494results about How to "No lubrication" patented technology

This invention relates to an electromagnetic progressive shaping method for plate moving coils and a device, in which, said device includes a computer control system, an electromagnetic force generation system and a three-shaft digital control shaping system including a plate clamping elevating device, a supporting model frame and an electromagnetic shaping clamping rod, in which, the computer controls the coil to move downward along the contour of a model profile from the top according to the contour data of the model profile and the plate is formed partly relying on the magnetic force of coil till to the bottom of the model and finish the entire process.

The invention belongs to the technical field of vibration and noise control and relates to a relatively-high-applicability passive isolation technology for ultralow-frequency vibration. In order to effectively solve the problem between the low-frequency vibration transmissibility and the high-frequency vibration attenuation rate of the vibration isolator, the invention provides the stiffness-adjustable magnetic vibration isolator with quasi zero stiffness, which adopts rectangular permanent magnets generating negative stiffness and an elastic capsule providing positive stiffness; and when a load is changed, the working position of the elastic capsule is controlled unchanged, the positive stiffness of the elastic capsule is changed because the pressure inside the elastic capsule is changed, and then, the negative stiffness is matched with the positive stiffness through regulating the distance among the rectangular magnets, so that the stiffness-adjustable magnetic vibration isolator with quasi zero stiffness is adaptable to vibration isolation objects with different weights. The stiffness-adjustable magnetic vibration isolator with quasi zero stiffness is simple in structure, convenient to mount, adjustable in bearing capacity, excellent in vibration isolation property, compact in structure, light in weight and suitable for popularization and application.

The invention discloses a flexible micro-positioning stage with two degrees of freedom, the design of the flexible micro-positioning stage with two degrees of freedom comprises a flexible mechanism and an integral structure, two piezoelectric ceramic drivers are adopted in the structure, the tail part of each driver is connected with a base through a bolt, and the top end of each driver is connected with a spherical joint through a thread, thereby realizing Hertz contact. The flexible mechanism of the positioning stage mainly comprises three parts of the base, flexible branched chains with entirely consistent structures and a supporting movable platform thereof. Two displacement sensors are used for measuring actual output of the movable platform and respectively fixed between the base and the movable platform through an L-shaped support and a Z-shaped support. The flexible micro-positioning stage is characterized by high resolution and fast dynamic response speed, and can be taken as an auxiliary positioning platform of a nano-imprint lithography positioning system for realizing micro-feeding and precise positioning.

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 discloses a three-degree of freedom flexible precision positioning workbench. In a structure of the workbench, six piezoelectric ceramic drivers are adopted, the tail of each driver is connected with a substrate through bolts, and the top end is in threaded connection with a ball joint to realize hertz contact; a flexible structure of the positioning workbench mainly comprises the substrate, six flexible branched chains with identical structures and a movable platform supported by the flexible branched chains; and three position sensors are used for measuring the actual output of the movable platform and are respectively fixed between a rigid support and the movable platform. The precision positioning workbench has the characteristics of high resolution ratio and high speed of dynamic response, and can be used as an assisted positioning platform of a nano-imprint lithography positioning system to realize microscale feeding and precision positioning.

The invention provides a pneumatic type soft motion robot based on an earthworm motion principle. The robot comprises a first body part, a second body part and a third body part, wherein the first body part is connected with the second body part through a first telescopic part, the second body part is connected with the third body part through a second telescopic part, and the first body part and the second body part are controlled by a controller arranged on the second body part to stretch and retract; and mechanical steel bristles are arranged at the lower portion of the first body part and the lower portion of the third body part. By the adoption of the robot, a robot motion model is established according to the earthworm motion mechanism, and through the mechanical steel bristles, pneumatic control replacement and simulation of stretching and retracting of transverse muscles and longitudinal muscles of an earthworm, the robot can conduct complex actions of walking straightly, making a turn, crossing an obstacle and the like in a severe environment. Through intelligent control, the robot can be used in industrial pipeline exploration and disaster search and rescue.

A precise positioning platform consists of output platform, base, three gentle and agreeable mechanisms, three piezoelectric drivers, three positioning devices, three displacement sensors and controllers. It is featured as arranging mechanism and sensors in 120 degree angle towards outside along output platform to ensure precision, stability and linearity of movement and to provide translation in X and Y direction as well as rotation in Z direction, using drivers to ensure quick response speed for achieving nanoresolution and subnauoprecision of positioning.

The invention discloses a two-degree of freedom precise positioning work table, which comprises a base, a moving platform, a rigid support which is connected with the bottom of the base, and four flexible branched chains which are connected between the moving platform and the base, wherein each flexible branched chain comprises a moving block and three groups of flexible plate spring structures; each flexible plate spring structure consists of two '-'-shaped flexible plate springs; a first group and a second group of the flexible plate spring structures are respectively positioned at the left side and the right side of the moving block; the lower ends of the two '-'-shaped flexible plate springs of a third group of the flexible plate spring structures are connected with the side wall of the upper end of the moving block, and the upper ends thereof are connected with the side wall of the moving platform; four piezoelectric ceramics driving devices are respectively horizontally arranged; a ball-shaped joint of each driving device is supported on the side wall of the lower end of the moving block; and conducting strips of two position sensors are respectively connected with the upper plane of the rigid support and the lower plane of the moving platform. The positioning work table can be taken as an auxiliary positioning platform of a nanometer embossing photoetching positioning system to realize the microscale feeding and the precise positioning.

A movable optical element adjusting and positioning device relates to a photoetching apparatus. A movable lens set in the device is fixed on a main lens cone by a laminated spring plate and can move along an optical axis or carry out horizontal inclination adjustment under the action of a driving motor. The driving of the driving motor adopts a long handle of a level mechanism in a driving mechanism of a gapless flexible bearing, and a short handle thereof drives the movable lens set to move along the optical axis. The adjusting and positioning device achieves an axial movement accuracy which can be lower than 0.5 microns and a horizontal adjustment accuracy which can reach 0.5mrad. The adjusting and positioning device has compact structure, stable operation, no friction or lubrication, low hysteresis and good repeatability, and the movement stroke of the movable lens set can reach 0.2 mm and the linearity is good.

The invention discloses a fast steering mirror. An upper support frame is sequentially connected with an auxiliary mirror bracket and a main mirror bracket by an elastic bracing frame, and the main mirror bracket and the auxiliary mirror bracket are respectively fixed with a main mirror and an auxiliary mirror; four linear voice coil motors are symmetrically arranged on the surface of the upper bracing frame, and the center is provided with a through hole; a semiconductor laser, a position sensitive detector and a spectroscope tilting 45 degrees are respectively arranged under the upper bracing frame, wherein, laser emitted from the semiconductor laser passes through the spectroscope and the through hole and reaches the auxiliary mirror, the auxiliary mirror reflects the laser back to the spectroscope, and then the spectroscope reflects the laser to the position sensitive detector. The fast steering mirror has the advantages of compact structure, high angle control precision, no friction loss and high resonance frequency, can be widely used in the fields such as space optical communication, adaptive optical compensation, laser processing, laser radar and the like.

The invention relates to an active maglev electromagnetic catapult for aircraft carriers. The active maglev electromagnetic catapult comprises a maglev guide rail fixed on a catapult base, a catapult platform sleeved on the guide rail, and a linear motor. The shipboard aircraft catapult platform is supported by active maglev supporting technology and is driven by the high-power linear catapult motor, and catapult-assisted take-off of shipboard aircrafts is achieved. The active maglev supporting technology is introduced, a catapult platform position control system and a speed control system are provided, and accordingly positioning precision and catapulting speed of the catapult platform are increased greatly, electrification is achieved and the service life is prolonged. The active maglev electromagnetic catapult has the advantages of adjustable supporting rigidity and damping, no friction, no need of lubrication, no environment pollution and the like.

The invention relates to a magnetism transmission gear pair of a novel transverse magnetic field, which can be widely applied to wind power generation, electric cars, ship drive and other industrial transmission fields requiring direct drive. The magnetism transmission gear pair is characterized in that a driving wheel and a driven wheel of the magnetism transmission gear pair are of a flat disk shape, 2pr driving wheel permanent magnets 3 are distributed on the driving wheel, and 2ps driven wheel permanent magnets 7 are distributed on the driven wheel; a ferromagnetic magnetic modulation grid 6 playing a role of modulating an air-gap magnetic field is arranged between the driving wheel and the driven wheel, air gaps are reserved between the ferromagnetic magnetic modulation grid 6 and the end surfaces of the driving wheel and the driven wheel, and the ferromagnetic magnetic modulation grid 6, the driving wheel and the driven wheel have no mechanical contact and are distributed along the same axis; the air-gap magnetic field Bg passes through an air-gap plane along a route parallel to a rotation axis to form a transverse magnetic field of the magnetism transmission gear pair; and during working, power speed change transmission without mechanical contact and friction is realized by utilizing a principle of heteropolarity attraction of an N pole and an S pole of a permanent magnet material.

The invention discloses an automatic lifting system. The automatic lifting system comprises a control device, a driving device and a lifting device which are electrically connected together, wherein the driving device and the lifting device are controlled by the control device; the lifting device is connected with an external work table; the control device drives the driving device, so that the lifting device drives the external work table to make straight reciprocating motion; the lifting device comprises a first retaining plate, a second retaining plate, a movable plate, a lead screw, a lead screw nut and a supporting column; the movable plate is arranged between the first retaining plate and the second retaining plate; the driving device is fixed to the first retaining plate; the lead screw nut is inserted into and fixed on the movable plate; one end of the lead screw passes through the first retaining plate and is connected with the driving device, while the other end passes through the lead screw nut and then is connected with the second retaining plate; and one end of each supporting column is fixed to the movable plate, while the other end passes through the second retaining plate and protrudes on the second retaining plate to be connected with the external work table. The system has the advantages of high movement accuracy, high reliability, low noise, low pollution and simple structure.

The invention relates to a piezoelectric actuator, in particular to an inner driving type passive clamping piezoelectric actuator. The problems that according to an existing inner driving type clamping piezoelectric actuator, self locking cannot be achieved during outage, a driver is slow in running speed, and requirements for machining accuracy of a clamping body and a guiding track are high are solved. The inner driving type passive clamping piezoelectric actuator comprises a guiding track, driving bodies, a driving piezoelectric stack, two clamping piezoelectric stacks and two clamping bodies. Each clamping body comprises a piezoelectric stack pre-tightening piece, two clamping triangle amplified flexible hinges, two clamping piezoelectric stack supporting bodies and two clamping heads. Each driving body comprises two driving triangle amplified flexible hinges, two driving piezoelectric stack supporting bodies and two driving piezoelectric stack pre-tightening pieces. The driving bodies connected with the clamping bodies are arranged between the two clamping bodies. The driving bodies and the clamping bodies are placed in grooves of two arms of the guiding track. The piezoelectric actuator is used in a micro-driving process.

The invention discloses a two-freedom-degree, large-travel and large-load micro-positioning platform which comprises an upper platform and a lower platform. The lower platform is provided with a base. The upper platform comprises a central movable platform. The movable platform is connected with the base through four flexible standing columns. The four flexible standing columns are distributed at four corners below the movable platform. Each flexible standing column is formed by serially connecting two flexible hook hinges. Each flexible hook hinge is formed by two coplanar circular flexible hinges in a penetration manner. Each of two adjacent movable blocks of four movable blocks is driven by a voice coil motor to move in a translation manner. The two-freedom-degree, large-travel and large-load micro-positioning platform has the advantages that the voice coil motors are used as drivers, and large-travel motion range and submicron-level resolution are provided; the movable platform and the base are connected through the flexible standing columns, and the radial rigidity of the positioning platform is quite large.

The invention discloses a differential magnetic suspension vibration isolator which comprises an upper annular E-shaped electromagnet (15), a lower annular E-shaped electromagnet (11), an upper coil winding (8), a lower coil winding (10), a displacement sensor (1), a connecting flange plate (3), an adjusting nut (4), a spring (6), a linear bearing (7) and an armature (9). The upper annular E-shaped electromagnet (15) and the lower annular E-shaped electromagnet (11) are fixed onto a shell (14) and a base (12) respectively, the upper coil winding (8) and the lower coil winding (10) are fixed onto the upper annular E-shaped electromagnet (15) and the lower annular E-shaped electromagnet (11) respectively, the displacement sensor (1) is fixed onto the shell (14) through a support (16), the connecting flange plate (3), the adjusting nut (4), the spring (6), the linear bearing (7) and the armature (9) are sequentially connected in series from top to bottom through connecting rods (5), the shell (14) is fixed onto the base (12), and a sleeve (13) is fixed into the shell and matched with a spiral groove in the inner wall of the shell to form a sealed cooling water channel. The differential magnetic suspension vibration isolator has the advantages of simple structure, small size, non-contact, long service life, rapid response and easiness in regulating electromagnetic force, and has an excellent application prospect in the field of active vibration noise control.

The invention relates to a friction type adjusting line delivery system which comprises rectilinear friction drive devices, an adjusting line upper element hoist, an adjusting line lower element hoist, trolley positioning devices and a trolley stopper, wherein the rectilinear friction drive devices are distributed along a friction track line body at intervals; the adjusting line upper element hoist and the adjusting line lower element hoist are respectively arranged at an outlet and an inlet of the line body and provided with track hoists; the trolley positioning devices are respectively distributed on lifting tracks of the hoists; and the trolley stopper is arranged on a friction track of the inlet of the adjusting line lower element hoist. The invention thoroughly changes a delivering way of a traditional car body adjusting line, has novel structure, high automation degree, simple control, low equipment and operation cost and convenient maintenance and is a delivery equipment system in a type of low noise, low pollution and environmental protection.

The invention relates to a servo bottle cap screwing mechanism in the technical field of packaging machinery, which comprises a cap screwing head, a waste cap withdrawing mechanism, an idler wheel mechanism, base blocks, a servomotor, a connecting support and a motor control system, wherein, the cap screwing head, the idler wheel mechanism, the servomotor and the connecting support are arranged on the base blocks, the motor control system controls the servomotor to rotate at certain rotating speed and torque, and the generated dynamic power is transferred to the cap screwing head by the idler wheel mechanism, so as to cause the cap screwing head to rotate along with the servomotor; the connecting support is connected with a lifting guide rod to drive the base blocks to raise and fall periodically, and the height of the waste cap withdrawing mechanism is unchanged, and the waste cap withdrawing mechanism is arranged at a cap screwing machine. Under the germfree condition, the entire bottle cap screwing mechanism is lubrication free, has no leakage, is convenient for frequent rinsing and disinfection; the cap screwing torque is controlled by computer, the cap screwing mechanism is driven by servomotor and has large adjustable range; and besides, the working torque, the cap screwing speed, and the like, of the single cap screwing mechanism can be displayed, and the cap screwing mechanism can automatically discharge waste or abnormal caps.

The invention provides a flexible back supporting device for a large-caliber reflector. The supporting device comprises the large-caliber reflector, a lens back plate, a supporting plate, a joint plate, a screw, flexible branch hinges, sliding flexible hinge supports, a flexible hinge connecting rod and a driving system. The three flexible branch hinges and the joint plate together form a combined hinge to constrain three degrees of horizontal moving freedom of the large-caliber reflector, the pitching and deflecting movements of the large-caliber reflector are achieved through flexible hinge blocks of the sliding flexible hinge supports and the driving system, when the driving system is tightly locked, the two degrees of rotating freedom of the large-caliber reflector are constrained, and the degree of the plane inner rotating freedom of the large-caliber reflector is constrained through the flexible hinge connecting rod. The flexible hinge structure is adopted as the supporting and positioning mechanism of the large-caliber reflector, nanoscale positioning precision is achieved, and the structural stability and the precision stability are ensured through matched design of the flexibility and the moving precision of the large-caliber reflector. The flexible back supporting device has the advantages of being simple in structure, stable in movement, free of friction or gaps, needless for lubrication and high in moving sensitivity.

The invention discloses a two-degree-of-freedom nanometer positioning platform. The nanometer positioning platform comprises a movable platform and a base which are connected with each other through a flexible branched chain in an x-axis direction and a flexible branched chain in an y-axis direction. As adopting a flexible parallel connection structure, the nanometer positioning platform has the advantages of high rigidity, high precision, low inertia, compact structure, no error accumulation and the like; and as adopting a flexible plate spring as a transmission component, the nanometer positioning platform has the advantages of no mechanical friction and no gap. Furthermore, based on the elastic deformation of materials, the tiny deformation generated by the flexible plate spring and a tiny working space at the tail end of an actuator, the nanometer positioning platform can effectively eliminate the defects of non-linearity and the like of a parallel connection mechanism; and two piezoelectric ceramic drivers are used for respectively driving the two flexible branched chains, so that a relative position of a template and a substrate in an imprint lithography process can be initiatively adjusted. The two-degree-of-freedom nanometer positioning platform provided by the invention can be taken as an auxiliary positioning platform of a nanometer imprint lithography positioning system, and can implement micro-scale feeding and precise positioning.

The invention discloses a three DOF micro-positioning workbench for a nano-imprint lithography system, which comprises six piezoelectric ceramic drives; and each drive is connected with a base, and the top end is connected with a spherical connector by thread. The workbench also comprises six flexible fork chains of a flexible mechanism with totally consistent structure and a moving platform which is supported by the flexible fork chains; and three position sensors are used to measure the actual output of the moving platform, and are respectively fixed between a rigid support and the moving platform. The micro-positioning workbench is characterized by high resolution and high dynamic response speed, can serves as an auxiliary positioning platform of a nano-imprint lithography positioning system, and realize micro feeding and precise positioning.

In an internal combustion engine comprising a mechanical charger in the form of a positive displacement compressor connected to the engine intake duct for supplying compressed air to the engine and a turbo-compound including an exhaust gas turbine connected to the engine exhaust duct for converting energy remaining in the exhaust gas to power, the exhaust gas turbine being connected to the engine via a reduction gear drive, the mechanical charger and the turbo-compound are coupled to the engine by a common belt drive including a first belt pulley mounted on the crankshaft of the engine, a second belt pulley mounted on the shaft of the reduction gear drive, and a third belt pulley mounted on the shaft of the mechanical charger.

The invention relates to an ultra-precise low-speed ball screw linear feeding device. A servomotor drives a ball screw to rotate for driving a screw nut to move, and the screw nut drives a worktable to slowly and stably move along a guide rail through a flexible hinge elastic mechanism. The flexible hinge elastic connection mechanism comprises a square rigid connection inner platform positioned inside and a frame-shaped rigid connection outer platform positioned outside; the rigid connection inner platform is connected with the rigid connection outer platform through flexible hinge units; and the flexible hinge units are arranged in a parallel combination form of straight-girder-shaped flexible hinges and symmetrically distributed. A screw nut seat is connected with the rigid connection inner platform, and the rigid connection outer platform is connected with the worktable. By adopting the flexible hinge elastic mechanism, the influence on the motion straightness of the worktable due to the bending of the ball screw can be effectively reduced, the ultra-low-speed stable linear motion is realized, and the requirements of machining optical parts by a diamond fly cutting machine tool are met.

The invention discloses an array typed laser scanner comprising a base, a control driving system and a plurality of auxiliary mirrors arranged in array. The auxiliary mirrors are arranged on the same direction and are fixed on the base; gaps are reserved between two adjacent auxiliary mirrors, so that the auxiliary mirrors do not touch each other when inclining to each other; the control driving system is connected with piezoelectric drivers in Ns of the auxiliary mirrors to realize open loop control of deflecting angles of reflectors. A multiple light ray scanning method is utilized to connect a plurality of small scanning fields into a big scanning field, and is capable of ensuring scanning angles and scanning frequency at the same time, each auxiliary is capable of scanning independently and multiple task detection is realized. With the array typed laser scanner, space utilization rate is greatly increased, and scanning angles are improved; the array typed laser scanner is characterized in that the array typed laser scanner is fast in driving speed, high in control accuracy, no mechanical abrasion, compact in structure, high in space utilization rate and good in stability, small in volume, light in weight, high in rigidity and is especially suitable for application of satellite and unmanned machine imaging laser radar.

The invention discloses a rolling massaging bed electrically changing the lying postures, and belongs to the field of massaging beds. The rolling massaging bed comprises a bed framework, a bed board, a back lifting device, a leg bending device, a front rolling massaging device and a back rolling massaging device. The bed board is of a curtain-shaped structure longitudinally bent. The front rolling massaging device and the back rolling massaging device are the same in structure and respectively comprise massaging wheels, a beam, a support, a base, a vertical lifting mechanism and a linear drive mechanism. The back lifting device comprises a back lifting support, a back lifting rotating shaft, traction ropes, sliding wheels and a back lifting pull rod. The leg bending device comprises a leg bending sliding support, leg bending sliding blocks, a guide rail support, leg bending guide rails and an electric push-and-pull mechanism. Compared with an existing nursing bed, the back lifting and leg bending functions are achieved through the simpler structure, and the manufacturing cost of the nursing bed is greatly reduced; a patient can be comprehensively massaged in a rolling mode, the lying postures of the patient are diversified, the rolling massaging bed is especially suitable for paralytics, and the labor intensity of medical workers and family members of the patient is relieved.

The invention discloses a micro clamp device with clamping and twisting functions. The micro clamp device comprises a base, fixed seats, a micro clamp, a displacement measurement plate, a capacitive sensor, a force measurement strain gauge and a piezoelectric ceramic driver, wherein the displacement measurement plate is adhered to the capacitive sensor; the capacitive sensor is arranged on one of the fixed seats; the force measurement strain gauge is arranged on the micro clamp; and the fixed seats, the micro clamp and the piezoelectric ceramic driver are arranged on the base. The micro clamp device adopts a flexible hinge and an asymmetric structure, has two degrees of freedom, completes clamping and rotary twisting operation of an optical fiber by cooperation of two clamp heads, and is richer and more flexible in function.

The invention relates to an integrated magnetic bearing control system and control method for a high-speed motor. The system comprises an upper computer and five control units; each control unit comprises a DSP controller, a signal isolation circuit, a power circuit (three-phase full bridge IPM), a signal conditioning unit and a sensor; the upper computer displays the displacement of a rotor in real time and can input given signals to the DSP controllers, when the rotor deviates from an equilibrium position, the displacement of the rotor deviating from the equilibrium position is detected through the sensors and converted into voltage signals, the voltage signals are fed back to the DSP controllers after passing by the signal conditioning units, and the DSP controllers output PWM control signals after algorithm operation and control power switch pipes in the power circuits to work to adjust the current value of a coil of an electromagnetic bearing to make the rotor stably suspended. Through the arrangement of each DSP controller and the corresponding three-phase full bridge IPM, not only the integration degree of the whole control system is high, but also the anti-interference capability of the magnetic bearing can be improved, and the service life of the bearing is prolonged.

A dieless wire drawing forming device comprises a wire pay-off drum, a wire take-up drum and a platform, wherein the wire pay-off drum is driven by a wire pay-off drum drive motor, the wire take-up drum is driven by a wire take-up drum drive motor, and the shafts of the wire pay-off drum drive motor and the wire take-up drum are respectively supported by the platform through shaft bases. The dieless wire drawing forming device is characterized in that a heater and a cooler are arranged between the wire pay-off drum and the wire take-up drum; the heater is supported on the platform through a bracket; the cooler is supported on the platform through a bracket; the distance S between the heater and the cooler is the width of a deformation region, which is determined by the performance of processed line material; the heater is a high-frequency or a middle-frequency electrical heater; and the cooler is a water cooler or an air cooler. The invention provides a dieless wire drawing processing method with high efficiency, no friction and no lubrication.