2203results about "Rolling contact bearings" patented technology

The invention relates to the technical field of bearings, and discloses a ceramic angular contact ball bearing with high bearing capacity, the ceramic angular contact ball bearing comprises an outer ring, an inner ring, a rolling body, a retainer and an oil storage cavity, the outer ring is of a cylindrical structure, and the inner surface of the outer ring is in contact with the rolling body; the inner ring is positioned inside the outer ring, and the outer surface of the inner ring is contacted with the rolling body; and the rolling bodies are a plurality of spherical ceramic elements which are fixed and separated by the retainer. By optimizing the arrangement mode and material selection of the rolling bodies, the bearing has higher bearing capacity and anti-overturning performance under the high-load condition; the heat dissipation through holes are formed in the retainer, so that the heat dissipation performance of the bearing in the running process is remarkably improved, and the bearing failure risk caused by overheating is reduced; through the design of the oil storage cavity and the oil outlet micropores matched with the oil storage cavity, uniform supply of lubricating oil is achieved, and friction loss between the rolling body and the inner ring and the outer ring is reduced.

The helicopter rotor head structure comprises a propeller hub, a propeller clamp, a bearing and a variable pitch mechanism, the propeller hub is arranged at the top of a rotor main shaft, a connecting shaft is arranged in the propeller hub, the end of the connecting shaft extends out of the propeller hub, the end of the connecting shaft is sleeved with the bearing, and the end, away from blades, of the propeller clamp is sleeved with the bearing and rotationally connected with the connecting shaft; the bearings comprise an angular contact bearing, a thrust roller bearing and a deep groove ball bearing, and the angular contact bearing, the thrust roller bearing and the deep groove ball bearing are sequentially arranged in the length direction of the connecting shaft; and the variable-pitch mechanism is arranged on the rotor wing main shaft in a sleeving manner and is connected with the propeller clamp. The bearing has the technical effects that the angular contact bearing, the thrust roller bearing and the deep groove ball bearing are combined for use, so that the axial and radial bearing capacities of the whole bearing are obviously improved, the bearing is not easy to damage, and the whole service life is longer; and by arranging the variable pitch mechanism, the angle of the paddle can be flexibly adjusted, so that the lift force and the resistance generated by the rotor wing are adjusted.

A hub motor includes a housing rotatably disposed to a first shaft and a second shaft, and a motor installed in the housing and having a stator and a rotor. A reduction mechanism is installed in the housing, including a gear shaft connected with the rotor, a fixed bracket connected with the stator, a movable bracket disposed on the gear shaft and the second shaft, a first ring gear disposed to the fixed bracket, a second ring gear disposed to the housing, multiple first planet gears disposed to the movable bracket and meshed with the gear shaft and the first ring gear, and multiple second planet gears disposed to the second shaft and meshed with the movable bracket and the second ring gear. By 10 inserting a hollow tube into the first shaft, the gear shaft, the movable bracket, and the second shaft, the waterproof and dustproof performance can be enhanced.

The invention provides a high-precision mute bearing for an industrial robot, which is suitable for the technical field of bearings and comprises a steel ball frame assembly, and the steel ball frame assembly comprises a steel ball retainer and steel balls; the steel ball retainer comprises a positioning ring structure and a plurality of unit steel ball retainers, and the unit steel ball retainers are distributed on the positioning ring structure in an annular array; the steel balls are correspondingly and rotationally assembled on the unit steel ball retainers; the positioning ring structure comprises a positioning ring, a plurality of adjusting grooves are formed in the positioning ring, and the unit steel ball retainers are slidably mounted in the adjusting grooves in a one-to-one correspondence manner; the unit steel ball retainers finish the distance adjustment among the plurality of unit steel ball retainers through the positions of the telescopic structures arranged on the unit steel ball retainers in the adjusting grooves, and are used for adjusting the structures to adapt to the supporting strength; an adaptive adjusting structure adapts to the supporting strength, the bearing is prevented from being damaged easily, and the service life is prolonged; and the structure is switched timely for rotating use and hovering, and the structure is adjusted flexibly and reasonably according to force bearing points.

The invention discloses a gap-controllable retainer and a frictional resistance measuring method thereof, belongs to the technical field of mechanical equipment manufacturing, and solves the problem that an existing device can only test a retainer with a fixed gap and cannot simulate the influence of dynamic gap change on bearing performance. The retainer capable of controlling the gap comprises a retainer body capable of adjusting the gap between the retainer body and a rolling body, a retainer moving assembly and a gap adjusting part. The gap adjusting part comprises an adjusting motor, an eccentric wheel and a motor fixing frame. According to the retainer capable of controlling the gap, the gap between the retainer and a rolling body can be dynamically adjusted, the retainer can be matched with different types of ball-disc testing machines (rotary type and linear contact type) for friction resistance measurement, the gap between the rolling body and a pocket of the retainer can be flexibly adjusted by adjusting the motor and the eccentric wheel, and the friction resistance of the rolling body is measured. And therefore, the retainer main body can meet the retaining and limiting requirements of different working conditions and different types of bearings, and the performance, the service life and the reliability of the bearings are remarkably improved.

The present disclosure relates to a sealing arrangement (1) for a bearing, comprising a first sealing element (2), which is connectable to a bearing inner ring of the bearing, a second sealing element (3), which is connectable to a bearing outer ring of the bearing, and a sealing gap (4) formed between the first sealing element and the second sealing element, wherein the sealing gap is formed as a stepped labyrinth seal (5). The disclosure also relates to a bearing arrangement having a sealing arrangement of this kind.

The invention discloses a V-shaped thrust retainer which comprises an annular main body, and the annular main body is provided with pockets for mounting a rotating body; the pocket is provided with a V-shaped limiting part for limiting the rotation body to move in the axial direction of the pocket; the annular body is further provided with an outer oil storage part for containing lubricating oil, a buffering part and a buffering ring, the buffering part is arranged between every two adjacent pockets, an oil storage cavity is formed in each buffering part, and the buffering ring is arranged on the side wall of the inner ring of the annular body. Compared with a traditional arc-shaped / annular flange and other structures, the V-shaped limiting part can reduce the contact area of the rotating part and the limiting structure, friction loss is reduced, and lubricating oil consumption is reduced; by arranging the buffering part, the buffering layer can play a role in absorbing and damping, so that the rolling path of the rotating body can be kept stable, collision impact and vibration generated in the rolling process are further reduced through the stability of the rotating body, and finally the damping and noise reduction effects of the retainer and the bearing are achieved.

The utility model relates to the field of bearings, and discloses a precise self-aligning roller bearing, which comprises an outer ring, an oil duct at the center of the outer side wall of the outer ring, three oil injection ports annularly arranged on the outer side wall of the oil duct, an oil groove at the center of the inside of the outer ring, an inner ring at the inner side of the outer ring, and an isolation block at the center of the outer side wall of the inner ring. Raceways are arranged on the inner side wall of the outer ring and the outer side wall of the inner ring, hard coatings are arranged on the outer side walls of the two raceways, a plurality of balls are annularly arranged in the two raceways on the two sides of the isolation block, and a reinforced protection structure is arranged on the inner side wall of the inner ring. According to the utility model, through the reinforced protection structure of the aluminum alloy reinforced layer and the carbon fiber reinforced plastic reinforced layer, and the threads arranged on the inner side wall, the connection and the fixation are convenient, so that the structural strength of the inner ring is increased, the inner ring can bear larger load and impact force, the overall weight is reduced, and the stability and the practicability are improved.

The invention discloses a bearing, a slip monitoring method thereof and a holder stability monitoring and evaluating method, and relates to the technical field of intelligent bearings, the bearing comprises a bearing inner ring, a bearing outer ring and a holder, and the bearing outer ring is rotatably arranged on the periphery of the bearing inner ring in a sleeving mode; the retainer is rotatably sleeved between the bearing inner ring and the bearing outer ring, a plurality of rolling bodies are arranged on the retainer along the circumferential direction at intervals, any rolling body is in running fit with the retainer, the inner ring of the retainer is provided with a guide surface which is in rolling fit with the bearing inner ring, the guide surface is provided with a micro texture, the micro texture is provided with a pit, and the pit is provided with a plurality of concave holes. The sliding of the bearing is reduced, and the operation stability of the retainer is improved. By means of the bearing slip monitoring method and the holder stability monitoring and evaluating method, the current motion state of the bearing can be obtained, whether the bearing needs to be maintained or not is judged, and monitoring of the holder stability is more visual and convenient.

A process for determining the reliability of a sensorized bearing configured to measure load and speed is provided. The process includes the following steps. Bearing load and rotational speed are determined from data acquired from the sensorized bearing. Next, an array linking the determined load to the determined n·dm value is filled until that all available loads are parsed. Then a L10 life is determined for each load within a distribution based on the array. Finally, an overall L10 life is determined based on the Palmgren-Miner rule. The load distribution and the L10 lives a bearing reliability R for a given date is determined based on a Weibull curve and the overall L10 life. The process may be carried out by a computer having a processor and a memory.

A sealing device includes a body, a first lip protruding from the body, a second lip protruding from the body and positioned apart from the first lip in a radially inward direction of the first lip, a first grease applied to a surface of the first lip, and a second grease applied to a surface of the second lip. Properties of the first grease differ from properties of the second grease.

A gyroscopic roll stabilizer for a boat includes an enclosure mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure, and a flywheel assembly including a flywheel and flywheel shaft, with the flywheel assembly rotatably mounted inside the enclosure for rotation about a flywheel axis. The gyroscopic roll stabilizer also includes a motor operative to rotate the flywheel assembly and mounted in a boss that is integrally formed in the enclosure. A motor cooling circuit is configured to transfer heat away from the motor. The motor cooling circuit has a closed fluid pathway for recirculating cooling fluid therein. The fluid pathway extends through the boss so that the cooling fluid circulates through the boss around the motor. The gyroscopic roll stabilizer is configured to transfer heat away from the motor to the cooling fluid. Related methods are also disclosed.

To provide a method for manufacturing an outer ring of a hub unit bearing having three rows at low manufacturing cost.SOLUTION: A first negative gap is an axial negative gap between an outermost row and an innermost row in a case of assuming that a hub unit bearing is assembled with a hub disposed on a radially inner side of an outer ring 2 after completion of a grinding finishing process, and with a ball of the same gage disposed between three-row outer ring raceway 5a, 5b, 5c and three-row inner ring raceway. The difference between the first negative gap and a second negative gap, which is an axial negative gap between an intermediate row and one row, is made smaller than the difference between the first negative gap and the second negative gap in a case of assuming that a hub unit bearing is assembled with a hub disposed on the radially inner side of an outer ring 2 after completion of a super finishing process, and with a ball of the same gage disposed between three-row outer ring raceway 5a, 5b, 5c and three-row inner ring raceway.SELECTED DRAWING: Figure 1

To provide a vehicle wheel support device that can achieve commonization of components.SOLUTION: A vehicle wheel support device 10 comprises: a hub bearing 12 which rotatably supports a hub shaft 124 which is a rotary shaft body connected to a wheel W; a hub carrier 11 which has a storage hole part 111 for accommodating a part of the hub bearing 12, and supports the hub bearing 12 in the state of being accommodated in the storage hole part 111; a sensor 13 which is fixed to a fixed part 112 of the hub carrier 11 in the state that a detection part 131 for detecting a rotation state projects from an inner peripheral surface of the storage hole part 111 so as to detect the rotation state of an inner ring 122 around an axis thereof; and a cap 15 which prevents foreign matters from entering the inside of the hub bearing 12 from a space S that permits entry of the foreign matters, and with which a deflector member 15A, which is at least a part of a deflector 14 for isolating the detection part 131 in the space S, is formed integrally.SELECTED DRAWING: Figure 2

An anti-nuclear radiation magnetic fluid sealing device includes a magnetically conductive rotating shaft, a magnetically conductive housing, a left snap ring, a left bearing, a left magnetically isolating ring, a left pole shoe, a magnetically isolating sleeve, an outer permanent magnet, an inner permanent magnet, a right pole shoe, a right magnetically isolating ring, a right bearing, a right snap ring, an end cover, an anti-radiation coating, an anti-magnetic coating, a magnetic fluid I, and a magnetic fluid II. An outer magnetic circuit and an inner magnetic circuit are formed using the magnetically isolating sleeve. The magnetically conductive housing, the left pole shoe, the outer permanent magnet, the right pole shoe, and the magnetic fluid I forms a magnetic fluid static seal. The magnetically conductive rotating shaft, the left pole shoe, the inner permanent magnet, the right pole shoe, and the magnetic fluid II form a magnetic fluid dynamic seal.

A linear drive includes an output member which is linearly movable with respect to a drive housing, and which has a spindle nut and a hollow output rod connected thereto. The output member is linearly displaceable by means of a rotationally drivable threaded spindle, which is inserted through the spindle nut into the output rod. To support the threaded spindle, a support apparatus is provided at its anterior end section, which has a rolling bearing and a sliding sleeve seated thereon. The sliding sleeve is divided into sliding sleeve segments, which are connected to one another by resilient joints and are each prestressed with a support area section against the inner peripheral surface of the output rod.

A gyroscopic roll stabilizer comprises a gimbal having a support frame and enclosure configured to maintain a below-ambient pressure, a flywheel assembly including a flywheel and flywheel shaft, one or more bearings for rotatably mounting the flywheel inside the enclosure, a motor for rotating the flywheel, and bearing cooling system for cooling the bearings supporting the flywheel. For smaller units, the bearing cooling system is effective to enable a flywheel with a moment of inertia less than 40,000 lb in2 to be accelerated at a rate of 5 rpm / s or greater. For larger units, the bearing cooling system is effective to enable a flywheel with a moment of inertia greater than 40,000 lb in2 to be accelerated at a rate of 2.5 rpm / s or greater.

The utility model discloses a hub bearing which comprises an outer ring and an inner ring, a flange plate is connected to the inner ring, a connecting groove is formed in the inner ring, a connecting ring is arranged on the connecting groove in a matched mode, and rolling bodies are arranged between the outer ring and the inner ring and between the outer ring and the connecting ring respectively. A first sealing piece is arranged at the end, close to the flange plate, of the outer ring, a second sealing piece is arranged at the end, away from the flange plate, of the outer ring, one end of the first sealing piece is connected to the inner wall of the outer ring, the other end of the first sealing piece extends towards the inner ring, the first sealing piece is wrapped by a first sealing lip, and a sealing step is formed on the inner ring. A gap is formed between the outer edge of the sealing step and the edge of the outer ring, a plurality of sealing grooves are formed in the side wall of the sealing step, and the first sealing lip extends into the sealing grooves to form a first blocking lip. The sealing device is simple in structure, better in sealing effect, more stable in sealing structure and capable of avoiding early failure of a sealing part.

The invention discloses an aero-engine impact load deformation self-adaptive rotor-supporting structure, and belongs to the technical field of aero-engine bearing structure design. Comprising a rotor journal, a bearing, a bearing seat, a turn-back bushing, metal rubber and a sleeve. The rotor journal is used for transmitting rotor load, the bearing outer ring is installed on the bearing seat, the section of the turn-back lining is in a U shape, one end of the inner layer of the turn-back lining abuts against a shaft shoulder of the rotor journal, the other end of the turn-back lining presses and fixes the bearing inner ring through the nut and the sleeve, and the metal rubber is arranged in an interlayer of the turn-back lining. The turn-back bushing can reduce the rotor-bearing angular rigidity, allows larger angular misalignment, and reduces the load transmitted to the bearing and a force bearing system; the metal rubber can dissipate impact energy when the turn-back lining deforms. The turn-back lining and different inner rings can be combined in various modes, for example, the turn-back lining and the first inner ring can be manufactured into a whole, and when the turn-back lining is matched with the second inner ring or the third inner ring, a flexible lining can be matched to further reduce rigidity. By means of the structure, the safety and reliability of the aero-engine under the impact load are effectively improved.

A transmission device for transmitting a movement includes a screw extending along an axis, a nut, a housing, a first elastic member, a second elastic member,—a first assembly, a second assembly, a first axial stop, and a second axial stop. The first elastic member is able to be deformed independently of the second elastic member under the effect of a first axial force, and the second elastic member is able to be deformed independently of the first elastic member under the effect of a second axial force which exceeds a second threshold.

The invention provides a hub bearing unit which comprises a flange outer ring, a flange inner ring and a transmission shaft, the transmission shaft comprises a connecting part and a first spline, the connecting part is inserted into the flange inner ring and fastened through a bolt, the first spline is arranged around the connecting part, a second spline is arranged at the end, facing the transmission shaft, of the flange inner ring, and the second spline is arranged around the connecting part. The flange inner ring comprises an inner hole wall, the first tensioning piece is located on the movement path of the inner hole wall when the flange inner ring and the transmission shaft are assembled, and the first tensioning piece is located on the inner hole wall when the flange inner ring and the transmission shaft are assembled. After the distance between the first spline and the second spline is smaller than the abutting distance, the first spline and the second spline are in interference fit with the inner hole wall. Aiming at the defects in the prior art, the invention provides the hub bearing unit capable of effectively feeding back the spline matching state.

The utility model discloses a bearing assembly, a rotor assembly and an outer rotor fan, the bearing assembly comprises a sleeve, a rotating shaft and a plurality of rolling pieces, and the rotating shaft penetrates through the sleeve; the plurality of rolling pieces are arranged between the rotating shaft and the sleeve, and the rolling pieces are in rolling connection with the rotating shaft and the sleeve. According to the bearing assembly provided by the embodiment of the utility model, the rotating shaft is directly matched with the sleeve and the rolling piece, so that the rotating shaft and the bearing can form an integrated structure, the structure is simplified, and the assembly is convenient.

The utility model relates to the technical field of continuous casting machines, in particular to a high-temperature-resistant self-aligning roller bearing for a continuous casting machine, which comprises an inner ring, an outer ring and a radiating device, the outer ring is arranged on the outer side of the inner ring, a plurality of balls are mounted between the inner ring and the outer ring and are annularly arranged, and the radiating device is arranged on the surface of the inner ring and comprises a support ring. The supporting ring is arranged on one side of the inner ring and located on one side of the outer ring, a plurality of cooling fins are fixedly connected to the surface of the supporting ring and located on one side of the balls, and air holes are formed in the surfaces of the cooling fins and located on one side of the balls. According to the bearing disclosed by the utility model, the heat dissipation device is arranged, so that the heat dissipation of the bearing is effectively and conveniently realized, and after the bearing is used in a high-temperature environment for a certain time, as the heat dissipation device is arranged, the influence of high temperature on the use performance of the bearing is avoided, the service life of the bearing is prolonged, the heat dissipation performance of the bearing is improved, and the influence of high temperature on the use of the bearing is reduced.

The end face spline hub bearing comprises a flange inner ring, a small inner ring and an outer ring, the small inner ring is arranged on the outer side of the flange inner ring in a sleeving mode, the flange inner ring is provided with a retaining wall and an outer flange used for being limited with the small inner ring, a rolling assembly is arranged between the retaining wall and the outer flange, and a sealing assembly is arranged between the small inner ring and the outer ring. The outer side of the small inner ring is provided with a sealing matching surface, and the axial outer end of the outer flange is provided with an end face spline. A cylindrical protection element is fixedly installed at the axial outer end of the small inner ring, covers the outer flange and at least covers the end face spline meshing position. The axial outer end of the small inner ring is provided with a first matching surface, a second matching surface and a third matching surface, the first matching surface is in riveting fit with the outer flange, the second matching surface axially abuts against the protection element for limiting, and the third matching surface is in radial pressing contact with the inner side of the protection element. The radial outer side of the outer flange and the protective element are spaced to form an annular gap, and the inner and outer peripheral walls are respectively provided by the two. The end face spline hub bearing is provided with the protection element, foreign matter can be prevented from entering the bearing, the structure is simple, and machining, manufacturing and assembling are convenient.

A bearing system for a compressor including an unloader at least partially received within a recess of a driveshaft. The unloader includes an outer surface that is engaged with a bearing. An inner surface of the unloader is curved such that the unloader is pivotable relative to the driveshaft unload forces on bearing caused by deflection of the driveshaft.

The utility model belongs to the technical field of bearings, and specifically discloses a high-strength wear-resistant bearing, comprising an outer ring, an inner ring is arranged on the inner side of the outer ring, and a lubrication component is arranged inside the outer ring; the lubrication component comprises oil-absorbing fibers, the oil-absorbing fibers are located inside the outer ring, the cross-section of the oil-absorbing fibers is annular, an oil outlet ring is arranged on the inner side of the oil-absorbing fibers, a plurality of oil seepage holes are opened inside the oil outlet ring, a plurality of extrusion blocks are arranged on the outer side of the oil outlet ring, the plurality of extrusion blocks are located between the oil-absorbing fibers and the oil outlet ring, a plurality of oil injection holes are opened inside the outer ring, the plurality of oil injection holes are located on the top of the oil-absorbing fibers, and a one-way valve is arranged inside each of the oil injection holes. The utility model can enable the lubricant to be slowly discharged from the inside of the oil-absorbing fibers when the roller rolls between the outer ring and the inner ring through the arrangement of the lubrication component, so as to form a lubrication film in the rolling contact area, reduce the direct contact between the roller and the outer ring and the inner ring, thereby reducing friction and wear, and extending the service life of the bearing.

Disclosed in the present invention is a high-speed fan, at least comprising a rotating shaft, a motor, a fan blade, an air duct shell, and a bearing assembly, wherein the motor drives the rotating shaft to drive; the fan blade rotates along with rotation of the rotating shaft; the air duct shell is provided with a mounting portion; a mounting cavity is formed inside the mounting portion; the bearing assembly comprises a first bearing, a second bearing, and an elastic component that are accommodated in the mounting cavity; the outer ring of the first bearing and the outer ring of the second bearing are fixed to the mounting portion in the axial direction of the rotating shaft; the inner ring of the first bearing is in close fit with the rotating shaft, and the inner ring of the second bearing is in loose fit with the rotating shaft; the two ends of the elastic component are respectively connected to the inner ring of the first bearing and the inner ring of the second bearing; the inner ring of the first bearing and the inner ring of the second bearing are subjected to an elastic force given by the elastic component; the elastic component presses and covers the inner rings of the first bearing and the second bearing. Therefore, the present invention can effectively reduce the internal clearance of the bearings, thereby reducing axial shaking of the rotating shaft caused by the bearing clearance, reducing working noise, and prolonging the service life of the high-speed fan.