946 results about "Low friction" patented technology

A wear-resistant and low-friction coated piston ring and a preparation method therefor are provided. The OD surface diamond-like carbon coating consists sequentially of a first metal interlayer, a second metal interlayer, a gradient DLC layer, alternating high / low hardness DLC layers, and an outer running-in DLC layer. The side surface diamond-like carbon coating consists sequentially of a metal interlayer, a gradient DLC layer, and alternating high / low hardness DLC layers. The preparation method employs physical vapor deposition to sequentially deposit composite DLC coatings on the OD surface and side surface of the piston ring. The coating is a tetrahedral amorphous carbon structure, exhibiting good thickness uniformity and fine grain structure. This improves the wear resistance of the piston ring's OD surface and side surface, reduces the aggressiveness of the piston ring side surface against the piston ring groove, and meanwhile avoids adhesion.

According to the composite protective coating for the bolt surface, the preparation method and the application, the composite coating takes a bolt of a common model of an iron tower as a substrate, and a cathode arc ion plating technology and a magnetron sputtering technology are combined; the preparation method comprises the four main steps of substrate surface pretreatment, metal bonding layer preparation, metal nitride bearing layer preparation and surface molybdenum disulfide solid self-lubricating layer preparation. According to the method, reliable preparation of the composite coating on the complex thread surface of the bolt is achieved, the anti-loosening capacity of the bolt is remarkably improved through the low friction coefficient, good bearing capacity and excellent wear resistance, and meanwhile the composite coating further has good corrosion resistance and has wide application prospects in iron towers for communication, electric power and the like.

The present invention relates to a slide system (1) comprising a first slide member (10) having a slide surface (14) at least partly coated with a lipophilic composition coating (18) to provide a slide layer (19) with lowered friction, and a second slide member (20) arranged in sliding contact with the slide layer (19) at an interface to provide a slide system (1). The interface between the slide layer (19) and the second slide member (20) forms a plain bearing to allow for sliding movement of the second slide member (20) relative to the first slide member (10). At least the slide surface (14) of the first slide member (10) is made of a first plastic, and at least a part of said second slide member (20) being in sliding contact with the slide layer (19) is made of a second plastic. The first and the second plastics are different plastics. The invention further relates to a method for providing said slide system (1).

The invention discloses a flexible pressure sensor with a multistage hemispherical structure and a preparation method thereof, the sensor comprises an electrode layer, and an upper friction layer, a separation layer and a lower friction layer which are sequentially arranged below the electrode layer from top to bottom, the separation layer is used for providing a space for full contact and separation of the upper friction layer and the lower friction layer, and the separation layer is used for providing a space for full contact and separation of the upper friction layer and the lower friction layer. And the lower friction layer is formed by a multi-stage hemispherical structure constructed on the surface of a flexible film. The sensor has the remarkable effects that benefited from the characteristics of a triboelectric sensing mechanism, the sensor has the advantages of self power supply, stable output and simple structure, and meanwhile, the upper friction layer and the lower friction layer of the sensor are in step-by-step contact under the action of pressure through the surface microstructure of the lower friction layer of the multi-stage hemispherical structure; the compressibility is enhanced, and the contact and separation process of the sensor is optimized, so that the sensitivity of the sensor is improved.

An absorbent repositioning pad includes an upper layer including a liquid permeable material, and a lower layer having relatively lower friction surface than the upper layer. The absorbent repositioning pad further includes a first intermediate layer between the upper and lower layers and including an absorbent material, and a second intermediate layer between the first intermediate layer and the lower layer and including a liquid impermeable material.

The invention provides an antifriction wear-resistant Zr / ZrN / ZrCuN composite coating as well as a preparation method and application thereof, and relates to the technical field of surface coating materials. The invention provides an antifriction wear-resistant Zr / ZrN / ZrCuN composite coating which comprises a Zr bonding layer, a ZrN supporting layer, a ZrN transition layer and a ZrCuN composite layer which are sequentially stacked, and the ZrCuN composite layer comprises a ZrN ceramic phase and doped Cu. The Zr / ZrN / ZrCuN composite coating provided by the invention has the advantages of high plastic deformation resistance, low friction coefficient, high wear resistance, good film-substrate binding force and excellent comprehensive performance, can prolong the service life and improve the functions of medical metal materials such as titanium alloy and the like, and is completely suitable for the surface protection requirements of medical apparatuses and instruments, tools and molds and mechanical parts.

An anti-ligature door handle is disclosed. The door handle assembly includes a handle, an escutcheon, and a PTFE coating. The door handle assembly is constructed in a manner where a cord or rope cannot readily be anchored to any surface. This is due to the sloping geometry of the door handle assembly along with the low friction coating. The low friction coating may be a sintered and skived sheet of PTFE or a sprayed layer of PTFE that ensures sufficient strength, resilience, and friction properties when applied.

The invention relates to a polyurethane resin-based water-lubricated bearing composite material. The water-lubricated bearing composite material is prepared by mixing a nano functional filler, a solid lubricant, a polyurethane matrix and a polyurethane curing agent, the nano functional filler is any one of attapulgite powder or derivatives thereof; the mass part ratio of the nano functional filler to the solid lubricant to the polyurethane matrix is (5-20): (5-20): (70-85); and the polyurethane curing agent accounts for 20-35% of the mass content of the polyurethane matrix. Meanwhile, the invention further discloses a preparation method of the water-lubricated bearing composite material. The obtained composite material supports dry start and water-free and water-shortage working condition operation of equipment through the self-lubricating characteristic of the material, the friction and wear performance of the polyurethane composite material can be remarkably improved, the reliability of a moving component can be greatly improved, the service life of the moving component can be greatly prolonged, friction energy consumption is reduced, and the composite material has remarkable green and environment-friendly significance.

The invention discloses a three-coordinate measuring machine re-measurement system and a control method, and belongs to the technical field of three-coordinate measurement, the three-coordinate measuring machine re-measurement system comprises a support, a workbench, a portal frame, a detection system, a first electric telescopic rod, a second electric telescopic rod, a third electric telescopic rod, a sliding rail, an adjusting column and a gradienter, and further comprises a main control module and a control logic module, the control logic module controls the three-coordinate measuring machine to execute a measuring task through electric connection, ceramic shells are arranged on the surfaces of the portal frame, the connecting frame, the sliding clamping block and the sliding rail, and the characteristics of high rigidity and low expansion coefficient of ceramic materials are utilized, so that deformation of a traditional metal structure caused by temperature change or long-term friction is avoided. Friction loss is reduced while the contact area is reduced, and the track precision when the portal frame translates along the X axis is ensured. The rigid support of the ceramic shell enables the equipment not to depend on a strict constant temperature environment, eliminates a thermal deformation error source from the mechanical structure level, and improves the measurement stability in a complex environment.

The invention relates to the field of screw forming, and discloses a screw cold heading forming process which is characterized by comprising the following steps: step 1, wire preparation and surface pretreatment: based on the requirement of screw forming on the surface quality of raw materials, a metal wire is treated by adopting a mechanical wiredrawing and chemical phosphating and saponifying composite process, and the surface of the metal wire is treated; surface oxide skin is removed, a lubricating film layer is formed, and the forming flowability and the service life of the die in the subsequent cold heading process are effectively improved. A raw material is subjected to spheroidizing annealing treatment in a continuous spheroidizing annealing furnace, internal pearlite is converted into spherical cementite, the ductility and deformation uniformity of the material are improved, then a continuous wire drawing machine is adopted for multi-stage drawing diameter reduction, a three-stage chemical phosphating-saponification treatment process is matched, a low-friction and high-adhesion lubricating film layer is formed, and the service life of the lubricating film layer is prolonged. And a stable material basis and a lubricating environment are provided for the subsequent cold heading process, so that the problems that the friction resistance generated in the forming process of a screw material is large, and a mold is quickly worn are solved.

A cover for a support surface includes: a ticking made of a ticking material configured to enclose a support layer of the support surface, the ticking having an outer top surface configured to face a person lying on the support surface; and a friction reducing overlay on at least a portion of the outer top surface for facilitating displacement of the person on the support surface, the friction reducing overlay being made of a low friction material formed onto the ticking material, the friction reducing overlay comprising a plurality of overlay elements that are spaced apart from each other to form an overlay pattern.

An internal floating piston (IFP) having circumferential seal groove 2 on its external surface between two walls 3, 4 of the external surface, and an anti-tipping feature 8 increasing a length of said

The invention provides a gradient self-repairing sealing coating and a preparation method thereof, and relates to a high-temperature protection material. The gradient self-repairing sealing coating comprises a bonding layer, a gradient middle layer, a transition layer and an abradable surface layer which are sequentially arranged from a base body to the surface. A bonding layer in the gradient self-repairing sealing coating contains silicate, so that the bonding strength and the heat-resistant stability of a matrix are improved; rare earth silicate and Ir elements are introduced into the gradient intermediate layer, so that high-temperature corrosion resistance is enhanced, and thermal stress is relieved; the transition layer contains zirconium oxide and graphene and has the functions of thermal isolation and stress regulation; the abradable surface layer is formed by combining rare earth silicate and graphite, low friction and preferential abrasion are achieved, and effective sacrifice protection is provided. The overall structure can have multiple properties of heat, corrosion resistance and abrasion resistance, and is suitable for the surface protection requirement under the complex hot end working condition.

The present invention pertains to a wear pad for a telescopic boom of a work machine, comprising a base part configured to be fixedly mounted to the telescopic boom, and a top layer part configured to provide a wear-resistant, low friction sliding surface. The top layer part is configured to be releasably mounted to the base part. The invention further pertains to a telescopic boom assembly for a work machine, comprising a first boom segment having at least one first wear pad assembly mounted to a free end of the first boom segment, and a second boom segment having at least one second wear pad assembly mounted to a sliding end of the second boom segment, wherein at least one of the wear pad assemblies comprise a wear pad having a base part and a top layer part configured to provide a wear-resistant, low friction sliding surface. The top layer part is configured to be releasably mounted to the base part. Further, the present invention pertains to a work machine comprising such telescopic boom assembly.

The invention relates to the field of wear-resistant materials, and provides a thermoplastic wear-resistant composite material as well as a preparation method and application thereof, and the thermoplastic wear-resistant composite material comprises the following raw materials in parts by weight: 65-75 parts of polytetrafluoroethylene, 25-35 parts of polyphenylene sulfide, 3-7 parts of modified aramid fiber and 1-5 parts of modified molybdenum disulfide. The thermoplastic wear-resistant composite material provided by the invention has the characteristics of good wear resistance, low friction and high toughness, and can be widely applied to wear-resistant parts related to pump bodies and bearings.

The invention discloses a DLC coating with a gradient composite structure and a surface microstructure and a preparation method of the DLC coating, and belongs to the technical field of hard alloy tool surface treatment. The coating comprises a transition layer, a DLC gradient layer and a laser microstructure layer arranged on the outer surface of a DLC main coating, the transition layer is composed of Cr layers and CrN layers which are alternately stacked; the sp3 bond content of the DLC gradient layer is gradually increased in the direction from the transition layer to the outer surface of the DLC gradient layer, and the W element content in the DLC gradient layer is gradually decreased in the direction from the transition layer to the outer surface of the DLC gradient layer; the laser micro-texture layer is composed of a hexagonal honeycomb-shaped densely-arranged pit array. The coating system has the characteristics of high interface bonding strength and ultralow friction, and the service life of the hard alloy cutter can be remarkably prolonged when the coating system is applied to the surface of the hard alloy cutter.

A motion simulator system is disclosed that includes a freely rotatable movable frame supported by, but unattached to, a hemispherical base. The movable frame comprises a spherical enclosure constructed from rigid, lightweight materials such as composite materials or interlocking panels, providing unlimited 360-degree rotation in all three rotational degrees of freedom (pitch, roll, and yaw). An internal actuator system coupled to the movable frame controls attitude positioning while the center of rotation remains substantially fixed relative to the base. Low friction engagement between the movable frame and base is achieved through transfer bearings integrated into the base's outer surface or by pressure-vented air cushions. The system enables smooth, continuous rotation of the untethered movable frame for enhanced motion simulation applications.

The invention provides a low-heat-generation self-lubricating oil seal rubber material and a preparation method thereof. The rubber material comprises the following components in parts by weight: 100 parts of main rubber, 3-6 parts of zinc oxide, 1-3 parts of an anti-aging agent, 1-3 parts of solid marone indene resin, 3-8 parts of a self-repairing lubricant, 5-25 parts of a reinforcing agent, 70-100 parts of diatomite, 5-15 parts of a plasticizer, 1-5 parts of tetrafluoroethylene, 1-3 parts of stearic acid, 1-3 parts of a flow promoter, 0.2-0.5 part of sulfur and 1-2 parts of an accelerant. The nano silicon dioxide-ionic liquid composite material is added into the oil seal rubber material as a self-repairing lubricant, and the ionic liquid of the composite material can form a lubricating film on a friction interface, so that the friction coefficient is reduced, the self-lubricating effect is realized, and the dynamic temperature rise is reduced; in addition, the ionic liquid can also cover a damaged area and repair microscopic cracks; meanwhile, after the self-repairing lubricant is dispersed, a heat conduction network can be formed, and heat generation is reduced.

The invention discloses application of a composite film with a multi-element and multi-phase structure in surface lubrication of an aerospace vehicle or a nuclear power bearing in a high-temperature environment. The composite film comprises a titanium transition layer, a titanium / molybdenum disulfide / tantalum / tungsten diboride gradient transition layer and a multi-element and multi-phase structure layer which are sequentially formed on the surface of a base body. The multicomponent multiphase structure layer comprises a molybdenum disulfide / tantalum / tungsten diboride composite layer, the molybdenum disulfide / tantalum / tungsten diboride composite layer comprises tantalum nanoparticles, a molybdenum disulfide layer and a tungsten diboride layer, and the tantalum nanoparticles are distributed between the molybdenum disulfide layer and the tungsten diboride layer. The composite film with the multi-element and multi-phase structure shows higher hardness and hardness / elasticity ratio and low friction coefficient and wear rate at the high temperature of 400 DEG C, and meanwhile, the composite film can meet stable lubrication and long-life reliable service of aerospace vehicles and nuclear power bearings under harsh and complex variable working conditions.

The invention relates to the technical field of coated cutting tools, and provides a chemical vapor deposition hafnium boride multilayer coated cutting tool and a preparation method thereof.The chemical vapor deposition hafnium boride multilayer coated cutting tool comprises a base body and multiple coatings sequentially arranged on the surface of the base body; the multi-layer coating comprises a first sub-coating HfBN layer and a second sub-coating HfBx layer, and x is larger than or equal to 1.8 and smaller than or equal to 2.2; the first sub-coating HfBN layer is composed of HfB2, HfN and a BN phase, the volume fraction of the HfB2 phase is 60-90%, and the first sub-coating HfBN layer grows in a columnar crystal mode; the second sub-coating HfBx layer grows in a columnar crystal mode, and the grain size of the second sub-coating HfBx layer is larger than that of the first sub-coating HfBN layer. The high-wear-resistance and low-friction-coefficient cutting fluid has high wear resistance, high bonding strength, high adhesion resistance and low friction coefficient, so that the cutting machining requirements of difficult-to-machine materials such as stainless steel, titanium alloy and nickel-based high-temperature alloy are met.

The utility model relates to the field of pipes, and discloses an anti-blocking composite polyethylene pipe which comprises a composite pipe structure, the composite pipe structure comprises a polyethylene pipe base layer, a smooth anti-blocking layer, spiral guide lines, a heat preservation layer, a heat insulation layer and a wear-resistant layer, the smooth anti-blocking layer is adhered to the inner side of the polyethylene pipe base layer, and the spiral guide lines are arranged on the outer side of the polyethylene pipe base layer. According to the anti-blocking polyethylene pipe, due to the fact that the smooth anti-blocking layer and the spiral guide lines are arranged, polytetrafluoroethylene materials in the smooth anti-blocking layer have extremely low friction coefficients, friction between fluid and the pipe wall can be reduced, and the anti-blocking polyethylene pipe has the advantages that the anti-blocking polyethylene pipe is good in anti-blocking performance, good in anti-blocking performance, good in anti-blocking performance, good in anti-blocking performance, good in anti-blocking performance and good in anti-blocking performance. And on the other hand, the spiral guide lines located on the inner side of the smooth anti-blocking layer increase the turbulence degree of fluid in the pipe, deposition of the particulate matter can be broken easily, the particulate matter can move along with the fluid, sediment can be taken away easily, and pipe blockage is prevented.

The invention discloses a suture line and a preparation method thereof, and relates to the technical field of medical materials, the suture line comprises a suture line core material and hydrogel modified on the surface of the suture line core material; the suture line core material is prepared from the following components in parts by mass: 1 to 1000 parts of piezoelectric material and 1 to 1000 parts of magnetostrictive filler. The suture line provided by the invention is adaptive to tissue modulus and low in friction, keeps basic characteristics of a piezoelectric material, also has good magnetic field response electrical stimulation capability, has a non-invasive electrical stimulation characteristic with controllable response strength, and can generate electrical stimulation under induction of a wireless magnetic field, so that migration and proliferation of cells are promoted; the wound healing is promoted. In addition, due to the fact that the suture line is low in friction, further friction damage to the wound is basically avoided when the suture line is removed, and wide application prospects are achieved.

The application belongs to the technical field of surface modification, and discloses a method for constructing a ceramic-based self-lubricating, high-wear-resistant and strong-corrosion-resistant coating based on thermal spraying technology and application. The method uses a thermal sprayed ceramic coating as a template, introduces a solid-liquid reversible lubricating phase, and after being heated and melted, the solid-liquid reversible lubricating phase is penetrated into inherent pores and micro / nano cracks in the ceramic coating through a vacuum impregnation process, and is solidified and retained in the defects after cooling, so that a new ceramic-based self-lubricating and strong-corrosion-resistant composite coating is finally obtained. The preparation method is simple, fast and efficient, and does not affect the mechanical properties of the ceramic coating, and the ceramic-based self-lubricating and strong-corrosion-resistant composite coating has low friction coefficient and excellent wear resistance and corrosion resistance.

The invention discloses a strong-combination wide-temperature-range wear-resistant composite coating, and relates to the technical field of solid lubricating materials, the composite coating comprises a transition layer, a functional inner layer, a diffusion barrier layer and a functional outer layer which are sequentially formed on the surface of a matrix, the transition layer is a Mo layer and a Mo2N layer, the functional inner layer is a MoAgN layer, the diffusion barrier layer is a Mo2N layer, the functional outer layer is a MoAgN layer, and the functional inner layer is a MoAgN layer. The functional outer layer is a MoAgN layer, and the MoAgN layer comprises a Mo2N phase and an Ag phase. The invention further discloses a preparation method of the composite coating and application of the composite coating in the field of solid lubrication protection. The composite coating is good in film-substrate binding force and low in friction coefficient and wear rate in a wide temperature range, damage to key mechanical parts in the air foil bearing caused by high-temperature lubrication failure can be avoided, and the tribological performance of the bearing parts under the working condition of the wide temperature range is improved.

The invention discloses an electroplated part, an electroplated part manufacturing method and a connector. The electroplated part comprises a base material; a nickel plating layer formed on the surface of the base material; the tin-graphite composite plating layer is formed on the nickel plating layer; the nickel plating layer is formed on the base material, the tin-graphite composite plating layer is formed on the nickel plating layer, the tin plating layer is formed on the tin-graphite composite plating layer, the nickel plating layer serves as a bottom plating layer of the base material, the tin plating layer serves as an outer plating layer of the base material, and the tin-graphite composite plating layer serves as a middle plating layer of the base material. According to the invention, the graphite particles exposed from the tin-graphite composite coating are partially or completely wrapped by the outermost tin coating, so that the graphite particles are not easy to fall off, the wear resistance and corrosion resistance of the electroplated part are improved, and the service life of the electroplated part is prolonged. In addition, the plating layer structure also has a relatively low friction coefficient, so that the insertion and extraction force of the electroplated part in the use process can be greatly reduced.

A combined extrusion method for preparing high-performance grain-refined magnesium alloy comprises the following steps that a mold is cleaned, and a molybdenum disulfide solid lubricant is evenly sprayed to an extrusion channel to reduce friction force; the tightening mold is tightly wrapped with refractory cotton after being placed at a proper extrusion position of a workbench; induction heating plates are placed on the two sides of the mold, a thermocouple is placed in an extrusion channel for temperature measurement, and heat preservation is conducted for 30 min after heating is conducted to the experimental temperature; polishing the sample to remove an oxide layer, and then uniformly spraying a MoS2 solid lubricant; putting into a muffle furnace, heating to 300-350 DEG C along with the furnace, and preserving heat for 15 minutes; coordinating the heat preservation time of the sample and the mold; after the heat preservation time is finished, the heating and temperature measuring equipment is moved away, and the sample is put into an extrusion channel and extruded at the speed of 2-4 mm / s; after extrusion is finished, the sample and the mold are air-cooled together at the original position of a workbench; after cooling to room temperature, opening the mold and taking out the sample. The tensile strength, the ductility and the product of strength and elongation of the sample extruded by the method are 298.02 MPa, 23.42% and 6.98 GPa% respectively, and the performance of the magnesium alloy is greatly enhanced.

The invention provides a corrosion-resistant and low-friction CoCrNiTiC medium-entropy alloy carbide film and a preparation method thereof. The alloy comprises Co, Cr, Ni, Ti and C. The formula of the alloy comprises Co, Cr, Ni, Ti and C. A CoCrNiTiC entropy alloy carbide film is prepared on a substrate and a monocrystalline silicon wafer (100) by adopting planar radio frequency magnetron sputtering, a CoCrNi alloy target, a Ti target and a graphite target are selected as target materials, the gas introduced in the sputtering process is Ar gas with the purity of 99.99%, the working pressure is 1.0 Pa, and the deposition time is 2 hours. According to the method, the CoCrNiTiC high-entropy alloy carbide film is prepared through planar target magnetron sputtering, the thickness of the medium-entropy alloy carbide film ranges from 600 nm to 800 nm, and an SEM shows that the surface of the film is uniform and flat and has no obvious defects. Along with the increase of the carbon content, the friction coefficient of the film is gradually reduced, the corrosion resistance is enhanced, and the toughness is improved.

The present invention provides an adaptive radial-thrust integrated bearing suitable for high-speed and heavy-load conditions, comprising a bearing body, a thrust fixed pad and a radial tilting pad, wherein the bearing body comprises a radial part and a thrust part; the thrust fixed pad is fixedly installed at one end of the thrust part along the circumferential direction, and the radial tilting pad is arranged inside the radial part along the circumferential direction; a cavity structure is arranged on one side of the thrust fixed pad for forming a friction pair, for forming an oil film, and the radial tilting pad comprises a load-bearing radial tilting pad and an unload-bearing radial tilting pad, and micro-textures are distributed on the load-bearing radial tilting pad. The radial part pad of the present invention is provided with micro-textures at the load-bearing part, which can effectively reduce the contact area between the friction pairs, thereby reducing contact deformation and local pressure concentration, and further reducing the friction coefficient; the thrust part pad is provided with a cavity structure, which can greatly reduce the lubricating oil temperature between the friction pairs, ensure the fluid viscosity, and greatly improve the axial load-bearing capacity and anti-eccentric load performance of the bearing.

The present invention discloses a high temperature wear-resistant self-lubricating boron-doped diamond-like coating and its preparation method and application, belonging to the technical field of coating materials. The boron-doped diamond-like coating comprises a Cr base layer deposited on the surface of a substrate, a Cr x B y C z Gradient transition layer and B-DLC functional layer; Cr base layer thickness is 0.15μm~0.25μm, Cr mass percentage is 99.5%~99.99%; Cr x B y C z The gradient transition layer has a thickness of 0.05μm to 0.10μm, a Cr mass percentage greater than 0 and ≤ 99.99%, and a B mass percentage greater than 0 and ≤ 8%. The B-DLC functional layer has a thickness of 0.8μm to 2.0μm, and a B mass percentage of 3% to 5%. This boron-doped diamond-like coating combines high hardness, high toughness, and low friction, exhibiting excellent self-lubrication and wear resistance in high-temperature atmospheric environments of 400-500°C.

The invention discloses a black phosphorus-based composite material as well as a preparation method and application thereof, and relates to the technical field of black phosphorus materials. The black phosphorus-based composite material is prepared from the following raw materials: black phosphorus, nano ferroferric oxide and dopamine hydrochloride. The dopamine hydrochloride is subjected to in-situ polymerization to form polydopamine. The obtained black phosphorus-based composite material has a low friction coefficient and an excellent lubricating effect, can be used for preparing a lubricant, for example, as a lubricating additive in lubricating oil or lubricating grease, effectively improves the friction performance of the lubricant, improves the lubricating effect of the lubricant, and is suitable for lubrication of mechanical parts.