300 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.

A conical bearing includes a bearing sleeve, a bump foil, and a top foil. The bearing sleeve extends along an axis from a first open end to a second open end. The bearing sleeve has an axially tapered shape such that a first diameter of the bearing sleeve is greater than a second diameter of the bearing sleeve. An interior surface of the bearing sleeve has a non-circular profile. The bump foil is concentrically disposed within the bearing sleeve and includes bump foil pad segments extending circumferentially about the interior surface of the bearing sleeve. Each bump foil pad segment comprises a plurality of foil bumps and the plurality of foil bumps varies in stiffness along a circumference of the bump foil. The top foil is concentrically disposed within the bump foil and includes top foil pad segments extending circumferentially about an interior surface of the bump foil.

An assembly for rotational equipment includes a shaft, a first rolling-element bearing, a second rolling-element bearing, and a mid-shaft foil bearing. The shaft extends along a rotational axis between and to a first axial end and a second axial end. The shaft is configured for rotation about the rotational axis. The first rolling-element bearing is disposed at the first axial end. The second rolling-element bearing is disposed at the second axial end. The mid-shaft foil bearing is disposed axially between the first rolling-element bearing and the second rolling-element bearing.

The utility model relates to the technical field of X-ray tubes, and provides an elastic foil type liquid metal bearing suitable for an X-ray tube and a CT bulb tube. The bearing sleeve is rotatably arranged on the shaft body part in a sleeving manner and is indirectly matched with one end face of the thrust plate in a stopping manner; the sealing cover is provided with a central through hole, the sealing cover is arranged on the shaft body part in a clearance sleeving mode and connected to the open end of the bearing sleeve in a sealing mode, the sealing cover is indirectly matched with the other end face of the thrust plate in a stopping mode, and a shaft sealing clearance is formed between the inner circumferential wall of the sealing cover and the outer circumferential wall of the shaft body part; the bearing system comprises a radial foil bearing, a first thrust foil bearing and a second thrust foil bearing; wherein liquid film gaps exist between the bearing sleeve and the shaft body part and between the bearing sleeve and the thrust plate, liquid film gaps exist between the sealing cover and the thrust plate, and the liquid film gaps are used for being filled with liquid metal. According to the utility model, the high-speed rotation stability and the anti-vibration performance of the rotating anode assembly can be improved.

The invention provides a gas dynamic pressure bearing. The gas dynamic pressure bearing comprises a top foil, a fixed foil piece, a first supporting foil piece, a second supporting foil piece and a bearing sleeve, wherein the fixed foils are composed of fixed foil arc foils and fixed foil flat foils, the fixed foils distributed in the circumferential direction are fixed to the outer surface of the top foil through the flat foils, the first supporting foil and the second supporting foil are arranged in the space defined by the two adjacent fixed foil arc foils and the top foil, the second supporting foil is arranged in the first supporting foil, and the first supporting foil and the second supporting foil are arranged on the outer surface of the top foil. And the fixed foil and the first supporting foil jointly support the top foil, and the arc-shaped foil of the fixed foil is arranged in the arc-shaped groove of the bearing sleeve to limit the circumferential movement of all the foils. The arc-shaped foil of the fixed foil surrounds the supporting foil to jointly support the top foil, and the flat foil of the fixed foil is fixed on the outer surface of the top foil, so that the processing technology of the foil gas dynamic pressure bearing is simplified; meanwhile, the multi-layer structure can provide good rigidity and damping characteristics for the bearing.

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.

The invention discloses a turbo compressor. The rotating shaft is rotatably mounted inside the cover body. A bearing rotatably supports the rotating shaft. The bearing housing is coupled to the housing and supports the bearing. The bearing comprises a radial bearing and a radial bearing safety device. The radial bearing is mounted on an inner circumferential surface of the bearing housing and has a gas foil bearing to support a radial load of the rotating shaft. The radial bearing safety device is arranged on the bearing cover body, and the radial moving distance of the rotating shaft is limited within the elastic deformation range of the radial bearing. According to the structure, the radial bearing can be prevented from being damaged.

The invention relates to a magnetic-gas hybrid bearing type centrifugal compressor. The magnetic-gas hybrid bearing type centrifugal compressor comprises a rotor, a stator, a machine shell, a first radial foil bearing, a second radial foil bearing, a first thrust foil bearing, a thrust plate, a second thrust foil bearing and a permanent magnet bearing. The permanent magnet bearing comprises an inner magnetic ring and an outer magnetic ring which are arranged at an interval, the inner magnetic ring is fixedly connected to the rotor, and the outer magnetic ring is fixedly connected to the casing. Therefore, in the starting and stopping process of the magnetic-gas hybrid bearing type centrifugal compressor, when the bearing capacity of the first thrust foil bearing or the bearing capacity provided by the second thrust foil bearing cannot counteract the axial acting force from the rotor, the axial acting force from the rotor can be counteracted by utilizing the suction force generated by the outer magnetic ring to the inner magnetic ring; the axial displacement of the rotor is reduced, the axial stability of the rotor is improved, the friction degree between the first thrust foil bearing and the thrust plate and between the second thrust foil bearing and the thrust plate is reduced, and the durability and performance of the first thrust foil bearing and the second thrust foil bearing are improved.

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.

To provide a foil bearing capable of suppressing uneven wear of a top foil caused by an inclination of a bump foil with respect to the top foil.SOLUTION: A bearing housing 12 has a groove 20 into which a locking portion 43 of a bump foil 14 is inserted. The groove 20 has a first opening 20a opened to a first end surface 12b of the bearing housing 12. First and second come-off prevention members 15, 16 are provided on both sides of the locking portion 43 in an axial direction X of the bearing housing 12. In the axial direction X of the bearing housing 12, a pair of bump edges 40a, 40b of a body 40 of the bump foil 14 is positioned in an inner side of a pair of top edges 30a, 30b of a cylinder 30 of a top foil 13 in the axial direction X of the bearing housing 12. The bump foil 14 has a first protrusion 44 protruding from the first bump edge 40a positioned on the first opening 20a side of the pair of the bump edges 40a, 40b.SELECTED DRAWING: Figure 3

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).

The invention discloses a rapid measuring device for the takeoff speed of a radial air foil bearing, comprising: a rotating shaft mounted on an output shaft of a motor; a bearing seat sleeve mounted on the rotating shaft; a radial air foil bearing mounted in the bearing seat, and an inner hole of the radial air foil bearing is mounted in cooperation with the rotating shaft; a loading mechanism is connected to the bearing seat, and the loading mechanism applies a load to the radial air foil bearing through the bearing seat; a measuring mechanism comprises an indicator light and a power supply, and the two ends of a series circuit of the indicator light and the power supply are electrically connected to the bearing seat and the rotating shaft respectively. When the motor stops, under the action of the loading mechanism, the rotating shaft fits the radial air foil bearing to be measured, the measuring mechanism circuit is closed, and the indicator light is on. After the motor is started, the rotating shaft is separated from the radial air foil bearing, the measuring mechanism circuit is disconnected, the indicator light becomes dark, and the speed recorded at this moment is the takeoff speed of the radial air foil bearing to be measured under this working condition, which can avoid measuring friction torque, reduce the measurement difficulty, and achieve high-precision measurement.

The invention provides a laminated gas thrust foil bearing device with a cantilever structure. The laminated gas thrust foil bearing device comprises a bottom plate, a thick gasket is arranged on the bottom plate, a flat foil is arranged on the gasket, a thin gasket is arranged on the flat foil, and a top foil is arranged on the thin gasket. The device can be processed and produced without a mold, so that the production cost can be reduced. The top foil comprises a cantilever structure, the cross section of a cantilever is variable, the upper surface of the cantilever is inclined, an initial convergence gap can be formed, and the cantilever can further deform under the dynamic pressure effect to form elastic support. The length and the number of the cantilever structures can be changed, and the rigidity and the bearing capacity of the whole bearing can be adjusted through different parameter combinations so as to meet special requirements under different working conditions.

The present invention discloses an elastic foil gas bearing with adjustable support stiffness and a transmission device. The bearing is used to be sleeved on a matching journal, and includes an elastic foil gas bearing body, a rotating bearing sleeve, a fixed bearing sleeve and a driving device; the elastic foil gas bearing body includes a bottom arch foil and a top foil. The top foil is arc-shaped and is sleeved on the journal. The bottom arch foil is correspondingly supported outside the top foil; the bottom arch foil is externally sleeved with a rotating bearing sleeve and a fixed bearing sleeve arranged axially. The bottom arch foil is fixedly connected to the rotating bearing sleeve and the fixed bearing sleeve respectively. The connection points of the bottom arch foil with the rotating bearing sleeve and the connection points of the bottom arch foil with the fixed bearing sleeve are axially staggered; the driving device drives the rotating bearing sleeve to rotate, so as to compress or stretch the waveform arch of the bottom arch foil. The present invention can improve the stability of the bearing rotor system by changing the stiffness of the elastic gas foil bearing in real time.

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 present invention provides a turbo fluid machine. The thrust foil bearing (30) includes: a wave foil (32) formed of an elastic thin plate having a corrugated shape; and a top foil (33) formed of an elastic thin plate having a bearing surface (33c) facing the bearing surface (241d) of the thrust ring (the third support portion 24d) and elastically supported by the wave foil (32). The wave foil (32) is divided in the radial direction, and the ridge line (321e) of the peak portion of the outer peripheral side foil (321) extends obliquely in such a manner that it advances in the other direction around the axis as it advances from the inner peripheral edge (321a) of the outer peripheral side foil (321) toward the outer peripheral side. The ridge line (322e) of the peak portion of the inner peripheral side foil (322) extends obliquely in such a manner that it advances in the other direction around the axis as it advances from the outer peripheral edge (322a) of the inner peripheral side foil (322) toward the inner peripheral side.

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.

According to the invention, an axial foil bearing (1) is designed, in which a plurality of foils (2, 3) are oriented and oriented by means of bendable webs (7) and can finally be held together also by said webs.

The present disclosure relates to a hydrodynamic gas foil bearing, a compressor, an air conditioner, and an automobile. The hydrodynamic gas foil bearing includes: a bearing housing; a top foil; and a support wave foil located between the bearing housing and the top foil. Wherein, the bearing housing is formed with rigid support bosses on both sides of the support wave foil, which are configured to limit the top foil in the direction of pressing the support wave foil. The rigid support bosses are made of a temperature-sensitive material that expands and contracts due to heat. By controlling the height difference between the support wave foil and the rigid support bosses, the included angle slope of the top foil is correspondingly adjusted. The height of the rigid support bosses changes with the temperature, which is beneficial to the formation of the hydrodynamic bearing gas film and the takeoff of the rotor when the rotating machinery is at the initial starting speed; it has high load-carrying capacity at high rotational speeds, thereby broadening the operating range of the bearing and enhancing its ability to face complex, harsh, and high-load conditions.

A radial foil bearing surrounds a rotation axis and supports the rotation axis. The radial foil bearing includes a bearing housing, an insertion hole which is formed in the bearing housing and through which the rotation axis is inserted, a groove provided in the inner peripheral surface of the insertion hole, a through hole having an opening formed in the groove and extending to the outer peripheral surface of the bearing housing, a restricting pin that is inserted into the through hole and extends into the groove, and a top foil located in the insertion hole. The groove is formed so as to reach an axial end surface of the bearing housing. The top foil has a circumferential end part located in the groove, and the restricting pin intersects or contacts with the inner side surface of the groove at multiple locations.

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 turbo fluid machine includes a rotating member having a bearing-contact surface; an operating part configured to rotate together with the rotating member to compress and discharge a fluid; a housing accommodating the rotating member and the operating part; and a foil bearing having a bearing surface that faces the bearing-contact surface and supporting the rotating member such that the rotating member is rotatable relative to the housing. At least one of the bearing-contact surface or the bearing surface has thereon a coating layer. The coating layer comprises polyamide-imide serving as a binder resin and molybdenum disulfide serving as a solid lubricant. A mass ratio of molybdenum disulfide to polyamide-imide is 0.42 or more.

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.