42results about How to "Controllable stability" patented technology

A wheel leg compound motion platform comprises a stand as well as more than two front wheel leg assemblies and more than two rear wheel leg assemblies which are connected to the bottom of the stand, wherein the stand comprises a front body plate and a rear body plate which are hinged together; the front wheel leg assembly and the rear wheel leg assembly respectively comprise a thigh swing arm, a wheel mechanism and a crus swing arm; one end of the thigh swing arm is hinged to the stand and can swing around a hinge point; the other end of the thigh swing arm is connected with one end of the crus swing arm to form an elbow part and can swing around the elbow part for achieving folding; a wheel mechanism is mounted on an intermediate section of the crus swing arm; and a foot part for finishing the walking is arranged at the tail end of the bottom of the crus swing arm. The wheel leg compound motion platform disclosed by the invention has the advantages of simple and compact structure, stability and reliability in motion, favorable controllability, simpleness in motion state switching, strong obstacle combing ability and the like.

The invention discloses a pressure-controlled friction stir welding main shaft head device which mainly comprises a hydraulic system, a main shaft oil cylinder outer casing and a main shaft piston mechanism, wherein the main shaft oil cylinder outer casing is formed by a front casing and a rear casing which are coaxially connected; the main shaft piston mechanism comprises a main shaft oil cylinder inner casing and a rotating shaft arranged in the main shaft oil cylinder inner casing; the rear end of the rotating shaft is connected with a sliding coupler through a spline shaft; a displacement sensor is arranged between the main shaft oil cylinder outer casing and the main shaft oil cylinder inner casing; a limiting block is arranged between the main shaft oil cylinder outer casing and the main shaft oil cylinder inner casing; a revolution speed transducer is arranged on the sliding coupler; and the length of the spline shaft is larger than the sum of the lengths of the distance between two axial travel spacing steps and a spline connection section. Compared with a structure of a main shaft used in a conventionally disclosed friction stir welding device, the main shaft head device has the characteristics that the dimension is small, the structure is simple, the integration level is high, a rotation driving manner is flexible, the pressure control principle is simple and accurate, and the like.

The invention discloses an aluminum oxide polishing powder and a production method thereof. The aluminum oxide polishing powder is characterized in that a D50 particle size is smaller than 2.0 microns and satisfies that D10 is no less than 0.5 times of D50, D90 is no more than 2 times of D50 and D100 is no less than 3 times of D50. The preparation method comprises the following steps of pulping raw materials of alpha-aluminum oxide with water, carrying out classification and obtaining a product. The aluminum oxide polishing powder has the advantages of small median particle diameter, narrow granularity distribution range, easy control of the polishing accuracy stability and small fluctuation of the product quality, can be used for accurate polishing processing of electronic product components including glasses for liquid crystal display screens, flat plane displays, optical elements, ultrathin glass substrates and glass magnetic discs and can also be used for preparing aluminum oxide polishing solution for polishing chemical machinery.

The invention discloses an erosion agent for Super304H austenitic stainless steel durable specimen tissue display, a preparation method and an application method, and the erosion agent comprises 30-40% by volume of distilled water, 35-45% by volume of analytically pure absolute ethanol, 10-15% by volume of analytically pure hydrofluoric acid, 10-15% by volume of analytically pure hydrochloric acid and 3-5% by mass of ferric chloride; the volume fraction of each component is the percentage of each component in the total volume of the erosion agent, and the mass fraction is the percentage of a solid in the total mass of the erosion agent. The invention also discloses the preparation method and the application method of the erosion agent. The erosion agent solves the problems that precipitated phases and crystal boundaries in a durable specimen are difficult to display by use of a Super304H austenitic stainless steel erosion agent in the prior art.

The invention provides an acrylic resin retanning agent, which is obtained by polymerization of the following raw materials in water: crylic acid or methacrylic acid; methacryloyloxyethyl trimethyl ammonium chloride; acetoacetate ethyl methacrylate; chain regulator; catalytic agent and initiator. The invention also provides a preparation method of the acrylic resin retanning agent. According to the method, polymerization of acrylic monomers can be initiated at low temperature, so that the stability of a reaction system in a feeding period is easy to control, the reaction is stable, the energyconsumption can be saved, and the green production is favored. The acrylic resin retanning agent provided by the invention has favorable filling performance and convergence performance, the compactibility of hide fiber can be improved, the color loss can be avoided, the absorption of dye and fatliquor is favored, the absorption rate is improved, the waste water emission is reduced, and the effects of dyeing and fatliquoring are improved.

The invention discloses a preparation method of whole wheat flour, and relates to the technical field of grain processing. The preparation method of the whole wheat flour comprises the following steps: subjecting dried wheat kernels to grinding and sieving to obtain wheat kernel powder for later use; subjecting bran and germ to airflow puffing treatment at 75-95 DEG C, and then performing grindingand sieving to obtain a powder mixture of the bran and the germ for later use; and uniformly mixing the wheat kernel powder and the powder mixture to obtain the whole wheat flour. The preparation method of the whole wheat flour provided by the invention firstly performs low-temperature airflow puffing treatment on the wheat bran and germ, and then backfills the mixture into the wheat powder to obtain the whole wheat flour. The whole wheat flour is rich in nutrients, and is not easy to get rancid.

The invention relates to the field of biological analysis, and particularly relates to a biological sensing three-dimensional chip and a preparation method thereof. The biological sensing three-dimensional chip provided by the invention has a supporting layer, an anchoring layer, a click modifying layer and a high-molecular brush layer; the anchoring layer is anchored and bonded on the supportinglayer through Au-S bonds or Ag-S bonds; the click modifying layer is bonded on the anchoring layer through covalent bonds; and the high-molecular brush layer is covalently bonded to the click modifying layer by a clicking reaction. In a preparation process, according to the invention, the high-molecular brush layer is constructed by using a method of ''Grafted to'', so that the molecular weight ofthe high-molecular brush is well controlled, and the repeatability of the technical process for preparing the chip and the stability of the quality of the chip are improved. According to the invention, the method of ''Grafted to'' is realized through click chemistry, so that the biological sensing three-dimensional chip having the high-molecular brush layer with a high grafting density is prepared. The biological sensing three-dimensional chip finally prepared by the preparation method provided by the invention has the characteristics of high sample carrying amount and strong specificity.

The invention relates to a bitter masked clarithromycin pellet preparation. The bitter masked clarithromycin pellet preparation comprises a clarithromycin pellet and a coating layer, wherein the mean grain size of the clarithromycin pellet is 180 mu m-220 mu m; the mean thickness of the coating layer is 10 mu m-115 mu m; and the mean grain size of the bitter masked clarithromycin pellet preparation is 200 mu m-410 mu m. Compared with common particles, the prepared product can mask medicine bitterness very well, can reduce sub-packaged amount of medicine, can improve compliance of children and old patients, is convenient to take and improves bioavailability; and on the other hand, the product adopts an advanced technology and is applicable to industrial production, and the stability and quality of the preparation are remarkably improved.

The invention relates to the technical field of geotechnical engineering, and discloses a construction method of a side slope dangerous rock falling blocking structure, which adopts a double-layer cement blanket, a profile steel supporting piece and an anchor rod to form a retaining wall structure of a reinforcing pile well to replace a traditional reinforced concrete retaining wall structure. A single-layer cement blanket, a transverse fixing frame and a vertical fixing frame are adopted to form a concrete construction formwork of a breast board, and a concrete construction formwork of a corresponding part of a reinforcing pile on the ground is adopted, so that a traditional construction formwork is replaced. The construction method is easy to operate, high in construction efficiency, environmentally friendly and low in safety risk, the number of times that constructors enter and exit the site is greatly reduced, the demanded quantity of concrete and the maintenance time of concrete pouring are reduced, the construction cost of the blocking structure is controlled, application and popularization are facilitated, and the construction method is particularly suitable for the high-cold and high-steep slope environment of the plateau.

The invention discloses a preparation method of fun starfish combination. The fun starfish combination disclosed in the invention is prepared by taking natural marine organism starfish as a main raw material, and water-white shrimps, dried scallops, longans, sea coconut and the like as auxiliary materials through the processes of seasoning, cooking, vacuum packaging, quick freezing and freezing preservation. The prepared product has the advantages of unique interestingness, convenience in eating, delicious flavor and high nutritional value and has the efficacies of warming vigour, building body and the like. According to the invention, the natural starfish with extremely high medical value, rich resources and attractive appearance is fully utilized to be combined with other auxiliary materials, so that the defects of single utilization of the starfish resources, inconvenience in carrying, short storage period and the like are overcome, moreover, the production technology is simple andenvironmentally-friendly, and the real continuous automatic clean production is realized.

The invention provides particle surface treatment equipment. A pressure pneumatic conveying system with material circulation is taken as a particle fluidizer which is adopted for performing fluidization and surface treatment to particles. The particle surface treatment equipment comprises a gas feed device which is connected with a material feed device, wherein a first gas inlet and a second solid particle inlet are formed in the material feed device, and the gas feed device is connected with the first gas inlet of the material feed device. The outlet of the material feed device is connected with a conveying pipeline serving as a fluidizing chamber of the fluidization and surface treatment equipment; the conveying pipeline is provided with a spraying device and an atomizing nozzle which are connected with each other; the downstream of the conveying pipeline is connected with a material discharge device; a gas outlet and a solid particle outlet are formed in the material discharge device. The gas feed device is used for supplying the equipment with gas for particle fluidization; the material feed device is used for supplying to-be-treated particles for the equipment and conveying the gas and solid particles into a downstream pipeline. In the fluidizing chamber of the downstream conveying pipe, the particles, atomized components and gas are intensively mixed and fluidized and subjected to surface treatment. The solid particle outlet of the material discharge device and the second solid particle inlet of the material feed device form a passage through a discharge device; the material particles are intensively mixed in a circuiting loop pipeline and are in a fluidized state.

The invention relates to the field of forging die clamps, in particular to a rotary forging die clamp for clamping roller forging dies or other untraditional upright dies, and a surface processing method of the rotary forging die clamp. The problems that an existing clamp cannot effectively and stably clamp the untraditional upright dies, fixing and clamping are difficult, production efficiency isreduced, the dies bear uneven force, workpieces easily shake in the production and machining process, the machining dies deviate from the original requirements, the halving and leveling process is quite complicated for operators, and the quality cannot be ensured are solved. By means of the technical scheme, the rotary forging die clamp comprises a body and fixed clamping grooves. The fixed clamping grooves are formed in the two ends of the body in the length direction. An arch base is arranged on one bottom face of the body and provided with a curved surface. The curved surface is bent in the length direction of the body. At least two fastening devices are symmetrically arranged on the arch base. A positioning inclined surface is arranged at the end, extending in the length direction ofthe body, of the arch base, and a positioning block is oppositely arranged at the other end of the arch base.