979results 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 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.

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.

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.

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 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 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.

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.

The invention belongs to the technical field of permanent magnet biased hybrid magnetic bearings, and discloses a magnet biased partial load unstable hybrid magnetic bearing structure and a bearing capacity design method. A magnet bias partial load unstable hybrid magnetic bearing structure directly uses permanent magnets to carry out partial load on radial magnetic attraction force of a rotor, the radial bearing capacity of the bearing can be greatly improved by increasing the number of the permanent magnets, the permanent magnets are installed in an embedded mode, the structure is compact, and the stability of the rotor in the radial direction is maintained with the assistance of an electromagnetic bearing. The application requirements of large bearing and small size can be met; in order to solve the radial instability characteristic of a rotor caused by magnet bias partial load, the invention provides a bearing capacity design method under the influence of external force such as magnet bias permanent magnetic attraction, rotor gravity, external radial load and electromagnetic attraction of an electromagnetic bearing, and the method does not need to depend on finite element calculation with relatively long time consumption. The design range of the stable bearing capacity of the bearing can be obtained only through simple analytical calculation, stable suspension of the rotor is achieved, and good practicability and convenience are achieved.

The casing (10) of a support assembly for food applications has a housing portion (20) having a through-seat (25) within which a bearing unit is seated. The casing has a flange portion (30) for fixing the casing to a machine. The flange portion has a base surface (35) and at least two through-holes (32) for housing elements for fixing the casing to the machine. The casing has at least two metal bushings (40), equal in number to the number of through-holes, housed stably inside respective through-holes and coaxial with them. The casing has at least two spacers (50), equal in number to the number of through-holes, applied on the base surface of the flange portion opposite the respective through-holes. The casing has at least two inserts (60), equal in number to the number of spacers, and housed with interference inside the respective metal bushings and inside the respective spacers.

The invention provides a magnetic suspension axial bearing and a stator, an iron core, a compressor and a method thereof, the stator iron core comprises a first sub-block and a second sub-block, the first sub-block is provided with an iron core inner ring, the second sub-block is provided with an iron core outer ring, the iron core inner ring is used for being sleeved and fixed on the outer side of an insulation framework, and the insulation framework is sleeved and fixed on the outer side of the first sub-block. The annular winding groove, deviating from one side of the iron core inner ring, of the insulating framework extends in the circumferential direction of the iron core inner ring; wherein the second sub-block is used for being assembled on the first sub-block, so that the iron core outer ring is arranged on the outer side of the iron core inner ring in a sleeving manner, and an annular groove for accommodating the insulating framework is formed between the iron core outer ring and the iron core inner ring. According to the invention, the winding difficulty can be reduced.

The object of the invention is a method for the production of lithium complex soap lubricating greases or lithium-calcium complex soap lubricating greases and corresponding lubricating greases produced by this process and their use in slide and rolling bearings.

The application discloses a bidirectional hydraulic feedback type tension-torsion static pressure bearing mechanism, relates to the tension-torsion test technical field, and oil is supplied to two symmetrical static pressure oil cavities through a bidirectional hydraulic feedback type throttler; during work, oil flows to the liquid inlet of two liquid inlet guide columns, and part of oil from one liquid inlet guide column flows to the oil cavity through a liquid inlet throttling hole to form pressure oil, and the other part of oil flows to the oil cavity through a liquid outlet gap to release pressure; when the bearing rotating shaft approaches a certain static pressure oil cavity, the oil pressure of the corresponding oil cavity rises, the elastic diaphragm is pushed up to the other side to be elastically deformed, the distance between the elastic diaphragm and the other liquid inlet guide column is reduced, more oil flows to the liquid inlet throttling hole, the oil pressure of the other oil cavity is raised, the elastic diaphragm is reversely pushed back, and then the bearing rotating shaft is reversely pushed back, so that the bearing rotating shaft is in a balanced state, the deviation correction operation can be automatically completed, friction is reduced, the real modal response of the measured object can be truly reflected, and the service life is prolonged.

The invention relates to a valve device for installing on the outlet of a sanitary fitting, comprising a sleeve-shaped valve part (1) for securing to the outlet (13) of the sanitary fitting, said valve part comprising a blocking element (4) which is movably arranged in the interior of the valve part (1) and which can be moved from a closed position for an in-flowing liquid flow to an open position for conducting the liquid flow by means of a cam (10) that is secured to a shaft (3) of an actuation element (9), wherein the shaft (3) crosses the valve part (1) and is rotatably mounted on the valve part (1) by means of the actuation element (9). According to the invention, the valve part (1) has two diametrically opposed and axially running slots (8), and a sleeve part (2) is provided which comprises two diametrically opposed, radially protruding webs (7) that run in the axial direction of the sleeve part (1) and can be inserted into the slots (8) of the valve part (1) in a precisely fitting manner. The valve part (1) and the inserted sleeve part (2) leave open radial openings which form the rotary bearing of the shaft (3). In this manner, a mechanically simple device is facilitated for saving water.

The invention relates to the technical field of oil fume purification, in particular to a magnetic suspension bearing motor for an oil fume purification device and the oil fume purification device.The magnetic suspension bearing motor comprises a rotating shaft, a radial magnetic bearing unit, a radial sensor and a control system.The rotating shaft is used for being connected with an impeller of the oil fume purification device; the radial magnetic bearing unit comprises a radial rotor and a radial stator, the radial rotor sleeves the rotating shaft, the radial stator is located on the radial outer side of the radial rotor, and the radial stator comprises a first coil winding arranged in the circumferential direction of the radial stator; the radial sensor corresponds to the rotating shaft and is used for acquiring radial displacement of the rotating shaft and generating a radial displacement signal; the control system is electrically connected with the radial sensor and the first coil winding so as to adjust the current of the first coil winding according to the radial displacement signal, so that the electromagnetic acting force at any position between the radial stator and the radial rotor in the circumferential direction is changed, maintenance of dynamic balance of the motor is achieved, and normal operation of the motor is guaranteed.

The invention relates to a method for manufacturing a multi-layer plain bearing 1, comprising the following process steps: - providing a carrier body 2; - providing a bearing body 3; - applying the bearing body 3 to the carrier body 2, wherein a carrier body connection surface 5 is oriented towards a bearing body connection surface 6; - deforming the bearing body 3 by applying a magnetic force to the bearing body 3 by means of a magnetic force generator 16, wherein the bearing body 3 is pressed against the carrier body 2 by means of the magnetic force generator 16 and forms a force-fit and / or form-fit and / or material-fit connection with it.

To provide a support method and support mechanism for a roller enabling minute adjustment while greatly changing a natural frequency, and a web transport device using the same.SOLUTION: A support method for a roller of the present invention is a method for supporting a one-sided shaft of a roller at a first support position and at least one second support position in a direction toward an end of the shaft with respect to the first support position, the method comprising, when it is confirmed that the roller is resonating, changing a state of the shaft from supported to unsupported, or from unsupported to supported, at the second support position.SELECTED DRAWING: Figure 14

The application discloses a permanent magnet-electric permanent magnet composite water-lubricated bearing, which comprises a pressing plate, a bearing bush, a stator, a permanent magnet array and an electric permanent magnet array; the pressing plate is located inside the stator and at both ends of the permanent magnet array; the bearing bush is nested inside the stator, the permanent magnet array is arranged between the upper outer side of the bearing bush and the stator, and the electric permanent magnet array is arranged between the lower outer side of the bearing bush and the stator. The electric permanent magnet array is arranged in the lower area of the bearing bush, the magnetic force of the traditional permanent magnet water-lubricated bearing can be adjusted, and the magnetic force requirement of the bearing under different working conditions can be met. The magnetization or demagnetization state of the electric permanent magnet block in the axial direction of the electric permanent magnet array can be regulated, the uniformity of the axial force of the bearing can be adjusted, the magnetization or demagnetization state of the electric permanent magnet block in the circumferential direction of the electric permanent magnet array can be regulated, and the uniformity of the circumferential force of the bearing can be adjusted.