39results about How to "Solve the size problem" patented technology

The invention relates to the field of manufacturing vanadium cells, in particular to a method for manufacturing a high-conductivity conductive plastic bipolar plate for the vanadium cell. The method comprises the steps of: uniformly mixing a conductive plastic raw material in a high-speed mixing machine, mixing through a double-screw extruder to manufacture master batches, adding the manufactured master batches to a single-screw extruder, and carrying out extrusion molding through the single-screw extruder to manufacture a conductive high-molecular-material collector plate. According to a bipolar plate meeting technique requirements, temperature-resistant resin and a conductive filler are selected, pelletized by the double-screw extruder, and extruded by the single-screw extruder to manufacture a high-strength, anti-corrosion and high-temperature-resistant plastic bipolar plate; and the resistivity of the manufactured high-strength, anti-corrosion and high-temperature-resistant plastic bipolar plate can reach 0.1-0.5 omega per centimeter so as to meet an application index of the vanadium cell. The bipolar plate manufactured by the method disclosed by the invention can be rather thin, has the advantages of large area, good continuity and low cost, and also has the advantages of being capable of reducing the cost of the vanadium cell, ensuring stable operation in cells without releasing chemical groups, and maintaining stability and reliability of an electric pile of the vanadium cell.

The invention discloses a partial discharge detection system for transformer slot leak electromagnetic waves and method. The system is composed of a signal source generation device arranged inside thetransformer for generating electromagnetic waves, an electromagnetic wave receiving device arranged in the slot of the transformer for receiving the electromagnetic waves, and a data acquisition device connected with the electromagnetic wave receiving device for acquiring electromagnetic wave signals received by the electromagnetic wave receiving device. In the method, a PD pulse source is adjusted through a control device to output PD pulse signals, electromagnetic wave signals in or inside the power transformer slot are acquired through an antenna sensor and an oscilloscope, and thus, detection on the transformer slot leak electromagnetic waves is completed. The power transformer slot leak PD electromagnetic wave signals can be effectively detected, and a strong support is provided forresearch on an electromagnetic wave distribution law in (inside) the transformer slot.

The invention discloses a driving unit modularization stick-slip driving positioning platform which comprises a movement output micro-positioning platform, a platform base and a driving unit module arranged inside the platform base. The driving unit module comprises a module frame, a driving source and a guiding driving element, wherein the driving source is arranged inside the module frame, and the guiding driving element is connected with the driving source and is a flexible hinge. The guiding driving element is perpendicular to the movement output micro-positioning platform. The top of the guiding driving element makes direct contact with the movement output micro-positioning platform. The stick-slip effect is generated between the guiding driving element and the movement output micro-positioning platform, displacement is directly output, the precision is high, and the response speed is high; due to the modularized design, the platform base and the friction adjusting mechanism are greatly simplified, and the machining and manufacturing requirement of the whole positioning platform is lowered.

The invention provides a preparation method of polycrystalline zinc selenide. The preparation method comprises the following steps that the surface of a polycrystalline zinc selenide sheet with the thickness of 30-50mm is treated to obtain a zinc selenide polished wafer with the roughness being less than Ra20, the zinc selenide polished wafer is cleaned with plasma, and the cleaned zinc selenide polished wafer is put on a graphite substrate; step 2, the zinc material is installed in a crucible; step 3, a graphite substrate depositor is mounted on a graphite crucible and then put in a chemical vapor deposition vacuum furnace; step 4, argon is introduced into the chemical vapor deposition vacuum furnace at room temperature; step 5, the crucible is heated, and the graphite substrate depositor is heated; step 6, the zinc starts to evaporate, hydrogen selenide gas carried by the argon is introduced into the graphite substrate depositor, and argon is introduced into the crucible; and step 7, after zinc evaporation is finished, introducing of the hydrogen selenide gas is stopped, the crucible is cooled, the graphite substrate depositor is cooled, and the final polycrystalline zinc selenide with the overall thickness of 60-100mm is obtained after being discharged from the furnace. According to the invention, the thick polycrystalline zinc selenide material can be prepared.

The invention discloses a preparation method of a foamed aluminum sandwich panel based on friction stir welding connection. The preparation method comprises the following steps that (1) two foamed aluminum sandwich panel preforms are prepared; (2) surface treatment is carried out; (3) the end faces, perpendicular to the horizontal plane, of the two surface-treated preforms are in butt joint; (4) friction stir welding is carried out, the rotating speed of a stirring needle is 400-1200 rpm, and the welding speed is 100-200 mm/min; and (5) the welded preforms are put in a heating furnace to be foamed. The method can be used for preparing the foamed aluminum sandwich panel welding preforms with high panel bonding strength and can be used for preparing the foamed aluminum sandwich panel large in size, high in overall expansion rate, good in panel flatness and good in sandwich foam hole continuity; and the method is simple in process route and can be used for large-scale production.

The invention discloses a spraying-free POM composite material with low warpage and high dimensional stability and a preparation method of the spraying-free POM composite material. The spraying-free POM composite material with low warpage and high dimensional stability specifically comprises the following raw materials in parts by weight: 40-80 parts of POM resin, 1-5 parts of a dispersing agent,2-5 parts of an anti-aging auxiliary agent and 8-25 parts of functionalized masterbatches. The functionalized masterbatches comprise the following components in percentages by weight: 3-15 parts of anelastic ionomer, 2-10 parts of graphene oxide and 3-8 parts of metal toner. Through high-efficiency masterbatch predispersion of the elastic ionomer with high impact resistance modification effect, agraphene oxide sheet layer and the metal toner, the obtained POM composite material has a good surface spraying-free effect, on that basis, the problem of dimensional stability of POM with large forming shrinkage and easiness in warpage is obviously solved, the warpage of prepared sample plates with different wall thicknesses is reduced to be about 1/4-1/5 of that of a conventional material in ahigh-temperature and long-period testing environment, and moreover, by the high-efficiency composite masterbatch modification mode, the negative influence of the addition of the an elastomer toughening agent on the rigidity and heat resistance of the material can be effectively compensated.

The invention provides a flight control simulator tensile and compressive load testing system field calibration device which comprises a structural framework, a loading mechanism, a standard measurement unit, an upper computer and a fine adjustment mechanism. The loading mechanism, the standard measurement unit and a calibrated force sensor are sequentially connected and then installed on the structural framework. The fine adjustment mechanism supports the loading mechanism, and through fine adjustment of the position of the loading mechanism, the loading mechanism, the standard measurement unit and the calibrated force sensor are located on the same straight line. The standard measurement unit and the upper computer are wirelessly connected. The calibrated force sensor and a flight control simulator are connected.

The embodiment of the invention discloses a shape correcting device. The shape correcting device comprises a square frame, a positioning block and an adjusting piece; each border of the square frame is matched with one adjusting piece; the adjusting piece penetrates through the border corresponding to the adjusting piece and abuts against the bottom face of the positioning block; and the top surface of the positioning block is used for extruding a workpiece to be subjected to shape correction when the adjusting piece is pushed.

The invention discloses a soft claw mandrel adjuster. The soft claw mandrel adjuster comprises a supporting adjuster, a locking screw (1), a supporting rod (2) and a barrel body (3), one end of the barrel body (3) is closed, the other end of the barrel body (3) is provided with a cylindrical cavity (4), the closed end of the barrel body (3) is provided with a through hole (5) communicating with the cylindrical cavity (4), the cylindrical surface of the barrel body (3) is uniformly provided with three guide holes (6) communicating with the cylindrical cavity (4) in the circumferential directionof the cylindrical surface, the cylindrical surface of the barrel body (3) is further provided with a threaded hole (7) communicating with the cylindrical cavity (4), the supporting adjuster comprises a rotating shaft (8), an impeller (9) and a guide wheel (10), and the impeller (9) is composed of three blades which are in an equilateral triangle and fixedly arranged on one end face of the guidewheel (10). The soft claw mandrel adjuster has the beneficial effects that the structure is compact, the use is convenient, the size can be adjusted, the production preparation time can be shortened,and customized management can be facilitated.

The invention relates to a cutting and separation head for manual ceramic cutters, comprising: a body (3) that carries a grip handle (5) and a cutting tool (6), is mounted on movable supports (2) on longitudinal guides of the cutter (C), and is able to rotate with respect to a first transverse rotary shaft (4); a separator provided with a foot (7), a class 1 lever (8), and a first coupling element (10) in the separator that is couplable to a second coupling element (12) in the body (3) of the head (1); and a cam (13) for releasing the first and second coupling elements (10, 12), the cam being mounted on the body (3) and relatively rotatable between a first position and a second position.