37results about How to "Overcome repulsion" patented technology

The invention discloses a centrifugal gas electro-spinning device used for preparing a large number of three-dimensional nanofiber scaffolds. The device comprises a high-voltage power supply device, a gas supply device, centrifugal sprayers, open rotary receiving devices and a centrifugal drive mechanism. A liquid storage cavity is formed in each centrifugal sprayer, and thin yarn outlets are formed in the centrifugal sprayers. Each open rotary receiving device comprises a rotary shaft, a transmission device and a plurality of supporting arms. The supporting arms can form a bowl-shaped rotary face when rotating along with the rotary shafts. A plurality of the open rotary receiving devices are arranged. The centrifugal sprayers are distributed to form an annular shape in a center mode. The high-voltage power supply device and the centrifugal sprayers are connected with the open rotary receiving devices to form an electric field required by generation of solutions or melt jet flow. The centrifugal sprayers are provided with gas guide channels connected with the gas supply device so that auxiliary drawing air flow can be generated. Polymer which is jetted forms nanofibers through the electric field, the air flow and centrifugal force, compatibility to biological materials is better, the material application range is wide, and the obtained scaffold structures facilitate cell growth in tissue engineering application.

The invention provides an account access right setting method and a manipulator. The manipulator is linked to network equipment through a communication platform. Firstly, a control application program of the manipulator is linked to the network equipment, which is about to set account access right, through the communication platform; then, the control application program enables an account access right setting function, a setting result is inputted, and the setting result is transmitted to the network equipment linked to the control application program; and finally, a function application program of the network equipment stores the setting result, and access service or access limit of the local terminal is opened up according to the setting result. The account access right setting function enabled by the control application program of the manipulator comprises whether access to account setting of the network equipment is allowed or whether use of setting of the network equipment is allowed in a local area network.

This invention relates to a battery closure head method, including the following processes: providing a battery can and a matched head cover; use gripping device to fix the can and the head cover, the can spins around the axle wire, and the head cover spins around the same axle wire in negative direction, and gradually get near; when the spinning can contacts the head cover, the can and the head cover produce heat through friction, till to the plastic melting state, add opposite upset pressure on the can and the head cover at the same time of frictional heat, and make the can and the head cover joint. The advantages are good sealing and low cost.

The invention discloses a fast connecting device realizing heavy current charge and discharge; the fast connecting device comprises a fixed seat and a movable seat; the fixed seat comprises a fixed pedestal; a wedge form female end is fixed in the fixed pedestal; the movable seat comprises a movable pedestal; a wedge form male end is fixed in the movable pedestal; the wedge form male end inserts the wedge form female end, the wedge form female end wraps left, right and front end faces of the wedge form male end so as to form a mutually attached electric connecting structure; a buckling mechanism is arranged between the movable seat and the fixed seat, and pulled to push the movable seat to move to the fixed seat so as to form firm connection. The wedge form female end and the wedge form male end can realize multi-aspect electric connections via an insertion and matching mode, thus providing a much greater conductive contact area when compared with a conventional spring form; a spring buckle is arranged outside the connecting device so as to keep firm connection, thus enabling the wedge form female end to always firmly wrap the wedge form male end, keeping the electric connection stability, and realizing fast charging / discharging connection of heavy currents above 100A.

The invention discloses a box body structure with an opening and closing cover, which belongs to the technical field of box body structures, and comprises a lower case and an upper cover rotatably connected with the lower case, and the lower case and the upper cover are matched with buckles Assembly, the buckle assembly includes a first buckle and a second buckle, and also includes a button connected to the second buckle, a first magnet is installed on the inside of the button, and a box that is connected to the second buckle is installed in the box. A second magnet that repels each other; the button passes through the box body and moves back and forth to make the first magnet approach or move away from the second magnet; the second buckle is located at the side of the first buckle The inner side is engaged with the first buckle to close the box body; the first buckle is separated from the second buckle to open the box body. In this design, the button can be automatically reset when no external force is applied. It has a technological sense of design. When the cover is closed, press the button to make the first buckle and the second buckle snap together, avoiding the wear and aging of the buckle components, and the cost is low.

The invention discloses an annular permanent magnet assembling mechanism, relates to a mechanical assembling mechanism and aims to solve the problem about eccentricity during reverse assembling of annular permanent magnets. The annular permanent magnet assembling mechanism comprises a regular octagonal threaded sleeve, a regular octagonal through hole sleeve and two groups of locknuts, the regular octagonal threaded sleeve, the regular octagonal through hole sleeve and the locknuts sleeve a central long screw column, four ribs combined with the threaded sleeve and four ribs combined with the through hole sleeve are crossly distributed, and the regular octagonal through hole sleeve is arranged between two groups of locknuts. By the aid of step action of transmission of the central long screw column, repulsion force stressed on permanent magnet combination during reverse assembling is overcome, the permanent magnet combination is kept close, and eccentricity of the permanent magnet combination during reverse assembling is avoided greatly by supporting of the central long screw column, the ribs and metal buttons. The annular permanent magnet assembling mechanism is applicable to assembling of the annular permanent magnets.

The invention provides a contactor. The contactor comprises a shell, fixed contacts (202), moving contacts (204), at least two moving contact finger parts (206) conductively connected with the moving contacts, a U-shaped magnetic circuit (208) encircling the moving contact finger parts and a plate-shaped magnetic circuit (210) which is opposite to the opening of the U-shaped magnetic circuit and is separated from the opening by an air gap, wherein the moving contacts are arranged at the two ends of the moving contact finger parts; the fixed contacts are arranged opposite to the moving contacts; and the at least two moving contact finger parts are basically arranged together in parallel and insulated with each other. The contactor conforms to the class 2 standard of IEC (international electrotechnical commission) 60947-4 and can not be subjected to contact welding in the test run process of the prospective current.

The invention discloses an auxiliary device and method for adding a secondary magnet to a loudspeaker. The device is used for assembling the secondary magnet into a main magnet module, and the main magnet module comprises U-shaped iron, a main magnet and a washer which are assembled; the device comprises a secondary magnetic guide gauge, the secondary magnetic guide gauge is of a hollow cylinder structure and comprises an upper guide portion, a middle positioning portion and a lower insertion portion, wherein the inner diameter of the guide portion is gradually decreased to be the same as thatof the positioning portion from top to bottom, the inner diameter of the positioning portion is matched with the outer diameter of the secondary magnet, and the outer diameter of the insertion portion is matched with the inner diameter of U iron. When the insertion part of the secondary magnetic guide gauge is inserted into the annular gap of the main magnetic module, relative positioning of thesecondary magnetic guide gauge and the main magnetic module is realized; and when the secondary magnet descends to the positioning part from the guide part of the secondary magnet guide gauge, relative positioning of the secondary magnet and the secondary magnet guide gauge is realized. According to the device, on the one hand, secondary magnetic jump can be avoided, and the assembly efficiency isimproved; on the other hand, the consistency and accuracy of the magnetic circuit can be improved.

The invention relates to a magnet arrangement (1) with a permanent magnet system comprising at least two ring-shaped magnet elements (2) arranged cylindrically symmetrically about the z-axis and stacked on top of each other in the z-direction and / or arranged concentrically, the ring magnet elements are composed of individual magnet segments (3) such that the magnetization directions of the individual segments in the rings extend parallel in the x-y plane perpendicular to the z direction, each The ring magnet elements (2) can be aligned relative to each other in the z-direction and have a Halbach magnetization structure, characterized in that the ring magnet elements are fixedly prefabricated before final assembly in the magnetic resonance system and their respective magnets The segments are immovably fixed to one another, the ring magnet elements are arranged displaceably relative to each other in the x-y plane, and the ring magnet elements are mounted rotatably and / or tiltably relative to each other.

The invention discloses a physical function rehabilitation training pile, and relates to the technical field of rehabilitation training. The training pile comprises a training unit and a control unit;the training unit comprises a training pile mechanism and a plurality of wearable mechanisms; the training pile mechanism comprises a chassis; a plurality of magnetic training devices are axially arranged on each positioning plate; a plurality of horizontal electromagnetic coils are respectively uniformly installed on front and back sides of a mounting base body; the wearable mechanisms comprisebinding belts; the middles of the binding belts are fixedly connected with cylindrical installing shells; permanent magnets are slidably in sealing arrangement inside the installing shells; air guiding pipes are communicated with the left and right sides of the back portion of each installing shell; the control unit comprises a panel. The physical function rehabilitation training pile has the advantages that the training pile can carry out damping training or guiding training on patients, human bodies of patients can be fixed, vibration massage can be performed during the training, airflow canbe synchronously generated to strengthen air flow, and the comfort is improved.

The invention aims to provide a powder coating having magnetic polyester resin and a preparation method of the powder coating. The powder coating is prepared by a combination of the magnetic polyesterresin, TGIC, a levelling agent, a pigment, an inorganic filler and an auxiliary agent. Compared with a traditional powder coating, when electrostatic spraying is performed, the powder coating provided by the invention can overcome a Faraday cage effect, makes simple workpieces have a greatly improved coating rate when spray coating is performed, and makes complex workpieces, grooves and internalcorners coated effectively to form a complete coating film; and when the powder coating prepared from the magnetic polyester resin is electrostatically sprayed, after the front end of an electrostaticspray gun generates corona discharge, ferroferric oxide in the polyester resin is magnetic and forms magnetic attraction with a sprayed workpiece, the repulsive force of the Faraday cage effect is overcome, so that the powder coating is easily adsorbed onto the complex workpieces, the grooves and the internal corners, and the coating rate of the powder coating is greatly improved.

The invention relates to the technical field of preparation of polymer electrospun fibers by adopting an electrostatic spinning technique, and provides an electrostatic spinning device which comprises a liquid supply device, a liquid distribution device, a plurality of electrostatic spinning nozzles, a high-voltage power supply, an auxiliary gas generating device, a cylindrical guiding device and a double-net-cylinder collector, wherein the auxiliary gas generating device comprises an air feed pump, an air tube and a vent hood, and the vent hood is communicated with the air feed pump through the air tube, so as to form an auxiliary airflow channel; the plurality of electrostatic spinning nozzles are uniformly distributed in the vent hood; the cylindrical guiding device is arranged below the auxiliary gas generating device; the double-net-cylinder collector is arranged inside the cylindrical guiding device. The electrostatic spinning device introduces auxiliary airflow to promote jetting and stretching of jet flow, and utilizes the squeezing effect of the airflow to guide spinning nanofibers to perform multilayered three-dimensional deposition in the double-net-cylinder collector, so as to realize quick manufacturing of a columnar nano-fiber filter, and promote the application of the electrostatic spinning technique in the field of filtration.

The invention discloses a magnetic ring assembly fixture for a terahertz traveling wave tube periodic permanent magnet system, which comprises a base, a lower pole shoe groove arranged on the base, and a lower magnet arranged in the lower pole shoe groove and coaxial with the lower pole shoe groove The ring groove, the lower copper wire groove set in the lower magnetic ring groove and coaxial with the lower magnetic ring groove, the upper cover arranged on the base, the upper pole shoe groove arranged on the upper cover, and the upper pole shoe groove And coaxial with the upper pole shoe groove magnetic ring groove and the upper copper wire groove which is arranged in the upper magnetic ring groove and coaxially arranged with the upper magnetic ring groove. The beneficial effects of the present invention are: the present invention can improve the positioning accuracy of the half-ring magnetic block, and is beneficial to overcome the repulsive force of the half-ring magnetic block, significantly improves the assembly process of the magnetic ring, and improves the operability and convenience of assembly , reduces the difficulty of assembly, saves manpower and time, improves the efficiency of the TWT magnetic ring assembly process, and effectively avoids safety risks and hidden dangers in the assembly process.

The invention relates to a polypropylene antistatic composite material and a preparation method thereof, belonging to the technical field of polypropylene composite materials. The invention is characterized in that the polypropylene antistatic composite material contains conductive aluminum borate whiskers, and is AlB[w] / PP for short. The preparation method comprises the following steps: proportionally adding aluminum borate whiskers into distilled water, adding concentrated hydrochloric acid so that the acid concentration reaches 0.6-1.2 mol.L<-1>, proportionally adding tin tetrachloride andurea, heating the mixed liquor to 90-110 DEG C, reacting for 1-3 hours, filtering, washing to remove unreacted substances, drying the filter cake, and calcining to obtain conductive aluminum borate whiskers (AlB[w] for short); and proportionally mixing the AlB[w] and polypropylene, mixing, crushing, putting the mixture in a die, putting the die in a muffle furnace at 180-200 DEG C, keeping the temperature for 30-60 minutes, carrying out die forming in a flat vulcanizing machine, and depressurizing and stripping when the temperature of the die drops to below 60 DEG C, thereby obtaining the AlB[w] / PP.

The invention discloses a method for preparing nickel inner electrode slurry for multilayer chip ceramic capacitors, which comprises the following steps: (1) Ni powder containing no residual dispersant and BaTiO containing no residual dispersant are mixed 3 Powder, NiW alloy powder without residual dispersant, organic solvent and dispersant are evenly mixed to obtain slurry A; (2) Sand mill slurry A with a sand mill to obtain slurry B; (3) To slurry Add binder to material B and mix evenly to obtain slurry C; (4) Emulsify slurry C with an emulsifying machine to obtain the nickel internal electrode slurry for multilayer chip ceramic capacitors. The nickel inner electrode slurry prepared by the invention has high dispersibility, simple preparation process and low cost, and can realize industrialized production.