invention relates to the technical field of friction pair testing, in particular to a method and system for testing the lubricating performance of an engine friction pair. The method comprises the following steps: simulating reciprocating motion of a friction pair of an engine in a lubricating state by using a friction part of a friction tester, and acquiring data points of the friction part at different moments; according to the moments corresponding to the data points, the friction force data and the temperature data, the multiple data points of the friction part are clustered to obtain multiple clusters, and noise degree values of the clustered data points are determined; determining an abnormal degree value of the target data point according to the noise degree value of the data point in the data space; and taking the reciprocal of the average value of the abnormal degree values of all the correction data points as the lubricating performance parameter value of the friction pair in the lubricating state. According to the technical scheme, a more accurate test result of the lubricating performance of the friction pair can be obtained.

The invention discloses a polymorphic graphite-carbide steel-based multiphase wear-resistant composite material and a preparation method and application thereof.The material is of a composite tissue structure of spheroidal graphite, three-dimensional coralline graphite, multiple carbides and a steel matrix, and the multiple carbides are M3C type carbides and MC type carbides. Comprising the core steps of component design, composite inoculant proportion design, smelting and inoculation treatment, subsequent heat treatment and the like, and is characterized in that synergistic precipitation of spheroidal graphite, three-dimensional coralline graphite and various and multi-size carbides is achieved through chemical component design and inoculation regulation and control; the invention further provides application of the material in high-impact, heavy-load or dry-friction working conditions of crushing or grinding equipment. The material provided by the invention has better comprehensive wear resistance under complex working conditions, has structural stability, impact resistance, lubricity and thermal stability, and has wide engineering application prospects in severe environments such as high impact, high load, dry friction and the like.

The invention provides a preparation method of a conductive toughened self-lubricating polyimide composite material, and relates to the field of hybrid multi-scale nano composite materials. The material is prepared from the following raw materials: polyimide, a surfactant, a lubricant, a conductive agent and a dispersing agent. The preparation method of the material comprises the following steps: stably dispersing graphite and carbon nanotubes in a liquid medium by utilizing the amphipathy of graphene oxide, uniformly mixing the graphite and the carbon nanotubes with polyimide slurry, freezing, soaking, self-assembling to form a three-dimensional continuous carbon nano network, and finally carrying out compression molding on a hot press. The conductive toughened polyimide composite material is prepared by the method which is simple, convenient, efficient, wide in applicability and convenient for industrial production, the impact resistance and the high-temperature self-lubricating performance of the conductive toughened polyimide composite material can be remarkably improved while static electricity is dissipated, and the application range of the polyimide composite material in the fields of aerospace, new energy automobiles, electronics, microelectronics and the like is widened.

The invention discloses a biomass-based ionic liquid modified carbon quantum dot and a preparation method thereof, and a composite lubricant, the preparation method of the biomass-based ionic liquid modified carbon quantum dot comprises the following steps: preparing a carbon quantum dot and choline amino acid ionic liquid from a biomass raw material, choline chloride and amino acid; the biomass composite lubricant is prepared from choline amino acid ionic liquid modified carbon quantum dots, biomass renewable resources are used for replacing traditional petrochemical resources, and the biomass composite lubricant is environmentally friendly and can be decomposed by nature, clean production is achieved, and environmental pollution is eliminated. The CQDs / ILs composite lubricant can play a role of nano balls, so that the bearing capacity of the CQDs / ILs composite lubricant is improved, abrasion is reduced, the choline amino acid ionic liquid has good solubility besides good lubricating performance, the dispersity of the carbon quantum dots can be improved by modifying the carbon quantum dots with the choline amino acid ionic liquid, and the stability of the CQDs / ILs composite lubricant is improved. The tribological performance is further improved.

The invention provides a double-electric-drive lubricating system, a double-electric-drive system and a double-electric-drive lubricating control method, and relates to the technical field of new energy automobiles. The system comprises a controller, an oil pan, a first lubricating branch, a second lubricating branch and an interconnection path, the first lubricating branch comprises a first oil pump and a first cooler which are sequentially connected through a first lubricating oil way. The second lubricating branch comprises a second oil pump and a second cooler which are sequentially connected through a second lubricating oil way. The interconnection passage is respectively connected with the first lubricating oil passage and the second lubricating oil passage, and the first end of the interconnection passage is arranged between the first cooler and the second end of the first lubricating oil passage; the second end of the interconnection path is arranged between the second cooler and the second end of the second lubricating oil path; the controller is connected with the first oil pump, the second oil pump and the adjustable valve. The purpose of supplying oil as required is achieved through the first lubricating branch, the second lubricating branch and the interconnection passage with the adjustable valve, and the lubricating performance is improved.

The utility model discloses a self-lubricating knuckle bearing which comprises an inner ring and an outer ring, the inner ring and the outer ring rotate and swing at any angle by taking a spherical surface as a contact surface, sealing rings are connected to two sides, close to the edge, of the outer ring, one end of each sealing ring is embedded in the inner side wall of the outer ring, and the opposite end of each sealing ring is an oblique cutting end part; the beveled end part is gradually narrowed from top to bottom until a sharp end surface is formed, and the beveled end part is inclined outwards; the sealing ring is located between the inner ring and the outer ring, and the inclined cutting-shaped end part abuts against the outer side wall of the inner ring, so that the sealing ring with the design is more reasonable in structure, can have better sealing performance even in a severe environment, and effectively prevents foreign pollutants from entering the space between the inner ring and the outer ring of the knuckle bearing, thereby ensuring the lubricating performance.

The invention discloses a novel three-screw pump with a driven screw independently limited, sealed and lubricated, belongs to the technical field of hydraulic delivery pumps, and aims to solve the problems that in an existing three-screw pump working structure, axial force generated by a driving screw and a driven screw is not matched uniformly, and actual use is limited. A convex extension shaft head is integrally manufactured at the rear tail end of a medium inlet low-pressure area of a left driven screw and a right driven screw which are meshed with two sides of a driving screw, a pressure bearing and a mechanical oil seal are mounted on the convex extension shaft head, and a bearing rear end cover is connected to an opening of a rear tailstock through a fixing screw. An inner concave cavity formed by connecting the bearing rear end cover with the rear tailstock, the pressure bearing and the mechanical oil seal alternately form an isolated and independent bearing sealing cavity, and the bearing sealing cavity is filled with lubricating grease for lubricating the pressure bearing. The hydraulic pump is practical in structure and suitable for hydraulic conveying of working media such as high-temperature asphalt with poor lubricating performance.

The present invention discloses a biomass-based ionic liquid-modified carbon quantum dots, a preparation method thereof, and a composite lubricant. The preparation method of the biomass-based ionic liquid-modified carbon quantum dots uses biomass raw materials, choline chloride, and amino acids to prepare carbon quantum dots and choline amino acid ionic liquid. The choline amino acid ionic liquid is used to modify the carbon quantum dots to produce a biomass composite lubricant. This uses renewable biomass resources instead of traditional petrochemical resources, is environmentally friendly, can be decomposed by nature, achieves clean production, and eliminates environmental pollution. The CQDs / ILs composite lubricant can function as "nanoballs," thereby improving its load-bearing capacity and reducing wear. In addition to having good lubricating properties, the choline amino acid ionic liquid also has good solubility. Modifying the carbon quantum dots with the choline amino acid ionic liquid not only improves the dispersibility of the carbon quantum dots but also further enhances their tribological properties.

The present invention relates to the field of oilfield chemical technology for oil and gas drilling engineering, and in particular to a silicate water-based drilling fluid for coalbed methane wells and its application. Calculated by mass, the raw materials of the silicate water-based drilling fluid for coalbed methane wells include: 100 parts of water, 1-3 parts of bentonite, 1-5 parts of pH regulator, 3-5 parts of silicate, 2-4 parts of silicate stabilizer, 0.1-0.15 parts of viscosity enhancer, 2-4 parts of fluid loss reducer, 3-5 parts of auxiliary inhibitor, 1-2 parts of activator, 2-4 parts of plugging agent and 2-4 parts of lubricant. The silicate water-based drilling fluid for coalbed methane wells of the present invention has good rheological properties, fluid loss properties, plugging properties and lubrication properties in a low temperature environment, and is more suitable for coalbed methane well drilling operations.

The invention relates to the technical field of bearing pedestals, in particular to wind generating set bearing pedestal supporting equipment which comprises a shell, a main shaft is connected to the inner side of the shell in a sleeved mode, and the wind generating set bearing pedestal supporting equipment is characterized in that a material storage box is arranged on the upper surface of the shell, a material injection opening is connected to the top of the material storage box in a penetrating mode, and an oil conveying pump is connected to the bottom of the material storage box in a penetrating mode; the bottom of the oil delivery pump is connected with an oil delivery pipeline in a penetrating mode, the lower surface of the shell is connected with an oil well pump in a penetrating mode, the bottom of the oil well pump is connected with a storage cavity in a penetrating mode, the bottom of the storage cavity is symmetrically connected with ball valves in a penetrating mode, and the upper surface of the bottom of the shell is fixedly connected with a storage cavity. Old grease can be discharged through pressure, the residual old grease in the shell is completely removed, the situation that the lubricating performance is reduced due to the fact that the new grease and the old grease are mixed is avoided, the new grease can more evenly cover the surface of the bearing, an effective lubricating film is formed, and friction and abrasion are reduced.

The invention discloses a lubricating material for processing an oxidation-resistant PET (Polyethylene Terephthalate) product and a preparation method of the lubricating material, and relates to the technical field of preparation of PET lubricating materials. The lubricating material consists of 60-85 parts of a main lubricant, 5-20 parts of an auxiliary lubricant, 0.5-3 parts of an antioxidant and 2-10 parts of a dispersing agent. During preparation, powder with D50 smaller than or equal to 30 microns is prepared through a staged mixing process, a twin-screw extrusion melt blending process and a 10-20 DEG C / min rapid cooling process. 0.1%-1.5% of the material is added during PET processing, the light transmittance of a product reaches 90.8% or above, the haze is smaller than or equal to 1.4%, the oxidation induction period is prolonged to 30 minutes or above, meanwhile, the friction coefficient is reduced to 0.27 or below, and the material has excellent mechanical strength by utilizing the high bond energy characteristic of a C-D bond of the deuterated antioxidant and cooperating with a nano dispersion system. Through molecular structure design and process innovation, the technical problem that the light transmittance, oxidation resistance and processing lubricity of a traditional PET material are difficult to synergistically improve is solved.

The invention discloses a lubricating performance degradation modeling method for a sliding bearing of a gear pump of an aero-engine. The method comprises the steps of 1, obtaining model parameters through training data, and further constructing a Markov chain degradation model; 2, combining real-time measurement data, based on a degradation model, constructing a bearing clearance degradation model more fitting the actual condition, and outputting the abrasion loss of degradation at each moment; step 3; the method comprises the following steps: solving a Reynolds equation to obtain oil film pressure distribution on the basis of an over-relaxation iteration mathematical method, solving bearing lubrication characteristic parameters through the pressure distribution, and establishing a sliding bearing lubrication characteristic parameter calculation program; and 4, sequentially substituting the abrasion loss at each degradation moment into a lubricating characteristic parameter calculation program to obtain a process of deepening the change of the lubricating characteristic parameter of the bearing along with the abrasion degradation so as to finish the lubricating performance degradation modeling of the sliding bearing of the gear pump of the aero-engine. The method has the advantage of higher fitting degree with the specific object working condition and the actual degradation condition.

The utility model discloses a compressor and refrigeration equipment, and relates to the technical field of compressors, the compressor comprises a motor assembly, a crankshaft and a bearing assembly; the crankshaft is connected with the motor assembly and provided with a center oil hole, the connecting section of the crankshaft is provided with an oil outlet, one end of the oil outlet is communicated with the center oil hole, and the other end of the oil outlet penetrates through the outer surface of the connecting section. The bearing assembly is provided with a shaft hole and rotationally connected to the connecting section through the shaft hole, and an anti-attrition layer is arranged on the inner wall of the shaft hole. By arranging the anti-friction layer, the friction force between the crankshaft and the shaft hole can be reduced, the lubricity between the crankshaft and the shaft hole is improved, and the abrasion of the crankshaft and the bearing assembly is reduced. In addition, by arranging the oil outlet hole, lubricating oil can flow between the outer surface of the connecting section and the hole wall of the shaft hole through the center oil hole and the oil outlet hole, the purpose of oil lubrication is achieved, the crankshaft and the bearing assembly are kept in a good lubrication state all the time, and abrasion of the crankshaft and the bearing assembly can be further reduced.

The utility model discloses a guide vane sleeve combination bearing applied to a tubular turbine, which comprises a bearing seat, and a shaft sleeve groove penetrates through the middle of the bearing seat. According to the utility model, the bearing seat cast by stainless steel avoids the influence of welding stress, the sealing performance, the oxidation resistance and the corrosion resistance of the bearing seat are greatly improved, the service life of the bearing seat is greatly prolonged, and the shaft sleeve made of the high-strength modified polycaprolactam and molybdenum disulfide homogeneous high polymer material has good self-lubricating performance; the novel combined bearing has the advantages of no need of additional lubricant, close dynamic friction coefficient and static friction coefficient, no creeping phenomenon during working, low water absorption rate, excellent dimensional stability, no abrasion to a rotating shaft and no chemical corrosion problem, and compared with the original combined bearing assembly, the novel combined bearing is more reliable and simple in structural design, easy to maintain, low in water absorption rate, more stable in size, good in rigidity and high in reliability. The problems of welding deformation and corrosion of an existing guide vane sleeve and water absorption expansion and delamination of a combined bearing are solved.

The invention discloses a super-lubricating and corrosion-resistant DLC (diamond-like carbon) protective coating and a preparation method thereof, and belongs to the technical field of protective coatings. The coating is prepared on a base body through magnetron sputtering and magnetic filtering arc ion plating processes, a multi-layer composite structure is formed by doping transition metal elements and non-metal elements, and the multi-layer composite structure comprises a cleaning modification layer, a gradient transition layer, a combination strengthening layer, a main functional layer and a surface lubricating layer. Through element doping, the internal stress of the DLC coating is effectively reduced, the surface lubricity is enhanced, the bonding strength of the coating and a matrix is improved, and meanwhile the high hardness and excellent wear resistance of the DLC coating are reserved. In addition, the preparation process is simple, is suitable for industrial production, and can be widely applied to surface protection in the fields of molds, automobiles, aerospace and the like.