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1304results about How to "Strong impact resistance" patented technology

Spatial six-degree-of-freedom vibration measuring and damping vibration attenuating method

The invention discloses a spatial six-degree-of-freedom vibration measuring and damping vibration attenuating method. The method comprises the following steps of: 1) erecting six-displacement-sensor parallel measuring and damping vibration attenuating mechanism; 2) fixing a detected motion object and a fixed platform; 3) obtaining a motion variation rule by using an expansion variation displacement time of an expansion pull rod, and obtaining a vibration rule of the detected motion object by using a measurement algorithm with a positive solution; 4) obtaining a damping value of a six-degree-of-freedom controllable damper required by the vibration by using a damping vibration attenuating algorithm; and 5) adjusting the damping value of the six-degree-of-freedom controllable damper to a value obtained by the damping vibration attenuating algorithm. According to the invention, six-degree-of-freedom measurements of three vibration displacements and three vibration angles of the motion object at the same measurement point are achieved by using one set of mechanism; meanwhile, the vibration control of the motion object can be achieved; and the spatial six-degree-of-freedom vibration measuring and damping vibration attenuating method disclosed by the invention has the advantages of high accuracy, simple structure, good flexibility, strong adaptability, wide application range and the like.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS +1

Method for deeply treating, desalting and recycling industrial wastewater with high salt content

ActiveCN104016530AImprove catalytic oxidation efficiencyGood removal effectMultistage water/sewage treatmentSuspended particlesFiltration
The invention relates to the field of industrial wastewater treatment processes and provides a method for deeply treating, desalting and recycling industrial wastewater with high salt content. The method comprises the following steps: 1) carrying out efficient coagulation treatment on the industrial wastewater with high salt content to obtain supernatant; 2) carrying out chemical precipitation on the supernatant obtained in the step 1) to remove high valence ions with valence higher than bivalence in the wastewater; 3) carrying out catalytic ozonation treatment on the supernatant subjected to chemical precipitation in the step 2); 4) carrying out multi-media filtration, precise filtration and membrane filtration treatment on the wastewater subjected to catalytic ozonation in the step 3) in sequence; and 5) carrying out electrodialysis reversal treatment on the effluent obtained after membrane filtration in the step 4). By adopting the method, organic matters, bacteria, colloids, suspended particles, Ca<2+>, Mg<2+> and high valence ions, other soluble inorganic salts and the like in the industrial wastewater with high salt content are removed by utilizing the coupling and synergistic effects of different unit technologies, thus achieving deep treatment, desalting and recycling of the industrial wastewater with high salt content.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Electric locomotive pantograph copper-soaking carbon contact strip producing method

The invention discloses an electric locomotive pantograph copper-impregnated carbon contact strip producing method. The method comprises the steps that 1, pitch coke powder, graphite powder, siliconized graphite powder and high temperature pitch are mixed according to the proportion to be ground into powder; the mixed powder is prepressed into a stage stock column, and then the stage stock column is solidified and squeezed to be molded and roasted, so that a composite carbon contact strip is obtained; 2, the composite carbon contact strip is cleaned and dried, then is cooled and placed into a graphite crucible, and is placed in an electric furnace at temperature of 1300-1400 DEG C to be preheated; copper liquid is poured into the crucible to soak the composite carbon contact strip, then the crucible is placed in an oil press cover, nitrogen is led in, heat preservation is kept for 3-5 min under the specific intensity of pressure, and finally cooling is carried after pressure releasing. According to the electric locomotive pantograph copper-impregnated carbon contact strip producing method, the electroconductibility of the copper-impregnated carbon contact strip is improved, the electrical resistivity is lowered, the mechanical strength of the carbon contact strip and copper impregnated angle can be increased, then the carbon contact strip abrasive resistance and self-lubrication are improved, the copper-impregnated carbon contact strip is more resistant to abrasion, main line damage and block dropping are avoided, the shock resistance is high, and the service life of the copper-impregnated carbon contact strip is prolonged.
Owner:SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING

Sewage treatment plant odor collection and treatment system and method

The invention discloses a sewage treatment plant odor collection and treatment system and method. The system comprises a gas collecting cover, a draft fan, a pretreatment spraying tower, a sterilization pool, a biological drip filtering tower, a centrifugal fan, an active carbon adsorption device and a regulating pool, wherein the gas collecting cover is arranged above a building pool body radiating odor, and is communicated with the lower part of a pretreatment spraying tower through the draft fan; the sterilization pool is communicated with the upper part of the pretreatment spraying tower;waste liquid discharged from the bottom of the pretreatment spraying tower flows back to the regulating pool through a pipeline; the lower part of the biological drip filtering tower is communicated with the top of the pretreatment spraying tower through a pipeline; odor subjected to pretreatment enters the biological drip filtering tower; a group of spray nozzles are arranged on the top of the biological drip filtering tower and downwards and intermittently spray nutrition liquid; the active carbon adsorption device is communicated with the top of the biological drip filtering tower through acentrifugal fan and is used for performing further treatment on the waste gas treated in the biological drip filtering tower and then discharging the waste gas in a standard reaching way. The investment is saved; the occupied area is small; the equipment is simple; the deodorization efficiency is high; the pollution bearing load is high; the operation cost is low.
Owner:HUBEI JUNJI WATER TREATMENT

Shape memory alloy (SMA) group rolling rod type large load releasing mechanism

The invention provides a shape memory alloy (SMA) group rolling rod type large load releasing mechanism. A segmented nut of the mechanism is firmly hooped by a hooping cylinder through rolling rods, simultaneously the upper end face and the lower end face of the segmented nut are respectively matched with an end cover and a separating ejector block, so that the segmented nut is a total nut and cannot move vertically. Groove are arranged on the segmented nut, so that when separation is needed, and the hooping cylinder moves downwards to drive the rolling rods to roll downwards and properly enter the grooves of the segmented nut when moving to a certain position, so that the segmented nut can obtain radial displacement. When releasing is finished, the hooping cylinder moves upwards under the effect of an SMA reset spring and simultaneously push the rolling rods out from the grooves, and the segmented nut draws close toward the inside to form an integral thread, so that repeated using function of the mechanism can be achieved, the segmented nut is fit with the separating ejector block through a conical surface, and the separating ejector block is matched with the hooping cylinder through two end faces. The shape memory alloy (SMA) group rolling rod type large load releasing mechanism is strong in shock resistance, releases large load and has the redundancy design and high reliability.
Owner:BEIHANG UNIV +1

Membrane bioreactor capable of realizing synchronous nitration denitrification denitrogenation function

The invention relates to the treatment of industrial wastewater and domestic sewage containing nitrogen, in particular a membrane bioreactor (MBR) which can realize the function of synchronous nitrogen removal of nitrification and denitrification. The reactor comprises a reactor cylinder, a membrane component, spherical elastic filler, dissolved oxygen (DO) electrode, a pH electrode, a thermometer and other on-line monitoring and controlling components. A water production end on an internal membrane component of the MBR is connected with a water production pressure gauge and a vacuum pump. Except the membrane component, the inside of the MBR is also evenly provided with the spherical elastic filler which forms an integer by connecting in series from top to bottom and is fixed on the top and bottom of the reactor. The bottom of the MBR has a micropore aerator connected with an air pump for the aeration utilization of the MBR. The membrane bioreactor introduces the porous spherical elastic filler into the MBR and regulates the micro-environment inside the MBR, so as to realize the function of synchronous nitrogen removal of nitrification and denitrification. The membrane bioreactor has small land occupancy and simple operation, saves energy consumption, can remove a plurality of pollutants of organic matters, ammonia nitrogen, etc., and is applicable to the treatment of industrial organic wastewater, domestic sewage, etc.
Owner:SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI

Sieving and crushing integrated machine

The invention discloses a sieving and crushing integrated machine. The sieving and crushing integrated machine comprises a machine housing, a sieving and distributing machine (1) arranged at an upper part of the machine housing, and a sieving and crushing machine (35) arranged at a lower part of the machine housing, wherein the sieving and distributing machine (1) comprises a charge hole (2), an arc-shaped distributing plate (6), an iron remover (11), a transmission device, a flange type sieve shaft (4) and a filter sieve shaft (5); the sieving and crushing machine (35) comprises a main rotor, an arc-shaped counterattack sieve roller set, a particle size adjusting device and a transmission device; and a charge hole (36) of the sieving and crushing machine is positioned below a discharge hole (9) of the sieving and distributing machine. The sieving and crushing integrated machine has the following creative effects: the original two-stage crushing and one-stage sieving mode is changed to be a one-stage sieving and one-stage crushing mode, so that a system structure is simplified; problems of material adhesion and blockage, high iron content, low sieving and crushing efficiency, high power consumption, non-uniform ring hammer wear, unadjustable particle size, high difficulty in overhauling and replacement of spare parts, inconvenience in operation and the like are solved; and the sieving and crushing integrated machine is a major innovation of sieving and crushing equipment technology.
Owner:SICHUAN ZHONGMENG ELECTRIC POWER EQUIP MFG CO LTD

Powder metallurgy preparation method of localization reinforced composite

ActiveCN106984808AReduce interface stressImprove performanceIron powderAlloy
The invention belongs to the technical field of composite preparation, and particularly relates to a powder metallurgy preparation method of a localization reinforced composite for manufacturing wear-resisting quick-wear parts of mining and building machines. The method comprises the following steps that (1) tungsten carbide powder and titanium carbide powder are used as reinforced particles, reduced iron powder and high-speed steel powder are used as a metal binder, and hard alloy powder is prepared according to a certain proportion; (2) the prepared hard alloy powder is put into a ball mill, and a process control agent is added for ball milling and mixing; and (3) a forming agent is added into the hard alloy powder subjected to uniform ball milling and mixing, and then the steps of mixing, prepressing, smashing, sieving particle making and the like are carried out. In a composite layer of the composite prepared through the method, discontinuous reinforcement areas are uniformly distributed in a continuous matrix area, cracks are not prone to being produced and expanding in the service process of the composite, and strength-toughness matching performance of the composite is achieved well; and the wear resistance of the composite can be obviously improved, and the service life of the composite can be obviously prolonged.
Owner:SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING

Room-temperature cured flexible epoxy adhesive and preparation method thereof

The invention relates to a room-temperature cured flexible epoxy adhesive and a preparation method thereof. The room-temperature cured flexible epoxy adhesive is characterized by being prepared from a component A epoxy resin and a component B epoxy curing agent; in a utilization process, the component A epoxy resin and the component B epoxy curing agent are selected at the weight ratio of the component A epoxy resin to the component B epoxy curing agent of (1.15 to 1.20) to 1; after the component A epoxy resin and the component B epoxy curing agent are sufficiently mixed, the room-temperature cured flexible epoxy adhesive is obtained, wherein the component A epoxy resin is prepared from the following components in parts by weight: 100.5 to 115 parts of epoxy resin, 0.5 to 20 parts of a reactive diluent and 0.5 to 20 parts of an epoxy accelerant; the component B epoxy curing agent is prepared from the following components in parts by weight: 5 to 15 parts of an alicyclic amines curing agent, 28 to 100 parts of a polyether amines curing agent, 10 to 80 parts of a curing accelerant and 0.5 to 2 parts of a bonding accelerant. The adhesive prepared by the method can be cured at room temperature, is high in bonding strength and good in low-temperature flexibility, and can be used for elastic bonding.
Owner:武汉拓路特铺技术工程有限公司

Star-shaped hydroxyl polyester adopting polyhydric alcohol as nucleus and preparation method and application of star-shaped hydroxyl polyester

The invention discloses star-shaped hydroxyl polyester adopting polyhydric alcoho as a nucleus and a preparation method and an application of the star-shaped hydroxyl polyester. The preparation method comprises the following steps: enabling 1 to 8 molar caprolactone and 1 to 4 molar anhydride to react for 6 to 10 h at 80 to 140 DEG C by adopting 1 molar small molecular polylasic alcohol as a core molecule to obtain a matrix star-shaped polyester, then reacting with 1 to 4 molar monoglycidyl ether at 90 to 150 DEG C to obtain star-shaped hydroxyl polyester. The prepared star-shaped hydroxyl polyester has the advantages of simple synthesis process, high solid content and low viscosity, a hydroxyl value is 140 to 250 mg KOH/g (80 percent of solid content), the viscosity at 25 DEG C when the solid content is 80 percent is 300 to 3000cp, the star-shaped hydroxyl polyester can be cross-linked with a polyurethane curing agent containing an isocyanate group and can be used for preparing a coating with a high solid content, the VOC content at the construction viscosity is smaller than 380 g/L, and the film performance can satisfy the national standard of the solvent-type dual-component polyurethane wood coatings.
Owner:SOUTH CHINA UNIV OF TECH +1

Method and device for realizing lasting and stable accumulation of nitrite nitrogen under low-temperature condition

The invention relates to a method and device for realizing the lasting and stable accumulation of nitrite nitrogen under a low-temperature condition. The lasting and stable accumulation of the nitrite nitrogen is completed in two stages of biological aerated filter systems. The method comprises the following steps: step a. starting a first-stage biological aerated filter and a secondary-stage biological aerated filter, cleaning a filter material, soaking, forming a biofilm, commissioning and operating; b. preparing testing wastewater, and maintaining water temperature at 6 to 10 DEG C; c. enabling wastewater to flow out from a head tank and enter the first-stage biological aerated filter from below; and d. enabling yielding water of the first-stage biological aerated filter to enter the secondary-stage biological aerated filter from bottom to top in the same way. The nitration types of the two stages of biological aerated filter are nitrous acid-type nitration, the stable accumulation of NO2--N in the yielding water is shown, the accumulation rate is 63.2% to 79.8%, and the accumulation time is up to 30 to 35 days. The method has the advantages that the biofilm process adopting the two stages of biological aerated filters can be used for solving the problems of high energy consumption at a high temperature (30 to 40 DEG C), and sludge bulking under a low DO (Dissolved Oxygen) condition, and the effective removal of organic matters in wastewater with a low C/N ratio (less than 3) and the lasting and stable accumulation of NO2--N are realized.
Owner:HUBEI POLYTECHNIC UNIV

Preparation method of rare earth hydrotalcite-like compound/polymer nanocomposite

The invention relates to a rare earth hydrotalcite-like compound/polymer nanocomposite and a preparation method thereof. The method comprises the following steps: firstly prefabricating: dissolving sodium metaaluminate and sodium hydroxide in deionized water to prepare a solution A, dissolving magnesium chloride in deionized water to prepare a solution B, dissolving rare earth oxide with dilute hydrochloric acid and then putting them into the solution B to prepare a solution C, and dissolving a single ligand or a mixed ligand in sodium stearate to prepare a mixed slurry D; then under the action of strong stirring or ultrasonic wave, simultaneously adding the solution A and the solution C dropwisely in the mixed slurry D to prepare a mixed slurry E, aging, conducting pumping filtration, drying the filter cake to obtain a bright fluorescent rare earth hydrotalcite-like compound; and immersing the rare earth hydrotalcite-like compound in a polymer monomer and initiator for 24 hours, and then conducting polymerization to obtain the nanocomposite. The materials disclosed herein has excellent luminescence property of original rare earth complex, and has the advantages of good formability, strong impact resistance, light weight, low cost, easiness in film formation and the like of organic polymer materials.
Owner:FUJIAN NORMAL UNIV
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