114results about How to "Reduce fever" patented technology

The invention provides a compact axial-flow magnetic-levitation artificial heart pump, in particular to an artificial heart pump characterized in that two permanent magnet bearings and a mix of radial magnetic bearing suspension, and the radial magnetic bearing and a permanent magnet motor share a stator and a rotor. The compact axial-flow magnetic-levitation artificial heart pump has the structure that the compact axial-flow magnetic-levitation artificial heart pump comprises a stator assembly, a rotor assembly, a front guidance impeller and a rear guidance impeller; a taper-shaped or axial permanent magnet bearing is respectively formed by a first permanent magnet (9) and a right permanent magnet ring (14) as well as a second permanent magnet (19) and a left permanent magnet ring (18) to realize the purpose that the rotor axially supports in a suspension mode; a torque coil (5) and a suspension coil (7) are respectively wound on a motor stator (6); and with a certain decoupling control algorithm, the motor stator not only generates torque force but also generates radial suspension support force. In the compact axial-flow magnetic-levitation artificial heart pump, the rotor is supported by permanent magnetic force and electromagnetic force, and the compact axial-flow magnetic-levitation artificial heart pump has the advantages of small damage on blood, less radiation, compact structure and the like, is easy to transplant, is suitable for patients suffering from cardiac function failure, heart diseases and the like and can be used for ventricular assisting for a long time or a short time.

The invention relates to a digital soft switch inverter arc welding machine which is controlled by an embedded system. The digital soft switch inverter arc welding machine mainly solves the technical problems of the deficiencies on the control performances and the dynamic response aspect of the traditional welding machine, difficult realization of the real-time control of the welding arc and the improvement of the reliability of an inverter welding machine and so on. A main circuit is controlled by a control circuit to realize the arc welding, the pulse width modulation adopts a soft switch phase-shifting circuit; a pulse drive and protection circuit adopts a drive two magnetic tank type pulse transformer, a capacitor, a twisted-pair line, a TVS tube and a resistor are simultaneously added for continuous protection, thus preventing over-voltage and misconduction of IGBT which is caused by the over-voltage. The digital soft switch inverter arc welding machine is mainly used for various welding.

The invention discloses a stator and rotor structure of a permanent magnet motor, wherein the stator and rotor structure can enable the magnetic reluctance phase difference of a quadrature-direct axis magnetic circuit to become smaller and the magnetic flux leakage to be reduced. The structure comprises a stator core and a rotor core, wherein the stator core is provided with a plurality of stator grooves and stator teeth; a plurality of pairs of magnetic poles are uniformly distributed at the periphery of the rotor core; the bottom of each stator groove is composed of a circular arc and a linear which is connected at two ends of the circular arc, the ratio of the diameter of the circular arc to the outer diameter of the stator core is 0.7-0.74; the ratio of the difference between the outer diameter of the stator core and the outer diameter of circular arc of the stator core to the double value of the width of each stator tooth is 1.1-1.3; the rotor core is provided with magnetic grooves corresponding to the inner sides of the magnetic poles; two ends of each magnetic groove are respectively provided with a separated magnetic air gap, and the separated magnetic air gaps are communicated with the two ends of each magnetic groove; a plurality of strip-shaped magnetic bundle settling grooves are arranged between each magnetic groove and the corresponding outer end surface of each magnetic pole; and a groove is respectively arranged between two adjacent poles.

The invention discloses a pump-controlled power recovery hydraulic control system of a hydraulic cylinder testing test stand. The pump-controlled power recovery hydraulic control system of the hydraulic cylinder testing test stand comprises a tested hydraulic cylinder pump control system which is used for controlling the moving speed and the displacement of a tested hydraulic cylinder, a loading hydraulic cylinder pump control system which is used for controlling loading force of a loading hydraulic cylinder, an auxiliary system which is formed by a low-pressure oil replenishing system and a control oil system, and a power recovery system. A main pump motor, a main pump and a loading motor are coaxially and mechanically connected, the main pump motor is used for driving the main pump, most output power of the main pump is finally recovered to the loading motor, the loading motor drives the main pump through mechanical transmission and the power repetitively circulates among the main pump motor, the main pump, the loading motor and the main pump to achieve the goal of power recovery. The pump-controlled power recovery hydraulic control system of the hydraulic cylinder testing test stand has the advantages of low energy consumption, less emitted heat, low installed power and the like by adopting a closed pump control system.

The invention discloses a method for manufacturing a medium and high-voltage anode aluminum foil for an aluminum electrolytic capacitor, which sequentially comprises the following steps of: 1) pretreating an optical foil; 2) putting the optical foil into acid solution in a ratio of chloride ion to sulfate ion of 5-15:1, then applying an alternating current with the current density of 60 to 100mA/cm<2> to the optical foil for primary corroding and hole forming, then putting the optical foil into acid solution in the ratio of the chloride ion to the sulfate ion of 1:9.5-16, and then applying a direct current with the current density of 250 to 300mA/cm<2> to the optical foil for primary corroding and hole forming; 3) after primary cleaning, performing secondary corroding and reaming on the optical foil in the acid solution; 4) after secondary cleaning, drying the optical foil by using a drying furnace to obtain the corroded foil finished product; and 5) performing conversion coating on the corroded foil finished product to obtain the medium and high-voltage anode aluminum foil finished product. In the method for manufacturing the medium and high-voltage anode aluminum foil for the aluminum electrolytic capacitor provided by the invention, the surface dislocation and defect parts of the optical foil are subjected to pitting by the alternating current, and then the optical foil is subjected to primary corroding and hole forming by the direct current, so that heating is reduced, the deformation of the aluminum foil because of heating is prevented, the surface expansion rate of the aluminum foil is increased, and specific volume is improved greatly.

The invention discloses a three-station isolating switch which comprises a rack, disconnecting links, fixed contacts, grounding contacts and an operating mechanism. The rack is connected with a rotating shaft in a pivotal mode, and the rotating shaft drives the disconnecting links to rotate through first connecting levers and insulating pull rods. The operating mechanism comprises a shell, the shell is connected with a first operating shaft and a second operating shaft in a pivotal mode, and the first operating shaft is fixedly connected with the rotating shaft. The first operating shaft is fixedly connected with a first gear and an isolating limiting plate. The isolating limiting plate is provided with a first positioning hinge pin in a penetrating mode, and the two ends of the first position hinge pin are connected with the first operating shaft through two tension springs. The shell is provided with a switching-on groove, a switching-off groove and grounding grooves which are matched with the first positioning hinge pin. The second operating shaft is fixedly connected with a second gear and a connecting lever, wherein the connecting lever is connected with the shell through a second positioning hinge pin and a compression spring. The shell is provided with a second arc hole which is matched with the second positioning hinge pin. The second gear is not matched with the first gear in a switching-on state and a switching-off state and is matched with the first gear in a grounding state. The three-station isolating switch is compact in structure, reliable in action and convenient to maintain.

The invention provides a railway fastener self-adaptive positioning method based on an image sequence and a high-speed detection system. The system consists of detectors, a cable and a controller, wherein four detectors are arranged below train carriages, and are over against the upper sides of regions where fasteners on both sides of two steel rails are positioned respectively; a controller is arranged in a carriage, and is connected with the four detectors through the cable; in the running process of a train, the detectors work continuously and are used for acquiring images of regions where the fasteners are positioned and transmitting to the controller via the cable; the controller is used for automatically adjusting the sampling frequency of a camera according to the appearance frequencies of the fasteners in the acquired image sequence and the positions of the fasteners in a visual field through image processing and mode identification, so that self-adaptive positioning and detection of the fasteners are realized.

The invention discloses a symmetric electromagnetic actuator which comprises magnet yoke assemblies, armature assemblies and baffle assemblies. The magnet yoke assemblies and the armature assemblies are connected through leaf springs. The magnet yoke assemblies are movable assemblies. The armature assemblies are static assemblies. The magnet yoke assemblies reciprocate under the action of the armature assemblies to as to control a controlled object. The baffle assemblies are used for limiting the movement of the magnet yoke assemblies. The number of the magnet yoke assemblies is two, the number of the armature assemblies is two, and the number of the baffle assemblies is two. The two magnet yoke assemblies are symmetric, the two armature assemblies are symmetric, and the two baffle assemblies are symmetric. According to the symmetric electromagnetic actuator, actuating force is obviously improved through two sets of electromagnetic structures, and the symmetric electromagnetic actuator is small in size and small in mass and leakage flux.

The invention relates to a constant-pressure variable intelligent air compressor, which comprises an electric motor and a compressor host, wherein the electric motor is a rare earth permanent magnet synchronous motor, a motor shaft of the rare earth permanent magnet synchronous motor and a male rotor shaft of a male rotor form an integrated structure, and the motor shaft is formed by extending the male rotor shaft into a shell of the electric motor; the air compressor further comprises a frequency converter, an intelligent controller, a pressure transmitter and a temperature sensor; he output end of the intelligent controller is connected with the electric motor through the frequency converter, and is connected with the compressor host through a loading and unloading electromagnetic valve; the pressure transmitter and the temperature sensor are respectively arranged on an exhaust port and a compressed air inlet of the compressor host, and the output end of the pressure transmitter and the output end of the temperature sensor are respectively connected with the input end of the intelligent controller. According to the invention, the volume, the weight and the loss of the air compressor are remarkably reduced, heating is reduced, and efficiency is improved, and actions, such as soft start, constant-pressure air supply, noise reduction, energy conservation and the like, can be realized.

The invention discloses a time delay compensation method of a high-dynamic motor servo control system. The time delay compensation method comprises the following steps of obtaining motor motion state information at current control period sampling time; obtaining the motor motion state information at previous control period sampling time; and compensating a motor space control vector at the next control period sampling time according to the motor motion state information at the current control period sampling time and the motor motion state information at the previous control period sampling time and completing time delay compensation of the high-dynamic motor servo control system. The high-dynamic response performance of a motor is effectively improved and the efficiency of the motor is improved through reducing a data calculation error, caused by a program calculation time delay, of the motor control system; through the system employing three closed-loops of a position loop, a speed loop and a current loop, high-dynamic stable control of a motor steering gear system is achieved.

The invention discloses a lowering control system for a movable arm of a hydraulic excavator for mines, and relates to a hydraulic excavator. The system solves the problems that the prior art can only control the lowering speed of the movable arm and cannot utilize the impact energy generated by dead weight so as to cause energy waste. The system consists of a main pressure oil passage and a pilot control oil passage, wherein the main pressure oil passage consists of a left shunt block, a right shunt block, a left one-way throttling valve, a left movable arm cylinder, a safety valve, a right movable arm cylinder, a right one-way throttling valve and a hydraulic pipeline; and the pilot control oil passage consists of a remote control valve, an electromagnetic switching valve, a left movable arm cylinder one-way valve, a left movable arm cylinder regeneration valve, a right movable arm cylinder regeneration valve, a right movable arm cylinder one-way valve, an oil tank and a hydraulic pipeline. In the process of lowering the movable arm, the impact energy generated by lowering due to the dead weight of the movable arm is fully utilized for regeneration, so energy is saved, heating of a hydraulic system is reduced, lowering of the movable arm is quickened, and the work efficiency of the hydraulic system of the hydraulic excavator for mines is improved.

The invention discloses a testing system and a testing method for high speed performance of aerostatic thrust bearings. The testing system comprises an annular casing, wherein a central spindle is arranged in an inner cavity of the annular casing; two aerostatic radial bearings are arranged in the middle of the central spindle; a rotary disk is arranged on a right extending section of the centralspindle; the two aerostatic thrust bearings are arranged on each of the left side and the right side of the rotary disk; a gas supply pipeline simultaneously supplies gas to the two aerostatic radialbearings and the two aerostatic thrust bearings, so that the central spindle is suspended; a turbine is fixed on a left extending section of the central spindle; a left cover plate covers the turbine;second gas supply holes introduce gas into the left cover plate to drive the turbine to rotate; the left side of the turbine is locked by a locking nut; a loading hole introduces the gas into a loading cover to apply axial pressure to the left end face of the central spindle; the testing system further comprises a detection part and a gas supply part. The testing system and the testing method disclosed by the invention have the advantage that various performance parameters of the aerostatic thrust bearings can be tested at different rotating speeds and gas supply pressures.

The invention relates to a voice coil motor possessing a gravity compensation function. The motor comprises external back iron, a magnetic steel assembly and a coil. The external back iron is cylindrical back iron or two pieces of plate-shaped back iron. The magnetic steel assembly is arranged in the external back iron. The coil is arranged between an inner side of the external back iron and an outer side of the magnetic steel assembly. The coil and the magnetic steel assembly can carry out relative movement. A magnetic flux saturation degree of the external back iron changes from being small to being large along a gravity direction. Through setting the external back iron whose magnetic flux saturation degree changes from being small to being large along the gravity direction, a motor possesses a relatively stable upward force which is taken as gravity compensation so that motor heat is reduced.

The invention discloses a low-back-clearance robot speed reducer. The low-back-clearance robot speed reducer comprises a wheel base, a needle tooth shell, a first cycloidal gear, a rolling needle, a second cycloidal wheel, a gland, an elastic piece, cross slide blocks and a crankshaft; two cycloidal wheels are provided, and form a phase relation of 180 degrees; the cycloidal wheels belong to multi-point engagement transmission relation with the needle tooth shell and the rolling needle; two cross slide blocks are provided, and form a double-cross-slide-block structure; groove types of the slide blocks are trapezoidal groove structures; a clearance is automatically compensated through the elastic piece; and the rotating center of the crankshaft is coaxial with the wheel base and the gland. The low-back-clearance robot speed reducer adopts single-crankshaft cycloidal needle wheel to drive, adopts the cross slide block structures to output, belongs to first-grade speed reduction transmission, and has the characteristics of high efficiency and low back clearance.

The invention provides a control method and system of air conditioner carrier frequency, an air conditioner, a computer device and a computer readable storage medium. The control method of the air conditioner carrier frequency comprises the steps that the rotating speed of a compressor of the air conditioner is acquired in real time; the rotating speed of the compressor and the preset rotating speed are compared; if the rotating speed of the compressor is lower than the preset rotating speed, the carrier frequency of the air conditioner is set to be the first preset carrier frequency; if the rotating speed of the compressor is higher than or equal to the preset rotating speed, the carrier frequency of the air conditioner is set to be the second preset carrier frequency; and the second preset carrier frequency is larger than the first preset carrier frequency. According to the technical scheme of the control method and system, when the rotating speed of the compressor is low, low carrier frequency is adopted, the opening and closing loss of a module is reduced, and the heating of the module is reduced; and when the rotating speed of the compressor is high, high carrier frequency isadopted, the noise of the compressor is reduced, the heating of the compressor is reduced, and the control performance and the stability of the system are improved.

The invention relates to the field of plant seedling culture, in particular to a plant seedling culture method, which is suitable for culturing strong seedlings during leaf vegetable plant seedling culture. At a strong plant seedling culture stage of the culture method, red LED (light-emitting diode) lamps and blue LED lamps are used for irradiating plants to culture strong seedlings in a strong seedling culture box, wherein the daytime temperature of the strong seedling culture box is kept to be 23-27DEG C, the nighttime temperature of the strong seedling culture box is kept to be 15-20DEG C and the relative humidity of the strong seedling culture box is kept to be 70-80 percent. The plant seedling culture method has the advantages that the aboveground parts of small seedlings can be enabled to be strong, the photosynthesis is promoted, the underground parts of the small seedlings are well-developed, the absorption of water and nutrient substances is promoted, the growth of the plants is facilitated, the transplanting survival rate is improved, the seedling culture period and the transplanted seedling resuming growth period are shortened, and the yield is improved.

The invention discloses a common-rail oil sprayer. The common-rail oil sprayer is characterized in that a control cavity comprises a control piston, an oil sprayer body and an orifice plate. The common-rail oil sprayer has the advantages that the shape of the bottom of the orifice plate and the shape of the top of the control piston are reasonably designed, so that throttle belts can be formed by the control piston and the bottom of the orifice plate when oil is sprayed by the oil sprayer, throttle effects can be realized, dynamically returned oil of the oil sprayer can be greatly reduced, heat generated by the oil sprayer can be decreased, and power loss of an oil supply pump can be reduced; throttle belt gaps between the bottom of the orifice plate and the head of the control piston are precisely designed, so that the piston is in a completely floating state after being completely lifted up; the throttle belt gaps between the control piston and the bottom of the orifice plate are automatically adjusted in a floating manner by the aid of hydraulic balance, so that pressure difference of the control cavity due to assembly errors and different throttle belt gaps can be reduced, and the assembly consistency of the oil sprayer can be improved.

The invention discloses a hoister with dual transmission chains. The hoister comprises a driver, two transmission mechanisms and a drum, which are sequentially connected one after another, wherein, one transmission mechanism is an ascending transmission mechanism and the other one is a descending transmission mechanism; the ascending transmission mechanism adopts a straight gear transmission pair and the descending transmission mechanism is provided with a worm and worm rod transmission pair. The hoister uses the straight gear transmission chain with high transmission efficiency when hoisting the heavy article and automatically uses the worm and worm rod transmission chain with the self-locking function during the descending process; the two transmission chains can reliably achieve the object that the energy utilization ratio can be improved when the hoister ascends and the brake disc (belt) can be removed when the hoister descends, thus improving the controllability and the reliability and reducing the weight of the equipment.

The invention relates to a capacitor, and particularly provides a direct-current support capacitor capable of effectively absorbing high-frequency harmonic waves. The direct-current support capacitor structurally comprises a shell, a core group and a composite copper bar are arranged in the shell, the core group is connected with the composite copper bar through a copper hose, two-electrode leading-out ends are welded on the composite copper bar, and potting materials are filled inside the shell and used for fixing the core group and the composite copper bar in the shell. Compared with the prior art, the direct-current support capacitor has the advantages that the design thinking of a traditional branch support thin-film capacitor is changed, the direct-current support capacitor is better in harmonic wave absorbing performance, more convenient to mount, safer and more reliable, and the service life and stability of the direct-current support capacitor can be effectively guaranteed.

The invention discloses an active and passive magnetic gas hybrid bearing. The active and passive magnetic gas hybrid bearing is a hybrid bearing suspension bearing which is composed of a stator 1, acoil 4, a permanent magnet 5, a gas foil bearing 13 and an auxiliary supporting structure, namely a left insulating liner 2 and a right insulating liner 3, wherein the coil is wound around a magneticpole 9, the permanent magnet 5 is installed at a magnetic pole gap 10 close to the center position, and the permanent magnet and an electromagnetic magnetic circuit are kept in the same direction; andthe gas foil bearing 13 is installed on a bearing base composed of the left insulating liner 2, the right insulating liner 3 and the permanent magnet 5 and is fixed through a cylindrical pin 8. The active and passive magnetic-gas hybrid bearing has the comprehensive characteristics of an active magnetic suspension bearing, a passive magnetic suspension bearing and a foil bearing; a magnetic fieldgenerated by a permanent magnet 8 replaces a static bias magnetic field of an electromagnet, so that the power consumption of a power amplifier is remarkably reduced; when a rotor rotates at a low speed, the permanent magnet 8 and a electromagnetic bearing provide load, and when the rotor rotates at a high speed, the foil bearing 13 and the permanent magnet 8 provide load, and the electromagneticbearing provides extra dynamic rigidity and damping to realize adjustment of bearing capacity of the bearing and improvement of stability.

The invention discloses a fluid end structure of a reciprocating pump. The fluid end structure of the reciprocating pump comprises a supporting main pump body, a valve cavity body fixedly connected with the supporting main pump body and a plunger piston. The plunger piston penetrates the supporting main pump body and stretches into a first cavity of valve set modules. The outer wall of the plungerpiston is sleeved with a main seal box assembly and an auxiliary seal box assembly. The main seal box assembly is arranged between the outer wall of the plunger piston and the supporting main pump body. The auxiliary seal box assembly is arranged between the outer wall of the plunger piston and the main seal box assembly. Lubricating grease is fed into the main seal box assembly and the auxiliaryseal box assembly of the fluid end structure, friction between the plunger piston and packing can be reduced, heat can be reduced, and the service life of the plunger piston and the service life of the packing can be prolonged. The valve set modules can be freely combined in different machine types to adapt to various media, high-pressure liquid conveying can be achieved, a valve core adopts nonmetal and metal combined type seal, nonmetal valve face contact is carried out before metal valve face contact is carried out, and the service life of a valve set is prolonged.

The invention provides a microwave ablation antenna. The antenna is provided with an antenna body, the antenna body comprises an inner conductor, and the outer side of the inner conductor is sequentially covered with a dielectric, an outer conductor and a shell; the antenna body extends in the axial direction, one end of the antenna body is used for being connected with a coaxial cable, the otherend of the antenna body is an antenna tail end, and the portions, at the antenna tail end, of the outer conductor and the inner conductor protrude out of the dielectric and are welded to each other; three gaps are girdled in the portion, close to the antenna tail end, of the outer conductor; the dielectric in the middle of the antenna body is axially and sequentially provided with a dielectric hollowed-out section and a thickened outer conductor extending inwards from the outer conductor. According to the microwave ablation antenna, the large ablation long diameter and ablation sphericity areobtained through a three gap joint, the ablation radius is increased through the cooperation with a pi matching joint, the comet tail effect can be well eliminated under the condition of not increasing the diameter of the antenna, the ablation sphericity is increased, the sphericity of an ablation area cannot be significantly reduced even if the microwave power is increased, and the large-range high-sphericity ablation area can be formed.

The invention discloses a charging control method, apparatus, adapter and system. The charging control method comprises the following steps: detecting a temperature value of a plurality of heating sources in the adapter, when determining that a highest temperature value in the temperature values of the plurality of heating sources reaches a preset temperature value, transmitting an instruction for detecting whether a working state of a terminal is in a standby state and detecting whether a battery capacity is greater than a preset battery capacity to a mobile terminal, and correspondingly adjusting a charging current outputted by the adapter according to a detection result returned by the mobile terminal, and a correspondence table of the preset temperature range and the preset charging current. By virtue of the embodiment of the invention, not only can the heat of the adapter be reduced, but also the rapidness in charging can be realized, and the charging temperature of the adapter can be controlled in a reasonable range while the hardware performance of the adapter is protected.

The invention relates to a mobile radiology film viewing device, which belongs to the field of medical equipment. The mobile radiology film viewing device includes a base assembly, an adjustment device connected to the base assembly, a film viewing platform device connected to the adjustment device, and a film viewing light box connected to the film viewing platform device; the film viewing light box includes a light box body, and is arranged on The opening end face around the edge of the light box body, the clamping device set on the opening end face, the light-transmitting plate set on the center of the light box body, the LED light tube set on one side of the light-transmitting plate, the heat dissipation set on the side of the LED light tube The blower fan, the LED lamp control switch arranged on the top of the light box body, and the magnifying glass assembly arranged on one side of the top of the light box body. In the present invention, universal wheels are provided to facilitate the movement of the film viewing device, and a rotating disk is provided to facilitate the adjustment of the angle of the film viewing device. LED lamp tubes are provided, which consume less energy, do not flicker, and generate less heat. The temperature will not be too high, and a magnifying glass component is set to facilitate medical staff to view the film.

The invention relates to an adaptive cold light source, which consists of a case, a power circuit board, a bulb, a light guide bundle connector, a control circuit, a cooling fan, a motor, a shading plate and a video input terminal. A video signal is connected into the control circuit; the video signal is subjected to amplification of a video amplifying circuit and analog-to-digital conversion, and then is analyzed and processed by a CPU to have a maximum value; and by using the value, a motor dimming circuit controls the motor to drive the shading plate to rotate at different angles so as to control the output light intensity through non-shading, partial shading and full shading for the output light, and the output light intensity is adaptively adjusted so as to fulfill the aim of an light-source adaptive camera for luminance requirement and provide luminance required for the camera and a photographed object.

The invention relates to an electric vehicle brushless motor controller based on a vector control concept. The electric vehicle brushless motor controller comprises an error detector, an SVPWM motor vector controller, a PI control unit, a weak magnetic angle sampling unit, a current sampling unit and a rotation speed sampling unit which form weak magnetic angle and current feedback inner closed-loop control and speed outer closed-loop control, wherein a current sampling element in the current sampling unit is a surveying brass wire, and the rotation speed sampling element is an HALL sensor. The electric vehicle brushless motor controller satisfies the wide speed regulation range performance of the whole vehicle under a normal condition, adopts an SVPWA technology in the vector control, ensures that an upper MOS tube and a lower MOS tube heat more evenly, and effectively prolongs the service life of the controller; and meanwhile, the invention has less motor impulse, higher operation efficiency, smaller current, lower noise, more comfortable driving feeling and low cost and is suitable for electric vehicles.

The invention discloses a self-damping vibration elimination magnetic levitation artificial heart blood pump rotor and a preparation method thereof, which comprises a ring-shaped rotor body which is suspended at the middle of a blood pump through a magnetic levitation system, wherein the rotor body rotates around a rotating shaft which is positioned at the middle of the rotor body, the rotor body is internally provided with a hollow part, at least one damping block is placed in the hollow part, the damping block is connected with the rotor body through an elastic connector, and the hollow part is filled with damping liquid. The invention has the main beneficial effects that as the damping block and the damping liquid are arranged, damping can be provided for the swinging and the vibration of the rotor in the interior of the rotor, accordingly, the vibration of the blood pump rotor, caused by various imbalances, can be greatly reduced, the heat of the magnetic levitation system can be reduced, the scraping between the blood pump rotor and a stator can be reduced, the probability of failure of the magnetic levitation can be greatly reduced, and further, the reliability and the comfortableness of an artificial heart system can be improved.

The invention provides a working frequency adjusting method and device and a server. The server includes a substrate management controller. The method includes: continuously acquiring hardware parameters of multiple hardware of server, and detecting whether that acquired hardware parameters satisfy corresponding preset frequency reduction condition; when it is detected that a plurality of the hardware parameters satisfy the corresponding preset down-conversion condition, sending a down-conversion instruction to a processing chip of the server to reduce the calorific value of the processing chip. As such, CPU down-conversion action is actively triggered in combination with a plurality of factors, the trigger condition is more comprehensive, the frequency down-conversion can be triggered more effectively, and excessive heating of the server can be prevented.

The invention relates to an LED illumination control system including a master controller and a sub-controller. The master controller includes a switch tube and a micro-controller circuit. The sub-controller includes a signal sampling circuit, a micro-controller circuit, a voltage-stabilizing circuit and a driving circuit. An output end of the switch tube of the master controller is connected serially between direct-current electricity transmission and signal lines through which direct current is transmitted to the sub-controller. A control end of the switch tube of the master controller is connected with a signal-output end of the micro-controller circuit of the master controller. A signal-input end of the signal-sampling circuit of the sub-controller is connected with a power input end of the voltage stabilizing circuit and the direct-current electricity transmission and signal lines and a signal-output end of the signal-sampling circuit of the sub-controller is connected with a signal-input end of the micro-controller circuit. The signal-output end of the micro-controller circuit is connected with a signal-input end of the driving circuit. A control output end of the driving circuit is connected with a load. The other end of the load is connected with the direct-current electricity transmission and signal lines. Through use of the two direct-current electricity transmission and signal lines, the LED illumination control system enables power supply and control of the sub-controller and the load of the sub-controller by the master controller to be realized and a problem, which exists in the prior art, that the LED illumination control system cannot be used directly on a two-wire illuminating line which is already well laid is solved.

The invention discloses a low-noise low-heat water cooling electric reactor which comprises a housing, a cooling pipe, a wire and a conduction magnetic core. The cooling pipe comprises a left cooling water pipe joint, a left insulating sheath, a cooling pipeline, a right insulating sheath and a right cooling water pipe joint which are sequentially connected; the left cooling water pipe joint is arranged on the housing by the left insulating sheath; the right left cooling water pipe joint is arranged on the housing by the right insulating sheath; the wire is wound on the conduction magnetic core and is fixedly arranged on the housing by a left connection terminal and a right connection terminal of the wire; and insulating resin is encapsulated in the housing. The low-noise low-heat water cooling electric reactor has a small size, a low heating value and a good cooling effect; the heating value is reduced by 50 percent; the service life of the electric reactor is doubled; the heat radiation for peripheral devices is low; and the insulating resin is encapsulated, so that the low-noise low-heat water cooling electric reactor has a good insulating effect and a high safety performance, the noise is reduced from 100 decibels to 30 decibels and the damage to a human body is reduced.