46 results about "Planetary gearbox" patented technology

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.

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 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 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.

Product comprising: an electric machine (86) operatively connected to a drive train module (10) comprising a gear train (36) with a fixed gear ratio, a first planetary gear set (48) with multiple gear ratios connected to the gear train (36), a second planetary gear set (74) with a fixed gear ratio operatively connected to the first planetary gear set (48), and a synchronizer (70), wherein the synchronizer (70) is operatively connected to the first planetary gear set (48) and is positioned between the first planetary gear set (48) and the second planetary gear set (74); a differential (12) operatively connected to the second planetary gear set (74);wherein the electric machine (86) selectively transmits power to the differential (12) through the transmission train (36), the first planetary gear set (48), the synchronizer (70), and the second planetary gear set (74), and wherein the synchronizer (70) is designed and arranged to switch the drive train module (10) into a high-range mode, a low-range mode, and a neutral mode by shifting a ring gear (62) of the first planetary gear set (48).

This utility model relates to the field of sedimentation tank anti-clogging technology, and in particular to a magnetically driven self-cleaning sedimentation tank sludge discharge anti-clogging device. Its technical solution includes a pretreatment chamber, on the front of which is equipped with a PLC for control and a sludge discharge valve. The pretreatment chamber contains an anti-clogging structure to prevent equipment blockage. The anti-clogging structure includes a planetary gearbox for adjusting speed and torque, and a motor for driving the device is located on one side of the planetary gearbox. This utility model, through the arrangement of the planetary gearbox, the grid body, and the composite blade, achieves three-level coordinated anti-clogging: fiber stripping, sludge breaking, and sludge pushing, improving the compactness of the structure. The magnetic drive unit enables zero-leakage transmission, fundamentally eliminating media leakage, reducing maintenance costs, and extending equipment life. Furthermore, through the coordinated use of the flushing structure, PLC, and sludge discharge valve, time-limited automatic cleaning can be achieved, reducing energy consumption and lowering operating costs.

Module (10) for an aircraft turbomachine, comprising: a planetary gearbox (14) having a rotating sun gear (16), a rotating ring gear (18), and planet gears (20) meshed with the sun gear (16) and the ring gear (18) and carried by a planet carrier (22); an annular ring carrier (30) having at a downstream end a first annular flange (30a) for attachment to the ring gear (18), and an annular channel (50) extending around the ring carrier (30) and located entirely upstream of the first flange (30a) of the ring carrier (30); and (50) having an annular cavity (52) into which open first radial oil passages (48) formed in the ring carrier (30) upstream of said first flange (30a). Figure for the abbreviation: Figure 1

This invention relates to the field of mechanical transmission, and more particularly to a dual-mode electric drive assembly based on a single planetary gearbox and dual motors, and its operating method. The assembly includes a housing, a first motor, and a second motor. The housing houses a planetary gearbox, a brake, a first clutch, and a second clutch. The planetary gearbox comprises three basic elements: a sun gear, a ring gear, and a planet carrier, or two sun gears and a planet carrier. Both the first and second motors are connected to the planetary gearbox, and one of the first and second motors is always connected to one of the basic elements, while the other motor can be selectively connected to that basic element and one of the remaining two basic elements in a selective transmission. One of the three basic elements, connected only to one of the motors, is selectively braked and connected to the housing via the brake. Power is output from the remaining basic element, which is neither connected to the first nor the second motor. This assembly uses only one planetary gearbox to achieve switching between torque and speed modes, reducing size and energy loss.

The utility model relates to a kind of planetary gear box, belong to gear box technical field.The gear box includes box, input shaft, at least one set of planetary gear set and output shaft.The inner ring of planetary bearing in planetary gear set is integrally formed with planetary wheel axle, outer ring and planetary gear respectively, reduce the number of parts, make structure more compact, reduce weight, reduce volume.The upper level sun gear is fixedly connected with the lower level planet carrier, shortens transmission path, improves transmission efficiency.In addition, it is also provided with last stage driving wheel, output gear, planet carrier bearing and other structures, realizes speed change, limiting and other functions, overall reduce cost while improving the comprehensive performance of gear box.

The invention relates to a turbojet engine including a shaft surrounded by a low-pressure rotor surrounded by a coaxial and independent high-pressure spool, this turbojet engine including from upstream to downstream: a fan driven by the shaft; a low-pressure compressor carried by the rotor; an inter-compressor casing; - a high-pressure compressor and a high-pressure turbine carried by the high-pressure spool; an inter-turbine casing; a low-pressure turbine carried by the rotor; an exhaust casing; this turbojet engine including: an upstream rotor bearing carried by the inter-compressor casing; a downstream rotor bearing carried by the exhaust casing; a gearbox downstream of the downstream bearing and through which the rotor drives the shaft; a downstream shaft bearing downstream of the downstream rotor bearing.

This invention belongs to the field of hybrid tractor transmission system design technology, specifically involving a dual planetary hybrid tractor gearbox configuration design method based on topological feature clustering, including the following steps: S1, constructing a complete static topology space for the dual planetary hybrid gearbox; S2, establishing a quantitative model of topological structural features; S3, clustering analysis and preliminary screening based on topological features; S4, power cycle and overspeed risk assessment; S5, secondary topology optimization design: introducing switching elements such as clutches and brakes on the basis of the basic topology, and adjusting the power source connection relationship and adding a mode switching mechanism. This invention constructs a complete dual planetary gearbox static topology space containing 108 candidate topologies, comprehensively covering all possible connection methods under given component sets and port constraints, avoiding the omission of excellent topology schemes, and providing a sufficient selection basis for configuration design.

The utility model relates to electric curtain planetary gear box field especially, a kind of with self-locking planetary gear box structure. Including mounting panel and connecting structure, the side of mounting panel is provided with motor, the motor is connected with mounting panel by means of connecting structure, the end of motor away from mounting panel is equipped with connecting plate, the output end of motor is equipped with first sun gear, the side of connecting plate away from motor is equipped with gear box shell, the inside of gear box shell is equipped with first layer inner tooth ring, the inside of gear box shell is equipped with output inner tooth ring, the inner wall of output inner tooth ring is provided with planet carrier, the inside of planet carrier is equipped with several planetary gears. The utility model provides a kind of with self-locking planetary gear box structure has in the operation process of electric curtain position locking at any time, to effectively improve the curtain control precision and stability, ensure the accurate positioning advantage after the shutdown of curtain.

This application provides a planetary reducer, a powertrain, and an electric vehicle, relating to the field of electric vehicle technology. The planetary reducer is used to drive the wheels of an electric vehicle. The planetary reducer includes multiple planetary gear sets, each including a sun gear, a ring gear, a planet carrier, and planet gears. The planet gears mesh with the sun gear and the ring gear respectively, and the planet carrier drives the planet gears. A first planetary gear set receives power and drives a second planetary gear set. The first and second planetary gear sets form two transmission paths, each driving one wheel. Due to the imbalance of torque losses caused by gears and bearings in the two transmission paths, the output torques of the two transmission paths are unequal. To reduce the difference in output torque between the two transmission paths, this application adjusts the transmission ratio of the second planetary gear set to be greater than that of the first planetary gear set, which is beneficial for improving the driving performance and safety performance of the electric vehicle.

The application discloses a desert photovoltaic self-sinking fence pile foundation, which comprises an energy conversion device, a power transmission module, a self-sinking pile foundation module and a matched safety control module which are sequentially connected in transmission; the energy conversion device adopts a variable-pitch wind wheel fan to convert wind energy into mechanical energy; the power transmission module realizes speed reduction and torque increase through a planetary gear box and transmits power through a stainless steel transmission shaft; the self-sinking pile foundation module is a spiral anchor pile foundation with sawtooth spiral blades and can be rotated into a sand layer under the drive of power; the safety control module adopts mechanical and electronic double control to realize anti-jamming, anti-reversing, accurate depth control and state monitoring. The application takes desert wind energy as a self-driven power source, can dynamically compensate the loss of burying depth caused by wind erosion, completely solves the problems of pile foundation exposure and fence collapse, does not need external power supply, synchronously improves anchoring force with burying depth, is suitable for complex desert environment and greatly reduces fence operation and maintenance cost.

The utility model discloses a novel super large torque servo electric wrench, including servo motor, planetary gear box, support frame, operating handle, torque transmission subassembly and wrench head part, control part contains touch -sensitive screen, PLC, research control servo drive, gateway and server MYSQL database, and touch -sensitive screen is connected with PLC communication and realizes man -machine interaction, and PLC is connected with research control servo drive, and research control servo drive is connected with servo motor, to control servo motor operation, and gateway will electric wrench operation data synchronization to server MYSQL database, realizes data tracing. The servo electric wrench selects normal volume servo motor and planetary reduction gearbox, and planetary gear box transmission efficiency is high, and reduces the efficiency loss in power transmission process, guarantees torque output while improving energy utilization efficiency, and combines PLC software segmentation rectification simultaneously, breaks through the mechanical structure precision limit, satisfies the high accuracy requirement of new energy motor to screw tightening.

This application relates to the field of fault prediction technology, specifically to a method and system for monitoring and early warning of fault risks in nuclear power plant equipment. Specifically, it includes: constructing a first fluctuation feature value based on the randomness of the peak occurrence time and the fluctuation characteristics of the signal sharpness in the vibration signal of a planetary gearbox bearing in a nuclear power plant; constructing a second fluctuation feature value by analyzing the distribution of sideband features in the envelope spectrum of the bearing vibration signal in each sampling period and comparing it with the center frequency of the previous sampling period; appropriately adjusting the filter length based on both factors, and combining this with a filtering algorithm to extract fault feature signals from the bearing vibration signal in each sampling period, thereby performing fault detection of the planetary gearbox within each sampling period. This solves the problem of inappropriate filter length values ​​when filtering the bearing vibration signal of a nuclear power plant planetary gearbox, improves the extraction accuracy of fault feature signals, and contributes to the accuracy of subsequent fault detection.

This application discloses a small-sample fault diagnosis method for planetary gearboxes based on MDGSAM and Swin Transformer, comprising: acquiring one-dimensional vibration fault data of the planetary gearbox; converting the one-dimensional vibration fault data into a two-dimensional fault image using Gram angle difference field; constructing a multi-scale denoising global sparse attention convolution module and an improved Swin Transformer module; after data augmentation, inputting the two-dimensional fault image into the multi-scale denoising global sparse attention convolution module and the improved Swin Transformer module respectively to extract global spatial features and local detail features; fusing the extracted global spatial features and local detail features, and outputting the fault classification result through an adaptive feature selection module. This application significantly improves the accuracy and robustness of intelligent diagnosis of planetary gearboxes.

The present application relates to the technical field of fault diagnosis, and particularly relates to a planetary gearbox fault diagnosis method based on a physical information enhanced graph attention network. The method extracts physical features and statistical features, constructs a hypergraph structure through set operation and comprehensive weighting, solves the problem of ignoring physical information in a single feature space, introduces physical prior edge weight to guide attention calculation through a feature coding fusion module and a physically guided graph attention mechanism, and mines fault mechanism features in a vibration signal. The method realizes probability level fusion of physical knowledge and data driving by constraining attention distribution approximation to physical prior through a KL divergence regular term. The present application can effectively solve problems such as poor graph quality of a graph neural network, missing physical information and the like under strong noise interference, and realizes efficient and accurate diagnosis of weak faults of a planetary gearbox.

This invention relates to the field of wind power generation equipment technology, and in particular to an independent lubrication system for the sliding bearings of planetary gears in a wind turbine gearbox. The system includes a variable frequency lubrication pump, a control unit, and an electrically controlled directional valve, independent of the original gearbox lubrication system. The outlet of the electrically controlled directional valve has two independent branches, one configured with a lubricating oil heating system and the other with an air-cooled radiator. These two branches converge and connect to the sliding bearings of the planetary gears. The control unit is electrically connected to a wind turbine blade speed sensor and a generator current sensor, and adjusts the variable frequency pump speed based on internally stored operating parameters. A first oil temperature sensor is installed on the oil line before the electrically controlled directional valve, and a second oil temperature sensor is installed at the bearing lubrication point. The control unit uses a closed-loop adjustment based on the temperature difference between the two sensors to correct the heating or cooling power, achieving precise temperature control. This invention, through an independent lubrication circuit, adaptive oil supply adjustment based on operating conditions, and closed-loop precise temperature control, achieves dedicated lubrication protection for the sliding bearings, ensuring the stable operation of the wind turbine planetary gearbox.

This invention relates to the field of engineering machinery technology, and particularly to a gearbox powertrain, its control method, and engineering machinery. The gearbox powertrain includes a motor, a main gearbox, and a secondary gearbox. The main gearbox includes a first planetary gear set, a second planetary gear set, and a first gear shifting mechanism. The secondary gearbox includes a third planetary gear set and a second gear shifting mechanism. This invention employs a main gearbox plus a secondary gearbox configuration, enabling 3*2 gear shifting, i.e., six-speed shifting. Furthermore, during gear shifting, the secondary gearbox can be first fixed to a certain gear according to the working conditions, and then the main gearbox can be shifted to the corresponding gear, better adapting to different working conditions. Additionally, both the main and secondary gearboxes are planetary gearboxes, featuring a novel combination, simple manufacturing, and controllable quality.

The present invention provides a planetary carrier assembly, a planetary gearbox and its assembly, and an assembly method for eliminating backlash. [Solution] The system comprises a first frame and a second frame, with the planetary gear fixed to the second frame via bearings. The end faces of the second frame and the adjacent end faces of the first frame are assembled and fixed via fasteners. A portion of the carrier plate of the second frame is of an elastic or separate structure, allowing for elastic deformation. During the expansion process of the second frame, the meshing between the first planetary gear and the fixing ring gear becomes tighter. Before assembling the sun gear to the planetary gear reducer assembly, an expansion tool is used to expand the pitch circle diameter of the axis of the planetary gear on the second frame, reducing the meshing gap between the fixing ring gear and the first planetary gear. The second bolt is then tightened in a tightly meshed state, bringing the adjacent end faces of the first and second frames into contact. After this, the expansion tool is removed and the remaining components are installed.

The application provides a kind of planetary gearbox multi-point stress synchronous test method and system, it is related to mechanical structure state monitoring and fault diagnosis technical field;The application realizes the three-dimensional space positioning of micro crack source on high-speed rotating planet wheel under the coordinate system of planet wheel body by synchronously collecting acoustic emission waveform and planet carrier motion parameter, constructing dynamic positioning model fusing Doppler compensation;At the same time, by polarizing analysis of acoustic emission longitudinal wave to extract polarized main direction vector, and carrying out vector matching analysis with crack point local geometric coordinate system obtained from three-dimensional digital model, online quantitative discrimination of crack mechanics mode as tensile dominant type or shear dominant type is realized;The application promotes planetary gearbox fault diagnosis from general abnormal alarm to diagnosis level of fixed wheel, fixed point and qualitative diagnosis, and improves the intelligent level and engineering effectiveness of predictive maintenance.

This invention relates to the field of wind turbine gearbox manufacturing, disclosing a quenching method, a spline, and a method for manufacturing a planetary gearbox for a wind turbine. The planetary gearbox includes a spline, and the manufacturing method includes a quenching method. The workpiece surface is provided with a spline, and the spline teeth include teeth. The quenching method includes a quenching step: a laser moves relative to the teeth along the tooth width direction to quench the teeth. During the laser's movement relative to the teeth along the tooth width direction, the amount of laser energy received per unit area of ​​the teeth is changed and / or the heat dissipation rate of the teeth is controlled to keep the deformation of the teeth after the quenching step within a preset range. On the one hand, the teeth do not need to be machined again after the quenching step, which is applicable to situations where post-heat machining is difficult; on the other hand, controlling the laser energy and the heat dissipation of the teeth does not add any process steps, nor does it require coating the workpiece surface with materials and / or changing the surface properties of the workpiece, making the operation simple and the hardening of the workpiece tooth surface reliable.

Wind turbine gearbox (1), in particular planetary gearbox, with several gear wheels, in particular planet gears (4), each of which is mounted on an axle (8) via a bearing element, characterized in that the bearing element is a multi-layer plain bearing (7), wherein the multi-layer plain bearing (7) has at least one support layer (14) and at least one sliding layer (15), wherein the sliding layer (15) has a Vickers hardness of at least 75 HV(0.001) at least in the surface region of a running surface (16), or wherein a sliding layer (15) is applied to an inner surface of the bore of the gear wheel receiving the axle (8) and / or to an outer surface of the axle (8), wherein the sliding layer (15) has a Vickers hardness of at least 75 HV(0.001) at least in the surface region of a running surface (16).

This invention relates to the field of planetary gearboxes, specifically to a planetary gearbox for vehicles with overload buffer protection. The gearbox includes a planetary gearbox with an input shaft mounted at one end. This invention, through an electric actuator linked to a speed monitoring system, can identify overload, stall, and other abnormalities under vehicle operating conditions in real time. This triggers precise axial displacement of the drive bearing housing, disengaging the original rigid transmission connection. By meshing with bevel gears, double-sided bevel gears, and a fixed bevel gear ring, the transmission path is switched and the transmission ratio is changed, achieving overload buffering and torque unloading. This prevents irreversible damage to the precision components inside the gearbox, improving equipment operational stability and service life. Simultaneously, the pre-modular design allows for the addition of overload protection without modifying the original internal structure and installation interface of the planetary gearbox, avoiding the technical and cost risks of modifying the original gearbox. It has strong universal adaptability, catering to both new vehicle integration and old vehicle retrofitting needs.

An electromechanical actuator assembly (EMA) for use with a reclinable passenger seat. The EMA includes a housing, an electric motor, and an epicyclic gearbox including first and second ring gears. In the event of power loss, the second ring gear can be decoupled from the first ring gear to permit relative rotation, for instance to manually return the reclined seat to upright, by a mechanical override mechanism including first and second spring-loaded shoot bolts coupled to the first ring gear, a displaceable plate engaging one end of the first and second spring-loaded shoot bolts, and a manual release pin coupled to the displaceable plate. In use, the manual release pin is moveable axially to a position in which the displaceable plate displaces toward the first ring gear to decouple the first and second ring gears.

A lifting module 100 is provided for patient lifting systems 300a, 300b. The lifting module 100 is coupled to a roller 50 of the patient lifting system. The lifting module includes: a first motor 10 configured to drive the roller 50; a second motor 20 configured to drive the roller 50; a planetary gearbox 40 connecting the first motor 10 and the second motor 20 to the roller 50, the planetary gearbox 40 being configured to transfer torque from the first motor 10 and / or the second motor 20 to the roller 50; and a variable locking mechanism 30. The locking mechanism 30 is configured to couple to the second motor 20, wherein the variable locking mechanism 30 is configured to provide controlled deceleration of the output shaft 43 of the planetary gearbox 40, depending on the movement of the patient 200.

This utility model discloses a push-pull type assist device for a planetary gearbox, comprising a main shell, a snap-fit ​​seat fixedly connected to the upper surface of the main shell, a shell cover slidably connected to the outer surface of the snap-fit ​​seat, a positioning groove on the outer surface of the shell cover, a slot on the outer surface of the snap-fit ​​seat, and a limiting component. The limiting component includes a fixed box, an inclined insert block, a first spring, a slide rod, a wedge block, a limiting plate, a threaded column, a limiting round block, a limiting block, a second spring, and a hexagonal sleeve. The inner surface of the fixed box is slidably connected to the inclined insert block, the outer surface of the inclined insert block is fixedly connected to the first spring, and the inner surface of the fixed box is slidably connected to the slide rod. By setting up structures such as the snap-fit ​​seat, positioning groove, slot, and limiting component, the shell cover can be easily disassembled, thereby solving the traditional shell cover disassembly problem and greatly improving the convenience of oil lubrication. Furthermore, no tools are required, making it highly practical.