87results about How to "Remove completely" patented technology

This invention relates to an insulating oil and an oil-paper insulation system containing superhydrophobic nanoparticles, as well as their preparation method and application, belonging to the field of electrical equipment insulation technology. This invention provides an insulating oil containing superhydrophobic nanoparticles, wherein the superhydrophobic nanoparticles are silane-modified nanoparticles, and the nanoparticles include at least one of SiO2, TiO2, and h-BN; the insulating oil includes at least one of mineral insulating oil, synthetic insulating oil, and natural ester insulating oil. This invention achieves the superhydrophobicity of the nanoparticles and good compatibility with the oil phase through silane modification. Adding silane-modified nanoparticles to the insulating oil effectively reduces the water content of the insulating oil and optimizes the interfacial performance of the oil-paper. Combined with the low-temperature, high-efficiency, and uniform rapid impregnation process of this invention, the overall electrical performance and service life of the oil-paper insulation system are significantly improved.

The invention relates to an environment-friendly process method for improving the surface metal cleaning efficiency of a silicon wafer, and belongs to the technical field of semiconductor silicon wafer processing, and the process method comprises the following operation steps: S1, pre-cleaning and activation: placing the silicon wafer in a first cleaning tank, introducing ozone into ultrapure water, and processing in cooperation with low-frequency ultrasound; and S2, main cleaning and complexing: placing the silicon wafer subjected to pre-cleaning and activating treatment in a second cleaning tank, and treating the silicon wafer in a dilute citric acid solution in cooperation with high-frequency ultrasound. And S3, overflow rinsing: placing the silicon wafer subjected to main cleaning and complexing treatment in a third cleaning tank. And S4, drying: carrying out drying treatment on the silicon wafer subjected to the overflow rinsing treatment. Through the synergistic effect of physical stripping, chemical oxidation and complexing dissolution, under the condition that highly toxic chemicals such as hydrofluoric acid are not used, the cleanliness of metal on the surface of the silicon wafer reaches the ppt level, and the problems that traditional RCA cleaning is serious in environmental pollution and high in operation risk are effectively solved.

This invention discloses a capsule centrifugal oil removal device. A rotating drum assembly is mounted on a frame, and a centrifugal assembly is located on the feed side of the rotating drum assembly, with a pellet inlet pipe inserted into the centrifugal assembly. The centrifugal assembly includes a centrifugal hub driven by a centrifugal motor. A conical section is provided on the centrifugal hub, with its diameter gradually increasing from the feed end to the discharge end. Several sieve holes are staggered along the conical section. This invention adds a centrifugal assembly before the rotating drum assembly, centrifuging and separating most of the oil within the centrifugal assembly before feeding the pellets back into the rotating drum assembly for further separation of the remaining oil. This results in more thorough oil removal, better oil removal effect, less residual oil on the pellets, significantly improved drying speed, shorter drying time, better drying effect, and higher production efficiency.

The utility model discloses cloth bag dust remover relates to dust remover technical field, including dust removal cylinder, the dust removal cylinder top is fixedly arranged with the air inlet pipe, the dust removal cylinder bottom is fixedly arranged with the impurity removal mouth, and the dust removal cylinder outside wall is provided with the suction mechanism, and the dust removal cylinder inside is provided with the cleaning mechanism, and the cleaning mechanism includes the air pipe, and the air pipe outer wall is fixedly arranged with L type branch pipe, and L type branch pipe upper end is fixedly arranged with the connecting pipe, and the connecting pipe bottom is fixedly arranged with cloth bag body, and the dust removal cylinder top is fixedly arranged with the motor, and L type branch pipe side end is fixedly arranged with the cleaning brush for cleaning dust removal cylinder inner wall, and the dust removal cylinder top is fixedly arranged with the pulse valve, and the output of pulse valve is fixedly arranged with the catheter. Blow out gas through a plurality of gas outlets, clean the impurities adhered to the surface of the cleaning brush, and the dust and other impurities adsorbed on the outer surface of the cloth bag body fall down through the airflow blown into the cloth bag body by the connecting pipe.

The utility model relates to the technical field of ventilation cooling equipment, in particular to ventilation cooling equipment for a dust-free workshop, which comprises an air inlet pipeline, a filter assembly and a cleaning assembly, one end of the air inlet pipeline is provided with an air inlet, the other end of the air inlet pipeline is provided with a ventilation opening, and the filter assembly comprises a metal filter screen and an electrostatic adsorption filter screen. The metal filter screen and the electrostatic adsorption filter screen are both located in the air inlet pipeline, and the metal filter screen is located on the side close to the air inlet. After external air is filtered through the metal filter screen, the electrostatic adsorption filter screen, the nanofiber folding filter element and the carbon nanotube honeycomb filter element, large-particle to nanoscale impurities can be efficiently removed, and the air purification effect is improved. The cleaning assembly is designed for the air inlet side of the filter element, a scraper drives scrapers of different flexibility to rotate, the air inlet side of the filter element is cleaned in a targeted mode, the cleaning effect is improved, the filter element is prevented from being damaged, the service life of the filter element is prolonged, and efficient operation of the filtering assembly is guaranteed.

The application discloses a preparation method and application of high-purity cesium iodide, which comprises the following steps: firstly, mixing an industrial-grade cesium source powder and an iodine source solution, and preparing a solid powder after vacuum rotary evaporation and drying; then repeatedly washing the powder by using a special detergent, removing impurities, and drying; sintering at a temperature of 200-350 DEG C; dissolving the sintered powder in deionized warm water, and cooling and crystallizing at 0 DEG C; and finally collecting and drying the crystallization product to obtain the high-purity cesium iodide (CsI) finished product. The CsI powder prepared by the application has a purity of more than 99.99%, can obtain more excellent comprehensive performance, and has a simple and controllable process, and has a wide application prospect in the field of perovskite solar cells.

This invention discloses a low-pressure casting and heat treatment process for high-strength and high-toughness aluminum alloy used in contact wire ratchet, belonging to the field of rail transit component manufacturing technology. The process uses AlSi7Mg0.3 alloy, obtaining high-purity aluminum liquid through two refining and modification treatments. In the low-pressure casting stage, a three-stage pressure control is adopted: the first stage is the liquid-raising stage, the second stage is the mold-filling stage, the third stage is the pressure-increasing and shrinkage-compensating stage, and finally, pressure holding and cooling are performed; followed by T6 heat treatment. This invention solves the casting problems of easy air entrapment in ratchet teeth and easy shrinkage porosity in the hub. The casting has a tensile strength ≥275MPa and a breaking load ≥94.5kN, meeting the requirements for a 2×10 contact wire ratchet. 5 Secondary fatigue load requirements.

The utility model discloses dust removal equipment for paper product production, which comprises a fixed frame, an upper dust removal cover and a lower dust removal cover are fixed on the inner side of the fixed frame, and a dust removal assembly is arranged between the upper dust removal cover and the lower dust removal cover; the dust removal assembly comprises an upper cleaning brush, a lower cleaning brush, an upper exhaust pipe and a lower exhaust pipe, the upper cleaning brush and the lower cleaning brush are oppositely arranged and are driven by a servo motor, the upper exhaust pipe and the lower exhaust pipe are communicated with the filter box through a pipeline assembly, a sealing plate is detachably installed on the front face of the filter box, and the sealing plate is arranged on the front face of the filter box. Three filter screen plates are fixed to the side, close to an inner cavity of the filter box, of the sealing plate. According to the paper product dust removal device, dust on the upper face and the lower face of a paper product can be removed at the same time, stubborn flying chips or dust adhering to the paper product can be removed more thoroughly through the sweeping effect, and therefore the better dust removal effect on the paper product can be achieved; and the cleanliness of the rolled paper products can be better guaranteed.

The utility model provides a cleaning and screening device for polygonum multiflorum production, and relates to the technical field of polygonum multiflorum production equipment. A drying assembly; the drying assembly comprises an industrial heater fixedly connected to the cleaning box body, and the output end of the industrial heater is fixedly connected with a dispersing pipe; an agitating assembly; the stirring assembly comprises a bottom plate fixedly connected to the bottom end of the interior of the cleaning box body, a motor is installed at the bottom end of the bottom plate, and stirring columns are rotationally connected to the two sides of the interior of the cleaning box body; through the design, the technical field of polygonum multiflorum production equipment can be quickly cleaned, quick and uniform drying can be achieved after cleaning is completed, moisture on the surface of polygonum multiflorum can be treated, the mildew problem caused by excessive moisture is solved, and compared with a traditional manual cleaning mode, the cleaning efficiency is improved. Impurities with or without surface charge can be more thoroughly removed, and the competitive selection quality is improved.

The invention relates to a refining method for reducing and controlling a plasticizer and 3-chloropropanol ester in camellia oil, and aims to effectively control the plasticizer, the 3-chloropropanol ester and glycidyl ester in the camellia oil and maintain nutritional ingredients and natural flavor of the camellia oil. The method comprises the steps of acidification degumming, alkali refining deacidification, water washing, decoloration, dual-temperature deodorization, low-temperature adsorption and the like, and particularly, the vacuum degree and the temperature are finely adjusted in the deodorization process, so that control over a plasticizer, 3-chloropropanol ester and glycidyl ester is effectively considered.

A highly efficient method for recycling waste crystalline silicon solar cells includes the following steps: S1, placing the waste crystalline silicon solar cells in a mixed solution of phosphate and ammonium fluoride to react, dissolving the aluminum back surface and initially etching the silicon nitride layer, causing the silver grid lines to detach, resulting in solid-liquid separation of the silver grid lines and a filter cake; S2, continuing to immerse the filter cake in the mixed solution from step S1 to completely etch the silicon nitride layer, obtaining a silicon wafer; S3, immersing the silicon wafer in a sodium hydroxide solution to remove the surface oxide layer, cleaning, and drying to obtain a high-purity silicon wafer. This invention achieves highly efficient separation of silver and aluminum grid lines from the silicon wafer and precise removal of silicon nitride and oxide layers through a stepwise chemical etching strategy, achieving a total silicon wafer recovery rate of over 96%. The process is short, simple to operate, and has low reagent costs, effectively solving the pollution problem of waste crystalline silicon solar cells, demonstrating significant environmental benefits and economic value, and is easy to scale up and apply.

The invention discloses an integrated micro-fluidic chip system for detection, photothermal decomposition and verification of perfluorinated and polyfluoroalkyl substances. The integrated micro-fluidic chip system comprises an upper ultraviolet light-emitting layer, a middle micro-fluidic main body layer and a lower constant-temperature heating layer, the middle microfluidic main body layer internally comprises an inlet channel, an optical detection module, a photothermal decomposition chamber, a circulating pump structure, a residue verification chamber and an outlet channel; the upper ultraviolet light-emitting layer and the lower constant-temperature heating layer are respectively arranged corresponding to the photothermal decomposition chamber so as to provide a light field and a thermal field which have a synergistic effect; the system further comprises an external control circuit for controlling the operation of the circulating pump structure, the upper ultraviolet light-emitting layer and the lower constant-temperature heating layer, and controlling the path selection of the fluid according to the output result of the residual verification chamber, so as to realize a closed-loop treatment flow. According to the three-layer micro-fluidic chip system provided by the invention, efficient and reliable treatment on perfluoro and polyfluoroalkyl substances is realized through photo-thermal synergistic degradation and closed-loop feedback control.

This invention discloses a method for preparing and applying chitosan-encapsulated CoCe layered double hydroxide CoCe-LDH. This material can achieve rapid and efficient degradation of roxarsone and removal of the resulting inorganic arsenic. In this material, LDH is encapsulated by chitosan, resulting in a sheet-like material. Chitosan can disperse active sites and adsorb and enrich PMS, while LDH can transfer PMS ions into the anion layer through anion exchange, thereby increasing the active sites. After coupling with the material, PMS is specifically converted to... 1 O2 accelerates the degradation rate.

The invention belongs to the technical field of semiconductor manufacturing, and particularly relates to a three-step wet chemical cleaning method for a gallium nitride single crystal substrate. The method comprises the following steps: pre-cleaning the surface of a GaN single crystal substrate, cleaning with concentrated sulfuric acid and hydrogen peroxide, and flushing with deionized water; soaking in a BOE solution and then washing with deionized water; soaking in a mixed solution of hydrochloric acid and hydrogen peroxide, washing with deionized water, and finally drying. According to the method, step-by-step targeted removal and synergistic interaction of different pollutants are realized through a specific three-step sequential cleaning method. The pre-cleaning step aims at removing large-size particles attached to the substrate in the machining and transporting process, a consistent starting point is provided for follow-up fine chemical cleaning, and macroscopic pollutants are prevented from interfering with chemical reactions or causing secondary pollution.

The invention relates to the technical field of battery sealing nail welding, and provides a battery sealing nail welding defect repairing method. The repairing method comprises the following steps: acquiring an aluminum wafer of which the diameter is greater than that of a liquid injection hole of the battery top cover; removing the sealing nail at the liquid injection hole of the top cover of the battery; cleaning a liquid injection hole area; carrying out penetration type stitch welding by taking the wafer as an upper layer and the battery top cover as a lower layer to form a welding seam for melting the wafer and the battery top cover into a whole; and treating the welding seam and the wafer, enabling the outer surface of the wafer to be flush with the outer surface of the battery top cover, and enabling the liquid injection hole area not to be visually recognized. According to the repairing method, the aluminum wafer and the battery top cover are subjected to penetration stitch welding, and the welding seam and the surface of the wafer are treated, so that the welding defect of the sealing nail is repaired, the situation that the battery is degraded and scrapped due to poor welding or appearance defect of the sealing nail is avoided, and the quality requirement of the battery is met.

This utility model discloses a centrifuge for preparing rubber anti-aging agents, belonging to the technical field of rubber processing equipment. It includes a machine body and a primary centrifuge cylinder. An installation groove is formed on the upper surface of the machine body, and a partition plate is fixedly connected inside the installation groove. A bearing is fixedly connected to the upper surface of the partition plate, and a transmission rod is rotatably connected inside the bearing. A secondary centrifuge cylinder is fixedly connected to the upper end of the transmission rod. A connecting sleeve rod is fixedly connected inside the primary centrifuge cylinder, and a connecting assembly is fixedly connected inside the secondary centrifuge cylinder. This utility model, by setting up the connecting assembly, makes the connection and disassembly of the primary and secondary centrifuge cylinders very convenient, improving the operability and efficiency of the equipment. By setting up primary and secondary centrifuge cylinders, the efficiency and effect of centrifugal separation are increased, enabling more thorough removal of impurities and liquids from rubber products, thus improving the quality of the rubber products.

The utility model relates to the technical field of glass processing dust removal, in particular to an automatic carrier roller dust removal mechanism for plate glass production, which comprises two groups of support frames arranged in parallel, rotating rollers are rotatably connected between the side walls of the top ends of the support frames, and the rotating rollers are sequentially arranged along the top walls of the support frames. First displacement mechanisms are arranged at the top ends of the supporting frames correspondingly, a limiting arm is fixedly connected between the moving ends of the first displacement mechanisms, a second displacement mechanism is movably connected to the surface of the limiting arm, and a sweeping mechanism is fixedly connected to the end, close to the rotating roller, of the second displacement mechanism. Through cooperation of the first displacement mechanism and the second displacement mechanism, accurate positioning of any position of the surface of the glass is achieved, specific polluted areas are cleaned in a targeted mode, it is ensured that each dirty area can be effectively treated, and cleaning dead corners are avoided.

This application relates to the field of cleaning device technology, specifically to an empty disk residue blowing device, including a conveyor frame, a camera mechanism, a cleaning mechanism, and a dust removal mechanism. The camera mechanism is mounted on the conveyor frame to acquire images of the empty disk surface; the cleaning mechanism is adjustablely mounted on the conveyor frame and starts or stops blowing gas onto the empty disk surface based on the image information of the empty disk surface acquired by the camera mechanism; the dust removal mechanism is used for air filtration. In this application, the images captured by the camera mechanism are used to detect residue on the empty disk, thereby facilitating the cleaning mechanism to blow away residue from the empty disk surface, avoiding blind blowing, improving the accuracy and effectiveness of cleaning, and enabling more thorough removal of residue from the empty disk surface. The dust removal mechanism is used to filter dust in the air, so that the residue blown away by the cleaning mechanism is filtered through the dust removal mechanism, reducing dust entering the air and causing environmental pollution.

The utility model discloses an injection molding machine convenient to clean, which belongs to the technical field of injection molding machines and comprises a base, the top of the base is fixedly connected with a mold closing box and an injection molding machine body respectively, and a male mold is arranged on one side of the mold closing box. The cleaning assembly is arranged, the first servo motor drives the rotating shaft to rotate, the rotating shaft drives the scraping strip to rotate through the rotating rod, the scraping strip is tightly attached to the inner wall of the hopper, cleaning dead corners do not exist, waste can be thoroughly removed, automatic cleaning is achieved, manpower and time cost are saved, and meanwhile the cleaning assembly can prevent the hopper from being blocked when the injection molding machine works. By arranging the lifting assembly, the lifting assembly drives the hopper and the injection molding machine body to be separated through the connecting block and then ascends, and the hopper is driven to rotate by a certain angle after ascending by a certain distance, so that waste materials fall aside when the hopper is cleaned, the waste materials are effectively prevented from falling into the injection molding machine, and the product quality problem caused by mixing of the waste materials is avoided.

The utility model relates to the technical field of oxygen-free copper rod processing, in particular to a melt purification mechanism for oxygen-free copper rod processing, which comprises a refining furnace body, a stirring component is arranged in the refining furnace body, the stirring component comprises a stirring shaft and a plurality of stirring blades, and a stirring motor for driving the stirring shaft to rotate is arranged at the top of the refining furnace body; a degassing assembly is arranged in the refining furnace body and comprises a plurality of degassing pipes, each degassing pipe is provided with a plurality of evenly-distributed air nozzles, and the degassing pipes are connected with an inert gas source through pipelines. A filter box is arranged below the refining furnace body, a multi-stage filter assembly is arranged in the filter box, and the multi-stage filter assembly comprises a coarse filter screen, a middle filter screen and a fine filter screen which are sequentially arranged from top to bottom; a cleaning assembly is arranged at the top of the filter box and comprises a plurality of cleaning brushes, and the cleaning brushes are correspondingly arranged over the coarse filter screen, the medium filter screen and the fine filter screen respectively; through the synergistic effect of stirring, degassing, multi-stage filtering and automatic control links, the purification efficiency and quality of the oxygen-free copper melt are improved.

The present application relates to a kind of oxygen plasma cleaning method and system for removing cavity ion contaminants in situ.The method first controls the pressure in the cavity below 300 mTorr, and oxygen is introduced into the cavity;Radio frequency is applied to the cavity to ionize oxygen into oxygen ions and high-energy electrons;Oxygen ions and metal ions undergo physical sputtering, causing metal ions to desorb from the surface of the cavity, while high-energy electrons and metal ions undergo neutralization reactions;Finally, the characteristic peaks of metal ions in the cavity are monitored in real time using optical emission spectroscopy, and the cleaning is completed using feedback regulation until the characteristic peaks of metal ions meet the preset conditions.Compared with the prior art, the present application has the advantages of good cleaning effect, high efficiency, environmental protection, stability and the like.

The invention discloses a degreasing method of a silicon nitride ceramic substrate, which belongs to the field of advanced ceramic preparation, and comprises the following steps: in a silicon nitride green body pre-degassing stage, heating to 140-160 DEG C; in the silicon nitride green body pre-decomposition stage, the temperature is increased to 230-270 DEG C, and N2 is added; in the oxygenolysis and catalytic chain scission stage of the silicon nitride green body, the temperature is raised to 350-400 DEG C, and the volume ratio of N2 to O2 is 97: 3-90: 10; in the inert purification and structure relaxation stage of the silicon nitride green body, the temperature is increased to 450-600 DEG C, and N2 is added; in a silicon nitride green body cooling stage, cooling to 180-220 DEG C, and adding N2; the temperature rise rate gt of the silicon nitride green body inert purification and structure relaxation stage; the heating rate gt of the silicon nitride green body in the pre-decomposition stage; the temperature rise rate gt of the oxygenolysis and catalytic chain scission stage of the silicon nitride green body; the temperature rise rate in the oxygenolysis and catalytic chain scission stages of the silicon nitride green body is increased. According to the method, the degreasing time is shortened by 40% or above, the warping rate of the green body is reduced to be smaller than or equal to 1%, the single-stack stacking amount is increased to be larger than or equal to 30 pieces, and the production efficiency and the product quality are remarkably improved.

The utility model discloses a kind of burr trimming device for producing automotive interior trim part, it is related to technical field.The utility model includes workbench, and workbench is provided with flattening mechanism and cutting mechanism;The bottom of the workbench is fixedly connected with two supporting legs, and the top of the workbench is fixedly connected with two supporting frames one, and the top of two supporting frames one is fixedly connected with supporting frame two, and the flattening mechanism includes the rectangular plate below supporting frame two.The utility model is provided with flattening mechanism, solve the burr trimming device in the use process of existing, it is inconvenient to flatten interior trim part on workbench, interior trim part will appear wrinkle, warping or local bulge on workbench, trimming tool is difficult to accurately adhere to component edge, and then leading to burr trimming not thoroughly, edge uneven, even mis-cut normal part, affect component size accuracy and appearance quality problem.

The application discloses a kind of protective film base film surface pretreatment and adhesion promotion device, it is related to protective film base film processing field, including machine body, the outside one side of the machine body is provided with gas supply mechanism, the inside bottom of the machine body is provided with cleaning mechanism, the inside of the machine body is provided with filter mechanism, the inside of the machine body is rotatably installed with corona roller, the inner wall of the machine body is fixedly installed with two groups of discharge assembly matched with corona roller.The auxiliary rod of the cleaning mechanism is misaligned arrangement, and the base film is bent and immersed in cleaning solution, and the rubber roller and the sponge roller are matched with the opposite operation to complete the double-sided deep cleaning of the base film, so that the surface dust, oil stains and other impurities can be completely removed, and then the two groups of discharge assembly are used to complete the graded corona activation, and then directional suction filter mechanism is matched with circulating air drying structure to realize the green and efficient operation of the pretreatment process, and the two groups of filter components can directional suction ozone and colloidal pollutants generated by corona treatment.

This invention discloses a method for extracting high-purity ammonium tetramolybdate from a waste oil hydrogenation catalyst. S1, Primary ammonia dissolution: 28% ammonia water, water, and molybdenum acid extracted from the waste oil hydrogenation catalyst are added to a primary dissolution vessel. The mixture is stirred until the molybdenum acid is fully dissolved. The reaction time is controlled to 1 hour. The pH of the dissolved solution is 7-8. The molybdenum acid has a water content of 35% and a Mo content of 46-50%. This invention employs a stepwise deep impurity removal process of "magnesium chloride for phosphorus removal + 231 resin for vanadium removal," and sets up dual phosphorus and vanadium content detection to ensure that phosphorus <0.01g / L and vanadium <0.01g / L before proceeding to subsequent processes. The molybdenum-vanadium separation coefficient of 231 resin is much higher than that of ordinary resin, effectively avoiding impurity entrainment.

The utility model provides a kind of automobile wiring harness connector peeling device, automobile wiring harness connector peeling device includes U-shaped plate, the inner side wall of U-shaped plate is slidably reciprocating cutting assembly, the side of reciprocating cutting assembly is formed with multiple cutting pieces for the peeling of different outer diameter wiring harness, the side of reciprocating cutting assembly is further provided with multiple peeling components, multiple peeling components are located at the side of multiple cutting pieces respectively, the cutting depth of multiple peeling components is adjustable, the automobile wiring harness connector peeling device provided by the utility model can be suitable for the peeling of different outer diameter wiring harness, and the skin of different outer diameter can be removed, to avoid the phenomenon that wiring harness is not completely cut, cutting but broken silk is connected or excessive peeling damages metal wire, and the use effect is good, and the application range is wide.

The utility model relates to the technical field of multi-stage adsorption tanks, in particular to a multi-stage adsorption bed pressure balanced distribution structure which comprises an adsorption tank, an air inlet pipe is fixedly mounted at the bottom end of the adsorption tank, an air collecting plate is fixedly mounted at the bottom end in the adsorption tank, and the air collecting plate is fixedly connected with the air inlet pipe. A plurality of first distribution pipes are evenly and fixedly installed at the top end of the gas collecting plate, a plurality of partition plates are evenly and fixedly installed at the inner end of the adsorption tank, a connecting pipeline is fixedly installed in the middle of the top end of each partition plate, an electric control pressure adjusting valve is installed at the outer end of each connecting pipeline, and a distribution plate is fixedly installed at the top end of each connecting pipeline; a plurality of distribution pipes II are uniformly and fixedly mounted at the top end of the distribution plate; according to the utility model, the distribution pipe and the electric control pressure regulating valve are arranged, so that gas to be treated can be conveniently and uniformly distributed to each filter bed layer, and the situation that local flow is too large or too small is avoided, thereby ensuring that the pressure of each bed layer is relatively balanced.

The invention relates to the technical field of mechanical engineering, and discloses an anti-cavitation test system and method for a thrust bearing under high temperature, heavy load and high rotating speed, and the system comprises a heavy load simulation part, a high temperature simulation part and a high speed dynamic simulation part which are arranged in sequence. The high-temperature simulation part comprises a high-temperature box, a closed test cabin is arranged in the high-temperature box, and the test cabin is communicated with the vacuumizing subsystem through an air pipe and is communicated with the oil injection subsystem through an oil pipe; one side of the high-temperature box is slidably and hermetically connected with a thrust shaft, the other side of the high-temperature box is rotatably and hermetically connected with a power shaft, and the thrust shaft and the power shaft are coaxially arranged; one end of the thrust shaft extends into the test cabin and is fixedly connected with a first clamp for mounting a test sample piece, and the other end of the thrust shaft is connected with the heavy load simulation part; one end of the power shaft extends into the test cabin and is fixedly connected with a second clamp for mounting a thrust ring, and the other end is in transmission connection with the high-speed dynamic simulation part. The cavitation problem in the testing process is solved through vacuum pumping-high temperature oil cooperative control, and accurate testing conditions are provided for bearing performance judgment and product development.

The utility model provides cleaning agent recovery equipment with a multi-stage distillation purification function, which relates to the technical field of cleaning agent recovery and comprises a first-stage distillation tower, a condenser arranged at the top of the first-stage distillation tower, a feed port arranged at the top of the first-stage distillation tower, a connecting pipe arranged on one side of the condenser, a steam channel arranged on one side of a thermal insulation layer, and a second-stage distillation tower arranged on the other side of the thermal insulation layer. The second-stage distillation tower is arranged on one side of the first-stage distillation tower, the third-stage distillation tower is arranged on one side of the first-stage distillation tower, the feeding pipe is arranged on one side of the third-stage distillation tower, and the first-stage distillation tower, the second-stage distillation tower and the third-stage distillation tower are used in turn, so that a cleaning agent can be distilled and purified for multiple times; impurities and dirt in the cleaning agent are effectively removed, and the purity of the recycled cleaning agent is improved. Compared with single-stage distillation equipment, the multi-stage distillation equipment disclosed by the utility model can meet the use scene with a higher purity requirement, the application range of the recovered cleaning agent is expanded, and meanwhile, the multi-stage distillation towers are used in turn, so that the cleaning agent can be distilled and purified for multiple times.

The utility model discloses a wafer back cleaning device which comprises a mounting table, and the mounting table is provided with a front and back cleaning mechanism, a waterproof shield mechanism and a spin-drying mechanism. The front and back surface cleaning mechanism comprises a water inlet pipe, one end of the water inlet pipe is fixedly connected with a tee joint, the other two ends of the tee joint are fixedly connected with an upper surface liquid outlet pipe and a back surface liquid outlet pipe respectively, one end of the upper surface liquid outlet pipe is fixedly connected with a cleaning spray head, and the cleaning spray head is connected to the mounting table through a swing arm mechanism; and the protective shield mechanism comprises an inner waterproof shield, the inner waterproof shield is fixedly connected to the upper side of the mounting table, and the inner waterproof shield is sleeved with an outer waterproof shield. According to the wafer cleaning device, the front face and the back face of the wafer are cleaned at the same time, pollutants, including metal particles and organic matter on the back face, on the surface of the wafer are removed more thoroughly, and the higher cleaning effect and the better product quality are provided.