154 results about "Gear wear" patented technology

The invention relates to the technical field of gear detection, in particular to a gear wear detection method and system of a gear motor. According to the method, firstly, all fault characteristic frequencies are obtained based on historical vibration signals of a fault gear, then vibration signals of a to-be-detected gear are divided into a plurality of local impact sub-segments, and the local frequency spectrum of each local impact sub-segment and the kurtosis of each frequency in the local frequency spectrum are obtained; fitting a fuzzy estimation signal of the vibration signal in combination with power distribution under each fault characteristic frequency in the time-frequency spectrum, and then modulating the vibration signal in combination with a motor load condition; and finally analyzing a frequency spectrum signal of the modulation vibration signal, and evaluating the early wear type of the gear to be detected. According to the method, the vibration signal is modulated by analyzing the covering interference of noise and motor load on local wear impact, and the frequency modulation effect and the amplitude modulation effect are further analyzed in the frequency domain of the modulated vibration signal, so that the early wear type is accurately distinguished, and the gear wear detection effect is improved.

The invention relates to the related technical field of torque detection, in particular to a gear pump output torque fluctuation online detection method and system.The method comprises the steps that operating parameters such as gear pump vibration acceleration are collected, threshold values such as the pressure change rate and a gear rotation vector are combined to draw up a characteristic matrix, and a torque pulsation mode is recognized; and configuring a fluctuation stability factor correlation model weight, determining a torque fluctuation grade and performing graded reminding. The method solves the technical problems that the characteristic change of early faults such as gear wear and cavitation is not sensitive, the torque fluctuation cause cannot be determined, the fault diagnosis is lack of depth, and the risk of sudden equipment faults is increased, realizes the accurate capture of a complex fluctuation mode, and determines the fault diagnosis accuracy according to a closed volume pressure change rate threshold and an unloading groove cavitation critical value. The technical effects that the gear pump closed volume pressure change, the unloading groove cavitation effect and the mechanical vibration cooperative influence are quantified, the torque fluctuation grade is determined through early-stage accurate recognition of faults, and graded reminding is conducted are achieved.

The invention relates to the technical field of tractor power system fault diagnosis, and discloses a method and system for remotely diagnosing a power system fault of a tractor, and the method comprises the steps: monitoring a vibration signal, a sound signal and a temperature signal of a transmission gear of the tractor; extracting a frequency domain feature, a Mel frequency cepstrum coefficient feature and a temperature change trend feature of the vibration signal; carrying out weighted fusion on the signal features by adopting a dynamic weighting mechanism; constructing a fault prediction model based on an XGBoost algorithm, and outputting the gear wear degree and the fault occurrence time; and generating a fault early warning and transmitting the fault early warning to a mobile terminal APP and a cloud platform through an LTE or 5G network. Compared with a traditional fault diagnosis method in the prior art, particularly under the condition of dynamic working conditions, the technical problem that efficient and accurate fault diagnosis of the tractor power system is difficult to realize is solved, and the accuracy and response efficiency of fault diagnosis are improved by combining the convolutional neural network and the XGBoost algorithm.

An electric power train includes an electric drive, an electric motor driven by the electric drive, and a meshing pair of a drive gear and a driven gear. The drive gear is coupled to the electric motor and the driven gear is coupled to a mechanical load. The backlash of the meshing pair of the drive gear and the driven gear is measured and estimated based on a time until a contact of teeth of the rotating drive gear and the driven gear during a startup of the electric motor. Wear of the meshing pair of the drive gear and the driven gear based on a change in the measured backlash over time during the operation of the electric power train.

The invention relates to a quasi-static straight gear wear numerical analysis method, and belongs to the technical field of mechanical engineering. The method comprises the following steps: calculating a dynamic wear coefficient by using a mixed lubrication model; the contact pressure and the sliding distance are calculated in an integral form, a straight gear quasi-static numerical wear model is established by using matlab software with the help of an Archard formula, and a wear value is calculated; the influence rule of the modulus, the torque and the tooth width on the abrasion loss is obtained, and meanwhile the significance of the influence of the three factors is analyzed through an orthogonal experiment method. Compared with the prior art, the method has the advantages that the problem that the calculation of the contact pressure is greatly influenced by the grid units is researched and solved, so that the obtained contact pressure value is more accurate, and the tooth surface wear is reduced according to the rule and significance analysis of the influence of various factors.

The invention discloses a dual-function large gearbox gear wear scrap iron particle monitoring transmitter which comprises a monitoring module and a transmitting module, the monitoring module comprises a sensor probe and an installed magnet, and is provided with a sensor plate, a Hall magnetic sensing element and a temperature platinum resistor, and the transmitting module comprises a shell. A conditioning circuit board is arranged in an inner cavity of the shell. The invention relates to the technical field of scrap iron monitoring. According to the dual-function large-scale gearbox gear abrasion scrap iron particle monitoring transmitter, when fallen scrap iron is adsorbed through the sensor, the magnetic quantity of the sensor changes slightly, the transmitting module conducts conditioning according to a change signal of the sensor and converts the change signal into a digital signal or an analog signal, and then the signal value is output to an acquisition end; and through an area algorithm averaging mode, the current condition of the scrap iron content of the gear box can be observed in real time, and the running health state is monitored in real time.

The utility model discloses a four-shaft double-planet stirring machine which comprises a shell component, a base component, a rack lifting component, a transmission component, a cylinder score component, a cylinder cover component, a dispersing component, a stirring component, an electric appliance control component and a planet carrier component, the planet carrier component comprises a bearing seat, the inner wall of the bearing seat is in flange connection with an inner shaft and an outer shaft, the circumferential outer wall of the tail end of the outer shaft is fixedly connected with a fixed star stirring gear and an upper connecting plate, the circumferential outer wall of the tail end of the inner shaft is fixedly connected with a fixed star dispersing gear and a lower connecting plate, and the outer wall of the fixed star dispersing gear is meshed with an intermediate gear; supporting shafts penetrating through the lower connecting plate are symmetrically and fixedly connected to the outer wall of the bottom of the upper connecting plate, a sealing cylinder is fixedly connected to an inner cavity of the shell component, and the bearing seat is fixedly connected to an inner cavity of the sealing cylinder. The device has the advantages that high viscosity can be efficiently mixed and dispersed, the stability and uniformity of materials are guaranteed, the torque is more balanced, and gear abrasion is reduced.

The invention relates to a working condition following gear wear monitoring and predicting method based on a vibration signal, belongs to the technical field of gear transmission, and solves the problem that influence of different working conditions and different wear states of different positions of a gear cannot be considered in gear wear monitoring and prediction in the prior art. Comprising the following steps: S1, establishing a working condition Map graph based on dynamic working condition division of multi-source sensor fusion, and updating the working condition Map graph in real time; s2, establishing an Archard wear correction model, and calculating the wear extent of the gear; s3, establishing a gear nonlinear vibration model considering wear and clearance influence, and solving a vibration signal of a gear system; s4, a CNN-LSTM mixed wear diagnosis model is established, and training is carried out; and S5, acquiring and processing in real time to obtain a vibration signal of the gear system, and inputting the vibration signal into the CNN-LSTM mixed wear diagnosis model to obtain the current wear state probability distribution of the gear and the wear development trend prediction of the gear.

The invention discloses an electric slewing mechanism safety control method and system based on fault prediction, and the method comprises the steps: obtaining time series data including the motor winding temperature of an electric slewing mechanism, the U, V and W three-phase current of a motor, the rotating speed of the motor, the torque of the motor, and the X, Y and Z three-direction vibration acceleration of a transmission shaft, and corresponding fault type labels; constructing to obtain a training data set; wherein the fault types comprise motor over-temperature, motor overload, motor stalling, gear wear and output shaft breakage; training the LSTM network by using the training data set to obtain a trained LSTM network model; based on the trained LSTM network model, electric slewing mechanism fault prediction is carried out, a fault prediction result is obtained, and the fault prediction result comprises the probability value of each fault type; and performing fault grading processing according to the fault prediction result.

The invention relates to the field of machinery, in particular to a drum type rotary filter screen driving device. According to the device, a power output gear is meshed with a first transmission gear and a second transmission gear at the same time; the first transmission gear, the second transmission gear and the power output gear are all installed on the gear disc. The chain disc is connected with the replacement control gear through a transmission chain; the replacement control gear drives the gear disc to rotate; the laser sensor monitors the states of the first transmission gear and the second transmission gear; the water pipe is erected above the drum-shaped filter screen rack; a high-pressure nozzle is arranged at the end of the water pipe; an angle adjusting unit is arranged at the joint of the high-pressure nozzle and the water pipe; the lubricating oil nozzle is arranged in a gap between the first transmission gear and the power output gear; and the control unit is used for receiving the gear abrasion loss information of the laser sensor and starting water filling, transmission gear replacement or lubricating oil adding of the lubricating module. According to the invention, the service cycle is prolonged, the drum net out-of-service time is reduced, and the reliability of equipment is ensured.

The invention discloses an offshore wind turbine generator gearbox fault diagnosis method based on a knowledge graph, and relates to the technical field of intelligent fault diagnos.The offshore wind turbine generator gearbox fault diagnosis method based on the knowledge graph comprises the following steps that in the operation process of a wind turbine generator, sound wave data of a gearbox are collected through a preset sampling period; and a stable signal acquisition framework is established, and original signal input is provided for subsequent data processing. By dynamically adjusting the sampling frequency, early recognition and accurate diagnosis of potential faults of the gear box are achieved, and the operation reliability and maintenance efficiency of a wind turbine generator are effectively improved. Tiny noise changes are captured through dynamic sampling, gear abrasion is found in time, and fault deterioration is prevented; when stable, the sampling frequency is reduced to optimize resource utilization. Machine learning and a knowledge graph are combined, complex operation conditions are adapted, the fault diagnosis precision is improved, the service life of equipment is prolonged, and the maintenance and shutdown cost is reduced.

The invention provides a hidden Markov prediction compensation method and system for gear wear evolution, and belongs to the technical field of gear transmission, and the method comprises the steps: constructing a hidden Markov chain of a gear wear state-compensation parameter, building an encoder coding-decoding frame in a gear compensation system, extracting a hidden Markov chain state sequence by using an encoder, and carrying out the coding-decoding of the hidden Markov chain state sequence. A decoder is used for feeding back a prediction result to the compensation module; the observation sequence of the hidden Markov chain is substituted into the trained hidden Markov model, a corresponding state sequence is obtained, and life end point prediction is carried out; the state sequence is converted into an end-of-life prediction curve, and an optimal end-of-life value with the shortest distance between a prediction value and a target is searched in a pre-drawn compensation optimization solution space to serve as a reference wear state; and the reference wear state is substituted into an encoder in the hidden Markov chain, encoding curve parameters are obtained, parameter optimization is carried out on a compensation curve, and a traditional passive response strategy is converted into an active prevention strategy.

The invention discloses a lubricating structure for a planetary gear set and a filter, and the lubricating structure for the planetary gear set comprises a planet carrier, a rotating shaft connected with an eccentric sun gear in a sleeving manner, a planetary gear engaged with the eccentric sun gear and rotatably mounted on the planet carrier, and a lubricating assembly arranged in the inner wall space of the planet carrier, the lubricating assembly comprises a control part and an extrusion part, and when the rotating shaft rotates, the control part is used for driving the extrusion part to directionally convey lubricating oil to the eccentric sun gear through the extrusion pipe and transmitting the lubricating oil to the planetary gear through the rotating motion of the eccentric sun gear, so that automatic lubrication between the eccentric sun gear and the planetary gear is achieved. Automatic lubrication between the eccentric sun gear and the planetary gear can be achieved, the problems that lubrication is insufficient, gear abrasion is accelerated and the like due to the fact that workers forget to add lubricating oil due to negligence are solved, and regular inspection of workers is not needed; the service life of the planetary gear set is prolonged, and the reliability and stability of equipment operation are improved.

The invention discloses a gear abrasion testing machine and a testing method, and relates to the technical field of gear testing equipment. Real working conditions can be highly simulated, and the gear and the lubricating oil can be subjected to integrated collaborative testing. The testing machine comprises a gear accompanying test box, a gear test box, a first shaft system and a second shaft system, the first shaft system comprises an accompanying test pinion mounting shaft and a test bull gear mounting shaft; the accompanying pinion mounting shaft is fixedly connected with an accompanying pinion; the test bull gear mounting shaft is fixedly connected with a test bull gear; two ends of the accompanying test pinion mounting shaft are respectively connected with the driving motor and the test bull gear mounting shaft; the second shaft system comprises an accompanying test bull gear mounting shaft, a torque sensor, a loading clutch and a test pinion mounting shaft; an accompanying test bull gear is fixedly connected to the accompanying test bull gear mounting shaft; the test pinion mounting shaft is fixedly connected with a test bull gear; the loading clutch is used for applying and locking static torque; the invention further discloses a testing method based on the testing machine.

The application discloses a drive system fault analysis method and system based on motor current ripple, and relates to the field of electric bicycle drive state monitoring. The method comprises the following steps: collecting motor stator current signals, rotating speed, electric angle and environmental working condition parameters synchronously, removing noise interference by combining adaptive filtering technology, and extracting target ripple signals carrying load information; based on the physical parameters of the motor and the structure of the drive system, a dynamic coupling model is constructed to generate theoretical reference ripple signals under normal and multiple fault states; by comparing the measured ripple signals with the reference signals, system deviation information is obtained, and a composite fault feature vector is further extracted; finally, the feature vector is mapped to a fault mode library to accurately identify fault types such as gear wear, chain slack or bearing defects. Thus, through real-time analysis of the motor current ripple, the health monitoring capability of the electric bicycle drive system and the driving safety are effectively improved.

The dynamic lubrication type cycloid speed reducer comprises a base, a supporting seat is fixedly installed in the middle of the upper surface of the base, a protective sleeve is arranged on the upper portion of the supporting seat, a speed reduction gear module is arranged in the protective sleeve, and a filtering assembly is installed at the position, located at one end of the protective sleeve, of the upper surface of the base. An oil pumping assembly is mounted at the other end of the protective sleeve on the upper surface of the base; the filtering assembly and the oil pumping assembly are both communicated with the protective sleeve. According to the dynamic lubrication type cycloid speed reducer, an innovative lubrication circulation system is combined with a multi-stage cycloid speed reduction structure, the transmission efficiency is remarkably improved, and the service life is remarkably prolonged. The lubricating device has the core advantages that a closed-loop lubricating system composed of the filtering assembly and the oil pumping assembly is adopted, lubricating oil continuously and circularly flows in the protective sleeve, impurities are effectively removed through multi-stage filtering of the filtering cotton, the liquid separation plate and the porous filtering material, the cleanliness of the lubricating oil is kept, and gear abrasion is greatly reduced.

The utility model relates to the technical field of thickener lubrication, in particular to a transmission gear lubricating device of a peripheral transmission thickener, which comprises a thickener body, a bracket is arranged at the upper end of the top surface of the thickener body, two guardrails are symmetrically mounted on the top surface of the bracket, an arc-shaped groove is formed in the edge of the bracket, and the arc-shaped groove is communicated with the bracket. A plurality of travelling wheels are arranged in the arc-shaped groove, a rotating shaft is fixedly arranged in the middle of each travelling wheel, two connecting blocks are rotationally connected to each rotating shaft in a symmetrical structure, the top surfaces of the two connecting blocks are fixedly connected with the bottom surface of the bracket, and the outer walls of the travelling wheels are in frictional contact with the top surface of the concentration tank body. A motor is installed at the position, close to the edge, of the top face of the bracket through an installation base, and a speed reducer is coaxially connected to an output shaft of the motor. By the adoption of the structure, friction and abrasion during meshing are reduced, transmission efficiency is improved, the amount of sprayed lubricating oil is controlled more accurately, waste of the lubricating oil is reduced, gear abrasion caused by insufficient lubrication is avoided, and reliability is improved.

The utility model provides a novel lubricating speed reducing mechanism of a gearbox speed reducer, and belongs to the technical field of speed reducers. The gear box speed reducer solves the problems that in the meshing process of gears of an existing gear box speed reducer, products are abraded, the service life is short, and the replacement frequency is high. The novel lubricating speed reducing mechanism of the gearbox speed reducer comprises a transmission shaft arranged in the speed reducer, a large gear with a plurality of gear tooth parts is arranged on the transmission shaft, a transmission seat assembly is tightly arranged at the position, adjacent to the large gear, of the transmission shaft, and the transmission seat assembly is composed of a first transmission seat and a second transmission seat which are connected with each other. The first transmission seat and the second transmission seat are each provided with a notch, the two notches form an installation groove, a limiting disc is installed in the installation groove, the limiting disc is provided with an L-shaped fixing rod extending outwards, and the tail end of the L-shaped fixing rod is provided with a lubricating mechanism for spraying oil to the gear tooth part. The utility model has the advantages that the transmission wear is reduced, and the service life is prolonged.

The utility model discloses a gear maintenance machine for a tank. The gear maintenance machine comprises a rack; the punch mechanism is arranged on the rack in a supporting manner, and the punch mechanism can do reciprocating motion in the longitudinal direction; the gear is rotatably arranged on one side of the punch mechanism in a supported mode, and a plurality of grease injection holes are formed in the gear in the circumferential direction; the supporting frame is arranged on one side of the gear and the punch mechanism; one end of the grease injection box is fixedly arranged at the upper part of the support frame; one end of the grease injection channel is communicated with the bottom of the grease injection box; a grease injection pipe; one end of the first connecting rod is telescopically arranged at the lower part of the support frame, and the other end of the first connecting rod is propped against the edge of the gear; one end of the second connecting rod is hinged to the first connecting rod through a connecting rod, and the other end of the second connecting rod is connected with the grease injection pipe. And when the punch is used for cleaning the gear hole, the gear is subjected to grease injection through the grease injection mechanism and the two-connecting-rod stable limiting, so that the lubricating efficiency is improved, and the wear resistance of the gear is enhanced.

The invention discloses a gear wear estimation prompting method and system for a double-electric-drive-axle vehicle, and the method comprises the steps: obtaining the operation parameters of electric drive axles of the vehicle, including the single-axle operation time, single-axle operation mileage, torque output data distribution, torque positive and negative switching times and axle temperature data distribution of each electric drive axle; respectively processing the operation parameters to obtain wear factors of the corresponding operation parameters of the electric drive bridges; the obtained wear factors are multiplied by respective weight coefficients and then summed, and wear evaluation indexes of all the electric drive bridges are obtained; and comparing the wear evaluation index of each electric drive axle with a preset wear limit threshold, and generating early warning information and / or adjusting a drive control strategy according to a comparison result. According to the method, the wear degree is pre-judged through the wear evaluation index, so that early warning and prompting are given, and the passive mode of post-maintenance is changed; and the driving strategy is automatically adjusted by comparing the abrasion difference of the double axles, and the overall service life of the double electric drive axles is effectively prolonged.

The invention relates to the technical field of optical fiber rotary connectors, in particular to a micro multi-core optical fiber rotary connector rotary mechanism and an optical fiber rotary connector, and solves the problem of abnormal gear wear caused by axial movement of a transmission gear in the prior art. The rotating mechanism comprises a rotating body and a rotating body, the rotating body and the rotating body are in transmission connection through a transmission part, the transmission part comprises an annular positioning seat, two bearing seats are arranged on the inner side of the positioning seat, a compression spring is arranged between the two bearing seats, and transmission gears meshed with the rotating body and the rotating body are rotationally connected to the bearing seats. The positioning seat is in threaded connection with a positioning pin, and the end of the positioning pin extends into the inner side of the positioning seat to be matched with the bearing seat in an inserted mode. The transmission gear has the advantages that the inserting portion of the positioning pin is matched with the radial positioning hole of the bearing seat in an inserting mode, reliable locking of the axial position of the bearing seat is achieved, the defect that the transmission gear is prone to axial movement is fundamentally overcome, and the problem of abnormal abrasion caused by rigid abutting of the end face of the gear is avoided.

This utility model provides a car tailgate rotating motor, including a drive motor body. One end of the drive motor body has a circumferential array of mounting screw holes. A reduction gear assembly is mounted on one end of the drive motor body, and a rear end cover assembly is mounted on the other end. The reduction gear assembly includes a reduction gearbox, which is mounted on one end of the drive motor body. A cavity partition is fixedly connected to the inner wall of the reduction gearbox. The inner cavity of the reduction gearbox is divided into a transmission cavity and an oil storage cavity by the cavity partition. An input shaft sleeve is fixedly connected to the center of the oil storage cavity. Lubrication tubes are arranged circumferentially inside the oil storage cavity, and an oil-collecting cotton core is fixedly connected inside each lubrication tube. Oil replenishment holes are opened on the circumferential surface of the lubrication tubes. The mutual cooperation of the drive motor body, mounting screw holes, reduction gear assembly, rear end cover assembly, and electronic control cover assembly ensures that the device avoids the situation where gears cannot be lubricated, leading to severe gear wear and reduced transmission efficiency during use.

The utility model discloses a kind of inner cooling hole and spiral groove composite cutting tap, including bracing plate, sliding slot, butt joint rod, cutting tap and linkage mechanism, sliding slot is set on bracing plate, butt joint rod is slidably connected at bracing plate top, cutting tap is connected at butt joint rod one end, linkage mechanism is set on bracing plate.The beneficial effects of the utility model are:in the utility model, by setting linkage mechanism, and then by the meshing linkage of driving gear in linkage mechanism driving driven gear, and then by first adjusting rod and second adjusting rod respectively driving driving push-pull rod and driven push-pull rod linkage, and drive first pulley, second pulley reciprocating motion as a whole, and by sprocket and chain enable cutting tap to be driven fast reciprocating motion, by chain drive to replace cylinder / motor direct drive, avoid leakage problem caused by cylinder sealing element abrasion, simultaneously eliminate motor frequent forward and reverse rotation caused by winding overheating and gear abrasion, prolong the life of equipment.

This invention provides a high-precision gear transmission backlash elimination mechanism, comprising a fixed gear and a movable gear. The fixed gear is integrally machined onto the gear shaft, and a raised arc-shaped pad is provided on its end face near the movable gear. The movable gear is coaxial with the fixed gear and has the same tooth profile. A coaxial arc-shaped groove is provided on the movable gear at a corresponding position to the arc-shaped pad. A wedge block is inserted between the arc-shaped groove and the arc-shaped pad, causing an angular offset between the movable gear and the fixed gear. An adjusting screw mounting hole is provided on the end face of the movable gear near the arc-shaped groove adjacent to the wedge block. Screwing in the adjusting screw presses the wedge block in, eliminating backlash while preventing the wedge block from loosening. As the gear wears down over time, increasing backlash, it can be eliminated by screwing in the adjusting screw. The gear transmission system using this backlash elimination mechanism has no significant change in size and features high speed resistance, heavy impact load resistance, and high precision.

The utility model belongs to the technical field of ball mills, and particularly relates to a ball mill with a noise reduction function for cement preparation, which comprises a ball milling mechanism, a driving mechanism and a cleaning box, the ball milling mechanism comprises a base, a support, a ball milling cylinder and an outer gear, the top of the base is connected with the ball milling cylinder through the support, and the outer gear is arranged on the outer wall of the ball milling cylinder; the driving mechanism is connected with the outer gear, the driving mechanism comprises a driving part, a ball milling driving gear and a cleaning driving gear, the bottom of the outer gear is immersed in the oil tank, the outer gear is in contact with lubricating oil for lubrication while rotating, and meanwhile, the cleaning roller is driven by the gear to clean the outer gear. Gear abrasion caused by mixing impurities between the outer gear and the ball-milling driving gear is avoided, the gear is protected, noise generated by gear abrasion is reduced, and meanwhile the service life of the gear is prolonged.

This utility model belongs to the field of gear pump technology, and particularly relates to a high-viscosity dispensing gear pump, comprising: a pump body, on which an oil chamber, an oil inlet channel, and an oil outlet channel are provided, the oil inlet channel, the oil chamber, and the oil outlet channel being sequentially connected; a conveying gear set, the conveying gear set including a main gear and a secondary gear, the main gear and the secondary gear being rotatably disposed in the oil chamber and meshing with each other; a pump cover, the pump cover being connected to the pump body by fasteners for sealing the oil chamber; and several flow dividers, disposed in the oil chamber and located between the conveying gear set and the oil inlet channel. The beneficial effect of this utility model is that after the high-viscosity liquid is squeezed into the suction chamber under high pressure, it will come into contact with the flow dividers, and the flow dividers will cut and divide the high-viscosity liquid, reducing the impact force of the fluid, thereby reducing the pressure on the gears, reducing gear wear, and effectively extending the service life of the gear pump.

The invention provides a method for measuring and calculating the abrasion loss of an involute gear based on a self-reference datum. The method does not need to depend on an external reference, measurement errors caused by reference deviation are effectively reduced, an accurate and rapid calculation method is found, accurate calculation of different involute gear abrasion losses can be achieved by changing the basic parameters of the gear, and the calculation accuracy is improved. Similarly, the abrasion loss of corresponding involute parts, such as involute splines, can be accurately calculated. And a key technical support is provided for wear loss precision control and data reliability of the gear tooth surface in gear wear and gear contact fatigue tests and process and parameter design of the gear.

The application provides a multi-rotation valve gear box and a use method thereof, and belongs to the technical field of gear boxes. The gear box comprises a box body, a transmission shaft and a driving shaft. A driven bevel gear is arranged on the transmission shaft. An active bevel gear is arranged at one end of the driving shaft. An oil storage cavity is arranged at the end of the active bevel gear. A fixed shaft is arranged in the box body. One end of the fixed shaft extends into the oil storage cavity. An oil channel is arranged in the fixed shaft and is communicated with the oil storage cavity. A plurality of first channels are arranged on the active bevel gear and penetrate the active bevel gear in the circumferential direction. The outlet end of the first channel is located at the root of the adjacent teeth of the active bevel gear. A first oil path communicated with the inner cavity of the box body and a second oil path communicated with the oil channel are arranged on the box body. The first oil path and the second oil path are respectively connected with an opening degree control valve. In the application, the lubricating oil can be more effectively and uniformly covered on the tooth surface needing lubrication. Especially when the gear is running at high speed or bearing high load, a stable lubricating oil film can be formed, and the gear wear can be significantly reduced.

The application provides a measurement and calculation method based on self-reference reference involute gear wear amount. The method does not need to rely on external reference, effectively reduces the measurement error caused by reference deviation, and finds an accurate and fast calculation method. By changing the basic parameters of the gear, the accurate calculation of different involute gear wear amounts can be realized, and the wear amounts of corresponding involute parts, such as involute splines, can also be accurately calculated. The method provides key technical support for the precision control and data reliability of the gear tooth surface wear amount in the gear wear and gear contact fatigue test, and the process and parameter design of the gear.

The invention provides a digital twin tooth surface wear degradation morphology prediction method, which is applied to the field of gear transmission systems, and comprises the following steps: constructing a physical information neural network wear depth prediction model constrained by a gear transient wear model, obtaining a model for predicting a new tooth profile after the gear is worn and a rough morphology model for predicting tooth surface evolution after the gear is worn; a gear wear time-varying meshing stiffness calculation model is constructed, and the corrected wear gear time-varying meshing stiffness is obtained; in combination with a lumped parameter method, a gear system dynamic model is constructed, and a gear wear degradation transmission system simulation dynamic response is obtained; according to the method, the gear bearing supporting rigidity and damping are calibrated, the tooth surface dynamic meshing force is corrected, and finally the corrected tooth surface abrasion depth and the corrected tooth profile and tooth surface morphology are obtained. And interaction of actually measured vibration signals and tooth surface morphology virtual detection in gear box wear degradation is realized.