293 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 discloses a planetary gear system digital twin model updating method based on deep reinforcement learning. The planetary gear system digital twin model updating method comprises the steps of S1, simplifying a planetary gear system; s2, describing the kinetic model by using a lumped parameter method, and constructing a planetary gear train oscillatory differential equation set; s3, a frequency response function family is calculated through finite element analysis, and a planetary gearbox rigid-flexible coupling model, namely a digital twinborn body, is constructed; s4, vibration response of the planetary gearbox shell under the stable rotating speed is obtained through a vibration signal collecting device; s5, defining an action space and a state space, and establishing a reinforcement learning environment; s6, solving the oscillatory differential equation set to obtain a simulation response, and constructing a reward function according to the simulation response; step S7, setting neural network parameters; step S8, optimizing by using a deep reinforcement learning algorithm; and step S9, loop iteration is carried out, the optimal physical parameters of inversion are output, and updating of the digital twinborn body is realized.

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.

The invention relates to a method and system for estimating life of a planetary gearbox (100). The system comprises an arrangement of sensors (S1 – S8) for obtaining field operational data relating to loading and speed of components of the gearbox and a processing unit (150) configured to execute method steps of the invention comprising: i) receiving sensors signals during a series of time intervals t; and for each time interval t ii) calculating a distance travelled Li by each gear (105, 107, 110) and each bearing (115) of the gearbox, based on the received sensor signals; iii) calculating the load acting on each bearing and on each, based on the received sensor signals; iv) calculating a scale parameter Ai of a Weibull distribution associated with the life of each gear and bearing, based on a probabilistic life that is determined from the load calculated in step iii) and a known rating for each of these components, to obtain an operating condition severity (F), where ki is a known shape parameter of the Weibull distribution; v) calculating a used capacity ci(t) of each bearing and each gear by summing the operating condition severity (F) obtained for each time interval multiplied by the distance travelled Li by the component during the associated time interval, and vi) calculating a used capacity C(t) for the gearbox, based on the used capacity calculated for each component in step v) and on a shape parameter ks of a Weibull distribution associated with the life of the gearbox. A remaining useable capacity of the gearbox (100) may be determined from the calculated used capacity C(t), which is turn may be used to estimate a remaining useable life of the gearbox.

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.

A battery-powered troweling machine is driven by an electric motor powered by a pair of twenty-four volt batteries coupled in series to drive a planetary gearbox to rotate a trowel blade assembly engageable with the surface of the poured concrete. The controls are carried by a detachable handle that is connectable with a receiver box that traps the handle between interior and exterior stops and uses over center clamps to maintain the handle in proper position within the receiver box. The controls at the rearward distal end of the handle can be used to vary the speed of rotation of the troweling assembly, to adjust the pitch of the individual trowel blades through an actuator and linkage assembly, to initiate actuation of the electric motor and to provide an emergency stop for the operation of the troweling machine.

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.

The invention relates to a planetary gearbox (10) for a force-feedback unit of a steering wheel actuator for a steer-by-wire steering system of a motor vehicle, the planetary gearbox comprising: a ring gear (HR) and a sun gear (SO) arranged concentrically to the ring gear (HR); a plurality of planetary gears (PL) meshing with the sun gear (SO) and the ring gear (HR), wherein a toothing of the ring gear (HR) has a first helix angle (βHR) and a toothing of the sun gear (SO) has a second helix angle (βSO), and wherein a toothing of at least one of the plurality of planetary gears (PL) has a third helix angle (βPL) which differs from the first helix angle (βHR) and the second helix angle (βSO). The invention also relates to a steering wheel actuator for a steer-by-wire steering system of a motor vehicle.

A planetary gearbox includes a planet carrier having stop faces, planet journals, planet bearings, planet gears and thrust washers. Each of the planetary gears is arranged on one of the planet journals by one of the planet bearings. Each thrust washer is arranged between the planet carrier and one of the planetary gears. Each thrust washer includes a first washer side and a second washer side facing away from the first washer side, a lower circumferential circular segment, and a wing formation arranged to rest on one of the stop faces. Each washer side includes recessed portions and raised portions, each arranged adjacent to one of the recessed portions. The recessed portions are arranged to supply a lubricant to one of the planet bearings. The wing formation extends from the lower circumferential circular segment outwardly in a tangential direction.

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.

To provide a shaft member, a planetary gear unit and a planetary gear device that promote discharge of foreign matter to stably form an oil film on a sliding portion, thereby reducing seizure and abnormal wear and prolonging a service life.SOLUTION: An outer peripheral surface 27 of a shaft member 22 slides against an inner peripheral surface 24 of a planetary gear member 21. The shaft member 22 comprises a sliding part 26, an opening part 41, a connection passage part 42, and a groove part 43. The sliding part 22 is provided on the outer peripheral side of a body part 25, and has an outer peripheral surface 27 that slides against the inner peripheral surface 24. The outer peripheral surface 27 is divided circumferentially into a first region 31 and a second region 32 set in advance. The opening part 41 opens into the first region 31 on the outer peripheral side of the sliding part 26. The groove part 43 is recessed radially inward from the outer peripheral surface 27, and connects the opening part 41 to at least one axial end part of the sliding part 26. A groove end part 48, which is an end part opposite the opening part 41, opens to an outer wall 29 at an axial end part of the sliding part 26.SELECTED DRAWING: Figure 5

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 invention relates to the technical field of engineering loaders, in particular to a double-variable transmission assembly of a loader, a loader hybrid system and a control method. The double-variable transmission assembly comprises an electric torque converter and a planetary gearbox. And the electric torque converter is in transmission connection between the output shaft of the engine and the planetary gearbox. The electric torque converter is provided with a first transmission shaft, a second transmission shaft, a first motor and a second motor; the change gear set is provided with a first output end, a second input end and an output end. One end of the first transmission shaft is in transmission connection with the first motor and the engine; the other end of the second transmission shaft is in transmission connection with the hydraulic pump and the second input end of the change gear set. On the basis of an arrangement structure of an existing fuel oil platform loader, torque change and speed change are carried out through a double-variable transmission assembly, and meanwhile charging is carried out through a first motor and a second motor when power of an engine is surplus.

The invention discloses a multi-source multi-path planetary gearbox fault source identification method based on signal correlation, and the method specifically comprises the following steps: arranging measurement points at a plurality of positions of a planetary gearbox, and collecting vibration signals; on the basis of a preset threshold value model of each measuring point, judging the state of each component, identifying a fault area, and finding out a potential fault source which causes a fault; for the potential fault sources, a planetary gearbox vibration signal separation method of a multi-path dictionary is used, and the most relevant path from each potential fault source to the fault alarm measuring point is separated; and forming an over-complete dictionary by the obtained most relevant paths, solving a sparse representation coefficient matrix of the over-complete dictionary through a sparse representation model, and locking a fault source causing the fault. The method provided by the invention has wide applicability of planetary gearbox fault identification, and the accuracy of unknown fault identification is effectively improved.