18 results about "Magnetic liquids" patented technology

The utility model provides a kind of magnetic liquid coupling suspension mechanical pump with split end cap, it is characterized by, including: impeller assembly, end cap, shell and rotor assembly;The inner shell cavity is formed in the shell central area recess;The rotor assembly is installed in the inner shell cavity;The impeller assembly is connected with the rotor assembly;The end cap is including first split end cap and second split end cap formed along radial division, the first split end cap and the second split end cap are installed on the wheel shaft along radial direction.The utility model uses split end cap structure, so that it can realize the integrated forming of impeller assembly and rotor assembly, the structure avoids the structural interference problem caused by traditional end cap needing to be inserted from shaft end, so that impeller and rotor can be integrally inserted into shell interior for assembly, significantly reduce assembly complexity and requirement to machining precision.

This invention belongs to the field of oil and gas well exploration and development technology, specifically relating to a high-temperature sealing thread grease for oil casing and its preparation method and application. The thread grease comprises the following components in parts by weight: 33-58 parts base grease, 10-40 parts magnetic fluid, 1-5 parts polyethylene glycol, 5-10 parts phosphate ester, 4-10 parts fumed silica, 3-18 parts graphite, 1-5 parts nano-molybdenum powder, 1-5 parts nano-copper powder, 6-12 parts zinc powder, 10-30 parts lead powder, 5-10 parts alkylphenol resin, 5-15 parts acrylic resin, 5-15 parts polytetrafluoroethylene, 10-18 parts diisocyanate, 10-18 parts polyurethane, 10-12 parts tetraethylene glycol dimethacrylate, and 6-11 parts nitrile rubber. This invention ensures good lubricity while maintaining excellent sealing performance under high-temperature conditions.

The application provides a magnetic liquid interfacial tension coefficient measuring device and method, relates to the field of magnetic liquid physical property characterization, and comprises the following steps: placing a container containing a magnetic liquid and a liquid insoluble with the magnetic liquid at the center of a uniform magnetic field, taking a picture of the situation in the container by a camera and transmitting the picture to a computer for analysis and processing, recording the magnetic field strength when the Rosensweig instability phenomenon occurs at the interface between the magnetic liquid and the insoluble liquid, and calculating the interfacial tension coefficient of the magnetic liquid according to different magnetic field strength ranges by using different methods. The application divides the influence of the magnetic field on the interfacial tension coefficient into a weak magnetic field before the Rosensweig instability occurs and a strong magnetic field greater than the threshold value, so that the measurement of the interfacial tension coefficient under two magnetic field conditions can be realized on one device. Moreover, the measurement result of the application is not affected by the interface deformation, and the measurement result is more accurate.

The application discloses a multi-shaft multi-stage magnetic liquid-under-spraying stirring pump, which comprises a lifting mechanism, a mounting plate arranged on the lifting mechanism, a rotating mechanism arranged on the mounting plate, at least one multi-stage magnetic liquid-under-spraying stirring pump, a pump shell and a pump transmission main body arranged in the pump shell and rotating, the pump transmission main body is arranged on the mounting plate, the pump shell is fixedly connected with the rotating mechanism and rotates by the rotating mechanism. The application can adjust the number of the multi-stage magnetic liquid-under-spraying stirring pumps according to actual needs by arranging at least one multi-stage magnetic liquid-under-spraying stirring pump on the mounting plate, the height of the multi-stage magnetic liquid-under-spraying stirring pump on the mounting plate can be adjusted by arranging the lifting mechanism, so that the spraying and stirring height is adjusted, and the waste liquid sediment layer in the tank can be sprayed and stirred in all directions by rotating the nozzle of the multi-stage magnetic liquid-under-spraying stirring pump by the rotating mechanism.

A method for preparation of a magnetic liquid metal includes: 1) placing A parts by weight of a liquid metal in a container; 2) placing B parts by weight of a metal powder in the container; 3) adding an acidic solution into the container until the liquid metal and the metal powder are submerged; 4) stirring until the liquid metal and the metal powder are sufficiently mixed; and 5) adding water for cleaning the acidic solution, to obtain the magnetic liquid metal by removing the acidic solution. The viscosity and stiffness of the prepared magnetic liquid metal can quickly respond to the stimulus from an applied magnetic field, and a reversible change from liquid to semisolid or solid exists. With a change in magnetic field strengths, the Young's modulus can be regulated in a range from the level of kPa to the level of MPa.

This invention discloses a self-powered monitoring system for a high-speed magnetic liquid rotary sealing device, relating to the field of monitoring the operating status of high-speed magnetic liquid seals. The system includes a thermoelectric power conversion module, an energy management module, and a monitoring module. The thermoelectric power conversion module captures the frictional waste heat generated by the high-speed magnetic liquid rotary seal during high-speed operation and converts it into electrical energy. The energy management module stores and manages the electrical energy generated by the thermoelectric power conversion module and supplies power to the monitoring module. The monitoring module senses the operating status of the high-speed magnetic liquid sealing device and wirelessly transmits the sensed sealing status information to a terminal for wireless monitoring. The thermoelectric power conversion module includes a cylindrical heat-conducting cylinder, a plurality of heat dissipation fins arranged in an array along the circumferential direction, and a plurality of thermoelectric generators. The heat dissipation fins are disposed on the inner side of the cylindrical heat-conducting cylinder and arranged along the circumferential direction, with a thermoelectric generator sandwiched between each heat dissipation fin and the inner wall of the cylindrical heat-conducting cylinder. This invention can collect the frictional waste heat generated during the operation of a high-speed magnetic liquid rotary sealing device and convert it into electrical energy to power the monitoring system. This eliminates the need for an additional power supply device to monitor the operating status of the high-speed magnetic liquid rotary sealing device, thus solving the energy supply problem for wireless monitoring of the high-speed magnetic liquid sealing device.

This invention discloses a roller with a magnetic liquid seal. The roller includes a shaft, a roller body, a bearing, a first magnetic shielding cylinder, a second magnetic shielding cylinder, and a sealing assembly. The roller body is rotatably mounted on the shaft, and its end has a mounting cavity. The bearing is mounted on the shaft and located within the mounting cavity. Both the first and second magnetic shielding cylinders are located within the mounting cavity and on the side of the bearing adjacent to the opening of the mounting cavity. One of the first and second magnetic shielding cylinders is sleeved on and connected to the shaft. The first and second magnetic shielding cylinders are radially spaced relative to each other along the shaft. The sealing assembly includes a sealing unit, a magnetic liquid, and a magnetic conductor. The sealing unit and the magnetic conductor are both located within the magnetic shielding cavity and radially spaced along the shaft to form a sealing gap. The magnetic liquid fills the sealing gap. The roller with a magnetic liquid seal of this invention has advantages such as high sealing efficiency, long service life, and simple structure.

This invention relates to a tiltable liquid deformable mirror driven by a composite magnetic field. It uses an oil-based magnetic liquid and a transparent aqueous solution with matching density as the core optical interface materials. A silver nanofilm is directly prepared at the interface between the magnetic liquid and the aqueous solution using an oil-water interface self-assembly method to improve the reflectivity of the optical interface. High-precision deformation control of the liquid surface is achieved through a micro-coil array. A uniform magnetic field generated by a Helmholtz coil ensures a linear response between the deformation of the magnetic liquid and the driving magnetic induction intensity. Simultaneously, a gradient magnetic field generated by a Maxwell coil suppresses interface shift between the two liquids under tilting conditions. The container is constructed from photosensitive resin and quartz glass, and a material affinity design ensures stable interface maintenance between the two liquids. Compared with existing technologies, this invention solves the problems of interface instability and nonlinear deformation response when traditional magnetic fluid deformable mirrors are tilted, giving magnetic fluid deformable mirrors a wider range of applications.

The embodiment of the present application discloses a magnetic liquid sealing device capable of realizing self-supply of magnetic liquid, comprising a shell, a rotating shaft and at least one pole shoe, the rotating shaft is provided with at least one first magnetic liquid storage groove for accommodating standby magnetic liquid, and / or part of the pole teeth is provided with a second magnetic liquid storage groove for accommodating standby magnetic liquid. The magnetic liquid sealing device of the embodiment of the present application can self-supply the magnetic liquid in the sealing gap, effectively solve the problem of evaporation of the magnetic liquid, improve the sealing reliability and service life of the magnetic liquid sealing device, and automatically supply the magnetic liquid in the sealing gap without an additional sensor, thereby improving the reliability of the device. The magnetic liquid storage groove is designed on the rotating shaft or the pole tooth, axial installation space is saved, the magnetic liquid can be automatically supplied or replaced without disassembling or opening the sealing device, maintenance cost and downtime are reduced, and sealing effect and equipment safety are improved.

The invention relates to the improvement of the cooling efficiency of electric motors by utilizing the internal magnetic field and magnetic fluids, aiming to enhance convective heat transfer for improved cooling performance. In this invention, cooling channels are positioned near the coil windings and stator regions—where heat generation is most intense—by making use of the magnetic field already present within the motor. Magnetic fluids (magnetic liquid metals or magnetic nanofluids) are employed as the coolant, and magnetohydrodynamic (MHD) effects are induced through the Lorentz forces exerted by the magnetic field, which alter the flow velocity profile and enhance convective heat transfer. By this method, while the motor temperature is reduced, its cooling capacity is significantly increased. The invention comprises the components rotor (1), stator (2), shaft (3), coil windings (4), housing (5), magnets (6), and cooling channels (7).

This utility model relates to the field of liquid level gauge technology and discloses an explosion-proof magnetic liquid level gauge, including a measuring plate, a measuring tube disposed on the rear side of the measuring plate, a flip-up indicator disposed on the front side of the measuring plate, a warning assembly connecting the top of the measuring tube to the warning indicator, a connecting rope fixedly connected to the inner wall of the measuring tube, a magnetic component slidably connected to the outer wall of the connecting rope, a float fixedly connected to the bottom of the magnetic component, a corrugated compensator fixedly connected to the top and bottom of the measuring tube, a first connecting pipe disposed at the end of the corrugated compensator, a third connecting pipe disposed at the end of the first connecting pipe, and a piston assembly connecting the inner wall of the third connecting pipe to a second connecting pipe. In this utility model, the magnetic liquid level gauge integrates a pressure safety protection function. When the pressure inside the tank exceeds the limit, the top warning indicator immediately alarms, and the operator can quickly drive the piston assembly to cut off the connecting pipe, preventing leakage and explosion risks while supporting pressurized disassembly and maintenance.

The present application relates to the technical field of building suspended ceiling, in order to solve the problem of complex installation process and high maintenance cost of traditional suspended ceiling plate using screws or glue installation, specifically proposes the design method and application of suspended ceiling plate and keel fixation based on magnetic force. Including: the magnet material is used as the fixing material for the suspended ceiling plate and the keel; the comprehensive force of the magnet material on the keel and the suspended ceiling plate is calculated; the horizontal seismic force of the suspended ceiling plate is calculated; the mechanical model between the comprehensive force of the magnet material on the keel and the suspended ceiling plate, the gravity of the suspended ceiling plate and the horizontal seismic force of the suspended ceiling plate is constructed; according to the mechanical model, the amount of magnet material is determined. The present application uses the magnetism and viscosity of the magnet material to make it easier to fix the suspended ceiling plate and reduce the later maintenance. By obtaining the minimum area of the magnetic liquid and the minimum volume of the magnetic powder in the magnetic liquid, the reasonable usage is determined, and the construction cost and manpower installation cost are saved.

This invention discloses a magnetic liquid level measurement and calibration device and method. The device includes a slide table, a sealed housing, a camera, and a laser displacement sensor. Two sealed housings are arranged opposite each other, each with a magnetic ring at one end. A magnetic liquid ring is placed between the two magnetic rings. The slide table is mounted on a base plate, and both sealed housings are connected to the slide table to allow for adjustable distance between the magnetic rings. The camera is tangentially aligned with the outer surface of the magnetic liquid ring in a certain direction, and the laser displacement sensor is radially aligned with the outer surface of the magnetic liquid ring in the same direction. A vacuum component is connected to the sealed housing to change the vacuum level within it. This invention can correct the liquid level contour line acquired by the laser displacement sensor based on the outer contour boundary image acquired by the camera, and establish a correspondence between the liquid level contour lines acquired by the laser displacement sensor under different curvatures and inclinations and the actual liquid level contour lines of the magnetic liquid.

This invention discloses a magnetic liquid sealing device with staggered fin-shaped pole teeth, belonging to the field of mechanical sealing technology. It mainly consists of two parts: a sealing device structure and a magnetic sealing body. The device comprises: a shell, a rotating shaft, a left bearing, a left spacer, sealing ring I, pole shoe I, sealing ring II, a magnet, sealing ring III, pole shoe II, sealing ring IV, a right spacer, a right bearing, and an end cap. In this magnetic liquid sealing device, the pole shoes I and II and the pole teeth of the rotating shaft are fin-shaped and protrude, tilting to the same side. The sides of the pole teeth and adjacent tooth grooves are all arc-shaped structures; wherein, the steep arc-shaped side of the fin-shaped pole teeth connects to the steep arc-shaped side of its adjacent tooth groove, and the gentle arc-shaped side of the fin-shaped pole teeth connects to the gentle arc-shaped side of its adjacent tooth groove. When the rotating shaft rotates at high speed: high-pressure medium leakage encounters the steep arc-shaped sidewalls, generating vortex dissipation, increasing resistance, and exhibiting a unidirectional flow hindrance effect. The steep, curved sides of the toothed grooves can prevent the magnetic fluid from being thrown outwards, confining most of the magnetic fluid within the grooves to form a sealing ring, thus improving the structure's pressure resistance and ability to withstand high linear velocities.

The application relates to the technical field of intelligent targeted magnetic response micro robots, and discloses a polyphenol-modified magnetic liquid metal-based micro intelligent antibacterial robot and a preparation method thereof.The preparation method comprises the following steps: dissolving polyphenol and an aminoglycoside antibiotic in water, performing a Schiff base reaction to obtain a precursor solution; adding magnetic liquid metal particles into the precursor solution, centrifugally collecting the solid phase after reaction to obtain a precursor; and soaking the precursor in a high agglutinin affinity sugar solution, stirring and reacting, and then centrifugally collecting the solid phase to obtain the polyphenol-modified magnetic liquid metal-based micro intelligent antibacterial robot.The application utilizes the multiple hydrogen bonds of natural polyphenol and the coordination effect of the magnetic liquid metal surface to form a stable interface network, thereby providing a stable support for sugar ligand fixation; meanwhile, tobramycin participates in polyphenol network construction in the form of a Schiff base interaction, realizes the pH-responsive release of the antibiotic, combines and stabilizes mannose, and finally obtains an intelligent targeted antibacterial micro robot.

The present application relates to the technical field of industrial waste resource utilization, and discloses a process for preparing iron fine powder and high-purity zinc oxide from hot galvanizing waste acid, which comprises the following steps: first, adding a crystal face directing agent containing polyethylene glycol and ascorbic acid into the heated waste acid, and then adding a zinc source for replacement; monitoring the oxidation-reduction potential in real time, starting a high-shear dispersion mode when the potential drops to a threshold value, and introducing the slurry into an external circulation loop comprising a magnetic separation device, using a magnetic field to trap the iron powder, and returning the permeable magnetic liquid to the system until the reaction endpoint; the separated iron powder is treated to obtain iron fine powder; the filtrate is subjected to hydrothermal reaction to prepare nano zinc oxide after impurity removal; and the calcium chloride mother liquor is added into concentrated sulfuric acid for high-temperature evaporation crystallization under negative pressure, and the regenerated hydrochloric acid is recovered by condensation, and calcium sulfate whiskers are collected. The present application solves the problems of iron passivation and separation, and realizes the high-value recovery and utilization of all components of the waste acid.

The application relates to the field of power facilities and provides a 35KV gas-filled cabinet with real-time air pressure detection, which comprises a machine body, a cabinet body movably connected to the outer surface of the machine body, and a pressure relief tank fixedly connected to one side of the inside of the machine body. After a module adjusting structure is added, the cabinet can be disassembled outside the cabinet, the inside machine body is pulled out, the back of the gas-filled machine body is fixed through the connection of first clamping teeth and second clamping teeth, all the machine bodies do not need to be disassembled, the machine body at the position needing to be adjusted is directly pulled out, the structure is taken out, after a module is installed, the wire arrangement can be quickly carried out, the structure is sealed through the internal magnetic liquid, a machine for detecting the liquid height is installed in the inside of the gas-filled cabinet, when the internal pressure changes, the liquid can quickly react under the sealed state, the detection structure is more accurate than general detection air extraction structures, the detection pressure effect is good, and the structure can also timely supplement the internal gas pressure.