18 results about "Particle erosion" patented technology

The invention discloses a particle erosion test device and method, and belongs to the technical field of particle erosion tests.The particle erosion test device comprises a clamping piece used for clamping a workpiece, a sand blasting device and a laser emitter, and the laser emitter is used for emitting laser to irradiate the workpiece so as to heat the workpiece; the particle erosion test device further comprises cooling water pipes and a vacuum pipe, the vacuum pipe is arranged outside the laser transmitter in a sleeving mode, the two opposite ends of the vacuum pipe are connected with the cooling water pipes, and the cooling water pipes are communicated with the cooling water tank. The cooling water pipe is used for introducing circulating cooling water into the vacuum pipe so as to adjust the temperature of the laser transmitter, and the air compressor sprays compressed air to the workpiece through the compressed air spraying pipe so as to cool the workpiece. Through combined use of the laser heating device and the particle erosion device, a particle erosion test in an extreme environment is stably simulated, and the effectiveness of the test is ensured.

The invention relates to an aircraft outer surface coating high temperature and wear resistance detection device, and relates to the technical field of detection devices.The aircraft outer surface coating high temperature and wear resistance detection device comprises a detection table, the interior of the detection table is divided into a high temperature simulation detection cabin and a wear simulation detection cabin through a partition plate, and a detection piece and a leak hole supporting table are arranged in the high temperature simulation detection cabin; the device further comprises a moving mechanism, a rotary friction piece and a cooling assembly, the moving mechanism is used for driving the leak hole supporting table to achieve stretching, retracting, deflection and transverse displacement, the rotary friction piece can stretch and retract and rub the to-be-detected sample piece in a line contact or surface contact mode, and the cooling assembly comprises a cooling mechanism and a stretching and retracting mechanism. The rotary friction piece has a linear contact friction mode and a surface contact friction mode, telescopic adjustment can be achieved through a fourth telescopic rod, rotation can be controlled through a first motor, dynamic conversion of contact forms of movable parts of an airplane in movement can be simulated, and abrasion detection of friction abrasion and particle erosion is achieved in cooperation with erosion simulation of a particle acceleration device.

The utility model relates to the technical field of testing of equipment erosion caused by annulus particles, and discloses an underground annulus particle erosion experiment device which comprises an annulus simulation bin, an experiment cavity is formed in the annulus simulation bin, experiment equipment is arranged in the experiment cavity, and a particle erosion arc groove is formed in the inner wall of the experiment cavity; the testing mechanisms are located at the upper end and the lower end of the annulus simulation bin, each testing mechanism comprises a bearing assembly, a pressing assembly and a rotating assembly, the bearing assemblies are located at the bottom of the annulus simulation bin, the pressing assemblies are located at the top of the annulus simulation bin, and the rotating assemblies are located in the pressing assemblies; through the arrangement of the testing mechanism, an underground annular particle erosion experiment can be simulated, the erosion effect of particles on equipment under different working conditions can be simulated through the erosion experiment, the erosion resistance and the service life of the equipment can be evaluated, a scientific basis is provided for design, material selection and maintenance of the equipment, and it is ensured that the equipment can safely and reliably operate underground.

This utility model relates to a fiber-reinforced composite polypropylene pipe. It solves the technical problems of insufficient stability in existing interlayer connections and easy wear and tear on the outer surface of the composite pipe due to particle erosion. It includes a hollow pipe body with an inner layer on its inner side, a middle layer on its outer side, and an outer layer away from the inner layer. A fixing structure is provided between the inner and middle layers, and between the middle and outer layers. The inner layer has several internally protruding ribs on its circumferentially inner side, and the outer layer has a wear-resistant surface on its circumferentially outer side, with wear-resistant parts on the wear-resistant surface. The advantages are: the fixing structure makes the pipe body structurally stable, enhancing the overall structural stability and mechanical strength of the pipe, and improving its resistance to deformation; the internally protruding ribs reduce resistance during fluid transport; and the wear-resistant parts on the outer surface of the pipe body resist friction and scratches from external objects, thereby effectively extending the service life of the pipe.

The application provides a calculation method for pipeline erosion process simulation based on large eddy simulation, which comprises the following steps: S1, meshing a geometric piece by using ICEM software; S2, setting boundary conditions and particle parameters; S3, setting a fluid calculation format; S4, setting a particle erosion model; S5, calculating by using OpenFOAM software and post-processing by using Paraview software. The application adopts large eddy simulation, and simultaneously considers the calculation cost and accuracy, especially for a bent pipe, and can better capture the secondary flow phenomenon. Moreover, the calculation method can obtain the erosion condition in advance by using the simulation method, and the actual process can be adjusted accordingly, so that the experimental cost is greatly saved.

The invention relates to an on-line measuring device and a measuring method for sample abrasion loss under a single variable condition, an impact particle swarm generation unit generates particle swarms with different impact speeds, and a measuring box is used for placing a sample and is provided with a temperature adjusting unit, a gas guide unit and a measuring unit for on-line measurement of sample quality. And the controller controls and cooperates to complete the abrasion loss test of the high-temperature oxidation sample under the variable temperature condition and the corrosion atmosphere. According to the method, the erosion rate data is calculated more accurately by monitoring the sample quality in real time, the prediction logic of the damage period caused by erosion is obtained by mastering the relationship between particle erosion and steel sheet quality change under different working conditions, and a theoretical basis is provided for equipment maintenance; the erosion weight loss of the steel sheet sample under the conditions of different particle components, impact angles and medium flow rates at high temperature can be tested, and repeated erosion experiments are performed on a single sample by testing the mass of the erosion steel sheet in real time, so that the change rule of the surface damage degree and the weight loss of the sample along with time under different working conditions is obtained.

The invention discloses a pressure-measurable arc heater high-pressure erosion test particle broadcast mixing chamber, which comprises: a mixing cavity, which is of a cylindrical tubular structure, and two end surfaces of which are provided with a plurality of through holes for circulation of a cooling liquid; the flange is connected to the mixing cavity and is used for realizing connection and sealing between the particle broadcasting and mixing chamber and other equipment and cooling the mixing cavity; the at least one filler neck is arranged on the side wall of the mixing cavity and is used for broadcasting particles into the mixing cavity; and the at least one pressure measuring filler neck is arranged in the mixing cavity and is used for measuring the pressure in the mixing cavity. According to the invention, stable operation of the particle erosion test under the conditions of high power and high arc chamber pressure can be realized, the pressure measuring function is realized, and the installation of test equipment is simplified.

The application discloses a kind of particle erosion test device and test method, belong to particle erosion test technical field, including for clamping workpiece clamping piece, sand blasting device and laser emitter, laser emitter is used to emit laser to irradiate workpiece to heat workpiece, sand blasting device is used to spray particle to workpiece to erode workpiece, particle erosion test device further includes cooling water pipe and vacuum pipe: vacuum pipe is sleeved in laser emitter outside, opposite ends of vacuum pipe are connected with cooling water pipe, cooling water pipe is communicated with cooling water tank, cooling water pipe is used to circulate cooling water into vacuum pipe to adjust the temperature of laser emitter, air compressor is sprayed compressed air to workpiece by compressed air spray pipe to cool workpiece.The application is realized by the combination use of laser heating device and particle erosion device, realizes stable simulation particle erosion test in extreme environment, guarantees the effectiveness of test.

The present application relates to the technical field of thermal protection material performance evaluation, and particularly relates to a particle scouring dynamic load calculation method based on a discrete element material model, which comprises the following steps: obtaining mechanical parameters of a thermal protection material; obtaining particle flow parameters; obtaining local surface geometric information of the thermal protection material impacted by the particles; obtaining a local surface unit normal vector and a radius of curvature; constructing a corresponding particle-surface interaction physical model; and obtaining particle scouring dynamic load based on the particle-surface interaction physical model according to the mechanical parameters of the thermal protection material, the particle flow parameters, the radius of curvature and the particle impact normal velocity. The present application calculates the dynamic load of the particle flow applied to the material surface grid on the basis of taking into account the calculation efficiency and model accuracy, and provides a new idea for the anti-particle erosion performance evaluation of engine components such as gas rudders and throat liners.

The application discloses a kind of water turbine blade fatigue damage numerical simulation and life prediction method and related device, comprising: obtaining the three-dimensional geometric model of water turbine blade and operating condition parameter;According to the three-dimensional geometric model of the water turbine blade and operating condition parameter, fluid-structure interaction model is established, and the fluid pressure fluctuation, cavitation impact stress and sand particle erosion load distribution on the surface of blade in the operation process are extracted;According to the fluid pressure fluctuation, cavitation impact stress and sand particle erosion load distribution on the surface of blade, the equivalent stress of blade is formed;Based on the equivalent stress and cycle number, fatigue damage evolution model is constructed;According to the fatigue damage evolution model and cumulative damage theory, the fatigue damage amount of blade under different operating time is calculated, and the life prediction result is output, and the method and related device can dynamically predict the fatigue life of water turbine blade.

The present application relates to a kind of high pressure coal slurry conveying valve spool surface strengthening high-entropy alloy composite powder and its laser cladding method.The component of the composite powder is as follows in percentage by mass: rare earth oxide powder 0~3 wt.%, Nb powder 28.33~29.18 wt.%, the balance is CoCrFeNi pre-alloy powder.The present application uses the regulating effect of rare earth oxide in the process of laser cladding rapid solidification to change the Laves phase in CoCrFeNiNb high-entropy alloy cladding layer from coarse continuous network distribution to fine dispersed distribution by the above-mentioned powder ratio and laser cladding process, which eliminates the hidden danger of brittle peeling of coating under the condition of high-speed coal slurry particle erosion.The surface hardness of cladding layer is not less than 670 HV 0.5 , the friction coefficient is not more than 0.60, and the corrosion current density is as low as 30.36 μA·cm ‑2 , which can meet the use requirements of high pressure coal slurry conveying valve spool under the coupling condition of coal chemical plant high pressure coal slurry erosion, abrasive wear and corrosion.

The invention belongs to the technical field of water and sand erosion research, and discloses a supercritical liquid driven high-temperature and high-pressure particle swarm assessment experiment system, which comprises a high-temperature and high-pressure particle swarm simulation module, a PIV particle image velocity measurement module, a test piece, a high-speed photographing module, a strain measurement module and a temperature measurement module, and the outlet of the high-temperature and high-pressure particle swarm simulation module is connected with the high-temperature and high-pressure nozzle, and the high-temperature and high-pressure nozzle is used for spraying out the high-temperature and high-pressure particle swarm. Evaluating the vaporization degree of the supercritical liquid, shooting a high-speed image of the high-speed particle erosion material, and measuring the temperature and deformation of the test piece during erosion; the device can be used for evaluating the driving effect of supercritical liquid on high-temperature and high-pressure particle swarms, researching the erosion mechanism of the high-temperature and high-pressure particle swarms, and researching the erosion resistance of test pieces and the thermodynamic effect after erosion.

The present application relates to the technical field of inorganic glass polishing powder preparation, in particular to a long-acting anti-abrasion glass polishing powder and a preparation method thereof. The present application overcomes the problems of traditional cerium-based polishing powder, such as easy settlement and pipeline blockage during processing, and lack of long-acting anti-abrasion protection after polishing. By in-situ combination and addition of sodium lignosulfonate and double-end epoxy polyethylene glycol in the precursor liquid, cross-linking reaction is carried out, and particle settlement is inhibited by steric hindrance and electrostatic repulsion. In addition, calcium metaborate or barium metaborate is added as a boron-containing fluxing component during pyrolysis and multiphase eutectic calcination, which locks the lamellar wear-reducing component in the inorganic skeleton, and integrates the cutting phase and the lubricating phase. Finally, the continuity of the processing flow is improved, and under the shear force, the glass surface migrates to form a film to play a dynamic lubrication role, effectively reducing the scratch width and inhibiting the rise of haze after long-term sand particle erosion.

The invention discloses a particle washout composite rotary printing electrolytic machining device and method, and relates to the technical field of electrolytic machining, the particle washout composite rotary printing electrolytic machining device comprises an anode assembly, a cathode assembly and a particle washout assembly, the anode assembly drives the to-be-machined rotary component to keep a certain gap with a cathode tool in the cathode assembly and rotate reversely at the same speed, electrolyte is sprayed out from the interior of the cathode tool and is sprayed towards the to-be-machined rotary component, and meanwhile, the erosion assembly sprays solid particles towards the rotary component; a passivation film generated by a metal material easy to passivate due to electrolysis is removed in time; while rotary printing electrolytic machining is carried out on the rotary component, the erosion solid particles are synchronously coupled, the impact strengthening effect on the material surface is facilitated, meanwhile, the machining precision, the machining efficiency and the surface strength are improved, and therefore the high-quality and uniform smooth surface of rotary printing electrolytic machining easy-passivation metal is obtained.

A simulation device for testing thermal barrier coatings in combustion chambers subjected to both swirling and particle erosion includes a swirling and particle erosion flame spray gun. An electronic igniter is installed inside the spray gun to apply different environmental loads to the sample. A sliding mechanism at the bottom allows the spray gun to slide back and forth relative to the thermal barrier coating sample. An adjustable emissivity infrared detector monitors the sample surface temperature. An air compressor provides compressed air to the spray gun, and a mass flow controller regulates the compressed air flow rate. Part of the air is supplied to an air-cooled nozzle to cool the sample. An aviation kerosene storage device supplies aviation kerosene to the spray gun. A PLC controller controls the aviation kerosene and air flow rates, receives real-time temperature monitoring from the infrared detector to control the relative distance between the spray gun and the sample, and controls the electronic igniter for ignition. This invention provides a test platform for effectively evaluating the failure behavior of thermal barrier coatings in combustion chambers under the synergistic damage effects of swirling flames and erosion / corrosion particles at different fuel-to-air ratios.

The invention discloses a corrosion-resistant and wear-resistant suspender and a heat treatment method thereof, and belongs to the field of boiler parts and metal heat treatment. In order to solve the problems that an existing suspender is insufficient in molten salt corrosion resistance and particle washing resistance, uneven in large section performance and short in service life, low alloy components with specific weight percentage are designed, the low alloy components comprise 0.18-0.28% of C, 3.00-5.00% of Cr, 0.80-2.00% of Ni, 0.15-0.35% of V, 0.0010-0.0035% of B and the like, normalizing, austenitizing at the temperature of 870-910 DEG C, salt bath isothermal quenching at the temperature of 360-410 DEG C and tempering at the temperature of 500-560 DEG C are adopted, and a complex-phase structure with lower bainite as the main part is obtained. The hanger rod is remarkably improved in corrosion resistance and wear resistance, uniform in large-section performance, capable of prolonging the service life to 8-12 years, less than or equal to 20% in cost increase, compatible with an existing production line, suitable for hanging a boiler heating surface tube bundle, and outstanding in economic benefit and environmental protection benefit.

The invention discloses a single-particle erosive wear online monitoring device based on a three-dimensional holographic technology, relates to the field of particle erosion, and is used for measuring the relationship between single-particle erosion and impact crater morphology, depth and erosive wear rate under different working conditions. According to the technical scheme, the device comprises a metal sample heating and oxidizing device used for heating a metal sample and setting the heating temperature and time; the impact particle impact speed measuring system comprises a single particle emitter used for emitting single particles and a single particle erosion impact speed measuring assembly used for measuring and recording the single particle erosion impact speed; and the surface topography measuring system is used for measuring the surface topography of the metal sample subjected to erosion-oxidation in situ by adopting interferometry.

The invention relates to the technical field of erosive wear experimental devices, and discloses a novel pneumatic multi-particle continuous ejection experimental system, which comprises an experimental base station, a replacement mechanism is arranged on the experimental base station, the replacement mechanism is used for replacing the position of a particle carrier clamping device, a feeding mechanism is arranged on the experimental base station, and the feeding mechanism is used for feeding the particle carrier clamping device into the experimental base station. The novel pneumatic type multi-particle continuous ejection experiment system can solve the problems that incidence parameters in the particle erosion process are uncontrollable, repeated erosion characteristic research of multiple particles under the same or different incidence conditions cannot be carried out and the like, research variables are controllable, and the particles can complete impact on a target body according to the preset incidence conditions; according to the method, researchers are helped to reveal the corresponding relation between the movement rebound behavior of the particles and the material surface damage mechanism under different incidence conditions and the accumulated damage stripping mechanism of the material in the repeated erosion process, and then primary and secondary factors influencing material removal are determined, so that the researchers can conveniently put forward better improvement measures.