83results about How to "Good self-lubricating performance" patented technology

The invention provides a glass fiber reinforced nylon composite material and a preparation method thereof, and belongs to the technical field of high polymer materials, the glass fiber reinforced nylon composite material comprises the following components by weight: 75-82 parts of nylon 6, 14-16 parts of modified glass fiber, 2-3 parts of polyethylene glycol, 0.4-0.7 part of an antioxidant, 0.6-1 part of a lubricant and 0.6-1 part of an antistatic agent; the modified glass fibers are prepared by treating glass fibers with a silane coupling agent and then treating the glass fibers with a dopamine-boron nitride surface modifier. The excellent tensile strength of the prepared composite material is guaranteed, and meanwhile, the reduction of the elongation at break is effectively avoided, so that the fatigue resistance of the composite material is guaranteed, and the service life is further prolonged.

The invention relates to the technical field of epoxy resin coatings, and discloses an inorganic composite nano anticorrosive coating material and a preparation method thereof. The inorganic composite nano anticorrosive coating material comprises a component A, a component B and a component C, wherein the component C is obtained by mixing a functional modified inorganic composite nano material and aluminum sorbate; the component A is obtained by mixing modified epoxy resin, a defoaming agent and an anti-settling agent, and the component B comprises a polyamide curing agent. The inorganic composite nano anticorrosive coating material disclosed by the invention has excellent toughness, wear resistance, corrosion resistance, antibacterial and antifouling properties and ultraviolet resistance.

The invention belongs to the technical field of polyester resin, and particularly relates to polyester resin with high impact resistance and super weather resistance and a preparation process of the polyester resin. The polyester resin is prepared from the following components in parts by weight: 30 to 40 parts of polyol, 40 to 55 parts of binary acid and / or anhydride, 15 to 25 parts of amino resin, 8 to 12 parts of acrylic polyol resin, 5 to 20 parts of acidolysis agent, 1 to 5 parts of polyamide, 0.1 to 0.5 part of esterification catalyst, 10 to 20 parts of modified filler, 2 to 4 parts of curing accelerator and 0.1 to 1.5 parts of antioxidant. According to the invention, polyamide is added to modify the resin, and is compounded with amino resin and acrylic polyol resin, so that the polyester resin of the high-impact super-weather-resistant powder coating is designed and prepared, impact resistance and a leveling effect can be considered, and the coating prepared from the polyester resin has good wear resistance and outstanding super weather resistance at the same time.

The invention relates to the technical field of coated cutters, and provides a cutting tool with a high-hardness self-lubricating coating and a preparation method of the cutting tool. The cutting tool comprises a tool base body and the coating formed on the tool base body; the coating is of a multi-layer structure and sequentially comprises a first sub-coating, a first gradient layer, a second sub-coating, a second gradient layer and a third sub-coating from inside to outside. The content of Si in the first gradient layer is increased in a gradient mode from inside to outside and is not higher than the content of Si in the second sub-coating; the content of B in the second gradient layer is increased in a gradient mode from inside to outside and is not higher than the content of B in the third sub-coating.

The invention belongs to the technical field of plastic alloy materials, and particularly relates to a multifunctional PA6 / ASA alloy material and a preparation method thereof.The preparation method comprises the steps that a proper biomass-based porous silicon carbon material is selected for treatment; weighing the PA resin, the AS resin and the compatilizer, putting into a stirring pot, and uniformly stirring; adding a wetting agent into the stirring pot, and uniformly stirring; adding a processing aid, toughened acrylic rubber powder and the treated biomass-based porous silicon carbon material into a stirring pot, uniformly stirring at a high speed, and adding the mixed material into a main feeding weightlessness scale; and setting the blanking amount of the weightlessness scale to be 30Kg / h, setting the rotating speed of a screw rod to be 420r / min, starting auxiliary equipment, and carrying out granulation production. The method is superior to a method for filling the PA6 / ASA material with inorganic minerals in special microcosmic shapes and adding a large number of functional auxiliaries, and light weight, noise reduction, low shrinkage, wear resistance, highlight, weather resistance and high temperature resistance can be achieved in the state that a single filler is added.

The invention discloses an oilless bearing surface wear-resistant self-lubricating hydrogen-free carbon-based coating and a preparation method thereof, the oilless bearing surface wear-resistant self-lubricating hydrogen-free carbon-based coating comprises a binding force layer, a wear-resistant self-lubricating coating and a surface C layer, and the binding force layer, the wear-resistant self-lubricating coating and the surface C layer are sequentially arranged on the surface of an oilless bearing from bottom to top through magnetron sputtering. The C target material is used as a carbon source, so that the use of flammable and explosive gases such as methane and acetylene is avoided, the safety of the process is guaranteed, the risks of subsequent hydrogen embrittlement cracking and the like of the coating are reduced, and the service life of the coating is prolonged; by arranging the surface C layer, the self-lubricating performance of the coating is further improved, the friction force among all parts of the oilless bearing is reduced, and the service life of the oilless bearing is prolonged; meanwhile, oxygen plasma treatment is carried out before the surface C layer is deposited, so that the bonding strength between the surface C layer and the wear-resistant self-lubricating coating is improved, and the service life of the coating is prolonged.

The invention belongs to the technical field of sealing, and particularly relates to a combined sealing piece, a manufacturing method thereof and a sealing structure. The combined sealing piece comprises a first supporting ring, a second supporting ring, a first graphite ring, a second graphite ring and an alloy ring. The first graphite ring and the second graphite ring are constructed to be capable of conducting sealing operation on the first sealing face and the second sealing face correspondingly, and the alloy ring is constructed to be capable of being melted in response to temperature rising, so that radial acting force on the first graphite ring and the second graphite ring is generated under axial extrusion of the first supporting ring and the second supporting ring; therefore, the sealing effect on the first sealing surface and the second sealing surface is enhanced. According to the combined sealing element, the related requirements for sealing in the high-temperature and high-pressure environment can be met, the combined sealing element can be further suitable for low-speed dynamic sealing occasions, and the combined sealing element has good application prospects in the technical field.

The invention provides a method for regulating and controlling the friction coefficient of a carbon-based thin film through friction-induced sliding interface reconstruction, and belongs to the technical field of carbon-based thin film materials. The preparation method comprises the following steps: firstly, depositing a transition metal intermediate layer on the surface of a pretreated substrate as a bonding layer, respectively taking carbon and transition metal carbide as sputtering targets, adjusting the condition of second sputtering to obtain a carbon-based film containing transition metal carbide nanocrystals with different sizes, and then performing friction treatment to obtain the carbon-based film containing the transition metal carbide nanocrystals with different sizes. The transition metal carbide nanocrystals are excited to be subjected to an oxidation reaction to form oxidation products, meanwhile, the oxidation products are driven to be screened and migrated, a transition metal oxide transfer film is spontaneously constructed, and the sliding interface with the low shearing force and weak adhesion characteristics is constructed; therefore, the friction coefficient of the carbon-based thin film is regulated and controlled through friction-induced sliding interface reconstruction.

The invention discloses a dermatoglyph knurling roller and a processing technology thereof, and relates to the technical field of knurling rollers, in order to improve the wear resistance and corrosion resistance of the surface of the knurling roller, on the basis of a steel roller, the surface of the steel roller is coated with an anti-corrosion and wear-resistant metal powder coating through laser cladding, and a nano graphene material with a self-lubricating property is added into the steel roller, so that the anti-corrosion and wear-resistant metal powder coating is formed. After titanium dioxide is loaded on the surface of a nano graphene material and reduced, nano titanium metal particles are loaded on the surface of nano graphene, so that the bonding strength between the nano graphene and alloy powder after laser melting is improved, and the stripping phenomenon of a coating in the subsequent pressing process is avoided; therefore, on the basis of ensuring the overall strength of the steel roller, the wear resistance and corrosion resistance of the surface of the steel roller are improved, and the service life of the coating is effectively prolonged.

The invention belongs to the field of medical rubber materials, and particularly relates to a vulcanization preparation process of a medical puncture-resistant rubber gasket. A vulcanization preparation process of a medical puncture-resistant rubber gasket comprises the following steps: S1, raw rubber raw material preparation: crushing and mixing raw rubber raw materials to be vulcanized into raw rubber powder, removing impurities, and sieving; the raw rubber raw materials comprise halogenated butyl rubber, polyisoprene rubber and epichlorohydrin rubber; s2, preparing a rubber compound; the preparation method comprises the following steps: preheating an internal mixer to 80-100 DEG C, adding 80-90 parts by weight of raw rubber powder into the internal mixer, and refining at 115-125 DEG C for 5-9 minutes; adding 12-22 parts by weight of a modified composite filler, 2-6 parts by weight of zinc oxide, 1-3 parts by weight of stearic acid, 3-8 parts by weight of a crosslinking auxiliary agent and 0.5-1.2 parts by weight of an anti-aging agent, and mixing for 18-22 min; s3, calendaring and sheet discharging: calendaring and molding the rubber compound obtained in the step (2) to obtain a rubber compound sheet; s4, prevulcanization: putting the rubber compound sheet calendered in the step (3) into a mold cavity of a press vulcanizer, and carrying out under-vulcanization production to obtain a preformed sheet; the preformed rubber sheet in the step (4) and an organic solvent are subjected to cleaning treatment and drying and then put into a vulcanization mold to be subjected to vulcanization forming, the rubber gasket is obtained, the vulcanization temperature ranges from 140 DEG C to 150 DEG C, and the vulcanization time ranges from 3 min to 7 min. In order to solve the problem that the use performance of a medical rubber gasket is affected due to the fact that the medical rubber gasket is needled to fall scraps and is poor in rebound resilience, the invention provides the vulcanization preparation process of the medical needling-resistant rubber gasket.

The invention provides a built-in permanent magnet synchronous motorized spindle optimization design method for a high-precision numerical control machine tool, and aims to solve the problem that a conventional motorized spindle structure cannot adjust an axial preload and a radial external load in real time. The structure of the motorized spindle is optimally designed from three aspects of high-speed ceramic ball mixed bearing materials, axial preload real-time compensation and radial external load real-time compensation. The dynamic characteristics of the rotor system can be improved, and shafting vibration can be actively inhibited.

The invention relates to the technical field of tobacco production, in particular to food-grade modified silica gel for tobacco production equipment, application of the food-grade modified silica gel and the tobacco production equipment. The modified silica gel comprises a silica gel raw material and further comprises the following components in percentage by mass: 0.5%-0.8% of a silane coupling agent, 1%-2% of a cross-linking agent, 2%-5% of molybdenum disulfide, 7%-12% of flame-retardant fibers, 5%-15% of a toughening agent, 5%-12% of an anti-sticking agent and 3%-8% of a wear-resistant agent, and the wear-resistant agent is micron-sized wear-resistant powder. A sealing device and a cleaning device of the tobacco production equipment are prepared from the modified silica gel. The modified silica gel has good mechanical property and flame retardance, food-grade safety, long service life and good effect, and cigarettes produced by the equipment can keep good quality.

The fine adjustment type support equipment comprises a top installation plate, a guide connection device is installed at the upper end of the top installation plate, bearing plates are symmetrically installed below the top installation plate, and a left guide block and a right guide block are installed on the outer sides of the bearing plates through guide devices respectively. A left-right fine adjustment device is mounted on the left guide block, and an up-down fine adjustment device is mounted on the right guide block; and the front sides of the left-right fine adjustment device and the up-down fine adjustment device are connected with a mounting base. Therefore, through mutual cooperation of the left-right fine adjustment device and the up-down fine adjustment device, a two-dimensional fine adjustment scheme can be formed, and the mounting and positioning precision of the clamping jaw device is remarkably improved. The sliding rail and the sliding block have a good self-lubricating effect on the premise that the stable combination degree is met. The stop raised head is matched with the elastic buffer rod, redundant impact kinetic energy can be absorbed at the limiting position, impact resonance is avoided, and use noise is reduced.

The invention relates to a production method of a wear-resistant high-frequency sieve, belongs to the technical field of wear-resistant high-frequency sieves, and discloses the production method of the wear-resistant high-frequency sieve, which comprises the following steps of: cutting, punching, rolling and welding a steel wire into a sieve plate framework; the preparation method comprises the following steps: carrying out chain extension on a prepolymer containing polytetrafluoroethylene micro powder, which is prepared by taking polycaprolactone diol and diphenylmethane diisocyanate as raw materials, through a DMTDA (Dimethylthio-toluenediamine) chain extender, putting the prepolymer into a sieve plate framework in a pouring mold at 115-120 DEG C, and carrying out normal-pressure pouring, curing and post-curing, so as to obtain the polyurethane pouring sieve plate with high abrasive resistance. The high-frequency sieve plate grinding strip has good elasticity and weather resistance and excellent tear resistance and wear resistance, the sieve plate grinding strip of the high-frequency sieve can be replaced every 24-30 months after being manufactured, the service life is longer, and the maintenance cost is lower. By adding the polytetrafluoroethylene micro powder, the high-frequency screen has good wear resistance and certain self-lubricating performance, and the wear resistance of the high-frequency screen is improved.

The present invention relates to a catheter specially used for aspirating thrombus at the distal end of cerebral blood vessels, which is composed of a catheter seat, a stress release tube and a tube body. The main part of the tube body is composed of three layers, namely, an inner layer, a braided layer and an outer layer. The outer layer material is designed in sections, which is designed according to the physiological and anatomical structure of cerebral blood vessels and provides corresponding flexibility according to different sections of blood vessels. The catheter is mainly made of one or more of nylon 12, PEBAX and TPU polyester materials which cooperate with each other. The outer layer material of the catheter of the present invention is segmented according to the physiological and anatomical structure of cerebral blood vessels and provides corresponding flexibility and pushing performance according to different sections of blood vessels, so that the catheter can effectively adapt to the blood vessel structure and facilitate the catheter to reach the lesion position.

The application relates to the technical field of automobile part molds, and discloses an automobile part mold guide column, which comprises a lower mold and an upper mold, wherein the upper mold is located above the lower mold. The automobile part mold guide column is provided with a soft sleeve outside the ball guide column, can play a buffering and isolating role when the mold and the ball guide column relatively move, and the soft sleeve made of polytetrafluoroethylene has very low friction coefficient and good self-lubricating property. When the guide hole of the mold is in contact with the ball guide column and relatively slides, the soft sleeve first contacts the inner wall of the guide hole, the soft and smooth surface of the soft sleeve can effectively reduce the direct friction force between the two, the surface material of the ball guide column or the guide hole of the mold is prevented from being scraped and worn due to high-intensity friction, meanwhile, the soft sleeve can also fill the possible tiny gap between the ball guide column and the guide hole, the movement is more stable, the additional friction and wear caused by shaking and impact are reduced, and the pulling phenomenon of the ball guide column and the mold is avoided.

The invention relates to a method for coating a fluorine-containing base film on the surface of a cutter. The method comprises the following steps of: a, oil removal, degreasing and rust removal of the surface of the cutter; b, drying and dehydrating the surface of the cutter; c, coating the base membrane liquid; d, a micro-permeation process of the base membrane liquid; and e, curing the base film liquid.

The present application belongs to the technical field of mechanical cutting tool manufacturing, and particularly relates to a micro-textured tool based on laser micro-cladding in-situ forming, a preparation method and application thereof. Specifically, the present application successfully prepares a multi-layer coated tool with a micro-textured morphology. The tool has the advantages of micro-texture, laser cladding layer and multi-layer coating structure, and has high hardness, good self-lubricating performance, good toughness, strong coating adhesion and small internal stress of the coating, and will not produce defects such as deformation or micro-cracks of the tool substrate material. In the cutting process, the tool can effectively reduce the cutting force and cutting temperature, reduce tool wear and improve tool life, and can be widely applied to dry cutting and cutting of difficult-to-machine materials, and therefore has good practical application value.

The invention provides a carbon fiber reinforced polyether-ether-ketone self-lubricating composite material and a preparation method and application thereof.The preparation method comprises the steps that carbon fiber serves as an anode, voltage is applied to an electrolyte solution, electrochemical oxidation treatment is conducted, hydroxylated carbon fiber is obtained, the hydroxylated carbon fiber and 2-amino-5-nitrobenzothiazole are mixed, and the carbon fiber reinforced polyether-ether-ketone self-lubricating composite material is obtained. Adding an anhydrous modified reaction solvent, and reacting at 25-40 DEG C for 4-10 hours to obtain modified carbon fibers; and melting and granulating the self-lubricating composite material: mixing the modified carbon fiber, polyether-ether-ketone, a lubricant and an auxiliary agent in a high-speed mixer for 10-20 minutes, extruding by using a double-screw extruder, cooling, and granulating to obtain the carbon fiber reinforced polyether-ether-ketone self-lubricating composite material. The carbon fiber reinforced polyether-ether-ketone self-lubricating composite material is applied to self-lubricating mechanical parts. According to the self-lubricating composite material, the self-lubricating performance is improved, the interface bonding energy between the carbon fibers and the polyether-ether-ketone is enhanced, and the self-lubricating composite material has good mechanical performance.

This invention belongs to the field of metal rope technology, and provides a high-oil-content coated metal rope, its preparation method, and its application. The coated metal rope includes a metal rope and a plastic outer layer coated on the outer surface of the metal rope. The metal rope includes a core wire containing a first lubricating oil and side wires containing a second lubricating oil, with the side wires wound around the outer surface of the core wire. The flash point of the first lubricating oil is 20°C to 30°C higher than the melting temperature of the plastic outer layer; the flash point of the second lubricating oil is more than 50°C higher than the melting temperature of the plastic outer layer. The method of this invention can significantly reduce oil evaporation during the coating process of the plastic outer layer, avoiding bulging, air bubbles, and coating failure. The prepared high-oil-content coated metal rope has good self-lubricating properties, which can significantly reduce internal friction and breakage of the metal rope. It can be applied to the drive mechanism of vehicle sliding doors.

The application relates to a box cargo fan-shaped upper shelf system, which comprises a device module and a general control module for controlling the device module, the general control module comprises a control module, a fan-shaped upper shelf analysis module, a depth marking module and a threshold control module, the device module comprises a mechanical arm module, a stacking module and a shelf module, the shelf module comprises a plurality of shelves, and different shelves are divided into a shelf A and a shelf B based on shelf positions, and the division of the shelves can be selected based on information of the box body and divided into multiple kinds; the application has the advantages of improving the warehouse-out efficiency and self-lubrication of the stacking machine.

The utility model relates to a novel fuel pump liquid level sensor support module which comprises a top cover assembly, a sensor support, an oil level sensor assembly and an oil pump assembly. A supporting rod of a top cover assembly sequentially penetrates through a support guide rod hole of a sensor support and an oil pump guide rod hole of an oil pump assembly, due to the fact that motorcycle oil tanks are various in shape, the upper space in part of the oil tanks is large, and the lower space is small, when the oil level center is low, design cannot be well achieved; therefore, by adding the sensor support, the oil level sensor assembly can be installed at a higher point on the basis that the original structure is not affected, and oil level design is facilitated. The sensor support is compact in structure, reasonable in design, short in forming period, easy to control in size, high in plastic deformation, high in universality, capable of meeting production and assembly requirements, low in requirement for operating skills of workers, easy to master, high in product percent of pass and capable of meeting the working performance requirements of products.

The invention provides a collector ring carbon brush structure of a wind driven generator, and relates to the technical field of generator carbon brush maintenance. The collecting ring is arranged in the generator main body and is connected with the generator; the brush holder supporting mechanism is arranged in the generator main body and is fixedly connected with the interior of the generator shell; the carbon brush mounting mechanism is arranged on the brush seat supporting mechanism and fixedly connected with the brush seat supporting mechanism, and a carbon brush is mounted on the carbon brush mounting mechanism; the carbon brush is of a cuboid structure, after the carbon brush is installed on the carbon brush installation mechanism, the side face of the carbon brush makes contact with the collecting ring, and the shape of the contact face of the carbon brush is matched with the external shape of the collecting ring. And the monitoring device is arranged in the generator main body, is connected with the carbon brush mounting mechanism, and is used for detecting the wear degree of the carbon brush and the contact condition of the carbon brush and the collecting ring. When the carbon brush is worn to a certain degree, the carbon brush head can be replaced, and the service life of the carbon brush is prolonged.

The present invention discloses a landfill covering system, including an impermeable layer, a pest trapping layer, a garbage layer, a clay layer and nutrient soil arranged in sequence from bottom to top, the pest trapping layer including an insect trapping pipe and an insecticidal pipe, the insecticidal pipe is provided with an insect trapping mechanism and an insecticidal mechanism inside, the insecticidal mechanism including an insect trapping gas storage box fixedly connected to the top of the insecticidal pipe, the insecticidal pipe is fixedly connected with a hair dryer inside, the air inlet of the hair dryer is communicated with the insect trapping gas storage box through a pipe, and the air outlet of the hair dryer is communicated with the insect trapping pipe through a pipe. The present invention provides a pest trapping layer, and during trapping, trapping and killing work is performed by first discharging trapping gas and then discharging insecticidal liquid, which can kill pests in garbage to a great extent, and prevent pests from damaging the landfill system, thereby achieving the purpose of continuously killing pests after landfilling.

The invention discloses a high-wear-resistance molybdenum disulfide / fluorinated graphene composite material lubricating additive and a preparation method thereof. The preparation method comprises the following steps: dispersing an ionic liquid in distilled water, and then adding molybdenum disulfide to form a mixed solution; sequentially carrying out ultrasonic treatment, multiple mechanical crushing treatment and centrifugal treatment, and then taking supernate to obtain molybdenum disulfide dispersion liquid; the preparation method comprises the following steps: dispersing an ionic liquid in distilled water, then adding graphite fluoride to form a mixed solution, then putting the mixed solution into a high-pressure kettle for hydrothermal reaction, and then taking supernate after centrifugal treatment to obtain a fluorinated graphene dispersion liquid; and mixing the molybdenum disulfide dispersion liquid and the fluorinated graphene dispersion liquid according to the mass ratio of (1-3): 1, and performing ultrasonic treatment to form the molybdenum disulfide / fluorinated graphene composite material lubricating additive. The synthesis method is simple, wide in raw material source, low in cost, free of pollution and more suitable for industrial popularization and application. The prepared material has excellent stability and high wear resistance.

The invention provides a novel ball collecting net end cover, and relates to the field of ball collecting nets, the novel ball collecting net end cover comprises an end cover, a copper sleeve, a framework oil seal and an oil injection nozzle, the copper sleeve is arranged in the end cover, the framework oil seal is installed between the copper sleeve and the end cover, the head of the end cover is provided with the oil injection nozzle, and the oil injection nozzle is communicated with a cavity between the end cover and the copper sleeve. The framework oil seal is arranged to form a reliable sealing system, external impurities are prevented from entering key matching parts, the interior is kept clean, the stability and reliability of equipment operation are further guaranteed, faults caused by impurity jamming are reduced, the equipment fault rate is reduced, and the overall operation efficiency of a power plant is improved; meanwhile, the copper sleeve made of tin bronze is good in self-lubricating property, and the lubricating mode that grease is injected through the grease injection nozzle is matched, so that friction between the copper sleeve and the transmission shaft is greatly reduced, the transmission efficiency is improved, the service life of the copper sleeve and the transmission shaft is prolonged, and the jamming phenomenon caused by abrasion is prevented.

The invention relates to a high-bearing large-speed-ratio precise speed reducer which is characterized in that two end parts of a worm are rotatably supported on shell walls on two sides of the front end part of a shell, and one end of the worm is a power input end; two external thread sections with opposite rotation directions are arranged on the worm close to the two ends; the two worm gears are respectively meshed with two external thread sections on the worm; the two worm gears are coaxially and fixedly connected with one ends of the two eccentric shafts respectively; the two ends of the two eccentric shafts are rotationally supported at the two ends of the middle of the machine shell respectively. Two mounting holes in one planet wheel are respectively matched with one eccentric shaft neck in the same direction on the two eccentric shafts in a rotating and supporting manner; two mounting holes in the other planet wheel are respectively matched with the other eccentric shaft neck in the same direction on the two eccentric shafts in a rotating supporting manner; teeth on the outer rings of the two planet gears are meshed with inner teeth of the inner gear ring, and the two meshing positions are arranged at an angle of 180 degrees. The two sides of an inner hole of the inner gear ring are matched with the two ends of the middle of the machine shell in a rotating and supporting mode. The transmission is large in transmission ratio and small in size, and has a self-locking function.

This utility model relates to a wear-resistant and quiet two-section hinge, comprising a first blade, a second blade, and a main shaft. The main shaft includes a male shaft and a female shaft. The male shaft is fixedly connected to the first blade, and the female shaft is fixedly connected to the second blade. One end of the female shaft has a blind hole, and one end of the male shaft has a convex shaft fixedly installed. The convex shaft rotatably engages with the blind hole. A wear-resistant sleeve made of polyetheretherketone (PEEK) is fixedly installed on the bottom inner wall of the blind hole. The top of the convex shaft fits against the wear-resistant sleeve. A polytetrafluoroethylene (PTFE) coating is fixedly installed at the opening end of the blind hole. A gap exists between the opposing surfaces of the male and female shafts. This design, through multiple improvements such as the inclusion of a PEEK wear-resistant sleeve, a PTFE coating, and a reasonable gap, solves the problems of high noise, easy wear, and poor applicability of traditional hinges, meeting the needs of hospitals, laboratories, data centers, and other application scenarios with high requirements for noise and cleanliness.

This utility model discloses a novel maintenance-free slewing bearing and its plastic oil separator, comprising an outer ring, an inner ring, and a plug. The plug passes through the outer ring and is adjacent to the outer side of the inner ring. An separator is disposed between the plug and the inner ring, and a steel ball is disposed within the separator. The plug is fixed to the outer ring by a tapered pin. Sealing rubber is disposed at the upper and lower ends of the outer ring and the inner ring, respectively. It possesses excellent heat resistance and self-lubricating properties; it can be injection molded and is environmentally friendly and pollution-free; it can be mass-produced, reducing costs. It achieves maintenance-free operation during use, reducing after-sales maintenance costs and extending product lifespan.

According to the composite plating layer electroplating process method, a plating solution comprises, by molar mass, 50%-80% of sodium hydroxide, 2%-3% of ZnO, 3%-7% of nickel sulfate, 2%-9% of triethanolamine, 0.4%-3% of tetraethylenepentamine, 1%-4% of sodium potassium tartrate tetrahydrate, 0.1%-1% of EDTA, 2%-7% of nano silicon dioxide, 0.6%-3% of nano titanium oxide, 12 mL / L of a primary brightener and 12 mL / L of a secondary brightener. By adding the nano silicon oxide and the titanium oxide, a multifunctional composite coating with enhanced surface hardness, self-lubrication, wear resistance and corrosion resistance can be produced, due to the nano size effect, the microstructure of the coating is refined, a finer grain structure is obtained, the compactness of the composite coating is improved, and the corrosion resistance is greatly improved.