40 results about "Particle erosion" patented technology

Erosion resistant coating compositions comprising a poly(Bisphenol A-co-epichlorohydrin) glycidyl end-capped component, an active hydrogen compound, a linear siloxane and a silsesquioxane. Protective coatings formed from such a composition impart particle-erosion resistance to parts having such a coating disposed on some portion of their surface.

The invention belongs to the technical field of wear-resistant coating materials, and in particular relates to a cobalt-based spraying powder for aero-engine wear-resistant parts, and also relates to a method for preparing the above-mentioned spraying powder. The composition and weight percentage of the spray powder are: chromium: 20%~30%; nickel: 7%~15%; tungsten: 5%~12%; carbon: 0.1%~1%; cobalt: 45%~65% %; the particle size range of the above spray powder is 5 μm to 45 μm; the coating obtained by using the spray powder is suitable for working at high temperature, and has excellent anti-abrasive wear, hard surface wear, fretting wear and particle erosion wear performance ;After spraying, the bonding strength is high, and it is not easy to fall off; after spraying, the coating has a uniform texture, smooth surface, no delamination and cracks; at the same time, the cobalt content in the material determines that the coating is an excellent anti-oxidation coating; in addition , the powder coating also has good coating grinding and polishing properties and high coating hardness, and can be widely used in the application of engine parts.

The invention discloses an experimental device for studying two-dimensional and three-dimensional seepage and soil particle erosion law, including a steel support, a test box arranged on the steel support, a sand screen arranged inside the test box and an intelligent water tap for adding water to the test box; the sand screen is arranged inside the test box along horizontal direction and divides the test box into an upper water inlet area and a lower sample area; the bottom of the test box is provided with a water outlet; a plurality of water pressure sensors are arranged on side walls corresponding to sample area of the test box and each water pressure sensor is connected with a computer terminal in communication junction. The experimental device and a test method for studying two-dimensional and three-dimensional seepage and soil particle erosion law can relatively and accurately reflect the erosion process and law of soil under seepage function.

The invention provides a corrosion/erosion-resistant coating for a waste incineration boiler heating surface. The coating has excellent corrosion resistance on molten salt hot corrosion and solid micro-particle erosion and is excellent in protective performance. According to the core protection layer of the coating, a titanium carbide-nickel-chromium alloy serves as a protection material, construction is performed by adopting a high velocity oxy-fuel mode, the nickel-chromium alloy layer is combined for bottoming, excellent protective performance is guaranteed, and the coating has excellent thermal shock resistance and adhesive force.

The invention discloses a self-crosslinking silicon-boron-containing high polymer matrix ablation-resistant heat insulation material and a preparation method, and belongs to the field of high polymercomposite materials. The material comprises, by weight, 100 parts of heat-vulcanized silicone rubber, 10-30 parts of polyborosiloxane prepolymers, 10-30 parts of white carbon black, 5-10 parts of fibers, 10-20 parts of light ablation-resistant fillers, 3-5 parts of vulcanizing agents and 1-3 parts of hydroxyl silicone oil. The method includes the steps: mixing the polyborosiloxane prepolymers andthe light ablation-resistant fillers; sequentially adding all materials to a mixer and performing plasticating; vulcanizing mixed rubber materials for three times to obtain the self-crosslinking silicon-boron-containing high polymer matrix ablation-resistant heat insulation material. The material serves under the condition of oxygen enrichment and high temperature, is subjected to carbonizing andceramic reaction in a high-temperature environment, serves as a high-temperature ablation-resistant protective layer and directly bears combined action of thermochemical ablation, gas denudation and particle erosion, and the ablation-resistant heat insulation performance of the material is effectively improved.

The invention discloses a bismaleimide resin/silicone rubber ablation-resistant thermal insulation composite material and a preparation method thereof. The composite material is prepared from the following components in parts by mass: 20-80 parts of methylvinylsilicone rubber, 20-80 parts of methyl vinyl phenyl polysiloxane rubber, 1-5 parts of dicumyl peroxide, 15-40 parts of white carbon black, 5-15 parts of chopped fibers, 5-40 parts of bismaleimide, 1-5 parts of hydroxyl silicone oil and 1-20 parts of zirconium boride. The bismaleimide resin/silicone rubber ablation-resistant thermal insulation composite material has high vulcanization molding quality, and a dense hard carbon layer can be formed on the surface of an ablation layer of the thermal insulation composite material in the ablation process to play a role of preventing the thermal insulation composite material from further ablation, thereby improving the ablation resistance and antioxygenic property of the thermal insulation composite material, enabling the thermal insulation composite material to meet the requirements of operating environments with oxygen enrichment, high temperature, high-speed gas flow and particle erosion, and solving the problem that the thermal insulation material is easy to flaw and be burnt out under the working environments with high temperature, high pressure, oxygen enrichment and particle erosion.

The invention discloses a method for optimizing particle erosion resistance of a turbomachinery blade runner structure. The method comprises the following steps: 1) acquiring field data during turbomachinery operation; 2) simulating a blade material accelerated erosion test in an actual service environment of the turbomachinery based on the field data of the turbomachinery during operation, and establishing a turbomachinery material erosion rate model and a particle rebound model; 3) establishing a turbomachinery flow channel gas-solid two-phase flow numerical simulation and erosion predictionmethod; and (4) building an anti-erosion optimization platform of the turbine machinery blade grid flow channel structure, achieving automatic optimization of particle erosion resistance of the bladeflow channel structure. According to the method, automatic optimization of particle erosion resistance of the blade flow channel structure can be achieved, and meanwhile accurate prediction of particle movement and erosion distribution in the turbine machinery blade grid flow channel can be achieved.

According to the emdoiment, A method for acquiring a material removal model in ultra-high pressure water jet machine includes solving a kinetic equation of a single abrasive particle erosion motion toobtain a motion trajectory equation of that single abrasive particle; Integrating the motion trajectory equation to obtain a first expression of the material removal amount of a single abrasive particle in the cutting time; Obtaining a cutting stop condition of a single abrasive particle, and solving a first expression according to the cutting stop condition to obtain a second expression of a material removal amount of the single abrasive particle; According to the flow rate of abrasive particles and the second expression, the third expression of material removal rate in ultra-high pressure water jet machining is obtained. The third expression is the material removal model in ultra-high pressure water jet machining. Considering the mechanism of material removal, the model can predict themachining process more accurately, and can guide the optimization of high efficiency and precision machining process in practical machining, which has theoretical guidance and engineering applicationsignificance.

Polyurethane-based coatings which exhibit superior erosion and heat resistance combined with antifouling and chemical resistance that are useful for protection of metal components are provided. The coatings are characterized by enhanced particle erosion resistance and enhanced heat resistance and are derived from specific multicomponent slurry compositions.

The invention discloses a dustproof film for the surface of an optical device lens, and the dustproof film comprises a micro-texture layer which is disposed on the surface of the optical device lens through a chemical etching method, a particle erosion method or a laser etching method. The micro-texture layer is composed of a plurality of micro-texture units which are arranged on the surface of the lens of the optical device at intervals in a regular arrangement mode or a crossed and staggered arrangement mode. The micro-texture layer is coated with an anti-reflection wear-resistant layer or a composite coating through a vacuum coating method, a chemical vapor deposition method or a sol-gel method. According to the dustproof film, the light transmittance can be guaranteed while the function of preventing dust deposition is achieved, collision damage of microparticles to a certain degree is resisted, the durability is high, and the service life is long.

The invention discloses a soil body internal erosion deformation response simulation method which comprises the following steps of: S1, collecting a soil body sample, constructing a numerical simulation sample model, and pressurizing and solidifying the numerical simulation sample model according to the actual stress state of a soil body; S2, calculating a stress reduction coefficient of each fine particle in the numerical simulation sample model; S3, generating a stress reduction coefficient statistical distribution diagram of the fine particles in the numerical simulation sample model; S4, calculating a stress reduction coefficient critical value of erosion of the fine particles in the soil body sample, and determining the total erosion amount of the fine particles; S5, determining an erosion deformation sample model; S6, determining strength characteristics and deformation characteristics of the erosion deformation sample model; and S7, taking the erosion total amount of the fine particles, the strength characteristics and the deformation characteristics as results of soil internal erosion deformation response simulation. According to the method, the erodible particles are judged based on the stress state of the particles and a hydraulic gradient to be applied, and the actual erosion condition is met.

The invention discloses an experimental system for testing a particle concentration and surface damage association rule. The experimental system comprises a particle flow mixing section, an erosion testing section and a particle collecting section, the particle flow mixing section is used for ensuring uniform distribution of particles in the loop, the erosion testing section is used for carrying out a particle erosion test, and the particle collecting section is used for temporarily collecting particles in the loop of the whole experimental device. The test elbow in the experiment system can be detached, so that the weight loss measurement of the eroded sample is realized. Besides, the particle collecting device can temporarily store the particles, so that after the test elbow is weighed, the test elbow can be arranged back to the erosion loop, and the next round of erosion experiment can be carried out on the basis of the existing particle accumulation. According to the experimental system provided by the invention, the correlation rule of the particle concentration and the surface damage under the time dimension can be obtained, and an important reference basis is provided for predicting the erosion of the particles in the pipe.

The invention discloses a single particle-target plate erosion morphology prediction method based on an energy conversion mechanism, and belongs to the field of numerical simulation prediction. The simulation prediction method comprises the following steps: establishing normal, tangential and rolling contact stiffness expressions between a single particle and a target plate in a contact force calculation link in an erosion process; simulating and measuring normal and tangential collision energy between a single particle and a target plate in an erosion process by using a discrete element method; according to the normal collision energy and the tangential collision energy absorbed by the target plate, the normal erosive wear volume lost due to normal low-cycle fatigue damage of the target plate and the tangential erosive wear volume lost due to the ploughing-fracture effect in the single-particle erosion process are calculated respectively; and based on the normal and tangential wear volumes of the target plate in the single particle erosion process, predicting the single particle-target plate surface erosion wear geometric morphology by adopting a geometric superposition method. According to the method, the erosive wear morphology of the surface of the single particle-plastic metal target plate at different incident angles can be effectively predicted.