35 results about "Wear debris" patented technology

The simulation experiment device for the frictional wear behavior of the surface of the artificial hip joint sample comprises a rack, a hydraulic loading mechanism, a hip joint simulation opposite-grinding pair mechanism, a composite motion mechanism, a lubricating liquid adding mechanism and an abrasive dust adding mechanism, and the simplification of the opposite-grinding pair structure and the simulation of an opposite-grinding track are both considered; a lubricating liquid adding mechanism and an abrasive dust adding mechanism are introduced in combination with actual conditions, artificial hip joint friction wear simulation under different lubricating conditions and abrasive dust forming conditions can be better simulated, and the artificial hip joint friction wear simulation device is more suitable for artificial joint material performance evaluation and selection under laboratory conditions.

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.

To provide an X-ray CT apparatus that allows abrasion powder to be recovered while a rotary frame is rotating.SOLUTION: An X-ray CT apparatus includes: a fixed frame; a rotary frame that can rotate relative to the fixed frame, and is equipped with an X-ray source and an X-ray detector; a slip ring that rotates in synchronization with the rotary frame; an electric power supply brush and a signal transmission brush brought into contact with the slip ring; a cover for covering the slip ring, the electric power supply brush, and the signal transmission brush; and a collection container with an opening provided in the cover for collecting abrasion powder, the opening being positioned downward in a gravity direction relative to the electric power supply brush, and extending to a side in a progressing direction of an air flow generated by the rotation of the slip ring.SELECTED DRAWING: Figure 8

The present invention relates to the technical field of medical orthopedic bionic materials, specifically a printed metal and polyethylene integrated knee joint prosthesis and a preparation method. Any one of tantalum, titanium, titanium alloy, zirconium-niobium alloy, and cobalt-chromium alloy is used to print a 3D printed metal component. The 3D printed metal component is integrally formed by 3D printing, and from top to bottom, there are a porous structure 1, a solid structure, and a porous structure 2. The porous structure 2 is combined with the polyethylene component by injection molding or hot pressing. The middle is the solid structure, and the bottom layer is the porous structure 2. The porous structure 2 is combined with the polyethylene. The polymer polyethylene material is ball milled to make the solid powder of the polymer polyethylene after molding more evenly distributed and the gap smaller, thereby improving the mechanical properties and internal wear properties of the material, and avoiding adverse events such as ion poisoning caused by metal 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 relates to the technical field of oil liquid monitoring, and discloses a visual imaging oil liquid abrasive dust in-situ detection device and a visual imaging oil liquid abrasive dust in-situ detection system. Wherein the light-transmitting tempered glass slide is attached to the wall of an inner cavity of the flow channel, the flow guide column is arranged in the inner cavity of the flow channel, an approximately-annular oil cavity is formed between the flow guide column and the light-transmitting tempered glass slide, and the flow guide column divides oil entering the flow channel to enable the oil to enter the oil cavity; the magnet is connected with the magnet exciting coil, is embedded into the runner and is attached to the outer surface of the light-transmitting tempered glass slide; electrifying the magnet exciting coil, and generating a magnetic field at an air gap between the N pole and the S pole of the magnet, so that the metal abrasive dust in the oil in the oil cavity is adsorbed at the air gap between the light-transmitting tempered glass slide and the magnet; light rays are radiated through the light source to illuminate abrasive dust, reflected light on the surface of the abrasive dust is imaged on the light sensing surface of the image device through the optical lens to form an abrasive dust image, in-situ detection of the oil abrasive dust is carried out through the abrasive dust image, and the detection efficiency of the oil abrasive dust is improved.

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.

The utility model discloses a microtexture suitable for the antifriction of the surface of a cam tappet, which comprises an antifriction texture, the antifriction texture is crescent and is in a pit shape towards the inside of the tappet, and the single antifriction texture is circumferentially arrayed to form an annular microtexture and is arranged on the contact surface of the tappet and a cam; the multiple annular microtextures are arranged at intervals in the radial direction of the tappet surface, and the surface concave textures are in a crescent shape and evenly distributed on the GCr15 steel surface according to a certain rule. The crescent-shaped pit texture is designed, so that when lubricating oil is driven by a surface base body to move in the movement direction, a large area can be generated at the tail of a plane to obtain a high-pressure area and a large pressure peak value, small cavitation is generated at the front end of the texture, and the area of a low-pressure area can be effectively reduced; and certain abrasive dust can be stored, the contact area with a cam can be reduced, and the surface adhesion force can be reduced, so that excellent tribological performance is obtained under the condition of flowing lubrication, and the bearing capacity between friction pairs is improved.

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

An embodiment of the present invention provides a C-arm support device and medical equipment. The C-arm support device includes a C-arm holder, a C-arm and a track sealing device. A wheel axle assembly is installed on the C-arm holder, and the wheel axle assembly includes an axle installed on the C-arm holder and a guide wheel that can rotate around the axle. A moving track is provided on the C-arm, and the moving track has an open track surface for the wheel axle assembly to roll through. A guide rail that cooperates with the guide wheel is provided in the moving track, and the guide rail can roll around the guide wheel, thereby driving the C-arm to roll relative to the C-arm holder. The track sealing device is used to seal the open track surface of the C-arm. The C-arm support device and medical equipment of the embodiment of the present invention can effectively reduce the spread of wear debris to the external space.

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.

The present invention relates to the field of oil monitoring technology, and discloses a visual imaging oil wear debris in-situ detection device and system. A translucent tempered glass slide is attached to the inner wall of a flow channel, a guide column is placed in the inner cavity of the flow channel, and an approximately annular oil cavity is formed between the guide column and the translucent tempered glass slide. The guide column diverts the oil entering the flow channel so that it enters the oil cavity; a magnet is connected to an excitation coil and embedded in the flow channel and adheres to the outer surface of the translucent tempered glass slide; power is applied to the excitation coil to generate a magnetic field in the air gap between the N pole and the S pole of the magnet, so that the metal wear debris in the oil in the oil cavity is adsorbed in the air gap between the translucent tempered glass slide and the magnet; light is radiated by a light source to illuminate the wear debris, so that the reflected light on the wear debris surface is imaged on the photosensitive surface of the imaging device through an optical lens, forming a wear debris image, and the wear debris image is used to perform in-situ detection of oil wear debris, thereby improving the detection efficiency of oil wear debris.

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.

The invention discloses a wear-resistant 3D oriented texture capable of manipulating abrasive dust on the surface of a bearing and a manufacturing method of the wear-resistant 3D oriented texture, and relates to the technical field of surface treatment of the bearing, the 3D oriented texture comprises a plurality of sawtooth structures arranged on the surface of the bearing, each sawtooth structure comprises a plurality of tooth grooves, each tooth groove comprises a first side wall and a second side wall, the included angle A between the first side wall and the second side wall is an obtuse angle, and the length d1 of the first side wall is smaller than the length d2 of the second side wall. According to the invention, the 3D oriented texture capable of controlling the movement of the abrasive dust particles and forming the friction film is designed on the surface of the bearing steel, so that the purpose of turning waste into wealth is achieved by utilizing the abrasive dust to resist wear.

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 invention relates to the technical field of centrifugal compressors, in particular to a compressor. The compressor comprises a shell assembly, a rotating shaft assembly, a protection bearing and an impeller, the rotating shaft assembly is arranged in the shell assembly, a purging channel is formed between the rotating shaft assembly and the shell assembly, the protection bearing is arranged on the rotating shaft assembly in a sleeving mode and located between the rotating shaft assembly and the shell assembly, an airflow gap is formed in the protection bearing, and the impeller is connected with the rotating shaft assembly. And in the axial direction of the rotating shaft assembly, the two opposite sides of the impeller and the shell assembly form an air inlet cavity and a blowing cavity which are communicated, the pressure of the air inlet cavity is larger than that of the blowing cavity, the air inlet end of the blowing channel is communicated with the blowing cavity, and the air outlet end of the blowing channel is communicated with the airflow gap. According to the compressor in the embodiment, airflow enters and penetrates through the airflow gap of the protective bearing along the purging channel, so that possible abrasive dust inside the protective bearing or tiny dust entering from the outside is taken away, and the cleaning effect is achieved.

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 present invention relates to a hybrid excitation rotor with a slip ring structure applied in the field of motor rotors. Through the cooperation of a dust collecting barrel and a rotating dust collecting barrel, when the excitation rotor in the motor is subjected to air cooling and heat dissipation, the airflow in the motor is utilized to drive the power structure to move, thereby driving the rotating dust collecting barrel to rotate, thereby transferring the collected wear debris exposed outside the rotating dust collecting barrel to the inside of the dust collecting barrel, and then pushing away the wear debris dust adsorbed on the surface of the electrostatic plate through the magnetic attraction of the magnetic plate and the magnetic slider, thereby realizing a cycle of wear debris collection, collection, and re-collection, thereby realizing sustainable dust collection on the surface of the rotating dust collecting barrel, and during air cooling and heat dissipation, utilizing a driving component to replace the electromagnetic block to assist in realizing the staggered heat dissipation of the combined slip ring and reduce the use of electricity.

The invention provides a polishing pad abrasion resistance testing device and method, the testing device comprises a workbench, a sample table and an abrasion testing unit, the sample table comprises a chassis and a clamping plate, the bottom end of the chassis is rotatably installed on the workbench around the vertical axis, the top end of the chassis is used for placing a to-be-tested polishing pad sample, and the clamping plate is arranged above the to-be-tested polishing pad sample; the abrasion testing unit comprises an abrasion assembly and a dust collection assembly, the abrasion assembly and the dust collection assembly are both arranged on the workbench, the abrasion assembly is used for conducting abrasion resistance testing on the to-be-tested polishing pad sample located on the outer edge of the clamping plate, and the dust collection assembly is used for absorbing abrasion chippings generated on the surface of the to-be-tested polishing pad sample in the abrasion resistance testing process. According to the testing device, abrasion resistance testing is conducted by simulating the using condition of the polishing pad in the mechanical polishing process, the unified testing device and judgment standard are provided for abrasion resistance testing of different polishing pads, and the influence of residues obtained after abrasion of the polishing pad in the using process on polished products can be effectively controlled.

The utility model discloses an efficient granular material cleaning system which comprises an ultrasonic cleaning device, a pickling device, an ultrasonic rinsing device, a dewatering device and a vibration type conveying device, and the ultrasonic cleaning device, the pickling device, the ultrasonic rinsing device and the dewatering device are all arranged on the vibration type conveying device. An output port of the ultrasonic cleaning device is arranged in an input port of the pickling device, an output port of the pickling device is arranged in an input port of the ultrasonic rinsing device, and an output port of the ultrasonic rinsing device is arranged in an input port of the dewatering device. Particle materials are subjected to dust removal treatment through the ultrasonic cleaning device, then enter the acid pickling device to be subjected to metal abrasion chip removal work, then enter the ultrasonic rinsing device to be subjected to acid pickling solution removal work, and finally are subjected to sufficient dehydration through the dehydration device, in the whole process, the cleaning efficiency is improved, and the energy consumption is reduced. And overturning cleaning of particle materials can be achieved.

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 utility model provides a microtexture piston pin, which belongs to the technical field of mechanical structure lubrication, and comprises a piston pin, a piston body and a connecting rod, the piston body and the connecting rod are matched with the piston pin, the piston body is connected with the connecting rod through the piston pin, a first sine groove texture is arranged on the surface of the piston pin along the circumferential direction of the piston pin, and a second sine groove texture is arranged on the surface of the piston pin. A plurality of first sine groove textures are sequentially arranged on the surface of the piston pin in the axial direction of the piston pin. The first sine groove texture is a micro-texture groove body, the micro-texture groove body is arranged to be a sine line groove, the sine line groove is a curve micro-texture groove body, compared with a linear micro-texture groove body, more lubricating oil can be stored, and compared with other curve micro-texture groove bodies, the sine line groove can store more lubricating oil. Compared with the prior art, the sine line grooves are larger than the surface area of the piston pin, the amount of stored lubricating oil is large, meanwhile, the abrasive dust capturing capacity is high, the lubricating effect on the piston pin is enhanced, and heat dissipation is enhanced.