1231 results about "Main bearing" patented technology

The invention relates to the technical field of compressors, in particular to a horizontal compressor and a vehicle comprising the horizontal compressor, according to the horizontal compressor, an inner cavity of a shell is divided into a low-pressure cavity and a high-pressure cavity by a middle partition plate body, and an oil pool is arranged at the bottom of the high-pressure cavity; the crankshaft is supported by a main bearing and an auxiliary bearing which are installed on the side faces of the two ends of a compression assembly in the high-pressure cavity, one end of a crankshaft hole is separated from the high-pressure cavity, and the other end of the crankshaft hole is communicated with the low-pressure cavity. The main bearing is installed on the middle partition plate body, the side faces of the two ends are located in the high-pressure cavity and the low-pressure cavity respectively, and the bottom of the main bearing is immersed in the oil pool and provided with an oil suction channel communicated with the oil pool. A first oil way channel is arranged between the crankshaft and the main bearing and communicated with the low-pressure cavity, a second oil way channel and a third oil way channel which are communicated are arranged among the crankshaft, the compression assembly and the auxiliary bearing, the third oil way channel is communicated with the shaft hole, and the end, away from the oil pool, of the oil suction channel is communicated to the first oil way channel and the second oil way channel. And all parts can be fully lubricated in the operation process.

The invention discloses a fatigue life model of a single-row tapered roller bearing and an optimization method. Contact load, contact stress and fatigue life need to be calculated. Generally speaking, when the service life is reached, fatigue damage occurs at the maximum contact load position, and the failure of the part starts to fail from the maximum contact load position theoretically. The cycle time of the rolling body or the ferrule at the maximum contact load under the maximum stress is calculated according to the formula and is not influenced by the failure of a certain roller (or ferrule) and other parts of the bearing on the service life of the bearing. According to the invention, the fatigue life, the static strength and the static bearing capacity meet the requirements, and the total volume sum of the upwind bearing and the downwind bearing is minimum. On the premise that the performance requirement and the 20-year service life specified by the IEC61400-4 standard are met, the size sum of the two fan main bearings is reduced by 13.68%, the production and transportation cost is reduced, the economic benefits of enterprises are improved, and long-term stable operation of wind power equipment is guaranteed.

The invention discloses a balance weight block and a scroll compressor, and relates to the technical field of scroll compressors, in particular to the balance weight block and the scroll compressor. According to the balance weight block and the scroll compressor, the auxiliary oil supply channel is arranged in the balance weight block; and the auxiliary oil supply channel is formed by a balance weight block annular channel and an upward channel on the balance weight block and a transverse channel, an eccentric channel and an annular channel on the driving shaft component or a combination of several of the components. According to the technical scheme, the problems that in the prior art, in the operation process of the scroll compressor, especially under the condition of low-speed operation, enough stirring force cannot be provided for the lubricating agent, so that the thrust surface between the movable scroll component and the main bearing seat is lubricated insufficiently, and consequently excessive abrasion, even kinematic pair failure and the like are caused are solved.

The invention relates to the technical field of modeling, in particular to an aero-engine main bearing kinetic model correction method based on sensitive feature fusion, which comprises the following steps: constructing an aero-engine main bearing kinetic model; simulation data are generated according to the collected actual measurement data, time-frequency domain features of the actual measurement data and the simulation data are extracted, and an initial feature set is constructed; based on a binary improved horse swarm optimization algorithm, sensitive features are screened out from the initial feature set, a sensitive feature set is constructed, a component matrix coefficient of the sensitive feature set is calculated in combination with a principal component analysis method, and a fused sensitive feature expression is obtained; calculating fusion sensitive features of the measured data and the simulation data by using the fusion feature expression, and taking a difference calculation formula of the two as a target function for model correction; and performing optimization based on a horse group optimization algorithm and the target function, updating model parameters of the aeroengine main bearing dynamic model, and realizing correction of the aeroengine main bearing dynamic model.

The invention relates to the technical field of gas bearings, in particular to a refrigerant foil dynamic pressure gas radial bearing capacity estimation method and system.The method comprises the steps that the working temperature, the working pressure, the bearing diameter and the rotating speed when a bearing works are obtained, and a refrigerant medium is determined; obtaining the dynamic viscosity of the refrigerant according to the working temperature, the working pressure and the refrigerant medium; according to the bearing diameter, the rotating speed, the refrigerant dynamic viscosity and the main structure parameters of the bearing, a bearing capacity estimation formula of the bearing is constructed; performing iterative optimization on the main structure parameters of the bearing according to a bearing capacity estimation formula of the bearing to obtain optimal structure parameters; the main structure parameters of the bearing subjected to iterative optimization comprise the bearing length, the bearing nominal clearance and the eccentricity rate. According to the method, the bearing capacity of the bearing is estimated by selecting different bearing lengths, bearing nominal clearances and eccentricity ratio combinations, so that main structural parameters of the bearing are designed, the bearing capacity of the bearing meets the requirements, and the running eccentricity ratio is within a reasonable range.

When a sliding main bearing of a wind driven generator is under a heavy-load working condition, a lubricating oil film in a starting stage is not enough to form a complete fluid lubricating film, namely, a friction surface forms a boundary lubrication state, and friction in the stage seriously affects the service life of the bearing. In this way, a macroscopic model and a microscopic model are coupled, and a multi-scale model is verified through experiments. The macroscopic model is established based on an actual structure of a wind power main shaft sliding bearing, and is equivalent to a three-layer structure of a rigid bearing base, an elastic surface supporting layer and a main shaft; a three-layer microcosmic molecular model representing'main shaft-lubricating oil-elastic supporting layer 'is established by the microcosmic model facing the boundary lubrication state of a friction pair. Wherein the thickness of the supporting layer is changed by the macroscopic model, the components of the supporting layer material are changed by the microscopic model, the friction coefficient of the tribological interface under different supporting layer thicknesses and material components is analyzed through the macro-micro cross-scale analysis model, and the optimal thickness and the optimal material component proportion suitable for the service condition of the wind power main shaft sliding bearing are obtained.

The invention discloses a vehicle body protection structure and a vehicle. The vehicle body protection structure comprises a vehicle frame longitudinal beam, a doorsill and a protection piece. A doorsill is arranged on at least one side of the frame longitudinal beam, a first gap is formed between the frame longitudinal beam and the doorsill, and at least part of the protection piece is arranged in the first gap. The protective part is arranged between the doorsill and the longitudinal beam, side face supporting is provided for the doorsill, the possibility that the doorsill turns over and deforms in the collision process is reduced, and the doorsill can be fully crushed and deformed when bearing side face collision; meanwhile, the protection piece can transmit side collision force borne by the threshold to the frame longitudinal beam, the high-strength frame longitudinal beam is used as a main force bearing part, the collision deformation of the vehicle body can be reduced, and therefore the safety of the vehicle is effectively protected.

The invention discloses an aviation generator with a self-stabilizing function, and relates to the technical field of aviation generators, the aviation generator comprises a casing, a driving device, a cooling device and a soaking device, the casing is used as a main bearing main body and is used for mounting other devices, the driving device is mounted through a driving cavity, and the cooling device is used for cooling the cooling device; the driving device is used for converting external input torque into electric energy to be stored, the cooling device is used for cooling the whole machine, the soaking device is used for assisting in adjusting the temperature of oil liquid, the proportion of the cooled oil liquid is adjusted according to the temperature rising conditions of the oil liquid under different working conditions, and therefore the final oil liquid temperature is adjusted. And the temperature of the oil entering the circulation again tends to be stable.

The invention relates to an integrated control arm assembly special for a heavy-duty vehicle. The integrated control arm assembly is composed of a control arm body (1), a self-lubricating bearing (2), a self-lubricating bush (3), a ball pin (4), a lower ball bowl (5), a screw (6), a gasket (7), a first clamp (8), a second clamp (9) and a dust cover (10). The control arm body (1) is integrally forged and formed and is a main bearing part, one side of the control arm body is connected with a vehicle body through a pin shaft, and the other side of the control arm body is connected with a steering knuckle through a ball hinge. The invention is applied to a lower cross arm of a McLewis suspension of a heavy-duty vehicle or an upper cross arm and a lower cross arm of a double-cross-arm suspension, and is suitable for effectively supporting and connecting wheels and a vehicle body when the wheeled heavy-duty vehicle passes through complex road surfaces such as desert, muddy or icy and snowy road surfaces, so that the suspension reliability of the wheeled vehicle is improved. The control arm assembly structure has the advantages of being high in bearing capacity, free of maintenance of the ball hinge, reliable in structure and convenient and fast to install.

The invention provides an innovative design of a corrugated pipe damper integrated on a sliding main bearing aiming at the problems of transmission system abrasion and fatigue damage caused by vibration energy accumulation of the wind power main bearing under a complex wind load, and belongs to the technical field of wind power generation equipment. A traditional main bearing damping structure is low in energy absorption efficiency, insufficient in dynamic response and difficult to effectively suppress vibration. Through collaborative design of a corrugated pipe multi-stage laminated structure and a fluid energy dissipation channel, a composite mechanism for dynamically dissipating vibration energy is formed. The core of the damping device is composed of a corrugated pipe assembly, damping cavities and a main shaft adaptive structure, impact energy is absorbed through axial flexible deformation of the corrugated pipe, vibration attenuation is achieved in combination with reciprocating flowing of damping fluid in the multiple cavities, and low-frequency swing and high-frequency harmonic waves of a main bearing are synchronously restrained. According to the design, the bearing capacity is guaranteed, vibration transmission is remarkably reduced, the service life of the main bearing is effectively prolonged, the operation reliability of a unit is improved, and the damping requirement of a core transmission system of a high-power wind turbine generator is met.

The present invention makes it possible to inhibit the enlargement of a lubrication region in a speed reducer including a sealing member. The speed reducer includes a case, a carrier, main bearings, and a sealing member. The carrier is located at least partly inside the case. The main bearings are located between the case and the carrier. The sealing member includes a first ring, a second ring, and a first elastic ring. The first ring is annular and mounted to one of the case and the carrier. The second ring contacts an annular region of the first ring. The first elastic ring is compressed between the second ring and the other of the case and carrier. The sealing member is located at least partly in the same region as the main bearings in the radial direction perpendicular to the rotation axis of the carrier rotating relative to the case.

The invention belongs to the technical field of wind driven generator main bearing test equipment, and discloses a five-degree-of-freedom wind driven generator main bearing test bench for simulating real working conditions, which comprises a loading system, a test system and a driving system. The loading system adopts a sliding bearing loading disc to simulate a hub of the wind driven generator, and adopts a hydraulic cylinder array to simulate five-degree-of-freedom hub loads of three-direction forces including axial force, radial force and vertical force and two-direction moments including pitching moment and yawing moment. The test system adopts a two-point supported tapered roller bearing main shaft system to simulate the main shaft configuration of the wind driven generator, and can be independently disassembled to replace the model of a test bearing. The driving system adopts a variable-frequency and variable-speed motor, the rotating speed range is 0-200 rpm, and the requirements of various working conditions such as frequent start and stop, performance tests and strengthening tests can be met. According to the invention, through multi-dimensional load loading and multi-working-condition simulation, a key platform is provided for reliability test and failure mechanism research of the wind power main bearing.

The invention discloses a method and device for predicting the service life of an engine crankshaft main bearing, and relates to the technical field of engines, and the method comprises the steps: obtaining a vibration signal of the engine crankshaft main bearing, and carrying out the one-dimensional depth feature extraction of the segmented vibration signal, and obtaining a feature vector; inputting the feature vector into an SOM network for training, determining a target optimal neuron and a corresponding weight, and calculating a vibration feature life index of the main bearing; obtaining performance parameters of the main bearing, establishing a main bearing life prediction physical model, and calculating a physical model life index of the main bearing; based on the vibration characteristic life index and the physical model life index of the main bearing, determining a life comprehensive evaluation index of the main bearing; and generating a main bearing life prediction curve based on the life comprehensive evaluation index of the main bearing. The service life of the crankshaft main bearing is predicted by combining a vibration characteristic service life index obtained by deep learning and a physical model service life index obtained by material mechanics, and the prediction accuracy and reliability are improved.

The invention belongs to the technical field of wind turbine generators, and particularly relates to a wind turbine generator fault early warning and abnormal parameter inspection method comprising the following steps: collecting historical operation data of a wind turbine generator, analyzing the data, and establishing a data model; the historical data comprises operation data of a generator, a gear box, a main bearing, a variable pitch system and an electrical system; vibration spectrums of a gearbox and a generator rotating part are monitored through an acceleration sensor to identify whether bearing pitting corrosion, gear tooth breakage mechanical faults and frequency are abnormal or not; an on-line monitoring device is installed in an oil way of the wind turbine generator to monitor the oil state in real time. The temperature of the gearbox and the bearing is detected through the thermal infrared imager, and whether the temperature is abnormal or not is monitored; abnormal sound signals of blade cracks or bearing early damage are captured through an ultrasonic sensor, and the blade is judged.

The invention discloses a three-fulcrum engine compact type main load-bearing structure rigidity design method and application, and the method comprises the steps: firstly, carrying out the iterative optimization design of the determined rotor structure fulcrum rigidity, and determining the rigidity of each fulcrum; secondly, the static strength of the initial stator assembly and the stiffness of each fulcrum are analyzed, if the static strength and fulcrum stiffness requirements are not met, the stator assembly is optimized, and a stator assembly structure determined for the first time is obtained after optimization is completed; then, the coaxiality of all supporting points of the stator assembly determined for the first time is analyzed, if the requirement is not met, the main bearing structure is optimized, and a stator assembly structure determined again is obtained after optimization; finally, static strength and fulcrum rigidity analysis is conducted on the stator assembly determined again, if the requirements are met, the final stator assembly structure is obtained, and if not, iterative optimization is conducted. The vibration performance and the structural reliability of the whole machine can be remarkably improved, and the method is suitable for engineering design of aero-engines, gas turbines and the like.

The invention provides a pumped storage power station inclined shaft TBM and an expanding excavation mechanical construction method. The TBM comprises a shield body, a conical expanding excavation cutterhead is arranged at the front end of the shield body, a main drive is arranged in the shield body, the conical expanding excavation cutterhead is connected with the main drive through a main bearing, and a plurality of front supports and rear supports are arranged on the peripheral sides of the front end and the rear end of the shield body respectively; the shield body between the front support and the rear support is provided with a thrust oil cylinder and a driving support shoe, and the pumped storage power station inclined shaft TBM creeps and advances under the cooperation of the front support, the rear support, the thrust oil cylinder and the driving support shoe. Besides, by means of the mechanical construction method of the pilot shaft and TBM expanding excavation, the problems that construction guidance and the hole forming body type are not easy to control, the excavated hole is poor in flatness, poor in safety and the like existing in excavation of a drilling and blasting method can be solved, excavation of a traditional drilling and blasting method is eliminated, the hole forming quality is improved, disturbance to surrounding rock is reduced, and potential safety hazards are reduced; safe and efficient excavation of the water diversion inclined shaft in the pumped storage power station is guaranteed, and the construction period of key lines is shortened.

A strain wave gearing (1) is configured to have a unitized structure having a main bearing (5) that supports an internally toothed gear (2) and an externally toothed gear (3) in a manner that allows relative rotation, and an output flange (6) that is linked to the externally toothed gear (3). The externally toothed gear (3) is formed in the shape of a wine glass and ensures a large hollow diameter, which is required in cases where the externally toothed gear (3) is incorporated into a robot joint part or the like. A strain gauge (101) of a torque sensor (100) is attached to an outward-facing end surface portion of the output flange (6) linked to the externally toothed gear (3). The torque sensor (100) is capable of precisely detecting rotational torque without being affected by flexing of the externally toothed gear (3), and elements such as the strain gauge (101) are not exposed to oil, grease, or the like.

The invention discloses a magnetic suspension force determination method and device, a storage medium and a computer program product, and relates to the field of wind power engineering, and the magnetic suspension force determination method comprises the steps: determining the maximum bending moment force which can be resisted by a wind wheel according to the maximum wind power and the farthest force arm borne by the wind wheel in the rotation process of a historical time period; the size of a permanent magnet in the passive magnetic suspension bearing is determined according to the maximum bending moment force and the weight of the wind wheel, the fixed part of the passive magnetic suspension bearing is arranged on the outer side of the wind wheel, and the rotating part of the passive magnetic suspension bearing is arranged on the inner side of the wind wheel; the magnetic suspension force of the passive magnetic suspension bearing is determined according to the size of the permanent magnet, and the magnetic suspension force is used for suspending the wind wheel at the target height. By the adoption of the technical scheme, the problem that in the prior art, due to the fact that the main bearing of the vertical-axis wind turbine makes contact with the wind wheel, the main bearing bears huge loads, and mechanical abrasion of the main bearing is caused is solved.

The invention relates to the technical field of injection molding devices, in particular to an automobile interior trim part injection molding integrated forming device which comprises an injection molding machine, a position control mechanism arranged on the injection molding machine, a pushing mechanism arranged on the position control mechanism, a chip removal mechanism arranged on the pushing mechanism and two mold end grinding mechanisms arranged on the chip removal mechanism. The position control mechanism comprises a top plate, a supporting plate and a hydraulic part arranged in the supporting plate. The position control mechanism which can be finely adjusted to provide suspension is arranged on a top plate of a traditional double-colored plastic injection machine, the position control mechanism serves as a main bearing platform of the two sets of mold end grinding mechanisms at the moment, and the end faces of the two molds can be attached by the two sets of mold end grinding mechanisms along with closing of the upper mold towards the lower mold; rusty spots on the end surface of the mold are cleaned under the pressurization of the position control mechanism, so that effective rust removal operation on the end surface of the mold in a narrow gap in the injection molding machine is effectively ensured.

A motor system includes: a stator connected to a case of a motor; main bearings connected to the case; a main shaft rotating on the main bearings; a rotor mounted on the main shaft and rotating relative to the stator; and at least one of a magnetic flux reducing circuit element and a conductive rolling-element device disposed inward of the main bearings and closer to the stator and the rotor than the main bearings and reducing flow of bearing current through the main bearings.

The invention discloses a shaft-type magnetic flux motor structure for stirring household appliances, which comprises a stator and a rotor, and is characterized in that the stator is fixed on a first carrier and is provided with a plurality of coil windings which are circumferentially and equally distributed on a plane at intervals; the rotor comprises a rotor main body mounted on the second carrier through a main bearing, a rotating shaft fixed at the upper end of the rotor main body, and a plurality of magnets which are fixed on the lower end surface of the rotor main body, are uniformly distributed according to the circumference and are in one-to-one correspondence with the coil windings, and N poles and S poles of the magnets are distributed in the axial direction; the polarities of two adjacent magnets on the same plane are opposite; the second carrier is detachably installed on the first carrier, the magnet is arranged above the coil winding, and a gap is formed between the magnet and the coil winding. The rotor mounting structure is more stable, and the rotation is smooth and stable, so that the phenomenon that the rotor shakes relative to the stator to form vibration so as to resonate noise is avoided or reduced; the distance between the main bearing and the center of the rotor is shortened, the assembly structure is stable, and vibration harmonic noise can be reduced.

The invention discloses a spherical roller bearing entity simulation method, device and equipment and a medium, and relates to the technical field of wind power generation. According to the scheme, when the finite element mesh model of the spherical roller bearing is constructed, the rollers are connected to the bearing inner ring and the bearing outer ring through the spring units, that is, traditional finite element constraint is replaced with the mode that the rollers are constrained through the spring units, and the conventional constraint limitation in finite element simulation is broken through; accurate analysis of bearing roller contact in a complete machine model is realized; after a complete machine finite element mesh model is generated based on a model of the spherical roller bearing, simulation parameters and loading parameters of the complete machine finite element mesh model are set, the simulation parameters at least comprise a working clearance between a roller and a raceway, that is, contact offset is added to simulate the existence of the radial clearance of the bearing, and the loading parameters of the complete machine finite element mesh model are set. The problem of simulation of play contact of the SRB main bearing under the working condition of high axial force is solved, and three-dimensional balance of physical authenticity, calculation efficiency and engineering applicability is achieved.

The invention discloses a magnetic suspension water-lubricated hybrid bearing, which comprises a magnetic suspension bearing and a water-lubricated bearing, the magnetic suspension bearing comprises a stator core, a stator coil and an insulating pouring sealant, the water-lubricated bearing comprises a bushing and a bearing bush, and the magnetic suspension water-lubricated hybrid bearing also comprises an intelligent monitoring and control system consisting of a power amplifier, a controller, a displacement sensor and a circuit thereof; when the magnetic conductive metal material rotating shaft supported by the magnetic suspension bearing and the water lubricated bearing is in working conditions such as starting, stopping, low speed or overload, the controller controls the power amplifier to enable the magnetic suspension bearing to enter a working state to provide main bearing force for the rotating shaft, and friction and abrasion of the bearing bush are effectively reduced; when the rotating shaft is in a high-speed and stable working condition, the controller controls the power amplifier to reduce the current and the electromagnetic force of the magnetic suspension bearing, so that the supporting effect of the magnetic suspension bearing is weakened, the water-lubricated bearing is in a stable hydrodynamic lubrication stage, main bearing force is provided for the rotating shaft, and the power consumption of the magnetic suspension bearing is effectively reduced.

The invention relates to a tool for testing mechanical sealing performance. The tool comprises a main shaft, the bearing module comprises a bearing box and a bearing cover which are in sealed connection with each other, and a cavity wrapping part of the main shaft is formed in the bearing box and the bearing cover; the mechanical sealing module is arranged on the outer wall of the section, penetrating through the cavity, of the main shaft; the adjusting ring structurally comprises a core shaft and an outer ring which are connected with each other, and the core shaft and the main shaft are connected and rotate synchronously; the sealing test module comprises a sealing tank which is connected to the end part of the bearing box in a sealing manner, the sealing tank is connected with an adjusting screw which is located on the same axis with the main shaft, and the adjusting screw abuts against the adjusting ring and spirally controls the adjusting ring to axially move along the cavity; and an environment simulation module. The device is compact and reasonable in structure and convenient to operate, the actual working conditions of short-time operation in a high-temperature air environment and long-time operation in a high-pressure deepwater environment can be effectively simulated, and the performance and the service life of the mechanical sealing module under different environment conditions are evaluated.

The utility model discloses a large-cylinder-diameter diesel engine main bearing cap dismounting device which comprises a hoisting unit, lower sliding rail assemblies and a main bearing cap supporting unit, hoisting sliding rail assemblies of the hoisting unit are fixed to the two sides of the upper portion of a rack, and the lower sliding rail assemblies are supported on oil pan rib plates respectively. Supporting rods of the main bearing cover supporting unit are vertically supported at the two ends of the beam respectively, the upper ends of the supporting rods are fixedly connected with the lower ends of main bearing cover screws respectively, the lower ends of the supporting rods are hinged to the two ends of the beam respectively, and a top block of the main bearing cover supporting unit is fixedly connected with the center of the lower side of the main bearing cover. According to the main bearing cap dismounting device, the working efficiency of dismounting the main bearing cap and the operation safety are remarkably improved, the labor intensity of dismounting the main bearing cap is greatly reduced, and the problem of dismounting the main bearing cap of a large-cylinder-diameter diesel engine is solved.

An electric motor including a motor casing, a shaft having an axis of rotation, a first end and a second end, a first main bearing for rotatably supporting the shaft at the first end within the motor casing, a second main bearing for rotatably supporting the shaft at the second end within the motor casing, and a grounding bearing for conducting a bearing current between the shaft and the motor casing.

The utility model relates to a multi-size wafer spin-drying mechanism and a wafer cleaning system, the multi-size wafer spin-drying mechanism comprises a workbench, a spin-drying assembly and a spraying assembly, the spin-drying assembly comprises a rotating motor, a main shaft, a bearing disc, a supporting column and a blocking column, and the rotating motor is connected with the bearing disc through the main shaft; the top end of the bearing disc is provided with at least one set of supporting columns capable of supporting the bottom end face of a wafer and at least one set of blocking columns capable of limiting the edge of the wafer, and the blocking columns are correspondingly arranged on one sides of the supporting columns and higher than the supporting columns. The spraying assembly comprises a swing rod air cylinder and a spraying head, the swing rod air cylinder is connected with the spraying head, and the spraying head is correspondingly arranged above the bearing disc. The multi-size wafer spin-drying mechanism and the wafer cleaning system can be used for cleaning and spin-drying wafers of various sizes or types, multiple purposes are achieved, the application range of the cleaning system is greatly widened, meanwhile, liquid splashing during spin-drying can be avoided, and the surrounding environment of equipment is guaranteed.

The invention relates to a unit state analysis method and system based on a centralized control system. The method comprises the steps that bending deformation parameters of a rotating spindle are continuously obtained; drawing vibration amplitude curves associated with the rotating blades according to the deformation parameters, wherein each rotating blade has one vibration amplitude curve; the similarity of any two vibration amplitude curves is compared, the overlapping position is determined, the state of the rotating blade is determined according to the overlapping position, the state of the rotating blade comprises a normal rotating state, an inclined rotating state and a vibration state, and when the state of the rotating blade is determined, the temperature distribution parameter of the main bearing and the vibration parameter of the rotating blade are obtained. According to the unit state analysis method and analysis system based on the centralized control system, the working state of the rotating blade is determined by analyzing the rotating main shaft, meanwhile, auxiliary judgment is conducted by means of existing sensors at other positions, and unit state analysis can be achieved under the condition that the number of sensors is limited.

The invention discloses a self-clearance-eliminating cycloidal pin gear speed reducer, and aims to solve the double pain points that in the prior art, an assembly clearance is difficult to control, and the clearance cannot be compensated after abrasion. The speed reducer comprises a machine shell, a main bearing, an output flange, a cycloidal gear, a conical pin and an elastic pressing piece, and is characterized in that the conical pin, cycloidal teeth of the cycloidal gear and a pin groove of the machine shell are all provided with the same taper, the elastic pressing piece is installed on the machine shell and exerts pre-compression force on the pin, and the elastic pressing piece, the conical pin and the pin are made to be tightly attached to eliminate an initial gap; after abrasion, the elastic pressing piece can push the conical pin needle to conduct self-adaptive gap compensation along the conical surface, and the meshing stability is guaranteed through the taper self-locking characteristic. Meanwhile, the structure can be flexibly matched with three transmission modes of'a first-stage planetary gear and a second-stage cycloid ', 'single-stage cycloid cam shaft driving' and'single-stage cycloid cam shaft and a cross slide block ', the effects of reducing machining and assembling cost, maintaining transmission precision for a long time and reducing maintenance loss are achieved, and the structure is suitable for the field of precision transmission.

The present invention belongs to the field of bearing technology, and proposes a tool and method for limiting the shape and maintaining the roundness of the induction quenching of a single-row conical main shaft bearing ring of a wind power plant. The tool body of the tool body is annular; the lower end of the inner wall of the tool body has an annular step; a radial heat-absorbing support plate is also arranged in the tool body, and the radial heat-absorbing support plate is a multi-section arc plate; the arc length of each section of the radial heat-absorbing support plate is 4 to 6 times the length of the heating affected zone; the multi-section radial heat-absorbing support plate is in surface contact with the workpiece to be processed after pre-tightening; the radial heat-absorbing support plate is pressed in the tool body by a plurality of pre-tightening adjustment pins distributed along the circumference; a radial pre-tightening screw is arranged on the tool body corresponding to each pre-tightening adjustment pin; the circumference of the tool body has a plurality of cooling water holes for installing cooling water pipes. The present invention effectively solves the problems of elliptical deformation, end face warping and uneven shrinkage of a single section of the workpiece when the large-diameter thin-walled wind power main bearing ring is induction quenched without a soft belt.