220 results about "Planetary gearbox" patented technology

The invention discloses a high-reliability planetary gearbox signal denoising method, system, medium and equipment, and the method comprises the steps: obtaining original vibration signals of a nuclear power circulating pump planetary gearbox in different health states, and carrying out the detrending and demean preprocessing of the signals; performing modal decomposition on the original vibration signal by adopting an empirical mode decomposition (EMD) algorithm, an ensemble empirical mode decomposition (EEMD) algorithm and a variational mode decomposition (VMD) algorithm to obtain a plurality of different modal components; iteratively optimizing a hyper-parameter value in the variational mode decomposition algorithm VMD by adopting a sparrow search algorithm SSA so as to realize the self-adaptive decomposition of the variational mode decomposition algorithm VMD on the signal; and carrying out modal decomposition on the gearbox vibration signal by adopting a variational modal decomposition algorithm VMD after iterative optimization, removing noise components in modal components, and reconstructing the signal to realize gearbox vibration signal denoising.

The invention provides a compound uniform-load and shunt load shedding type planetary gear gearbox with a face gear. The compound uniform-load and shunt load shedding type planetary gear gearbox comprises an input planet carrier integrated assembly, a first-stage compound uniform-load planet row, an inter-stage flexible connection structure, a second-stage planet row and a face gear steering output assembly. The input planet carrier integrated assembly is connected with the first-stage compound uniform-load planet row, the inter-stage flexible connection structure is arranged between the first-stage compound uniform-load planet row and the second-stage planet row, and a first-stage floating sun gear in the first-stage compound uniform-load planet row and the main shaft planet carrier structure are coaxially arranged. The first-stage floating sun gear is installed in a floatable mode through a first-stage sun gear supporting shaft, self-adjustment can be achieved in the radial direction and the axial direction, and the first-stage floating sun gear is meshed with the first planet gear and the second planet gear in a double-side mode. The energy conversion efficiency can be improved, uneven load distribution is improved, and the system integration degree is improved.

Disclosed herein is an integrated in-line emergency lube pump assembly for a planetary gearbox, including a main lube pump, a coaxial lube pump coaxially aligned with and coupled to the planetary gearbox, and an oil tank having a main section and an auxiliary section. There is no physical boundary between the main section and the auxiliary section of the oil tank. When the detected pressure in the oil supply line is equal to or exceeds a predetermined pressure threshold, the main lube pump operates to causes the main pump to pump oil from the main section of the oil tank to the planetary gearbox. Alternatively, when the detected pressure in the oil supply line is less than the predetermined pressure threshold the main lube pump ceases operation to cause the coaxial lube pump to draw oil from the auxiliary section of the oil tank to the planetary gearbox.

The invention relates to the technical field of reducer vibration noise optimization, and discloses a planet row coaxial reducer vibration noise optimization method, which comprises the steps of obtaining initial assembly parameters of a reducer, collecting load measurement signals of planet wheels of the reducer under an order frequency sweeping working condition, converting the load measurement signals into equivalent meshing loads based on a calibration curve, and calculating the equivalent meshing loads according to the equivalent meshing loads. Calculating a load imbalance coefficient according to the equivalent meshing load, and taking a peak value of the load imbalance coefficient as a first evaluation index; shell radial acceleration and sound pressure signals are synchronously collected under the order frequency sweeping working condition, the side-band ratio is calculated, and the peak value of the side-band ratio is taken as a second evaluation index; and performing diagnosis shunting based on the first evaluation index and the second evaluation index, determining an assembly parameter which is adjusted preferentially, executing iterative adjustment, and outputting a final assembly parameter after iteration is completed. According to the method, uniform load unbalance caused by assembly errors and side band amplification caused by geometric eccentricity can be effectively separated and solved, and vibration and noise of the speed reducer are reduced fundamentally.

The invention discloses a double-speed-ratio transmission planetary driving gearbox, which relates to the technical field of planetary gearboxes and comprises a pressurizing mechanism, a linkage mechanism and a positioning mechanism. According to the invention, online dynamic speed ratio switching of the planetary gearbox under the continuous operation condition is realized, a set of intelligent execution mechanism based on pneumatic driving and magnetic coupling is integrated in the input shaft, and a power transmission path is quickly changed from a high-speed direct connection mode to a high-speed direct connection mode to a high-speed direct connection mode. The planetary reduction mechanism comprising the sun gear, the planet gear and the gear ring locked by the positioning mechanism is seamlessly switched, the output rotating speed is remarkably reduced finally, the torque is multiplied finally, the whole switching process is smooth and rapid, transmission of input power does not need to be interrupted, and the switching efficiency is improved. The operation efficiency and the self-adaptive capacity of the equipment in the continuous technological process are greatly improved, and production interruption, capacity loss and extra energy consumption caused by frequent start and stop are fundamentally avoided.

The invention relates to a gearbox fault diagnosis model construction method based on metric guide graph comparative learning, and belongs to the field of gearbox fault diagnosis model construction. The method comprises the following four core stages: firstly, carrying out frequency domain conversion and normalization on vibration signals of the gearbox to generate a node characteristic matrix; secondly, a cosine distance and an Euclidean distance are fused to construct a mixed distance matrix, and a fault diagnosis graph is generated based on a K-nearest neighbor algorithm; then unsupervised graph comparison pre-training is realized through graph data enhancement and a dynamic graph attention network (DGAT); and finally, weak supervision fine tuning is carried out by using a small number of marked samples to complete construction of the gearbox fault diagnosis model. According to the method, the construction of the high-precision gearbox fault diagnosis model can be realized in a scene with extremely few marked samples (1-10 samples per class), and the method is suitable for planetary gearbox health monitoring in the fields of wind turbines, helicopters, hybrid electric vehicles and the like.

The invention discloses geochemical sampling equipment and a using method thereof, and relates to the technical field of geological sampling, the geochemical sampling equipment comprises a sampling device base, the sampling device base is placed on geological soil, a lifting system is installed on the sampling device base, the lifting system is connected with a driving system, and the driving system is connected with the sampling device base. The bottom end of the driving system is connected with a hand-operating mechanism, a planetary gear box body mechanism is movably connected in the hand-operating mechanism, the output end of the driving system penetrates through the hand-operating mechanism and is in transmission connection with the planetary gear box body mechanism, and the output end of the bottom of the planetary gear box body mechanism is connected with a sampling drill bit. A collecting mechanism is connected into the planetary gear box body mechanism, and a cleaning mechanism is further connected into the planetary gear box body mechanism. According to the equipment, the planetary gear box body mechanism and the cleaning mechanism are combined, so that when the sampling drill bits cut soil, chippings can be collected and cleaned synchronously, and the collecting mechanism is of a surrounding type cleaning structure.

The invention discloses a novel ultra-large torque servo electric screwdriver which comprises a servo motor, a planetary gearbox, a supporting frame, an operating handle, a torque transmission assembly and a screwdriver head part. The control part comprises a touch screen, a PLC, a research control servo driver, a gateway and a server MYSQL database, the touch screen is in communication connection with the PLC to achieve man-machine interaction, the PLC is connected with the research control servo driver, the research control servo driver is connected with the servo motor to control operation of the servo motor, and the gateway synchronizes electric screwdriver operation data to the server MYSQL database to achieve data tracing. According to the servo electric screwdriver, the servo motor with the normal size and the planetary reduction gearbox are selected, the planetary reduction gearbox is high in transmission efficiency, efficiency loss in the power transmission process is reduced, torque output is guaranteed, meanwhile, the energy utilization efficiency is improved, meanwhile, PLC software is combined for segmented deviation correction, the limitation of mechanical structure precision is broken through, and the requirement of a new energy motor for high screw tightening precision is met.

An electric drive train for a motor vehicle having first and second electric engines and a planetary gearbox which has a first shaft, a second shaft, a third shaft, a fourth shaft and a fifth shaft, and first and second vehicle wheels. With regard to a torque flow originating from the electric engines running to the vehicle wheels, the electric engines are arranged upstream of the planetary gearbox, which is arranged upstream of the vehicle wheels in the torque flow. A first switching element is provided to couple the second rotor to the first shaft.

The method comprises: - a step of application of a mechanical brake to fix the sun gear (20) in position, - a step of application of an alternating torque on the rotor (16), - a step of measuring an angular displacement of the rotor (16) versus the stator (14), and - a step of translating the measured angular displacement of the rotor (16) into a wear value of the involute spline.

The invention relates to a driving device for an electric bicycle and an assembly for a driving device for an electric bicycle. In at least one embodiment, the drive device (100) comprises a planetary gearbox (2) having a planet carrier (20) which is mounted rotatably about an axis of rotation (A) by means of a radial bearing (4) and an axial bearing (5).

The invention relates to an electric drive module (1) for a motor vehicle comprising an electric machine (2), a planetary gear set (5) operable via two different gear ratios (3, 4), wherein a sun gear (7) serving as the input (6) of the planetary gear set (5) is connected to a rotor shaft (8) of the electric machine (2) in a torque-transmitting manner, and a switching system (9) for switching between the two gear ratios (3, 4), wherein the switching system (9) is configured such that, to adjust the gear ratio (3, 4), it axially displaces a planet carrier (10) of the planetary gear set (5) between at least two different positions and thereby alters a torque transmission path. The invention also relates to an electric drive train (26) for a motor vehicle, comprising an electric drive module (1) according to one of the preceding claims and a transmission (54) downstream of the drive module (1).

An integrated in-line emergency lubrication oil pump assembly for a planetary gearbox includes a main lubrication oil pump, a coaxial lubrication oil pump coaxially aligned with and coupled to the planetary gearbox, and an oil tank having a main section and an auxiliary section. No physical boundary exists between the main section and the auxiliary section of the oil tank. When the detected pressure in the oil supply line equals or exceeds a predetermined pressure threshold, the main lubricant pump operates to cause the main pump to pump oil from the main section of the oil tank to the planetary gearbox. Alternatively, when the detected pressure in the oil supply line is less than a predetermined pressure threshold, the main lubricant pump stops operating to cause the coaxial lubricant pump to draw oil from the auxiliary section of the tank to the planetary gearbox.

A torque wrench such as a power wrench has a drive motor with an intermediate gearbox connected downstream of the drive motor and with a bolting gearbox connected downstream of the intermediate gearbox as a planetary gearbox with a bolting tool part on the output side, and with a housing with at least one handle in which the drive motor and the intermediate gearbox are arranged in sequence. The drive motor is non-rotatably arranged and fixed in the housing, and the intermediate gearbox is rotatably mounted in the housing and is non-rotatably connected to a ring gear of the planetary gearbox, so that, during a bolting operation, only the reaction forces occurring on the housing as a result of the drive motor have to be supported by an operator, and the reaction forces occurring as a result of the intermediate gearbox are supported by the torque support foot.

The invention relates to a planetary gear box fault diagnosis algorithm automatic generation system and method based on a large language model, and the system comprises a large language model generation module which is used for receiving cue words, selecting a parent planetary gear box fault diagnosis algorithm and architecture component knowledge, and combining the characteristics of a planetary gear box fault diagnosis task, calling a large language model to generate a new planetary gearbox fault diagnosis algorithm code; the dynamic code execution and verification module is used for code execution and verification; the architecture evaluator module is used for performing training and performance evaluation; the intelligent evolutionary strategy module is used for analyzing the training history to obtain an analysis result; the program database module is used for storing and managing populations of planetary gearbox fault diagnosis algorithms and constructing cue words; and the evolutionary control engine is used for coordinating and controlling the working process of each module and controlling the number of iterative evolutionary times to realize evolutionary circulation. Compared with the prior art, the method has the advantages of automatic generation, iterative evolution and the like.

This invention discloses a planetary gearbox fault diagnosis method and related equipment based on empirical wavelet transform. The method includes: acquiring the structural parameters of each component in the planetary gearbox to be tested, determining the fault characteristic frequency and meshing frequency of each component based on the structural parameters, calculating the number of initial frequency bands, and dividing the signal spectrum of the planetary gearbox to be tested according to the number of initial frequency bands to obtain initial frequency bands; calculating the comprehensive fault index of the initial frequency bands, and determining whether the initial frequency bands are fault frequency bands. If they are fault frequency bands, reconstructing the boundary of the initial frequency bands according to the comprehensive fault index and a preset boundary merging rule to obtain target frequency bands, and performing EWT transform on the signal spectrum according to the target frequency bands to obtain target EWT component signals; calculating the IMF kurtosis value of each target EWT component signal, selecting sensitive EWT component signals from the target EWT component signals according to the IMF kurtosis value, performing envelope spectrum analysis on the sensitive EWT component signals, and obtaining a diagnostic conclusion.

The utility model discloses a diving tubular pump with fully-adjustable shaft overflowing blades, and relates to the technical field of water conservancy projects. The device comprises a diving tubular pump, the left end of the diving tubular pump is connected with a round-square gradually-changing flow channel through a left-end expansion joint, and the right end of the diving tubular pump is connected with a vertical shaft flow channel through a right-end expansion joint; a vertical shaft is arranged in the vertical shaft flow channel; an asynchronous submersible motor, a planetary gearbox, a thrust bearing box, a pump section hydraulic model and a hollow adjusting shaft are sequentially arranged in the submersible tubular pump from left to right, and the right end of the hollow adjusting shaft extends into the vertical shaft to be connected with a built-in synchronous hydraulic adjusting mechanism. Diffusion type guide vanes are not arranged any more, excellent conventional pump section hydraulic models, such as south-to-north water diversion series and the like, which are already checked and affirmed can be directly utilized, and meanwhile dynamic operation full adjustment of the vanes of the submersible tubular pump is achieved.

A kind of planetary gearbox fault diagnosis method based on circuit resonator belongs to the field of planetary gearbox fault diagnosis. Including the following steps: piezoelectric sheet is connected in parallel with inductor, and an LC resonant circuit is formed. Then the piezoelectric sensor is pasted on the planetary gearbox shell, so that the piezoelectric sheet and the box are coupled as a whole. The time domain voltage signal between the capacitor ends in the resonant circuit when the planetary gearbox is running is collected, and then it is analyzed by resonance demodulation. No need to locate the resonance band through a series of algorithms, because the resonance frequency of the resonant circuit is known. The envelope order spectrum of the resonance band is obtained, and compared with various fault characteristic frequencies, so as to realize fault diagnosis. It can effectively avoid the interference of corresponding running of fixed shaft gear train and other components, and accurately extract the fault characteristics of planetary gear train.

The invention relates to the technical field of intelligent diagnosis of mechanical system faults, and particularly discloses a planetary gearbox fault intelligent diagnosis method, which comprises the following steps: S1, collecting a public data set of a planetary gearbox, and dividing the public data set into a training data set and a test data set; s2, industrial white noise filtering processing is carried out on each data set; s3, respectively carrying out normalized dimension removal and decentration processing on each data set; s4, performing kernel principal analysis processing on the data to obtain main features of the fault information; s5, clustering based on a decision tree is established, information of the same fault category is classified into one category according to the Euclidean distance, and a center distance is selected; the center distances of different types of fault information are classified again, and different types of fault information with similar Euclidean distances are clustered into pseudo classes; and S6, repeating the steps S2 to S5 on unknown fault information, and performing KNN classification on the unknown fault information and the pseudo class to realize fault information discrimination of the pseudo class. According to the method, the number of traversal steps can be reduced to the maximum extent, and planetary gearbox fault diagnosis can be rapidly and effectively achieved.

The invention relates to a planetary-level module and a modularized planetary gear reduction gearbox, and the modularized planetary gear reduction gearbox comprises an input-level module used for being connected with a driving source and an output-level module used for outputting torque; wherein the output end of the input stage module is detachably connected with the output stage sun gear of the output stage module. According to the reduction gearbox, due to modular and detachable arrangement, all modules of the reduction gearbox can be rapidly replaced, and the problems that a gearbox is inconvenient to maintain and single in speed ratio are solved; the output end of the input-stage module is detachably connected with a planetary-stage sun gear of the planetary-stage module, and the output end of a planet carrier assembly of the planetary-stage module is detachably connected with an output-stage sun gear of the output-stage module; the input stage module, the at least one planetary gearbox module and the output stage module are sequentially connected in series, the total transmission ratio of the reduction gearbox can be continuously adjusted by increasing or decreasing the number of the planetary gearbox modules connected in series, and therefore the reduction gearbox can adapt to different reduction ratios.

A vacuum sealable container for securing and transporting extraterrestrial samples includes a container body and a lid assembly detachably coupled to the container body, the lid assembly selectively hermetically sealing the container body. The lid assembly includes an input shaft configured to receive a rotational input; a planetary gearbox including a sun gear fixed to the input shaft and at least one planetary gear configured to receive a torque input via the sun gear; an output shaft coupled to the at least one planetary gear; and a locking assembly coupled with the output shaft.

The invention relates to a driving device for an electric bicycle and an assembly for an electric bicycle. In at least one embodiment, the drive device (100) has a planetary gearbox with a planet carrier (20) and a bevel gear stage (3) with a first bevel gear (30). The planet carrier and the first bevel gear are coupled together in a rotationally fixed manner. The planet carrier and the first bevel gear are rotatably mounted by means of a radial bearing (4) about an axis of rotation (A). The radial bearing is supported by the planet carrier.

The winch with the walking mechanism comprises a winding drum, a base, a winding drum support and an installation platform, the base moves on the installation platform in a reciprocating mode, a fixed support is installed in the middle of the installation platform, a lead screw matched with a lead screw nut is installed on the fixed support in a rotating mode, and a driven chain wheel is installed at one end of the lead screw. A winding drum support is installed at the top end of the base, a bearing seat is installed on one side of the winding drum support, the winding drum is installed on the bearing seat, a driving chain wheel is installed at one end of the winding drum, and the driving chain wheel and a driven chain wheel are connected through a chain. A motor is installed on the other side of the winding drum support and drives the winding drum to rotate through a planetary gearbox. According to the utility model, when the winch works, the winding drum part of the winch can correspondingly and axially move along with the winding and unwinding of the steel wire rope on the winding drum, so that the relative position of the steel wire rope is not changed.

A low-speed end assembly of a planetary gearbox relates to the field of gearboxes and comprises a gear shell, a gear shaft, a first positioning component and two second positioning components. An assembling through hole is formed in the gear shell, the gear shaft penetrates through the assembling through hole and is rotatably matched with the gear shell, and an annular assembling hole is formed between the gear shaft and the hole wall of the assembling through hole; the gear shaft and the gear shell are connected in a matched mode through a first positioning assembly and two second positioning assemblies, the first positioning assembly is located between the two second positioning assemblies, a first positioning supporting column of the first positioning assembly can roll around a first axis, and second positioning supporting columns of the second positioning assemblies can roll around a second axis. The first axis is located in an area defined by the multiple second positioning supporting columns of the same second positioning assembly. The product is simple in structure and few in parts, the requirement for bearing capacity can be met, the weight can be reduced, and the size can be reduced.

The utility model discloses a kind of planetary gear mechanism and gear box, including shell, and the first planetary transmission, the second planetary transmission and the third planetary transmission installed in shell, the first planetary transmission includes first planetary carrier, and three groups of first planetary gears, the second planetary transmission includes second planetary carrier, and five groups of second planetary gears, the third planetary transmission includes third planetary carrier, and three groups of third planetary gears;The middle part of first planetary gear, second planetary gear and third planetary gear is vertically provided with shaft hole, and multiple oil storage grooves are vertically provided with on the outer side of shaft hole. By being provided with multiple oil storage grooves on the outer side of the shaft hole of each planetary gear, the oil storage groove is used to store lubricant, and the lubricant in contact with gear shaft is supplemented to gear shaft during the operation of gear box, lubrication to the rotation of planetary gear is played, the friction between planetary gear and gear shaft is reduced, to improve the service life of planetary gear box.

The invention discloses a planetary gearbox fault enhancement diagnosis method and device, a medium and a product. According to the method, the influence of an encoder error on the instantaneous angular velocity is eliminated through an improved multi-frequency notch filter, noise suppression and signal definition are smoothly enhanced through a Savitzky-Golay filter, and the enhanced instantaneous angular velocity with more obvious fault feature reservation is obtained; and the encoder error comprises an eccentric error, a scribed line error and a tilt error. According to the method, a harmonic modulation fusion index HMFI is introduced, sideband modulation and harmonic impact energy are jointly captured, and the sensitivity and robustness of judgment of distortion caused by encoder errors are improved. According to the method, the error-fault coupling relation is analyzed in the frequency domain, the nonlinear interaction between the encoder induction harmonic wave and the fault modulation sideband is systematically revealed, and the gap between low-cost encoder deployment and high-reliability diagnosis in the rotating machinery is effectively filled up.

The invention discloses a high-reliability planetary gearbox fault diagnosis method, system, medium and equipment, and the method comprises the steps: carrying out the feature extraction and feature selection based on a random forest algorithm, and carrying out the nonlinear feature extraction based on multi-scale permutation entropy, performing multi-scale coarse graining processing on each vibration signal, calculating permutation entropy values of coarse graining sequences under different scales, forming a multi-dimensional phase space, and obtaining a feature matrix of permutation entropy; performing feature dimension reduction and feature embedding based on kernel principal component analysis; according to the fault diagnosis based on the bidirectional long-short term memory neural network, a classifier of the bidirectional long-short term memory neural network is used, a feature set is divided into a training set and a test set to serve as input layers, and then a classification result is output through two LSTM units of a hidden layer, a full connection layer and Softmax function mapping. And high-reliability planetary gearbox fault diagnosis is realized.

A journal bearing shaft assembly includes a shaft pin, a first bearing insert, and a second bearing insert. The pin includes a length, a generally circular perimeter, an outer surface, an oil supply groove, a first bearing groove, and a second bearing groove. A generally circular perimeter is defined by the outer surface in a plane perpendicular to the length. The oil supply groove extends longitudinally along a majority of the length and interrupts the generally circular perimeter. The first bearing groove extends longitudinally along a majority of the length and interrupts the generally circular perimeter at a first circumferential location. The second bearing groove extends longitudinally along a majority of the length and interrupts the generally circular perimeter at a second circumferential location. The second circumferential position is diametrically opposite the first circumferential position. The first bearing insert is located in the first bearing groove. The second bearing insert is located in the second bearing groove.

The application relates to the technical field of high-viscosity material dispersion equipment, and discloses a double-planetary dispersion feeder, which comprises a material bucket, the bottom of the material bucket is provided with a movable base, a support frame for stably supporting the material bucket is arranged between the bottom of the material bucket and the movable base, the upper part of the material bucket is provided with a bucket cover, the inside of the bucket cover is provided with a planetary gear box, and the planetary gear box is internally provided with a planetary gear transmission mechanism. In the process that the dispersion shaft performs composite motion, the internally arranged hydraulic telescopic rod can drive the telescopic inner rod to move up and down, so that the middle shear plate fixedly connected with the sliding block is lifted between the rough shear plate and the fine shear plate, the interval of the shear layer is dynamically adjusted, and the process rigidification problem caused by the fixed dispersion plate in the prior art is fundamentally solved. The equipment can dynamically adjust the interval of the shear plates in real time and on line according to different stages of material from wetting to fine dispersion, so that the shear strength required by different formulas and processes can be automatically matched.

The utility model provides a planetary gear box and a vehicle power system.The planetary gear box comprises a planet carrier (1), a gear box (2), a gear box (3), a gear box (4) and a gear box (5), and the planet carrier (1) is provided with a planet pin oil inlet channel (13); the planet pin (5) is in a hollow cylinder shape, the planet pin (5) is connected to the planet carrier (1), the planet pin (5) is provided with an oil outlet hole, the oil outlet hole penetrates through the peripheral wall of the planet pin (5), and the planet pin oil inlet channel (13) is communicated to the planet pin (5) so as to be communicated to the oil outlet hole; the gear bearing (4) is arranged on the planet pin (5) in a sleeving mode, and oil in the planet pin (5) can be guided to the gear bearing (4) through the oil outlet hole; and the planetary gear (3) is arranged on the gear bearing (4) in a sleeving manner.