15results about How to "Improve suspension stability" patented technology

This invention discloses a high-temperature resistant, high-density water-based drilling fluid for ultra-deep wells and its preparation method, belonging to the field of oil and gas drilling technology. The drilling fluid is composed of the following components in parts by weight: 100 parts water, 2-5 parts high-temperature resistant modified clay, 150-280 parts composite weighting agent, 8-15 parts high-temperature resistant polymer filtration loss reducer, 3-8 parts core-shell type high-temperature resistant flow modifier, 4-10 parts nano-composite plugging agent, and 2-5 parts high-temperature stabilizer. This invention effectively solves the technical problems of rheological runaway, increased filtration loss, and barite sedimentation in ultra-deep well high-density water-based drilling fluids under high-temperature conditions above 220℃ by utilizing the high-temperature expansion-disintegration mechanism of the core-shell type flow modifier, nano- to micron-level multi-stage plugging, and the close packing of spherical and irregular weighting materials. It exhibits temperature resistance up to 220℃ and a density of 2.80 g / cm³. 3 It has the advantages of low filtration loss under high temperature and high pressure and good sedimentation stability.

The invention belongs to the technical field of food processing, and relates to a melon rind source stabilizer, an extraction method thereof and application of the melon rind source stabilizer in watermelon juice. The extraction method comprises the following steps: S1, preparing watermelon peel pulp: taking inner peels of watermelons, adding water, and crushing into the watermelon peel pulp; step S2, alkaline hydrolysis ester removal: regulating and controlling a water medium microenvironment to enable the pH value of the melon rind pulp to be 10-13, and reacting at room temperature to remove methyl ester groups; then filtering and washing in sequence to obtain watermelon peel residues; and S3, low-temperature high-pressure homogenization and vacuum freeze drying are combined. The watermelon peel source stabilizer is extracted from watermelon inner peel pulp through alkaline hydrolysis ester removal and low-temperature high-pressure homogenization combined with vacuum freeze drying treatment, has a good network framework, and is not prone to molecular chain breakage, charge shielding or dehydration shrinkage in ultrahigh-pressure sterilization, so that the stability of watermelon juice is improved, and the stability of the watermelon juice is improved. Particularly, the double-effect stability of lycopene and juice in the watermelon juice can be regulated and controlled.

The five-degree-of-freedom permanent magnet biased magnetic suspension bearing comprises an outer stator set and an inner rotor set, the outer stator set comprises a stator iron core and two stator magnetic rings arranged at the two ends of the stator iron core respectively, a plurality of stator teeth are arranged on the inner wall of the stator iron core in the radial direction, and coils are wound around the stator teeth; the inner rotor set comprises a rotor core and two rotor permanent magnets arranged at the two ends of the rotor core respectively. The rotor core and the stator teeth are arranged oppositely in the radial direction and are in clearance fit. The two stator magnetic rings and the two rotor permanent magnets are magnetized in the axial direction, the magnetizing directions of the two stator magnetic rings are opposite, and meanwhile the magnetizing direction of any stator magnetic ring is opposite to the magnetizing direction of the rotor permanent magnet opposite to the stator magnetic ring in the radial direction. A static bias magnetic field is provided by permanent magnet acting force between the stator magnetic ring and the rotor permanent magnet, dynamic suspension auxiliary adjustment is performed by using electromagnetism, the power consumption of the system is remarkably reduced, the size is small, and the weight is light.

The invention discloses porous polycaprolactone microspheres for tissue filling and a preparation method of the porous polycaprolactone microspheres, and relates to the field of biomedical materials. The microsphere is composed of polycaprolactone, the diameter of the microsphere is 40-70 [mu] m, the dispersion coefficient of the microsphere is less than 5%, the porosity of the microsphere is 55-85%, and the surface of the microsphere is provided with a uniform open pore structure formed by tridecane. According to the preparation method, a microfluidic technology is adopted, a tridecane-containing polycaprolactone dichloromethane solution is taken as a dispersion phase, a polyvinyl alcohol aqueous solution is taken as a continuous phase, an oil-in-water emulsion is formed through microchannel shearing, and curing, washing and freeze-drying are performed to obtain the tridecane-containing polycaprolactone / polyvinyl alcohol composite material. The microspheres disclosed by the invention have excellent monodispersity and a porous structure, and can remarkably promote fibroblast proliferation and collagen secretion and induce moderate inflammatory response to activate tissue regeneration. The process is simple and controllable, and the obtained microspheres have injectability and a tissue repair promoting function and have application prospects in the field of soft tissue repair.

The application discloses a primary-secondary double-side cooperative hybrid excitation linear motor, which comprises a primary mover and a secondary stator, and an electromagnetic air gap is formed between the primary mover and the secondary stator; the primary mover comprises a primary iron core, a primary permanent magnet and a primary armature winding, the primary permanent magnet and the primary armature winding are arranged on the primary iron core; the secondary stator comprises a secondary permanent magnet, a secondary excitation winding and a back iron, the secondary permanent magnet and the secondary excitation winding are arranged on the back iron. Compared with a conventional permanent magnet linear motor, the structure can significantly improve the air gap magnetic flux density under the same excitation current, enhance the overall magnetic field coupling strength of the motor and improve the material utilization, which not only greatly improves the thrust of the motor, but also further improves the suspension stability of the magnetic levitation vehicle. The performance gain is derived from the magnetic circuit superposition effect generated by the double-side cooperative excitation, rather than the traditional simple magnetic circuit regulation mechanism.

The application relates to a CMP composition for obtaining a high-quality SiC single crystal substrate surface, which is prepared from the following raw materials in percentage by weight: 20-50 wt% of polishing abrasive, 3-5 wt% of oxidizing agent, 0.1-0.5 wt% of surfactant, 0.2-0.5 wt% of hydrogen bond regulator, 0.2-1 wt% of polishing accelerator, 0.01-0.05 wt% of defoaming agent, and the balance of water; the CMP composition is neutral. The CMP composition uses silicon oxide as the abrasive, introduces the hydrogen bond regulator, the polishing accelerator and the oxidizing agent, improves the polishing rate of the silicon carbide wafer CMP, realizes that the surface roughness Ra of the silicon surface after cleaning can reach below 0.07 nm, the surface after cleaning is free of large particles (>0.2 um), meanwhile, the silicon oxide raw material does not need to be treated, has excellent long-term storage stability, and the system does not have the phenomena of particle agglomeration and sedimentation with the prolongation of the storage time, and excellent polishing surface quality can be obtained in the subsequent polishing process.

The invention belongs to the technical field of inorganic nonmetallic mineral fillers, and provides starch modified barium sulfate slurry as well as a preparation method and application thereof. The preparation method of the starch modified barium sulfate slurry comprises the following steps: modifying preheated barium sulfate powder with a silane coupling agent solution to obtain modified barium sulfate; mixing starch with water, and gelatinizing to obtain starch liquid; and mixing the starch liquid with the modified barium sulfate, and carrying out microwave treatment to obtain the starch modified barium sulfate slurry. The barium sulfate is an inorganic mineral and has poor affinity with organic plant fibers, and barium sulfate particles significantly improve the retention rate of the filler and the distribution uniformity of the filler in paper sheets through the binding force of starch and fibers, thereby finally achieving the purposes of improving the paper quality and reducing the production cost.

This invention provides a suspended, highly stable metal processing material rack, relating to the field of material rack technology. The rack includes a positioning and suspension assembly installed on its inner wall. The positioning and suspension assembly comprises multiple support bars fixedly installed on the inner wall of the rack. Multiple V-shaped suspension frames are fixedly connected to both sides of each support bar, and the inner wall of each V-shaped suspension frame has a V-shaped groove. A bottom bar is provided below each V-shaped suspension frame, fixedly connected to the rack. Multiple positioning base frames are fixedly installed on the upper surface of the bottom bar, and the inner wall of each positioning base frame has a positioning groove. This invention utilizes the positioning and suspension assembly and the V-shaped grooves on the V-shaped suspension frames to achieve counterweight suspension. The bottom of the metal processing material is located in the positioning groove inside the positioning base frame, and two inclined blocks can achieve tilted suspension and positioning of the bottom of the metal processing material, significantly improving the suspension stability of the metal processing material.

The utility model discloses a mobile power supply, which relates to the technical field of charging devices and comprises a shell, a battery assembly, a data line and a connecting piece. The shell forms an accommodating cavity and is provided with a wiring hole; one end of the data line is a connecting end, the connecting end extends into the accommodating cavity through the wiring hole and is electrically connected with the battery assembly, and the other end of the data line is a movable end which is provided with a charging connector and is positioned outside the shell; the connecting end of the data line is connected with the shell wall of the shell through the connecting piece; wherein a first connecting structure is formed on the outer side of the shell, a second connecting structure is formed at the movable end, and the second connecting structure is detachably connected with the first connecting structure. The charging wire of the mobile power supply provided by the utility model can be used as a hanging rope so as to improve the use convenience and simplify the structure.

The present application relates to inorganic processing technical field, specifically disclose a kind of grafted diamond micro powder and its preparation method, the present application is grafted by surface polymerization, constructs the polymer graft structure with steric hindrance and solvation effect on the surface of diamond micro powder, solves its dispersion and suspension stability problem, improves the machining precision of workpiece;And this grafting process is stable, applicable to the demand of different polishing frequency and different size diamond.

This invention discloses a method for full-cycle carbon dioxide sequestration based on multiphase reaction filling materials, relating to the field of carbon sequestration, comprising the following steps: adding gaseous SiO2 and nano-CaO particles to the filling material as gas-entraining agents and transport enhancers; injecting CO2 gas into the filling slurry to form a gas-liquid two-phase dispersion system, and adding a surfactant with a mass fraction of 0.05%-0.2% to the filling slurry; transporting the filling slurry to the downhole filling area through a delivery pipeline, and installing an online rheometer in the delivery pipeline; after the filling slurry is injected into the goaf, injecting CO2 into at least one of the top, bottom, and sidewalls of the goaf through a gas injection pipeline until a gas-liquid-solid three-phase reaction interface is formed; monitoring its strain and acoustic emission signals in real time, and when a sudden change in signal is detected, determining that a new fracture has been generated or an existing fracture has expanded, and injecting CO2 gas into the target fracture through a pre-embedded gas injection pipeline.

This invention provides a temperature-sensitive high-temperature resistant suspension stabilizer for oil-based drilling and completion fluids and its preparation method. The preparation method includes the following steps: a) mixing dimer acid monomers and acid anhydride monomers, stirring at 80-90°C until fully mixed, and then purging with nitrogen to remove oxygen, obtaining a first mixture; b) adding a dimer fatty amine monomer to the first mixture obtained in step a, stirring evenly, obtaining a second mixture; c) slowly adding polyethylene polyamine to the second mixture obtained in step b, then heating to 130-180°C, stirring and reacting, removing water from the product solution after the reaction, obtaining the product; d) cooling the product obtained in step c to room temperature, thus obtaining the temperature-sensitive high-temperature resistant suspension stabilizer. The beneficial effects of this invention are: the prepared temperature-sensitive high-temperature resistant suspension stabilizer for oil-based drilling and completion fluids has excellent high-temperature resistance and can effectively enhance the suspension stability of oil-based drilling and completion fluids under high-temperature conditions.

The utility model discloses a kind of conveniently hang's patch panel, including patch panel body and several power interfaces, the power interface is arranged on the patch panel body, at least one through type suspension structure is opened in the patch panel body, the suspension structure at least includes one plug-in channel extending in the patch panel body. The utility model has the effect of increasing suspension stability, better bearing capacity.

The utility model provides a gift hanging device. The gift hanging device comprises a hanging assembly, a driving device and a base, wherein the driving device is used for driving the hanging assembly to rotate; the driving device is fixed to one side face of the base, and the output end of the driving device penetrates through the base to be fixedly connected with the hanging assembly. The hanging assembly comprises a hanging rod and a spiral sleeve arranged on the outer side of the hanging rod in a sleeving mode, and the spiral sleeve is provided with a spiral gap. According to the gift machine hanging device, gift hanging stability and prize output precision are improved, shaking and falling are prevented, hanging operation of players is facilitated, interestingness and attraction of a gift machine are increased, the entertainment atmosphere and user experience are improved, and a new playing method of the gift machine can be developed based on the gift machine hanging device.

Disclosed is a process for forming a coating for wood products comprising the steps of: forming a paste, said paste comprising glass beads, a polyether-based dispersant, and synthetic layered silicate; and mixing said paste with a binder to form said coating. Pastes for use in producing the coating, the coatings themselves, and finished wood products containing the coatings, are also described. Applicant has discovered that the best performance occurs when the concentration of glass beads in the coating ranges from 5 wt % to 15 wt %.