23results about "Hydrostatic bearings" patented technology

The invention provides a gas static pressure motion platform and a control method. The platform comprises a bottom plate, a guide rail, a gas floating slide carriage, a driving device, a gas static pressure rotary table, a flow controller, a sensor and a gas control valve. The guide rail is fixedly mounted on the bottom plate, and the air floatation slide carriage is slidably arranged on the guide rail; the driving device is arranged between the guide rail and the air floatation slide carriage and is in transmission connection with the air floatation slide carriage; the throttler is arranged on the air floatation slide carriage, an air inlet hole is formed in the air floatation slide carriage, the throttler is connected with the air inlet hole, and the plurality of air control valves are connected with the plurality of air inlet holes; the gas static pressure rotary table is mounted on the gas floating slide carriage; the gas control valve is connected with the numerical control system, and when the sensor detects that the gas static pressure motion platform deviates, the numerical control system controls the gas film pressure between the gas floating slide carriage and the guide rail by adjusting the gas pressure of the gas control valve according to a feedback signal of the sensor, and then the throttler is driven to move. And accurate adjustment of the position and the posture of the air floatation slide carriage is realized.

The invention relates to a hydrodynamic or hydrostatic sliding bearing (1) for the rotatable support of a shaft (3), in particular in a wind turbine (2), comprising at least one first sliding element (4) with a first sliding surface (5) which is arranged on an adapter structure (9), and a connecting structure (6) which serves to fasten the adapter structure (9), wherein the adapter structure (9) is arranged to be radially and / or axially displaceable, and wherein a first ramp section (7) is formed on the adapter structure (9) and a corresponding second ramp section (8) is formed on the connecting structure (6) such that an axial displacement of the adapter structure (9) relative to the connecting structure (6) causes a radial displacement of the sliding element (4) and / or vice versa, so that the bearing clearance of the sliding element (4) relative to the shaft (3) is adjustable.The axial offset is determined by means of at least one intermediate piece (10) which is inserted into a space (11) caused by the axial offset and thus produces a reproducible radial offset of the at least one sliding element (4).

The present disclosure provides a shaft sealing component, a compressor and a refrigerant circulation system. The shaft sealing component includes: a shaft sealing disc body, the center of the shaft sealing disc body has an axial hole, and the wall of the axial hole is provided with a shaft sealing structure; a shaft sealing positioning stop, which is coaxially and integrally arranged at one axial end of the shaft sealing disc body, and the shaft sealing positioning stop is provided with a first fluid channel connecting the radial inner side and the radial outer side of the shaft sealing positioning stop. The shaft sealing component provided by the present disclosure has the functions of shaft sealing, positioning and fluid discharge. The shaft sealing positioning stop is conducive to improving the matching accuracy between the shaft sealing component and the sealed rotating shaft, and can more effectively prevent fluid leakage. The first fluid channel is conducive to preventing the components adjacent to the shaft sealing component from retaining fluid, and is conducive to stabilizing the back pressure of related components, thereby helping to improve the stability of the bearing rotor system.

A foil throttling self-adaptive static pressure gas floating thrust bearing, which comprises a spring seat (1), a bearing base (2), a foil self-adaptive assembly (3) and a flat foil (4), wherein the foil self-adaptive assembly (3) comprises a spring (31), a piston (32) and a gas pipe quick connector (33), characterized in that the bearing base (2) is a hollow cylinder, the spring seat (1) is installed on the upper surface of the bearing base (2), the flat foil (4) is installed on the lower surface of the bearing base (2), and the foil self-adaptive assembly (3) is located inside the bearing base (2), wherein the piston (32) is installed on the upper surface of the flat foil (4), the spring (31) is located on the upper surface of the piston (32), and the gas pipe quick connector (33) is installed on the upper surface of the piston (32). The foil throttling static pressure gas floating thrust bearing has superior micro-vibration suppression performance and a longer service life.

A wind power main-shaft sliding bearing with bidirectional stresses and a wind power generation system are disclosed. The wind power main-shaft sliding bearing includes an outer ring, an inner ring and a tile block. The outer ring has an isosceles trapezoidal cross-section where the inner ring slides. The inner ring has a trapezoidal groove matching the outer ring shape. Symmetrical chutes are in two inner sloping faces of the trapezoidal groove. The tile block is in a cavity between the chute and the outer ring. The face of the tile block near the inner ring is spherical. The tile block separates first and second oil cavities, respectively near the outer and inner rings. Even when the sliding bearing is stressed with a load that deforms the inner ring, the tile block automatically adjusts the tilting angle, thereby avoiding tilting the outer ring due to operating pressure loss.

Provided is a spindle unit and a processing device, the spindle unit having an air bearing that enables continuous rotation of a spindle even in a situation where thermal deformation occurs and that is also excellent in load resistance. The spindle unit includes a spindle that has a processing tool attached to a front end, and a spindle housing that has a thrust bearing and a radial bearing that noncontactingly support the spindle so as to be rotatable by air, the thrust bearing having an air supply portion that supplies air to a gap between an outer side surface of the spindle in a direction perpendicular to an axial direction of the spindle and an inner side surface of the spindle housing, and an adjustment portion that is capable of adjusting a distance in a direction perpendicular to the outer side surface of the spindle of the gap.

The present invention relates to a wind power main-shaft sliding bearing with bidirectional stresses and a wind power generation system. The wind power main-shaft sliding bearing with the bidirectional stresses includes an outer ring, an inner ring and a tile block. The outer ring has an isosceles trapezoidal cross-section at the sliding place of an inner circle thereof. A trapezoidal groove matching the shape of the outer ring is formed at the corresponding position of the outer circle face of the inner ring. Chutes are formed at the two inner sloping faces of the trapezoidal groove, respectively. The chutes are disposed symmetrically at two sides. The tile block is disposed in a cavity formed between the chute and the inner circle face of the outer ring. The face of the tile block near the inner ring is a spherical face. The tile block divides an oil cavity into a first oil cavity and a second oil cavity. The first oil cavity is near the outer ring. The second oil cavity is near the inner ring. The first oil cavity is injected with a lubricant. The second oil cavity is injected with a high-pressure oil. Even when the sliding bearing is stressed with a large load so that the inner ring of the bearing is deformed, the tile block is capable of automatically adjusting a tilting angle, thereby avoiding the tilting of the outer ring of the bearing due to the loss of an operating pressure, allowing rotation to keep stable and being capable of allowing air gaps between a wind driven generator stator and a wind driven generator rotor to always maintain uniformity.

The invention provides a large surface throttling self-compensating ultra-precise hydrostatic pressure rotary table, and relates to the field of household kitchens. The large surface throttling self-compensating ultra-precise hydrostatic pressure rotary table comprises a first base, a second base is fixedly installed at the top of the first base, a stator ring is fixedly installed at the top of the second base, a rotor shaft is movably installed in the stator ring, and a connecting disc is fixedly installed at the top of the rotor shaft. An oil cavity and four thickened oil cavities distributed in an annular mode are formed in the stator ring. The base, the stator ring, the rotor shaft and other parts form a basic structure, the oil inlet pipe, the oil outlet pipe and the like form a circulating oil way, the thickness of an oil cavity is synchronously or independently adjusted by means of the adjusting assembly and the fixing assembly, and safety protection under extreme working conditions is provided in cooperation with the rolling shaft. The problem that in the prior art, the thickness of an oil cavity cannot be flexibly adjusted, and deviation of a rotor shaft cannot be coped is effectively solved, and the stability and machining precision of the rotary table in optical mirror machining are improved.

The invention relates to a hydrodynamic or hydrostatic plain bearing (1) for rotatably supporting a shaft (3), in particular in a wind turbine (2), comprising at least one first sliding element (4) with a first sliding surface (5), which is provided on an adapter structure (9), and a connecting structure (6), which is used to secure the adapter structure (9), said adapter structure (9) being mounted so as to be radially and / or axially movable. A first ramp portion (7) is formed on the adapter structure (9) and a corresponding second ramp portion (8) is formed on the connecting structure (6) such that an axial offset of the adapter structure (9) relative to the connecting structure (6) produces a radial offset of the sliding element (4) and / or vice versa so that the bearing play of the sliding element (4) relative to the shaft (3) can be adjusted. The axial offset is determined by means of at least one intermediate piece (10), which is introduced into an intermediate space (11) brought about by the axial offset and thus creates a reproducible radial offset of the at least one sliding element (4).

The invention discloses a self-adaptive hydrostatic bearing adaptive to the surface shape change of a track surface, belongs to the technical field of hydrostatic bearings, and is used for providing active one-dimensional attitude compensation on a linear motion platform and a rotary platform when the surface shape of the track surface is changed. The core is that a four-oil-cavity structure is adopted, and a detachable self-feedback throttler is arranged at an oil inlet of each oil cavity; and meanwhile, the bearing seat is connected with the semi-cylindrical supporting block through a pair of conjugated cylindrical matching surfaces. During working, hydraulic oil enters the oil cavity through the self-feedback throttler to form a bearing oil film. The self-feedback throttler can adaptively adjust the flow according to the pressure change of the oil cavity, and the change of the surface shape of the matched track surface of the conjugate cylindrical surface allows the oil pad to slightly deflect in one dimension around the axis. Under the synergistic effect, when the track surface slightly inclines, the pressure distribution of all the oil cavities is dynamically adjusted, active posture compensation is achieved, it is ensured that a stable oil film gap is formed between bearing surfaces, and finally the high bearing capacity and the high supporting rigidity are obtained.

The present application relates to air bearing technical field, specifically for wide speed big load supercritical carbon dioxide dynamic pressure tilting pad bearing system, including with supercritical carbon dioxide flow passage's tilting pad bearing, supercritical carbon dioxide gas supply control loop and temperature, pressure acquisition circuit;With supercritical carbon dioxide flow passage's tilting pad bearing includes bearing shell, damper and tile, the tile, damper and bearing shell are sequentially arranged from inside to outside, and tile and damper are respectively fixed on bearing shell.The present application increases damper between bearing tile and bearing shell, effectively improves the damping characteristic and stability of bearing, dynamic pressure mixed lubrication mode improves the lubricating performance under S-CO2 medium, overcomes the defect of static pressure bearing under high speed, significantly improves the comprehensive service performance of bearing, so that it can maintain good lubricating performance and carrying capacity in wide speed range.

The present invention relates to a wind power main-shaft sliding bearing with bidirectional stresses and a wind power generation system. The wind power main-shaft sliding bearing with the bidirectional stresses includes an outer ring, an inner ring and a tile block. The outer ring has an isosceles trapezoidal cross-section at the sliding place of an inner circle thereof. A trapezoidal groove matching the shape of the outer ring is formed at the corresponding position of the outer circle face of the inner ring. Chutes are formed at the two inner sloping faces of the trapezoidal groove, respectively. The chutes are disposed symmetrically at two sides. The tile block is disposed in a cavity formed between the chute and the inner circle face of the outer ring. The face of the tile block near the inner ring is a spherical face. The tile block divides an oil cavity into a first oil cavity and a second oil cavity. The first oil cavity is near the outer ring. The second oil cavity is near the inner ring. The first oil cavity is injected with a lubricant. The second oil cavity is injected with a high-pressure oil. Even when the sliding bearing is stressed with a large load so that the inner ring of the bearing is deformed, the tile block is capable of automatically adjusting a tilting angle, thereby avoiding the tilting of the outer ring of the bearing due to the loss of an operating pressure, allowing rotation to keep stable and being capable of allowing air gaps between a wind driven generator stator and a wind driven generator rotor to always maintain uniformity.

The invention relates to a bearing arrangement (1) for a rotor shaft (2) of a wind turbine (3), comprising at least the following components: - at least one rotary bearing (4) for bearing a rotor shaft (2) that can be rotated about a rotor axis (5); - a bearing housing (6) for receiving the rotary bearing (4); - a base frame (7) for receiving the bearing housing (6). The bearing arrangement (1) is characterized in particular by the fact that the bearing housing (6) is mounted relative to the base frame (7) by means of a tilting bearing arrangement (8). The storage arrangement proposed here allows for a functionally safe and cost-effective tilting storage system.

The invention discloses a self-adaptive hydrostatic bearing, belongs to the technical field of hydrostatic bearings, and is used for providing active small-range two-dimensional rotary motion when a track surface of a guide rail or a rotary table is slightly inclined and has surface shape change. The adjusting ball supporting seat is characterized in that a concave conical supporting surface is arranged on the adjusting ball supporting seat and is in linear contact with the adjusting ball, a four-oil-cavity structure is adopted, and an oil inlet of each oil cavity is provided with a detachable self-feedback throttler. During working, hydraulic oil enters the oil cavity through the self-feedback throttler to form a bearing oil film. The self-feedback throttler can adjust the flow in a self-adaptive mode according to the pressure change of the oil cavity, and the matching structure of the inwards-concave conical supporting face and the adjusting ball allows the oil pad assembly to conduct small-range two-dimensional rotation motion. Under the synergistic effect, when the track surface slightly inclines, the pressure distribution of all the oil cavities is dynamically adjusted, posture compensation is achieved, the surface shape change of the track surface is adapted, it is ensured that a stable oil film gap is formed between bearing surfaces, and finally the high bearing capacity and the high supporting rigidity are obtained.

The lubricant-supported electric motor includes a stator having an outer raceway and a rotor extending along an axis and rotatably disposed within the stator. The rotor has an inner raceway spaced apart from the outer raceway to define a gap between them. Lubricant is disposed in the gap to support the rotor within the stator. At least one of the outer or inner raceways may be radially movable toward or away from the other to adjust the gap and optimize the operation of the lubricant-supported electric motor.

The invention discloses a gas film pressure active compensation type gas static pressure bearing and a working method thereof. The gas film pressure active compensation type gas static pressure bearing comprises a bearing body, and two circles of throttling holes are evenly distributed in the circumferential direction of the working face of the bearing body; a plurality of grooves are evenly formed in the outer side wall of the bearing body in the circumferential direction, magnetic control flow valves are arranged in the grooves, when the strip-shaped magnets rotate to the corresponding positions, the magnetic control flow valves are opened under the action of repulsive force, the compensation throttling holes are communicated with flow valve inlet flow channels, pressure is supplemented through the corresponding compensation throttling holes, and the flow valve inlet flow channels are communicated with the magnetic control flow valves. Therefore, active compensation of the pressure is realized; according to the invention, active compensation for the pressure of the gas film is realized when the bearing bears a large load or the load fluctuation is relatively large, the thickness of the gas film is always controlled within an allowable range, and the rigidity, the bearing capacity and the stability of the bearing are improved.

An electric machine comprises a stator (1) having a stator body (25) supporting an electric stator (3) and a rotor (5) supported by a bearing comprising a radial bearing portion (17) forming a radial gas bearing and an axial bearing portion (12) forming an axial gas bearing, the stator-side portion of these bearing portions comprising an axial bearing assembly (11) and a bushing (18). The bushing (18) is aligned with respect to the stator body (25) by aligning the bushing (18) with respect to a reference body (143) and by aligning the reference body (143) with respect to the stator body (25). The rotor (5) is removable from the stator body (25) while retaining the reference body (143) in situ.

The invention discloses a static pressure gas bearing with self-sensing and self-driving functions and an implementation method of the static pressure gas bearing, and provides an innovative technical scheme for machining an adjustable pressure equalizing cavity on the working surface of a bearing disc aiming at the technical problems that a traditional small-hole throttling bearing is easy to cause air hammer vibration and a traditional annular surface throttling bearing is relatively weak in bearing capacity. According to the bearing, the annular pressure equalizing cavity is machined in the working surface of the bearing disc, the equivalent effect of small hole throttling is achieved through the structural form of annular face throttling, the occurrence probability of air hammer vibration is remarkably reduced, and the bearing capacity of the bearing is effectively improved. Besides, a microprocessor and a micro sensing driving mechanism (such as an MEMS element or a PZT and other special materials) are integrated in the annular pressure equalizing cavity, and an intelligent control algorithm is combined, so that the bearing has a self-sensing and self-driving function, parameters such as acceleration, temperature and gas film pressure can be sensed in real time, and the performance of the bearing can be regulated and controlled in real time according to an external excitation signal. The working stability, the bearing capacity and the intelligent regulation and control level of the bearing are remarkably improved, and the bearing is suitable for various complex working conditions.

The application relates to a satellite attitude control simulation device air floating bearing design method and device. The method comprises the following steps: stress analysis is performed on a satellite attitude control simulation device air floating bearing to obtain a throttle air inlet layout angle and a ball socket wrapping angle; the total area of an air outlet is calculated according to the ball socket wrapping angle, the air film thickness and a pre-set ball socket radius, the total area of an air inlet is equal to the total area of the air outlet, the number of throttle air inlets is calculated according to the total area of the air inlet, the throttle air inlet radius and the air film thickness; the air floating ball radius is determined according to the ball socket radius, the air film pressure is calculated by using the pre-set bearing capacity and the air floating ball radius, and the air floating bearing is designed by using the throttle air inlet layout angle, the ball socket wrapping angle, the number of throttle air inlets, the air floating ball radius and the air film pressure. The method can quickly realize air floating bearing design.

An electrical machine comprises a stator (1) with a stator body (25) supporting an electrical stator (3) and a rotor (5), the rotor (5) being supported by means of a bearing comprising a radial bearing section (17) forming a radial gas bearing and an axial bearing section (12) forming an axial gas bearing, the stator side parts of these bearing sections comprising an axial bearing assembly (11) and a bushing (18). The bushing (18) is aligned relative to the stator body (25) by the bushing (18) being aligned relative to a reference body (143) and by the reference body (143) being aligned relative to the stator body (25). The rotor (5) is removable from the stator body (25) while leaving the reference body (143) in place.

The invention relates to a hydrodynamic or hydrostatic sliding bearing (1) for the rotatable support of a shaft (3), in particular in a wind turbine (2), comprising at least one first sliding element (4) with a first sliding surface (5) which is arranged on an adapter structure (9), and a connecting structure (6) which serves to fasten the adapter structure (9), wherein the adapter structure (9) is arranged to be radially and / or axially displaceable, and wherein a first ramp section (7) is formed on the adapter structure (9) and a corresponding second ramp section (8) is formed on the connecting structure (6) such that an axial displacement of the adapter structure (9) relative to the connecting structure (6) causes a radial displacement of the sliding element (4) and / or vice versa, so that the bearing clearance of the sliding element (4) relative to the shaft (3) is adjustable.The axial offset is determined by means of at least one intermediate piece (10) which is inserted into a space (11) caused by the axial offset and thus produces a reproducible radial offset of the at least one sliding element (4).

The application provides a gas turbine eccentricity compensation air floating bearing, which comprises a shell, an outer supporting ring and a plurality of air floating blocks, the shell is wrapped on the outer circumferential surface of the outer supporting ring, an air inlet is arranged on the shell, and an equalizing ring cavity in communication with the air inlet is formed between the outer supporting ring and the shell; the plurality of air floating blocks are fixedly arranged on the inner circumferential surface of the outer supporting ring in a circumferential array, a gas passage hole penetrating through the outer supporting ring in a radial direction is arranged on the outer supporting ring at a position corresponding to each air floating block, a gas supply hole penetrating through the thickness direction of the air floating block in a radial direction is arranged on the air floating block at a position corresponding to the gas passage hole, and the gas passage hole is in communication with the equalizing ring cavity and the gas supply hole; the air floating bearing is improved on the basis of a conventional air floating bearing, the gas film thickness is changed through gas film pressure control, and the purpose of compensating the eccentricity of the shaft in the air floating bearing is expected to be achieved.

A spherical fluid-film bearing for supporting a rotating shaft includes a first bearing element and a second bearing element positioned along the rotating shaft in opposite orientations. Each bearing element also includes a rotor having bearing surface formed as a spherical segment. Additional stabilizing features may be included in the spherical fluid-film bearing, including mechanical springs, hydraulic pistons and a high pressure lubrication system.