176 results about "Foil bearing" patented technology

A bearing system includes a housing having an inner surface defining a bore and a slot, and a foil bearing assembly positioned within the bore. The foil bearing assembly includes an outer foil assembly, a bump foil assembly, and an inner foil assembly. The outer foil assembly includes an outer foil extending from a first outer foil end to a second outer foil end, and a first anti-rotation tab at the first outer foil end that is received by the slot to limit circumferential movement of the outer foil in a first direction. The inner foil assembly is secured to the outer foil and includes an inner foil extending from a first inner foil end to a second inner foil end, and a second anti-rotation tab at the second inner foil end that is received by the slot to limit circumferential movement of the inner foil in a second direction.

The invention provides a predictive maintenance method and system for an air suspension fan based on digital twinning, and the method comprises the steps: collecting an air flow abrupt change characteristic when high-temperature dust-containing waste gas flows into the air suspension fan, transmitting the air flow abrupt change characteristic to a digital twinning system, and determining the air flow abrupt change characteristic; extracting a local clearance reduction trend of the foil and the bearing from the non-uniform expansion amount of the foil, and calculating space distribution after clearance reduction to obtain a target gas film thickness value; the target gas film thickness value is compared with a preset collision and abrasion threshold value, and if the target gas film thickness value is smaller than the threshold value, the collision and abrasion risk probability is evaluated through a Monte Carlo method; if the collision and abrasion risk probability exceeds a preset safety range, calculating a gas film rigidity fluctuation range based on a gas dynamics theory; and extracting a vibration amplitude analysis result from the dynamic response parameters of the foil bearing of the air suspension fan, and calculating a stability prediction index.

The invention discloses a strong-combination wide-temperature-range wear-resistant composite coating, and relates to the technical field of solid lubricating materials, the composite coating comprises a transition layer, a functional inner layer, a diffusion barrier layer and a functional outer layer which are sequentially formed on the surface of a matrix, the transition layer is a Mo layer and a Mo2N layer, the functional inner layer is a MoAgN layer, the diffusion barrier layer is a Mo2N layer, the functional outer layer is a MoAgN layer, and the functional inner layer is a MoAgN layer. The functional outer layer is a MoAgN layer, and the MoAgN layer comprises a Mo2N phase and an Ag phase. The invention further discloses a preparation method of the composite coating and application of the composite coating in the field of solid lubrication protection. The composite coating is good in film-substrate binding force and low in friction coefficient and wear rate in a wide temperature range, damage to key mechanical parts in the air foil bearing caused by high-temperature lubrication failure can be avoided, and the tribological performance of the bearing parts under the working condition of the wide temperature range is improved.

The invention discloses a testing device, which comprises a platform, a supporting seat, a pressure applying rotating shaft and a driving part, and is characterized in that the platform is provided with a fixing part, and the fixing part is used for fixing an axial air foil bearing; the supporting seat is located above the platform and installed on the platform, a shaft hole is formed in the supporting seat, and the shaft hole is located over the fixing part and penetrates through the supporting seat in the vertical direction; the pressing rotating shaft is movably arranged in the shaft hole in a penetrating mode in the vertical direction, and the bottom of the pressing rotating shaft is used for being attached to the axial air foil bearing in a normal state; the driving part is in driving connection with the pressure-applying rotating shaft to drive the pressure-applying rotating shaft to rotate. According to the testing device, the axial air foil bearing can be rapidly tested, and the production requirement of large-scale mass production is met.

A foil bearing includes a bearing housing having a through hole through which a rotation shaft is inserted, a thin-plate-shaped top foil, and a thin-plated-shaped bump foil. The top foil includes a tubular top foil body and trailing and leading edge tabs. The trailing and leading edge tabs are inserted in a slot of the bearing housing. The slot is defined by a slot wall including a leading wall located at a leading side in a rotational direction of the rotation shaft. The trailing edge tab extends in the slot at a radial outer side of the leading edge tab and includes a distal portion configured to contact the leading wall at least when the rotation shaft is rotating. The leading edge tab is separated from the leading wall and the trailing edge tab in a circumferential direction of the rotation shaft at least when the rotation shaft is rotating.

The invention relates to the technical field of gas plectrum bearing test appliances, in particular to a technical platform of a gas plectrum bearing test rotor system. The device comprises a basic platform, a balance tire, a turbine shaft, a heat insulation cover, a shaft turbine end positioning accessory, a bearing sleeve set assembly, a shaft pressure end part assembly and an air cylinder. The balance tire is fixedly arranged on the basic platform, and an air inlet is formed below the balance tire; the turbine shaft is installed on the balance tire in an interference fit mode, and the turbine shaft is sequentially sleeved with the heat insulation cover, the shaft turbine end positioning accessory and the bearing sleeve set assembly. The bearing sleeve group is connected with the shaft pressure end part assembly through a pin; an air cylinder is assembled at the rear end of the bearing end part assembly; and a dynamic pressure gas thrust bearing for testing is arranged on the axial pressure end part assembly. According to the technical scheme, the problems of low maximum rotating speed, poor stability and the like of a gas foil bearing technical test platform in the prior art are solved.

Systems, apparatus, articles of manufacture, and methods are disclosed that include an air foil bearing, the air foil bearing comprising: a thrust disc coupled to a rotor shaft, the thrust disc and rotor shaft to rotate; a thrust pad aligned with a first side of the thrust disc, the thrust pad to engage with the thrust disc as the thrust disc rotates; and a micro lattice structure between the thrust disc and the thrust pad, the micro lattice structure to mitigate the thrust pad engaging with the thrust disc.

The invention discloses a magnetic suspension and air suspension hybrid bearing system and a rotor structure and a control method thereof, and relates to the technical field of fans, and the system comprises a permanent magnet biased rotor structure, a stator core, a magnet exciting coil and an air dynamic pressure foil bearing assembly. The foil of the bearing assembly is made of a magnetic conductive material, so that the foil and the magnet exciting coil share the same radial air gap, and the air gap serves as a magnetic field channel and a dynamic pressure air film space at the same time. According to the operation control method, based on a rotating speed signal, magnetic suspension bearing is achieved through the magnet exciting coil in the starting and low-speed stages, and gas film complete bearing is switched in the high-speed stage. Through structure fusion and time-sharing control, the problem of magnetic circuit shielding is solved, the advantages of magnetic suspension friction-free starting and stopping and high speed and high efficiency of an air floating bearing are integrated, the state monitoring function is achieved, the system is compact and reliable, and the cost is optimized.

A centrifugal compressor (10, 50) for a fuel cell system, comprising: a compressor housing (11, 51, 105), a compressor shaft (12), and a bearing arrangement comprising an axial foil bearing (15), wherein the compressor shaft (12) is axially mounted in the compressor housing (11, 51, 105) via the axial foil bearing (15), wherein the compressor housing (11, 51, 105) comprises at least one integrally formed first cooling channel (25, 53, 102) and wherein the axial foil bearing (15) comprises a bearing disk (17, 52, 108) having at least one integrally formed second cooling channel (28, 54, 103, 104) for supplying cooling air for the axial foil bearing (15), wherein the first cooling channel (25, 53, 102) is in fluidic contact with the second cooling channel (28, 54, 103, 104) such that cooling air flows from the first cooling channel (25, 53, 102) to the second cooling channel (28, 54, 103, 104).

This method for determining deterioration in a foil bearing that supports a rotor shaft of an electric compressor device comprises: a torque under determination acquisition step for acquiring a torque under determination, which is the torque of the rotor shaft at a startup time or a stopping time; a torque determination step for determining whether the torque under determination is less than or equal to a torque threshold value; and a deterioration determination step for determining that the foil bearing has deteriorated when it has been determined that the torque under determination is less than or equal to the torque threshold value.

The invention relates to an axial fluid bearing point (24) with two axial foil bearing arrangements, each comprising at least one bearing foil (26), which are radially assigned within a housing circumferential surface of a receiving space to two axially opposite housing end faces of two housing bodies. To optimize the axial fluid bearing point (24), the axial foil bearing arrangements are held at an axial distance from each other by means of at least one guide and / or retaining geometry provided on a cover foil of the respective axial foil bearing arrangement.

The invention relates to an axial fluid bearing part (24) having two axial foil bearing assemblies, each having at least one bearing foil (26), which are assigned to two axially opposite housing end faces of two housing bodies radially in a housing circumferential surface of a receiving space. In order to optimize the axial fluid bearing portion (24), the axial foil bearing assemblies are each held at an axial distance from one another by means of at least one guide and / or holding geometry provided on the cover foil of the respective axial foil bearing assembly.

This invention belongs to the field of air bearing technology and discloses a tilting pad air foil bearing with coordinated control of PZT and a bridge amplification mechanism. It includes a top foil, a corrugated foil sleeved outside the top foil, a bushing sleeve sleeved outside the corrugated foil, a through groove on the bushing, a PZT placed within the through groove, a bridge amplification mechanism connected to the PZT, and the bridge amplification mechanism connected to the tilting pad via a flexible hinge. The tilting pad contacts the corrugated foil, the PZT is connected to a power supply device, and the power supply device is connected to a controller. The advantages of this invention include oil-free lubrication, low friction loss, high rotational speed, adjustable bearing clearance, and adjustable bearing stiffness.

A radial foil bearing (5) comprises a housing (10) that has an insertion hole (11) for a shaft (2), and a top foil (20) that is provided inside the insertion hole (11). On the inner surface (11a) of the insertion hole (11), a groove section (12) that extends in the axial direction of the insertion hole (11) is provided. The top foil (20) is provided with a body section (21) that functions as a bearing surface for the shaft (2), and a first end section (22) and a second end section (23) that are positioned respectively on the forward side and the backward side of the body section (21) in the rotation direction of the shaft (2). The second end section (23) has a hook shape, and a portion thereof is accommodated in the groove section (12).

The invention discloses a gas foil bearing wear high-fidelity modeling method based on a physical neural network, and relates to the technical field of rotor dynamics and fault diagnosis. The method comprises the following steps: firstly, constructing physical models of gas foil bearing wear, wherein the physical models comprise a gas foil bearing structure and lubrication mechanism model and a gas bearing rotor system nonlinear dynamic model; and then building a hybrid modeling framework fusing a physical mechanism and data driving, training a model mismatch item by adopting a neural network, representing an unknown parameter by adopting a Sigmoid function, introducing a displacement compensation factor, and finishing model parameter updating by combining forward calculation and reverse calculation. According to the method, high-fidelity modeling of wear evolution and key parameter collaborative identification can be realized, the model adaptability and the data matching precision under complex working conditions are improved, and technical support is provided for a gas bearing digital twin system and predictive maintenance.

An assembly is provided for a turbine engine. This assembly includes a stationary structure, a rotating structure, a magnetic-foil bearing and a cooling system. The rotating structure is rotatable about an axis. The magnetic-foil bearing radially supports the rotating structure within the stationary structure. The magnetic-foil bearing includes a magnetic bearing stator, a magnetic bearing rotor and a foil bearing. The foil bearing is disposed radially between the magnetic bearing stator and the magnetic bearing rotor. The cooling system includes a cooling circuit configured to deliver cooling air to at least a first bearing component. The first bearing component is configured as or otherwise includes one of the magnetic bearing stator, the magnetic bearing rotor and the foil bearing.

The application discloses a welding method for a gas supply pipe and a circular-arc top foil of a dynamic-static pressure hybrid radial gas foil bearing, and solves the problem of coating peeling caused by the welding protrusion of the welding spot of the gas supply pipe and the top foil, which leads to the wear of the rotor and the bearing. The gas supply steel pipe and the dynamic-static pressure hybrid radial gas foil bearing are tightly attached after being aligned at the gas supply hole of the top foil, the circular pipe opening of the gas supply pipe is overlapped with the gas supply hole of the top foil, laser welding is performed on the inner surface of the circular-arc top foil, the welding position is at the contact position of the top foil and the pipe opening of the gas supply pipe, secondary welding is performed on the outer surface of the top foil, the welding position is at the contact position of the pipe opening of the gas supply pipe and the top foil, the welding wire is wound, and laser melting is performed on the welding wire to improve the welding strength and the sealing performance, ensure the firm welding of the gas supply pipe and the top foil, prevent the gas from leaking through the gap, solve the problem of the welding protrusion of the welding spot on the inner surface of the top foil after the previous welding, improve the processing quality, and reduce the wear of the bearing and the rotor.

A component of a gas foil bearing, having a plurality of material layers forming a composition gradient that defines a first coefficient of thermal expansion (CTE) and a second CTE that differs from the first CTE, wherein: the plurality of material layers include at least two dissimilar metals, plastics, or fiber filled metals or plastics, that are layered on top of each other; when the component is subject to heating, the component changes from a first shape to a second shape; and the component is a bearing sleeve.

To stably support a rotary shaft in the radial direction by a foil bearing.SOLUTION: At least when the rotating shaft 12 is rotating, the leading end of the trailing edge tab 37 is in contact with the leading wall 32. Accordingly, it is possible to prevent a portion of the top foil main body 36 on the trailing edge tab 37 side from being dragged toward the rotary shaft 12 due to the flow of air between the top foil 27 and the rotary shaft 12 caused by the rotation of the rotary shaft 12. The leading edge tab 38 is separated from each of the preceding wall 32 and the trailing edge tab 37 in the circumferential direction of the rotary shaft 12 at least when the rotary shaft 12 is rotating. Therefore, since the movement of the leading edge tab 38 is prevented from being hindered, a portion of the top foil main body 36 on the leading edge tab 38 side is easily deformed so as to be bent in a direction away from the rotary shaft 12.SELECTED DRAWING: Figure 5

The invention discloses a permanent magnet gas thrust foil bearing mechanism with high heat dissipation rate, belongs to the field of magnetic gas hybrid bearings, and aims to solve the problems of poor bearing capacity, poor heat dissipation performance and short service life of an existing thrust foil bearing. The supercritical CO2 heat dissipation device comprises a permanent magnet thrust disc unit, a thrust foil bearing, a supercritical CO2 heat dissipation module and a permanent magnet bearing seat unit, the permanent magnet thrust disc unit and the permanent magnet bearing seat unit are arranged on the two sides of the thrust foil bearing correspondingly, and the axes of the permanent magnet thrust disc unit, the thrust foil bearing and the permanent magnet bearing seat unit are collinear; a supercritical CO2 heat dissipation module is arranged on the side, facing the thrust foil bearing, of the permanent magnet bearing seat unit, the thrust foil bearing, the supercritical CO2 heat dissipation module and the permanent magnet bearing seat unit are detachably connected through pins, and the thrust foil bearing mechanism is mainly used in high-speed rotating machinery.

The invention relates to an axial fluid bearing point (24) with two axial foil bearing arrangements, each comprising at least one bearing foil, which are radially assigned within a housing circumferential surface of a receiving space to two axially opposite housing end faces of two housing bodies. To optimize the axial fluid bearing point (24), the axial foil bearing arrangements are held in a rotationally secure manner at an axial distance from each other by means of at least one guide and / or holding geometry, which is combined with an anti-rotation device.

The invention relates to a bearing system for a drive turbine of a rotary atomizer (1), having a rotatable turbine shaft (3) for receiving a bell cup (2) for spraying a coating material, radial bearings (13-15) for rotatably supporting the turbine shaft (3), which radial bearings comprise at least one foil bearing (12) or a spiral groove bearing.

A journal foil bearing system (105) includes a journal housing member (160) including a journal housing wall (161) that is disposed about a bore that extends along an axis. The journal housing wall (161) has an inner diameter surface (192) that faces the bore. The journal housing wall locally along the inner diameter surface has a first relief region (193). A shaft (115) is disposed within the bore and is supported for rotation. A biasing foil member (202) includes at least one biasing foil (202) received within the bore and disposed radially between the journal housing member and the shaft. A top foil member (211) includes at least one top foil (211) disposed within the bore radially between the at least one biasing foil (202) and the shaft (115). The biasing foil (202) is disposed circumferentially along the inner diameter surface (192) and the first relief region (193).

Each foil (12) of the radial foil bearing (10) has a top foil portion (12a) having a bearing surface (S) facing a rotating member (6), and a bottom foil portion (12c) provided to the top foil portion (12a) and overlapping a side opposite to the bearing surface (S) of the top foil portion (12a) of an adjacent foil. The bottom foil portion (12c) has a plurality of opening portions (13a).

Impeller bearings for pumps are disclosed. An example fluid pump includes a motor, a shaft coupled to a rotor of the motor, an impeller coupled to the shaft forward of the motor, the impeller including expeller vanes, a first radial bearing positioned around the shaft aft of the motor, wherein the first radial bearing is a first foil bearing through which fluid flows in a first direction, and a second radial bearing positioned around the impeller, wherein the second radial bearing is a second foil bearing through which fluid flows in the first direction.

The application provides a radial gas dynamic pressure bearing and a motor, and the radial gas dynamic pressure bearing comprises a top foil and a first layer wave foil, the top foil comprises a top foil bearing section, the first layer wave foil comprises a first layer wave foil flat section, a first layer wave foil support section one and a first layer wave foil support section two, the radial outer ends of the first layer wave foil support section one and the first layer wave foil support section two are fixed, the radial inner ends of the two protrude towards the top foil bearing section to be connected with the top foil bearing section and support the top foil bearing section, and the radial inner end of the first layer wave foil support section one and the radial inner end of the first layer wave foil support section two protrude towards each other and are spaced by a preset distance greater than 0. According to the application, a double wave peak structure is formed, the deformation of the flat foil between the two wave peaks of the wave foil and the contact area of the flat foil and the wave foil are increased, the stiffness of the wave peak position is homogenized, the wear is reduced, and the overall service life is improved.

To inhibit deterioration of performance caused by collapse of a shape of a top foil.SOLUTION: A radial foil bearing includes: a housing having a shaft hole for inserting a shaft; a top foil which is disposed in the shaft hole and formed by one thin plate disposed so as to enclose the shaft in a circumferential direction of the shaft hole; and a back foil which is disposed so as to enclose the top foil in the circumferential direction between an inner peripheral surface of the shaft hole and the top foil and has elastic support parts for elastically supporting the top foil in a radial direction of the shaft hole. The top foil has engagement pieces protruding to the outer side in the radial direction. The inner peripheral surface has engagement grooves capable of engaging with the engagement pieces. Both ends as seen in the circumferential direction of the top foil respectively have supported parts elastically supported by the elastic support parts.SELECTED DRAWING: Figure 2

According to some embodiments, a hybrid thrust foil bearing is provided. A thrust foil bearing or hybrid thrust foil bearing can comprise a disc-shaped backing plate and a bearing pad attached to the backing plate, the bearing pad having a taper portion and a flat portion, the taper portion extending from a leading edge of the bearing pad to a first angular distance and the flat portion extending from the first angular distance to a trailing edge at a second angular distance. Further, the bearing pad can comprise a bump foil coupled to the plate and a top foil disposed over the bump foil, a first edge of the top foil coupled to the backing plate at the leading edge. Additionally the bearing pad can comprise at least one orifice in the taper portion.

This invention belongs to the technical field of airborne electric compressors, and relates to a radial air foil bearing mounting structure for airborne electric compressors. It includes a motor housing, vibration-damping rubber rings, bearing sleeves, steel sleeves, sealing rings, metal gaskets, anti-loosening washers, elastic retaining rings, retaining pins, air intake nozzles, shafts, motor stators, motor rotors, impellers, interference pins, fastening screws, and anti-loosening washers. The grooves on the steel sleeve have an inverted trumpet-shaped structure, smaller on the outside and larger on the inside, ensuring free movement and rotation of the overlapping foils during operation to accommodate rotor misalignment. Simultaneously, the sealing ring between the steel sleeve and the bearing sleeve can be used for vibration damping in the airborne environment and to reduce misalignment installation errors between the front and rear radial bearings and the rotor, reducing the coaxiality requirements between components. The sealing ring is used for sealing the radial air bearings, and the actual clearance between the sealing ring and the rotor can be flexibly selected according to the cooling flow rate and the internal pressure requirements of the bearing.

Spacer ridge portions (51), which have higher rigidity than a bump foil (40) and serve as deformation restricting portions for restricting deformation of ridge portions (43), are provided in spaces between adjacent valley portions (44) in a circumferential direction of a rotating shaft (12). Each spacer ridge portion (51) protrudes toward each ridge portion (43) such that a gap (55) is formed between the spacer ridge portion (51) and the ridge portion (43) in a radial direction of the rotating shaft (12), and, when the rotating shaft (12) rotates, the ridge portion (43) deforms toward the spacer ridge portion (51) such that the gap (55) between the spacer ridge portion (51) and the ridge portion (43) is reduced. Even when the rotating shaft (12) moves in the radial direction due to vibration or the like and the rotating shaft (12) moves in such a manner that a top foil (30) crushes the ridge portions (43) of the bump foil (40), the deformation of the ridge portions (43) is restricted by the spacer ridge portions (51). As a result, complete crushing of the ridge portions (43) is avoided, thereby mitigating the decrease in fatigue strength of the bump foil (40).