39 results about "Adhesive wear" patented technology

The invention discloses a pump body assembly, a compressor and refrigeration equipment, and relates to the technical field of compressors, the pump body assembly comprises an air cylinder, a pump body, a pump body, a pump body, a pump body and a pump body, and the air cylinder is provided with a working cavity and a sliding groove communicated with the working cavity; the piston is eccentrically and rotatably arranged in the working cavity; the sliding piece comprises a sliding piece body and a hinge portion arranged at one end of the sliding piece body, the sliding piece body is arranged in the sliding groove in a sliding mode, the hinge portion is hinged to the piston and provided with a first opposite-grinding face, the piston is provided with a second opposite-grinding face in contact with the first opposite-grinding face, and the second opposite-grinding face is provided with a second opposite-grinding face in contact with the second opposite-grinding face. The surface hardness of the first counter-grinding surface is at least 30% higher than that of the second counter-grinding surface. According to the technical scheme, adhesive abrasion can be effectively reduced, and the problem that abrasion of a hinge structure is aggravated is solved.

The invention provides a tensile testing machine for testing a basalt fiber super-viscous wearing layer, and belongs to the technical field of pavement material tensile testing devices.The tensile testing machine comprises a base component, clamping head assemblies, a constant-temperature cover assembly, a bottom driving assembly and a cooling and heating all-in-one machine, and the clamping head assemblies are arranged in the base component in pairs; constant-temperature covers are screwed to the two sides of one end of a base component in pairs, a clamping base in a clamping head assembly at the bottom is fixedly connected with the inner bottom of the base component, clamping heads are slidably connected to the inner side face of a trapezoidal groove formed in the head end of the clamping base in pairs, an inner sliding block is transversely slidably connected to the tail ends of the two sets of clamping heads jointly, and an adjusting bolt is vertically connected to a main body of the clamping base in a threaded mode. The head end of the adjusting bolt is screwed with the inner sliding block, so that when the bottom driving assembly drives the clamping head assembly at the bottom to carry out clamping, the constant-temperature cover can be driven to form a rotary closing action, and the constant-temperature cover can be communicated with the cold and hot all-in-one machine only after the constant-temperature cover is closed in place and a closed space is formed for a test piece between the outer surfaces of the two groups of clamping seats, so that safety and reliability are realized.

The invention belongs to the technical field of drilling tools, and discloses a coating drilling tool and a machining method.The coating drilling tool comprises a drill tip part, the drill tip part comprises a front tool face and two tool end faces, the two tool end faces intersect to form a chisel edge, each tool end face comprises a first rear tool face, and the first rear tool faces intersect with the front tool face to form a main cutting edge; the drill tip part further comprises a first machining area, the first machining area is arranged on the front tool face and intersects with the main cutting edge, a first micro-texture is arranged in the first machining area, and / or the drill tip part further comprises a second machining area, the second machining area is arranged on the first rear tool face and intersects with the chisel edge and the main cutting edge, and a second micro-texture is arranged in the second machining area. A second microstructure is arranged in the second machining area. The first microtextures and the second microtextures can improve the surface roughness of the front tool face and the first rear tool face, improve the coating binding force, slow down tool abrasion, improve the cutting performance and reduce abrasive particle abrasion and bonding abrasion between interfaces.

The application discloses a high-speed current-carrying friction in-situ test system and relates to the technical field of precision instruments, which comprises a macro-micro power loading module, a constant force loading module, a current loading module, a force monitoring module and an in-situ detection module. The macro-micro power loading module controls the relative motion of the friction pair to be tested. The current loading module is used for loading current between friction amplitudes. The in-situ monitoring module comprises three in-situ monitoring means, namely acoustic emission, infrared thermal imaging and a high-speed camera. The application can support the test of high-speed current-carrying friction conditions such as multi-angle and multi-posture macro-micro-motion-static coupling, and can simultaneously acquire time sequence information of temperature fields, optics, acoustics and vibration, and further acquire time sequence information of thermal energy, arc intensity, adhesive wear degree, fatigue wear degree and deformation energy of the friction pair, which helps to deeply understand the failure mechanism and modification mechanism of high-speed multi-condition current-carrying friction amplitude and accelerates the optimization work of the current-carrying friction performance of the current-carrying friction pair.

The application belongs to the technical field of rubber seal test, and relates to a method for predicting the service life of an aviation dynamic sealing ring based on gap leakage analysis, which comprises the following steps: S1, performing a service life pre-test of the aviation dynamic sealing ring, performing a sealing ring life investigation, and determining a sealing ring failure criterion; S2, performing a sealing ring life model correction test, and recording life correction parameters in the test process; S3, obtaining an aviation dynamic sealing ring wear variable according to Archard adhesive wear analysis and gap leakage analysis; S4, calculating the wear of the aviation dynamic sealing ring, establishing a sealing state judgment standard equation of the aviation dynamic sealing ring, and determining a working state; and S5, establishing an aging prediction model of the aviation dynamic sealing ring under a target working condition, and completing service life prediction and evaluation. The application replaces the traditional sealing ring size measurement with leakage to avoid complex disassembly and assembly of the sealing ring test, reduces non-experimental wear of the sealing ring, and establishes an accurate life prediction model.

The invention discloses alloy powder for repairing an H13 steel piercing needle and a repairing method of the alloy powder, and belongs to the technical field of extrusion die repairing. The alloy powder is a Co-based high-temperature alloy and comprises the following components in percentage by mass: 45.0 to 50.0 percent of Co, 15.0 to 20.0 percent of Cr, 26.0 to 29.0 percent of Mo, 0.1 to 0.3 percent of Ni, 2.0 to 4.0 percent of Si, 1.0 to 3.0 percent of B and 0.05 to 0.1 percent of C. During repairing, firstly, the surface of the perforating needle is pretreated, then the GH4169 alloy transition layer and the Co-based alloy functional layer are sequentially cladded through the laser cladding technology, and a hard-soft-hard three-layer gradient structure is formed. Through special alloy component design and gradient structure innovation, cracking of a repairing layer is effectively restrained, high-strength metallurgical bonding of the repairing layer and a base body is achieved, the repaired perforating needle has excellent high-temperature resistance, adhesive wear resistance and deformation resistance, the service life of the perforating needle is remarkably prolonged, and the repairing cost is reduced. The method is suitable for repairing and strengthening the copper alloy extrusion die.

The invention relates to the field of tools for machining, and discloses a tool for machining a turbine disc and a preparation method of the tool for machining the turbine disc, the magnetic axis complexity of a hard alloy blank is reduced by adjusting WC-Co hard alloy element components of a base material, and the magnetic axis orientation distribution in the hard alloy blank is changed by using magnetic lines of force in an external polar region, so that the machining precision of the turbine disc is improved. The hard alloy blank is soft and smooth and shows single-orientation distribution of magnetic lines; a drift diffusion mode is combined, low-pressure non-equilibrium plasma nitrogen migration is guided, a wear-resistant phase with higher hardness is formed on the surface of the cutter without affecting the geometrical shape of the cutter, and therefore nitrogen ion directional guiding is achieved, and a nitrogen element gradient distribution structure is achieved on the surface of the hard alloy cutter; therefore, the surface hardness and the high-temperature resistance of the hard alloy cutter material are improved, and adhesive abrasion and groove abrasion generated in the machining process of the turbine disc alloy material by the hard alloy cutter are reduced.

The invention discloses a repairing method for quickly repairing the surface of a bearing. The repairing method comprises the following steps: providing a composite bearing to be repaired; the abrasion type of the composite material layer of the composite bearing to be repaired is analyzed; when the abrasion type is adhesive abrasion, the repairing structure comprises two layers, namely a bottom coating and an abrasion-resistant layer; when the abrasion type is abrasive grain abrasion, the repairing structure comprises a bottom coating and an abrasion-resistant layer. When the abrasion type is fatigue abrasion, the repairing structure comprises a bottom coating, a reinforcing layer and an antifriction lubricating layer. According to different abrasion types, the composite bearing to be repaired is coated with the repairing material in a blade coating mode, and then all layers are subjected to light curing; and after curing, abrasive paper is used for surface polishing treatment, and the convex points are removed. According to the repairing method, the surface of the lining can be quickly repaired according to different abrasion types of the lining, so that the shutdown maintenance time can be shortened, the service life of the original lining is prolonged, and the stable performance of the lining is kept.

The invention discloses a nano alternating coherent growth composite coating special for honeycomb composite material processing and a preparation method thereof. The nano alternating coherent growth composite coating sequentially comprises an AlTiSiN / ZrN alternating layer, an AlTiSiN functional layer and a TiAlN transition layer from outside to inside. The mismatch degree mismatch value between the ZrN layer and the AlTiSiN layer is delta < lt >; the formed AlTiSiN / ZrN alternating layer coating has the characteristics of high surface toughness, excellent adhesion resistance and excellent wear resistance; the TiAlN transition layer is deposited in a gradient mode, the coating structure is in continuous gradient transition through gradient target current, matrix bias voltage and gas flow, the residual stress of the coating is low, and the bonding strength is high; the high Al and Zr elements are doped in the coating, the oxidation resistance of the coating can be guaranteed, the friction coefficient of the coating can be reduced, in the honeycomb composite material cutting process, adhesive abrasion is reduced, the TiAlN transition layer and the AlTiSiN functional layer which are of a compact continuous gradual change structure serve as supports of the multiple nanometer alternating layers AlTiSiN / ZrN, and therefore the honeycomb composite material cutting performance is improved. And the bonding strength, fracture toughness, wear resistance and oxidation resistance of the coating are improved, so that the service life of the cutter is prolonged.

This application provides a control method for a stick-slip piezoelectric actuator throughout its entire lifecycle, comprising: obtaining a contact force reference value using the equation of the driving characteristic surface; acquiring contact force data from a database; calculating a contact force compensation value and converting it into a compensation voltage for the vertical piezoelectric stack; acquiring step displacement and actual contact force data; obtaining the total wear volume using the Archard adhesive wear model based on the step displacement and voltage data of the vertical piezoelectric stack; proportionally allocating the total wear volume to the slider and driving foot using a wear distribution method based on material hardness; storing the obtained slider wear data, driving foot wear data, and actual contact force data in a contact force database; and predicting contact force data for non-cyclic working ranges based on slider wear data and driving foot wear data within the cyclic working range, and storing this prediction in the database. This method can effectively improve the driving stability of the stick-slip piezoelectric actuator throughout its entire working stroke and lifecycle.

An end face anti-sticking torque sucker rod comprises a rod body, rod heads, couplings, threaded portions and shoulders, the rod heads are arranged at the two ends of the rod body, the couplings are connected to the rod heads in a screwed mode, the threaded portions are arranged in the couplings, and the shoulders are arranged at the positions, close to the rod heads, of the rod body. The torque sucker rod has the advantages that adhesion abrasion of the contact surface is reduced, abrasion of the end surface is reduced, the service life of the torque sucker rod is prolonged, the reliability of rod-column connection is improved, the end surface of the external thread shoulder of the torque sucker rod is hardened, a phosphating film on the end surface of the coupling is removed, and the adhesion abrasion of the contact surface can be reduced.

The application discloses a kind of automobile wear pad assembly and process method, including universal joint, wear pad assembly, universal joint axle, wheel hub axle;Ball cage bearing is installed in the inside of universal joint, universal joint axle on universal joint passes through wheel hub, and wear pad assembly is arranged in the contact position of the end of universal joint axle and wheel hub, universal joint axle is connected with wheel hub spline, and universal joint axle is locked by lock nut;When universal joint is subjected to instantaneous torque, torque is transmitted to wheel hub by spline, at this time, it will generate adhesive friction on wear pad assembly at the contact of wheel hub bearing and fixed end universal joint end face.Can guarantee the durability of its product performance, effectively reduce the friction coefficient between its and contact surface, reduce adhesive wear, and then play the noise reduction effect, can effectively improve the wear resistance and reduce noise generated between the contact surface of the fixed end universal joint end face of automobile transmission shaft / drive shaft and wheel hub bearing.

The present invention discloses a cobalt-based high-temperature alloy, a key shaft, and a method for preparing the alloy that are resistant to adhesive wear, and belongs to the technical field of alloy processing. The present invention solves the problems in the prior art that cobalt-based high-temperature alloys are prone to forming banded structures, have poor wear resistance, and have large amounts of adhesive wear on friction pairs. The preparation method comprises: performing homogenization heat treatment on a cobalt-based alloy ingot; performing multi-directional forging on the cobalt-based alloy ingot that has undergone homogenization heat treatment to obtain a rod; performing secondary homogenization heat treatment on the rod; hot rolling the rod after the secondary homogenization heat treatment to obtain a rod; and performing finished product processing on the rod to obtain a cobalt-based high-temperature alloy rod with excellent adhesive wear resistance. The present invention can effectively eliminate the banded structure of the alloy through multi-directional forging and secondary homogenization heat treatment, obtain a uniform and fine grain structure and uniformly distributed carbides, improve the uniformity of the alloy structure, and at the same time improve the wear resistance of the alloy, especially reduce the amount of adhesive wear on the friction pair.

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 titanium carbide wear-resistant composite plate for a valve and a preparation method of the titanium carbide wear-resistant composite plate, and relates to the technical field of metallurgy and steel rolling. The titanium carbide wear-resistant composite plate for the valve comprises a composite plate, a titanium carbide-based metal ceramic plate is arranged on one side of the composite plate, and a carbon steel-based plate is arranged on the other side of the composite plate. According to the titanium carbide wear-resistant composite plate for the valve and the preparation method of the titanium carbide wear-resistant composite plate, the titanium carbide-based metal ceramic and the carbon steel-based plate are combined to manufacture the composite plate, and the titanium carbide-based metal ceramic has extremely high hardness and excellent abrasive wear resistance, adhesive wear resistance and erosive wear resistance; wherein the ceramic layer of the titanium carbide-based metal ceramic can resist abrasion caused by an abrasion medium in the using process of the valve, the service life can be prolonged, the maintenance and replacement frequency of the valve can be reduced, meanwhile, the attached faces of the two plates are cleaned through the cleaning mechanism, the influence caused by impurities can be avoided, and the service life of the valve is prolonged. And the service life of the valve made of the composite board is further prolonged.

The application discloses a kind of oxidized coal pitch nanocarbon material modified water-related polymer friction pair materials and preparation method, belong to polymer material technical field.The water-related polymer friction pair material of the present application is made of soluble oxidized pitch nanomaterial of formic acid / hydrogen peroxide oxidation system oxidation coal pitch and ultra-high molecular weight polyethylene matrix.The present application utilizes the gap of polymer molecular chain of soluble oxidized pitch nanomaterial of ultra-small structure, and plastic rheology and adhesive wear of material are reduced in friction process by steric hindrance and interface anchoring effect;Combination of the "nanometer reinforcing network" formed by uniform dispersion can effectively transfer friction stress, avoid the matrix cracking caused by local stress concentration;While the nanometer size of soluble oxidized pitch nanomaterial and carbon-based characteristics give it unique dynamic lubrication function, its surface abundant functional groups can form high density, strong adhesion transfer film, significantly improve the wear resistance and service life of composite material.

Provided is a ball screw in which the occurrence of adhesive wear can be reduced and stable driving can be maintained even in severe environments for lubricating, such as an underwater environment or an environment constantly exposed to water. The ball screw includes: a stainless steel screw shaft (21) having an outer circumferential screw groove (21a) formed in the outer circumferential surface; a stainless steel nut (22) having an inner circumferential screw groove (22a) formed in the inner circumferential surface; a plurality of balls (23) accommodated in a rolling path formed with the outer circumferential screw groove (21a) and the inner circumferential screw groove (22a); and a circulation part for circulating the plurality of balls (23) in the rolling path. The plurality of balls (23) includes a plurality of load balls (23a) and spacer balls (23b) disposed between adjacent load balls (23a). The load balls (23a) are made of ceramic. The spacer balls (23b) are made of stainless steel having a hardness lower than the material constituting the load balls. The diameter of the spacer balls (23b) is smaller than the diameter of the load balls (23a).

The present invention efficiently suppresses wear and tear of an adhesive of a support member supporting a substrate in a substrate treatment device. This substrate treatment device for treating a substrate comprises: a treatment chamber; and a support member disposed in the treatment chamber and having, on an upper surface thereof, a tray support surface for supporting a tray. The support member includes: an electrostatic chuck containing an electrostatic electrode for attaching to and supporting the tray; a base for supporting the electrostatic chuck; and a joining layer for joining the electrostatic chuck and the base. The support member includes a protecting means for protecting the joining layer.

The invention discloses a high-wear-resistance copper-based friction material for urban light rails and a preparation method of the high-wear-resistance copper-based friction material, and belongs to the field of metal-based friction materials. The basic composition of the friction material is Ni, Cu and V metal elements, the atomic percent of Ni is 31%-48%, the atomic percent of Cu is 27%-63%, and the atomic percent of V is 6%-24%. The preparation method comprises the following steps: melting all the components into a whole through a vacuum argon arc melting technology, uniformly annealing in a vacuum annealing furnace at 1200 DEG C for 432 hours, and quenching in water to obtain the required copper-based friction material. Compared with the prior art, the prepared copper-based friction material has the following advantages that (1) the Ni-Cu solid solution formed in the material can effectively improve the strength and plasticity of the material; (2) the V element in solid solution in the Ni-Cu matrix can refine material grains due to the existence of a pinning effect, so that the strength and the toughness of the material are further improved; and the V element can form V2O5 under the conditions of high temperature generated by friction and exposure to air, can be used as a wear-resistant phase, and can act together with a Ni-Cu matrix, so that the adhesive wear is reduced, and the wear rate is remarkably reduced. And (3) raw materials are easy to obtain, preparation is convenient, and the copper-based friction material has good application potential in the field of copper-based friction materials for urban light rails.

This invention belongs to the field of control valve technology and discloses a control valve for an aircraft bleed air precooler that resists airflow impact. It includes a controller, a guide valve body mounted on the controller, and a valve core assembly disposed inside the guide valve body. This invention achieves a sealing effect by using a valve core body with an outer diameter smaller than the inner diameter of the guide valve body and compressing the support clip. This avoids long-term metal-to-metal friction between the valve core body and the guide valve body, preventing the gradual occurrence of adhesive wear, abrasive wear, and other combined wear phenomena. Furthermore, it prevents multiple failures caused by wear exceeding the allowable tolerance range over service life. It also avoids incomplete closure due to deterioration of the geometric sealing surface tolerances, which could lead to increased internal leakage. This ensures pressure regulation accuracy, prevents chain reactions such as system pressure oscillations or control failures, improves the service life of the control valve, and guarantees system stability and safety.

This application belongs to the field of wear-resistant and anti-corrosion coating technology, specifically relating to a wear-resistant, friction-reducing, and corrosion-resistant coating, its preparation method, and its application. The wear-resistant, friction-reducing, and corrosion-resistant coating of this application comprises a support layer with gradient porosity, a composite functional layer, a metal layer, a chromium nitride layer, and a diamond-like carbon layer, sequentially stacked. The support layer with gradient porosity is in contact with the substrate, and the porosity of the support layer gradually decreases from the contact surface between the support layer and the substrate to the contact surface between the support layer and the composite functional layer. The composite functional layer comprises Cr3C2-NiCr and NiCrSiB. The beneficial effects of this application include: the wear-resistant, friction-reducing, and corrosion-resistant coating of this application can not only prevent common abrasive wear and adhesive wear, but also prevent impact fatigue wear, three-body wear, and electrochemical corrosion, and has a self-lubricating effect that reduces the coefficient of friction, significantly improving the operating performance and service life of this structure.

The invention relates to a polytetrafluoroethylene composition, a polytetrafluoroethylene composite material, a preparation method of the polytetrafluoroethylene composite material and a sealing material. The polytetrafluoroethylene composition comprises polytetrafluoroethylene, graphene and a creep resistant agent, wherein the mass ratio of the graphene to the polytetrafluoroethylene is (0.1-1): 100. According to the polytetrafluoroethylene composition, polytetrafluoroethylene is used as a matrix, graphene and a creep-resistant agent are used as fillers, and the mass ratio of graphene to polytetrafluoroethylene is controlled, so that the fillers and the matrix have better compatibility, the lamellar structure of graphene is promoted to fully play a lubricating role, and the friction coefficient of the polytetrafluoroethylene composition is effectively reduced; meanwhile, the graphene is promoted to give full play to the heat conduction effect, heat generated by friction is effectively transferred, and adhesive wear caused by friction heat is reduced, so that the wear resistance of the polytetrafluoroethylene composition is effectively improved.

According to an aspect of the disclosure a tool steel consists of, in % weight: C: 0.8 – 1.5%, Si: 1.1 – 2.3%, Cr: 6 – 10%, Mo: 0.5 - 4%, Al: 1.1 – 2.3%, Ni: 0.6 – 2.3%, and optionally one or more of Co: < 3%, Mn: < 0.8%, V: < 0.8%, Ti: < 0.3%, Nb: < 0.3%, Cu: < 0.3%, W: < 0.3%, the balance being Fe and incidental impurities.

The invention provides composite lubricating grease for metallurgical continuous casting equipment and a preparation method of the composite lubricating grease. The lubricating grease is prepared from a composite organic thickening agent matrix, a nano layered aluminosilicate sheet, macromolecular block copolymer particles and lubricating base oil, wherein the surface of the nano layered aluminosilicate sheet is grafted with a heterocyclic nitrogen-containing functional polymer chain segment. According to the invention, the synergistic effect of the polyurea thickening component and the alkaline earth metal sulfonate thickening component is combined with the enhancement effect of the functionalized nanofiller and the self-assembly structure regulation effect of the polymer block copolymer particles; the consistency stability, the wear resistance and the high-temperature oxidation resistance of the lubricating grease in high-temperature, high-load and complex friction environments are remarkably improved. When the prepared lubricating grease is used in key parts of metallurgical continuous casting equipment, the friction coefficient can be effectively reduced, the problems of adhesive wear and gluing failure are reduced, the service life of the equipment is prolonged, the maintenance cost is reduced, and the lubricating grease has remarkable technical progress and application value.

The invention discloses a sulfur nitrocarburizing process method for surface treatment of a cylinder body and a plunger, which comprises the following steps: S1, cleaning the cylinder body or the plunger to clean up oil dirt; s2, the cylinder body or the plunger is put into a preheating furnace to be preheated; s3, the cylinder body or the plunger is subjected to salt bath nitriding treatment to form a sulfur-nitrogen carbide layer; s4, the cylinder body or the plunger is subjected to salt bath oxidation treatment, so that an oxidation layer is formed on the surface of the cylinder body or the plunger; and S5, the cylinder body or the plunger is cleaned. By adopting the process method to treat the cylinder body and the plunger, the surface microstructures of the cylinder body and the plunger are more uniform and continuous, and the sulfur-nitrogen carbide layer and the nitrogen-carbon compound layer are formed on the surfaces of the cylinder body and the plunger, so that the wear resistance, the fatigue resistance, the lubricating property and the seizure resistance of the cylinder body and the plunger are remarkably improved, and the adhesive wear resistance is enhanced; the stress between the cylinder body and the plunger is more uniform, the friction coefficient of the surfaces of the cylinder body and the plunger is reduced, and the phenomenon that the cylinder body and the plunger are strained and stuck can be avoided.

The invention discloses a toothless eccentric single planet wheel driven diaphragm pump, which belongs to the technical field of diaphragm pumps, and comprises a pump body, a driving system is arranged in the pump body, the driving system comprises a driving shaft, at least one main roller and a steel ring, the main roller is sleeved on the periphery of the driving shaft, and the steel ring is sleeved on the main roller. The central axis of the main pin roller is parallel to the central axis of the driving shaft but has an eccentric distance, the steel ring is sleeved on the periphery of the main pin roller, and the inner wall surface of the steel ring is contacted with the outer cylindrical surface of the main pin roller; the elastic body acts on the periphery of the steel ring; a traditional gear, a cam or a crank connecting rod mechanism is omitted, the structure is greatly simplified, pure rolling friction transmission efficiency is high, abrasion is small, the problems of tooth surface abrasion, pitting corrosion and adhesion abrasion of a sliding friction pair in traditional meshing transmission are theoretically solved, the service life of transmission parts is prolonged, and further, the transmission mode is stable in operation, small in impact and high in reliability. And vibration and noise of the whole pump are greatly reduced.

The present invention discloses a TBM cutter wear prediction method driven jointly by mechanism and data, belonging to the field of cutter wear prediction. On the one hand, the present invention derives a cutter wear calculation formula from wear mechanisms such as abrasive wear, adhesive wear and fatigue wear between the cutter and the rock mass. On the other hand, a data model is used to model the residual part of the mechanism wear and the actual wear, and the TBM excavation parameters are also used as factors affecting the cutter wear. The prediction method of the present invention fully combines the respective advantages of the theoretical mechanism model and the data model, and can accurately predict the actual wear degree of each cutter based on TBM specification parameters and on-site engineering data. It has better generalization characteristics than pure data models and better fitting accuracy than pure mechanism models, provides assistance to on-site operators in mastering cutter information, provides data basis for timely cutter replacement, and improves the utilization rate of the cutter and the working efficiency of the tunnel boring machine.

The present invention discloses a brush cathode assisted dual electrolytic grinding device and method suitable for titanium alloy screws. The brush cathode assisted dual electrolytic grinding device includes a workpiece electrolysis module, a grinding wheel online electrolytic dressing module and an electrolyte module. The present invention uses the screw workpiece and the metal bond grinding wheel as electrolysis objects at the same time, which not only realizes the online electrolytic dressing processing of the grinding wheel, but also realizes the electrolytic grinding processing of the workpiece, thereby achieving high-precision surface quality and high grinding efficiency; and because metal removal mainly relies on electrochemical action, and the mechanical action mainly removes the anodized film without grinding the base material of the workpiece, the grinding temperature and grinding force are reduced, and the wear of the grinding wheel can be effectively reduced. At the same time, the brush can take away the grinding chips inside the spiral groove of the screw and adhered to the grinding wheel during the dual electrolytic grinding process, which also reduces the adhesive wear of the grinding wheel and improves the surface finish of the workpiece.

The invention discloses a composite coating as well as a preparation method and application thereof, and relates to the technical field of coatings. The composite coating comprises a CrN layer, an AlCrN layer, a ZrAlCrN layer, a ZrCrCN layer and a CrCN layer which are sequentially arranged in a stacked mode. And the CrCN layer is a surface layer. The obtained composite coating has the advantages of high hardness, high bonding strength, high wear resistance and high adhesive wear resistance, is good in oxidation resistance and is suitable for being used as a cutter coating, when a prepared cutter is used for cutting titanium alloy, the condition of tipping or adhesive wear is not prone to occurring, and the service life of the cutter is remarkably prolonged.

The application discloses a kind of high bonding wear-resistant glue layer compositions, its preparation raw materials include: vinyl ester resin, functional monomer, photosensitizer, diluent, polyisocyanate, its preparation method is simple, weigh vinyl ester resin, functional monomer, photosensitizer, diluent, polyisocyanate is fully mixed, namely obtained.The specific vinyl ester resin, functional monomer, composite photosensitizer, diluent, polyisocyanate are selected to be mixed so that the obtained glue layer has high bonding strength, scratch resistance and wear resistance, smaller shrinkage and aging resistance.The glue layer component is simple, curing speed is fast, efficiency is high, and the emergence of coating bottom layer curing, surface uncured problem can be avoided at the same time.In addition, process does not need organic solvent, and the pollution is small in curing process, and can be widely applied to glass, ceramic, chip, display screen, LED flexible circuit board, mobile phone screen, metal plate surface protection.