342 results about "Rolling-element bearing" patented technology

The utility model discloses a kind of paper label cutting circle tool, including lower bottom plate, rear support plate, top plate, slide plate, sliding guide support assembly, cutting tool assembly, hand wheel, linkage rod and press ring;The paper label is placed on lower bottom plate;The press ring is pressed on the paper label on lower bottom plate;The cutting tool assembly includes the rolling bearing inlayed on slide plate, the center shaft of being set on rolling bearing and top and hand wheel connection, the scale frame being set on center shaft, the strip slot being opened on scale frame, the blade holder being placed in strip slot upper portion, the blade being fixed in the lower portion of blade holder, the scale pointer frame being set on blade holder and scale frame, and the screw of being connected on blade holder by thread and scale pointer frame is extruded on scale frame;Scale is printed on the scale frame;The center of the label is coincident with center shaft;Hand wheel drives blade to rotate with center shaft as center.

This invention discloses a hardening device and method for rolling bearing steel balls, relating to the field of surface hardening treatment technology. The hardening device includes a bath, an elastic base disposed below the bath, a working medium and steel balls inside the bath, the working medium comprising alloy element powder, abrasive powder, and a conductive solution, a pulsed plasma gun positioned above the bath, the outlet end of the pulsed plasma gun inserted into the bath with its axis intersecting the vertical axis of the bath at an acute angle, and an electromagnet for attracting steel balls mounted on the surface of the bath. A matching hardening method is also provided. The technical solution of this invention forms a high-hardness alloy layer on the surface of the steel ball, improving the hardening quality of the steel ball surface and enabling the steel ball to meet the performance requirements for use under high load and corrosive environments.

The application relates to a main shaft fault identification method for a wind driven generator under a variable load operation state, and the method comprises the following steps: acquiring and storing at least two equal-angle interval sampling vibration signals in orthogonal directions in the radial plane of the front and rear rolling bearings of the main shaft and corresponding rotating speed signals; judging whether the storage amount of the equal-angle interval sampling vibration signals reaches a preset storage amount, if the judgment is yes, performing order spectrum calculation on the equal-angle interval sampling vibration signals, and extracting a fault feature vector; judging whether to trigger main shaft fault diagnosis according to a real-time vibration effective value, if the judgment is yes, inputting the fault feature vector into a pre-constructed confidence rule base model, obtaining the confidence degree distribution of each fault state through confidence reasoning, and identifying the unbalance and misalignment faults of the main shaft of the wind driven generator according to the confidence degree distribution. Compared with the prior art, the application can accurately extract non-stationary fault features under the variable load operation state of the wind driven generator, and improves the accuracy and reliability of fault diagnosis.

This application discloses a door hinge device with a buffer function, aiming to solve the problems of existing door hinges being easily impacted, severely worn, and having a short structural lifespan during frequent and rapid opening and closing. The device includes a mounting base, a hinge arm, a hinge pin, and a hydraulic cylinder. The two ends of the hydraulic cylinder are eccentrically arranged relative to a first rotation axis defined by the hinge pin, allowing for passive extension and retraction during door opening or closing to provide buffering damping. A rolling bearing is installed between the hinge pin and the hinge arm to reduce friction and extend service life. Anti-wear pads are installed between the hinge arm and the mounting base to reduce direct contact wear. The cylinder body of the hydraulic cylinder is fixedly connected to the hinge arm, and the push rod is connected to a lug plate on the mounting base via a rotating joint, thereby improving the overall structure's buffering energy absorption capacity, stability, and durability. This technical solution can significantly reduce impact loads, improve the smoothness of door opening and closing, and enhance overall vehicle safety performance.

[Problem] To facilitate the manufacture of a bearing seal that prevents electrical corrosion of a rolling bearing. [Solution] A bearing seal 1 for use in a rolling bearing comprises an annular sealing ring 2. The sealing ring 2 comprises a core metal 3 having a section 3B that contacts an outer ring 11, and an elastic body 4 connected to a laterally outer BO surface of the core metal 3. The elastic body 4 has an inner diameter lip section 7 extending toward an outer circumferential surface 12A of the inner ring 12 and inclined in a laterally outer direction BO as it approaches the outer circumferential surface 12A. A conductive element 5 is held such that an inner diameter section D, extending in a substantially radial direction R between the core metal 3 and the elastic body 4, abuts it.The conductive element 5 has a section that contacts the inner ring 12 and has an annular shape in a substantially single plane, which is its shape prior to installation of the bearing seal in the rolling bearing. The conductive element 5 is pressed by a restoring force of the inner diameter lip section 7, which is elastically deformed to contact the inner ring 12 while installed in the rolling bearing.

The invention relates to a system (1) for the oil-air lubrication of rolling bearings (8, 9, 10, 11), comprising: a lubrication unit (2) having a unit controller (3), a data interface (4), a storage tank (5) for lubricant and lubrication ports (6); lubricant lines (7) which extend from the lubrication ports (6) to the rolling bearings (8, 9, 10, 11); a memory unit (20, 21) in which lubrication parameter data for at least one of the rolling bearings (8, 9, 10, 11) are stored; and a data connection (22) for transmitting the lubrication parameter data to the data interface (4) of the lubrication unit (2). The unit controller (3) is designed to lubricate the rolling bearings (8, 9, 10, 11) on the basis of the lubrication parameter data.

This invention provides a method, apparatus, and electronic device for diagnosing rolling bearing faults in wind turbines, relating to the technical field of wind turbine fault diagnosis. The method includes acquiring wind turbine operating data and generating time-frequency data through preprocessing; training a pre-constructed backbone network model using a meta-transfer learning strategy based on known operating condition samples to obtain a meta-transfer network model; inputting unknown operating condition samples into the meta-transfer network model for fault diagnosis and outputting fault diagnosis results. This invention solves the technical problems of poor fault diagnosis accuracy and weak generalization ability of rolling bearings in wind turbines under small sample and variable operating conditions, thus improving the accuracy of fault diagnosis.

A direct-drive rotary roll drive structure is disclosed, comprising a planetary gear reducer fixed to the rear side of a housing, connected to a servo motor, and the output shaft of the planetary gear reducer connected to the rear end of a main shaft located inside the housing. The main shaft is mounted on the center holes on the front and rear sides of the housing via first and second rolling bearings, and a chuck mechanism is connected to the front end of the main shaft. This direct-drive rotary roll drive structure applies the precise rotation control of a servo motor to the rotary processing of rolls, resulting in a simple mechanical structure and high precision.

The utility model discloses a kind of rotary tray type multi-face appearance detection devices, it is related to the technical field of visual inspection, including pedestal, horizontal guide rail, servo motor and bevel gear, the top of the pedestal is provided with carousel, the bottom of the carousel is provided with transposition mechanism, the bottom end of carousel is rotated by the gear ring disc of transposition mechanism, and then the position of carousel detected is adjusted, the side of the pedestal is provided with positioning mechanism, the spacing of the equipment and pedestal for detection is adjusted according to the requirement of use, cooperate the workpiece of corresponding height, the height of detection equipment is adjusted simultaneously by longitudinal guide rail. Gear ring disc passes through transmission shaft and transmits power to carousel, drive workpiece rotation, by replacing different number of control gear, the rotating speed of carousel can be flexibly adjusted, adapt to the processing requirement of different workpieces, rolling bearing connects gear ring disc and pedestal, reduce friction and vibration.

The utility model discloses a kind of vehicle permanent magnet synchronous motor, it is related to the technical field of permanent magnet synchronous motor, including motor shell, front end cover, rear end cover and rotor core, the side of the motor shell is provided with front end cover, the side of the front end cover is connected with rolling bearing and penetrates, the both sides of the motor shell are connected with fin piece, the side of the front end cover is provided with exhaust mechanism, the internal heat of motor shell is exhaust treated by the exhaust mechanism, while taking away the internal water cooling liquid heat of motor shell, the side of the motor shell is provided with cooling mechanism, the air of outside is directly sucked into the inside of motor shell by the cooling mechanism. Rear end cover is purified to inhaled air by filter screen, remove impurities such as dust or particulate matter, prevent them from gathering on coil surface and reduce heat exchange efficiency;Subsequently flowing air forced convection flows through coil surface, absorbs the heat of liquid inside coil.

The present invention provides a locking device for a rolling bearing comprising an inner ring, an outer ring and rolling elements between them, characterized in that the locking device comprises: an inner shoulder, wherein at least a portion of an inner surface of the inner shoulder is suitable for mounting on an outer surface of the rotating shaft and at least a portion of an outer surface of the inner shoulder defines a first contact surface; an outer shoulder, wherein at least a portion of an inner surface of the outer shoulder defines a second contact surface and at least a portion of the outer surface of the outer shoulder is suitable for contacting an inner surface of the inner ring;a bolt configured to lock the inner and outer shoulders in the axial direction such that the first and second contact surfaces are firmly in contact, and such that the inner shoulder can lock the rotating shaft and the outer shoulder can lock the inner ring of the rolling bearing. The present invention also provides a rolling bearing and a rotating shaft assembly comprising the locking device described above. The locking device has advantages such as simple assembly, no damage to the rotating shaft, a high degree of concentricity during assembly, and high locking force.

This invention belongs to the technical field of fault diagnosis for rotating machinery and discloses a method for constructing a rolling bearing fault diagnosis model, its application, and electronic equipment. The method includes: collecting vibration signals of the rolling bearing under different health conditions; for each health condition, constructing an objective function based on the envelope entropy of the IMF components obtained from VMD decomposition to optimize and obtain optimal VMD parameters; performing vibration signal decomposition based on the optimal VMD parameters; constructing a feature vector based on the energy entropy of the IMF components obtained from the decomposition under the optimal VMD parameters; and obtaining a fault diagnosis model through training and optimization using the feature vector as input and the fault type as output. This invention determines the optimal VMD parameters for different bearing fault types through an optimization algorithm. K , α This enables adaptive and high-fidelity decomposition of vibration signals, ensuring the effective separation of weak fault features and improving diagnostic accuracy.

The swing-arm double-gear power transmission mechanism is a type of engine that eliminates the crankshaft structure of the traditional cylinder piston connecting rod crankshaft engine, replacing it with a swing-arm double-gear power transmission mechanism. This mechanism consists of a straight rod fixed to the piston, a U-shaped gear carrier fixed to the straight rod, and two fork plates under the U-shaped gear carrier, each with a long, narrow opening in the middle. At the rear end of each fork plate, there is also a shaft hole. Between the two fork plates of the U-shaped gear carrier, a pair of meshing gears are installed. A connecting plate is installed on each side of the gears, and each connecting plate has a shaft hole corresponding to the gear shaft position, allowing for sliding fit with the gear shaft or a rolling bearing fit. After passing through the connecting plates, both ends of the gear shaft are fixed to a pair of swing arms. The other end of the upper gear's swing arm is fixed to the power output main shaft and the flywheel energy storage sub-shaft, respectively. The lower gear's swing arm... At the other end, it engages with the shaft holes or rolling bearings on the two fork plates of the U-shaped gear carrier. Driven by the engine starter, the main shaft transmits rotation to the upper gear of this structure, which in turn transmits it to the meshing lower gear. This, in turn, drives the U-shaped gear carrier to move along the direction of the cylinder piston, preparing the engine for the four-stroke power stroke. When the engine ignites and begins the power stroke, the piston drives the U-shaped gear carrier, and through the initial operating mode, the gear set, in turn, pushes the main shaft to continue rotating in the direction it began to rotate, performing power. At the end of the power stroke, the flywheel releases its stored energy, continuing to complete the other strokes of the engine, forming a continuous cycle of power delivery. Because of this continuous cycle, the main shaft continuously outputs power, eliminating all the defects of traditional crankshaft engines. This swing arm double-gear power transmission mechanism has an extremely simple structure, reliable operation, is very easy to manufacture, process, install, and maintain, has low cost, and extremely high thermal efficiency. It is suitable for all applications and equipment using traditional cylinder piston crankshaft engines.

Non-recirculating rolling element bearing (100) in an overrunning cage configuration, comprising a guide (103), a motion stage (101) and a cage(102). The guide defines a direction of motion and comprises a first guiding surface (108) being essentially V-shaped. The first guiding surface comprises a first and a second rolling surface. The motion stage is arranged to move along the direction of motion between a first end (112) and a second end (113) of the guide. The motion stage comprises a second guiding surface (109) comprising a third and a fourth rolling surface arranged opposite to the first and second rolling surface, respectively. The cage is arranged to be partially interposed between the guide and the motion stage. The cage comprises a first (105), a second and a third (106, 107) set of rolling elements. The first set is arranged to roll on the first and third rolling surface. The second set is arranged to roll on the second and fourth rolling surface. The third set is arranged to roll on the first rolling surface. The guide and each rolling element of the third set are arranged to magnetically attract one another so as to bias the cage towards the guide. In a first state, in which the motion stage is moved towards the first end of the guide, a first rolling element of the third set is positioned between the second end of the guide and a first end (115) of the motion stage arranged nearest to the second end of the guide. In a second state, in which the motion stage is moved towards the second end of the guide, a second rolling element of the third set is positioned between the first end of the guide and a second end (114) of the motion stage nearest to the first end of the guide.

The application belongs to the technical field of rotating machinery condition monitoring and fault diagnosis. A bearing failure evaluation method and system are provided. The bearing vibration signal is obtained and processed by mean removal and absolute value to obtain a to-be-processed signal. Then, the lower threshold of the tail part is determined, and the tail sample set with an amplitude greater than the threshold is screened out. Then, a soft-truncated power-law distribution model is constructed based on the tail sample set, and the distribution parameters including the power-law tail index, the truncated scale parameter and the truncated smooth index are solved by maximum likelihood estimation. Then, the analytical expression of the improved Gini index is constructed according to the distribution parameters, and the bearing degradation degree index is calculated. Finally, the bearing degradation curve is constructed according to the degradation degree index of different time periods. The application accurately describes the impact characteristics of the tail part of the vibration signal by the soft-truncated power-law model, and quantifies the degradation degree by the improved Gini index, which can effectively evaluate the health status and failure trend of the rolling bearing.

A bearing damage detection system includes a rotation sensor that detects rotation of a rolling bearing and outputs a rotation signal, a rotation fluctuation extraction section that extracts rotation fluctuation of the rolling bearing from the rotation signal and generates a rotation fluctuation signal, a frequency analysis section that performs frequency analysis on a waveform of the rotation fluctuation signal and derives a frequency characteristic, a peak intensity calculation section that derives a peak intensity corresponding to bearing damage from the frequency characteristic, and a damage detection section that detects bearing damage of the rolling bearing based on the peak intensity. The rotation fluctuation extraction section derives a waveform of the rotation fluctuation signal from which various noises are removed.

This invention relates to a method for modeling the vibration of rolling bearings considering non-ideal Hertzian contact, belonging to the field of bearing vibration modeling technology, and includes the following steps: S1: Obtaining the basic geometric and material parameters of the rolling bearing; S2: Calculating the angular range of the load zone of the rolling bearing; S3: Calculating the geometric parameters of the contact between the rolling elements and the healthy raceway; S4: Calculating the mechanical parameters of the contact between the rolling elements and the healthy raceway; S5: Calculating the cage angular velocity parameters; S6: Calculating the angular position and angular velocity parameters of the rolling element's circumferential motion; S7: Calculating the deformation and contact force generated by all rolling elements in contact with the healthy raceway of the bearing; S8: Calculating the time-varying mechanical parameters implied by the contact between the rolling elements and the defect; S9: Dynamic modeling of the vibration excitation mechanism of the rolling bearing defect.

This invention discloses a rolling bearing fault detection method based on Kolmogorov-Arnold network + STFT, belonging to the field of mechanical fault diagnosis technology. This method collects rolling bearing operating signals through vibration sensors, performs time-frequency analysis on non-stationary vibration signals using Short-Time Fourier Transform (STFT), generates a time-frequency energy distribution map, and extracts multi-scale time-frequency features as fault characterization. Subsequently, a Kolmogorov-Arnold network (KAN) model is constructed, and its unique nonlinear superposition structure performs high-order correlation analysis on the time-frequency features, automatically learning the complex mapping relationship between fault modes and features. Compared with traditional neural networks, KAN uses a learnable activation function and achieves high-precision feature fitting through spline interpolation, significantly improving the sensitivity to weak fault features. This method integrates the advantages of time-frequency analysis and adaptive networks, solving the problems of insufficient feature extraction for non-stationary signals and weak model generalization ability in traditional methods. Experiments show that its fault identification accuracy reaches 98.7%, the detection response time is reduced by 40%, and it maintains over 90% detection stability even in strong noise environments, making it suitable for online monitoring systems of industrial equipment.

The application discloses a rolling bearing degradation trend prediction method based on linear regression and TCN, characterized in that: firstly, the full life cycle vibration data of the rolling bearing is collected through an acceleration sensor, the sample entropy of the data is calculated and obtained as the performance degradation index of the bearing, the sample entropy is preprocessed smoothly, then the SPT point of the bearing is determined according to the linear regression model and mu+3delta, the influence of different window lengths on the determination of the SPT is analyzed, finally the preprocessed sample entropy value is input into the trained TCN network for degradation trend prediction. The application can effectively and timely determine the SPT point of the bearing, the TCN can well fit the performance degradation trend of the bearing, and the problem that the equipment cannot be safely operated due to the too late discovery of the bearing fault is avoided; compared with the method of adopting the recurrent neural network prediction, the accuracy of the method for the equipment health management is obviously improved, and a new idea is provided for the degradation trend prediction method of the bearing.

Injection mold (1) for overmolding an outer circumferential surface of an outer ring (3) of a rolling bearing (2) with a plastic layer, wherein the rolling bearing (2) has an inner ring (4), the outer ring (3) and a plurality of rolling elements (5) arranged between the inner ring (4) and the outer ring (3), comprising a pre-centering device and a fine centering device, wherein the pre-centering device is formed via a central mandrel (6) of a main mold body (7) on which the inner ring (4) of the rolling bearing (2) can be axially guided, and wherein the fine centering device is formed via at least three radial centering projections (8) of a mold insert (9) distributed circumferentially with respect to an outer diameter of the outer ring (3), and a method for overmolding an outer circumferential surface of an outer ring (3) of a rolling bearing (2) using such an injection mold (1).

The present invention accurately estimates the lifetime of a support component by even considering the shape of foreign matter generated inside the support component, such as a rolling bearing for supporting a rotating body.　This lifetime estimation system, which estimates the lifetime of a component supporting a rotating body, executes: a particle size analysis step for analyzing a particle size distribution of foreign matter mixed in a lubricant supplied to the component; a shape analysis step for analyzing a shape composition ratio of the foreign matter mixed in the lubricant; a calculation step for determining the degree of contamination of the lubricant on the basis of the particle size distribution, and calculating a correction lifetime coefficient used for estimating the lifetime of the component on the basis of the degree of contamination; a calculation step for calculating a correction coefficient for correcting the correction lifetime coefficient on the basis of the shape composition ratio; and a correction step for synthesizing the correction coefficient with the correction lifetime coefficient to correct the correction lifetime coefficient.

Stress wave gear in pot or hat design with a. a circular spline (1) whose circular spline toothing (2) has a number of teeth Cz of 100 < Cz < 104, in particular Cz = 102 teeth, b. a flexspline (3) whose flexspline toothing (4) has a number of teeth Fz of Fz = Cz-2 and a pitch circle diameter TDFS and engages in the circular spline toothing (2) at two opposite points and whose wall (5) in its basic form is circular in cross-section and has a flexspline inner diameter IDFS, and with c. a shaft generator (6) having a radially flexible rolling bearing (7) by means of which an oval shaft generator insert (8) is rotatably mounted, characterized in that d. for the pitch circle diameter TDFS: 34.4 mm < TDFS < 35.4 mm, in particular 34.9 mm, and / or that for the flex spline inner diameter IDFS: 33.4 mm < IDFS < 34.4 mm, in particular IDFS = 33.9 mm, and that e. for the axial length LFS of the wall (5) of the flexspline (3) the following applies: LFS < IDFS / 2.05, in particular LFS < IDFS / 2.16 or LFS < IDFS / 3.35, and that i. the oval shape of the wave generator insert (8) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin < | R(φ) | < Hmax, where Hmin = 12.830 mm and Hmax = 12.838 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k ∈ ℤ}, the following holds: | R(φ) | > c, where c = 12.549 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: | R(φ) | < d, where d = 12.22 mm, and / or ii. that the radially flexible rolling bearing (7) has a cross-sectional height Sh in the direction φ=0 and a cross-sectional height Sn in the direction φ=π / 2 and that the oval shape of the radially flexible rolling bearing (7) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin + Sh < | R(φ) | < Hmax + Sh, where Hmin = 12.830 mm and Hmax = 12.838 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k E ℤ}, | R(φ) | > c+(Sh+Sn) / 3, in particular | R(φ) | > c+(Sh+Sn) / 2.6 or | R(φ) | > c+(Sh+Sn) / 2.3, where c = 12.549 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: | R(φ) | < d+Sn, where d = 12.22 mm.

The application discloses a high-load-bearing bearing radial connection structure for releasing large impact torque, and belongs to the technical field of bearing connection, which comprises an inner supporting fixed ring, an outer supporting movable ring, a bearing, an inner stop ring and an outer stop ring. A large interference fit is adopted between a bearing outer sleeve ring and the outer supporting movable ring to form a rigid connection surface, and a small interference fit is adopted between a bearing inner sleeve ring and the inner supporting fixed ring to form a flexible connection surface. The total interference amount reduces the initial play of the bearing to the working play, so that reliable load transmission under normal working conditions is ensured. When the impact torque exceeds the friction torque of the flexible connection surface under the jamming working condition, relative sliding is generated between the inner sleeve ring and the inner supporting fixed ring, the rolling bearing is converted into a sliding bearing, the emergency stop time is delayed, the impact torque peak value is reduced, and structural damage is avoided.

This invention relates to rolling elements for rolling bearings, rolling bearings, and bearing assemblies. The rolling element (100) includes: a rolling element body (11) having a receiving space; a wireless power supply module for generating electrical energy based on the movement of the rolling element; and a controller function module (16) for monitoring at least one physical operating parameter, wherein the wireless power supply module and the controller function module are arranged adjacent to each other within the receiving space along the axial direction of the rolling element and are electrically connected to each other, wherein the wireless power supply module includes a generator (12) having a first component (121) and a second component (122) arranged coaxially and rotatable relative to each other, the first component being fixed relative to the rolling element body, and the second component having a mass block (14) arranged offset from the rotation axis of the generator. The rolling bearing includes an inner ring (200), an outer ring (300), and the aforementioned rolling element. The bearing assembly includes the aforementioned rolling bearing and a signal receiving and transmitting device.

A supply device for supplying a lubricant to at least one rolling bearing or at least one gear in a transmission housing includes a lubricant channel having at least two path segments. The at least two path segments are arranged at an angle to one another in order to circumvent an obstacle within the transmission housing. The lubricant channel may have a first path segment and a second path segment, and the first path segment and the second path segment may form an L-shape.