22 results about "Wear debris" patented technology

The invention relates to the technical field of equipment lubricating oil monitoring, in particular to a wear debris electrostatic monitoring method and system based on combination of characteristic mode decomposition and time-frequency images, and an electrostatic sensor monitoring system comprises a sensor shell, an annular copper probe, a polyether-ether-ketone pipeline, a shielding cover, a signal processing circuit and other modules. An insulating pipe in the sensor is a polyether-ether-ketone pipeline, lubricating oil passes through the inside of the polyether-ether-ketone pipeline, and a red copper probe of the sensor is attached to the outer surface of the polyether-ether-ketone pipeline. The method comprises the following steps of: firstly, constructing a signal enhancement model based on characteristic modal decomposition and a kurtosis measurement criterion, and screening out a key modal component with high sparsity for reconstruction by calculating a Gini coefficient of each modal component; further enhancing the signal pulse of the wear debris through modal component optimization reconstruction and a sparse representation model; and finally, identifying the wear debris impact signal based on the continuous wavelet transform time-frequency image to realize real-time monitoring of the wear debris.

An object of the present invention is to provide an abrasion powder collection method and an abrasion powder collection device capable of collecting abrasion powder while preventing aggregation of the abrasion powder.SOLUTION: A method for collecting abrasion powder of the present invention includes a collecting step of sucking and collecting abrasion powder obtained by pressing a rubber piece against an abrasion drum and rotationally abrading the rubber piece by a suction device, wherein in the collecting step, powder for preventing aggregation is supplied to a rotational abrasion surface between the abrasion drum and the rubber piece, and a supply flow amount of the powder for preventing aggregation is 0.5 to 6.0 (cm3 / min). A device for collecting abrasion powder of the present invention includes an abrasion drum configured to be capable of pressing a rubber piece, a suction machine for sucking abrasion powder, and a supply unit for supplying powder for preventing aggregation to a rotational friction surface between the abrasion drum and the rubber piece, in which the suction machine includes a suction nozzle, and the suction nozzle is disposed immediately below the rotational friction surface of the abrasion drum with the rubber piece.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of nuclear energy materials and surface engineering, and particularly relates to application of an MAX phase coating in a lead bismuth environment. The MAX phase coating is deposited on the surface of the structural material, so that the corrosion resistance and wear resistance of the steam generator can be remarkably improved. The result shows that under the conditions that the temperature is 450 DEG C, the normal load is 50N, the displacement amplitude is 75 microns, the vibration frequency is 25Hz and the cycle index is 106, a stable aluminum oxide oxidation layer and a compacted abrasive dust layer can be formed, so that the Ni element is effectively prevented from being dissolved, and the corrosion rate of a structural material is reduced; meanwhile, the abrasion depth of the structural material is reduced by 70% compared with that before protection, the structure is stable, the binding force is high, and the structural material is still kept complete and has no obvious peeling or failure phenomenon even in a long-cycle test.

The application relates to the technical field of friction and wear testing machines, in particular to a multi-mode self-positioning friction and wear equipment, which comprises a main rotating shaft, the bottom end of the main rotating shaft is connected with an upper clamp, the upper clamp is in a cylindrical structure, the upper clamp is coaxially connected with the main rotating shaft, the bottom of the upper clamp can be installed with a plurality of upper friction pairs, the plurality of upper friction pairs are circumferentially distributed around the main rotating shaft; the upper clamp is detachably connected with brushes between adjacent upper friction pairs, and all the brushes are circumferentially distributed around the main rotating shaft; a lower clamp is arranged below the upper clamp and is horizontally slidably connected to a base, and the top of the lower clamp can clamp a lower friction pair. The application can improve the stability of the upper friction pairs under the conditions of large load and high rotating speed, and improve the accuracy of the test results by arranging a plurality of upper friction pairs; the brushes can sweep away the wear debris, reduce the friction between the upper friction pairs and the wear debris, and make the test results more accurate. The lower friction pair can realize two modes of fixation and horizontal reciprocating motion under the clamping of the lower clamp.

The present application relates to the field of oil detection, and discloses an online engine oil ceramic wear debris ultrasonic detection sensor and a detection method, which adopts an ultrasonic detection sensor to perform online detection on ceramic wear debris in a lubricating oil system, a plurality of ultrasonic generators and ultrasonic receivers are arranged in a ring array or a multi-stage cascade mode in the sensor, each group corresponds to a focusing area, and a plurality of piezoelectric ceramic chips are arranged in each group, sound waves are split into a plurality of sub-waves to form a plurality of transmitting / receiving units; the lubricating oil is used as a propagation medium, when ceramic grinding exists in the lubricating oil in the corresponding focusing area, the signal received by the ultrasonic receiver is distorted, the signal received by the ultrasonic receiver is amplified and denoised by a signal processor, the processed signal is analyzed, the number and size of the wear debris in the lubricating oil system are indirectly evaluated, and the remaining life of an aero-engine bearing is predicted. The detection method is simple and reliable, and has high detection capability for small ceramic wear debris.

The invention relates to the technical field of friction material manufacturing, in particular to a wet-type paper-based friction material, a preparation method thereof and a friction plate. The material comprises a paper base layer and a controllable abrasive dust layer formed on the surface of the paper base layer, the paper base layer is wet paper base body paper impregnated with first resin, and the mass of the controllable abrasive dust layer accounts for 3%-8% of the mass of the paper base layer; the controllable abrasive dust layer comprises skeleton fibers, second resin, nano filler and polyether-ether-ketone microspheres. The preparation method comprises the following steps: carrying out turbulent flow treatment on a paper-based slurry, forming on a net under the action of ultrasonic waves, dehydrating and drying to obtain raw paper; the base paper is impregnated with first resin and cured to form a paper-based layer; mixing skeleton fibers, second resin, nano filler, polyether-ether-ketone microspheres and a dispersing agent to prepare 10-30wt% of coating liquid; and coating the coating liquid on the surface of the paper base layer, and drying and curing to obtain the wet-type paper-based friction material containing the paper base layer and the controllable abrasive dust layer. Therefore, according to the friction material, the friction interface can be actively repaired from passive wear resistance, the heat resistance and durability are improved, and the problem that in the prior art, durability attenuation is easily caused by microcrack propagation and insufficient heat resistance of the material is accurately solved.

The invention discloses wire harness buffing equipment for preventing abrasion dust accumulation. The wire harness buffing equipment comprises a first rough grinding mechanism, a second rough grinding mechanism, a first fine grinding mechanism and a second fine grinding mechanism which are of the same structure and are sequentially arranged. The first rough grinding mechanism comprises mounting plates which are in bilateral symmetry, large driving wheels and small rotating wheels are rotationally arranged on the two mounting plates, the large driving wheels and the small rotating wheels are assembled and connected through grinding belts with grinding particles on the surfaces, and the large driving wheels are driven by rotating motors mounted on the mounting plates; a cleaning unit is further arranged. Through the arrangement of the first rough grinding mechanism, the second rough grinding mechanism, the first fine grinding mechanism and the second fine grinding mechanism, grinding belts arranged left and right and arranged up and down are used for comprehensively grinding the wire harness, and in the grinding process, grinding dust generated by the grinding face can be thrown out under the action of centrifugal force of the rotating grinding belts, so that the grinding effect is improved. Abrasive dust cannot be accumulated at the grinding position, and good grinding of the wire harness can be achieved.

The application discloses a self-lubricating sliding bearing, and relates to the technical fields of mechanical transmission and sliding bearing, which comprises a bearing sleeve, a bearing inner sleeve arranged in the bearing sleeve, a liquid exchange space formed between the bearing inner sleeve and the bearing sleeve, a central rotating shaft arranged in the bearing inner sleeve, and a plurality of liquid guide grooves arranged on one side of the bearing inner sleeve close to the bearing sleeve. The self-lubricating sliding bearing realizes stable storage of lubricating liquid and controllable flow under pressure driving through cooperation of the liquid guide grooves arranged on the bearing inner sleeve and the first and second convex point groove structures with the upper part being wide and the lower part being narrow, effectively prevents liquid leakage, and utilizes liquid adsorption and removal of wear debris generated by the central rotating shaft in the rotating process, so that the problems of wear aggravation and channel blockage caused by debris accumulation in the prior art are solved.

To efficiently recover abrasion powder.SOLUTION: A wear debris collection device according to the present embodiment includes a dust collection device and an airflow passage. The dust collector has a dust collecting box provided in the vicinity of a brush base plate which is provided in a frame fixing part of the CT apparatus and supports a brush column, and a dust collecting fan communicating with the inside of the dust collecting box. The airflow passage is disposed on the brush base plate such that one end of the airflow passage is connected to the dust collector and the other end of the airflow passage is located near at least one of the brush post and the pin. When the dust collection fan operates, an airflow flowing from the vicinity of at least one of the brush post and the pin into the dust collection box is formed in the airflow passage. According to the present embodiment, by the operation of the dust collection fan, an air flow for moving the abrasion powder from the surface of the brush board into the dust collection box is formed in the vicinity of at least one of the brush column and the pin, and the abrasion powder accumulated in the vicinity of at least one of the brush column and the pin is reduced, so that the risk of short circuit between the W-phase, the V-phase, and the U-phase can be reduced.SELECTED DRAWING: Figure 7

The invention relates to an electromagnet, in particular to a wear-resistant small electromagnet, and solves the problems that the magnetic efficiency and the response speed are reduced and the surrounding environment is polluted by wear chippings due to the fact that a moving part of an existing electromagnet is worn, a mounting ring groove is formed in an inner cavity of a machine shell, and a sliding bearing is arranged in the mounting ring groove; a guide shaft in the armature assembly is located in a front through hole of a machine shell and a sliding bearing, an armature is arranged in an armature installation groove of the guide shaft, the armature is protected through the guide shaft, friction between the armature and the machine shell is converted into sliding contact between the guide shaft and the sliding bearing, and the guide shaft and the armature are matched through a notch and a protruding block. A magnetic circuit can pass through the armature, and the armature is prevented from being abraded as much as possible under the condition that the magnetic efficiency is reduced little; the buffer rings are arranged on the inner end faces of the magnet yoke and the armature, when the coil assembly is powered on, after the armature moves in place in the direction of the magnet yoke, the two buffer rings make contact with each other, and coating abrasion caused by impact between the armature and the magnet yoke is avoided.

This utility model discloses a wear resistance testing device for diamond composite materials, including a wear resistance testing frame. A horizontal plate is fixedly connected to the lower end of the wear resistance testing frame, and a testing chamber is provided at the upper end of the horizontal plate. It also includes a collection mechanism. The collection mechanism includes a lower collection hopper, an upper collection hopper, guide columns, a sliding plate, an auxiliary plate, and a collection chamber. The lower collection hopper is fixedly connected to the inside of the wear resistance testing frame, and a uniformly distributed filter screen is provided at the lower end of the lower collection hopper. Guide columns are fixedly connected to the four corners of the wear resistance testing frame, and a sliding plate is slidably connected to the upper end of the four guide columns. The lower end of the sliding plate is fixedly connected to the upper end of the upper collection hopper through symmetrically distributed support columns. This wear resistance testing device for diamond composite materials, by forming a small collection space with the upper and lower collection hoppers, facilitates the rapid collection of wear debris, greatly improving the accuracy of wear resistance testing for diamond composite materials.

This invention discloses a method for detecting the volume fraction of W-containing Laves phase in a sample, belonging to the field of metallic material testing technology. This invention provides a method for intuitively detecting the volume fraction of W-containing Laves phase in steel. The laser-clad sample containing the W-containing Laves phase undergoes surface pretreatment to remove surface oxide scale and processing burrs. Ultrasonic cleaning thoroughly removes residual oil, wear debris, and other impurities from the sample surface. High-temperature heat treatment makes the previously difficult-to-distinguish W-containing Laves phase clearly visible. Fine processing of the detection surface ensures a smooth and flat surface, providing a clear observation interface for microscopic morphology observation and compositional analysis. After sample characterization, EDS energy dispersive spectroscopy is used to obtain elemental distribution characteristics. Quantitative calculations are performed on the unoxidized areas of the sample to obtain the volume fraction of the W-containing Laves phase. This provides important data support for material composition design, heat treatment process optimization, service life assessment, failure analysis, and mechanism analysis.

The present application relates to the field of tribology and material cross, in particular to a kind of surface structure preparation method for improving the wear resistance of B4C ceramic to realize self-lubrication.Firstly, B4C and Al2O3 powder are weighed, ball-milled, dried and sieved to obtain mixed powder;Then the mixed powder is hot-pressed and sintered to obtain a block;The block is ground and polished to obtain the final B4C-Al2O3 composite ceramic.The B4C-Al2O3 composite ceramic prepared by the present application can form a concave-convex relief structure in situ on the wear surface during dry sliding due to the hardness difference between B4C and Al2O3 two phases.On the one hand, the relief structure can trap the nanoscale wear debris generated during sliding, reducing abrasive wear;On the other hand, the relief structure can reduce the real contact area between B4C ceramic and the counterbody, thereby effectively reducing the adhesive wear of B4C ceramic, improving the wear resistance of B4C ceramic and realizing self-lubrication.

This invention provides a gradient silicon nitride ceramic femoral head prosthesis and its preparation method, relating to the technical fields of clinical medicine and biomaterials. The femoral head prosthesis is prepared from 88-94 parts of silicon nitride powder, 4-12 parts of sintering aid, 5-20 parts of tungsten carbide titanium, and 0-30 parts of pore-forming agent, wherein the pore-forming agent cannot be 0 parts. The gradient silicon nitride ceramic femoral head prosthesis of this invention retains the advantages of silicon nitride ceramics—low wear, low friction, high strength, high fracture toughness, and good chemical stability—at the interface between the femoral head prosthesis and the liner, while reducing wear on the titanium alloy femoral stem cone caused by the large hardness difference between the femoral head prosthesis and the liner. This reduces the incidence of organ toxicity, periprosthetic osteolysis, and aseptic loosening caused by metal wear debris, improves the survival rate of the femoral head prosthesis and the femoral stem cone, reduces the revision rate of replacement surgery, and saves patients' treatment costs.

The application relates to the technical field of mechanical property testing, in particular to a tension test equipment which comprises a vertical fixed stand column, a fixed seat is fixedly connected to the top of the stand column, a plurality of straight grooves are arranged in the fixed seat, and a sliding block is slidably arranged in the straight groove; a shell is fixed on the top of the sliding block, a sliding hole is vertically arranged on the top of the shell, and the sliding hole is used for accommodating a supporting rod to slide in and out of the shell; and a scraper is fixed on the top of the shell through a connecting structure, and the cutting edge of the scraper abuts against the surface of the supporting rod. The supporting rod distributed on the fixed seat in a circumferential direction is subjected to centrifugal motion, the closed loop wire belt is subjected to a stretching test, the stress distribution under the annular stress state of the wire belt is simulated, and the accuracy of test data is improved. The scraper forms a scanning track relative to the surface of the supporting rod through the lifting of the supporting rod, and there is no cleaning dead angle. The abrasion debris is prevented from adhering to the surface of the supporting rod, and the test precision of the next time is affected.

An object of the present invention is to provide an abrasion powder collection device and an abrasion powder collection method capable of collecting abrasion powder by a simple method.SOLUTION: A wear debris collection device according to an aspect of the present disclosure includes a first member configured to be rotatable about a first axis, a pressing mechanism configured to press a second member rotatable about a second axis against the first member, and a collection portion configured to collect wear debris generated by rotational friction between the second member and the first member. A method of collecting abrasion powder according to the present disclosure includes an abrasion step of pressing a second member rotating around a second axis against a first member rotating around a first axis to cause rotational friction between the first member and the second member, and a collection step of collecting abrasion powder generated by the rotational friction between the second member and the rotating first member by a collection portion.SELECTED DRAWING: Figure 1

The invention discloses a preparation method of a zirconium-based alloy in-situ oxidation coating for a joint prosthesis, the medical joint prosthesis and application, the method is suitable for zirconium-based alloys (containing Zr-2. 5Nb, Zr-Nb-Ti, Zr-Mo-Nb and other systems) prepared or forged through electron beam melting (EBM) and selective laser melting (SLM), oxygen atoms are promoted to diffuse into the material by repeatedly creating oxygen concentration gradients, and the oxygen concentration gradient of the zirconium-based alloys (containing Zr-2. 5Nb, Zr-Nb-Ti, Zr-Mo-Nb and other systems) is increased. And a high-oxygen diffusion transition layer and the ZrO-based in-situ oxidation ceramic coating are accurately formed, and meanwhile, a coupling mathematical model of oxidation temperature (T)-ceramic coating thickness (d)-wear resistance (WR) is established, so that double accurate regulation and control of the coating performance and the product size are realized. The prepared coating is tightly combined with the matrix through the high-oxygen diffusion transition layer, the depth of the transition layer exceeds that of a traditional process by 40% or above, and the size variation of the prosthesis after oxidation is smaller than or equal to + / -0.01 mm; the surface hardness of the coating is larger than or equal to 1053 Hv, the wear rate is smaller than or equal to 0.8 * 10 mm / (Nm), the wear resistance and size stability of the zirconium-based alloy are remarkably improved, the problems of sterile looseness and out-of-control size precision caused by wear chippings in long-term service of joint prostheses are solved, and the method is suitable for large-scale production of medical joint prostheses such as hip joints and knee joints.

The invention discloses a running-in method for improving power generation characteristics of a friction nanometer generator, and relates to the technical field of friction nanometer power generation. The friction surface of the friction nanometer generator is subjected to running-in treatment in a reciprocating operation mode, then the friction surface subjected to running-in treatment is cleaned, a lubricant is added to the friction surface, and friction electrification is performed in the reciprocating operation mode; through collaborative design of friction surface pre-running-in, surface cleaning and lubrication electrification, the problem of charge shielding caused by serious abrasion of friction materials and accumulation of abrasive dust and transfer materials in the initial transient state of an existing friction nano-generator is accurately solved, friction loss in the initial stage is effectively reduced, and the service life of the friction nano-generator is prolonged. Meanwhile, surface modification of the electronegative friction layer is achieved, the electrification capacity and charge storage stability of the friction layer are remarkably improved, key technical support is provided for wide application of the friction nano-generator in the fields of energy collection, self-powered technology and sensors, and the friction nano-generator has good practical value and application prospect.

The present invention provides an elevator door device including a door rail, a door part configured to move by rolling of a roller on the door rail, a door drive part, and a wear-debris adhesion suppression part extending in an opening and closing direction of the door part. The door drive part includes a motor part configured to drive and rotate a drive pulley, a driven pulley disposed apart from the drive pulley in the opening and closing direction, and an endless belt that is wound around the drive pulley and the driven pulley, and to which the door part is connected. The door rail is located below the drive pulley. The wear-debris adhesion suppression part is disposed between the drive pulley, and the door rail and the roller, and disposed at a position corresponding to the drive pulley in the opening and closing direction.

The utility model relates to a sealing structure for a main shaft of a kneading machine. The sealing structure comprises a polytetrafluoroethylene sealing ring, a polytetrafluoroethylene woven packing and a labyrinth seal, the polytetrafluoroethylene sealing ring and the polytetrafluoroethylene braided packing are installed on a shaft neck of a main shaft of the kneading machine, the polytetrafluoroethylene sealing ring is located in front of the polytetrafluoroethylene braided packing and is a static seal, and a gap delta is formed between the polytetrafluoroethylene sealing ring and the shaft neck of the main shaft of the kneading machine through accurate control or running-in; the shaft neck of the kneading machine main shaft is further provided with a movable ring and a static ring, the movable ring and the static ring are located between the polytetrafluoroethylene sealing ring and the polytetrafluoroethylene woven packing, the static ring is arranged on the outer side of the movable ring in a sleeved mode, and an axial labyrinth is formed between the static ring and the movable ring to form a labyrinth seal. The sealing structure can block leakage of materials in a container, achieves the effect of sealing the shaft neck of the main shaft of the kneading machine, and meanwhile can effectively prevent abrasive dust generated by abrasion of packing forming sealing from invading the kneading machine to cause pollution.

The application provides a support assembly and a compressor with the same, which comprises a support seat and a filter piece connected with each other, the support seat is provided with a avoiding through hole, the filter piece and the support seat form a filter cavity, a stop piece, a crank structure and a hydraulic pump in the filter cavity, a part of the crank structure is rotatably arranged in the avoiding through hole and supported on the stop piece, the stop piece is provided with an oil passage hole, another part of the crank structure is arranged in the oil passage hole and connected with the hydraulic pump, an oil inlet channel is formed between the hole wall of the oil passage hole and the other part of the crank structure, a communication channel is formed between the stop piece and the part of the crank structure and communicated with the oil inlet channel, an oil passage is arranged on the support seat, an oil inlet end of the oil passage is communicated with the communication channel, and an oil outlet end of the oil passage is located outside the filter cavity. Through the technical scheme, the technical problem that the wear debris generated due to wear of the tail part of the crank structure in the prior art is easily sucked into the oil pump can be solved.

The invention provides a self-texturing HVOF / PVD composite coating as well as a preparation method and application thereof, and relates to the technical field of surface coatings. The self-texturing HVOF / PVD composite coating comprises a metal matrix, a NiCr-Cr3C2 metal ceramic supporting layer, a Cr bonding layer, a Cr / CrxCy gradient transition layer and a DLC thin film layer. The surface of the NiCr-Cr3C2 metal ceramic supporting layer is provided with a self-texture morphology formed through corrosion. The self-texture micro-pit structure is formed on the surface of the NiCr-Cr3C2 metal ceramic supporting layer, the self-texture micro-pits serve as an oil storage pool and a scrap storage pool, lubricating oil can be effectively stored in an oil lubricating environment, abrasive dust can be captured, secondary scratching caused by accumulation of the abrasive dust in a friction contact area is avoided, the friction coefficient of the composite coating is remarkably reduced, and the service life of the composite coating is prolonged. The antifriction and antiwear properties of the coating are improved, the service life of the coating is prolonged, and good application prospects are achieved.