229results about "Machine bearings testing" patented technology

This disclosure provides a method for assessing the health status of bearings. The method includes: receiving multimodal data and prompting information about the bearing; performing feature extraction on the multimodal data using a first set of agents to generate a feature set about the multimodal data; performing a health assessment on the bearing using a second set of agents based on the feature set and prompting information about the multimodal data to generate multiple health assessment results about the bearing; and combining the multiple health assessment results using a third set of agents to generate a health assessment report about the bearing. According to this bearing health status assessment method, users can input multimodal data to perform bearing health status assessments, thereby improving the flexibility of the bearing health status assessment method. Furthermore, the bearing health status assessment method of this disclosure, by leveraging the reasoning capabilities of a large language model, can better understand user questions, thereby providing better maintenance suggestions and other outputs.

The embodiment of the invention provides a health assessment method for train bearings. The health assessment method comprises the steps that a bearing temperature data set collected from a plurality of bearings of a train during the travel of the train and an environment temperature data set around the train during the travel of the train are obtained; performing feature extraction on the bearing temperature data set to generate a first temperature feature set; calculating a difference value between each piece of bearing temperature data in the bearing temperature data set and corresponding environment temperature data in the environment temperature data set to generate a first temperature difference value set, and executing feature extraction on the first temperature difference value set to generate a second temperature feature set; and based on at least one of the first temperature feature set and the second temperature feature set, generating an evaluation result of the health state of each bearing in the plurality of bearings.

The application relates to a water pump testing device and method, and relates to the technical field of water pumps.The device comprises a rack, a testing box, a simulation mechanism, a testing mechanism and a driving mechanism are arranged on the rack, the testing mechanism is located in the testing box, the testing mechanism comprises a testing shaft and a fixing assembly, the fixing assembly is used for fixing a bearing, the driving mechanism is used for driving the testing shaft to rotate, and the simulation mechanism is used for providing a simulation environment in the testing box.The application has the advantages that the performance of the water pump in a hot and humid environment can be detected.

The present application relates to the field of bearing test, in particular to bearing raceway surface quality and grease matching characteristic test device. The device comprises a workbench, the workbench is provided with a driving shaft, the driving shaft is provided with a sleeving section for sleeving the bearing on the driving shaft and synchronously rotating the inner ring of the bearing and the driving shaft, the workbench is provided with a fixing structure outside the radial direction of the driving shaft for fixing the outer ring of the bearing at the sleeving position of the bearing, the workbench is provided with a vibration sensor for monitoring the vibration signal of the bearing, a noise sensor for monitoring the noise signal of the bearing, and a stick-slip signal sensor for monitoring the stick-slip signal of the bearing, and the sensors collect signals when the driving shaft drives the inner ring of the bearing to rotate. The collected signals are used to establish a mathematical model to provide theoretical support for the manufacturing process of the bearing and the selection of the grease, so as to ensure the mutual matching of the surface quality of the bearing and the grease, and further reduce the vibration and noise generated by the bearing under high-speed working condition.

The present application discloses a bearing fault diagnosis method and system based on knowledge enhancement and multi-path distillation, which relates to the fields of intelligent operation and maintenance and industrial equipment health management. The method includes obtaining sensor signals and visual image data of the bearing operation; based on an asynchronous dual-channel architecture, correspondingly extracting signal features of the sensor signals and image features of the visual image data, and performing time synchronization on the signal features and the image features; using a multi-modal bottleneck Transformer module to fuse the synchronized signal features and the synchronized image features; based on a maintenance knowledge graph dynamically constructed from a bearing maintenance manual, combining a text generation model to map the fused features to a semantic space and generate a fault diagnosis report. The present application can improve the recognition accuracy, real-time performance and interpretability of diagnosis results of bearing faults.

The utility model discloses a kind of test device and test system of elastic bearing mechanical property, belong to elastic bearing performance test technical field, for solving the test device structure of elastic bearing mechanical property Complex, bulky, high cost and the problem of cumbersome test process. The test device of elastic bearing mechanical property of the utility model, including mounting, bending moment loading unit and axial compression unit;The two ends of mounting are used to respectively connect the inner ring end of two elastic bearings;Bending moment loading unit includes pivot, pivot's axis line and the axis line of two elastic bearings vertical intersection, and one end of pivot is fixedly connected with mounting;Axial compression unit is used to exert bidirectional axial static compression load to the outer ring end of two elastic bearings. The test device and test system of the utility model reduce the complexity and cost of test device and test system, improve the reliability and test efficiency of test device.

This application discloses a testing device, testing method, and processing technology for use in a liquid nitrogen environment, relating to the field of cryogenic testing technology. The device includes a liquid nitrogen tank for providing a liquid nitrogen environment; a testing turntable disposed within the liquid nitrogen tank for placing the test piece; a driving mechanism including a driving motor for driving the testing turntable to rotate; and a cryogenic protection device including a protective shell and a sealing connecting sleeve disposed within the protective shell, forming an isolation cavity between the protective shell and the sealing connecting sleeve. The sealing connecting sleeve is used to install the driving end of the driving motor, thus protecting the driving end of the driving motor. In a liquid nitrogen testing environment, the protective shell, the pressure barrier formed by the isolation cavity, and the sealing connecting sleeve provide multiple layers of protection for the driving motor, reducing the possibility of liquid nitrogen leakage and water vapor infiltration into the driving motor.

The application provides a kind of friction torque measuring tool of centripetal roller bearing under eccentric load state, including motor, sensor and test shaft, the test shaft is arranged on the inner ring of the bearing to be measured, the spline part is provided at one end of test shaft, the motor and sensor are sequentially connected at spline part, it further includes mounting seat and limiting seat, the mounting seat is formed by assembling, and mounting seat can be loaded in the outer ring of the bearing to be measured, the other end of test shaft is rotatably provided with extension, the end of extension is used to connect the load of loading piece, and extension is slidably connected on limiting seat, and limiting seat forms anti-rotation cooperation with limiting seat. In view of the deficiency of prior art, the application provides a kind of friction torque measuring tool of centripetal roller bearing under eccentric load state, which is simple to operate and stable in measurement.

The application provides a dynamic load determination method, comprising: obtaining test data, the test data being determined based on a dynamic test of a structure model corresponding to an application structure; obtaining simulation data, the simulation data being determined through simulation calculation based on a simulation model corresponding to the structure model; fitting the test data and the simulation data into quadratic expressions about vibration frequencies respectively, and determining a linear relationship between the test data and the simulation data; and determining a dynamic load of the application structure based on simulation strain data of the application structure and the linear relationship.

This invention discloses a method for diagnosing unknown faults in blower bearings based on relative attributes, belonging to the field of fault diagnosis technology for wastewater treatment equipment. The method first calculates the relative attribute values ​​of known fault samples and constructs a standard relative attribute description matrix containing both known and unknown categories by combining expert prior knowledge and fuzzy reasoning. Then, it trains a random forest regression model that integrates a multi-constraint cross-domain alignment mechanism, achieving the mapping of fault features to the attribute space through attribute alignment loss, unknown class prototype convergence loss, and cross-domain structure alignment loss. Finally, it uses the trained random forest regression model to predict the attributes of unknown fault samples and completes fault diagnosis by matching similarity with the standard attribute matrix. This invention solves the problem of accurate diagnosis of unknown faults in blower rolling bearings in wastewater treatment processes due to a lack of samples, providing reliable technical support for the safe, stable, and energy-efficient operation of blower systems in wastewater treatment processes.

This invention discloses a method and apparatus for extracting fault features of rolling bearings under varying operating conditions. First, vibration signals and rotational speed pulse signals are simultaneously acquired. Second, angular domain resampling is performed using order-ratio tracking technology to stabilize the signals and eliminate frequency ambiguity. Then, a multi-scale L-kurtosis blind deconvolution framework is constructed, and the optimal filter is extracted to enhance the impact component through segmentation, filter solving, phase alignment, and singular value decomposition fusion. Next, an adaptive generalized Gaussian sparse operator is introduced to calculate a hard threshold to suppress residual noise and retain fault sidebands. Finally, fault diagnosis is completed through squared envelope order spectrum analysis. This invention solves the problem of fault identification under speed fluctuations and noise interference, effectively improving the accuracy and robustness of diagnosis.

The application relates to the field of intelligent monitoring, and discloses a built-in intelligent flower drum maintenance monitoring system, which comprises a hollow flower drum shaft, a rotating shell assembly, an intelligent monitoring module, a light-transmitting communication end cover and a magnetic triggering assembly. The rotating shell assembly is arranged outside the stationary hollow flower drum shaft, and the magnetic triggering assembly is arranged on the inner wall of the rotating shell assembly. The intelligent monitoring module is fixed in the inner cavity of the shaft, and is integrated with a micro control unit, a Hall sensor and an indicator lamp; the Hall sensor senses the magnetic field penetrating the shaft wall surface when the magnetic triggering assembly rotates and outputs a pulse; the micro control unit calculates the mileage and determines the maintenance state according to the pulse cumulative quantity, drives the indicator lamp to emit light, and the light is transmitted to the outside through the light guide structure of the light-transmitting communication end cover. Through the built-in non-contact detection and the end cover light guide structure, the application realizes accurate wear monitoring and visual interaction of the flower drum in the whole life cycle, and improves the protection and durability of the system.

This invention relates to the field of bearing fault diagnosis technology, specifically to a bearing fault diagnosis method based on neural networks and multi-criteria preference consensus. The method includes: data acquisition and feature extraction, data preprocessing, matching a fault diagnosis model, preliminary diagnosis and probability generation, final diagnosis and probability generation, and bearing state decision-making. This invention provides a multivariate decision-making auxiliary model that integrates physical marginal value functions and neural network attention mechanisms, combined with a reinforcement learning-driven consensus-building process, to achieve adaptive optimization of multi-expert fault diagnosis results. This not only solves the problems of existing bearing fault diagnosis methods being unable to handle complex working conditions, lacking physical interpretability, relying heavily on single decision-making patterns, and using static weight allocation, but also improves the accuracy, robustness, and interpretability of bearing fault diagnosis, achieving high-precision, low-round group fault diagnosis.

The application relates to the technical field of vehicle testing, in particular to a testing method and device for the rotating torque of a hub bearing, wherein the method comprises the following steps: collecting a first test result of at least one rotating speed of the hub bearing before durability test under different temperature conditions; then, simulating the actual vehicle state by using preset parameters to control a test vehicle, so as to conduct a durability test on the hub bearing, and collecting a second test result of at least one rotating speed of the hub bearing before durability test under different temperature conditions; and substituting the first test result and the second test result into a preset rotating torque formula to obtain a rotating torque test result of the hub bearing. According to the embodiment of the application, the rotating torque test result of the hub bearing can be obtained by calculating based on the test results before and after the durability test, the test result of the rotating torque of the hub bearing is combined with the test data of different temperatures, the test result is fitted to the actual driving scene, the accuracy and objectivity of the test result are improved, and the design standard of the rotating torque of the hub bearing is improved to reduce the rolling resistance, so that the application is more practical.

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.

This invention discloses a rolling bearing fault detection method based on synchronous time difference of dual optical encoders. The method acquires pulse signals from an external encoder and a motor encoder respectively, obtains the zero-crossing times of the two sets of pulse signals using the zero-crossing time method, and performs angle downsampling processing on the zero-crossing time of the motor encoder. A cross-correlation algorithm is used to compensate for the delay of the zero-crossing times of the external encoder and the downsampled zero-crossing times of the motor encoder, reconstructing the zero-crossing times of both as angle-time signals. The two reconstructed angle-time signals are then differentially processed to obtain the residual signal. The residual signal is biased and compensated, and then inverted to construct an instantaneous angular velocity signal. Order spectrum analysis is performed on the ω signal to extract bearing fault features. This invention can solve the problem of rolling bearing fault feature signals being masked by velocity trend components and quantization errors, enabling rolling bearing fault detection under variable speed conditions.

A system for monitoring a rolling element bearing including the rolling element bearing (1) and at least three temperature sensors. The at least three temperature sensors include a first temperature sensor (2) positioned in the environment of the rolling element bearing (1) to detect an environmental temperature; a second temperature sensor (3) positioned at a highly loaded region (9) of the rolling element bearing (1), preferably adjacent to a rolling surface of the rolling element bearing (1), to detect a load temperature; and a third temperature sensor (4) positioned at a less loaded or unloaded region (10) of the rolling element bearing (1), preferably adjacent to a rolling surface of the rolling element bearing (1), to detect an idling temperature. The system includes an evaluation device (5) that is configured to evaluate the state of the rolling element bearing (1) based on detected temperatures.

The utility model discloses a bearing processing test platform, including hardness tester body and detection disc, the lifting rod top of hardness tester body is fixed with detection disc, still include axle limiting mechanism, the axle limiting mechanism includes tray, fixed groove, fixed board, core hole, T -shaped hole, leg plate, limiting board, edge strip groove, V -shaped groove and vertical lug plate, the top of detection disc is equipped with the fixed groove for clamping fixed board, and the fixed board is fixed in the lower disc surface of tray, the tray surface between fixed board is equipped with T -shaped hole, and the detection disc surface of existing hardness detector body is provided with axle limiting mechanism and is composed of bearing processing test platform, and the combination design of vertical lug plate and the resistance bolt of axle limiting mechanism allows the bearing placed on the tray surface to push to the V -shaped groove of limiting board and carries out the limit clamp, effectively guarantees the compression stability of bearing in the hardness test process, thereby guaranteeing that bearing can be firmly limited and clamped and carries out the stable test of bearing hardness.

The application relates to a high-precision measurement method for the inner ring raceway parameters of a large double-row tapered roller bearing based on a three-coordinate measuring machine, and relates to the technical field of double-row tapered roller bearing inner ring raceway measurement. The application is used to solve the problem of low precision of the traditional measurement method for the inner ring raceway of a large double-row tapered roller bearing, thereby leading to low measurement efficiency. The application improves the measurement precision and efficiency. Since the measurement is non-contact, the measurement error caused by plastic cutting is reduced. The measurement method can realize automatic measurement, the machine automatically calculates the results, the measurement results are more accurate, and the measurement efficiency is higher. The measurement method can be applied to the measurement of various types of bearings, effectively improving the universality, and the measurement efficiency and precision are obviously improved. The application is suitable for accurate measurement of the inner ring raceway parameters of a double-row tapered roller bearing.

The application relates to a bearing lubrication performance measuring device under outer ring driving, and belongs to the technical field of lubrication experiments. The device comprises an operation platform, a driving device, a loading device, a testing device and a torque acquisition system. The driving device is connected with the testing device through a shaft coupling, drives the testing sleeve to rotate to simulate the driving working condition of the bearing outer ring; the loading device applies and measures the load on the testing bearing through a thrust bearing, a pressure sensor and a butterfly spring; the torque acquisition system acquires torque data in the testing process in real time. The testing main shaft and the loading shaft system are internally provided with oil channels, lubricant can be supplemented in time, and the butterfly spring in the supporting sleeve plays the roles of buffering and keeping the load stable. The device can truly simulate the high-speed rotating working condition of the bearing outer ring, synchronously measure torque, load and rotating speed parameters, the platform level can be adjusted through adjusting screws, the bearing pre-tightening force is adjustable, the testing bearing is convenient to replace, and the device is suitable for the testing and evaluation of the lubrication performance of space bearings.

This utility model relates to the field of bearing testing technology and discloses a bearing capacity testing device for high-sealing double-row cylindrical roller bearings. It solves the problem that current bearing capacity testing devices are inconvenient to fix according to bearings of different sizes, resulting in poor practicality. The device includes a test base, with a support plate connected to one side of the upper end. One end of the support plate is connected to the transmission device body, and a protective cover is snapped onto the lower side of the support plate. A circular plate is rotatably connected to one end of the support plate, and a limiting component is connected to one end of the circular plate. Through the setting of the limiting component, the pull rod drives the rotating rod to rotate. Under the meshing transmission of the gear and the toothed disc, multiple arc-shaped plates move in all directions, increasing the fixing diameter and enabling rapid fixing of bearings of different sizes. Compared with a single fixing method, it is suitable for fixing bearing bodies of different specifications and sizes, improving versatility.

The utility model relates to bearing technical field especially is involved in a kind of spherical plain bearing with on-line monitoring device, including bearing outer ring and the bearing inner ring rotationally arranged in bearing outer ring, further include the monitoring device for monitoring bearing inner ring outer surface wear, installation cavity is opened in bearing outer ring, monitoring device is arranged in installation cavity, monitoring device includes mounting seat, monitoring ball, fixed contact and the movable contact matched with fixed contact, monitoring ball rotationally arranged in mounting seat, and monitoring ball protrudes from mounting seat and can contact with bearing inner ring, mounting seat and bearing outer ring elastically connect, so that monitoring ball contacts bearing inner ring, fixed contact and bearing outer ring fixed connection, movable contact is arranged on mounting seat, movable contact can contact with fixed contact after moving on mounting seat, and the contact of movable contact controlled by elastic movement monitoring ball directly triggers wear overrun signal, and monitoring ball and bearing inner ring directly contact, eliminate indirect measurement error.

The present invention relates to a real environment simulation system for testing grounding components for an electric vehicle, which is configured to test grounding components used in a motor mounted on an electrically driven hybrid vehicle or electric vehicle under the same environmental conditions as an actual electric vehicle. The present invention provides a real environment simulation system for testing grounding components for an electric vehicle, the system comprising: a base frame; a test apparatus unit, mounted on an upper portion of the base frame, for testing a grounding component; a chamber unit including a test chamber covering the grounding component to be tested by the test apparatus unit and defining a predetermined space, and a main chamber, connected to the test chamber, for providing a predetermined environmental condition to the test chamber; a component test unit fixedly mounted inside the test chamber, onto which the grounding component is mounted; a control unit including a controller for controlling operations of the test apparatus unit and the chamber unit; and a distribution box for supplying or cutting off power to the test apparatus unit, the chamber unit, and the control unit.

A universal load device (100) comprises an adapter ring (10), a core ring (20) and an additional ring (30), the sum of the weights of which is utilized to build the load required for a rotating apparatus (2) in application. Wherein the adapter ring (10) is used for reliably connecting a core ring (20) to a rotary part (21) of a rotary device (2), and the core ring (20) is used for carrying an additional ring (30). The adaptive ring (10), the core ring (20) and the additional ring (30) form respective individual ring series, and the individual ring series of the three can be combined to form a series of loads required by different applications. The three individual ring series can achieve the purpose of one machine with multiple purposes through few groups, the universal load device can replace a traditional load device with one machine with one purpose, and therefore the universal load device has the advantages of cost performance and practical value. In addition, the universal load device is easy to use, not only flexible in assembly, but also large in adjustment freedom degree.

A fault diagnosis method based on feature enhancement via linear transformation is provided, comprising collecting signal samples from an experiment table for a rotating device, and constructing a tra