62results about How to "No mechanical contact" patented technology

The invention provides a speed changing magnetic pump, which comprises a pump body, a speed changing magnetic transmission device installed in a casing cavity and a driving motor. The speed changing magnetic transmission device comprises an inner magnetic rotor, an outer magnetic rotor, an isolation sleeve and a magnetic field adjusting ring. The inner magnetic rotor comprises an inner magnetic rotor magnet ring and an inner magnetic rotor magnet core, the outer magnetic rotor comprises an outer magnetic rotor magnet core and an outer magnetic rotor magnet ring which forms an annular cavity with the inner magnetic rotor magnet ring, and the isolation sleeve fixedly connected with a pump body is arranged in the annular cavity. The magnetic field adjusting ring fixedly installed on the isolation sleeve is an annular body formed by connecting a plurality of magnet core blocks and a plurality of epoxy blocks at intervals and used for adjusting magnetic fields of the inner magnetic rotor and the outer magnetic rotor to enable the rotating speed of an output rotating shaft connected to an impeller in a pump body to be different from the rotating speed of an input rotating shaft connected to the driving motor.

The invention discloses a magnetic suspension linear motion platform based on the combination of permanent magnets and electromagnets. The electromagnets are vertically installed in a suspensoid, array permanent magnets are arranged on the surface of a guide rail, the suspension of the suspensoid can be realized by utilizing the principle of holopolarity repulsion between the electromagnets and the permanent magnets; and meanwhile, an eddy current displacement sensor is combined to realize the stable suspension of the suspensoid above the guide rail; two pairs of electromagnets are horizontally installed in the suspensoid, which can provide guidance for the linear motion of the platform by combining with the eddy current displacement sensor; a linear motor stator is fixed on a base, a linear motor rotor is fixed on the suspensoid, a grating ruler is arranged on the surface of the guide rail, and the reading head of the grating ruler is installed on the suspensoid, thus the precise linear positioning motion of the suspensoid can be realized. The platform provided by the invention can realize the functions such as super cleaning, high speed, long stroke, precise positioning motion and the like, which can not be realized by the traditional scheme that a rotary servo motor is utilized to drive, a precise ball screw is utilized to transmit and a slide guide is utilized to support, and has the advantages of good load bearing characteristic and stable suspension performance.

The invention discloses a permanent-magnetic suspension supporting cylindrical linear motor. The linear motor comprises a permanent-magnetic bearing stator permanent-magnetic ring, a mover permanent-magnetic ring, a cylindrical linear motor stator and mover permanent-magnetic ring array, a linear displacement sensor, fastening screws and a corresponding linear motor drive system. A linear motor mover is supported by adopting a passive axial permanent-magnetic bearing, and no mechanical contact between the mover and a stator is produced by means of automatic centering and repulsion action of a radial permanent-magnetic bearing, so friction (theoretically no friction is produced) is reduced, lubricating oil is not needed, an active control coil is not needed, and heat is not produced; and compared with a motor supported by a mechanical bearing, the linear motor has better dynamic performance, easy maintenance and long service life. Once the passive magnetic bearing is designed and sized, the rigidity of the magnetic bearing is determined and changed along with the moving distance and is lower than that of an active bearing, and the precision is limited.

Provided is a magnetic suspension gravity compensator, belonging to the technical field of magnetic suspension and solving the problem that an air spring is taken as a gravity compensating device, so that the device is complex in structure while being applied to a vacuum environment. The magnetic suspension gravity compensator includes a stator and a mover, an air gap is arranged between the stator and the mover, the stator includes a stator frame, a stator cross beam, and a stator permanent magnet, the mover includes a mover frame and a mover base, the mover frame is fixed to the lower surface of the mover base, the inside of the mover frame is provided with a mover permanent magnet rhombus array, the mover permanent magnet rhombus array is composed of four mover permanent magnets, the mover permanent magnet rhombus array forms a cavity, and the stator cross beam penetrates through the cavity. The compensation of the motion quality in the magnetic suspension system is achieved by the mutual active force between magnetic fields generated by the mutual active force between the stator permanent magnet and the mover permanent magnet rhombus array, so that the magnetic suspension can be realized. The magnetic suspension gravity compensator is applied to gravity compensation.

The invention provides an active mass magnetic activation vibration controlling device which comprises a mass block and a control unit, wherein a DC exciting coil is arranged at the bottom portion ofthe mass block as the secondary coil of the linear motor, a sliding rail bed is arranged beneath the mass block, a long stator winding is arranged in the sliding rail bed as the primary coil of the linear motor. The advantages of the invention are sensitive reaction, simple structure, low noise and high degree of precision.

The invention relates to a siphoning type fish sucking pump which comprises a fish storage box body, a water injection pipe (2), a sucking pipe (3) and a fish sucking pipe (1). A water sealing cover is arranged on the upper end face of the fish storage box body, a valve F3 is arranged on the water sealing cover, the fish storage box body is communicated with the water injection pipe (2), a valve F4 and a water injection pump P are arranged on the water injection pipe (2), the fish storage box body is communicated with the sucking pipe (3) which is provided with a valve F1 and a sucking pump P2, a fish partitioning net is arranged on the connection portion of the sucking pipe (3) and the fish storage box body, the fish storage box body is communicated with the fish sucking pipe (1) which is communicated with the upper end face of the fish storage box body, and the water injection pipe (2), the sucking pipe (3) and the fish sucking pipe (1) extend into the position below a water level where fish sucking is to be carried out respectively. The siphoning type fish sucking pump is simple in structure, low in manufacturing price and suitable for being widely popularized, water pressure changing is low, fish does not pass through operating parts, mechanical contact is avoided, fish body damage is low, energy loss is low, efficiency is high, and the labor intensity of live fish catching can be lowered.

The invention relates to an ultrasonic flaw detection method of a train wheel, and in particular relates to a liquid guide ultrasonic probe array flaw detection test method of a train wheel. The method comprises the following steps of: sequentially distributing a plurality of probes under a rail surface at intervals, and realizing the direct coupling of an ultrasonic wave with a wheel set tread through wave carrying liquid by liquid guide ultrasound; and forming a fan-shaped scanning region by each probe due to a position relationship between each probe after the region above the probe is ground by the wheel and the wheel, and synthesizing all the fan-shaped scanning regions together to form a scanning detecting region containing the whole wheel, wherein the ultrasonic wave is conducted to the wheel from the probes through a liquid medium to complete the scanning type ultrasonic flaw detection of the whole wheel in a manner of non-direct contact. The ultrasonic flaw detection method has the advantages of being extreme in coupling performance, and stable and reliable; the method is high in detecting performance, wherein the detecting density is 10-20 times as thick as that of the current array type equipment, and the quantity of the probes is 1 / 5-1 / 10 that of the current array type equipment; and the method is free from mechanical contact and mechanical motion parts, so that the equipment can be convenient to install and maintain.

The invention discloses magnetic driving type taper hole inner surface strengthening equipment in the field of part surface treatment. A workpiece is vertically arranged at the bottom in a cylinder body, a taper hole with a large end facing right above is formed in the workpiece, a top cover is arranged right above the workpiece, a top cover through hole communicating with the taper hole is formedin the center of the top cover, a piston is arranged in the top cover through hole, the piston is coaxially and fixedly connected to the lower end of a connecting rod, and the upper end of the connecting rod extends upwards out of the top cover to be fixedly connected to a sliding block; and the sliding block is in sliding connection with a vertical guide rail, the sliding block is fixedly connected to one end of a transmission rod at the same time, the other end of the transmission rod is fixedly connected to the edge of a disc which is horizontally arranged at the center shaft, the disc iscoaxially and fixedly connected to one end of a reversing sheet, the other end of the reversing sheet is fixedly connected to a coil, the coil is horizontally placed between the pair of magnets, the reversing sheet is in contact with an electric brush, and the electric brush is connected to a power supply through a wire; and volume alternating is driven by magnetic force, the pressure of the liquid in the volume is changed so as to perform cavitation strengthening, and the reinforcing effect is good.

The invention discloses a non-contact valve plate flatness detection device and method. An X-direction guide rail is fixed on a cross beam of a portal frame; a Z-direction guide rail is fixed on an X-direction guide rail sliding block; and a laser displacement sensor is fixed on a Z-direction guide rail sliding block. The laser displacement sensor can be adjusted to an optimal measurement distanceand workpieces with different heights can be measured. A valve plate is arranged on an air floatation turntable; and the X-direction guide rail sliding block is moved to change the distance from thelaser displacement sensor to the center. The air floatation turntable rotates to carry out measurement for one circle with 12 points; after measurement of two circles, measured data are uploaded to acomputer; error compensation and cross criterion plane fitting of a minimum containment area method are performed by using an application program; and calculation is performed to obtain a final planeness error value displayed on a display screen. Therefore, flatness detection can be automatically completed; more data can be obtained; the actual surface of a measured workpiece can be accurately reflected; and no measuring head wear error exists.

A bottle blank rotating apparatus for the heating system of blowing bottle blanks is composed of a plane plate, multiple bottle blank holders installed on said plate in rotary mode, multiple magnets installed eccentrically to said bottle blank holders (one for one), and an active plate with multiple magnets relative to the magnets on bottle blank holders. When said active plate and plane plate is parallelly swinging along a circular tracing, the bottle blank holders and their bottle blanks are rotating under the action of magnetic attraction.

The invention provides an angular deviation type double-multi-core optical fiber cell optical motor system with cell capturing and rotating functions. The optical motor system includes a laser 1 generating a desired light source, an optical fiber beam splitter 2, an attenuator 3, multi-core optical fiber beam combiners 4-1 and 4-2, multi-core optical fiber arms 5-1 and 5-2, an experiment operationpool 6, and a microscopic imaging system 7 for observing the experiment operation process; and the multi-core optical fiber arms 5-1 and 5-2 are respectively connected with the two multi-core opticalfiber beam combiners and are used for capturing and rotating cells. The angular deviation type double-multi-core optical fiber cell optical motor system can be used for capturing single cells or multiple cells, rotating the single cells or multiple cells in the opposite direction, capturing and arranging micro-particles, and providing power for a micro-robot or a micron-sized instrument. The angular deviation type double-multi-core optical fiber cell optical motor system can be widely applied to the fields of cell analysis, drug development and microscopic manufacturing.

The invention discloses a silicon micro two-dimension acceleration sensor based on a self-resonant technology. The silicon micro two-dimension acceleration sensor based on the self-resonant technology comprises a substrate, fixed support of a cylinder structure, a cloverleaf-shaped inertial mass block, PN junctions and resonant micro beams, wherein the inertial mass block is suspended at the middle part of the fixed support through four symmetrically resonant micro beams and are positioned right above the substrate; and four PN junctions are symmetrically arranged on the substrate and are respectively positioned under the four resonant micro beams. The optical shock excitation of the resonant micro beams is realized by the silicon micro two-dimension acceleration sensor based on the self-resonant technology under the condition that a high-accuracy optical resonant cavity needs not to be processed, and the measurement for the acceleration can be realized through the differential frequency detection of the resonant micro beams; the whole silicon micro two-dimension acceleration sensor is of a symmetrical micro structure, and the sensitivities at two detection directions can be guaranteed to be consistent; larger sensitive mass can be realized under a limited volume; a frequency signal can be directly output, high anti-jamming capacity and stability are provided, and a processing circuit is simplified; and the mechanical contact does not exist between an exciting source and a vibrating element, the sensitivity is high, and the accuracy is high.

The embodiment of the invention provides a heat-dissipating device, a balance control method and a controller. The heat-dissipating device generates axial magnetic force in the axial direction of a main shaft of a motor when an axial magnetic bearing winding of an axial magnetic bearing is powered on and the heat-dissipating device generates radial magnetic force in the radial direction of the main shaft of the motor when a radial magnetic bearing winding of a radial magnetic bearing is powered on, so that the main shaft of the motor is supported by the axial magnetic bearing and the radial magnetic bearing in a suspended mode through the axial magnetic force and the radial magnetic force and the main shaft of the motor is located in the center of the position. The main shaft of the motor is controlled to move to the center of the position so that the main shaft of the motor can be prevented from making mechanical contact with the axial magnetic bearing and the radial magnetic bearing and mechanical abrasion to the main shaft of the motor, the axial magnetic bearing and the radial magnetic bearing can be avoided, and therefore abrasion to the main shaft of the motor, the axial magnetic bearing and the radial magnetic bearing can be effectively relieved and the service life of the heat-dissipating device is effectively prolonged.

The invention discloses a teaching experiment device for demonstrating the performance of a dynamic vibration absorber. The teaching experiment device comprises a bottom plate; a vertical column fixedto the bottom plate; a cantilever beam having one end fixed to the top of the vertical column and the other end used as a free end on which a plurality of threaded holes are uniformly distributed along the length direction; an eccentric motor fixedly disposed on the top surface of the cantilever beam in such a way that the position of the eccentric motor can be adjusted; a contact exciter fixed to the bottom plate and directly below the cantilever beam; and a plurality of dynamic vibration absorbers fixed to the bottom of the cantilever beam by dynamic vibration absorbers fixing blocks in such a way that the positions of the dynamic vibration absorbers can be adjusted and the number of the dynamic vibration absorbers can be selected. The teaching experiment device can adjust the mass, therigidity and the damping of the dynamic vibration absorbers, achieves the control of multiple dynamic vibration absorbers and multi-degree-of-freedom vibration, achieves passive and active hybrid dynamic vibration absorbers, and is simple in structure and easy to install.

The invention discloses a stepless type touch control switch. The switch comprises a switch main body as well as a manipulation area and a display area which are disposed on the switch main body; themanipulation area comprises a panel, a surface key layer, a light guide plate, a filling layer I and a PCB which are distributed sequentially from top to bottom; the PCB is provided with a switch control system; the switch control system comprises a touch sensor and a single-chip microcomputer; the line of the touch sensor is connected with buttons located on the PCB; the buttons on the PCB include single buttons, matrix buttons and rotary or sliding bar buttons; the touch sensor is connected with the single-chip microcomputer through an IIC serial bus; the output end of the single-chip microcomputer is connected with a load through a relay; and the back of the PCB is provided with a connection head connected with the load. According to the stepless type touch control switch of the invention, the rotary or sliding bar buttons are arranged on the switch panel, a user can slide his or her operation fingers at corresponding positions on the panel so as to realize the adjustment of the parameters of the load. The stepless type touch control switch is simple and convenient to use.

The invention relates to the technical field of optical manufacturing and in particular to a continuous zoom lens with a linear motor and a self-locking function. The lens comprises a movable lens, agrid ruler, a reading head, a control circuit, a sliding block, a sliding rail, a linear motor and a self-locking structure, the linear motor comprises a stator and a rotor, the stator comprises a first magnet fixing plate and a second magnet fixing plate, a magnet array is fixedly arranged on the first magnet fixing plate and the second magnet fixing plate, a gap is formed between the first magnet fixing plate and the second magnet fixing plate, an opening is formed in one side of the stator, and one side of the rotor extends out of the opening; the self-locking structure comprises a lockingmotor, a rotating shaft, a magnet and a locking block, magnetic conductive sheets are arranged on the two sides of the locking block in parallel, and the rotating shaft is provided with the magnet. The grating ruler and the reading head are adopted, the position information of the moving lens is obtained by reading the position information of the grating ruler, the control circuit controls the operation state of the linear motor according to the position information, and therefore closed-loop control over vertical movement of the moving lens is achieved.

The invention discloses a macro-micro dual-driving precision positioning device based on active vibration isolation, and a control method. The macro-micro dual-driving precision positioning device comprises a mechanical motion body unit, a detection unit and a driving control unit; the mechanical motion body unit comprises a positioning device base, a U-shaped table, a micro inching platform, an iron linear motor and an APA driver; the detection unit comprises an optical grating displacement sensor for detecting the displacement of the U-shaped table, a laser interferometer for detecting the displacement of the micro inching platform, and a capacitor displacement sensor for detecting the horizontal-direction vibration quantity, relative to the U-shaped table, of the micro inching platform;and the control unit comprises a linear motor servo amplifier, an APA linear amplifier, a motion control card, a computer and a data acquisition card. According to the macro-micro dual-driving precision positioning device, vibration isolation is conducted in an active mode, the influence of machine vibration on the positioning platform is effectively reduced, and higher-precision positioning canbe further achieved.

The invention relates to a siphoning type fish sucking device which comprises a fish storage box body, a water injection pipe (2), a sucking pipe (3) and a fish sucking pipe (1). A water sealing cover is arranged on the upper end face of the fish storage box body, a valve F3 is arranged on the water sealing cover, an impeller chamber is arranged in the fish storage box, impellers (5) are arranged in the impeller chamber and are driven by a motor (4), the fish storage box body is communicated with the water injection pipe (2), a valve F4 and a water injection pump P are arranged on the water injection pipe (2), the impeller chamber is communicated with the sucking pipe (3) which is provided with a valve F1, a fish partitioning net is arranged at a water inlet of the impeller chamber, the fish storage box body is communicated with the fish sucking pipe (1) which is communicated with the side face of the fish storage box body, a valve F2 is arranged on the fish sucking pipe (1), and the water injection pipe (2), the sucking pipe (3) and the fish sucking pipe (1) extend into the position below a water level where fish sucking is to be carried out respectively.

The invention discloses a homopolar permanent magnet linear synchronous motor, and belongs to the field of linear synchronous motors. The motor comprises a primary, a secondary and two air gaps formedbetween the primary and the secondary, the primary comprises a primary iron core, a primary armature winding, an excitation iron core and a permanent magnet; the secondary comprises a secondary backyoke iron core and iron core tooth pole arrays, the iron core tooth pole arrays are divided into two groups, the distance between two adjacent iron core teeth in the same group is tau, tau is the poledistance, the two groups of iron core teeth are arranged in a staggered manner, the staggered distance is tau, and the electrical angle difference is 180 degrees. The armature windings are wound on the primary iron core in a centralized mode, the permanent magnets are arranged at the left end and the right end of the primary iron core, the secondary structure is simple, eddy-current loss is small, efficiency is high, machining cost is low, self-suspension can be achieved, mechanical contact is avoided, the permanent magnet synchronous motor is suitable for occasions with large air gaps, suchas the field of high-speed maglev trains, and requirements for rails are reduced.

The invention discloses a microdissection technology of tobacco chromosomes. The microdissection technology is characterized by comprising the following steps: (1) preparing a chromosome specimen: after immersing ripe and full seeds of tobaccos, putting the seeds into a culture dish and germinating; after roots grow to 0.5cm to 1cm, scissoring fresh root tips from 9:00 to 11:00 in the morning; putting the roots into a saturated alpha-bromnaphthalene solution and pre-treating at room temperature; washing and fixing by Carnoy I stationary liquid for one night; washing and putting the roots into distilled water and carrying out low percolation; treating with cellulose-pectinase mixed enzyme liquid and washing; putting the roots into the distilled water and carrying out the low percolation; putting root tip meristems on a slide and dropwise adding the stationary liquid; crushing materials and coating, and removing large tissue residues; then adding the stationary liquid; dyeing and washing to remove a dyeing solution; marking a good metaphase of microscope inspection for later use; (2) carrying out microdissection on the chromosomes: putting the specimen slide onto an objective table of a laser microdissection system and setting a cutting path; mounting a centrifugal tube with a viscous tube cover on an automatic recycling device of the laser microdissection system; treating the viscous centrifugal tube for later use after the chromosomes are cut and recycled.

The invention discloses a ring cooling machine sealing device and a ring cooling machine. A specific embodiment of the ring cooling machine sealing device is used for sealing gaps between a trolley lower fence plate and an ash hopper bin wall in the ring cooling machine. The ring cooling machine sealing device comprises nozzles and high-pressure fans. The shape of the nozzles adapt to the gaps. The nozzles are connected to the ash hopper bin wall in a sealing mode. The distance between an air outlet and the trolley lower fence plate or between the air outlet and the surface of a sealing part connected to the trolley lower fence plate is within 15 mm to 25 mm and sealed through air curtains sprayed out by the nozzles. The air outlet direction is toward the side, with the larger air pressure, of the two sides of the gap, and the included angle between the air outlet direction and the horizontal direction is smaller than 40 degrees. The high-pressure fans communicate with the nozzles and provide high-pressure air sources for the nozzles. According to the embodiment of the ring cooling machine sealing device, mechanical contact does not exist during gap sealing, so that mechanical abrasion does not exist, and clearing and replacing are not often needed.

The invention discloses a gear ring-free planetary magnetic gear speed changing system. The gear ring-free planetary magnetic gear speed changing system comprises a gear ring-free planetary gear portion, a magnetic gear portion and a speed changing portion. The gear ring-free planetary gear portion comprises an input end planet carrier, an output end planet carrier, four groups of solar magnetic gears and planetary magnetic gears, and then gear ring-free planetary gear transmission can be achieved; the magnetic gear portion is made of a permanent magnet, magnetic poles are evenly distributed,and magnetic gear transmission is achieved through the opposites attract action; and the speed changing system comprises pushing rods, synchronizers, an input shaft and the solar magnetic gears, therefore, the purpose that the pushing rods control work of the synchronizers can be achieved, and the input shaft is connected with the four solar gears to generate different transmission ratio changes.The novel speed changing system has the advantages that overload protection is achieved, cleanliness and environmental friendliness are achieved, the machining requirement is low, the transmission ratio is large, the speed changing method is simple, the speed changing range is wide, and the usage occasion is wide.

A brake lamp control unit comprises a body and a magnet ring; the magnet ring is used for sleeving an inner piston of a brake pump. The body comprises a base, a circuit board and a Hall sensor; the circuit board is integrated to a control circuit; the control circuit is used for controlling on or off of a brake lamp; the Hall sensor is integrated to the circuit board and electrically connected with the control circuit; the body is installed to an outer wall of the brake pump in a plane where the magnet ring locates when the Hall sensor deviates from an initial position of the inner piston. When braking starts and a brake pedal drives the inner piston to move so that the magnet ring arrives or exceeds the Hall sensor, the Hall sensor outputs a first level signal, and the control circuit controls on of the brake lamp; when braking stops and the inner piston drives the magnet ring to pass by the Hall sensor and return to the initial position, the Hall sensor outputs a second level signal, and the control circuit controls off of the brake lamp. The brake lamp control unit is capable of accurately judging a braking action, the failure caused by poor contact is avoided, and the service life is longer.

The invention discloses a sight-stabilizing active magnetic suspension rotary table with 10 degrees of freedom. Driving mechanisms (10 and 11) are symmetrically mounted on the outer circular surface of a base (4). A plurality of radial and axial magnetic bearing integrated rotor assemblies (2) with the same structure are arranged on the circumference of the disc body (3), four radial and axial magnetic bearing integrated stator assemblies (6, 7, 8 and 9) are symmetrically distributed on the outer circumference of the magnetic suspension rotating platform (1), and a single-shaft turntable driving mechanism (5) is arranged in the center of the magnetic suspension rotating platform (1). Under the power-on condition, the radial and axial magnetic bearing integrated stator assemblies (6, 7, 8 and 9) are powered on to suspend the radial and axial magnetic bearing integrated rotor assembly (2), and on one hand, the radial and axial magnetic bearing integrated rotor assembly (2) is driven by the single-shaft turntable driving mechanism (5) to rotate; and on the other hand, the radial and axial magnetic bearing integrated rotor assembly (2) is driven by the driving mechanisms (10, 11) to realize complete suspension motion in clockwise, anticlockwise and vertical directions. An active vibration suppression function of the magnetic suspension bearing is adopted, mechanical isolation is achieved for micro-vibration of the sight-stabilizing active magnetic suspension rotary table, and the purpose of ultra-stability and ultra-quietness is achieved.

The invention discloses a gas turbine generator set which comprises a gas turbine, a power generation unit and a transmission mechanism connected with the gas turbine and the power generation unit. Multiple high-speed direct-driven generators are connected with a large-scale gas turbine in a planet manner by utilizing magnetic gears, so that the problem that the high-speed direct-driven generatorscannot realize high power is solved, and the requirements of the gas turbine on the high-power high-speed direct-driven generators are met. The gas turbine generator set disclosed by the invention isingenious in design concept, simple in structure, easy to realize and low in cost. According to the gas turbine, the high-speed direct-driven generators are used, and the volume and weight are decreased. Moreover, the magnetic gears are used, so that mechanical damage is reduced, and the fuel utilization rate is improved.

The invention discloses a device for extracting helium from natural gas. The device comprises a frame, a combustion module, an alkali liquor spraying module, a molecular sieve drying module, a filtering module, a heat exchange module, a refrigeration separation module and a magnetic suspension high-speed centrifugal separation module, wherein the combustion module, the alkali liquor spraying module, the molecular sieve drying module and the filtering module are sequentially arranged from bottom to top; the combustion module is connected with the alkali liquor spraying module; the alkali liquorspraying module is connected with the molecular sieve drying module; the molecular sieve drying module is connected with the filtering module; the filtering module is connected with the heat exchangemodule; the heat exchange module is connected with the refrigeration separation module; and the refrigeration separation module is connected with the magnetic suspension high-speed centrifugal separation module. According to the method, only helium and a small amount of hydrogen are left in the helium-containing natural gas tail gas through the steps of combustion, spraying, drying, filtering, pre-cooling and condensation separation, and then the helium and the small amount of hydrogen are introduced into the magnetic suspension high-speed centrifugal separation device to be effectively separated, so high energy consumption of a traditional cryogenic method is avoided, and helium extraction cost is greatly reduced.

The invention relates to the field of optical manufacturing technology, in particular to a continuous zoom lens with a linear motor and a self-locking function, including a moving lens, a scale, a reading head, a control circuit, a slider, a slide rail, a linear motor and a self-locking lens. Lock structure, the linear motor includes a stator and a mover, the stator includes a first magnet fixing plate and a second magnet fixing plate, the first magnet fixing plate and the second magnet fixing are provided with a magnet array, the first magnet fixing plate and the second magnet fixing There is a gap between the plates, one side of the stator is provided with an opening, and one side of the mover protrudes from the opening; the self-locking structure includes a locking motor, a rotating shaft, a magnet and a locking block, and the two sides of the locking block are arranged in parallel There is a magnetic guide sheet, and the rotating shaft is provided with a magnet. The invention adopts a scale and a reading head, reads the position information of the scale, and then obtains the position information of the moving lens, and the control circuit controls the running state of the linear motor according to the position information, thereby realizing closed-loop control of the up and down movement of the moving lens.

The invention discloses a planetary magnetic gear speed change system without a ring gear, which comprises a planetary gear part without a ring gear, a magnetic gear part and a speed change part. The gearless planetary gear part includes the planetary carrier at the input end, the planetary carrier at the output end, four sets of sun magnetic gears and planetary magnetic gears, which can realize planetary gear transmission without ring gears; the magnetic gear part is made of permanent magnets and the magnetic poles are evenly distributed , the magnetic gear transmission is realized through the attraction of opposite sexes; the transmission system includes a lever, a synchronizer, an input shaft and a sun magnetic gear, which can realize the work of the lever to control the synchronizer, so that the input shaft is connected or connected to the four sun gears to generate Variations for different gear ratios. This is a new type of speed change system, which has the advantages of overload protection, clean and environmental protection, low processing requirements, large transmission ratio, simple speed change method, large speed change range, and wide application occasions.