48results about How to "Eliminate friction loss" patented technology

The invention discloses a magnetic suspension switch magnetic resistance flywheel motor and a control method. The magnetic suspension switch magnetic resistance flywheel motor comprises an inner stator, a rotor and an outer stator. The inner stator (6), the rotor (4) and the outer stator (1) are successively nested in a concentric mode, 12 torque poles (2) are arranged on the inner wall of the outer stator (1) at equal intervals, and the torque poles are wound by main windings (3); eight rotor salient poles (5) are arranged on the outer wall of the rotor (4) at equal intervals; and four suspension poles (7) are arranged on the outer wall of the inner stator (6) at equal intervals, and the suspension poles (7) are wound by suspension force windings (8). According to the invention, the problem of incapability of effectively generating suspension forces when a stator and a rotor are not aligned by use of a conventional magnetic suspension switch magnetic resistance motor is overcome, the radial force and the torque decoupling effect are good, the radial load capability is improved, the suspension force windings are individually controlled simply according to a needed radial suspension force, each main winding on the outer stator is also controlled simply according to needed electromagnetic torque, the control is easy, and a control algorithm is simpler and is more easily realized.

An artificial muscle driven bionic moving mechanism is composed of pulse power wires, power supply, controller connected between said pulse power wine and power supply, skeleton consisting of one or more vertebrae with pores, artificial muscles made of memory alloy or electrosensitive polymer and connected between two pores on vertebrae, and deformation inductor.

The invention discloses a wind generator of a horizontal shaft semi-magnetic suspension structure. A generator permanent magnet rotor body directly generates a magnetic suspension force, a wind thrust is automatically balanced, so that the friction loss generated in a bearing by the wind thrust is eliminated, the efficiency of the generating set is improved, more energy can be obtained from wind, the wearing and noises of the bearing are simultaneously reduced, the maintenance cost is lowered, and the service lifetime of the generating set is prolonged. Two kinds of external forces, the gravity and the wind thrust, are usually applied to the wind generator, both the two kinds of forces generate friction losses, the semi-magnetic suspension structure can be used for eliminating the wind thrust friction loss of the horizontal shaft generating set or eliminating the gravity friction loss of a vertical shaft generating set. The other force still needs to be restrained and positioned by an improved bearing, the magnetic field of the generator is enabled to have a magnetic suspension function, and the magnetic suspension reconstruction cost is substantially lowered, so that wearing can be reduced by half, the excellent mechanical property is realized, the high cost performance is achieved, the performance is excellent, and the practical value is high.

The invention discloses a double-stator magnetic suspension switch reluctance starting / power generation machine which sequentially comprises an inner stator, a rotor and an outer stator from inside to outside, the inner stator, wherein the rotor and the outer stator are in the salient pole type and are nested in a concentric mode; M main winding poles are arranged on the outer stator at equal intervals, and each main winding pole is provided with a main winding which achieves starting and power generation functions; N rotor salient poles are arranged on the rotor at equal intervals; O suspension poles are arranged in the inner stator at equal intervals, and each suspension pole is provided with a suspension winding which achieves a rotor suspension function; magnetic flow paths of the main windings are independent of magnetic flow paths of the suspension windings, the coupling problem between the starting / power generation function and the suspension function is solved, aligning areas of the suspension poles and the rotor are equal to pole widths of the suspension poles, and radial suspension performance is improved. The machine integrates the starting and power generation functions and the rotor self-suspension function, the structure of an engine can be more compact, and the engine is convenient to maintain and control.

The invention brings forward a control method of a magnetic suspension system in a magnetic suspension centrifuge and a system thereof. Difference between a measured air gap and a standard air gap is calculated by the equation of Delta delta=delta1-delta0, and current output power tube groups are gradually controlled according to the calculation result so as to make the Delta delta to be equal to zero. The invention also provides a power control system of a magnetic suspension centrifuge. The power control system comprises a magnetic suspension system and a motor control device. The magnetic suspension system is composed of a displacement sensor, a computer controller and a solenoid, etc. The computer controller is composed of a motherboard, an input module, an output module and a power supply. By the technical scheme of the invention, the magnetic suspension centrifuge can operate steadily and stably, and defects caused by a speed reducer are eliminated. As sensor detection speed and computer processing speed are fast and reach only 1 / 100 second, stability of air gap distance can be maintained.

The invention provides a non-coaxial disc-type magnetic gear, which can transmit torque and mechanical energy to regulate the relative velocity of an inner rotor and an outer rotor. The non-coaxial disc-type magnetic gear comprises the inner rotor and outer rotor which are not coaxial, and a magnetism-adjusting structure, wherein both the inner rotor and the outer rotor adopt disc-type structures; permanent magnets are axially magnetized and are circumferentially stuck onto the surface of a rotor yoke; the magnetism-adjusting structure consists of magnetism-adjusting iron blocks for guiding magnetism; the magnetism-adjusting iron blocks are placed at intervals; all the magnetism-adjusting iron blocks are fixed together to form the disc-type structures, are placed on one side of each of an inner rotor disc and an outer rotor disc and form certain air gaps with the inner rotor disc and the outer rotor disc. The whole magnetism-adjusting structure is simple in structure and convenient to mount; the non-coaxial disc-type magnetic gear improves the torque density and the energy transfer efficiency by utilizing the magnetic field modulating principle; the non-coaxial disc-type magnetic gear has the advantages of an ordinary magnetic gear of no contact, low noise, overload self-protection and the like, so that the non-coaxial disc-type magnetic gear is especially suitable for non-coaxial transmission, isolated transmission and other occasions.

A multi-port energy conversion device comprises a low-speed-side rotor composed of a low-speed-side rotor yoke (1) and a low-speed-side permanent magnet (2) on the inner side of the low-speed-side rotor yoke (1), a high-speed-side rotor composed of a high-speed-side rotor yoke (6) and a high-speed-side permanent magnet (5) on the inner side of the high-speed-side rotor yoke (6) and a magnetism regulating mechanism composed of an armature winding (4) and magnetism regulating iron blocks (3) located on the two sides of the armature winding (4). The low-speed-side rotor and the high-speed-side rotor are located on the two sides of the magnetism regulating mechanism respectively, air gaps are reserved between the low-speed-side rotor and the magnetism regulating mechanism and between the high-speed-side rotor and the magnetism regulating mechanism, and the low-speed-side rotor, the high-speed-side rotor and the magnetism regulating mechanism are coaxial. The low-speed-side rotor and the high-speed-side rotor are connected with a low-speed rotating shaft and a high-speed rotating shaft respectively, and the rotating shafts can freely rotate. The conversion device is provided with two mechanical ports and an electric port, and multi-directional multi-output conversion of mechanical energy and electric energy is achieved.

The invention discloses a motor, a motor driving system, an electric push rod and an electric speed reducer, relates to the technical field of motor equipment, and aims to solve the problems of axialplay, noise, abrasion and low efficiency of a motor-driven worm and gear structure. The main points of the technical scheme are that the motor comprises a shell which is provided with a front end shaft hole, wherein a bearing is arranged in the front end shaft hole; a rotor assembly which comprises a rotating shaft and a coil arranged around the telescopic rotating shaft, wherein one end of the rotating shaft is rotationally connected to the front end shaft hole through a bearing; a stator assembly which comprises a permanent magnet surrounding the rotating shaft assembly; and an anti-shiftingassembly which is used for limiting bidirectional axial movement of the rotating shaft. The invention provides the motor which is stable, low in noise, high in efficiency and suitable for a worm andgear structure and a motor driving structure.

The invention relates to a magnetic suspension bearing vertical shaft double-wind-power power generating device. A lightning arrester module, water-drop-shaped strip-shaped bent piece modules, top mixing magnetic suspension bearing modules, draught fan blade modules, double-wind-power power generator modules, radial magnetic suspension bearing modules and bottom magnetic suspension vertical bearing modules; the top mixing magnetic suspension bearing modules are fixed to the bottoms of the upper ends of the water-drop-shaped strip-shaped bent piece modules; the draught fan blade modules are installed on the inner sides of the water-drop-shaped strip-shaped bent piece modules; the double-wind-power power generator modules are installed on the draught fan blade modules; the radial magnetic suspension bearing modules are fixedly installed on bottom supporting portions of the water-drop-shaped strip-shaped bent piece modules; and the bottom magnetic suspension vertical bearing modules and the bottoms of the water-drop-shaped strip-shaped bent piece modules are fixed together. The magnetic suspension bearing vertical shaft double-wind-power power generating device adopts the upper and lower magnetic suspension bearing structure, so that the whole power generator device is completely suspended, the starting air speed is small, the output power is increased, and the device is simple inmechanical structure and greatly improves the utilizing rate of wind energy.

The invention discloses a radial flux doubly salient permanent magnet motor integrated with a radial magnetic bearing, and the motor comprises a rotating assembly which comprises a rotating part and astator body disposed at the periphery of the rotating part; a suspension assembly which is arranged on the outer side of the rotating shaft of the rotating part; an permanent magnet which is positioned between the suspension assembly and the stator body; a magnetic bearing stator magnet yoke of the suspension assembly is arranged on one side of the permanent magnet; a magnetic bearing stator salient pole of the suspension assembly is arranged on the inner wall of the magnetic bearing stator magnet yoke. According to the invention, a bias magnetic field is generated by a permanent magnet; an electromagnet is adopted to provide a control magnetic field, the control magnetic field and an excitation magnetic field interact with each other to generate controllable radial suspension force, theradial suspension force is utilized to enable the rotating shaft to be in a non-contact state, friction loss caused by mechanical contact when the rotating shaft rotates is eliminated, and stable suspension in two radial freedom degrees is achieved.

The invention discloses a few friction pair seawater desalination high-pressure pump and energy recovery integrated unit. The integrated unit comprises a seawater hydraulic pump and a seawater hydraulic motor, wherein two sliding shoe pairs in a traditional swash plate type plunger pump are reduced. A structural form that a pump and a motor are arranged on two sides of a main shaft turntable is adopted, a pump end flow distribution swash plate is communicated with a low-pressure seawater inlet and a high-pressure seawater outlet, and a motor end flow distribution swash plate is communicated with a low-pressure strong brine outlet and a high-pressure strong brine inlet. During working, the motor drives the hydraulic pump to suck raw seawater and pressurize, the generated high-pressure seawater is filtered by a reverse osmosis film into the high-pressure strong brine to enter the hydraulic motor, and the high-pressure strong brine is discharged through a low-pressure strong brine outletafter energy recovery is completed. The integrated unit is advantaged in that an energy recovery device overcomes defects that an energy recovery device is low in integration level, large in number offriction pairs, capable of mixing salt / seawater and the like, and the integrated unit has obvious technical advantages of high energy recovery efficiency, no mixing, long service life and the like.

The invention discloses a novel magnetic gear for a two-way air-gap field. The novel magnetic gear for the two-way air-gap field comprises a driving wheel, a driven wheel and a magnetic field regulating grid, wherein the driving wheel and the driven wheel are coaxially mounted in a stator housing. The driving wheel and the driven wheel are arranged on the two ends of the magnetic field regulating grid respectively, and a gap is kept between the driving wheel and the driven wheel. Driving wheel permanent magnets are evenly distributed on the peripheral face of a driving wheel inner ring at intervals. Driven wheel permanent magnets are evenly distributed on the peripheral face of a driven wheel inner ring at intervals. A driven wheel assemble magnetic patch is arranged between the adjacent driving wheel and driven wheel. Magnetic field regulating teeth are arranged on the periphery of the magnetic field regulating grid inner ring. The arc lengths for both ends of the axial component of the T-shaped magnetic field regulating teeth are equal. An air-gap field forms a closed magnetic circuit through an axial direction air gap and a radical direction air gap. No-contact transmission is carried out under the interaction of the permanent magnet and the magnetic field. The novel magnetic gear for the two-way air-gap field has the advantages that transmission efficiency is high, reliability is high, abrasion caused by mechanical contact does not exist, lubrication is not needed, the isolating between an input shaft and an output shaft is achieved, and the overload protection function can be achieved. The novel magnetic gear for the two-way air-gap field can be widely used in the new energy field, such as wind power generation, electromobiles, and electrical ships and warships.

The invention discloses a single-motor double-shaft driving mechanism, a feeding shovel-taking stir-frying device and an automatic cooker of the feeding shovel-taking stir-frying device, the single-motor double-shaft driving mechanism comprises a motor, a Z-shaft driving assembly, an X-shaft driving assembly and an adjusting assembly, and a fixed seat is mounted on the motor; the Z-axis driving assembly comprises an outer connecting piece and a supporting arm, the outer connecting piece is rotationally connected with the fixed seat, the top end of the outer connecting piece is connected with the supporting arm, and a strip-shaped receding hole is formed in the outer connecting piece; the X-axis driving assembly comprises an inner shaft, a gear reversing transmission mechanism, a supportingplate and a sleeve which are connected in sequence, the inner shaft is connected with an output shaft of the motor, and the sleeve is rotationally connected with the supporting plate; the adjusting assembly comprises a double-head telescopic device A, a shifting plate and a shifting shaft, the shifting shaft is connected with the inner shaft, the telescopic end of the telescopic device is connected with the shifting plate, one end of the shifting plate penetrates through the strip-shaped receding hole, and a shifting groove is formed in the side, close to the inner shaft, of the shifting plate. Switching between Z-axis rotation and X-axis rotation can be achieved through rapid, direct and one-time instantaneous action control, the structure is simple, and the manufacturing cost is low.

The invention discloses a powder feeding control and recovery device. The powder feeding control and recovery device comprises a powder feeding device, wherein the discharge end of the powder feedingdevice communicates with a laser cladding operation end through a powder feeding pipe; a powder storage assembly is connected between the powder feeding pipe and the discharge end of the powder feeding device; the powder storage assembly comprises a powder inlet pipe, a reversing valve, a powder outlet pipe and a powder storage tank which are sequentially communicated; the reversing valve is a two-position three-way reversing valve; the feed end of the reversing valve communicates with the discharge end of the powder feeding device through the powder inlet pipe; the first discharge end of thereversing valve communicates with one end, far away from the laser cladding operation end, of the powder feeding pipe; and the second discharge end of the reversing valve communicates with the feed end of the powder storage tank through the powder outlet pipe. According to the powder feeding control and recovery device, the powder stabilization reservation time is avoided, the time cost is reduced, and real-time control is realized; powder in the powder storage tank can be fed back to the powder feeding device for cladding welding operation, so that powder waste is prevented, and the raw material cost is reduced; and the stability of the powder conveying amount is guaranteed, and the adverse effect of processing suspension on the powder stability is eliminated.

The invention relates to a planet magnetic meshing flexible transmission mechanism which comprises a shell, a planet magnetic wheel component, an external magnetic ring component and a central magnetic wheel component. The planet magnetic wheel component, the external magnetic ring component and the central magnetic wheel component are all arranged in the shell, the external magnetic ring component is connected with the shell, and bearings are arranged between the planet magnetic wheel component and the central magnetic wheel component, between the planet magnetic wheel component and the shell and between the central magnetic wheel component and the shell respectively. Compared with the prior art, the planet magnetic meshing flexible transmission mechanism has advantages of low loss, low noise, no maintenance, the function of protecting a torque limiter and the like.

The invention discloses a flexible connecting device for generator rotor conducting rods. The flexible connecting device comprises connecting copper bars. The connecting copper bars are V-shaped flexible connecting copper bars. The number of the V-shaped flexible connecting copper bars is two. The two V-shaped flexible connecting copper bars are symmetrically arranged in an exciter shaft or a collector ring shaft. One ends of the connecting copper bars are fit with the conducting rods in the exciter shaft or the collector ring shaft, and the other ends of the connecting copper bars are fit with the conducting rods in a generator shaft. Operating holes and ventilating holes at different radial positions are arranged on the exciter shaft or the collector ring shaft. The flexible connecting device for generator rotor conducting rods has the advantages that the assembling process is simple and the assembling accuracy and the operating difficulty are reduced; the flexible structures of the connecting copper bars can absorb deformation caused by the heating of the conducting rods at the two ends and harmful thermal stress is eliminated; the air friction loss and the noise are reduced, the device is not apt to be polluted by foreign matters and the operation reliability is improved; and the ventilating holes and the operating holes can jointly form a cooling air duct to ventilate and cool the V-shaped connecting copper bars and the conducting rods and take the effects of reducing temperature and improving current conducting performance.

An embodiment of the invention discloses a connector and an endoscope system. The connector is applied to the endoscope system; the endoscope system comprises an endoscope as well as a light source and / or a processor device which are / is detachably connected with the endoscope; the connector is arranged between the endoscope and the light source and / or the processor device and is used for establishing connection between the endoscope and the light source and / or the processor device; the connector comprises a plug arranged at one end of the endoscope as well as sockets which are arranged on the light source and / or a processor device and adapted to the plug; fixed terminals are arranged at the end part of the plug, and movable terminals adapted to the fixed terminals are arranged in the corresponding positions of the sockets; end surfaces of the fixed terminals are butted against end surfaces of the movable terminals when the plug and the corresponding socket are in a plugging connection state. The embodiment of the invention aims to solve the problem that a control signal and / or an image signal between the plug and the corresponding socket cannot be normally transmitted.

The invention relates to a magnetic gear composite multiport wave power generator, mainly composed of five concentric components. A motor inner rotor, a motor stator, a magnetic gear inner rotor, namely, a motor outer rotor, a magnetic modulation ring and a magnetic gear outer rotor are set in sequence from outside to inside. The motor inner rotor is equipped with permanent magnet and an inner rotor winding. Rotor slots are uniformly distributed on the motor rotor and are used for embedding an armature winding and a dual-redundancy winding structure is employed, so the fault-tolerant operatingcapability of a motor system is improved. The magnetic gear inner rotor is arranged at periphery space of the stator. The magnetic gear inner rotor is an annular structure. Permanent magnet poles aremounted on the outer surface of the annular structure. The magnetic modulation ring of a coaxial magnetic gear is arranged at the periphery space of the magnetic gear inner rotor. The magnetic gear outer rotor is arranged at the periphery space of the magnetic modulation ring. The magnetic gear outer rotor comprises a structure support element and a magnetic conductive iron core. The permanent magnet poles are assembled on the inner surface of the magnetic conductive iron core. The magnetic gear outer rotor and the motor inner rotor are respectively connected with a set of wave energy conversion devices.

The invention relates to the field of plastic gears, in particular to a loss correction type plastic gear treatment device. The loss correction type plastic gear treatment device aims to solve the technical problems. According to the technical scheme, the loss correction type plastic gear processing device comprises a working machine tool plate, a supporting foot stool, a mounting frame, an operation control screen, an observation camera and the like, the upper part of the supporting foot stool is welded to the working machine tool plate, the lower part of the mounting frame is welded to the working machine tool plate, the operation control screen is connected with the mounting frame, and the observation camera is connected with the mounting frame. According to the loss correction type plastic gear processing device, the effects that protrusions and burrs on the two side faces of a plastic gear are polished and removed, burrs on the outer side surfaces of gear teeth are subjected to friction loss removal by adopting meshing rotation loss of a steel gear and the plastic gear, and the burrs at tooth seams on the inner sides of the teeth are scraped and separated by attaching to the inner side surfaces of the teeth are achieved.

The present invention discloses an improved self-running slide plate whose car body can be contracted. It is characterized by that a rear axle is fixed in the inner side of two retractable slipways, a rear plate is pivoted on the middle portion of said rear axle, two rear wheels are respectively placed on two ends of said rear axle, left and right two sides of said rear plate are respectively extended downwards, a brake is placed over the rear wheel hub. Said structure is simple, and its cost is low.

The invention relates to a planetary magnetic meshing flexible speed-regulating transmission device. The transmission device comprises a housing, a planetary magnet wheel assembly, an outer magnetosphere assembly, a central magnet wheel assembly, a speed-regulating motor and a front gear case, wherein the planetary magnet wheel assembly, the outer magnetosphere assembly and the central magnet wheel assembly are arranged inside the housing, the speed-regulating motor is connected with the central magnet wheel assembly and is arranged outside the housing, the front gear case is connected with the planetary magnet wheel assembly and is arranged outside the housing, corresponding bearings are arranged among the planetary magnet wheel assembly, the outer magnetosphere assembly and the central magnet wheel assembly, the planetary magnet wheel assembly, the outer magnetosphere assembly and the central magnet wheel assembly can rotate, and three concentric rotating axes are formed. Compared with the prior art, the transmission device has the advantages that the rotation-speed relation of an input shaft and an output shaft can be regulated continuously, the loss and the noise are low, and a torsion limiting function is achieved.

The invention discloses a double-stator magnetic levitation switch reluctance starter / generator, which sequentially includes a salient pole type inner stator, a rotor and an outer stator from the inside to the outside, and the three are concentrically nested; the outer stator is equidistantly arranged with M main winding poles, and each main winding pole is provided with a main winding for starting and generating functions; N rotor salient poles are arranged at equal intervals on the rotor; O floating poles are arranged at equal intervals on the inner stator, each There is a levitation winding on each levitation pole to realize the levitation function of the rotor; the magnetic flux path of the main winding and the levitation winding are independent of each other, which solves the coupling problem between the start / power generation function and the levitation function of the rotor. The alignment area is equal to the extreme width of the suspension pole, which improves the radial suspension performance; the invention integrates the functions of start-up, power generation and rotor self-suspension, making the engine more compact and easy to maintain and control.

The invention relates to a speed-adjustable planetary magnetic meshing flexible transmission device which comprises a shell, a planetary magnetic wheel component, an outer magnetic ring component, a central magnetic wheel component and an outer ring speed adjusting component, wherein the planetary magnetic wheel component, the outer magnetic ring component and the central magnetic wheel component are arranged in the shell, the outer ring speed adjusting component is connected with the outer magnetic ring component, and corresponding bearings are arranged among the planetary magnetic wheel component, the outer magnetic ring component and the central magnetic wheel component, so that the planetary magnetic wheel component, the central magnetic wheel component and the outer magnetic ring component can rotate so as to form three concentric rotating shafts. Compared with the prior art, the device provided by the invention has the advantages of capability of continuously adjusting the relation between the rotating speeds of an input shaft and an output shaft, low loss, low noise, twisting prevention and the like.

The invention relates to the technical field of photoetching machines, and discloses a workpiece table moving device, which comprises a supporting frame, a fixed platform, a first fixing mechanism, a moving platform, a second fixing mechanism and an air floating mechanism, and a workbench moves relative to the fixed platform or the moving platform through the air floating mechanism and does not have contact friction with a supporting surface; compared with a roller plate spring mechanism, the influence of friction loss on the flatness of a supporting surface is eliminated, the positioning precision of the workpiece table is ensured, and the control difficulty in the moving-in and moving-out process of the workpiece table is reduced; secondly, the workpiece table moving device adopts a workpiece table transfer mode that the moving platform is connected with the fixed platform, so that the suspension motion stroke of the workpiece table is greatly shortened to the distance from the supporting surface of the fixed platform to the supporting surface of the moving platform, the moving-in and moving-out efficiency of the workpiece table is further improved, the operation is relatively convenient, long-distance movement of the large-mass and large-size workpiece table is achieved, and the possibility that the workpiece table falls off and is damaged is reduced.

The invention discloses a cam mechanism, which includes a seat frame, a driving part and a follower part, the driving part and the follower part are installed on the seat frame, the driving part includes a permanent magnet cam, and the slave The movable part includes a permanent magnet. When the permanent magnet cam rotates, the permanent magnet is reciprocated by the repulsive force of the permanent magnet cam and does not come into contact with the permanent magnet cam. The cam mechanism of the present invention has beneficial effects such as non-contact transmission, high output precision, no friction loss, low vibration, low impact, low noise, no need for lubrication, precise motion transmission capability, and high reliability.

The invention discloses a magnetic suspension switch magnetic resistance flywheel motor and a control method. The magnetic suspension switch magnetic resistance flywheel motor comprises an inner stator, a rotor and an outer stator. The inner stator (6), the rotor (4) and the outer stator (1) are successively nested in a concentric mode, 12 torque poles (2) are arranged on the inner wall of the outer stator (1) at equal intervals, and the torque poles are wound by main windings (3); eight rotor salient poles (5) are arranged on the outer wall of the rotor (4) at equal intervals; and four suspension poles (7) are arranged on the outer wall of the inner stator (6) at equal intervals, and the suspension poles (7) are wound by suspension force windings (8). According to the invention, the problem of incapability of effectively generating suspension forces when a stator and a rotor are not aligned by use of a conventional magnetic suspension switch magnetic resistance motor is overcome, the radial force and the torque decoupling effect are good, the radial load capability is improved, the suspension force windings are individually controlled simply according to a needed radial suspension force, each main winding on the outer stator is also controlled simply according to needed electromagnetic torque, the control is easy, and a control algorithm is simpler and is more easily realized.

The invention discloses an improved plunger type fluid pump and motor. The improved plunger type fluid pump and improved motor comprises a cylinder body which is arranged on a shaft and with a fluid cavity, multiple plunger piston components which slide in the cylinder body, a variable disc which makes contact with the plunger piston components, a variable mechanism which is connected with the variable disc, and a plunger piston holding device which holds the plunger piston components to separate or restore to make contact with the the variable disc. By means of the improved plunger type fluid pump and improved motor, the problems that the unnecessary power consumption and the temperature rise are caused due to the facts that large flow is still output by the fluid pump and the motor in an occasion and time that working is not needed and the back pressure exists, and the mechanical wear is increased are solved, so that the output flow of the fluid pump and the motor is zero when the working is not needed, and the power consumption in nonworking time is eliminated; friction pieces do not make contact with each other, so that the mechanical friction loss is eliminated, the fluid circulation is stopped, and the unnecessary fluid temperature rise is eliminated.

The invention provides a manufacturing method for a magnetosphere and Halbach array. The manufacturing method includes the steps of 1), manufacturing a stainless steel band of certain thickness and width into a circular ring; 2), manufacturing a NeFeB permanent magnet according to size of a single piece and magnetization direction regulated by the array; 3), according to a topological structure of the array, fixing a NdFeB magnetic tile of the single piece with the semicircular stainless steel band according to requirements of the Halbach array; 4), fixing a clamped component, of the NdFeB magnetic tile, obtained in the step 3) with a rolling ring welded to a tube die. By the manufacturing method, a device can be stably suspended for operation according to requirements of design, a magnetic suspension centrifuge can be operated stably and smoothly, and shortcomings of mechanical fatigue, friction loss, vibration, noises and the like brought by a reducer are overcome.