64results about How to "Avoid mechanical friction" patented technology

The invention relates to a rough-fine-movement laminated workbench with laser interferometer measurement. The workbench is mainly used in a lithography system. The laminated workbench comprises a fine movement bench, a rough movement bench, a balancing block, four vibration isolators, and a measuring frame. The rough movement bench comprises a rough movement bench frame, four moving iron electromagnetic driving modules, and four air bearings. The fine movement bench is arranged at the middle of the rough movement bench frame. The system also comprises a laser interferometer measurement assembly used in position feedback between a sheet bearing stage of a six degrees of freedom (DOF) positioning device and a pedestal. The laser interferometer measurement assembly is composed of a laser source, an optical path assembly, and a laser interferometer. With the laser interferometer measurement assembly, real-time six-DOF measurement can be carried out upon the movement part of the device. The workbench provided by the invention has a simple and compact structure. The mass of the movement parts is light. A rough movement bench driving motor adopts a lengthened rectangular coil group. On a basis that movement precision is not influenced, manufacturing difficulty of a large-scale halbach magnetic steel array is avoided, and driving motor stroke is increased, such that movement precision is improved.

The invention relates to the technical field of molecular distillation and discloses a molecular distiller. The molecular distiller comprises a motor, a distillation cylinder, a heating jacket located outside the distillation cylinder, and a condenser and a membrane scraper located in the middle of the distillation cylinder. The membrane scraper is driven by the motor and is arranged in the distillation cylinder and close to the inner wall of the distillation cylinder. The membrane scraper comprises several membrane scraper groups. The membrane scraper group at least comprises a scraper plate and a flexible scraper blade, the flexible scraper blade is arranged at the rear end of the scraper plate, and the scraper plate and the flexible scraper blade slide along a rotation direction of the membrane scraper. The scraper plate and the distillation cylinder inner wall form an appropriate space and do not contact with each other. A part of the flexible scraper blade fits to the inner wall of the distillation cylinder. The molecular distiller utilizes a combined structure of the rigid scraper plate and the flexible scraper blade, forms a uniform liquid material membrane, prevents mechanical friction between the membrane scraper and the evaporation surface, and is particularly suitable for molecular distillation of the heat-sensitive material and/or the mechanical friction sensitive material.

The invention discloses a firework with an integral module explosive filing structure in an open mode and a preparation method thereof. The explosive filling structure disclosed by the invention comprises a shell, a delay fuse, bright beads and an open explosive module, wherein the shell, the delay fuse and the bright beads are made of traditional materials. The preparation method of the fireworkwith the integral module explosive filling structure in an open mode comprises the following steps: preparing a slurry containing an organic adhesive, an ignition performance reinforcing agent and granular micro-pore firework explosive granules; then, filling the bright beads and the slurry into the ball shell of the firework according to the needed structure, thus forming an integral module structure; and finishing the preparation of the firework according to a conventional method. By adopting the integral module explosive filling structure and the explosive filling method, the gap between the open explosive module and the bright beads is basically eliminated; the ignition rate of the bright beads can be improved; the mechanical friction action among the granules in the explosive fillingcourse and storage and transportation course of the granules is avoided; and the safety of the preparation course and storage and transportation course of fireworks is improved.

The invention relates to the technical field of medical instruments, and provides an interventional ventricular assist device which comprises an interventional tube, a motor assembly, a liquid injection barrel and an impeller assembly. The interventional tube is provided with a liquid inlet and a liquid outlet, the impeller assembly comprises an impeller, the impeller is contained in the intervention pipe, the impeller can rotate so that liquid can enter the intervention pipe from the liquid inlet and flow out from the liquid outlet, the motor assembly can generate a rotating magnetic field todrive the impeller to rotate, the liquid injection barrel can allow perfusate to be injected into the interventional tube, and the perfusate injected through the liquid injection barrel can provide thrust for the impeller assembly, so that the impeller can suspend and rotate in the interventional tube under the combined action of the motor assembly and the perfusate. According to the interventional ventricular assist device, suspension arrangement of the impeller can be achieved, mechanical collision of the impeller is avoided, the risk of blood compatibility is reduced, and thrombus is prevented from being formed at the bearing.

The invention discloses an automobile electronic knob gear shift, which comprises a knob (10), a microprocessor (20), a first motor driving module (31), a second motor driving module (32), a third motor driving module (33), a motor (40), a reduction gearbox (50), a motor position feedback module (60), a nonvolatile memory (70) and a power supply (80), wherein three independent physical channels are formed between the microprocessor (20) and the three motor driving modules for failover; and the motor position feedback module (60) has two detection means of pulse monitoring and rotation angle detection. The gear shift completely replaces a shifter and a gear stick in the conventional vehicle and has the advantages of simple structure and convenience of implementation; moreover, the mechanical friction of the gear stick is avoided, and the use space in a carriage is enlarged.

The invention discloses a steering device of a large wind driven generator. The steering device comprises blades (1), a wind turbine industrial controller (2), a wind indicator (3), a lightning rod (4), a wind speed measurement instrument (5), a fan steering flange disc (6), a stepper motor rotating point (7), a wind turbine tower drum (8), and a power transmission and data transmission integrated device (9). The steering device provides a function of measuring basic data of wind energy, including wind speed, wind direction and the like, and further has a lightning protection function; the working principle of the device is as follows: the wind indicator (3) and the wind speed measurement instrument (5) transmit the measured wind energy data to the wind turbine industrial controller (2) in the wind driven generator; the wind turbine industrial controller (2) analyzes the data, and compares the data with the wind meeting direction of the fan steering flange disc (6) to find out the difference and the angle change; and the wind turbine industrial controller (2) gives a starting command to a stepper motor for adjusting the wind meeting angle of the wind turbine to realize the maximal wind energy utilization.

The invention discloses a display shell preparation method with pellet-shaped smokeless firework explosive as the explosive. The method comprises the following steps that first bright beads are lined on the inner side of the spherical shell of the display shell, and then the pre-prepared pellet-shaped explosive and a small amount of explosive which contains magnesium-aluminum alloy powder are mixed together, wrapped by a piece of thin paper and charged to the semi-spherical shell; the other half shell of the display shell is filled in the same charging order; and finally the two halves of spherical body are buckled, and the paper is pasted on the surface of the shell and dried. According to the preparation method of the display shell, area ignition is facilitated, the problems that the burning is not full or medicine particles are left when granular microporous firework explosive serves as the explosive are thoroughly solved, the explosion diameter of the display shell is greatly increased, and the ornamental effect is effectively improved.

The invention discloses an optical fiber guide fixator used in the communication field, and relates to the technical field of optical fiber fixation. The optical fiber guide fixator comprises a fixingblock and a guide block, the fixing block is provided with a sliding groove, and the guide block is slidably connected in the sliding groove. The bottom of the sliding groove is provided with a firstthrough groove, and the side, close to the fixing block, of the guide block is provided with a second through groove. An arc-shaped ring groove is formed at one side, deviating from the fixed block,of the guide block, one side of the arc-shaped annular groove is communicated with the second through groove, and the other side penetrates through the guide block to form an opening on the guide block. A rotating ball is arranged in the arc-shaped annular groove and abuts against the opening, a third through groove is formed at the side, close to the opening, of the rotating ball, the diameter ofthe third through groove is smaller than that of the opening, and the third through groove is communicated with the second through groove. The optical fibers are arranged in order according to the number or groups, and the rotating ball is adjusted for fixing according to the different connection extension directions of the optical fibers, thereby improving the beauty of the interface end of a device or the outlet end of a terminal box, and facilitating the operation of a worker during the later inspection and maintenance.

The invention relates to a method and device for improving purity of a stalk filament prepared through microwave expansion, and particularly to the technical field of manufacturing the stalk filament from a tobacco stalk by utilizing the microwave expansion, belonging to the technical field of tobacco manufacturing. The method comprises the following steps of: A, setting a wind sorting procedure after a shredding procedure in the process of manufacturing stalk filaments from tobacco stalks through the microwave expansion, removing high-density stalk filaments through a wind sorting device in the wind sorting procedure, and carrying the stalk powder in a dust removal system by a wind force in the wind sorting device; B, removing sheet-like stalk filaments from the material without the high-density stalk filaments and stalk powder by a screening device in a screening procedure; and C, collecting materials without the high-density stalk filaments, the sheet-like stalk filaments and the powder after the wind sorting procedure and the screening procedure so as to obtain expanded stalk filaments with relatively high purity.

A transmission device using a permanent magnet, belongs to the technical field of the mechanical transmission, particularly to a mechanical apparatus for converting the mechanical straight line motion into the transmission by the magnetic force of the permanent magnet, including a power output part and a power driving part, wherein the power output part has a non-magnetic principal axis supported on the bearing, the surface of the principal axis is fixed with a plurality of adsorbed sheets in the helical form axially; the driving part is provided with a guide wheel and a transmission belt towed by the outside force; a plurality of permanent magnets are fixed on the outer surface of the transmission belt; the transmission belt in the working area is parallel with the axial of the principal axis; a gap is arranged between the permanent magnet and the adsorbed sheets; the distance between the neighbor permanent magnet is equal to the helical pitch of the adsorbed sheets on the principal axis. In use, the straight line motion of the permanent magnet is converted to the rotation of the principal axis. The device is used in the mechanical technical field for changing the mechanical motion state.

The invention provides a magnetic suspension geothermal heat pump heat exchange system. The system is provided with a heat exchange channel formed underground, and comprises a condenser, a magnetic suspension compressor, a heat exchange pump, a liquid inlet pipe and an air outlet pipe which are arranged on the upper portion of the heat exchange channel, and an evaporator arranged in the heat exchange channel. One end of the condenser extends into the evaporator through the liquid inlet pipe. The upper end of the evaporator sequentially communicates with the magnetic suspension compressor and the other end of the condenser through the air outlet pipe. When heat exchange is needed, a low-temperature working medium is injected into the underground heat pipe evaporator through the liquid inlet pipe, and the low-temperature working medium exchanges heat with underground rock strata through the outer wall of the underground heat pipe evaporator, absorbs heat and is vaporized through the underground heat pipe evaporator and then is conveyed into the condenser for heat supply and heating through the magnetic suspension compressor. By adoption of the magnetic suspension compressor, mechanical friction during operation of the compressor is avoided, the heat exchange efficiency in a unit time is improved, the number of maintenance factors is decreased, and accordingly the maintenance frequency is reduced.

The invention discloses an axial force self balancing multistage centrifugal pump. The self balancing of impellers in the axial direction is realized by arranging the impellers in a pump body in a symmetrical mode, namely, the axial force generated by the impellers at different levels cancels out each other, thus reducing the mechanical friction generated in the running process of the multistage centrifugal pump owing to the axial force, prolonging the no failure operation time of the centrifugal pump and reducing the equipment maintenance cost of users.

The invention relates to a method and a device for improving the quality and the yield of cut stems produced through microwave expanded tobacco stems, particularly to the technical field of cut steam production through microwave expanded tobacco stems, and belongs to the technical field of tobacco production. According to the method and the device, in the expanded tobacco stem cutting process, a winnowing process exists between a slicing process and a cutting process, expanded tobacco stems which are not cut into stem pieces yet, expanded stem pieces of high density or tobacco stem powder are separated through a wind separation device, then, separated materials are subjected to slicing in the slicing process again, consumption that the expanded tobacco stems are sliced into the stem pieces in the cutting process is reduced, setting of follow-up processes to reject the stem pieces is avoided, and the yield of cut steam products in the expanded tobacco stem cutting process is improved. The stem pieces of even density can be obtained after separation, the produced cut stems is high in filling value, even in density and capable of reducing in-batch fluctuation of the release amount of cigarette tar in smoke, improving inter-batch stability of the release amount of cigarette tar in smoke and reducing open seams during combustion of cigarettes when being added to cigarettes.

The invention relates to a permanent magnet coupler limiting structure which comprises a conductor rotor disc and a permanent magnet rotor disc. The conductor rotor disc comprises a driving side conductor disc and a driven side conductor disc which are fixedly connected through a bolt, the permanent magnet rotor disc is arranged between the two conductor discs and provided with a permanent magnet, the conductor rotor disc is provided with a conductor plate, and a fixed air gap is reserved between the permanent magnet and the conductor plate. The permanent magnet coupler limiting structure is characterized in that limiting blocks are symmetrically arranged on the inner side of the driving side conductor disc and the inner side of the driven side conductor disc, roll balls are embedded on the limiting blocks in a rolling mode, limiting slideways are arranged at the positions of two sides of the permanent magnet rotor disc corresponding to the limiting blocks, fixed intervals are reserved between the limiting slideways and the roll balls, and the fixed air gap is larger than the fixed intervals. The limiting blocks are provided with spherical grooves, and the roll balls are embedded in the spherical grooves. The permanent magnet coupler limiting structure has the advantage that direct mechanical friction between the conductor discs and a permanent magnet disc is avoided.

The invention provides a multifunctional tunnel arch bracket operating trolley, which comprises a gantry system, an arch bracket adjusting device, and arch bracket adjustment top tightening device. The multifunctional tunnel arch bracket operating trolley is characterized that the multifunctional tunnel arch bracket operating trolley has effects of the simple overall structure; the gantry system comprises an upper gantry and a lower gantry, and the upper gantry and the lower gantry can be extended and contracted relative to each other to adjust the height of the whole gantry system, so that the multifunctional tunnel arch operating trolley can meet operation in tunnels with a variety of cross-section sizes, so the universality is high; the combination of the arch bracket adjusting device and the arch adjustment top tightening device can adjust the arch bracket to a corresponding installation position, can realize the quick and accurate installation of the arch bracket, decreases laborintensity, and increases efficiency; and the arch bracket adjustment top tightening device comprise a plurality of adjustable lateral platforms, which not only can serve as operating platforms for manual pneumatic rock drills but also can meet arch bracket installation operations of a variety of construction methods for the same tunnel such as full-section, two-step and three-step excavation, so the multifunctional tunnel arch bracket operating trolley is high in universality, and can be repetitively utilized, reducing cost.

The invention discloses a method and equipment for removing high-density tobacco stem in microwave expansion tobacco stem, in particular relates to the technical field of manufacturing cut stems by utilizing the microwave expansion tobacco stems and belongs to the technical field of tobacco manufacturing. According to the tobacco stems subjected to microwave expansion, the tobacco stems with low expansion rate and high density in the microwave expansion tobacco stems are removed through the wind action, wherein the wind speed is 8-14m/s during separation. The expansion tobacco stems with uniform density can be obtained after separation, the manufactured cut stem is high in filling value and uniform in density, after the cigarette is added, the within-batch fluctuation of the cigarette smoke tar release amount can be reduced, the within-batch stability of the cigarette smoke tar release amount is improved, and the open seam phenomenon during cigarette combustion is reduced.

The invention relates to a leak-proof compression bar type temperature control valve, belonging to the technical field of heating and ventilation valves. The control valve is characterized in that a water outlet in the valve body is matched with a piston component for opening or closing the valve, and the lower outer edge of a seal corrugated pipe is compressed and sealed by the bottom outer edgeof a valve cap on a step in the middle of a valve jacket. The valve can automatically control the indoor temperature, and because the bottom outer edge of the seal corrugated pipe is sealed by the bottom outer edge of the valve cap in the middle of the valve jacket, the valve only does extension and contraction movement in working, thereby avoiding mechanical friction and solving the problem of leak caused by abrasion of a valve rod and a sealing component in the prior art.

The invention discloses a tube bus split wire clip. The device belongs to the technical field of electric fittings, and solves the problems of weak gripping force, large magnetic loss and poor corona resistance of a tube bus wire clip in the prior art. The tube bus split wire clip comprises a tube bus clip and a number of flexible wire clips. The tube bus clip comprises first and second tube bus clips. Reinforcement devices are arranged in first and second tube bus clips. According to invention, the reinforcement devices are arranged to improves the contact and gripping force of the wire clip and avoid mechanical loss caused by mechanical friction produced by the contact of two parts; an eddy current flux ring is effectively blocked by the reinforcement devices, which avoids magnetic loss; and a support body and a compaction block are in arc transition, which prevents point discharge, and ensures the anti-corona performance of the whole wire clip.

The invention relates to an axial electromagnetic sealing device which is used for shutdown of the machine and is characterized in that the device mainly comprises a stationary sealing ring, a movable sealing ring, an electromagnet and an elastic return component. The stationary sealing ring is fixedly sleeved on a sealed rotation shaft, one end of the stationary sealing ring is provided with a first sealing face arranged around the rotation shaft; the movable sealing ring is sleeved outside the rotation shaft and is axially supported on the sealed case in a sliding way, the movable sealing ring is provided with a second sealing face which faces the stationary sealing ring and is arranged around the rotation shaft, the first sealing face and the second sealing face form a sealing mouth which cuts off the leakage; the movable sealing ring is a soft magnet or is provided with a soft magnet, the electromagnet is fixed on the case and acts on the movable sealing ring; the elastic return component is arranged on the pedestal and acts on the movable sealing ring; the movable sealing ring and the stationary sealing ring are separated and have no mechanical friction between each other during the operation of the machine, and the electromagnetic seal does not work; when the machine is shut down, the movable sealing ring and the elastic sealing cover all contact closely with the stationary sealing ring, and thus the back-flowing material can be effectively sealed when the pump is shut down.

The invention discloses a magnetic suspension water turbine-generator set, comprising a water turbine, a generator installed on the water turbine, an exciter and a magnetic suspension mechanism, wherein the water turbine comprises a water turbine volute, a water turbine top cover, water turbine guide vanes, a water turbine shaft and a water turbine rotor, and the water turbine shaft is fixedly connected with a generator shaft; the magnetic suspension mechanism comprises a magnetic suspension upper guide positioning bearing sleeving on a thrust collar, a magnetic suspension lower guide positioning bearing sleeving the lower end of the generator shaft, a magnetic suspension thrust bearing sleeving the generator shaft and a magnetic suspension water turbine positioning bearing sleeving the water turbine shaft. By arranging the magnetic suspension thrust bearing, the magnetic suspension upper guide positioning bearing and the magnetic suspension lower guide positioning bearing, the rotating part of the water turbine-generator set is suspended in air, the water turbine-generator set runs without any mechanical friction, mechanical friction of the bearings is avoided, the efficiency of the generator set is improved, the production cost and the operation and maintenance cost are reduced, and the economic benefit is improved.

The invention provides a washing machine inner drum limiting device and method and a washing machine. The washing machine inner drum limiting device comprises a magnetic limiting device arranged between the opening ends of the inner drum and the outer drum of the washing machine, and a limiting shaft arranged at the bottom of the washing machine, wherein the magnetic limiting device comprises a primary coil arranged upwards along the circumferential direction of the outer drum, and a magnetic conducting unit correspondingly on the inner drum, the limiting shaft is connected with the inner drum, and the inner drum rotates to drive the limiting shaft to rotate. By limiting both ends of the inner drum through the magnetic limiting device and the limiting shaft, shock at the open end of the inner drum can be effectively avoided, and further the mechanical friction between the open end of the inner drum and the outer drum. Besides, the washing machine inner drum limiting device is simple in structure and can effectively reduce the integral size of the washing machine.

The present invention relates to a domestic multifunction health care bed. Said bed is divided into upper, middle and lower three-layer structure, its upper layer is spring mattress, middle layer is sport bed frame and lower layer is base seat, in which the supporting feet of the sport bed frame are suspended from supporting frame of base seat, and on the base seat of sport bed frame the electromagnetic drive coils, electromagnetic detection induction coils and magnetic iron blocks are respectively mounted, and on the sport bed frame or base seat the electric control devices are respectively mounted. Said invention has several functions, and integrates the sport, rest recreation and body-building so as to raise the sleeping quality.