753 results about "Magnetic isolation" patented technology

The invention provides a permanent magnet motor and a variable-frequency scroll compressor, and relates to the technical field of scroll compressor design and manufacturing, and the permanent magnet motor comprises a stator iron core and a rotor iron core; the stator iron core comprises stator slots which are uniformly distributed along the circumference, copper windings are embedded in the slots, stator yokes which are uniformly distributed are arranged outside the bottom of each slot, each stator yoke is provided with an arc-shaped long slot, stator teeth are arranged between every two adjacent stator slots, and the tops of the stator teeth are sunken to form through-flow slots; the rotor core is internally provided with magnetic steel grooves which are uniformly distributed, two same first magnetic isolation grooves are arranged between two adjacent magnetic steel grooves, magnetic steel is arranged in the magnetic steel grooves, and the top of each magnetic steel is provided with two second magnetic isolation grooves which are symmetrically distributed. The outer side radius Rs1 of the stator core, the inner side radius Rs2 of the stator core and the axial length Lis of the stator core meet the following conditions: 1.282 < = Lis / (Rs1-Rs2) < = 2.778, and 34 < = Rs1-Rs2 < = 39 mm. The power density of the motor can be increased, the cost is reduced, the efficiency is improved, and the harmonic content is reduced so as to suppress torque ripple.

The invention provides a permanent magnet motor based on permanent magnet included angle optimization and a cogging torque suppression method thereof.The permanent magnet motor comprises a stator iron core, an armature winding, rotor iron cores and permanent magnets, and each pole of rotor iron core is provided with two sets of first V-shaped permanent magnet grooves and second V-shaped permanent magnet grooves which are symmetrical about the center line of the rotor iron core and are different in size; the permanent magnets are arranged in the first V-shaped permanent magnet grooves and the second V-shaped permanent magnet grooves respectively, the permanent magnets in the first V-shaped permanent magnet grooves and the second V-shaped permanent magnet grooves are arranged in a V-V shape, the included angle between the permanent magnets in the first V-shaped permanent magnet grooves is alpha, the included angle between the permanent magnets in the second V-shaped permanent magnet grooves is beta, and the permanent magnets in the first V-shaped permanent magnet grooves and the permanent magnets in the second V-shaped permanent magnet grooves are separated by the aid of an NSGA-II algorithm under the condition that the distance of the magnetic isolation bridge is unchanged. By adjusting the angle between the permanent magnets in the first V-shaped permanent magnet grooves and the second V-shaped permanent magnet grooves, the best matching combination of the small permanent magnet included angle alpha and the large permanent magnet included angle beta is optimized, and the arc-shaped auxiliary grooves are formed in the surface of the rotor iron core, so that the cogging torque of the permanent magnet motor is optimized.

The utility model provides an insulated gate bipolar transistor driving circuit with adjustable positive and negative voltages, comprising a magnetic isolation module, the input end of which is connected with a driving signal and outputs an isolation driving signal; the input end of the first voltage regulating module is connected with the first positive voltage and outputs a second positive voltage within a first preset range; the input end of the second voltage regulating module is connected with the first negative voltage and outputs a second negative voltage within a second preset range; the push-pull output module is connected between the second positive voltage and the second negative voltage, the control end of the push-pull output module is connected with an isolation driving signal, and the output end of the push-pull output module is connected with the gate pole of the to-be-tested insulated gate bipolar transistor through a gate resistor; and the protection module is controllably connected between the output end of the push-pull output module and the second voltage regulation module under the action of the control signal. The driving circuit has the beneficial effects that the positive and negative voltage output capability can be flexibly adjusted according to debugging requirements, the working condition requirements of different clients are met, and the flexibility and adaptability of the driving circuit are improved.

The invention belongs to the technical field of machine vision positioning and guiding, and discloses a nanocrystalline magnetism isolating sheet vision guiding laser deburring device and application thereof, and the nanocrystalline magnetism isolating sheet vision guiding laser deburring device comprises an image acquisition module, an image preprocessing module, a central control module, a laser module, a positioning module, a collection module, a data analysis module and a display module; according to the visual guidance technology, an advanced visual recognition system is introduced, the burr position is accurately positioned by monitoring the surface state of a workpiece in real time, and therefore the more intelligent laser deburring process is achieved. And laser parameter optimization: parameters such as wavelength, power and pulse frequency of laser are optimized according to different materials and burr types, so that the optimal deburring effect is achieved, and meanwhile, the completeness of the workpiece is ensured. And in the laser deburring process, environment-friendly materials and technologies are adopted, the influence on the environment is reduced, and the safety in the operation process is enhanced.

The invention belongs to the technical field of permanent magnetization remanufacturing, and particularly relates to a permanent magnetization regeneration method for a waste motor of copper alloy wire processing equipment, and the method comprises the steps: disassembling a waste asynchronous motor, and reserving a case, a stator, a rotor core and a rotating shaft which are not damaged; the specifications of the air injection channels are determined according to the diameter of the rotating shaft, more than two air injection channels are arranged on the rotating shaft at equal-angle intervals, and then the rotating shaft is installed in the machine shell; the rotor core is split to obtain steel sheets, and permanent magnet grooves, magnetic isolation air grooves and air injection channel grooves are formed in the steel sheets; the permanent magnets are assembled in the permanent magnet grooves, then the steel sheets are laminated according to a first rule to obtain a rotor, and then the rotor is assembled to the rotating shaft; a rear end cover of the machine shell is removed, a heat dissipation machine cover is manufactured according to the diameter of the rear end cover, a bearing groove and an air outlet hole are formed in the heat dissipation machine cover, and then the heat dissipation machine cover is assembled to the machine shell; and a frequency converter is additionally arranged on the shell. The remanufactured permanent magnet synchronous motor manufactured by the method has better sealing performance and heat dissipation performance.

The present invention discloses an electronic expansion valve with a buffering effect, which includes a stator assembly and a valve seat assembly. The valve seat assembly is installed at the lower part of the stator assembly. The valve seat assembly includes an end cover assembly, a magnetic isolation tube, a valve needle assembly and a valve seat assembly. A lead screw assembly is arranged inside the magnetic isolation tube. The valve needle assembly includes a valve needle and a valve needle spring arranged in the inner hole at the lower end of the valve needle. The lower end of the valve needle is inserted with a valve needle head. A balance flow channel is opened in the middle of the valve needle head. A bushing is sleeved on the outer side of the upper part of the valve needle head. One end of the bushing abuts against the valve needle spring. A valve needle sleeve is arranged at the lower end of the bushing. A valve needle internal leakage O-ring is installed between the inner side of the valve needle sleeve and the valve needle head. The lead screw in the lead screw assembly axially inserts into the central threaded through hole of the valve needle. The present invention has a balance pressure function, a long service life, and a buffering effect when closing the valve, preventing the problem of thread jamming and unable to open the valve.

The present invention provides a rotor punching, a rotor core, a rotor, a motor, and a vehicle. The rotor punching is provided with a plurality of mounting slots for mounting permanent magnets. A pole arc region is defined between the portion of any mounting slot adapted for the permanent magnet and the outer periphery of the rotor punching. A magnetic isolation bridge is provided on both sides of any pole arc region along the circumferential direction of the rotor punching. A plurality of through holes are provided in any pole arc region, and the plurality of through holes are distributed at both ends of the pole arc region adjacent to the magnetic isolation bridge. The rotor punching provided by the present invention optimizes the rotor magnetic field distribution by providing through holes at the ends of the magnetic isolation bridges on both sides of the pole arc region, effectively weakening the quadrature-axis armature reaction, significantly improving the motor torque pulsation, and also enhancing the electromagnetic torque of the motor to a certain extent, thereby improving the motor's operating performance.

The utility model discloses a normally open solenoid valve for an automobile multi-cavity air spring, which comprises a shell, a framework arranged in the shell, an enameled wire wound on the outer side of the framework, a magnetism isolating tube arranged in an inner hole in the middle of the framework, a movable iron core arranged in the magnetism isolating tube, and a cushion block assembly arranged between the magnetism isolating tube and the end part of the movable iron core, an electrical interface is installed at the end of the shell, a valve seat is installed at the second axial end of the shell, a base is installed between the valve seat and the framework, an ejector rod piece capable of moving axially is arranged at the position, corresponding to the valve port, between the base and the valve seat, the first end of the ejector rod piece penetrates through the base to abut against the movable iron core, and a connecting socket is arranged at the end of the framework. The connecting socket is connected with a PIN needle in the electrical interface, a limiting claw is arranged at the side end of the PIN needle, and after the limiting claw is bent, the enameled wire is pressed and fixed on the PIN needle and is subjected to spot welding. The electromagnetic valve can solve the problems that an electric power connection structure of an existing electromagnetic valve is complex, and power connection is not reliable.

The invention relates to the technical field of new energy grid connection, in particular to a new energy grid-connected inverter system based on a double-stator synchronous motor interface, which comprises a three-phase inverter and a double-stator synchronous motor, the double-stator synchronous motor comprises a first stator, a rotor and a second stator. Planar air gaps exist between the rotor and the first stator and between the rotor and the second stator. The rotor comprises a first rotor and a second rotor which are rigidly connected, the first rotor is axially adjacent to the first stator, the second rotor is axially adjacent to the second stator, and a magnetic isolation ring is arranged between the first rotor and the second rotor; each of the first stator and the second stator comprises a stator core and an armature winding, the first rotor comprises a first rotor core, an excitation winding and a starting winding, and the second rotor comprises a second rotor core and a permanent magnet. According to the invention, the double-stator configuration can realize voltage transformation and frequency conversion functions, and can solve the problems of reduced power grid inertia, insufficient short-circuit capacity, aggravated broadband oscillation risk and the like caused by grid connection of large-scale new energy through power electronic equipment.

The pressure release valve comprises a shell and a fixing sleeve arranged on the shell, an installation cavity is formed in the shell, an electromagnetic coil assembly is arranged in the installation cavity, the magnetic isolation sleeve is inserted in the installation cavity, the magnetic isolation sleeve is connected between the shell and the fixing sleeve in an abutting mode and isolates the installation cavity, and the electromagnetic coil assembly is arranged in the magnetic isolation sleeve. A movable valve element is arranged on the magnetism isolating sleeve in a sliding mode, and the end of the movable valve element is connected with a sealing piece.

The invention discloses a multi-mode energy-feedback type suspension actuator and a control method thereof, relates to the field of suspension actuators, and particularly aims to solve the problem that an oil-gas energy-feedback type suspension actuator combining an oil-gas spring, a linear motor and a piezoelectric material does not exist in the prior art. The multi-mode energy feedback type suspension actuator comprises an actuator shell and a piston rod, the piston rod is movably inserted in the actuator shell, the multi-mode energy feedback type suspension actuator further comprises a partition plate and a magnetism isolating plate which are arranged in the actuator shell, and the piston rod movably penetrates through the partition plate and the magnetism isolating plate; in the actuator shell, oil is poured into the position above the partition plate, a hydro-pneumatic spring module is arranged, a piezoelectric module is arranged between the partition plate and the magnetism isolating plate, and a linear motor module is arranged below the magnetism isolating plate. Several structures are highly integrated, vibration energy is recycled while vehicle performance adjustment is achieved, vehicle running smoothness and handling stability are improved, and self-energy-supply of a vehicle suspension is basically achieved.

The invention discloses a radial two-degree-of-freedom hybrid magnetic bearing with external permanent magnets. The radial two-degree-of-freedom hybrid magnetic bearing comprises a stator and a rotor. The rotor comprises a rotor iron core, a rotating shaft, two rotor U-shaped grooves, two rotor magnetic isolation aluminum rings and two rotor permanent magnet rings, the stator comprises a stator iron core, a coil, two stator U-shaped grooves, two stator magnetic isolation aluminum rings and two stator permanent magnet rings, and the polarities of the stator and the rotor permanent magnet rings which are opposite up and down are opposite; the permanent magnet rings are respectively embedded into the corresponding U-shaped grooves and are arranged on two sides of the stator core and the rotor core through the magnetic isolation aluminum rings, eight magnetic poles are uniformly distributed in the stator core, eight coils are wound on the magnetic poles, the coils on two poles in the + X,-X, + Y and-Y directions are respectively and reversely connected in series to form suspension windings in the + X,-X, + Y and-Y directions, and then the suspension windings are driven by the four switch power amplifiers. The radial two-degree-of-freedom hybrid magnetic bearing provided by the invention has the advantages of no coupling of permanent magnetic flux and suspension magnetic flux, high suspension precision, low power consumption, easiness in processing and assembling and high suspension force density.

The invention discloses a double-stator permanent magnet motor structure, and relates to the technical field of motors. One end of the inner stator shaft is fixed on the motor rear end cover, the other end of the inner stator shaft is suspended, and the motor rear end cover is connected with the casing; the inner stator bracket is fixed on the inner stator shaft; the inner rotor iron core and the outer rotor iron core are respectively fixed on the inner ring and the outer ring of the magnetism isolating ring, and the two ends of the magnetism isolating ring are supported and fixed through the rotor front end cover and the rotor rear end cover; the double-row cylindrical roller bearing is radially arranged between the rotor rear end cover and the inner stator shaft; the cylindrical roller bearing is radially arranged between the rotor front end cover and the motor front end cover, and the motor front end cover is connected with the shell; the deep groove ball bearing is axially arranged between the rotor front end cover and the inner stator shaft; the outer stator iron core is pressed into the heated and expanded casing; and the inner stator iron core is thermally sleeved on the inner stator bracket. Through configuration and arrangement of the three bearings, oil injection and discharge positions are all located outside the motor, the working temperature of the bearings is effectively reduced, and the service life is prolonged.

The invention relates to the technical field of building construction, and discloses a house building foundation engineering construction device which comprises a multi-shaft pile driver body, a power integration box is installed on one side of the multi-shaft pile driver body in a limiting and sliding mode, and a plurality of stirring piles are rotatably installed at the output end of the power integration box; driving gears are fixedly mounted on the outer sides of the top ends of the stirring piles, the multiple driving gears are in meshing transmission, and mounting cavities formed in the inner side walls of the driving gears are further included. The connecting strength between the mixing pile and the driving gears is changed through coincidence or dislocation between the permanent magnet plates and the magnetism isolating plates, so that the probability that the mixing pile is damaged when the bottom end of the mixing pile encounters a hard obstacle is reduced, and the situation that a plurality of driving gears bear extra load and impact due to mutual meshing is avoided; the driving gear and the power system are protected, the service life of the multi-shaft pile driver body is prolonged, the influence of hard obstacles on the construction progress is reduced, and the construction progress and the engineering quality of the sealing wall are improved.

The invention discloses a composite voltage generation device and a cable insulation performance evaluation system and method, and relates to the technical field of high-voltage insulation testing. The composite voltage generating device comprises a synchronous controller, a direct current source, an impact source, an IGBT active protection unit and a magnetic isolation coupler, and by means of the excellent characteristics of the IGBT and the magnetic isolation coupler, the superposition time sequence accuracy of direct current and impact voltage is improved, and waveform distortion is reduced. The IGBT active protection unit comprises a first IGBT and a second IGBT, and direct-current voltage polarity switching can be realized through selective conduction of the IGBTs; the RC circuit is connected in parallel between the collector electrode of the first IGBT and the emitter electrode of the second IGBT, reverse current flowing back to the direct current source direction can be discharged through the RC circuit, the risk of energy flowing back is reduced, meanwhile, the magnetic isolation coupler can completely block direct current, and an impact source is protected against the influence of direct current voltage; according to the invention, the authenticity and reliability of cable insulation performance evaluation can be effectively improved.

The present invention provides a rotor and a motor having the same. Among them, the rotor includes: a rotor core having a mounting hole, multiple groups of mounting portions and a first magnetic isolation groove. The mounting hole is used for mounting a rotating shaft, and the multiple groups of mounting portions are arranged at intervals along the circumferential direction of the mounting hole; along the radial direction of the rotor core, the first magnetic isolation groove is located between the mounting hole and the multiple groups of mounting portions; a plurality of first permanent magnets; wherein, each group of mounting portions includes at least two mounting grooves arranged at intervals along the circumferential direction of the rotor core, each mounting groove extends along the radial direction of the rotor core, and at least one first permanent magnet is arranged in each mounting groove; in two adjacent groups of mounting portions, the first permanent magnet arranged in one mounting groove of one group of mounting portions and the first permanent magnet arranged in another mounting groove adjacent to this mounting groove in the other group of mounting portions form a magnetic pole. The present invention effectively solves the problem of low motor efficiency in the prior art.

A semi-direct drive permanent magnet synchronous motor for a pumping unit, the semi-direct drive permanent magnet synchronous motor comprising a housing, and a stator and a rotor arranged in the housing. The rotor comprises a rotor core, magnetic steel slots arranged on the rotor core, and magnetic steel arranged in the magnetic steel slots. A magnetic isolation bridge is arranged on the side of each magnetic steel slot close to an outer edge of the rotor core, and a hollow magnetic isolation part is arranged on the side of the magnetic steel slot close to the middle of the rotor core. A magnetic pole is arranged between each two adjacent magnetic steel slots, and the sides of the two pieces of magnetic steel located on two sides of the magnetic pole and facing the magnetic pole have a same polarity. Compared with the prior art, the present invention has the following advantages: each hollow magnetic isolation part is arranged on the side of the magnetic steel close to the middle of the rotor core, which effectively suppresses the flux leakage of the magnetic steel while achieving weight reduction of the rotor core and improving the energy conversion efficiency of the motor. The provision of a first reinforcing annular plate and a second reinforcing annular plate improves the mechanical strength of the rotor and compensates for the impairment to strength caused by the hollow magnetic isolation parts; moreover, the magnetic steel is lowered down to be covered therein, so that harm caused by the magnetic steel falling off is eliminated.

The invention discloses a double-frequency phase independent regulation and control metasurface unit and an application method. The metasurface unit comprises a dielectric substrate; the two sides of the dielectric substrate are covered with a first metal layer and a second metal layer respectively. Each of the first metal layer and the second metal layer comprises a metal patch main body and a phase regulation and control structure, the center of the metal patch main body is provided with a circular hollow, and the phase regulation and control structure is arranged in the circular hollow; the phase regulation and control structure of the first metal layer and the phase regulation and control structure of the second metal layer are in 180-degree rotational symmetry; the double-connecting-ring structure is an axisymmetric structure; an open circular split ring resonator is arranged in the double-connecting-ring structure, and an electromagnetic isolating ring group is arranged in the open circular split ring resonator; according to the invention, 360-degree independent phase control on electromagnetic waves at a low-frequency band and a high-frequency band is realized.

The invention relates to a rotor structure suitable for improving weak magnetic speed expansion capability of a disc type motor, a rotor core is embedded in a groove of a rotor support disc, composite magnetic poles are uniformly distributed and attached to the surface of the rotor core, a magnetic isolation support and the rotor support disc are fixed together, and the composite magnetic poles are embedded in mounting grooves of the magnetic isolation support. The composite magnetic poles are composed of permanent magnets, parallel magnetic poles and series magnetic poles, the series magnetic poles are attached to the surfaces of the permanent magnets in the axial direction to form series parts of the magnetic poles, the series parts of the parallel magnetic poles and the series parts of the magnetic poles are arranged in parallel in a one-to-one correspondence mode in the radial direction, and the series parts of the parallel magnetic poles and the series parts of the magnetic poles form parallel parts of the magnetic poles. Compared with a surface-mounted disc type motor, the direct-axis inductance of the motor is obviously improved; and compared with a disc type motor with parallel combined magnetic poles, the output power is higher in the same speed expansion range. When the motor is used for a disc type motor, the disc type motor has a wide flux-weakening speed regulation range, and the loading capacity of the motor at a low speed is improved.

The invention relates to a low-harmonic permanent magnet synchronous motor rotor punching sheet and a motor rotor, and relates to the technical field of permanent magnet synchronous motors. According to the scheme, the rotor punching sheet is provided with the first magnetic steel groove and the second magnetic steel groove which form a V shape and are symmetrical about the D axis of the motor rotor, and the opening of the V shape faces the outer circumferential wall of the rotor punching sheet body. According to the structure, the distribution of a motor rotor magnetic field is improved, the magnetic field is more uniform, the salient pole rate is higher, the weak magnetic speed expansion capability is stronger, the structural strength is better, the harmonic content is lower, and the sine property of the magnetic field can be improved. On the outer circumferential wall of the rotor punching sheet body, a first auxiliary groove is formed between the first magnetic isolation bridge and the second magnetic isolation bridge and close to the first magnetic isolation bridge, and a second auxiliary groove is formed between the second magnetic isolation bridge and the D shaft and close to the second magnetic isolation bridge. On the premise of ensuring the mechanical strength of the magnetic isolation bridge, the magnetic line direction is changed, the magnetic leakage is reduced, the air gap flux density waveform is improved, the harmonic content is reduced, and the torque ripple and electromagnetic noise are reduced.

The present invention discloses a stator core assembly, a stator, and a motor, wherein the stator core assembly includes a core component and a plurality of independent insulating frames, the core component includes a plurality of cores arranged in sequence, two adjacent cores are connected by a magnetic isolation bridge, and the insulating frames correspond to the cores one by one; wherein the core includes a connected yoke, a tooth portion, and a boot portion, the yoke and the boot portion are arranged at both ends of the tooth portion, the insulating frame is provided with a through-hole, and the tooth portion is installed in the through-hole. The plurality of cores of the core component are connected in sequence by magnetic isolation bridges, and the magnetic isolation bridges are used to reduce the amount of magnetic leakage, which is beneficial to improving the efficiency of electromagnetic energy conversion and improving the performance of the motor; moreover, the teeth of the core are installed in the through-hole of the insulating frame, and each independent insulating frame is fixed to the core component, so the structure is stable and reliable.

The invention provides a high-speed switch and precise control displacement electromagnetic valve which comprises a plunger tube assembly, a movable valve element, a first coil, a second coil, a controller and a displacement sensor, and the movable valve element is installed in the plunger tube assembly in a sliding mode; the first coil and the second coil are arranged at the two ends of the magnetism isolating pipe assembly in a sleeving mode correspondingly and used for generating electromagnetic force to drive the movable valve element to move in the magnetism isolating pipe assembly. The controller is electrically connected with the first coil and the second coil and used for controlling power-on and power-off of the first coil and the second coil and the magnitude of current. The displacement sensor is mounted at one end of the plunger tube assembly, electrically connected with the controller and used for detecting the position of the movable valve element and feeding back the position to the controller; one end of the movable valve element penetrates through the displacement sensor and is arranged outside the magnetism isolating pipe assembly. The high-speed switching and precise displacement control electromagnetic valve has the advantages of high-speed switching and precise displacement control.

The invention provides a multi-end alternating type permanent magnet one-way driving device and a control method, and belongs to the technical field of permanent magnet driving. The device comprises an end A and an end B which are respectively provided with a rotor, an intermittent stator, a magnetic isolation layer, an electromagnetic clutch and a one-way rotating mechanism. A magnetic flux path is selectively blocked or conducted through the magnetic isolation layer, and dynamic coupling and decoupling of the electromagnetic clutch are combined, so that the double-rotor alternating working mode is achieved. The control system corrects the rotor phase difference in real time through a phase compensator and a Hall sensor, and continuous power output is ensured. The permanent magnet driving device solves the problems that an existing permanent magnet driving device is low in magnetic energy conversion efficiency and discontinuous in motion and has dead points, has the advantages of being efficient, capable of saving energy, stable in output, capable of achieving modular expansion and the like, and is suitable for scenes of new energy automobiles, industrial transmission, grid-connected and off-grid power generation and the like.

The invention relates to a three-dimensional integrated complete machine system of a chip-scale atomic clock. The device comprises an energy supply battery, a crystal oscillator and a stacking base which are arranged on a PCB (Printed Circuit Board), an integrated stacking assembly and a stacking upper cover are sequentially arranged on a stacking base, the integrated stacking assembly is of a hollow structure, the stacking base, the integrated stacking assembly and the stacking upper cover are stacked to form a stacking base body structure with a cavity, and a chip-level atomic clock physical system is placed in the cavity of the stacking base body. A magnetic isolation material layer is arranged on the surface of an inner cavity of the stacking base body, and IC chips and protective shells are arranged on the four surfaces of the outer side of the stacking base body. Electrical three-dimensional transmission is carried out in the stacked substrate through the through hole structure filled with the copper columns and the rewiring layer, and mutual communication among the PCB, the physical system and the IC chip is achieved. And three-dimensional integration of the atomic clock complete machine system structure is realized.

The present invention discloses a large-torque and low-speed compliant transmission device based on magnetorheological fluid, which comprises a fixed base, a housing, a rotating shaft, an upper swing frame and a lower swing frame; the housing is connected to the upper swing frame and moves synchronously with the upper swing frame. An upper magnetic isolation ring is fixed inside the housing, and a main excitation coil is evenly wound in the annular space inside the upper magnetic isolation ring; a driven wheel is fixedly sleeved on the upper part of the rotating shaft, and two sealing rings are rotatably connected inside the housing, and an upper sealing cavity is formed between the two sealing rings, the inner ring of the upper magnetic isolation ring and the outer ring of the driven wheel; a lower magnetic isolation ring is fixed at the middle position of the lower swing frame, and a secondary excitation coil is evenly wound in the annular space inside the lower magnetic isolation ring; two sealing plates are welded and fixed at the lower end of the rotating shaft at intervals up and down, and a lower sealing cavity is formed between the two sealing plates, the inner ring of the lower magnetic isolation ring and the outer wall of the rotating shaft; the upper sealing cavity and the lower sealing cavity are respectively filled with magnetorheological fluid. The present invention can achieve the compliant start and stepless speed regulation functions of the transmission system.

The invention provides a rotor assembly and a servo motor. The rotor assembly comprises a rotor iron core, permanent magnets and an irradiation light source, the multiple permanent magnets are arranged at intervals in the circumferential direction of the rotor iron core, the rotor iron core is provided with a magnetic isolation gap and an installation groove which are communicated with each other, the installation groove penetrates through at least one end of the rotor iron core in the axial direction, and the magnetic isolation gap is formed between every two adjacent permanent magnets in the radial direction; the installation groove is internally provided with a photosensitive telescopic piece, one end, close to the central axis of the rotor core, of the photosensitive telescopic piece is fixedly connected with the groove wall of the installation groove, and one end, far away from the central axis of the rotor core, of the photosensitive telescopic piece is fixedly connected with the magnetic conduction slip sheet. The irradiation light source is used for irradiating the photosensitive telescopic piece to adjust the telescopic length of the photosensitive telescopic piece. According to the rotor assembly and the servo motor, accurate field weakening control can be achieved, and the rotating speed range of the servo motor is widened.

The utility model provides an automatic collection structure and recovery equipment, the automatic collection structure is used for collecting magnetic identification sheets adsorbed on the surface of an object to be detected, and the automatic collection structure comprises a movable seat, and a guide plate, a guide seat and a driving device which are respectively arranged on the same side surface of the movable seat; the guide plate forms a collection channel of the magnetic recognition sheets, the width of the collection channel is gradually reduced from the inlet to the outlet, and the outlet of the collection channel is connected with the inlet of the guide seat; a collecting position is arranged at the end, away from the guide plate, of the guide seat, a driving device and a collecting box are arranged on the two opposite sides of the collecting position respectively, and the driving device is used for pushing the magnetic recognition pieces located on the collecting position into the collecting box so that the magnetic recognition pieces can be separated from the surface of the to-be-detected object, and therefore the magnetic recognition pieces are collected in the collecting box; and the movable seat, the guide plate, the guide seat and the driving end of the driving device are all made of magnetic isolation materials. The automatic collection structure and the recovery equipment provided by the utility model are simple in structure, low in cost and capable of efficiently recovering the magnetic identification sheets.

The invention discloses a subminiature three-coaxial differential self-locking high-temperature-resistant assembly and a connector, and relates to the technical field of radio frequency connectors, the subminiature three-coaxial differential self-locking high-temperature-resistant assembly comprises a shell, an outer shield is arranged in the shell, an outer insulator is arranged on the inner side of the outer shield, and an inner shield is arranged on the inner side of the outer insulator. According to the subminiature three-coaxial differential self-locking high-temperature-resistant assembly and the connector, efficient electromagnetic isolation is formed by the double shielding layers composed of the outer shielding layer and the inner shielding layer and the inner conductor, radio frequency leakage and signal crosstalk can be remarkably inhibited through cooperative use of the structures, the problem that a traditional double-coaxial structure is insufficient in shielding is solved, and meanwhile, the connector is high in reliability. The inner shielding layer and the outer shielding layer of the twisted pair are respectively welded with the inner shielding layer and the outer shielding layer, the continuity of the shielding effect is ensured, the connecting seat is made by sintering glass powder and is provided with a conductive silver powder sealing ring, the stability at high temperature is ensured, good grounding continuity is also provided, and the overall electromagnetic compatibility performance is further enhanced.

The utility model relates to a motor rotor structure and a driving motor, and relates to the technical field of driving devices. A motor rotor structure comprises a rotor body and a plurality of first magnets, the rotor body is provided with a plurality of first fixing grooves in the radial direction, the first fixing grooves are evenly arranged at intervals in the circumferential direction of the rotor body, the first magnets are clamped in the fixing grooves in a one-to-one correspondence mode, and a first magnetic isolation bridge is arranged between every two adjacent first fixing grooves. The first magnetic isolation bridge is located at one end of the first fixing groove close to the central axis of the rotor body. According to the motor rotor structure, the first magnets are radially arranged along the rotor body section, the utilization rate of the first magnets is improved, the magnet consumption is reduced, and the cost is reduced. Meanwhile, one end, close to the center of the rotor body, of each first fixing groove is provided with a first magnetic isolation bridge, the space is fully utilized to optimize the structure of the rotor body, the utilization rate of the permanent magnets is ensured, and the performance and efficiency of the motor are further improved.

The utility model provides a spring needle magnetism isolating connecting device and a glove knitting machine, and belongs to the technical field of knitting machinery. The spring needle magnetism isolating connecting device comprises a spring needle body, a magnetism isolating piece and an attraction piece. One end of the magnetic isolation piece is fixedly connected to the spring needle body, the other end of the magnetic isolation piece is fixedly connected to the attraction piece, the attraction piece can be magnetically attracted to the magnetic bar of the needle selector, and therefore attraction of the spring needle body is completed, the magnetic isolation piece isolates magnetic force emitted by the magnetic bar of the needle selector from the spring needle, and the attraction piece is demagnetized when the spring needle body needs to be loosened. The residual magnetic force of the attraction piece is smaller than the first preset value, the attraction piece cannot affect the spring needle body, the spring needle body can be quickly loosened, the structure is simple, and operation is easy and convenient.