79 results about "Fluid bearing" patented technology

A turbine engine is provided. The turbine engine defines a radial direction and includes: a rotor; a stator comprising a carrier; a seal assembly disposed between the rotor and the stator, the seal assembly comprising a first seal segment, the seal segment having a seal face configured to form a fluid bearing with the rotor; and a seal support assembly, the seal support assembly comprising a prestressed spring assembly extending from the seal segment for biasing the seal segment along the radial direction.

A turbine engine includes a rotor, a stator, and a seal assembly disposed between the rotor and the stator. The seal assembly includes seal segment. The seal segment includes a seal face that is configured to form a fluid bearing with the rotor. A lift channel extends within the seal segment from an opening on the seal face. The turbine engine further includes a spring assembly disposed within the lift channel. The spring assembly including a biasing element and a piston element coupled to the biasing element. The lift channel includes a lift volume portion extending is between the opening and the piston element. The piston element is movable within the lift channel based on a pressure within the fluid bearing to adjust a size of the lift volume portion.

A centrifugal turbomachine (1) according to one embodiment includes: a pair of impellers (2A, 2C) in which back surfaces (21) thereof face each other; a shaft (3) interposed between the impellers (2A, 2C); and a fluid bearing (7) that supports the shaft (3) in a non-contact state. The fluid bearing (7) includes a bearing pad (71) in which a plurality of pockets arranged in a circumferential direction are formed on an inner peripheral surface. The centrifugal turbomachine (1) further includes a seal component (8) interposed between the fluid bearing (7) and the high-pressure-side impeller (2A) of the impellers (2A, 2C). The seal component (8) forms a chamber with the bearing pad (71), and the bearing pad (71) is provided with at least one through-hole that penetrates the bearing pad (71) in the axial direction of the shaft (3).

A linear electric machine includes a shaft, a primary piston assembly operably coupled with the shaft, a stator assembly supporting the shaft and housing a load device, and a bearing assembly supporting an end of the shaft. The bearing assembly includes a bearing housing and a fluid bearing within the bearing housing. The bearing housing includes an opening for receiving the shaft therethrough. The linear electric machine also includes a secondary piston assembly formed integrally with the shaft and at least a portion of the bearing assembly for providing fluid to the bearing assembly.

The utility model belongs to the technical field of vacuum coating, and relates to a static seal magnetic coupling rotating device which comprises a sample frame, a rotation driving component for driving the sample frame to rotate and a transmission component for transmitting rotation power, the transmission assembly comprises a magnetic-permeable sleeve, a rotating shaft axially penetrating through the magnetic-permeable sleeve, a driven gear located outside the magnetic-permeable sleeve and a magnetic coupling transmitting torque of the driven gear to the rotating shaft, the sample holder is fixed to the lower end of the rotating shaft, the upper end and the lower end of the magnetic-permeable sleeve are sealed, and the rotation driving assembly drives the driven gear to rotate. According to the device, the rotation driving assembly drives the rotating shaft to rotate through the magnetic coupling, the magnetic permeable sleeve does not block magnetic force permeation, and therefore the magnetic coupling can complete torque transmission under the condition that the inside and the outside do not make direct contact. The magnetic permeable sleeve can separate the interior of the vacuum chamber from the atmosphere and is in a fixed state, so that a static sealing mode is adopted, and compared with a magnetic fluid bearing, the cost is lower, and the vacuum stability is higher.

A turbine engine is provided. The gas turbine engine defines a radial direction, and includes: a rotor; a stator comprising a carrier; a seal assembly disposed between the rotor and the stator, the seal assembly comprising a seal segment having a seal face forming a fluid bearing with the rotor; and a seal support assembly comprising a torsional spring extension extending from the carrier, from the seal segment, or both, to bias the seal segment along the radial direction.

An electric direct-drive motor for an underwater vehicle comprises a fully-encapsulated stator and a rotor. The fully-encapsulated stator may comprise a stator encapsulated in a thermally-conductive and electrically-isolative encapsulant. The encapsulant may be configured to align the rotor within the fully-encapsulated stator. The fully-encapsulated stator may have an internal surface to operate as a bearing surface for the rotor. A radial gap between the rotor and the internal surface may provide a fluid bearing between the rotor and stator. The internal surface of the fully-encapsulated stator operates as a bearing surface for the rotor and the radial gap provides a fluid bearing when operating in a flooded assembly. This allows the electric direct-drive motor to be directly exposed to seawater and the high external water pressure eliminating any need for a pressure compensated housing and dynamic seals and bearings.

A generator includes a housing that defines a housing region and a fluid passage that forms a portion of a fluid circuit and includes an outlet in fluid communication with the housing region, a pump configured to convey fluid along the fluid passage, a bearing disposed about the pump, an alternator having a stator and a rotor disposed within the housing region, and a hub configured to receive torque for rotation about an axis. The hub is coupled with the rotor, such that rotation of the hub about the axis drives rotation of the rotor about the axis, and is coupled with the pump, such that rotation of the hub about the axis operates the pump. The hub defines an interior volume and comprises a bearing carrier engaged with the bearing, such that the bearing supports and facilitates rotation of the bearing carrier relative to a portion of the pump.

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.

A turbine engine is provided. The gas turbine engine defines a radial direction and includes: a rotor; a stator comprising a carrier; a seal assembly disposed between the rotor and the stator, the seal assembly comprising a seal segment, the seal segment having a seal face configured to form a fluid bearing with the rotor; and a seal support assembly, the seal support assembly including a magnet assembly having a magnet coupled to the carrier or the seal segment for biasing the first seal segment along the radial direction.

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.

A turbomachine includes a housing, a rotating group that is housed within the housing, and a fluid bearing system with a thrust member. The turbomachine further includes a compressor stage configured to receive a fluid from an area within the housing. Also, the turbomachine includes a seal plate of the housing. The seal plate includes a first face and a second face. The first face has a flow surface that at least partly defines a fluid flow path toward the compressor wheel. The second face has a thrust member support surface configured to support the thrust member during rotation of the rotating group. The seal plate includes an aperture that fluidly connects the area to the fluid flow path.

The present invention discloses a fluid bearing device for a machine tool spindle, which relates to the field of spindle fluid bearings, and comprises a lower shell and an upper shell, wherein the lower shell is fixedly connected to the upper shell, and a lower inner shell is installed on the inner side of the lower shell. The present invention realizes automatic delivery and oil film formation of lubricating oil through rotational motion, and significantly improves the operating stability and lubrication efficiency of the bearing system. The coordinated control mechanism of the flow limiting groove and the drainage groove accurately controls the fluid flow and flow velocity, optimizes the load distribution, reduces eddy currents, vibrations and high-frequency vibrations, and ensures the optimal state of the oil film thickness, and enhances the load bearing capacity. In addition, the design also effectively manages the internal temperature of the bearing, prevents the negative impact of high temperature on the lubrication performance, and realizes uniform distribution of the lubricating oil, significantly improves the lubrication effect, prolongs the service life of the spindle, reduces wear, and provides a strong guarantee for the long-term stable operation of the bearing system.

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.

A high-precision machine tool with at least one linear drive and guide-bearing, having at least one linear motor, which has at least one magnet arranged on one of the machine components and at least one coil arranged on the other machine component and operatively connected to the at least one magnet, wherein the at least one magnet and the at least one coil are configured to exert an opposing attractive force and to perform an at least temporarily relative movement in relation to one another; at least one hydrostatic fluid bearing arranged on one of the two machine components and operatively connected to the other machine component, wherein the hydrostatic fluid bearing exerts a repulsive force opposite to the attractive force; and a first bearing gap, formed between the two machine components, the height of which is greater than 0 μm and less than or equal to 10 μm.

A fluid bearing (3) according to one embodiment includes a housing (4). The housing (4) includes: an inner peripheral surface (41) facing an outer peripheral surface of a rotating shaft; a plurality of recesses (5) formed in the inner peripheral surface (41) so as to be aligned in a circumferential direction; a plurality of supply passages (6), each opening in a radially outer side wall surface of each recess (5); and an orifice or a capillary restrictor provided in each of the supply passages (6). Each supply passage (6) is inclined in the opposite direction to the rotation direction of the rotating shaft and toward the inside in the radial direction of the rotating shaft. In the inner peripheral surface (41) of the housing (4), a plurality of holes (7) are provided in each of a pair of axial land portions (42) located on both sides of the recesses (5) in the axial direction of the rotating shaft. Each hole (7) is inclined in a direction away from a recessed region (44) between the pair of axial land portions (42) and toward the inside in the radial direction of the rotating shaft.

A seal assembly for a rotary machine, such as a turbine engine, may include one or more seal segments, each of the one or more seal segments comprising: a seal housing defining a seal chamber and one or more fluid supply orifices extending through the seal housing; and a seal body defining a sealing face and one or more fluid conduits extending through the seal body to the sealing face. The seal chamber may receive at least a portion of the seal body, and the seal body may be movable within the seal chamber along a radial axis of a rotor of the rotary engine. The fluid supply orifice may be in fluid communication with the fluid conduit, and the fluid conduit may be in fluid communication with a fluid bearing gap defined between the seal face and a rotor face of the rotor.

The invention discloses a fluid bearing device for a machine tool spindle, which belongs to the technical field of fluid bearings and comprises a hydrostatic bearing mechanism, a spindle body is arranged in the hydrostatic bearing mechanism, and the hydrostatic bearing mechanism comprises a first shell and a second shell. A sealing cavity formed by the first shell and the second shell is internally provided with a lining cylinder and a step-by-step oil inlet mechanism, the inner wall and the outer wall of the lining cylinder are each provided with a first spiral groove and a plurality of oil inlet holes, and one side of the outer wall of the second shell is provided with a pre-alignment mechanism. The number of the oil inlet holes is increased to make up the response delay of the throttler and the hydraulic pump, oil is supplemented to an oil cavity in time to maintain the oil film pressure, meanwhile, different load requirements can be met, the number of the oil inlet holes is reduced when the load is small, oil waste can be avoided, and energy consumption increase caused by too high oil film pressure can be avoided; and oil film stability and operation economy are both considered.

An apparatus and method for enhancing mass-transfer rate of reactive species. The apparatus includes an optically transparent stator, a rotor, a pressurized fluid bearing, and a microfluidic channel. The rotor includes a target. The pressurized fluid bearing acts on the target. The pressurized fluid bearing maintains a height of the microfluidic channel. The microfluidic channel is positioned between the optically transparent stator and a reactive surface of the target.

The present invention relates to the field of mechanical engineering lubrication technology, and specifically to a magnetic fluid sliding bearing that synergistically lubricates pressure mapping and non-planar textures, comprising a bushing, a journal, a permanent magnet, and a bearing seat, wherein the bushing is arranged on the bearing seat, and a mounting cavity is provided on the bearing seat corresponding to the center of the bushing bottom, a permanent magnet is provided in the mounting cavity, the journal is rotatably arranged in the bushing, a magnetic fluid is provided between the bushing and the journal, and the inner surface of the bushing is provided with a cylindrical surface texture composed of a plurality of inclined planes as the bottom surface. The present invention forms a synergistic lubrication effect by superimposing the micro-dynamic pressure effect generated by the surface texture and the wedge-shaped dynamic pressure effect generated by the inclined plane, thereby greatly optimizing the lubrication state of the magnetic fluid bearing; at the same time, the position of the surface texture is arranged based on the bearing oil film pressure distribution characteristics, and the diameter and depth of each surface texture are mapped in a positive correlation with the oil film pressure, effectively ensuring that each surface texture can maximize the lubrication performance and reliability of the bearing.

The method for manufacturing an optical fiber includes drawing a bare optical fiber from an optical fiber preform along a drawing path, and further includes, during the drawing step, moving a first fluid bearing from a first position to a second position, where the first position is positioned off the drawing path and the second position is positioned within the drawing path, such that moving the first fluid bearing to the second position changes the direction of at least a first segment of the drawing path.

The invention relates to the technical field of grading rings, in particular to a high-wind-load area self-adaptive wind-resistant grading ring which comprises a grading support body, a magnetofluid bearing, a connecting frame, a self-adaptive wind-resistant part, a protective shell, an intelligent control part, a support body fixing part and a wind speed sensor, the grading support body comprises a grading top ring, and a guide ring is arranged on one side of the grading top ring; the pressure equalizing bottom ring is arranged on one side of the guide ring, the magnetofluid bearing is arranged on the outer side of the guide ring, the connecting frame is arranged on the outer side of the magnetofluid bearing, the self-adaptive wind-resistant part is arranged on the outer side of the connecting frame, the protective shell is arranged on one side of the self-adaptive wind-resistant part, the intelligent control part is arranged in the protective shell, and the support body fixing part is arranged on the upper side of the pressure equalizing top ring. Low-friction rotation of the connecting frame is achieved through the liquid magnetic suspension technology, the self-adaptive wind-resistant part is linked with the magnetic fluid bearing through the connecting frame, wind load changes are responded, flexible rotation of the wind-resistant part is ensured, and the self-adaptive wind-resistant device is suitable for the high-wind-load environment.

The utility model provides a magnetic fluid bearing box secondary protection magnetic drive pump belongs to the technical field of magnetic drive pump, including the pump body, the one end fixed mounting of pump body has the pump cover, the back surface fixed connection of pump cover has the double -layer isolation bushing. The utility model discloses a pressure sealed cavity that double -layer isolation bushing, sealing bracket and magnetic fluid bearing box constitute, cooperate multistage monitoring system of first pressure transmitter and second pressure transmitter, realized secondary protection when magnetic drive pump leak: when the inner layer of double -layer isolation bushing leaks, and first pressure transmitter alarms, but equipment still can safe operation, realizes secondary protection through second pressure transmitter when complete failure, all contact medium's sealing bracket, outer magnetic rotor and magnetic fluid bearing box all adopt corrosion -resistant material, ensure long -term reliability, and the structure design is simple and efficient, and the water -cooling jacket of magnetic fluid bearing box equipment makes it have wide applicable temperature range, can adapt to various magnetic drive pump type.

A linear motor includes a shaft, a piston assembly operably coupled with the shaft, a stator assembly supporting the shaft and housing a load device, and a bearing assembly supporting an end of the shaft. The bearing assembly includes a bearing housing, a fluid bearing within the bearing housing, and a bearing support defining a support surface that engages the fluid bearing. The bearing housing includes an opening for receiving a shaft therethrough. Further, the support surface of the bearing support defines an arcuate profile to allow the fluid bearing to remain aligned with the shaft when the shaft is tilted during operation of the linear motor.

A turbine engine is provided. The gas turbine engine defines a radial direction and includes: a rotor; a stator comprising a carrier; a seal assembly disposed between the rotor and the stator, the seal assembly comprising a seal segment, the seal segment having a seal face configured to form a fluid bearing with the rotor; and a seal support assembly, the seal support assembly including a magnet assembly having a magnet coupled to the carrier or the seal segment for biasing the first seal segment along the radial direction.

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 at an axial distance from each other by means of at least one guide and / or retaining geometry.

A turbine engine includes a rotor, a stator having a carrier, and a seal assembly that is disposed between the rotor and the stator. The seal assembly includes a plurality of seal segments. The plurality of seal segments includes a seal segment having a seal face forming a fluid bearing with the rotor, a body, and an aft bearing extending from the body. The turbine engine further includes a roller assembly having one or more rolling elements coupled to one of the aft bearing or the carrier. The one or more rolling elements in rolling contact with the other of the aft bearing or the carrier.

The invention provides a controllable rotary lifting load platform device, which comprises a vacuum chamber, a lifting platform and a lifting platform, the load platform is located in the vacuum chamber; the outer supporting shaft penetrates through the mounting hole, and the outer supporting shaft is provided with a hollow cavity; the inner supporting shaft penetrates through the hollow cavity and is connected with the load platform; a magnetofluid bearing is arranged on the rack, the lower end of the outer supporting shaft is arranged on the upper end face of the magnetofluid bearing, the lower end of the inner supporting shaft is connected with a driving device through the magnetofluid bearing, the driving device drives the inner supporting shaft to rotate, and the rack is fixed to a guide rail capable of ascending and descending. According to the controllable rotary lifting load platform device, the requirement for stable lifting and rotating of the load platform in the vacuum environment can be met, the sealing performance of an equipment container is also guaranteed, and meanwhile the phenomenon that when lifting and rotating are achieved through a shaft sleeve, bending is caused to be stuck due to the fact that the bending moment is too large under asymmetric loads is avoided.

A fluid bearing arrangement (9) comprises a first member (10), a second member (20), a pressurized-fluid source connection (31) and a fluid distribution channel network (32) The second member is arranged movable relative to the first member in a predetermined motion direction (40). A first side (11) of the first member have protrusions (13) facing a first side (21) of the second member. A distance (d) between the protrusions and the first side of the second member is smaller than an average distance (D). The first side protrusions encircle a first side first and second area (15, 16). The fluid distribution channel network connects the pressurized-fluid source connection to a respective pocket (42) of the first side first and second areas by means of connection channels (38), comprising a respective flow restriction (34). A mean offset of the first side first and second areas, transverse to the predetermined motion direction.

In general, the subject matter described in this disclosure can be embodied in a fuel injector that includes an upper housing portion that defines an inlet passage adapted to receive fuel; a lower housing portion that defines a pintle-receiving cavity and an injector outlet; an electromagnetic coil assembly; a movable pintle that is: (i) located in the pintle-receiving cavity, (ii) biased to a closed position that is adapted to prevent fuel from flowing through the injector outlet, and (iii) movable, responsive to magnetic force produced by energizing the electromagnetic coil assembly, to an open position that is adapted to permit fuel to flow through the injector outlet; and a guide that is: (i) adapted to guide the movable pintle within the pintle-receiving cavity, and (ii) sized to be spaced apart from the movable pintle and provide a fluid bearing for the movable pintle during pintle movement.