1209results about "Bearings" patented technology

The invention discloses an electromagnetically-supported hybrid magnetic thrust bearing structure and a suspension force design method, and provides a hybrid magnetic bearing structure design in which radial alternate magnetization is adopted in the axial direction, a permanent magnet bearing formed by stacking multiple layers of magnetic rings bears all axial thrust loads, and radial electromagnetic bearings are assisted at the two ends to maintain dynamic stability of a rotor. The performance requirements of high bearing capacity, low power consumption, good active control capability and high dynamic stability of the hybrid magnetic thrust bearing in a limited space are met; in order to solve the problems that an inner magnetic ring and an outer magnetic ring are not strictly centered due to the influence of machining precision, an assembly process, rotor eccentricity and the like during actual operation of a permanent magnet thrust bearing, additional unbalance load, dynamic unbalance load and the like are generated in the radial direction. The electromagnetic supporting suspension force design method comprehensively considers the radial unbalance load of the permanent magnet thrust bearing, the dynamic unbalance load of the rotor and the self-weight influence, effective calculation of the suspension force of the supporting rotor is achieved, and important technical support is provided for the hybrid magnetic thrust bearing structure and suspension force design iteration.

An insertion tool is provided. The tool includes a flexible section comprising a plurality of rigidizable links, an end effector actuator, and an end effector coupled to the flexible section. A flexible is shaft inserted through the flexible section, wherein torque is transferred from the end effector actuator to the distal end via the flexible shaft to cause a rotation of the end effector. A tool may include a tool-less disconnect interface between the end effector and the flexible shaft.

The invention relates to the technical field of bearings, and provides a hydrostatic bearing gas supply system which comprises a first gas supply subsystem and a second gas supply subsystem, the first gas supply subsystem comprises a first pipeline, a first check valve, a first reaction mechanism, a second reaction mechanism and a degassing structure, and the first reaction mechanism, the second reaction mechanism and the first pipeline are sequentially connected; a reactant is arranged in the first reaction mechanism, a catalyst is arranged in the second reaction mechanism, and the first check valve and the degassing structure are arranged on the first pipeline; the second gas supply subsystem is connected with the first pipeline; when the gas source is cut off, the reactant and the catalyst are subjected to chemical reaction in the second reaction mechanism to generate water vapor and oxygen, the degassing structure is used for consuming the oxygen and generating superheated steam, and the superheated steam enters the hydrostatic bearing. The air supply system for the hydrostatic bearing provides the pure water vapor working medium for the hydrostatic bearing, so that the normal operation of the hydrostatic bearing is ensured, and the hydrostatic bearing is prevented from being damaged.

An electromechanical joint provides rotational movement in at least two dimensions while conducting electrical power between orthogonal hubs. The joint, shaped as a cross, has four conical shafts positioned orthogonally and apart from each other within an interior of a housing. Apexes of the conical shafts face each other proximate a centroid of the housing. A conductive fluid, such as Galinstan, fills recesses between the conical shafts. Separate yokes attached to pairs of the hubs may impart forces on the shafts, causing the shafts to rotate within the conductive fluid around orthogonal axes. The conductive fluid provides simultaneous conduction of electrical power between the hubs. The yokes may be affixed respectively to a current collector and conductive arms of a work machine for improved movement and power conduction without the need for additional components.

The invention belongs to the technical field of mechanical transmission, and discloses a conductor ring and magnetic resistance array composite permanent magnet thrust bearing and a damping force calculation method. The conductor ring and magnetic resistance array combined type permanent magnet thrust bearing realizes the bearing of non-contact magnetic thrust through the combination of the eddy current ring and the magnetic group array. When thrust from a propeller at the stern end of a propulsion shafting acts, the rotor magnetic group array axially moves, axial traction force is generated between the rotor magnetic group array and the stator magnetic resistance array to counteract the thrust action from the axial direction, meanwhile, the magnetic group array cuts the vortex ring, induction damping is generated on the surface of the vortex ring, damping force is formed, and the vortex ring is driven to rotate. And therefore, the longitudinal vibration during transmission of the propulsion shafting is reduced, and the propulsion shafting system is more silent and stable during operation. In addition, the damping force calculation method does not need complex three-dimensional structure modeling and grid division, is simple in solution, high in universality and short in calculation time consumption, and has high engineering application practical value.

The invention discloses a magnetic adjustment water lubricated bearing and a bearing support control method, which are applied to a large ship propulsion shaft system, and comprise a bearing shell, an electromagnetic excitation module, a batten, a sensor module, a power supply driving module and a control system, a plurality of mounting grooves are formed in the bearing shell; an electromagnetic excitation module is arranged in each mounting groove and generates a variable magnetic field with set intensity; a plurality of magnetically soft alloy segments are arranged on the batten, the magnetically soft alloy segments correspond to the electromagnetic excitation modules one to one, and a magnetic field acts on the magnetically soft alloy segments to generate electromagnetic attraction force; the control system independently controls the excitation current of each electromagnetic excitation module according to data of the sensor module, and generates magnetic fields with different intensities to act on soft magnetic alloy areas at corresponding positions, so that precise control of local supporting rigidity and lubricating gaps of the water-lubricated bearing is realized, unbalance loading and abnormal wear risks are effectively reduced, and the service life of the water-lubricated bearing is prolonged. And the adaptive capacity of the bearing under low-speed heavy load and dynamic disturbance is improved.

A magnetic bearing system (100) includes a rotary shaft (101) and a magnetic bearing (105, 107, 130) having an electromagnet coil (106, 108, 108B, 135, 136). One end of the electromagnet coil (106, 108, 108B, 135, 136) is connected to the neutral point of a first multi-phase winding (113, 115, 123, 125, 173, 181) having at least three or more phases.

The invention relates to the technical field of bearings, and provides a hydrostatic bearing air supply system capable of improving transient bearing capacity, which comprises a first air supply subsystem and a second air supply subsystem, the first gas supply subsystem comprises a first pipeline, a first switch valve, a reaction mechanism and a degassing mechanism, reactants are arranged in the reaction mechanism, the reaction mechanism is communicated with the first end of the first pipeline, the second end of the first pipeline is used for being communicated with the hydrostatic bearing, and the first switch valve and the degassing mechanism are both arranged on the first pipeline; the degassing mechanism is positioned between the reaction mechanism and the first switch valve; the second air supply subsystem is used for communicating with the hydrostatic bearing through a first pipeline; the first switch valve is used for being opened under the condition that the hydrostatic bearing is impacted, so that water vapor in the hydrostatic bearing enters the reaction mechanism to be chemically reacted with reactants, and water vapor and oxygen are generated; the degassing mechanism is used for consuming oxygen and generating superheated steam. Normal operation of the hydrostatic bearing can be guaranteed, and the hydrostatic bearing is prevented from being damaged due to rotor collision.

The invention relates to a repeatedly detachable magnetic composite water lubricated bearing and a maintenance method thereof.The water lubricated bearing comprises a cylindrical bearing seat surrounding a ship stern shaft and a permanent magnet assembly detachably connected with the bearing seat, a cylindrical sliding bearing is arranged on the inner side of the bearing seat, a notch is formed in the outer side face of the sliding bearing, and the permanent magnet assembly is detachably connected with the bearing seat; the notch penetrates through the sliding bearing in the axis direction of the sliding bearing, a containing groove used for containing the permanent magnet assembly is defined between the notch and the inner side wall of the bearing seat, when the water lubrication bearing is arranged on the outer side of the ship tail shaft in a sleeving mode, the containing groove is located over the ship tail shaft, and the permanent magnet assembly is in sliding fit with the containing groove in the axis direction of the sliding bearing. According to the scheme, the permanent magnet is configured to be in a detachable form, and the permanent magnet can be conveniently maintained after being demagnetized, so that the maintenance cost of the water-lubricated bearing is reduced, and the load of the water-lubricated bearing can be reduced for a long time.

The invention discloses a compressor and a refrigerating system. The compressor comprises a machine shell, a motor and a pump body assembly. The shell is provided with an accommodating cavity; the motor is arranged in the containing cavity and comprises a rotor and a stator arranged on the periphery of the rotor in a sleeving mode. The pump body assembly is arranged in the containing cavity, the pump body assembly comprises a crankshaft, a static scroll plate, a movable scroll plate and a support, the crankshaft sequentially penetrates through the support, the movable scroll plate, the static scroll plate and the motor, the crankshaft comprises an eccentric section, and the movable scroll plate is arranged on the eccentric section in a sleeving mode; the outer diameter D of the stator and the outer diameter D1 of the eccentric section meet the relational expression that D / D1 is larger than or equal to 5 and smaller than or equal to 7. The problem that in the prior art, a crankshaft of a scroll compressor is low in reliability can be solved.

The invention relates to the technical field of bearings, and provides an anti-impact hydrostatic bearing air supply system which comprises a first air supply subsystem and a second air supply subsystem, the first air supply subsystem comprises a first pipeline, a first check valve and a reaction mechanism, the reaction mechanism is connected with the first pipeline, and the first check valve is arranged on the first pipeline; the second gas supply subsystem is connected with the first pipeline and is used for being connected with the hydrostatic bearing; the reaction mechanism can generate chemical reaction when the hydrostatic bearing bears strong external impact, and water vapor is generated and enters the hydrostatic bearing. According to the anti-impact air supply system for the hydrostatic bearing, when the hydrostatic bearing bears severe impact, chemical reaction occurs in the reaction mechanism, a large amount of high-temperature and high-pressure water vapor is generated, the water vapor pushes the first check valve to be opened so as to enter the hydrostatic bearing, the bearing capacity of the hydrostatic bearing is improved, and collision between the rotor and the hydrostatic bearing is avoided.

A bearing and flywheel system can include a first bearing portion having an opening of a first dimension there through and a central longitudinal axis, a second bearing portion having a second dimension, the second dimension being smaller than the first dimension, and a flywheel coupled to the second bearing portion. The bearing portions can include high-temperature superconductor(s) and / or magnets. The second bearing portion can be disposed at least partially within the opening through the first bearing portion. A gap can exist between an outer surface of the second bearing portion and an inner surface of the first bearing portion. The second bearing portion can be configured to rotate relative to the first bearing portion.

To have excellent surface workability, and to suppress the difference in workability between a surface and an inside, and processing quality and dimensional variations during mass production processing.SOLUTION: Silicon nitride sintered body has a silicon nitride crystal particle and a grain boundary phase, and when a width is D before the surface processing is performed, a relationship between an average particle diameter dA and an average aspect ratio rA of the silicon nitride crystal particles in a first region from the outermost surface to a depth of 0 to 0.01D, and an average particle diameter dB and an average aspect ratio rB of the silicon nitride crystal particles in a second region inside the first region, are satisfied the following formulas. 0.8≤dA / dB≤1.2, 0.8≤rA / rB≤1.2.SELECTED DRAWING: Figure 1

The invention belongs to the field of rotating machinery bearing engineering and magnetic circuit design, and discloses a bearing bush and magnetic circuit integrated structure with radial and axial composite vortex suppression slots. The partition magnetic conduction embedded blocks are embedded into the bearing bush body in an annular multi-sector array and are symmetrically arranged between the left end face and the right end face of the bearing bush body in the axial direction; the vortex suppression slits are arranged at equal intervals along the circumferential direction of the bearing bush body; the partition water paths are respectively arranged on the back sides of the partition magnetic guide embedded blocks; the compliant thin-wall area is a liquid film area arranged between the bearing bush body and the partitioned magnetic conduction insert block; the magnetic flux gathering windows are magnetic path areas with small magnetic resistance in the bearing bush body, and each partition magnetic conduction embedded block correspondingly forms one magnetic flux gathering window and is distributed in the bearing bush body on the back side of the partition magnetic conduction embedded block. The adjustable shielding sheet is parallel to the surface of the bearing bush body and arranged in the axial center area of the bearing bush body.

The invention discloses an air floatation spindle, machining equipment and an air floatation spindle control method, the air floatation spindle comprises a machine body, a shaft core assembly and air floatation bearing assemblies, the shaft core assembly is supported on the machine body through the air floatation bearing assemblies, the air floatation bearing assemblies comprise the first air floatation bearing assembly, the first air floatation bearing assembly comprises a bearing sleeve and a shaft core sleeve, the bearing sleeve is installed on the machine body, and the shaft core sleeve is installed on the machine body. The shaft core assembly is sleeved with the shaft core sleeve, the bearing sleeve and the shaft core sleeve are both made of memory metal, and in the first temperature interval, the inner circumferential face of the bearing sleeve and the outer circumferential face of the shaft core sleeve are cylindrical faces; and in the second temperature interval, the inner circumferential surface of the bearing sleeve and the outer circumferential surface of the shaft core sleeve are conical surfaces. The first air bearing assembly is made of memory metal, through the phase change characteristic of the memory metal, shape adjustment and rigidity self-adaption optimization of the bearing working surface and the shaft core are achieved, and the dynamic performance and the machining adaptability of the main shaft in the wide working condition range are remarkably improved; therefore, one main shaft can meet various machining working conditions such as scribing, drilling and grinding.

The invention discloses a half-open type thrust magnetic levitation bearing. The bearing comprises a first magnetic ring, a second magnetic ring and a third magnetic ring, wherein the first magnetic ring, the second magnetic ring and the third magnetic ring are arranged in annular and laminating manners so as to form an annular magnetic pole; the magnetic pole of each of the magnetic rings is different from that of the adjacent magnetic ring; a first winding and a second winding of the annular magnetic pole are wound according to a predetermined half-open way, the lower part of the middle magnetic pole is recessed inwards so as to generate a winding space which meets predetermined conditions; and the magnetic pole arranged at the upper end extends, and thus, a complete circle of magnetic pole is formed after splicing. Based on the bearing, continuity and consistency of magnetic field strength of the magnetic poles of the half-opened axial thrust bearing can be basically reserved, and the half-open type thrust magnetic levitation bearing can be applied to high-speed rotation machines; and moreover, a more flexible mounting way can be obtained, particularly to large-size rotation machines.

A method for manufacturing a ceramic ball material according to an embodiment, includes: a step of producing a ceramic green compact; a step of performing a plurality of times of a CIP process on the ceramic green compact to produce a CIP (cold isostatic pressing) green compact; and a step of sintering a CIP green compact produced by a final CIP process among the plurality of times of the CIP process to produce a ceramic sintered compact. In the step of producing the CIP green compact, after a former CIP process among the plurality of times of the CIP process is performed, an orientation of a CIP green compact produced by the former CIP process is changed, and a latter CIP process is performed.

The invention discloses a needle mounting device, and relates to the technical field of retainer needle mounting. A needle installing device comprises a reciprocating driving part, a belt rotating part connected to the reciprocating driving part, a pressing die connected to the belt rotating part and a matching die arranged opposite to the pressing die, the matching die is provided with a containing groove used for containing a retainer, and the matching die is further connected with a needle feeding machine communicated with the containing groove. The radial driving-in device can efficiently complete radial driving-in of the roller pins.

The invention discloses a composite material connecting rod structure, and relates to the technical field of composite material structure design and manufacturing, in particular to a light high-strength composite material connecting rod which comprises a composite material rod body, a flange connector, a flange clamp, an adjustable clamp and a tensile bolt set. The composite material rod body is made of fiber reinforced resin matrix composites through a winding or laying winding process, and reinforcing areas and transition oblique angles are arranged at the two ends of the composite material rod body. The adjustable clamp and the flange clamp are in interference fit with the end of the rod body through built-in inclination and surface texture, the flange connector is connected with the clamp through the tensile bolt set, and efficient transmission of tension and compression loads is achieved. Through the integrated combined structural design, the problems of stress concentration and interface failure caused by traditional glue joint or screw joint are solved, the bearing capacity, environmental adaptability and reliability of the connecting rod are remarkably improved, and the connecting rod is suitable for the high-load fields such as aerospace, high-speed rails and heavy machinery.

The invention discloses a flywheel energy storage device which comprises a flywheel with a rotating shaft, a magnetic bearing for supporting the rotating shaft, a vacuum cover, an integrated motor for bidirectionally converting electric energy and kinetic energy between the flywheel and electric equipment, and a control system which comprises a displacement sensor capable of monitoring the eccentricity of the flywheel in real time. The magnetic bearing comprises an electromagnetic bearing and / or a permanent magnet bearing, and the magnetic suspension controller adjusts electromagnetic force in the electromagnetic bearing through an algorithm so as to offset centrifugal force brought by eccentricity of the flywheel. The algorithm is a PID control algorithm. The electromagnetic bearing is a low-temperature superconducting magnetic bearing. The integrated motor is connected with the oil pump, and the oil pump can be started to drive the hydraulic motor to link the transmission and the permanent magnet generator for power generation. The eccentric amount of the flywheel is monitored in real time through the displacement sensor, the electromagnetic force of the electromagnetic bearing is dynamically adjusted, the influence of centrifugal force on the flywheel is counteracted, the phenomenon that vibration is intensified due to high-speed rotation is avoided, and stability and safety are improved.

The present invention relates to a system method system based in a IoT (Internet of Things) platform for monitoring solids treatment machinery in fertilizer, mineral, or chemical sectors, which allows obtain information about the machines state and performance remotely and automatically, and in real time. This invention combines a set of sensors that measures different parameters such as position, vibration or temperature of different machinery component; with a network that receives that information and stores it into a cloud database which and an app to check said information.

According to the vibration suppression and test method for the magnetic bearing, vibration suppression of the magnetic bearing is achieved through the steps of off-line frequency sweeping identification, on-line compensation signal generation, off-line calibration of compensation current gain Ka and the like. According to the method, while the suppression precision of the same-frequency vibration force of the magnetic suspension rotor is improved, the control precision is improved, the vibration force is reduced, and the system reliability is improved; moreover, the method is small in calculation amount, effectively improves the real-time performance of system control, and is very high in practicability and wide in applicability.

The invention discloses an automatic bearing clearance pre-tightening device for a high-speed rotating shaft, and belongs to the technical field of bearings, the automatic bearing clearance pre-tightening device comprises a base, a first bearing seat is fixedly mounted at the top of the base, a rotating shaft is arranged in the first bearing seat, and the rotating shaft is rotatably mounted in the first bearing seat through a shaft shoulder; a second bearing seat is arranged on one side of the first bearing seat in a contact mode, and the second bearing seat is installed at the top of the base in a sliding mode; the automatic compensation device further comprises an automatic compensation assembly, the automatic compensation assembly comprises a groove formed in the side, away from the shaft shoulder, of an inner cavity of the second bearing seat, and an end cover is installed in an inner cavity of the groove in a sliding mode; in the automatic pre-tightening process of the diagonal contact ball bearing, dynamic automatic compensation of the clearance can be correspondingly achieved through the belleville spring set according to the thermal expansion condition of the rotating shaft, it is guaranteed that the pre-tightening force is within a reasonable range, the pre-tightening force is prevented from being out of control, and the safety and reliability of system operation are improved.

The invention relates to a magnetic suspension bearing control system and method and refrigeration equipment, and the system comprises a magnetic suspension bearing control module which is used for controlling a magnetic suspension bearing; the battery management module is electrically connected with the magnetic suspension bearing control module; and the master control module is respectively connected with the magnetic suspension bearing control module and the battery management module and can control the battery management module to store electric energy when the voltage of the magnetic suspension bearing control module is excessive and supply power to the magnetic suspension bearing control module when the power supply of the magnetic suspension bearing control module is insufficient. According to the technical scheme of the magnetic suspension bearing control system, through cooperative work of the battery management module and the master control module, the stability, the energy-saving performance and the response speed of the system are enhanced, the service life of equipment is effectively prolonged, and the maintenance cost is reduced. The integrated solution provides a safer, more reliable and more economical operating environment for high-performance and high-precision mechanical equipment.

The invention discloses a control device of a magnetic suspension bearing driver, a magnetic suspension bearing and a control method of the magnetic suspension bearing driver, and the device comprises a control unit which outputs a first group of control signals to an auxiliary resonance unit; the auxiliary resonance unit is arranged on the input side of the bridge circuit and provides bus voltage for the input side of the bridge circuit under the control of the first group of control signals output by the control unit based on preset power supply voltage; the control unit is also used for outputting a second group of control signals to the bridge circuit; and the bridge circuit is used for realizing soft switching control under the control of the second group of control signals output by the control unit based on the bus voltage provided by the auxiliary resonance unit. According to the scheme, the auxiliary resonance circuit is additionally arranged in front of the bridge circuit, and the equivalent capacitor module is additionally arranged in the bridge circuit, so that the switching power amplifier in the bridge circuit realizes zero-voltage starting, the switching peak current can be reduced, the power loss is reduced, and the service life of the switching power amplifier is prolonged.

Disclosed is a bearing system (34, 72, 100) for a bicycle (1) comprising a bicycle frame (2), wherein the bearing system (34, 72, 100) forms a rotary joint of a wheel suspension and has at least one inner ring (36, 84, 102) and at least one outer ring (38, 76, 108) comprising a bearing element (40, 80, 82) arranged therebetween. According to the invention, the inner ring (36, 84, 102) forms a pre-assembled assembly together with the outer ring (38, 76, 108) and the bearing element (40, 80, 82). Also disclosed is a bicycle (1) comprising such a bearing system (34, 72, 100).

A composite drive shaft includes a web-based body defining a longitudinal axis. The web-based body has a first composite layup end section, a second composite layup end section that is opposite to the first composite layup end section, a first spiral composite element extending between the first composite end section and the second composite layup end section, and a second spiral composite element extending between the first composite end section and the second composite layup end section. The first spiral composite element and the second composite spiral element are embedded into the first composite layup end section, and the second composite layup end section. The first composite spiral element and the second composite spiral element are arranged in a bi-directional orientation relative to the longitudinal axis. The first spiral composite element and the second spiral composite element are arranged at pre-determined angles and possess a uni-directional fiber-reinforced polymer-matrix composite structure.

The invention discloses a silicon nitride ceramic formula and a preparation process of a bearing roller matched with the silicon nitride ceramic formula, belongs to the technical field of ceramic materials, and aims to solve the problem of rolling contact fatigue failure caused by insufficient fracture toughness and microscopic crack propagation of an existing silicon nitride bearing roller under high-speed and heavy-load working conditions. The core formula of the invention comprises an alpha-Si3N4 matrix, a composite rare earth additive, a nano TiC modifier and an MgO heat conduction enhancer. The fracture toughness and fatigue resistance of the material are remarkably improved through process nano powder ultrasonic pre-dispersion, closed nitrogen circulation spray granulation, two-step air pressure sintering and cryogenic-thermal tempering gradient stress treatment.

The invention belongs to the technical field of linear guide rails, and discloses a dynamically-adjustable air-floating linear guide rail and an adjusting method thereof.By arranging a plurality of dynamic adjusting units, the relative distance between an air-floating bearing and a moving platform deck is actively adjusted, and accurate control over the posture of the moving platform deck is achieved; the reference datum piece and the non-contact displacement sensor which are independently arranged outside the guide rail base body are combined, so that the independence and the high precision of the measurement datum are ensured; the closed-loop control system generates a control instruction according to the real-time measurement signal, and drives the dynamic adjustment unit to carry out dynamic compensation, so that the straightness error generated in the operation process of the moving platform deck is effectively corrected; therefore, the motion precision and the stability of the air-floating linear guide rail can be remarkably improved, the air-floating linear guide rail can meet the ultra-precision application requirements of submicron and even nanoscale, and the defect that a traditional air-floating guide rail is difficult to meet the increasingly stringent precision requirement in ultra-precision application is overcome.