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82results about How to "Good structural strength" patented technology

Moulding method of variable-density broadband wave-transparent quartz composite ceramic antenna housing body

ActiveCN104446584AGood structural strengthImprove impregnation composite effectBroadbandVariable density
The invention discloses a moulding method of a variable-density broadband wave-transparent quartz composite ceramic antenna housing body. The method comprises the following steps: according to dimension and quality request of the housing body, integrally weaving an outer material and an inner material to obtain an inner and outer housing body fabric; putting the housing body fabric in water to be cooked and soaking in acid liquor; then, putting the housing body fabric in an utensil filled with a silica sol for dipping and compounding; and finally machining a housing body blank to a required dimension to obtain the antenna housing body. According to the moulding method disclosed by the invention, the outer layer of the housing body fabric is woven by quartz fiber yarns, so that the volume percentage of the quartz fiber yarns is 40-45% while the inner layer of the housing body fabric is woven by hollow quartz fiber yarns, so that the volume percentage of the hollow quartz fiber yarns is 25-30%, therefore, the fiber volume percentages of the inner and outer layers of the housing body fabric are different. Meanwhile, the inner and outer layers are integrally attached and woven, the layering problem is avoided, and the housing body has relatively good structural strength is powerfully guaranteed as a result of relatively good strength of a reinforcement.
Owner:湖北三江航天江北机械工程有限公司

Preparation method of carbon fiber reinforced carbon-silicon carbide dual-ceramic based gradient composite material

The invention discloses a preparation method of a carbon fiber reinforced carbon-silicon carbide dual-ceramic based gradient composite material. The preparation method is characterized by comprising the following steps: (a), carrying out thermal treatment onto the fibers by adopting different temperatures; (b), dipping the fibers which are not subjected to thermal treatment and the thermally-treated fibers obtained in the step (a) in resin glue liquor, drying, continuously superposing and laying up, applying a certain pressure after laying up, and carrying out curing and post-curing treatment in sequence to prepare a composite material biscuit body with fiber/base body interface adhesive strength in gradient change; (c), carrying out high-temperature pyrolysis onto the composite material biscuit body obtained in the step (b) to obtain a carbon/carbon porous body with porosity in gradient change; (d), carrying out liquid silicon permeation onto the carbon/carbon porous body obtained in the step (c) under a high temperature to obtain the C/C-SiC composite material with SiC ceramic base body content in gradient change. The preparation method disclosed by the invention is simple in process, short in preparation period, low in cost and capable of preparing a large workpiece with a complex shape.
Owner:DALIAN UNIV OF TECH

Double-side-wall composite cross method construction method for large-span tunnel under complex geological condition

The invention provides a double-side-wall composite cross method construction method for a large-span tunnel under the complex geological condition. The double-side-wall composite cross method construction method is used for solving the technical problems that during construction of a soft rock large-span tunnel, arch crown settlement is not easy to control and a support structure is prone to deforming, optimizing structural force, improving construction convenience and determining construction safety. According to the double-side-wall composite cross method construction method, pilot tunnelson the two sides are constructed firstly, and primary support side wall foundations are constructed in the pilot tunnels to serve as a bearing foundation of an upper primary support system, so that the problems that during construction of the soft rock large-span tunnel, arch crown settlement is not easy to control and the support structure is prone to deforming are solved; bases only serve as thebearing foundation of primary support, under the premise that the stability of the arch wall primary support system is guaranteed, an arch wall secondary lining can still be constructed through an integral formwork trolley, the technique is simple and convenient, the integrity of the secondary lining is guaranteed, the waterproof effect is good, and the construction quality is controllable; and the pilot tunnels on the two sides adopt the excavated section of an arc-shaped arch crown, compared with conventional pilot tunnels constructed through a double-side-wall heading method, the structureforce is more excellent, construction is convenient, and the construction quality of the support system is easy to ensure.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD

Manufacturing process of propeller and large efficient blade propeller of fan

The invention discloses a manufacturing process of a propeller and a large efficient blade propeller of a fan. The manufacturing process comprises the following steps: preparing a necessary propeller manufacturing external die and a polystyrene cystosepiment preform, wherein the structures of the preform and the propeller to be manufactured are the same, but the size of the preform is reduced by a circle according to a ratio compared with the size of the propeller to be manufactured, and the polystyrene cystosepiment preform is manufactured for bracing the interior of a soft air bag, so that a prepreg can be conveniently paved; after sleeving the air bag outsides the polystyrene cystosepiment preform, integrally paving the prepreg outsides the air bag, and finally manufacturing the needed product by virtue of a single-air bag process or a multi-air bag process. The product has a very compact structure and is very good in structure strength and light in weight; on the aspect of procedure, the product is finished by one time, the procedure is simple, is short in consumed working hour and very high in efficiency and is capable of shortening the working hour by four fifths compared with the conventional method; on the aspect of quality, as the product is integrally finished in the die, the strength of a workpiece is very large, the finished product rate is very high, and the standardization is very good.
Owner:郑伟

Supercritical water oxidation process and catalytic wet oxidation process combined reactor

The invention discloses a supercritical water oxidation process and catalytic wet oxidation process combined reactor. A main reaction tube is vertically arranged in a casing and is fixed by a cover plate flange at an opening of the casing; an upper opening is closed; a frame type sieve plate is circularly arranged between the casing and the main reaction tube inside the casing and is fixed; a catalyst is stored in the frame type sieve plate; a wastewater inlet and an oxygen inlet are formed in the upper part of the main reaction tube; a clear water outlet and a clear water inlet which are respectively formed in the upper side and the lower side of the frame type sieve plate are formed in the wall surface of the casing; the clear water outlet is sequentially connected into a heat exchanger and a circulating pump towards a direction of the clear water inlet; a saline water outlet is formed in the bottom of the casing. According to the reactor disclosed by the invention, a supercritical water oxidation process and a catalytic wet oxidation process are respectively used or are simultaneously and jointly used; supercritical oxidation is performed in the main reaction tube; catalytic wet oxidation is performed outside the main reaction tube; the reactor has relatively-high operation elasticity, provides optimization selection possibility for wastewater treatment with different fields, different concentrations and different treatment requirements and has the advantages of good structural strength, low manufacturing cost and convenience in arrangement; the problem of scale blockage of a supercritical water oxidation reactor due to high-temperature corrosion and salting out is effectively solved.
Owner:JIANGSU KUNZHONG MACHINERY

Aluminum alloy and plastic joint handle and French door and refrigerator comprising same

The invention relates to an aluminum alloy and plastic joint handle and a French door and a refrigerator comprising the same. The joint handle comprises a plastic hidden handle and an aluminum alloy vertical post machined part. The plastic hidden handle is provided with a recessed cavity with which people open or close door bodies. The recessed cavity is arranged in the outer side face of the plastic hidden handle and recessed inwards. The plastic hidden handle is installed on the aluminum alloy vertical post machined part. The French door comprises the two door bodies arranged in parallel. The neighboring sides of the two door bodies are provided with the aluminum alloy and plastic joint handles arranged in symmetry. The aluminum alloy vertical post machined parts are fixedly installed on the neighboring sides of the two door bodies. The recessed cavities of the plastic hidden handles are arranged oppositely. According to the aluminum alloy and plastic joint handle and the French door and the refrigerator comprising the same, the plastic hidden handle is installed on the aluminum alloy vertical post machined part by adopting the plug-in, buckle and screw fixation scheme, or all other reasonable modes, e.g., gluing, clamping hooks and other fixation modes.
Owner:HEFEI MIDEA REFRIGERATOR CO LTD +1

Large-plane vapor chamber of composite wick

The invention relates to a large-plane vapor chamber of a composite wick. The large-plane vapor chamber comprises an upper cover plate and a lower cover plate, wherein the edges of the upper cover plate and the lower cover plate are connected in a sealed mode to form a sealed working medium cavity. The sealed working medium cavity is in a vacuum state and is filled with a liquid working medium. The upper cover plate is provided with a first area and a second area. The first area is close to an evaporation end and is provided with a plurality of first supporting columns which are densely distributed. The second area is provided with a plurality of second supporting columns which are distributed sparsely. Second wicks are arranged in the gaps between the second supporting columns. The lowercover plate is provided with a third area and a fourth area. The dimension of the third area corresponds to that of the first area, and the third area is used for storing first wicks. The dimension ofthe fourth area corresponds to that of the second area, the fourth area is provided with third supporting columns which are distributed sparsely, and the number and distribution mode of the third supporting columns correspond to those of the second supporting columns. By means of the large-plane vapor chamber, the problems that the flowing space of vapor in large-plane vapor chambers is not enough, the heat transfer performance is poor, and the structural strength is poor can be solved.
Owner:WUXI JONES TECH +3

Electrical machine having centrally disposed stator

An electrical generator comprising a stator having stator windings and a rotor having rotor windings. The rotor and the rotor windings extend about the stator windings. The rotor includes an annular rotor housing. On an inside of the rotor housing are mounted the rotor windings. The stator includes an end member with a central member extending therefrom. The stator windings are mounted on the central member. The stator also includes an annular stator housing that extends about the central member, including the stator windings, and the rotor. The end member attaches to the stator housing thereby positioning the stator windings in a central location. The stator housing and the end member enclose the stator windings and the rotor windings therein. The rotor housing further includes a rotor mounting member on an end. The stator housing includes a stator mounting member on an end thereof, and a stator windings mounting member on an opposite end. The stator windings include an exciter field winding and a generator armature winding. The rotor windings include an exciter armature winding and a generator field winding. The exciter armature winding is disposed radially outwardly from and adjacent to the exciter field winding. The generator field winding is disposed radially outwardly from and adjacent to the exciter armature winding.
Owner:TELEFLEX CANADA

Preparation method of lithium thionyl chloride power type battery positive electrode

The invention discloses a preparation method of a lithium thionyl chloride power type battery positive electrode. The preparation method comprises the steps of 1) performing powder material pretreatment; performing material mixing to form a half-dried wet material and performing uniform stirring; putting the half-dried wet material into a banded extruder with the sieving pore diameter of 0.5-1.5mmto be subjected to band extrusion to obtain a strip-shaped material with the length of 1-2cm; putting the strip-shaped material into a centrifuging pelletizing machine to obtain a fine pellet material with the grain diameter of 0.5-1.5mm; and performing vacuum drying on the fine pellet material for 8-10h; 2) putting the fine pellet material on a net: performing smashing on the obtained dried finepellet material into a fine powder material; performing uniform mixing on the fine powder material and an aqueous solvent to obtain a half-dried powder material; and putting the half-dried powder material on a nickel net to be subjected to vacuum drying and fibering; and 3) positive electrode forming: performing rolling by adopting a rolling mill to prepare a positive electrode body with requiredthickness. By processing the wet material through the extruder and the pelletizing machine, the formula materials in the finally prepared positive electrode are more uniform in distribution, and higher structural strength, more developed net-hole structure, no powder falling-off, and more environment friendly and safer production process are achieved, and continuous production operation can be realized.
Owner:武汉孚安特科技有限公司
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