443 results about "Main bearing" patented technology

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 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 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 invention discloses a transmission system of a wind turbine generator, which comprises a main shaft system comprising a main bearing seat and a main shaft, and the main shaft is arranged in the main bearing seat through a front bearing and a rear bearing respectively; the wind power gear box comprises a first-stage planet assembly, a front middle box body, a second-stage planet assembly, a rear middle box body, a third-stage planet assembly and a motor bearing seat which are sequentially arranged, the first-stage planet assembly comprises a first-stage planet carrier and a first-stage inner gear ring, at least one part of the first-stage planet carrier is installed in the front middle box body, and the upwind direction end face of the first-stage planet carrier is connected with a main shaft; an outer spigot is arranged on the downwind end face in the circumferential direction, and an inner spigot is arranged in the front middle box body in the circumferential direction. On the other hand, the invention further discloses an assembling method of the transmission system of the wind turbine generator. According to the transmission system, the outer seam allowance and the inner seam allowance are formed in the first-stage planet carrier and the front middle box body, the first-stage planet carrier is supported, and the risk that a first-stage planet assembly directly falls on a first-stage inner gear ring, and consequently the tooth surface is crushed is avoided.

The invention discloses an engine main bearing resonance parameter determination method and device, equipment and a medium, and relates to the technical field of mechanical state monitoring, and the method comprises the steps: obtaining a current working condition parameter of a target engine, and detecting whether the current working condition parameter meets a state threshold condition in a corresponding cruise state or not; if yes, acquiring corresponding equipment characteristic parameters, acquisition configuration parameters and original vibration data, determining fault characteristic frequency of each element of the main bearing of the target engine, acquiring harmonic amplitude of each order corresponding to the fault characteristic frequency, and constructing a target function; performing global optimization on the target function by using a preset swarm intelligence optimization algorithm according to the target constraint condition to obtain a first resonance parameter; when it is monitored that the impact signal performance index extracted based on the first resonance parameter is lower than a preset threshold value, the first resonance parameter serves as a search starting point, local optimization is conducted on the target function, and a second resonance parameter is output. And the most suitable resonance parameter is automatically selected in the actual operation process.

The invention relates to the technical field of industrial data processing, and particularly discloses a fault prediction method for automobile motor production equipment based on machine learning, which comprises the following steps: synchronously acquiring vibration data of a main bearing and working condition data of a main shaft motor, and calculating a learning admission factor based on a deviation degree between the working condition data and a preset standard working condition; performing weighted gating on the basic drift learning rate of the dynamic baseline model by using the learning admission factor, and further updating a baseline mean value and a slow variation fluctuation rate; and calculating an instantaneous fluctuation ratio based on the instantaneous energy deviation of the vibration data and the updated baseline mean value, determining the ratio of the instantaneous fluctuation ratio to the slow fluctuation ratio as a working condition sudden change index, identifying the current working condition type and obtaining a corresponding adaptive threshold value, and when the working condition sudden change index exceeds the adaptive threshold value, judging that a fault is generated. According to the method, immunity to transient working conditions and sensitive detection to weak mutation in a steady state can be realized at the same time, and the accuracy and robustness of fault prediction are greatly improved.

The invention relates to an active gravity compensation spacecraft cabin separation test system and method. The test system is mainly composed of a tension control system, a comprehensive control system, a high-speed measurement subsystem, a system support subsystem and other subsystems. The tension control system and the comprehensive control system are closed-loop control systems taking a high-precision and fast-response torque motor as a core; the high-speed measurement system is used for acquiring parameters such as the inter-cabin separation speed and the angular speed, and performing whole-course monitoring on the state of an inter-cabin separation surface; the system support is a main bearing structure of the tension control system and the separation cabin section, provides a separation simulation space for a spacecraft, and provides an operation platform for ground workers at the same time. By adopting the test system disclosed by the invention, the vertical separation of the large spacecraft during ground development can be realized, the gravity unloading efficiency is as high as 95-105%, and effective separation parameters are obtained.

The invention relates to the technical field of structure detection and analysis, in particular to a wind turbine generator blade damage type analysis method and system. The method comprises the following steps: acquiring blade surface crack detection image data and a blade three-dimensional structure model, mapping the blade surface crack detection image data into a crack space coordinate point set by utilizing space projection matrix transformation, and establishing a crack structure attribution node; establishing a structural load distribution model, calculating a stress transfer weight coefficient of a bearing path to which the affiliation node of the crack structure belongs, and generating a bearing path weight distribution table according to a node connection relationship of the bearing path; correspondingly matching the crack space position distribution set with the bearing path weight distribution table to form a crack risk analysis matrix; and the crack type of each crack is judged, and a main bearing path crack type and a non-main bearing path crack type are obtained through classification. According to the invention, crack risk quantification and damage type determination are realized, and the corresponding relation between the appearance crack and the internal bearing risk is established.

[Problem] To reduce the size and weight of a main bearing for supporting a drive shaft that drives a compression mechanism. [Solution] An electric compressor (10) comprises a drive shaft (61) that drives a compression mechanism (70), a motor (60) that drives the drive shaft (61), a motor housing (20) that defines a motor chamber (21) into which a refrigerant sucked from an external refrigeration cycle is introduced, a compression mechanism housing (30) having a discharge chamber (32) from which the compressed refrigerant is discharged, and a pressure equalization means (120). The drive shaft (61) has a first end surface (61c) disposed in the motor housing (20), a second end surface (61d) disposed in the compression mechanism housing (30), and a portion (61a) supported by a rolling bearing (111) between the motor (60) and the compression mechanism (70). The pressure equalization means (120) equalizes the pressure acting on the first end surface (61c) and the second end surface (61d).

The utility model belongs to the technical field of CT machine main bearing damping, and particularly relates to a high-speed CT machine main bearing damping device which comprises a limiting block. Connecting blocks are fixedly connected between the multiple limiting blocks. Inner rings of double-row angle bearings are fixedly connected to the side walls of the multiple connecting blocks. A connecting rod is slidably connected into the limiting block. The ends of the two connecting rods are fixedly connected with fixing blocks, and the other ends of the two connecting rods are fixedly connected with centrifugal blocks. A fixed convex block is fixedly connected to the side wall of the centrifugal block; clamping wheels are fixedly connected between the corresponding fixing protruding blocks, and the multiple clamping wheels are arranged corresponding to the size of the double-row angle bearing. According to the utility model, the plurality of clamping wheels are arranged to extrude the inner ring of the double-row angle bearing which rotates at a high speed, so that the inner ring and the outer ring of the double-row angle bearing are tightly attached, the vibration condition caused by a raceway structure error and a ball size error is further reduced, the negative influence of bearing vibration on CT imaging is favorably relieved, and the imaging quality of a CT machine is improved.

The invention relates to a crankshaft for an internal combustion engine. In particular, the invention relates to a crankshaft having at least one crankshaft segment, comprising at least one disk-shaped crank web, arranged with rotation symmetry relative to a crankshaft axis and carrying a main bearing surface that rotates around a crankshaft axis, and a crank pin that is arranged eccentric to the crankshaft axis and extends parallel to the crankshaft axis.

The present application relates to the technical field of mechanical fault diagnosis, and particularly relates to an engine main bearing quantitative diagnosis method based on adaptive filtering and impact enhancement; comprising the following steps: S1, using a pulse mode decomposition method, carrying out pulse mode extraction, and obtaining a residual signal of the extracted pulse mode; comprising the following steps: S11, assuming a pulse mode, obtaining a pulse mode sparsity quantitative index of the pulse mode; S12, constructing an adaptive filter set, extracting the pulse mode according to the adaptive filter set, and thus obtaining a residual signal; S2, based on the residual signal obtained in step S1, reconstructing a signal of a signal collected by the engine main bearing, and obtaining a reconstructed pulse envelope; S3, according to the pulse envelope, obtaining a standard decibel of the impact pulse value, and according to the standard decibel, evaluating the health state of the main bearing; the effectiveness of the diagnosis of the aero-engine main bearing is improved.

This application discloses a harmonic reducer with integrated torque detection. The harmonic reducer includes: a rigid internal gear having an annular body, with a first gear tooth profile on the inner side of the annular body; a flexible external gear with a second gear tooth profile on its outer side meshing with the first gear tooth profile; a wave generator disposed inside the flexible external gear and configured to cause elastic deformation of the flexible external gear and mesh with the rigid internal gear; a main bearing including an inner ring and an outer ring, the inner ring being fastened to the flexible external gear, and the outer ring being connected to the rigid internal gear via a fixed connecting device; and a torque detection device including a strain element disposed on the inner or outer peripheral wall of the fixed connecting device, the torque detection device being configured to detect the torque transmitted by the rigid internal gear by detecting changes in the strain element. This technical solution integrates torque detection functionality into a harmonic reducer.

The utility model provides a scroll compressor which comprises a static scroll plate, and the static scroll plate is provided with an exhaust cavity, a first hole and a second groove communicated with the exhaust cavity. The middle machine body is positioned below the static scroll plate and is provided with a second hole communicated with the first hole; the main bearing is positioned below the middle machine body; the hole pipe filter is mounted in the first hole, and a through hole communicated with the second hole is formed in the bottom of the hole pipe filter. According to the scroll compressor, the hole pipe filter is directly installed on the static scroll plate, the oil way design is optimized, lubricating oil directly lubricates the main bearing after being filtered, the problems that in the prior art, the filtering effect is poor, the oil way is complex, and lubrication of the main bearing is insufficient are effectively solved, and the performance and reliability of the scroll compressor are improved.

This invention relates to the field of wind turbine technology, specifically to a wind turbine main shaft structure. The wind turbine main shaft structure includes a hub, a transmission frame, a main shaft, a nacelle base, a main bearing, and a rear bearing. The hub and transmission frame are respectively connected to both ends of the main shaft. The nacelle base has a main bearing seat and a rear bearing seat at both ends along the axial direction of the main shaft, with the main bearing connected to the main bearing seat and the rear bearing connected to the rear bearing seat. The main shaft is rotatably connected to the nacelle base via the main bearing, and the transmission frame is rotatably connected to the nacelle base via the rear bearing. The transmission frame is used for transmission connection with the generator. This wind turbine main shaft structure reduces the weight and load of the unit components, and the segmented design of the main shaft reduces the difficulty of main shaft machining. The structural installation design of the front and rear bearings improves the rigidity of the entire transmission chain and eliminates the requirement for vibration-damping torque arms in independent shaft transmission chains.

This invention discloses a method for evaluating the load-bearing state of radial rollers in a tunnel boring machine (TBM) main bearing. Based on the crowning characteristics of the radial rollers in the TBM main bearing, this invention determines the roller crowning clearance, establishes and solves static equilibrium equations, overturning moment equilibrium equations, and radial displacement relationship equations. By summing the radial displacement values, the contact deformation of the rollers in the bearing is obtained. The radial displacement records of the rollers in the bearing are measured under actual radial force and overturning moment conditions. The load-bearing state of the rollers is evaluated by comparing the magnitudes of the roller contact deformation and radial displacement records. This evaluation method can more accurately detect the specific locations of potential risks inside the bearing, providing technical guidance for the monitoring and diagnosis of bearing rollers and ensuring the operation and maintenance of TBM bearings.

A roll press rolls each including an upper roll and a lower roll that are supported by a main bearing at both ends and rotate at a predetermined speed, upper and lower bending bearings that are disposed outside each of the main bearings and correct deflection of the press rolls by receiving a bending load, an upper reverse operation bending mechanism provided in the upper roll that operates with hydraulic oil, a lower reverse operation bending mechanism provided in the lower roll, and two upper reverse operation bending mechanisms and two lower reverse operation bending mechanisms being installed in the upper and lower bending bearings, respectively. Deflection occurring in the upper roll and the lower roll is corrected by causing the upper reverse operation bending mechanism or the lower reverse operation bending mechanism to generate downward power or upward power, respectively.

The application discloses a kind of automobile steering mechanism collision test clamping devices, belong to automobile steering mechanism production processing field.Worker presses pressing piece from outside to inside, pressing piece is pushed to pressure-bearing cylinder inside, so that pressure-bearing ball is pressed to the side end surface of main bearing hole, to impact collision to the side end surface of main bearing hole, detect main bearing hole after being impacted, pressing piece under extrusion will its inner cavity pre-stored gas be injected to the side of main bearing hole by permeable cavity, to the main bearing hole for injection treatment, to simulate the use of knuckle under strong wind environment, the outer surface of steering gear is contacted by the outer end surface of polishing ball, the outer surface of steering gear is contacted with polishing ball, when the whole device moves or swings, polishing ball continuously impacts the outer surface of steering gear, can simulate the use effect of steering gear under strong impact, whether reach its expected durability fatigue degree, and the connecting part of steering gear is clamped.

A powertrain for a wind power installation includes a main bearing unit with a main shaft, and a planetary transmission driven by the main shaft and including a transmission housing and a planetary stage which revolves about a rotation axis in the transmission housing. The planetary stage includes a planet carrier, a ring gear, and a sun gear, with the planet carrier or the ring gear being drivingly connected, at least indirectly, to the rotor. The planet carrier includes planet gears which revolve conjointly with the planet carrier and alternately mesh with the ring gear and the sun gear. At least three guide elements disposed circumferentially about the rotation axis are each operatively connected alternately to the transmission housing and a circumferential region of the planet carrier. Each guide element is constructed of multiple parts and includes guide jaws disposed on axial sides of the planet carrier, respectively.

The invention provides a high-stability stainless steel low-magnetism crane which comprises a main support, two main bearing seats are arranged on the main support in a sliding mode, two transverse columns and two supporting rails are fixed between the two main bearing seats at intervals, and two supporting wheels are arranged on the supporting rails in a rolling mode. A supporting table is arranged between the two supporting wheels, the supporting wheels are fixed to the supporting table through connecting rods, the two transverse columns penetrate through the supporting table and are in sliding connection with the supporting table, a hoisting mechanism is installed at the bottom of the supporting table, and two transverse lead screws are movably arranged between the two main bearing seats; one ends of the two transverse lead screws extend out of the main bearing seat and are provided with first bevel gears, a limiting seat is fixed to one side of the main bearing seat, a rotating shaft is movably arranged on the limiting seat, and the problem that an existing stainless steel low-magnetism crane is poor in stability in the workpiece transporting process is solved.

The invention provides a compressor and refrigeration equipment. The compressor comprises a rotating shaft, a main bearing for bearing the rotating shaft and a compression assembly arranged on the rotating shaft, and the compression assembly comprises a first-stage impeller connected to the rotating shaft; the second-stage impeller is connected to the rotating shaft and is configured to compress exhaust gas of the first-stage impeller; the bearing support and the rotating shaft are coaxially arranged on the radial outer side of the rotating shaft, the bearing support is located between the first-stage impeller and the second-stage impeller, and the bearing support comprises a diffusion structure used for forming a first-stage diffusion flow channel for exhausting of the first-stage impeller and a protection bearing mounting part; and the air floatation protection bearing is arranged on the rotating shaft in a sleeving manner and is mounted in the protection bearing mounting part. The compressor provides radial support for the rotating shaft rotating at a high speed by arranging the air floatation protection bearing, so that the safety and reliability of the compressor are improved and the service life is prolonged.

The invention relates to a device (12, 14, 16), preferably a rotary device, for treating containers for a container treatment plant (10). The device (12, 14, 16) comprises a part (20), a rotary bearing (22) which rotatably supports the part (20), and a vibration sensor (26) which is arranged on the rotary bearing (22) to detect mechanical vibration of the rotary bearing (22). Advantageously, this technique allows critical bearing points, such as main bearings, ball joints, etc., to be monitored by means of vibration monitoring in order to predict wear or impending failure. It has been recognized that mechanical vibration monitoring is particularly advantageous in this context because it can detect wear and failure of a bearing much earlier and much more accurately than, for example, pure temperature monitoring or acoustic monitoring.

The invention discloses a bolt friction coefficient verification method and device, electronic equipment and a storage medium, and relates to the technical field of engine dynamic analysis. The method comprises the steps of determining tightening process parameters corresponding to a plurality of sample bolts under a target strength grade based on a preset bolt plastic tightening rule; on the basis of the tightening process parameters, tightening a sample bolt between a main bearing cover and a cylinder body of the engine; determining at least one target bolt conforming to the durability test from the sample bolts, and determining a final tightening torque data set corresponding to the at least one target bolt; and performing morphological analysis on the final tightening torque data set according to a preset torque analysis rule, and determining a target friction coefficient of the target bolt. The target friction coefficient of the target bolt is accurately verified, the slipping risk of the target bolt in the screwing process is reduced, the risk that the target torque of the target bolt is reduced is reduced, the service life of an engine is further prolonged, and potential quality hazards are reduced.

The invention discloses a heavy-load tapered roller bearing, and relates to the technical field of heavy engineering machinery. A bearing outer ring and two symmetrically arranged bearing inner rings are arranged, guide flanges are arranged on the two sides of the inner wall of the outer ring, a stamping retainer is assembled to be connected with a pocket retainer, tapered rollers are evenly distributed on one side wall of the retainer, and a roller set is arranged between every two adjacent rollers; an annular positioning rib in the middle of the roller set is attached to a pocket protective ring to prevent displacement, retention grooves in the two ends guide conical rollers to move through polished annular guide edges, heavy loads are synergistically dispersed, conical surface racing tracks are formed in the two ends of the outer ring, main bearing rollers are arranged in the outer ring, and stress concentration is prevented through arc transition parts on the edges of the racing tracks. The outer ring and the protective ring are provided with lubricating channels communicated with the racing tracks. A grease injection channel is formed between the outer ring and one inner ring; the middle of the inner ring penetrates through one end of a locking screw to be embedded into a wrench meshing groove, the other end of the locking screw is connected with a pre-tightening nut to be embedded into a sealing lip grease storage cavity, a sealing lip with a wear-resistant coating and a finger groove is embedded into the other inner ring locking groove, an annular oil storage groove is formed in the outer wall of the inner ring to supplement grease, and heavy-load long-acting operation is guaranteed.

The invention relates to a five-engine parallel rack of a liquid rocket engine. The five-engine parallel rack comprises a main supporting structure and a servo supporting structure, the main supporting structure is used for bearing thrust of an engine and comprises a rack upper end face, a rack lower end face, two pairs of inclined supporting rods and a plurality of pairs of main force bearing rods. After the support is in place, when the rocket is horizontally placed, the extension set I, the extension set IV and the extension set V are located below the axis of the rocket, and the extension set II and the extension set III are located above the axis of the rocket; except the V extension set, each of the other extension sets corresponds to one servo supporting structure, the upper end of each servo supporting structure is fixed on the upper end face of the rack, and the lower end of each servo supporting structure is fixed on the lower end face of the rack; the servo mechanisms are installed on the servo supporting structures and used for driving the corresponding extension sets, and each servo supporting structure is used for bearing servo acting force of the corresponding servo mechanism. The five-engine parallel-connection thrust transmission requirement is met, and meanwhile the five-engine parallel-connection thrust transmission device adapts to the non-cyclic symmetrical layout form of five engines.

The present invention provides a rotating device and a gear device that can reliably connect a rotating body and a race, and that can simplify and miniaturize the bearing structure. [Solution] The reduction gear of the embodiment comprises a case 2 and a carrier 3, and a main bearing 6 that supports the case 2 and the carrier 3 so as to be rotatable relative to each other. The main bearing 6 comprises an outer race 31 and an inner race 32, and rolling elements 33. At least one of the case 2 or the carrier 3 is cast with either the outer race 31 or the inner race 32, and an intermediate layer 50 is formed between the first race joining surface 32c and the second race joining surface 32e and the first substrate joining surface 40a and the second substrate joining surface 40b.

The invention relates to intelligent logistics equipment, in particular to a vacuum chamber equipment transfer and installation system which comprises a main bearing transfer trolley, auxiliary installation equipment and a transfer frame, the main bearing transfer trolley is provided with a set of first rails, and the first rails are consistent with rails in a vacuum chamber; the auxiliary mounting equipment comprises a chassis frame, a bearing platform and a plurality of transfer frame mounting ends, the transfer frame mounting ends are all arranged on the bearing platform, the bearing platform is connected to the chassis frame, and the bearing platform is suitable for moving in the X direction and the Y direction relative to the chassis frame. The chassis frame is connected to the main bearing transfer trolley, the chassis frame is suitable for moving relative to the first track, the top of the transfer frame is used for being connected with a workpiece to be transferred, and the bottom of the transfer frame is connected to the transfer frame mounting end. According to the invention, the transfer and assembly efficiency of large-size and large-tonnage workpieces mounted in the vacuum cabin can be improved.

The application provides a dynamic weighing device, which comprises a main shaft, a bearing assembly and a weighing assembly; the bearing assembly comprises a motor housing, a driving assembly, a bearing disc assembly connected to the driving assembly, a lifting flange connected to the motor housing, a knuckle bearing arranged on the inner side of the lifting flange and a pressure sensor; the driving assembly has a driving shaft connected to the main shaft; the bearing disc assembly is sleeved on the outer side of the main shaft and arranged on the inner side of the knuckle bearing; the pressure sensor is clamped between the lifting flange and the knuckle bearing along the axial direction of the main shaft; the weighing assembly comprises a material cabin assembly connected to the bearing disc assembly, a discharging assembly sleeved on the outer side of the main shaft, a rotating speed sensor and a torque sensor; the discharging assembly comprises an automatic discharging disc rotatable relative to the main shaft and a driving discharging disc rotatable along with the main shaft; the rotating speed sensor is arranged in the material cabin assembly and connected to the material cabin assembly in correspondence with the automatic discharging disc; and the torque sensor is attached to the outer surface of the main shaft along the circumferential direction of the main shaft.