50results about How to "Invention effect is obvious" patented technology

The invention discloses a method for realizing the machining of combustion-compression ring bushes by using a combustion-compression ring bush cutting clamp, relating to a machining method for ring parts. The invention aims to solve the problems that because the existing combustion-compression ring bush is a thin-walled workpiece, the existing combustion-compression ring bush is easy to deform in the process of machining, so that the machining quality of the combustion-compression ring bush is affected, and meanwhile, the 30-equated positions of 30 molded holes of a combustion-compression ring bush machined by using the existing machining method are poor in accuracy. The clamp used in the invention comprises a base plate, a turntable, two positioning pins and four pressing plates. The method disclosed by the invention comprises the following steps of: 1, roughly turning an inner hole, an outer circumferential surface and two planes of a blank; 2, relieving stress of a semi-finished combustion-compression ring bush product; 3, carrying out finish turning on an inner hole, an outer circumferential surface and two planes of the semi-finished combustion-compression ring bush product; 4, drawing center position lines of radial holes and molded holes; 5, drilling 30 radial holes with a diameter of 5 mm; and 6, cutting and machining 30 molded holes. The method disclosed by the invention is used for machining combustion-compression ring bushes.

The invention discloses a high-hardness, high-wear-resistant and anti-fingerprint ultraviolet-curable coating. The coating comprises the following ingredients (by weight): organic fluorine modified urethane acrylate, nano-particle hybrid silicone modified urethane acrylate, high-functionality acrylate oligomer, a photoinitiator, a macromolecular photocuring aid, a diluent and an auxiliary agent. By using the nano-particle hybrid silicone modified urethane acrylate having high hardness and high wear resistance as the matrix resin in cooperation with the organic fluorine modified urethane acrylate having fingerprint fouling resistance and the high-functionality acrylate oligomer capable of increasing crosslinking density, and by adjusting the combination of the photoinitiator while adding the macromolecular photocuring aid in the formula, the ultraviolet-curable coating which has high hardness, high wear resistance and excellent anti-fingerprint effect and can be used for transparent plastic boards is developed. Thereby, the problem that a common coating has low hardness, poor wear resistance and poor anti-fingerprint effect is solved.

The invention discloses a criterion method for the protection startup of an extra-high voltage direct-current circuit according to a polar wave change rate. The method comprises the following steps of: when the direct-current circuit fails, determining a polar wave according to direct-current voltage and current measured at a protection installation position, wherein the sampling rate is 10 kHz and the time window is 5 ms; performing one-dimensional wavelet decomposition on the polar wave by using a db4 wavelet of a Daubechies wavelet system to obtain modulus maximums, and selecting a first modulus maximum serving as a voltage change rate startup criterion, wherein the electric quantity used by the criterion has high polar wave representation discrimination and is easy to judge; and performing one-dimensional wavelet decomposition on a fault signal by using the db4 wavelet of the Daubechies wavelet system, so that the influence of noise can be eliminated to a great extent. As proved by a large quantity of emulation results, the criterion method has a good effect.

The invention discloses a flying shear device for finishing and shearing of thick metal strips. The flying shear device mainly comprises a main driving device, a shearing device and a cutter clearance adjusting device. A main driving motor is connected with a shearing eccentric shaft through a speed reducer and a coupling, lower ends of two shearing links are mounted on the shearing eccentric shaft, upper ends of the two shearing links are fixedly connected with a lower shear holder, a lower cutter is fixed on the lower shear holder, an upper cutter is fixed on an upper shearing clamp, the upper shearing clamp is fixed on a base, and the cutter clearance adjusting device is used for adjusting clearance between the cutters. The flying shear device can realize high-speed continuous shearing operation. Compared with a general flying shear, the flying shear device has the advantages that the shearing speed of the flying shear device is increased by two to three times, the shearing precision is increased by two to four times, and shearing burrs and curls are eliminated thoroughly.

The invention discloses a tracking plate shearing machine for transverse plate shearing and belongs to the field of metal plate shearing machinery. The tracking plate shearing machine comprises a shearing and walking device, an extensible belt device and a turnover belt device, wherein a driving system of a walking device of a shearing mechanism adopts a structure that a servo motor is matched with an accelerating air cylinder, a load is reduced during starting, starting is quick, the air cylinder absorbs inertia during returning, and positioning of a parking position is accurate. Extensible belts move with a shearing mechanism, receive sheared plates and ensure plate surface quality. The multiple extensible belts are driven simultaneously and can be independently tensioned. When a turnover belt normally works, the turnover belt is horizontal and immovable and downwards turns over during air cylinder action when a sample is needed to be taken, offline material taking is achieved, a unit is not needed to shut down, and the working efficiency is improved.

The invention discloses a method for improving coercive force of a rare-earth permanent-magnet, which is characterized in that in the process of manufacturing the rare-earth permanent-magnet, other rare-earth oxides except DyO and TbO are added into and fully mixed with prepared powdered alloy, and then the mixture is molded in an oriented way and sintered; and the added rare-earth oxides are NdO and/or GdO, and are treated by dehydration at the temperature of over 500 DEG C, and the doping proportion is 0.8-3.2% of the weight of the prepared powdered alloy. The rare-earth oxides with lower price are added into the prepared powdered alloy, and other processes are not changed, serial tests prove that when about 0.8% of rare-earth oxides are added, the coercive force is increased by 1900-3900KOe, and the remanence of the product is reduced by 200-300Gs. When the adding proportion is more than 1.6%, the remanence of the product is reduced, and the significance is significantly lowered. The method has simple technique, lower cost and remarkable effect.

The invention discloses a method for improving strength of polyacrylonitrile-based carbon fibers. The method comprises the following steps: enabling polyacrylonitrile-based carbon fibers to immediately enter an environment with controlled temperature and humidity after tows are discharged out of an oxidizing furnace and a low-temperature carbonized furnace, so that a series of moisture absorptioneffects generated after the tows enters the humid environment are avoided; and enabling moisture absorbed after the tows enter the opening of the low-temperature carbonized furnace to be instantaneously gasified and bound to carbon atoms in the fibers, and releasing CO and other gases, so that defects or holes are reserved on the surfaces of the tows or inside the tows, and the strength and otherperformances of the fibers are reduced. According to the method disclosed by the invention, fluctuations brought to the strength and other performances of the carbon fibers due to changes of the temperature and humidity of the environment can be avoided, so that the prepared carbon fibers have excellent performances such as small quantity of holes, uniform quality, low discrete property, high strength and the like.

The invention provides a parallel calculation device and system based on DSP; the device comprises: A display control unit that is composed of the first DSP and the first microprocessor connected with the first DSP, the first programmable control logic element, a display monitor and at least two communication interfaces; a parallel exchange unit that is composed of the second DSP and the second microprocessor connected with the second DSP, the second programmable control logic element and at least three communication interfaces; an arithmetic unit that is composed of the third DSP and the third programmable control logic element connected with the third DSP, storages and communication interfaces; moreover, one communication interface of the parallel exchange unit is connected with one communication interface on the display control unit; the other two communication interfaces on the parallel exchange unit are respectively connected with the communication interfaces on the two the arithmetic units. The invention aims at resolving the problems of high cost, large occupied area and high power consumption in parallel calculation devices.

The invention provides a preparation method for a polyacrylonitrile-based carbon fiber protofilament. The third monomer of a spinning raw material, i.e., polyacrylonitrile resin, is itaconic acid; a spinning solution is prepared from the resin by using DMSO or DMAc, and spinning and solidification are carried out so as to prepare a nascent fiber. The nascent fiber successively undergoes the following procedures: drip washing with deionized water; dipping in an acidic aqueous solution for 2 to 10 min; dipping in a sodium hydroxide or potassium hydroxide aqueous solution for 1 to 5 min; water bath drafting in pure water; dipping in the acidic aqueous solution for 2 to 8 min; and rinsing with deionized water until rinsing liquid is neutral. A carbon fiber protofilament is prepared by subjecting the nascent fiber to post-processing procedures like oiling and dry densification. According to the invention, purification of the protofilament is realized through rinsing, and breaking strength of fibers is not affected, so the defects of the prior art are compensated.

The invention discloses a blast furnace copper cooling plate water leakage inspection method and an online cutting and blocking method. Firstly, the water leakage direction is determined according to the temperature tendency of a furnace body thermocouple and the single-direction flow meter fluctuation tendency of a cooling system, ignition is conducted according to the exhausting and breathing situation, and water leakage string copper cooling plates are determined; and finally, a specific water leakage copper cooling plate is determined in the water leakage string copper cooling plates. According to the blast furnace copper cooling plate water leakage inspection method and the online cutting and blocking method, through the water feeding and retreating valve water closing examination, whether the copper cooling plate is damaged or not is judged, if no breathing phenomenon exists in a valve, it is shown that cooling equipment is in good condition, and if breathing of an exhaust valve happens, it is shown that the cooling equipment is damaged, confirmation is achieved through assistance of ignition of outer coal gas, a specific string and a specific block are sought, industrial water circulates through changing for serious damage, and the water leakage amount is controlled. The specific cooling plate is sought firstly, then judgment of an inner cavity and an outer cavity is conducted, and through the outer metal hose connecting manner change, online dismounting and cutting and blocking are conducted. By means of the blast furnace copper cooling plate water leakage inspection method and the online cutting and blocking method, an inner channel and an outer channel of the damaged copper cooling plate can be rapidly sought and cut away, a large amount of cooling water is prevented from leaking into a furnace, and the service life of the blast furnace is prolonged.

The invention relates to a method for recognizing lightning interference by utilizing an average sampling value of a short-window inner polar wave, comprising the steps of: after a protection element starts, solving polar wave voltage according to polar line voltage and polar line current which are obtained through measurement at a relay installed place and according to formulas; directly utilizing the sampling values of the polar wave voltage and the steady-state polar line voltage in a short window; solving a ratio of the polar wave voltage to the polar line voltage which runs in a steady state; and recognizing the lightning interference by utilizing the size of the ratio, wherein the sampling frequency is 10kHz, the time widow is 5ms, the sampling is not influenced by a control system,and the time-delay protection is in a ms level. By utilizing the method, the lightning interference in a full-length range of a line can be accurately recognized. The method has good robustness, verystrong performance of tolerating a transition resistance and stronger practicality and is not influenced by the interference. Proved by vast simulation results, the method provided by the invention has good effect.

The invention discloses a synthetic method for thiophosphate. The synthetic method comprises the following steps: after taking thiophosphate aqueous liquor and methyl chloroacetate as raw materials to carry out primary reaction on thiophosphate and methyl chloroacetate, separating to obtain an oil phase and a water phase, carrying out continuous cyclic synthesis by virtue of the following two-step reaction: a first step, namely adding methyl chloroacetate into a water phase, reacting, and after reacting, separating to obtain oil phase of thiophosphate-containing methyl chloroacetate and water phase capable of being subjected to posttreatment and exhausted, and a second step, namely adding thiophosphate aqueous liquor into the oil phase of thiophosphate-containing methyl chloroacetate to react, and after the reacting, separating to obtain the oil phase containing thiophosphate and excessive methyl chloroacetate and the water phase, wherein methyl chloroacetate is separated from the oil phase containing thiophosphate and excessive methyl chloroacetate by virtue of distillation to obtain the thiophosphate, and circulating the water phase to the first step. The synthetic method is high in yield, short in synthesis time and low in cost, capable of effectively utilizing various raw materials and products and lowering the content of the thiophosphate in wastewater, and environmentally friendly.

The invention provides a preparation method for a polyacrylonitrile-based carbon fiber protofilament. The third monomer of a spinning raw material polyacrylonitrile resin is itaconic acid. The preparation method comprises the following successive steps: preparing a spinning solution from the resin by using an aqueous solution of NaSCN and carrying out spinning and solidification so as to prepare a nascent fiber; placing the nascent fiber in the aqueous solution of NaSCN for water bath drafting and carrying out drip washing with deionized water; dipping the nascent fiber in an acidic aqueous solution; dipping the nascent fiber in a sodium hydroxide or potassium hydroxide aqueous solution; placing the nascent fiber in pure water for water bath drafting; subjecting the nascent fiber to hot bath rinsing until rinsing liquid is neutral and sodium or potassium ions cannot be measured, and then continuing rinsing for 5 to 15 min; and carrying out post-processing procedures like oiling and dry densification on the nascent fiber so as to obtain a product of the polyacrylonitrile-based carbon fiber protofilament. According to the invention, purification of the protofilament is realized through rinsing, and breaking strength of fibers is not affected, so the defects of the prior art are overcome.

The invention relates to a continuous rapid drying device for grains and belongs to the technical field of drying. The continuous rapid drying device structurally comprises a feed system, a heating section and a discharge system, all of which are orderly connected with each other; the feed system comprises a cone-shaped feed bin and a feeder; the heating section is composed of two or more than two sections of horizontal pipes which are arranged up and down from high to low and connected in series with each other; all the sections of horizontal pipes are basically the same in structure, each section of horizontal pipe is an elongated cylinder of which the two ends are sealed with seal covers, and the part between a feeding hole and a discharge hole of the elongated cylinder is horizontally arranged in the hollow part of an elongated interlayer heat source box; a copper screw rod which is as long as a lower circular-arc-shaped groove is built in the elongated cylinder; the discharge system is composed of a receiving valve and a receiving container. The continuous rapid drying device for grains is used for drying the grain raw materials in such a manner of directly heating by use of a modified screw propeller; the continuous rapid drying device is reasonable in structure, ingenious in design, and also capable of realizing accurate temperature control and thus suitable for drying various grain raw materials relatively high in moisture content.

The present invention discloses a stability condition numerical solution calculating method and system for a standard linear solid model. The method comprises: constructing the standard linear solid model; determining a state transfer matrix of stability conditions of model finite difference solution; acquiring a plurality of groups of parameter sets, and enabling each group of parameter sets to comprise an elastic coefficient of a first elastomer, an elastic coefficient of a second elastomer, a viscosity coefficient of a damper, a frequency and a medium density; under set spacial differential accuracy and spacial mesh step, sequentially utilizing each group of parameter sets and carrying out calculation by a computer to enable a module of a feature value of the state transfer matrix to be smaller than a time step of 1; and determining the time step as a numerical solution. According to the stability condition numerical solution calculating method and system disclosed by the present invention, the time step which is more aligned with standard linear solid model numerical simulation of an actual viscoelastic medium can be quantitatively determined; after the time step is determined, numerical simulation based on the standard linear solid viscoelastic medium can be guaranteed to be successfully completed; the efficiency is ensured; the cost is saved; and finally, geological problems in an actual seismic exploration are solved by applying a simulated result.

The invention relates to a method for inhibiting pipeline valve cavitation erosion, and belongs to the field of cavitation prevention of hydraulic engineering. In order to solve the cavitation and cavitation erosion problem of a water conveying valve in a hydraulic type boat lifter, the invention discloses a ventilating method capable of effectively inhibiting pipeline valve cavitation erosion. The ventilating method comprises the following steps of: designing a basic ventilating body form; obtaining ventilating amount needed for reducing cavitation through a decompression model test; arranging an air vent in an upstream water tube section of the valve according to the test results; and verifying main frequency loss generated by cavitation through a hydrophone. The method has the advantages that: firstly, ring-shaped ventilating measures are adopted, and aerification range is wide; secondly, aerification is performed before the valve, and aerification water flow passes through a valve runner and is sufficiently mixed, so that air bubbles are dispersed to be smaller, aerification amount is uniform, the air bubbles can be packaged better, and energy of air bubble collapse is absorbed.

The invention relates to an emulsion composition for improving the color of MBS resin powder. The emulsion composition comprises oil-phase components and water-phase components, wherein the oil-phase components comprise an antioxidant, an ultraviolet absorber, a heat stabilizer, a fluorescent brightener and an organic solvent, and the water-phase components comprise an emulsifier and water. When the emulsion composition is used, homogeneous emulsion dispersion is prepared by using a high-speed mechanical mixing manner, and the emulsion composition is added to an MBS resin emulsion in a coagulation process, so that the initial color and heat resistance of resin can be greatly improved. The emulsion composition presents complementary and synergistic effects of different aids for improving the same physical property of MBS resin, and has an excellent using effect.