433 results about "Friction torque" patented technology

The invention relates to a mechanical arm friction disturbance identification and suppression method based on a vibration signal. The method is suitable for high-precision control of a multi-degree-of-freedom flexible joint robot system. The method comprises the following steps: firstly, designing a five-order Fourier excitation track meeting a zero boundary condition to excite system dynamic response; then constructing a structural dynamics regression model based on a Newton-Euler method, extracting a minimum parameter set, and obtaining a structural item output torque; aiming at a structural modeling residual error, introducing a breadth learning system (BLS) to carry out nonlinear identification on non-structural disturbance, and carrying out global optimization on network structural parameters by adopting a particle swarm optimization (PSO) algorithm; and finally, fusing the structure item and the disturbance item to form total joint torque estimation for realizing feed-forward compensation control. The method has the advantages of being high in identification precision, high in real-time performance, high in data utilization rate, excellent in robustness and the like, nonlinear friction torque disturbance generated by the mechanical arm under the vibration interference condition can be effectively restrained, the dynamic tracking performance and control stability of a system are improved, and good engineering adaptability and popularization value are achieved.

The invention discloses a modular mechanical arm actuator additive fault optimal fault-tolerant control method and device of a zero sum differential game, and relates to the field of robot control algorithms, and the method comprises the steps: representing a nonlinear damping characteristic through a joint friction torque, describing the dynamic interaction of multiple joints through a cross-linking coupling item, and determining the optimal fault-tolerant control of the additive fault of the modular mechanical arm actuator; a dynamical model containing faults is constructed. And uncertain items in the model are updated online by adopting a radial basis function neural network identifier, so that the model precision is improved. A performance index function is constructed based on position errors, actuator faults and controller input are regarded as two opposite parties of a zero and differential game, the performance index function is approximated through a single evaluation neural network, a Hamiltonian-Jacobi-Axaxi equation is approximately solved, and an optimal fault-tolerant control strategy is obtained. According to the method, the game theory is combined with the neural network, the dynamic unknown fault problem of the modular mechanical arm is effectively solved while the system energy consumption integration is reduced, and real-time optimal control over the modular mechanical arm is achieved.

The invention provides a method for monitoring the tightening state of a screw on line, which comprises the following steps of: based on segmented characteristic analysis of a torque-angle (T-theta) curve, refining a standard tightening process into three stages: a screwing-in angle stage, a friction torque stage and a tightening torque stage, and simultaneously extracting characteristic quantity for each stage, and establishing a judgment rule or model to detect whether the thread is screwed in or not, whether slipping / impacting occurs or not, whether expected pre-tightening force is reached or not, whether the bottom surface is jacked or not, whether the thread is damaged or broken or not and the like. And finally, stage judgment is gradually updated along with the sampling points in the tightening process. According to the method, specific physical events in the process can be identified instead of final value abnormity, abnormal tightening can be predicted and stopped before tightening is finished, reworking and damage are reduced, misjudgment is reduced through in-segment feature analysis, continuous improvement is facilitated, and threshold values and a judgment model are continuously optimized through historical waveform learning.

The invention discloses a ball screw pair loading test device, and relates to the technical field of ball screw testing. The driving piece is used for driving the tested lead screw to rotate and adopts an integrated headstock structure integrated at one end of the bed body; and the loading piece is used for providing an axial load for the tested lead screw, adopts a dual-motor top-to-top loading structure arranged at the other end of the bed body, and is matched with the integrated headstock structure to form a unified mechanical standard. According to the invention, an integrated headstock structure of the driving piece and a dual-motor opposite-top loading structure of the loading piece are matched to form a unified mechanical standard, a friction torque measurement state and an axial force measurement state are rapidly switched through a switchable connection structure, a to-be-tested lead screw only needs to be clamped once, multi-parameter test can be completed, the test efficiency is effectively improved, and the test cost is reduced. And meanwhile, positioning errors caused by multiple times of clamping are avoided, it is ensured that all parameters are based on the same reference, and data relevance is higher.

The invention discloses an industrial robot joint friction parameter compensation method based on machine vision. The three-dimensional pose information of the target feature points is extracted based on the image sequence, the tail end position and the pose change are accurately captured, the actual driving force is obtained, and a dynamic comparison mechanism between the theoretical driving force and the actual driving force is established, so that the state deviation is extracted, the load torque and the friction torque are separated out, and the driving precision is improved. Compared with a traditional control strategy depending on a fixed friction model coefficient, the dynamic friction compensation torque is obtained in a real-time image obtaining mode, non-linear friction interference changing along with time, temperature and abrasion can be tracked and compensated in a self-adaptive mode, and the method has the advantages that the dynamic friction compensation torque is obtained in a real-time image obtaining mode. The problems that an existing model lags behind and is large in compensation error are solved, and the friction estimation precision and the compensation capacity are effectively improved.

The invention discloses an industrial robot joint friction parameter compensation method based on machine vision. The three-dimensional pose information of the target feature points is extracted based on the image sequence, the tail end position and the pose change are accurately captured, the actual driving force is obtained, and a dynamic comparison mechanism between the theoretical driving force and the actual driving force is established, so that the state deviation is extracted, the load torque and the friction torque are separated out, and the driving precision is improved. Compared with a traditional control strategy depending on a fixed friction model coefficient, the dynamic friction compensation torque is obtained in a real-time image obtaining mode, non-linear friction interference changing along with time, temperature and abrasion can be tracked and compensated in a self-adaptive mode, and the method has the advantages that the dynamic friction compensation torque is obtained in a real-time image obtaining mode. The problems that an existing model lags behind and is large in compensation error are solved, and the friction estimation precision and the compensation capacity are effectively improved.

The invention relates to the technical field of petroleum and natural gas drilling engineering, and discloses a deep well geological exploration tunneling parameter control system and method, and the system comprises a signal collection and synchronization module which collects drilling parameters and aligns timestamps; the initialization and modeling module is used for calculating fluid transmission time lag and blade skim-over frequency; the active disturbance generation module generates a target bit pressure instruction superposed with sine disturbance to drive load application; the two-channel feature extraction and verification module aligns the historical torque and the current pressure according to time delay and calculates the confidence coefficient in combination with the frequency; the adaptive decision and closed-loop control module uses the confidence coefficient to correct the gain and update the reference bit pressure to form a closed loop. A dual-channel verification framework based on fluid-structure interaction transmission time lag and blade characteristic frequency is constructed, the covering effect of long-distance drill column friction torque on real cutting torque in deep well operation is effectively stripped, and it is ensured that a control system only responds to effective rock breaking action.

The invention provides a water-lubricated bearing performance testing device and method, relates to the field of bearing testing, and aims to solve the problem that a current water-lubricated bearing testing machine is difficult to realize real-time parameter acquisition during loading, a radial loading assembly is arranged corresponding to a stressed bearing, and an axial loading assembly acts on the tail end of a main shaft; a loading position avoids a sensor mounting area, interference of loading action on sensor acquisition precision is avoided, the water tank wraps the second bearing and the stress bearing, and the first bearing and the torque sensor are located outside the water tank, so that water lubrication environment simulation is guaranteed, and torque and temperature signal acquisition is prevented from being affected by water. When the radial loading assembly applies a radial load to the stress bearing, the load is uniformly transmitted to the first bearing and the second bearing on the two sides through the sleeve, at the moment, the temperature sensor collects the temperature rise of the first bearing, the acceleration sensor collects the vibration of the second bearing, and the torque sensor synchronously collects the friction torque. And radial loading and synchronous acquisition of multiple parameters are realized.

The utility model provides a bearing friction torque measuring instrument, relates to the technical field of measuring devices, and aims to solve the problems that a conventional bearing friction torque measuring instrument lacks a structure for assisting in adding lubricating oil, and the lubricating oil needs to be added into a bearing manually during detection, so that the labor capacity of workers is increased. The mounting mechanism comprises a main body, a mounting frame and a fixing hole, and a circular table-shaped structure is arranged at the upper end of the main body; and the mounting frame is fixedly mounted at the upper end of the main body. When the fixing part drives the inner end of the bearing to extend into the bearing part, the baffle ring limits the conduction part, and along with continuous descending of the fixing part, a round hole transversely formed in the conduction part can be communicated with a leakage hole, so that lubricating oil in a storage groove enters a communicating groove through the leakage hole and flows out through a round hole vertically formed in the bottom of the communicating groove, and the lubricating oil is stored in the storage groove. Therefore, automatic lubrication of the bearing is realized, and lubricating oil does not need to be manually added into the measured bearing.

The utility model relates to a rolling bearing friction torque testing device which comprises a driving unit, a diaphragm coupling, a supporting shaft system, a heating ring, a high-low temperature box heat preservation sleeve, a high-low temperature box, a test bearing friction torque testing assembly and a rack. The test bearing friction torque test assembly comprises a test bearing outer bush, a test bearing, a test connecting shaft, a test bearing inner ring gland, a test bearing outer ring gland, a guide rod, a miniature force sensor, a force sensor fixing frame and a high and low temperature box base. The friction torque testing device is ingenious in design, simple in structure, convenient and practical, can simulate testing of starting friction torque and operation friction torque of the rolling bearing in high and low temperature environments, fills the blank of friction torque measurement of the rolling bearing in the high and low temperature environments in the bearing industry, enhances testing technical means and methods of the rolling bearing in high and low temperature aspects, and improves testing efficiency. Compared with the prior art, the device has good market prospect and development space.

A robot control method includes a collision detection method for detecting an external force by subtracting a kinetic torque and a friction torque calculated value obtained by an inverse kinetic calculation of the robot from a torque output from a motor to a decelerator in a robot driven by the motor via the decelerator. When the detected value of the external force is higher than a predetermined threshold value, it is determined that the robot has collided. In the robot control method, when it is determined that there is no collision, a friction estimated filter value obtained by smoothing a friction torque estimated value used for setting a friction torque calculation value is updated on the basis of a friction estimated filter value prior to a predetermined time. The friction estimation filter value before and after the update is stored as a friction estimation stored value. When it is determined that there is no collision, the friction estimation filter value is returned to the friction estimation saved value before update.

The present invention discloses a simplified multi-joint manipulator friction parameter identification method based on the Stribeck model. The method process is as follows: the multi-joint manipulator system is split into multiple single-joint subsystems; a friction force model of each subsystem is constructed; for each subsystem, the driver is used to drive the subsystem to sample its angle, angular velocity, and torque; the sampled angular velocity is filtered, and the angular acceleration is obtained using a Butterworth filter; the angle, angular velocity, torque, and angular acceleration are substituted into the model of the single-joint subsystem to calculate the friction torque, and the friction parameters are identified based on the least squares method; the obtained friction parameters are used as the friction model parameters of the multi-joint manipulator system. The simplified multi-joint manipulator friction parameter identification method based on the Stribeck model proposed in the present invention can reduce the computational complexity of the multi-joint manipulator system friction parameter identification and can provide accurate modeling of the manipulator friction.

The invention discloses a ball screw support bearing friction torque performance test tool, which relates to the technical field of friction torque detection and comprises a base platform, a bearing clamping mechanism and a torque detection mechanism. The base platform is provided with a test workbench, the bearing clamping mechanism is fixed on the workbench, the torque detection mechanism comprises a vertical adjustment unit, a driving sensing part and an inner ring locking clamp, and the vertical adjustment unit controls the vertical displacement of the driving sensing part and the inner ring locking clamp; and the driving sensing part drives the bearing inner ring to rotate through a motor and detects the dynamic friction torque. The problems that in the prior art, due to the high starting torque caused by the time-varying characteristic of lubricating grease, an overload phenomenon is likely to happen to a detection system when a high-precision sensor conducts detection are solved. The method has the advantages that overload protection is started through the preset threshold value, the high-precision torque sensor is prevented from being damaged by the low-temperature starting torque peak value, and meanwhile the overtravel torque value is quantified synchronously.

The invention belongs to the field of failure analysis of bearings, and discloses a fatigue life analysis method of a wind power main bearing based on thermal-mechanical coupling. In order to consider the influence of pre-tightening on the service life of the bearing, the method takes the pre-tightening force of the bearing as a starting point, and gradually establishes a relational expression between pre-tightening and a series of static characteristics such as contact deformation, contact load, fatigue life and the like by utilizing an analytical method; meanwhile, the friction torque is introduced, the finite element analysis method is used for solving the influence of thermal deformation on the static characteristics of the bearing, the influence is substituted into the static characteristic relational expression, and finally the service life analysis method of the bearing based on thermal-mechanical coupling is achieved. Compared with the conventional service life analysis method, the fatigue service life analysis method disclosed by the invention has the advantages that the thermal deformation of the bearing caused by friction is additionally considered, so that the analysis is more comprehensive, and the precision of the service life analysis of the bearing is further improved.

The invention discloses a kinetic parameter identification method, device and equipment of a collaborative robot considering uncertain factors, and relates to the technical field of robots, the method comprises the following steps: constructing an improved kinetic friction model considering uncertain factors and multi-factor coupling, and obtaining friction torques borne by joints according to the model; constructing a kinetic equation; solving the kinetic equation to obtain a recursive expression; the collaborative robot is driven according to the excitation track, an output parameter matrix is obtained, the joint angular velocity of the collaborative robot is calculated according to the output parameter matrix and the recursion expression, and high-order terms of the joint angular velocity are calculated step by step; when the error of the expansion values of two adjacent orders is smaller than an iteration convergence coefficient, outputting the angular velocity; and judging a motion stage to which the angular velocity belongs according to the velocity judgment coefficient, and dividing a parameter identification stage according to a judgment result to realize segmented identification of the kinetic parameters of the collaborative robot. According to the method, the identification precision and calculation efficiency of the kinetic model are improved.

The invention relates to the technical field of hub bearings, in particular to a hub bearing with a variable-curvature raceway. The invention discloses a wheel hub bearing with a variable-curvature raceway. The wheel hub bearing comprises an outer ring unit, an inner ring unit and a plurality of balls, the outer ring unit comprises a bearing outer ring; an outer ring inner side channel and an outer ring outer side channel are formed in the bearing outer ring; the inner ring unit comprises an inner ring flange and a matched inner ring; the inner ring flange is provided with a flange plate channel; the matching inner ring is provided with an inner ring channel; one part of the balls are positioned between the inner ring channel and the inner side channel of the outer ring, and the other part of the balls are positioned between the flange plate channel and the outer side channel of the outer ring; wherein the axis of the bearing outer ring is located in the reference section; in the reference cross section, the outer ring inner side channel is provided with a first cross section line; the first section line comprises a first curve and a second curve; the curvature radius of the first curve is greater than that of the second curve; therefore, the problem of how to consider the friction torque and the axial bearing capacity to prolong the service life of the hub bearing is solved.

The utility model provides a double-row tapered roller bearing with low energy consumption and long service life. The bearing comprises two inner rings, two sealing rings, two outer flanges, two retainers, an outer ring and two rows of tapered rollers. Compared with an existing bearing, the bearing has the advantages of being good in assembling performance, compact in structure, large in load, low in noise, low in driving torque, ultralow in temperature rise, ultralow in friction torque, ultralow in cost, integrated, super-energy-saving, super-long in mileage, free of maintenance, super-long in service life, high in strength, rigidity, reliability and stability and the like, the efficiency of a transmission system is remarkably improved, and the service life of the transmission system is prolonged. The energy consumption is obviously reduced; the energy is saved; the environment is protected.

The invention discloses a bidirectional crescent upstream pumping groove end face mechanical seal which comprises a sealing ring. Different from the prior art, a plurality of upstream pumping groove groups and downstream pumping groove groups are arranged on the sealing surface of the sealing ring, the upstream pumping groove groups and the downstream pumping groove groups are alternately distributed on the sealing ring, and a sealing weir is formed between each upstream pumping groove group and the adjacent downstream pumping groove group. The crescent upstream groove structure can enable a fluid medium to be leaked from the upstream side of the downstream groove, on one hand, leakage of the fluid medium to the inner diameter side can be reduced, the sealing performance is improved, on the other hand, viscous shear heat of fluid on the sealing face can be dissipated in time, and small temperature rise of the sealing face is maintained. Meanwhile, a fluid medium can flow in a wave shape along the crescent flow channel in the adjacent upstream groove and downstream groove, a layer of stable fluid film is maintained between the sealing faces, the lubricating state of the sealing faces is improved, and temperature rise and friction torque of the sealing faces are reduced.

A method and system for joint torque compensation in a remote teleoperated arm is disclosed. For each joint of the teleoperated arm, a friction torque prediction model, nominal dynamic equation, and compensation residual prediction model are constructed using the arm's historical joint command torque, joint angular velocity, and joint temperature. During each real-time control cycle of the teleoperated arm, real-time compensation calculations are performed using the constructed models to obtain a reference feedforward compensation torque. The end effector force deviation of the teleoperated arm is calculated and mapped to a joint torque increment. A feedback fine-tuning compensation torque is generated based on the joint torque increment. The total compensation torque is calculated based on the reference feedforward compensation torque and the feedback fine-tuning compensation torque. The final torque command for each joint servo driver is calculated based on the total compensation torque. This invention systematically solves the problems of model accuracy, dynamic response, and disturbance suppression, thereby achieving a truly high-fidelity force perception and presence.

The invention relates to a method for measuring torque using a torque sensor integrated in a robot arm joint (17), comprising the following method steps: in a calibration step, measuring torque using the integrated torque sensor and determining the position, speed and acceleration of a rotating element of the joint during idle rotation of the joint, thereby obtaining training data; -in a training step, performing a linear regression analysis to obtain a correction function indicative of the intrinsic dynamics of the robot arm joint, where the correction function is a linear combination of at least four basis functions: i. At least one friction torque basis function comprising a first speed dependent sigmoid function and / or a speed dependent linear function; and ii. At least one torque ripple basis function comprising a first position dependent periodic function; and iii. At least one inertial basis function comprising a first acceleration dependent linear function; and iv. At least one torque offset basis function, which is a constant; -in an operational measurement step, measuring the torque using the integrated torque sensor under load conditions and obtaining a corrected torque value on the basis of the measured torque value and a correction function.

The invention relates to the technical field of wiring terminals, and discloses a combined wiring terminal which comprises a wiring box and a plurality of wiring holes formed in the front side of the wiring box, and further comprises a plurality of fixing parts which are all installed on the wiring box; the number of the anti-falling parts is multiple, and the multiple anti-falling parts are arranged on the front sides of the multiple wiring holes respectively; the number of the locking parts is multiple, and the multiple locking parts are arranged on the multiple anti-disengaging parts correspondingly; the fixing part comprises a fixing assembly, and the fixing assembly is installed on the junction box. Through the arrangement of the fixing part, the problems that in the using process of an existing wiring terminal, the friction torque of threaded connection between a fixing screw and a matched connecting piece is insufficient, self-rotation loosening is likely to happen due to external force such as vibration, the connection stability of the terminal and an electric wire is poor, the connection firmness is difficult to guarantee, and then poor contact is likely to happen are solved.

The application relates to the field of vehicle technology and discloses an all-terrain vehicle, which comprises wheels, a power source, a front axle assembly and an input shaft. The wheels comprise front wheels and rear wheels. The power source drives the wheels to rotate. The front axle assembly is connected with the front wheels. The input shaft is connected with the front axle assembly and the power source. The front axle assembly comprises a driven device, an output gear, a first connecting wheel, a second connecting wheel and a friction assembly. The driven device comprises a fixedly connected driven gear and an inner housing. The output gear drives the front wheels. The first connecting wheel is engaged with the output gear. The second connecting wheel is engaged with the inner housing. The locking mechanism can drive the friction assembly to switch between a compression state and a free state. When the friction assembly is in the free state, the friction resistance between the output gear and the driven device is smaller than that when the friction assembly is in the compression state. The friction torque of the friction assembly is increased, the assembly efficiency of the friction assembly is improved, and the size of the transmission assembly is reduced.

The application discloses a bearing starting friction torque measuring system and a measuring method thereof. The system comprises a machine table and a bearing tool. The machine table is provided with a pre-load device and a friction torque measuring device. The bearing tool can be connected to the pre-load device. The friction torque measuring device comprises a bearing driving turntable and a torque measuring device. The bearing driving turntable is provided with a tool mounting mechanism. The bearing tool after pre-load can be clamped on the tool mounting mechanism. The torque measuring device can be connected to the tool mounting mechanism. The application clamps and positions the bearing product to be measured by the bearing tool. The pre-load loading operation of the bearing can be completed on the pre-load device. The working condition of the bearing is simulated. The bearing tool after pre-load can be mounted and fixed on the tool mounting mechanism. The relative movement of the inner and outer rings of the bearing is formed to realize the measurement of the friction torque. The application has the advantages of simple operation and convenient detection and can meet the requirement of accurately measuring the bearing starting friction torque data in the laboratory.

The present application relates to a kind of friction torque testing device, belong to universal joint testing field, solve the problem that existing technology cannot effectively test the friction torque of universal joint.The present application includes base, clamping unit, measuring unit and control box, the clamping unit, measuring unit and control box are all fixedly installed on base, the clamping unit is used to clamp the universal joint to be tested, and also be used to adjust the test angle of universal joint;The measuring unit is oppositely arranged with clamping unit, and the measuring unit is used to test the friction torque of universal joint;Controller is provided in the control box, the controller is connected with measuring unit, is used to control the friction torque test that measuring unit carries out to universal joint, and exports test result.The present application realizes the effective friction torque test to universal joint, it is easy to operate, improves the production manufacturing efficiency of universal joint.

The invention discloses a power transmission line tower foundation bolt pre-tightening torque calculation method and device and a medium, and the method comprises the steps: calculating and obtaining the common parameters of a foundation bolt based on the calculation formula of the diameter of each thread of the foundation bolt and the height of the original triangle of the thread, and then calculating the pre-tightening torque of the foundation bolt through the thread mechanics theory; deriving a torque formula when the triangular thread pair is fastened and loosened so as to obtain a specified control value of the tensile stress; a foundation bolt pre-tightening torque calculation formula is obtained through derivation according to the friction resistance torque of the thread pair and the friction torque of the nut supporting end face, and is used for calculating and obtaining the pre-tightening torque values of 4.6-level, 5.6-level and 8.8-level foundation bolts. The novel calculation method for the pretightening torque of the 4.6-level, 5.6-level and 8.8-level foundation bolts can be used as a powerful support for calculation and design of the foundation bolts of the power transmission line, and a unified and definite torque value standard can be provided for construction of the foundation bolts of the power transmission line.

The invention discloses a mineral geological exploration device, which belongs to the field of mineral drilling, and comprises a drilling machine body, a vertical plate arranged on the drilling machine body, a lifting part and a traction part arranged on the vertical plate, and a downward drilling part arranged on the vertical plate and connected with the lifting part, the supporting table and the drill rod slip are fixed to one side of the drilling rig body and located below the vertical plate, and the drill rod slip is located below the supporting table; according to the scheme, the locking treatment assembly is arranged, and the joint of the two drill rods can be heated through the electromagnetic heating part; heat is firstly generated on the surface of the female buckle, the temperature of the female buckle is rapidly increased by utilizing an alternating magnetic field, so that the female buckle generates radial thermal expansion, the diameter of the female buckle is increased, and the thread fit tightness between the male buckle and the female buckle is instantaneously reduced within an extremely short time when the heat is not conducted to the inner-layer male buckle, so that the friction torque is greatly reduced, and conditions are created for subsequently applying the shackle torque; and the success rate of detaching the drill rod after the drill rod is stuck is improved.

The invention relates to an adaptive anti-interference terminal sliding mode control method and device for a servo drive system, and the method comprises the steps: reading a torque current and an actual measurement motor speed, and obtaining a filtered motor speed through a speed filter; calculating a driving torque and a friction torque; lumped interference in the operation process of the servo motor is observed on line through an interference observer, and a lumped interference observed value is output; the chattering phenomenon existing in the lumped interference observation value is relieved through the interference filter; calculating a speed error and a nonsingular terminal sliding mode surface; calculating an adaptive anti-interference terminal sliding mode control law; converting the control law into a torque current reference instruction, and inputting the torque current reference instruction into a current loop of a speed regulation system for execution; and updating the motor speed observation value and the lumped interference observation value. Therefore, the problems that in the prior art, under the non-negligible interference observation error caused by the large interference change frequency, it is difficult to guarantee high-stability operation of the servo motor, and the robust anti-interference capacity is poor are solved.

The application provides a rolling bearing friction torque measuring device, and belongs to the technical field of aero-engine and bearing testing. The measuring device is used for measuring the friction torque of a rolling bearing to be measured. The measuring device comprises a bearing seat used for fixing the rolling bearing to be measured, two groups of tension rod assemblies used for loading and measuring the load size of the rolling bearing to be measured, a cross beam connected to the other end of the tension rod assemblies, a bearing adapter assembly used for connecting the tension rod assemblies, the bearing seat and the cross beam, and a guide assembly used for controlling the up-and-down movement of the cross beam. The measuring device solves the problem of measuring the friction torque of a high-speed rolling bearing in the working state of an aero-engine. The highest rotating speed of the high-speed rolling bearing to be measured can reach 10000r / min.

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 utility model discloses a high-speed bearing friction torque detection device, which comprises a test base, an ejection mechanism, a test upper seat and a driving motor, the test upper seat is positioned right above the test base, the top of the test upper seat is fixedly connected with the driving motor, the lower surface of the test upper seat is provided with a blocking cover, the center of the test upper seat is provided with a press-fit seat, and the press-fit seat is fixedly connected with the push-out mechanism. The upper end of the test base is fixedly connected with a concave cavity, the center of the concave cavity is provided with an ejection mechanism in telescopic connection, the ejection mechanism comprises a guide rod, an ejection spring and a buckling seat, the buckling seat is fixedly connected to the top of the guide rod, the surface of the buckling seat is provided with a buckling step, and the joint of the guide rod and the test base is provided with a guide hole; the guide rod is embedded in the guide hole and is in sliding connection with the guide hole, and the bottom of the test base is fixedly connected with a torque sensor. According to the utility model, the center of the test base is provided with the ejection mechanism which can stretch up and down, so that the bearing can be conveniently ejected out of the concave cavity, and the convenience of detection operation is improved.