187 results about "Shear flow" patented technology

The invention discloses a jet type micro-droplet generation device and a micro-droplet generation method thereof, and belongs to the technical field of liquid-liquid heterogeneous / homogeneous reaction devices. The device comprises an injection pipe, the injection pipe is used for conveying a first liquid phase, the interior of the injection pipe is of a cavity structure, the injection pipe comprises a feeding section, a mixing section, a diffusion section and a feeding pipe, the feeding section, the mixing section and the diffusion section are sequentially communicated and coaxially arranged, the feeding pipe is used for conveying a second liquid phase, and the feeding pipe penetrates through the side wall of the feeding section and extends into an inner cavity of the injection pipe; a discharging opening of the feeding pipe is formed in the mixing section, and an annular flowing space is formed by the outer wall of the feeding pipe and the inner wall of the mixing section. The feeding pipe extends into the mixing section to form an annular flowing space, and a second liquid phase is dispersed into small liquid drops by fully utilizing the annular space and a strong shear flow field in the mixing section. The method is suitable for a liquid-liquid heterogeneous / homogeneous system, including a liquid-liquid heterogeneous / homogeneous reaction crystallization system generated by solid particles.

The invention discloses a multistage dynamic complex excitation solid waste roadbed filler treatment device and method, and relates to the technical field of solid waste resource utilization. The device comprises a pretreatment unit, a metering unit, a mixing unit and a control unit. The pretreatment unit is used for treating carbide slag, silica fume, excavated spoil and EPS particles, so that the problems that aggregates are not refined, oversized particles are not thoroughly removed, the EPS particles are not graded and the like are solved; in the material mixing unit, a first stirring shaft and a second stirring shaft are vertically distributed to form a three-dimensional shear flow field, and a material lifting device forms vertical convective circulation, so that the problem of non-uniform mixing caused by easy floating of EPS particles due to low density can be effectively solved; and the control unit realizes cooperative control of each unit. According to the device and the method, the mixing uniformity of the solid waste roadbed filler can be improved, the strength fluctuation is reduced, the quality requirement of engineering on the roadbed filler is met, and solid waste resource utilization is promoted.

The invention discloses a powder concentrator for powder materials, and relates to the technical field of powder concentrators, the powder concentrator comprises an annular volute and a grading area arranged in the annular volute, the grading area comprises a plurality of guide blades, the guide blades are arranged in the annular volute in an annular array mode, and the angles of the guide blades can be adjusted according to different particle sizes; the rotating cage is rotationally installed in the annular volute and located in the center of the inner sides of the multiple guide blades; materials enter the base flow guide cone and flow upwards; annular airflow fed by the annular volute on the periphery enters the rotating cage through the tangential angle regulated and controlled by the guide blades, and is separated under the rotating action of the rotating cage. The invention provides a dynamic powder selecting channel with an inner ring for supplying air materials and an outer ring for discharging coarse materials for the first time, and a complete spiral shear flow field is constructed; an annular auxiliary air supply fan is externally arranged, the front shearing and particle staying path of the rotating cage is enhanced, and separation dead angles are avoided; the angles of the guide blades are adjustable, different particle size / productivity requirements are met, and the working condition matching performance is improved.

A viscous clutch assembly includes a rotationally fixed center shaft, a rotor rotatably supported on the center shaft, a housing rotatably supported on the center shaft, a working chamber, a reservoir carried by the rotor, an electromagnetic coil located at or near a front end of the center shaft, a valve subassembly magnetically operable to control flow of a shear fluid between the reservoir and the working chamber, a flux guide extending axially across a cover of the housing, and a magnetic flux insulating material positioned adjacent to and radially inward from the flux guide. A flux circuit located forward of the rotor connects the electromagnetic coil and the valve subassembly and passes through the flux guide and the center shaft, with the magnetic flux insulating material at least partially surrounded by the flux circuit.

The invention relates to the technical field of digital twinning, in particular to a steel and aluminum material trimming parameter optimization method and system based on digital twinning, and the method comprises the steps: obtaining the cumulative cutting work and regrinding times of a cutter, constructing a multi-dimensional wear state space to determine a life cycle stage, and generating a dynamic semantic mask; and the edge side extracts the fourth-order kurtosis and the third-order skewness of the vibration characteristic frequency band component by using a mask, and fuses production line data to generate a cutting semantic packet. And the cloud end predicts shear flow stress and thermal expansion displacement trend by using a thermal-mechanical coupling model, calculates theoretical clearance compensation parameters, performs dual security arbitration through an energy consumption prediction model and an energy envelope boundary, finally performs S-shaped speed planning on approved parameters, and calculates an advance and issues an instruction in combination with full-link lag. According to the method, dynamic control over the steel and aluminum material trimming parameters is achieved through space-time alignment compensation.

The invention relates to the technical field of ocean resource development, in particular to a method for calculating vortex-induced vibration of a deep-sea mining riser under the action of internal waves. According to the method, velocity and acceleration distribution characteristics of a flow field are determined according to wave parameters such as amplitude and wavelength of ocean internal waves, and load input is provided for calculation of vortex-induced vibration of the deep-sea mining riser; the ocean internal wave flow field has remarkable particularity, is different from uniform flow and typical shear flow, and is unsteady non-uniform shear flow; based on the particularity of an ocean internal wave flow field, vortex-induced load distribution on a deep-sea mining riser under the action of a traditional wake flow vibrator model is obtained by improving the traditional wake flow vibrator model; according to the geometric nonlinear problem caused by the large slenderness ratio of the deep-sea mining super-long riser and the weak constraint characteristic of the deep-sea mining riser, the rigid body displacement and the elastic deformation of the riser are separately calculated by adopting a co-rotation coordinate method, so that the calculation efficiency is improved to meet the actual engineering requirements; the invention discloses a calculation method for vortex-induced vibration of a deep-sea mining riser under the action of ocean internal waves.

The invention discloses an internal solitary wave experiment water tank device capable of controlling inclination and return. The internal solitary wave experiment water tank device comprises a tempered glass water tank, a shutter door system, a water tank bracket, a cylindrical pin, a hydraulic system, a connecting rod system and a control system, the inclination angle and the angular speed of the water tank are controlled through a hydraulic system, and background flow is generated through conversion from fluid gravitational potential energy to kinetic energy in the inclination-return process. The blades are driven by the steering engine to open and close synchronously, so that internal solitary waves are generated; simulation of the coupling process of the solitary wave and the background shear flow in different parameters is achieved by adjusting the inclination angle of the water tank, the return speed and the opening and closing time sequence of the blades.

The invention provides a numerical method for immiscible solution drop swallowing behavior in limited shear flow, and relates to the technical field of immiscible solution drop swallowing behavior, a simulation task based on a phase field model and a Navier-Stokes equation is established, a computational domain is discretized through a finite element method, a physical field is initialized, and in each time step, the physical field of the immiscible solution drop swallowing behavior in limited shear flow is calculated. Updated velocity field and phase field data are obtained through coupling solution, the interface curvature change rate and the flow field vorticity intensity are comprehensively calculated, a global index representing the dynamic intensity of the system is generated, the index is compared with a preset threshold value, and the dynamic intensity of the system is calculated. When the index is higher than a threshold value, a smaller step length and a higher grid resolution are adopted, otherwise, a larger step length and a lower resolution are adopted, finally, solver configuration is automatically reconstructed according to the selected parameters, solving is continued under a new adjusting strategy, a self-adaptive numerical simulation cycle is formed, and a new time step is obtained. And completing simulation and outputting complete field data of the liquid drop swallowing process.

A wastewater treatment device based on a persulfate advanced oxidation process comprises a persulfate advanced oxidation reactor, a persulfate adding device and a catalyst adding device, and is characterized in that the persulfate advanced oxidation reactor adopts a structural design of a cylinder at the upper part and a cone at the lower part; an anchor-paddle composite water impeller, a filler layer, a persulfate distributor and a catalyst distributor are arranged in the reactor, an overflow weir, an ultrasonic device, a chemical oxygen demand (COD) on-line analyzer and an oxidation-reduction potential (ORP) on-line analyzer are arranged on the outer wall of the reactor, an anchor stirrer is matched with the conical bottom of the reactor, and through the synergistic effect of mechanical stirring and the ultrasonic device, the persulphate on-line analyzer and the persulphate on-line analyzer are analyzed. A strong shear flow field and an ultrasonic cavitation field are constructed, efficient activation of persulfate and a catalyst is achieved, and the effluent quality is improved. The method has the advantages of high solid-liquid mass transfer efficiency, high catalyst utilization rate, low operation energy consumption, remarkable sludge reduction effect and the like, and is particularly suitable for treating refractory organic wastewater generated in the industries of pharmacy, pesticide and the like.

The invention provides a numerical simulation method for dynamic behaviors among immiscible solution drops in shear flow, and relates to the technical field of fluid mechanics, and the dynamic behaviors among immiscible solution drops in shear flow are calculated by combining microfluidic drop generation with dynamic strain mechanics test, constructing a water-in-oil drop interfacial membrane parameter correlation model and combining measured data of interfacial membrane strain response after progressive increase stress is applied. Systematic analysis on the initial state and the critical state of the boundary membrane is realized; the stability and the performance of the liquid drops in the shear flow are effectively optimized by identifying parameters influencing the critical state of the boundary membrane and implementing an adjusting strategy; em and Ub are accurately regulated and controlled based on definite physical and chemical parameters such as interfacial agent concentration, HLB value, temperature, pH and the like, and deformation and fracture behaviors of liquid drops in shear flow are optimized; the mechanical behavior of the liquid drop can always meet the design requirement, and accurate regulation and control are realized.

The invention discloses a gas device based on shear flow, which comprises a first gas inlet flange, the first gas inlet flange is connected with a mixer shell, a second gas inlet pipeline is arranged on the mixer shell in a penetrating manner, and the left end of the mixer shell is connected with a first gas inlet pipeline; the right end of the gas I inlet pipeline is connected with a spherical seal head and is provided with slotted holes which are uniformly distributed along the pipe diameter, and the slotted holes are positioned right below the outlet of the gas II pipeline; and a semi-elliptical plate is mounted in the mixer shell and is positioned at one end, far away from the gas I inlet flange, of the gas II inlet pipeline. The gas I tangentially flows at the slotted hole and is subjected to first-stage mixing with the gas II, so that the gas flow close to the pipe wall layer is changed; according to the gas mixing device, the first-stage mixing is realized after the gas passes through the semi-elliptical plate, and the second-stage mixing is realized after the gas passes through the semi-elliptical plate, so that the gas mixing uniformity is improved, the pressure loss of the second gas pipeline is not increased, the second-stage mixing is realized while the gas flow channel is changed, and the mixed gas reaches a complete turbulent flow state.

The invention relates to the field of fluid machinery design, in particular to a multi-assembly collaborative optimization combined type gas-liquid centrifugal pump. Comprising an impeller, a flow guide assembly and a volute. The impeller comprises a cover plate and a hub arranged on the cover plate, blades are installed on the hub and divided into a front impeller section and a rear impeller section in the radial direction, a segmented gap is formed between the front impeller section and the rear impeller section, a plurality of backflow holes are symmetrically formed in the cover plate, and the impeller is provided with an impeller inlet and an impeller outlet. A turbulent flow structure is arranged on the face, away from the blades, of the cover plate. In the design optimization of the centrifugal pump, the gas-liquid mixed transportation performance of the centrifugal pump can be effectively improved through a multi-assembly coupled composite structure; the sectional type blades are adopted, a three-dimensional rotary-cut flow field can be formed in the impeller through the synergistic effect of flow guide of sectional gaps and circulation of backflow holes, retained air mass can be efficiently broken, gas phase aggregation can be effectively restrained, and good conditions are created for gas-liquid mixed conveying.

The invention discloses a continuous flow micro-nano bubble gas-liquid mixing system based on a high-shear ultra-dispersion pipeline, and relates to the technical field of fluid mixing, the system is provided with a stirring structure and a high-shear stator structure comprising a fixed frame and a stator cylinder; the stator cylinder is arranged outside stirring blades of the stirring structure in a surrounding manner and is mounted and fixed through a fixing frame; upper notches and lower notches are densely formed in the top edge and the bottom edge of the stator cylinder in a whole-circumference mode respectively, and middle notches are densely formed in the middle of the side wall in a whole-circumference mode. Preliminary mixing of gas and liquid is achieved through the jet device, then a high-strength shear flow field is generated through the synergistic effect of the high-shear stirring structure and the high-shear stator structure, axial vortexes are generated at an upper notch and a lower notch, radial shear is formed at a middle notch, and micro-nano bubble liquid with small micro-nano bubble particle size, high concentration and good stability is formed. The problems that micro-nano bubbles generated by an existing micro-nano bubble generation device are large in particle size, uneven in distribution, low in concentration and poor in stability are solved.

The invention discloses a dynamic real-time measurement method and device for the friction coefficient in a rotary shear type granular material, and belongs to the technical field of granular material measurement. The dynamic real-time measurement device for the friction coefficient in the rotary shear type granular material comprises a rotary shear rheological experiment cavity which is connected to a bottom plate through a mounting bracket; the filler is filled with a to-be-detected granular material; the normal load monitoring unit comprises an upper pressure sensor and a lower pressure sensor which are located on the upper portion and the lower portion of the rotary shear rheological experiment cavity, in-situ real-time measurement of the internal friction coefficient of the granular material in the shear flowing process is achieved, and the technical problem that the internal friction characteristic of the granular material is difficult to measure through a traditional method is solved. A cooperative working mechanism of an axial constraint type dynamic loading platform, an annular medium distribution structure and a rotary shear rheological experiment cavity is innovatively designed, shear flow in the granular material is achieved, and the internal friction coefficient of the granular material is measured.

The application relates to a compression-shear composite loading system based on a pulley system multi-point mean loading, and relates to a compression-shear composite loading system. In order to solve the problem that the traditional compression-shear composite loading is prone to uneven shear flow for a large-size composite stiffened wall plate structure, the application applies uniform compression loads to the side end surface loading end of a test piece through compression actuating cylinders and a flat pressing plate; two shear actuating cylinders output leftward shear loads along the upper end surface of the test piece; and the other two shear actuating cylinders output rightward shear loads along the lower end surface of the test piece; the loads are converted in direction through a pulley assembly and finally act on the shear plates on the upper and lower sides of the test piece. The application realizes the test under different compression-shear ratios by simultaneously adjusting the sizes of the compression and shear actuating cylinder forces, and optimizes the problem of uneven shear loading through the multi-point coordinated loading system, so that the shear of the measuring point is uniform, and the strength test of the large-size stiffened wall plate structure can be better satisfied.

The application belongs to the technical field of marine environment monitoring and early warning, and specifically relates to a multi-channel internal wave flow early warning system and an early warning measurement method, which comprises the following steps: a buoy body is fixedly arranged through a fixed anchor, and a marine profile comprehensive detection module synchronously collects multi-dimensional profile data such as flow velocity, temperature and salinity. A main control unit is embedded with a mixed driving early warning model, a phase velocity of an internal wave is solved based on a physical model, a nonlinear correction is performed through a machine learning residual correction module, a high-precision internal wave phase velocity is obtained, and then early warning time, shear flow and displacement amplitude are calculated and an alarm level is determined. Alarm information is redundantly sent to a shore station receiving system through a ground mobile communication link and a satellite communication link of a multi-channel communication module, and the shore station receiving system regularly updates the machine learning model by taking measured data as incremental samples. The application realizes high-precision and low-delay early warning of internal wave flow, has high communication reliability, and is suitable for marine engineering, underwater vehicles and safety guarantee of offshore operations.

This invention relates to the field of polymer material processing and blending technology, and discloses a fiber uniform mixing process in the preparation of bio-based materials. The process includes: controlling the barrel wall temperature of the main dispersion zone of a co-rotating twin-screw extruder to be lower than the intrinsic melting point of the polylactic acid matrix and turning off the external heater; adding jute fiber bundles and the polylactic acid matrix and controlling the screw speed, utilizing the frictional heat balance temperature difference generated by mechanical shearing to maintain the actual melt temperature above the intrinsic melting point; and conveying the mixture to the secondary diffusion zone as the motor drive torque increases, thereby increasing the barrel wall temperature of the secondary diffusion zone and reducing the screw speed to blend the materials. This invention eliminates temperature control lag, maintains a stable shear flow field, avoids a sudden drop in melt viscosity to improve fiber dispersion uniformity, automatically indicates process stage transitions, avoids material thermal degradation, and improves the stability of the mechanical properties of the finished material.

A downhole tool includes a housing, a movable element positioned about the housing, the movable element configured to move between an uphole position and a downhole position, a deployment piston positioned within a deployment piston chamber, the deployment piston shearingly fixed with the movable element via a shear feature. In one or more embodiments, the deployment piston is configured to move the movable element between the uphole position and the downhole position upon receiving a lower actuation fluid pressure on an up hole side or a downhole side thereof. A shear feature having a shear value of 133 Kilonewtons (KN) or less, the shear feature configured to shear and thereby release the movable element from the deployment piston upon receiving a greater shear fluid pressure on the up hole side or the downhole side of the deployment piston.

The presently disclosed subject matter aims to a system and method including a processing circuitry configured to: obtain: (a) a plurality of independent wave measurements of a body of a fluid, obtained over a period of time, wherein each independent wave measurement is acquired at a distinct location of the body of fluid; and (b) a respective ambient shearing current profile, wherein the respective ambient shearing current profile is based on ambient current values and directions, at different locations within the body of the fluid, related to the respective distinct location; based on the wave measurements and ambient shearing currents profile, assess wave directional spectra characterizing flow regime of waves of the body of fluid, while accounting for the effects of the ambient shearing currents during the wave measurements' period of time; and determine, based on the assessed wave directional spectra, one or more design parameters of the maritime infrastructure.

The application provides an alloy solution mechanical and electromagnetic stirring device, and mainly relates to the technical field of die steel smelting. The alloy solution mechanical and electromagnetic stirring device comprises a support frame, a stirring container is fixedly installed on the support frame, a driving motor is fixedly installed on the top of the stirring container, a solution filling hopper is arranged on the top of the stirring container, a support seat is fixedly arranged outside the stirring container, the support seat is fixedly installed on the support frame through bolts, and a buffer pad is arranged between the support seat and the support frame. The application has the beneficial effects that: the application combines mechanical stirring and electromagnetic stirring, can ensure that relative movement between liquid phase and solid phase is generated in different degrees, multi-dimensional shear flow is generated, the breaking, crushing and proliferation of dendrite arms are caused, a large number of dislocations are migrated from grain boundaries to the inside of the crystals, the purpose of refining grains is achieved, the energy consumption requirement in the stirring process can be greatly reduced, and the purposes of energy saving and emission reduction are achieved.

A step-by-step grinding and polishing method based on the shear rheological effect of a non-Newtonian fluid comprises the following steps: (1) mixing abrasives and additives into a non-Newtonian fluid base liquid with a shear rheological effect, stirring evenly, preparing a shear rheological grinding and polishing liquid, and adding the liquid to a machine tool grinding station; (2) in the fine grinding stage after completing conventional rough grinding and semi-fine grinding, providing a shear rheological grinding and polishing liquid to the grinding zone from the cutting end of the grinding wheel along the direction of the grinding wheel linear velocity; (3) setting the grinding depth to be greater than zero to achieve low-damage grinding of the workpiece surface; (4) setting the grinding depth to be equal to zero, and performing a grinding and polishing composite process on the grinding surface; (5) setting the grinding wheel and the workpiece to a non-contact state, performing shear rheological polishing on the grinding surface, and controlling the material removal rate of each point on the surface during the polishing process by adjusting the rheological properties of the grinding and polishing liquid, the grinding wheel linear velocity, the workpiece feed speed, and the grinding wheel-workpiece gap. The invention is easy to implement, has high processing efficiency, high precision, and strong practicality.

The present invention specifically discloses a method and device for detecting the speed domain of a liquid-viscous clutch based on dynamic solution, wherein the method obtains the fluid Reynolds equation considering the influence of centrifugal force in a cylindrical coordinate system; introduces a pressure flow factor and a shear flow factor into the fluid Reynolds equation to correct the error generated when solving the lubrication of a rough surface; describes the rough surface profile, establishes an M-B fractal contact model to simulate the contact state between micro-convex peaks, and obtains the friction pair gap flow field characteristic parameters; discretizes the friction pair gap flow field characteristic parameters, constructs a liquid-viscous clutch flat-torsion coupling dynamic model, obtains the friction pair gap oil film viscous torque and power transmission mechanism, proposes a discretized numerical solution method for the friction pair gap flow field characteristic parameters, and obtains the output speed and / or output speed range of the load end. The technical solution is adopted to clarify the contact mechanism between the gap fluid and the micro-convex peaks under discrete distribution, and obtain the dynamic mapping relationship between the load end and the input end speed transmission.

The invention provides a gas-liquid separation device based on stepped bubble breaking. The gas-liquid separation device comprises an outer cavity and a rotating mechanism, the outer cavity comprises an inlet cavity and a liquid bearing cavity; a separation cavity, a bubble breaking element and a transmission shaft are sequentially and coaxially arranged in the liquid bearing cavity from top to bottom, the transmission shaft is fixed below the bubble breaking element and is in transmission connection with the rotating mechanism, and the rotating mechanism drives the bubble breaking element and the separation cavity to rotate synchronously; the top end of the exhaust pipe extends out of the upper end surface of the inlet cavity and exhausts air outwards. According to the invention, a variable super-gravity field is provided, a centrifugal field is dynamically enhanced, bubble breaking and separation processes are coupled, strong breaking of large bubbles and micro bubbles is realized through shear flow-turbulent flow driving, deep separation of membrane liquid drops is enhanced by using a gas-liquid density difference effect, and a high-precision bubble breaking effect is realized.

The invention discloses an intelligent preparation and control method for nano metal powder driven by a droplet microfluidic technology, relates to the technical field of metal powder processing, and aims to accurately control particle distribution, calculate particle size distribution uniformity Dcv and dispersion stability coefficient Dsf and optimize a shear flow field through a droplet interface dynamic model in combination with a dynamic light scattering and adaptive optimization algorithm. The particle size uniformity is ensured, the powder stacking density and the conductive stability are improved, and the problem that particle size distribution is difficult to accurately control in an existing method is solved; a high-sensitivity sensor is adopted to monitor environmental interference, Fourier transform analysis and Gaussian process regression reinforcement learning are combined to optimize temperature and flow velocity, by-products and pollutants are reduced, powder purity is ensured, long-term stability of electronic devices is improved, and resistance drift or local overheating is avoided. And aiming at the agglomeration problem, an agglomeration trend value Pag is calculated and graded evaluation is carried out, so that particle agglomeration is effectively inhibited, and the stability and reliability of the conductive material are improved.

The invention discloses a powder additive conveying system which comprises a main body structure composed of a stirring barrel assembly, a storage barrel assembly, a pumping mechanism and a plurality of groups of conveying pipes, a metering type feeding hopper and a liquid quantitative injection valve are arranged at the top of the stirring barrel assembly, and the bottom of the stirring barrel assembly is communicated with the storage barrel assembly through a pneumatic stop valve; the storage barrel assembly is connected with a conveying pipe set with an atomizing nozzle at the tail end through a pumping mechanism, the stirring device is of a double-shaft differential structure, an inner-layer stirring shaft is provided with variable-pitch propeller blades, an outer-layer stirring shaft is provided with an annular flow guide plate for adjusting the inclination angle, and a rotating speed difference is formed through driving of an independent servo motor so as to generate a three-dimensional shear flow field. In the conveying control device, an electromagnetic valve adopts a pulse width modulation control mode and is integrated with a self-cleaning flow channel, a flow regulator is internally provided with a double-turbine flowmeter to form a redundancy measurement mechanism, and a monitoring module is integrated with a capacitive liquid level sensor, an infrared spectrum concentration sensor and a non-contact temperature sensor array.

To provide an instrument which generates a shear flow in a sample and enables NMR lock without affecting the composition of the sample to be measured.SOLUTION: The shear flow generator 10 is an instrument for generating a shear flow in a sample S to be measured in a state of being inserted into a sample introduction hole 91 of a magnetic resonance device 90, and includes a sample tube 1 for storing the sample S to be measured, a stirring tube 2 which is a bottomed tube for storing a reference sample for NMR lock, has a bottomed tip 2a side inserted into the sample tube 1, and applies a shear force to the sample S by rotating around a long axis, and a holding portion 3 for holding both the sample tube 1 and the stirring tube 2.SELECTED DRAWING: Figure 2

The invention discloses an energy-saving spunlace non-woven fabric multi-filtration water treatment device and a treatment method thereof, and particularly relates to the technical field of water treatment.The energy-saving spunlace non-woven fabric multi-filtration water treatment device comprises a primary filter, a fixing plate is fixedly connected to the inner wall of the top of the primary filter, and a rotating ring is movably connected to the edge of the fixing plate through a bearing; a first filter cylinder is fixedly connected to the bottom end of the rotating ring, teeth are arranged around the edge of the rotating ring, a driving rod is connected to one side of the inner wall of the top of the primary filter tank through a bearing, and a driving gear is fixedly connected to the outer wall of the driving rod; through differential reverse rotation of the two cylinders, a high-shear flow field is formed, attached pollutants are stripped, meanwhile, centrifugal accelerated movement can be performed on water through rotation of the filter cylinders, so that sewage filtration is accelerated, a cleaning roller is synchronously driven to rotate through rotation of a linkage shaft, the second filter cylinder and the first filter cylinder are synchronously cleaned, and the cleaning efficiency is improved. Accelerated filtering and filtering cleaning of water flow can be achieved through single power, and the energy-saving performance of the device is improved.

The invention provides fly ash modified asphalt mixing equipment based on pavement, and relates to the technical field of asphalt mixing, and the fly ash modified asphalt mixing equipment comprises a U-shaped rotary bracket, a spherical mixing tank and a coaxial reversing mechanism. The spherical mixing tank rotates along the equatorial plane and rotates in the reverse direction of the stirrer to form a shear flow field, the throwing effect generated by 360-degree overturning of the U-shaped rotary support is overlaid, composite motion of materials in a three-dimensional space is achieved, the mixing uniformity is remarkably improved compared with traditional double-shaft stirring, and the mixing efficiency is improved. The resistance of reverse rotation of the stirrer and the spherical mixing tank is converted into the overall overturning motion of the spherical mixing tank and the U-shaped rotary support, when the resistance is increased, the spherical mixing tank automatically accelerates to overturn, hardened materials with large local resistance are dispersed through material throwing, and the stirring speed is increased; therefore, the phenomenon that the stirring shaft is broken or the motor is overloaded due to overlarge resistance is avoided, and meanwhile, the stirring efficiency is not reduced due to overload prevention.

The application provides a high-toughness and high-wear-resistance bearing steel as well as a preparation method and application thereof, and belongs to the technical field of high-wear-resistance bearing steel metallurgy.The application realizes the homogenization of the composition in the bearing steel, the small matrix structure and carbide by accurately limiting the chemical composition ratio, adopting a composite shear flow casting technology and a specific heat treatment process, and improves the wear resistance of the bearing steel.The preparation method has strong operability, and the composition is controllable.Compared with a traditional gravity casting process, the composite shear flow casting technology adopted by the application can avoid the composition and matrix structure inhomogeneity caused by the traditional gravity casting, and the heat treatment process can make the matrix structure and carbide small, which is beneficial to simultaneously improving the toughness, hardness and wear resistance, and can be popularized and applied in industry.

The invention discloses a magnetic field-assisted fixed-point polishing device and method for an additive manufacturing fine runner, and the magnetic field-assisted fixed-point polishing device and method are characterized in that a magnetic abrasive flowing through the interior of a workpiece is regulated and controlled through a magnetic field generation device capable of moving and rotating in multiple directions: under the condition of no magnetic field, polishing liquid is driven by high pressure to form a high-shear flow field; uniform cutting of the whole runner is realized through a shear thinning effect; when a specific area needs to be emphatically treated, the permanent magnet is accurately moved and positioned to a target area, magnetic particles can rapidly form a chain structure, liquid is locally solidified, and therefore the shearing force of the liquid is increased, and specific positions such as adhering slag and an under-throwing area of a bent pipe are efficiently and accurately removed; high efficiency and high precision are both considered, flow blockage and thermal runaway risks caused by runner defects can be effectively eliminated, and the reliability and safety of key components in the fields of aerospace, high-energy equipment and the like are remarkably improved.