413results about How to "Easy to serialize" patented technology

The invention discloses a flexible circuit board convenient for efficient heat dissipation and mainly used in a high-power LED illumination array, belonging to the semiconductor illumination technical field. The flexible circuit board of an LED illumination array is characterized in that: the circuit board is provided with a flexible substrate, a connection circuit, an insulating film-covered layer, a heat-conducting rubber pad and an LED light source; the connection circuit is arranged on the surface of the flexible substrate; the surfaces of the flexible substrate and the connection circuit are covered with the insulating film-covered layer to form a circuit board module; the LED light source is packaged inside the circuit board module in an array mode; the bottom surface of the flexible substrate is adhered to the surface of the heat-conducting rubber pad. Therefore, the entire flexible circuit board module has certain elasticity and flexibility and can adapt to bending, twisting and crimp deformation of certain strength; moreover, the invention can also be arranged on non-flat surfaces not more than a certain curvature such as a cylindrical surface or a spherical surface. The invention has wider application scope, better heat dissipation performance, less production cost, convenient installation and substantially increased production efficiency.

The invention discloses an electromagnetically-driven spherical robot. The electromagnetically-driven spherical robot is characterized in that the spherical robot comprises a spherical case, and magnets uniformly and annularly arranged at the vertical middle positions on the inner wall of the spherical case, wherein adjacent magnets have opposite pole directions; a main shaft is transversely arranged in the spherical case in a rotary manner, and is fixedly connected with a bracket; at least one group of electromagnetic coils are disposed on the bracket; and each electromagnetic coil group includes two pairs of electromagnetic coils arranged symmetrically relative to the main shaft. The magnetic core of the electromagnetic coils can be controlled to attract and repel the magnets on the inner wall of the spherical case by controlling the polarity of the two electromagnetic coils to change alternately, so that the bracket can be driven to rotate around the main shaft; therefore, the spherical robot can move forwards and backwards based on the electromagnetic stepping principle. Compared with the conventional spherical robot, the electromagnetically-driven spherical robot has the advantages of simple and reliable structure, stable and flexible movement, and high controllability. Meanwhile, the driving manner of the spherical robot is simplified greatly in comparison with the existing spherical robot, thereby improving the utilization rate of the inner space of the spherical robot. Spherical robots with different dimensions can be manufactured according to different purposes, thereby enhancing the bearing capacity of the spherical robot, and facilitating the generation of serial products.

The invention discloses a variable-gradient fractal lattice sandwiched reinforcement phase change heat sink and aims to provide an efficient phase change heat sink which is high in heat exchange efficiency, has certain universality and can be developed in a serialization mode. The variable-gradient fractal lattice sandwiched reinforcement phase change heat sink is realized according to the following technical scheme: reinforcement heat transfer structures are distributed in a phase change heat sink shell in an array; each variable-gradient fractal lattice sandwiched unit takes a variable-gradient V structure as a first-stage reinforcement heat transfer structure (4) according to the heat transfer and heat exchange characteristics of the phase change heat sink; on this basis, at variable-gradient V-shaped ends of the first-stage reinforcement heat transfer structures, the variable-gradient V structures in the same shape are gradually increased to form multiple stages of reinforcement heat transfer structures, and the specific surface areas of the multiple stages of reinforcement heat transfer structures are multiplied in sequence; the first-stage reinforcement heat transfer structures can transfer heat to an area far away from a heat radiation bottom plate rapidly in a reinforcement mode, and the second-stage reinforcement heat transfer structures (5) and the third-stage reinforcement heat transfer structures can transfer heat to phase change material far away from the heat radiation bottom plate rapidly to complete heat exchange.

The invention relates to a method for preparing a minor-diameter carbon nanotube array on the surface of a flaky material, which belongs to the technical fields of nanometer materials and the preparation process thereof. The method comprises the following steps: the nanoparticles including one or more of Fe, Co, Ni, Cu and Mo (active metals) are dispersed on various flaky materials such as a graphitic sheet, magnesia or layered double hydroxide according to the density (10<8>-10<12> grains / cm<2>), then the chemical vapor deposition is performed, and finally, the carbon nanotube array grows onthe flaky surface. The diameter of the nanotube is less than 20 nm in the array. The method is easy to operate, realizes the mass production of the carbon nanotube array and promotes the industrial application.

The invention provides a method for preparing carbon nano pipe arrays on the inner surface of a particle, belonging to the technical field of novel material and novel material preparation. In the method, the active metal components are loaded on the inner surface of the particle, and subjected to reduction or thermal decomposition to obtain a loaded type particle inner surface containing metal nano particles; the loaded type particle inner surface is subjected to chemical vapor deposition, and carbon nano pipe arrays grow up between the particle inner surfaces. By the physical or chemical separation, the carbon nano pipe arrays are separated from the particles, and the carbon nano pipe arrays with high purity are obtained, wherein in the method, the reaction speed and the operational conditions are controlled, the bed density of a reactor is kept between 10 and 1000kg / m<3>, and the carbon nano pipes / particles are in flowing / fluidized states. The method has the advantages of being easily operated, realizing the mass production of the carbon nano pipe arrays and promoting the industrialized application of the carbon nano pipe arrays.

The invention discloses a novel vehicle control unit suitable for a pure electric vehicle. The novel vehicle control unit comprises a power source, a main MCU, an auxiliary MCU, a first signal processing circuit, a second signal processing circuit, a communication module and a power driving circuit; the output end of the first signal processing circuit is connected with the input end of the main MCU, the communication module and the power driving circuit are connected with the output end of the main MCU at the same time, the auxiliary MCU is connected with the main MCU to achieve bidirection communication, the second signal processing circuit is connected with the input end of the auxiliary MCU, and the output end of the auxiliary MCU is connected with the input end of the power driving circuit and the input end of the communication module. In the working process, the main MCU collects signals, calculates and processes the signals and then outputs a corresponding control instruction to a controlled mechanism, the auxiliary MCU collects heartbeat signals of the main MCU in real time, and when the main MCU breaks down, the auxiliary MCU executes the collection control process of the main MCU. Problems of a traditional vehicle control unit in resources, loading capacity, safety monitoring and the like are effectively solved.

A vehicle state signal system is aimed to provide early-warnings to a traffic accident and a vehicle robbery and theft. The system is composed of a microprocessor, a LED driver, a LED display, a MEMS micro-accelerometer, an acceleration / speed converter, a keyboard / key circuit and a power supply, so that the system can automatically display the speed and provide early-warnings to the driver. The high brightness LED tricolor dynamic display can generate difference obvious color and visual effects to win an early-warning time about 0.8~1 second. The invention can improve the vehicle running and parking safety, reduce collision accidents, and is easy to install.

The invention relates to a preparation method of a high-density ITO (indium tin oxide) evaporation target. The method comprises the following process steps: preparing powdery materials, mixing, doping grease, granulating, shaping, degreasing and sintering. By the above steps, the high-density ITO (indium tin oxide) evaporation target is prepared. Through the preparation method provided by the invention, the high-quality high-density ITO (indium tin oxide) evaporation target is beneficial to being sintered in the oxygen atmosphere under the normal pressure or without pressure; a plurality of functional additives are chosen for doping so as to improve the shaping capability and uniformity of the products; the sintering pressure is remarkably reduced, the sintering efficiency is improved and the production cost and the dangerousness are reduced; and, the preparation method provided by the invention is easy to realize continuous and scale production.

The invention relates to an integrated module of a digital high frequency switch electromagnetism heating power source system, which consists of a rectification filter circuit, an inverter circuit, an IGBT driving isolation circuit, an input phase current sampling circuit, an IGBT current sampling circuit, an IGBT driving circuit, a singlechip microcontroller, a power controller, an IGBT temperature detecting circuit, a pan bottom temperature detecting circuit, a serial communication interface, a heating loop, a power source module integral structure. The power control of the power source system integral module adopts a mode for combining frequency modulation and adjustable pulse width, so that power adjustment is smooth and even; the inverter circuit power semiconductor over-current single pulse protection method improves reliability; and when maximum power is output, work frequency greatly reduces heating of the whole machine according to resonance frequency.

The invention provides a compound flexible conductive fabric, a flexible mechanical sensor and a preparation method of the compound flexible conductive fabric. The compound flexible conductive fabricis a flexible fabric with the surface modified by carbon nanotubes; the preparation method comprises the main steps: placing the flexible fabric into a dispersion solution of the carbon nanotubes, andimmersing and drying to prepare the flexible conductive fabric, wherein the immersion time is 15 to 15min, ultrasonic treatment is carried out in an immersion process, the drying temperature is 60 to100 DEG C and the drying time is 1 to 3h. The flexible mechanical sensor is prepared by utilizing the compound flexible conductive fabric. A preparation technology of the compound flexible conductivefabric, provided by the invention, is simple and the cost is low, so that continuous large-scale production can be realized; the flexible mechanical sensor based on the compound flexible conductive fabric, provided by the invention, can be used for simultaneously inducing and distinguishing pressure and a friction force; the sensor has high sensitivity and strong tolerance and is not easy to damage.

The invention discloses a method for preparing a graphene / polymer composite material based on infrared irradiation. The method comprises the following steps: 1) mixing a graphite oxide solution with a polymer solution or polymer emulsion to obtain a mixed solution, casting or spinning, and drying until the weight percentage of the total solvent is less than or equal to 50 percent so as to obtain a composite product; and 2) removing the solvent from the composite product under the irradiation of an infrared heating lamp, and performing reduction reaction of graphite oxide to obtain the graphene / polymer composite material. By the preparation method, the graphene / polymer composite material is prepared under the irradiation of the infrared heating lamp, the process is simple and convenient, the production cost is low, the method is suitable for large-scale industrial production, different polymers can be selected for preparing different graphene / polymer composite materials so as to meet the production and use requirements, and the graphene / polymer composite material has a wide application prospect in the fields such as conductive polymer composite materials, films and fibers.

The invention relates to a multifunctional control device of a wind power generator based on an integrated gate commutated thyristor (IGCT). The invention mainly aims solving the technical problems that an existing high-power power electronic device is very easy to generate overheating phenomenon and further causes failure of the device. The technical scheme of the invention is as follows: the multifunctional control device of the wind power generator based on the integrated gate commutated thyristor (IGCT) comprises a converter on the side of the power generator, an over-voltage protection circuit, the converter on the side of a power grid, a synchronizing grid connection switch, a controller of the synchronizing grid connection switch, a filter, the controller of the converter on the side of the power grid, a man-machine interface controller and the controller of the converter on the side of the power generator, wherein the left access end of the converter on the side of the power generator is connected with external joints X, Y and Z through an inductor L1, the inductor L2, the inductor L3, a circuit breaker DL2, the circuit breaker DL3 and the circuit breaker DL4, and the external joints X, Y and Z are connected with winding joints U1, V1 and W1 of a rotor of the wind power generator.

The invention discloses an LED light source with a heat dissipation device and a processing method thereof, relating to an LED light source. The conventional LED light source has low heat dissipation efficiency, large size, heavy weight and more production procedures. The LED light source comprises a base, a plurality of LED chips arranged on the upper surface of the base and an electrode lead-out region which is convenient to connect a driving power supply. The LED light source is characterized in that a convex rib is arranged at the lower part of the base in an extension way, a heat radiation tank is arranged in the middle of the convex rib, an LED chip supporting body is arranged at the upper part of the base, and the heat dissipation device is arranged at the lower part of the base. Differing from an LED light source and heat dissipation device split structure in the prior art, the invention prevents the thermal resistance between the LED light source and the heat dissipation device from generating, greatly improves the heat dissipation efficiency because heat generated during the working process of the LED chips is directly transferred to heat dissipation fins through the base and heat resistance layers, such as an adhesion layer, and the like is not arranged between the LED light source and the heat dissipation device, improves the heat dissipation and the quality of an LED lamp, reduces the size of a lamp body for accommodating LEDs, and can ensure that the product is standardized and serialized, and has less working procedures and high processing efficiency.

The invention relates to the detection of tripolycyanamide, in particular to a method and a device for detecting tripolycyanamide. The method comprises: preprocessing a sample to be detected to remove proteins; allowing obtained clear liquid to pass through an anionic and cationic ion exchange series column at a constant flow rate; transferring the clear liquid to be detected and buffer solution into a cell for samples to be detected; inserting an ion selective electrode modified by a molecular imprinted polymer into the cell; generating an electric potential signal; and determining the tripolycyanamide content of the sample to be detected by using an electric potential value according to a standard curve. In the device, one end of the anionic and cationic ion exchange series column, a second flow injection device and a container for the samples to be detected are connected with a three-way valve respectively; the other end of the anionic and cationic ion exchange series column is connected with an ultramicropore protein filter through a first flow injection device; and the second flow injection device is connected with a buffer solution tank; and the ion selective electrode modified by the molecular imprinted polymer is inserted into the container for the samples to be detected. The method and the device have the advantages of high flexibility, low operation cost, suitability for in-situ monitoring and the like in the detection of tripolycyanamide.

The invention relates to a para-hydroxybenzoic acid continuous production technique by a liquid-phase method, belonging to para-hydroxybenzoic acid production techniques. According to the invention, phenol and potassium hydroxide are subjected to salification reaction, subjected to carboxylation reaction with carbon dioxide, and acidified with concentrated sulfuric acid to obtain the para-hydroxybenzoic acid product. The technique comprises the following steps: reaction: proportioning a potassium hydroxide solution, phenol and a solvent, and adding into a salification reaction kettle to carry out salification reaction, thereby obtaining potassium phenate; filtering: sending the material containing solid para-hydroxybenzoic acid to a centrifugal machine, separating, washing with water to obtain the solid para-hydroxybenzoic acid, and drying to obtain the para-hydroxybenzoic acid; extraction and recycling: sending the filtrate obtained in the filtering step and a washing solution to an extraction column, and extracting with an extractant in the extraction column; and potassium sulfate preparation: drying the wet material with a continuous evaporator to obtain the potassium sulfate product. The invention has the advantages of high unit volume productivity, easy control on production, less environmental pollution, shorter technical process and low production equipment investment, and can easily implement continuous production.

The invention relates to a parallel-connection three-dimensional force sensor with a decoupling structure, belonging to the technical field of sensors. The sensor consists of a fixed base 1, a force measurement platform 2 and three branches which connect the fixed base and the force measurement platform, wherein the fixed base 1 is fixedly connected with three force-sensitive inductive elements 6, 10 and 14 and connected with each branch through a revolving pair, the force measurement platform is connected with each branch through the revolving pair, each branch is formed by connecting the three revolving pairs in series, three revolving pair axes forming the same branch are parallel with each other, the revolving pair axes among different branches are perpendicular to each other in space, and the force signal detected by the force-sensitive inductive element of each branch has the same direction with the revolving pair axes of the branch. The sensor can sense special three-dimensional information, has symmetrical structure, simple manufacture and dimensional decoupling, is formed by assembling separative elements, is convenient for realizing seriation, and can be applied to various fields, such as robots, aerospace, athletic sports, and the like needing for three-dimensional force measurement.

The invention discloses an intelligent variable speed driving device and an electrically controlled energy and management system of a hybrid electric vehicle, relates to the innovation of a power coupling mode of the key technology of new energy energy-saving automobiles, and provides multi-scheme configuration compatible products with a great demand in the market, such as an integrated continuously variable transmission ITA / B-C, an integrated hybrid electric driver IDA / B-H, an integrated plug-in hybrid electric driver IDA / B-P, an integrated extended-range electric driver IDA / BE-R, etc. In the invention, a product series which nearly covers the working modes of almost all power transmission systems of the new energy energy-saving automobiles is established by integrally building three modular structures, i.e., an electric control system ECS, an energy system ES and a management system (MBS) thereof based on a basic platform of a motor power assembly MPA module technology, therefore, the automobile has the advantages of greater safety, energy saving and emission reduction, longer cruising distance, higher cost performance, and higher practicability, contribution to standardization, serialization and universalization of the products of enterprises and capabilities of obviously reducing research and development period, effectively reducing the cost and guaranteeing greater long-term competitive advantage in the market of the product.

A vacuum crystallization process uses the sodium nitrate to transform the potassium chloride for the production of the potassium nitrate. The process comprises the following steps: (1) a first time low temperature mother liquid is prepared according to a corresponding phase diagram; (2) the sodium nitrate and the potassium chloride are added by proportion; and the constant temperature conversion is processed at 75-90 Celsius system; (3) the slurry is precipitated at 75-90 Celsius system until the solid percentage reaches 30%-45%, the crystallized high temperature salt is separated through centrifugation and the clear liquid enters into a vacuum crystallizer after filtration; (4) the high temperature salt is washed and the washing liquid is directly sent into the vacuum crystallizer; (5) the cold separation temperature of the vacuum crystallizer is controlled at 25-40 Celsius system, and the potassium nitrate crystal is precipitated; (6) the slurry is pumped into a slurry elevated slot after vacuum crystallization, the slurry is introduced into a centrifuge for the centrifugal separation to obtain the primary product of potassium nitrate; (7) the primary product of potassium nitrate is washed, re-dried and packaged. The invention has a convenient proportion, a mild isolation and transformation condition and a short production process, which can save more than 18% water and more than 20% energy. The operation of the invention is simple, and the process is easy to realize the continuous production and automatization. The invention also has a low production cost and good economic benefits.

The present invention discloses a stressless space follower positioning equipment. It is characterized by that it has a base seat, the upper portion of said base seat is a cylindrical hollow cavity, the lower bottom surface of said hollow cavity is equipped with a plate-shaped heat-insulating layer, the inner wall of the cylindrical hollow cavity is equipped with a ring-shaped heat-insulating layer, in the heat-insulating layer interior a positioning sleeve is set, in the exterior of positioning sleeve an electric heater or electromagnetic coil is fixed, in the interior of said positioning sleeve a supporting bar is set, between the interior of positioning sleeve and supporting bar low-melting point metal or magnetorheologic fluid is filled, the supporting bar and bottom portion of said positioning sleeve are equipped with supporting spring respectively, in the upper portion of said supporting bar a heat-insulating plate and a supporting flange are fixed, and in the upper portion of said base seat an end cover is mounted.

The invention relates to a high-efficiency brake based on the MR technology, which comprises an electromagnetic clutch mechanical (A) producing a damping moment and an electromagnetic braking mechanism (B), wherein a planet accelerator (C) capable of amplifying the damping moment is arranged between the electromagnetic clutch mechanism and the electromagnetic braking mechanism. As the invention adopts the planet accelerator structure which is capable of amplifying the damping moment and is arranged between the electromagnetic clutch mechanism and the electromagnetic braking mechanism, braking with a great moment can be realized under a minor current through the accelerator, thereby saving energy, and further realizing serialization through changing the speed increasing ratio of the internal accelerator. In addition, the invention with small size and light weight is the high-efficiency brake based on the MR technology with smart design, excellent performance as well as convenience and practicability.

The invention relates to a linear motion actuator combined by the fluid drive and the lead screw nut device, which comprises a fluid drive cylinder, a lead screw nut mechanism, a motor, a speed reducer, an electromagnetic brake and a photoelectric sensor. Therefore, a linear motion execution and control unit integrating the fluid, optics, machinery and electronic functions is formed, which can conveniently realize the speed and position control of the linear motion of the high comprehensive index precision.

The invention discloses an intelligent control system of a pattern sewing machine. The intelligent control system comprises software, hardware and a structural system. The structural system comprises an electric cabinet, the hardware comprises a spindle control subsystem and a subsystem controlling a needle rod mechanism, a delineating mechanism, a thread picking-up mechanism, a feeding mechanism and a presser foot mechanism, the spindle control subsystem is provided with a position closed-loop control motion control module and a spindle system failure process and enabling control module, the needle rod mechanism, the delineating mechanism and the thread picking-up mechanism are controlled through an alternating current servo motor, the feeding mechanism is controlled through an XY motor, and the thread picking-up mechanism and the presser foot mechanism are controlled through a stepping motor; a hardware system core is composed of a DSP+ARM double-core system and comprises a bottom layer control platform and an upper layer human-computer interface, the bottom layer control platform is controlled through two main processing chips of a TMS320F2812 and an LC 5512 in real time, and the alternating current servo motor and the stepping motor achieve multi-axis linkage. The DSP+ARM double-core system is high in operating efficiency, displaying of a seven-inch touch screen is achieved through true color images, an operation panel is visual and concise, and a system hardware frame is high in universality.

The invention relates to megawatt multifunctional wind-power generator energy-saving controller, especially for normally used three kinds of wind power generator as direct driving permanent magnet generator, double-feed generator and induction generator, which can reduce generation cost. The inventive megawatt multifunctional wind-power generator energy-saving controller consists of controller and speed meter, insulated grid diode-triode IGBT switch trigger circuit, controllable silicon rectifier SCR trigger circuit, DC overvoltage protector and two transformers each is separately connected with controller. Rotation speed detection end of speed meter is connected with rotor of controlled wind power generator.

The invention relates to a method for separating and purifying bean-kinase in opposition-micelle process, in particular to a new method for extraction and purification of bean-kinase of bean-kinase coarse extraction liquid prepared from fermenting the solid or liquid directly in mother liquid, including the steps of extraction and back extraction; and the related extraction steps contains: proportionally mixing the bean-kinase coarse extraction as aqueous phase with opposition-micelle solution, extracting in 10 to 35 Deg. C, and letting bean-kinase into opposition-micelle solution; back extraction in back extraction liquid, centrifuging in 20 to 45 Deg. C, separating and the purified bean-kinase water solution prepared. It can solve the present problem that craft of purifying bean-kinase is complicated and cycle is long. The recovery ratio of enzyme is more than 80 percent, and the purifying factor more than 3, and at the same time has an effect of concentration decolouration. The cycle is short and facilitating to continuous operation and enlarging by separating and purifying bean-kinase with opposition-micelle process.

The invention provides a preparation method of a composite metal layer plated carbon nanotube / graphene composite material. The preparation method comprises the following steps of uniformly mixing carbon nanotubes and graphene, adding a dispersant after pretreatment, and then forming a carbon nanotube / graphene film; under an inert atmosphere, using the film as a substrate, leading in reaction source gas of tungsten hexafluoride and molybdenum hexafluoride, leading in reducing gas, and making a reaction to obtain a carbon nanotube / graphite stratified material coated with tungsten and molybdenum;adding the stratified material into a copper plating solution, and then adding a reducing agent to make a reaction to obtain a composite metal layer plated carbon nanotube / graphene composite materialprecursor; and sintering the precursor to obtain a composite metal layer plated carbon nanotube / graphene composite material. According to the method, the surface of the carbon nanotube / graphene filmis coated with the tungsten and the molybdenum, the wettability of an interface between carbon and copper is greatly improved, the interface bonding strength is strengthened, and the mechanical properties, the electrical properties and the crocking resistance of the composite material are improved.

The invention relates to a preloaded radial permanent magnet bearing which comprises side rings, an external ring, an internal ring, a magnetism conducting sheet, a ceramic ball component, a static permanent magnet ring set and a movable permanent magnet ring set; the static permanent magnet ring set consists of eight semi-circular permanent magnet rings respectively embedded in two side rings; and the movable permanent magnet ring set consists of an integrated permanent magnet ring and is positioned on the internal ring by set screws. The axial clearance between the static permanent magnet ring set and the movable permanent magnet ring set is constant and equal and is positioned by the ceramic ball component; the ceramic ball component consists of a housing washer and a ceramic ball; and the magnetism conducting sheet is made from a material with high magnetic conductivity. The preload of the bearing is realized by the permanent magnet rings with opposite magnetic pole directions, the bearing capacity of the permanent magnet bearing is greatly increased, the conventional mechanical bearing is replaced by a ceramic ball self-lubricating system with extremely small frictional force, and the bearing is simple and reliable in structure, convenient and fast to use, and convenient for serialized production.

The invention relates to the field of tires, in particular to a run-flat tire. The run-flat tire comprises a tire bead, wherein the tire bead is internally filled with triangular rubber; a bead ring is arranged at the bottom end of the triangular rubber; a tire body layer is arranged around the tire bead; the tire body layer is turned back from the inner side to the outer side of the tire; a belt beam layer is arranged on the outer side of the tire body layer in the radius direction and inside a tire tread part; a tire sidewall supporting rubber layer is arranged between the tire body layer at a tire sidewall and a lining layer; and a tire bead reinforcing layer is arranged on the side surface of the tire bead. Compared with the ordinary run-flat tire, the run-flat tire disclosed by the invention has the advantages as follows: the hardness of tire sidewall supporting rubber is relatively reduced, so that the driving comfort is optimized to a certain extent; under the condition of the same rigidity, the thickness of the tire sidewall supporting rubber is reduced, so that the weight reduction of the tire is facilitated; during to reinforcement of a reinforcing material on a seam allowance position, the flexible deformation of the seam allowance position is relatively small in a run-flat state, and in combination with the reduction in the thickness of the supporting rubber, heat generation at the tire sidewall is reduced and heat dissipation is facilitated, so that improvement on the durability of the tire is facilitated.

The invention relates to a method for cleaning smelted mixed rare earth concentrate by concentrated sulfuric acid. The method is characterized by comprising the following steps of chemically selecting and gathering mixed rare earth concentrate by use of a hydrochloric acid solution and a reinforced impurity remover, mixing the chemically-selected concrete with the concentrated sulfuric acid to roast at a low temperature, carrying out water leaching on roasted concentrate, carrying out resource recovery on a water leaching fluid, carrying out tail gas absorption, and recycling chemical-selected wastewater resources. The method has the advantages that the source of three wastes of a current concentrated sulfuric acid high-temperature roasting process is solved at the front end of concentrate treatment, so that various problems in a low-temperature acid method are solved, the follow-up three-waste treatment difficulty is greatly reduced, the rare earth direct recovery rate is increased, and the purpose of comprehensively recycling various resources in the concentrate and auxiliary materials is finally realized.

The invention discloses a peripheral transmission center automatic rake-lifting thickener, which relates to the technical field of slurry thickeners and overcomes the defects that a conventional peripheral driven thickener cannot integrally lift a rake or a peripheral transmission device generates transverse displacement when a rake frame lifts so as to cause degluing of a tyre, derailing of a roller and the like. The thickener is characterized in that: a center bearing of the thickener consists of a fixed support, a seat ring, a slewing bearing, a rotary rack and a sliding rack; the rotary rack is provided with two hinged supports and four rake-lifting oil cylinders, and four sides of the rotary rack are provided with four sliding keys; four sides of the sliding rack are provided with four sliding grooves, the four sliding keys are inserted into the four sliding grooves respectively, and piston posts of the four rake-lifting oil cylinders are fixed on the sliding rack; the lower partof the sliding rack is fixedly connected with a rotary cage, and the lifting of the sliding rack can be controlled by driving the rake-lifting oil cylinders so that a rake rack is integrally lifted; and a transmission rack is not lifted along with the rake rack so that the transverse displacement of the transmission device is avoided and the transmission mode of the thickener is suitable for peripheral tyre transmission and peripheral roller transmission or peripheral rack transmission.

The present invention relates to universal fixture widely used in machine manufacturing field, and is one kind of electric chuck unit. The electric chuck unit consists of a clamping unit, a power unit, an electromagnetic friction clutch assembly, a casing, an electromagnetic brake assembly, etc. When the electromagnetic brake assembly is powered, the clamping unit is connected to the head stock integrally without rotating; and when the electromagnetic friction clutch assembly is powered, the power unit transfers the rotation to the claws for clamping or unclamping the workpiece. During machining, only the clamping unit rotates with the main shaft. Compared with available technology, the present invention has the advantages of reduced rotating part number and weight, being favorable to raising the dynamic balance quality of the main shaft, etc.