1408 results about "Thrust bearing" patented technology

The invention discloses an electromagnetically-supported hybrid magnetic thrust bearing structure and a suspension force design method, and provides a hybrid magnetic bearing structure design in which radial alternate magnetization is adopted in the axial direction, a permanent magnet bearing formed by stacking multiple layers of magnetic rings bears all axial thrust loads, and radial electromagnetic bearings are assisted at the two ends to maintain dynamic stability of a rotor. The performance requirements of high bearing capacity, low power consumption, good active control capability and high dynamic stability of the hybrid magnetic thrust bearing in a limited space are met; in order to solve the problems that an inner magnetic ring and an outer magnetic ring are not strictly centered due to the influence of machining precision, an assembly process, rotor eccentricity and the like during actual operation of a permanent magnet thrust bearing, additional unbalance load, dynamic unbalance load and the like are generated in the radial direction. The electromagnetic supporting suspension force design method comprehensively considers the radial unbalance load of the permanent magnet thrust bearing, the dynamic unbalance load of the rotor and the self-weight influence, effective calculation of the suspension force of the supporting rotor is achieved, and important technical support is provided for the hybrid magnetic thrust bearing structure and suspension force design iteration.

The invention relates to the technical field of fault diagnosis, and discloses a scroll compressor thrust bearing fault diagnosis method and system based on artificial intelligence. The method comprises the following steps: acquiring an original vibration signal of the thrust bearing of the scroll compressor through a piezoelectric acceleration sensor array, and performing angle domain synchronization and modal decomposition on the original vibration signal to obtain a demodulated vibration signal; according to the demodulation vibration signal, extracting fault characteristic frequency spectrums of inner ring damage, outer ring crack, rolling body peeling and retainer deformation in the scroll compressor thrust bearing; extracting fault features from a time domain, a frequency domain and a time-frequency domain based on the fault feature frequency spectrum, and constructing a fault feature vector; and inputting the fault feature vector into an integrated learning model to carry out fault identification analysis to obtain a fault type and severity. According to the invention, the accuracy of fault diagnosis of the thrust bearing of the scroll compressor is improved.

The invention provides a transmission chain and a wind generating set. The transmission chain comprises a bearing seat, a transmission shaft and a transmission shaft, the main shaft is rotatably supported in the bearing seat and is provided with a front end and a rear end which are opposite to each other; the gear box comprises a box body and a planet carrier arranged in the box body, the box body is fixedly connected with the rear end of the bearing seat, and the planet carrier is rigidly connected with the rear end of the main shaft; and the thrust bearing is arranged in the gear box. According to the transmission chain, the overall structure is compact, the shafting and the gearbox are highly integrated, and the transmission chain has the advantages of being light in weight, low in overall cost and the like.

A centrifugal compressor includes a rotary shaft, an electric motor, an impeller, a thrust bearing, and a housing having a passage that includes a motor cooling passage and a bearing cooling passage. The housing includes an inner housing and an outer housing. The motor cooling passage is defined by the inner housing and the outer housing. The passage includes a branching passage through which cooling fluid is divided and flows into the motor cooling passage and the bearing cooling passage and a joining passage through which the cooling fluid flowing through the bearing cooling passage joins the cooling fluid flowing through the motor cooling passage. The motor cooling passage includes a guide wall that guides the cooling fluid flowing through the motor cooling passage.

The invention belongs to the technical field of mechanical transmission, and discloses a conductor ring and magnetic resistance array composite permanent magnet thrust bearing and a damping force calculation method. The conductor ring and magnetic resistance array combined type permanent magnet thrust bearing realizes the bearing of non-contact magnetic thrust through the combination of the eddy current ring and the magnetic group array. When thrust from a propeller at the stern end of a propulsion shafting acts, the rotor magnetic group array axially moves, axial traction force is generated between the rotor magnetic group array and the stator magnetic resistance array to counteract the thrust action from the axial direction, meanwhile, the magnetic group array cuts the vortex ring, induction damping is generated on the surface of the vortex ring, damping force is formed, and the vortex ring is driven to rotate. And therefore, the longitudinal vibration during transmission of the propulsion shafting is reduced, and the propulsion shafting system is more silent and stable during operation. In addition, the damping force calculation method does not need complex three-dimensional structure modeling and grid division, is simple in solution, high in universality and short in calculation time consumption, and has high engineering application practical value.

The invention discloses a multifunctional angle module test bench which is composed of a bench base, a load simulation device and a pavement simulation device. The bench base is provided with a lifting sliding column, and the height of a loading platform can be adjusted to adapt to suspension deformation; the load simulation device realizes vertical load adjustment by increasing or decreasing balancing weights; the pavement simulation device integrates a belt pulley shaft, a motor, a magnetic powder brake and a pressure oil cylinder, and simulates pavement resistance through belt rolling; during testing, the angle module body is fixed to a loading platform, tires make contact with a belt to achieve dynamic testing, a magnetic powder brake increases resistance torque for a main belt wheel shaft so as to simulate different road conditions, a motor drives the belt to test regenerative braking performance, and a pressure oil cylinder is matched with a thrust bearing to measure axial loads. The steering resistance and tire mechanical property test is completed by changing the included angle between the wheel and the belt motion direction; according to the invention, driving, braking, steering and suspension system testing functions are integrated, and multi-working-condition comprehensive performance detection is realized.

The invention relates to the technical field of speed reducers, in particular to a multi-stage coaxial speed reducer which comprises an outer cylinder, a first-stage gear ring and a second / third-stage gear ring are arranged in the outer cylinder, and a first-stage speed reducer, a second-stage speed reducer and a third-stage speed reducer are sequentially arranged in the outer cylinder. The first-stage planet carrier framework is axially fixed, and the second-stage planet carrier framework and the third-stage planet carrier framework axially float; gaskets / thrust bearings are arranged between stages to achieve axial supporting and friction reduction, and the last-stage three-stage planet gears adopt staggered-tooth gears to eliminate meshing clearances. Through the coaxial compact integrated design, the large reduction ratio and the compact structure are both considered; due to the lubricating circulation design of inter-stage antifriction supporting and self-adaptive rotating speed, the friction loss is greatly reduced, and the transmission efficiency is improved; the structure of staggered tooth clearance eliminating, elastic buffering and shaft system stabilizing effectively reduces gear abrasion and impact loads, remarkably prolongs the service life, has the advantages of being high in transmission precision, fast in response and stable in operation, and can be used for precise transmission, automobile active stabilizer bars and other scenes.

A fall-arrest device (1,26) for use during rope-climbing activities, the device comprising or including a housing (5) for rotatably receiving therewithin a brake wheel (11,30) supported on an axle (20), the housing including anchor means (3,4) permitting connection of the device to a user thereof, the brake wheel having peripheral teeth (17,29) adapted to, in use, engage with a mid-portion of an anchored safety rope (2), the housing being openable by a gate (5a) through which to receive part of the anchored safety rope and thereafter being closable to trap the safety rope between the teeth of the brake wheel and a rope bearing thrust surface (18,28) on or in the housing, the brake wheel having associated automatic locking means (23,24), preventing rotation of the brake wheel about the axle above a nominal rate of rotation, the brake wheel locking means being spring-biased (14) to a stored position when the brake wheel is stationary or rotates below the nominal rate during use, the brake wheel locking means (24) being movable from the stored position to an operable position in which it engages with one or more locking formations (23) preventing further rotation of the brake wheel about the axle, the brake wheel axle being drivingly secured at at least one end thereof to a respective pinion (13a, 13b) having teeth extending radially therefrom, the teeth of the or each pinion being engageable with a respective toothed rack (12a, 12b,27) fixed to the inside of the housing whereby to permit the brake wheel to assume a path of movement further towards the thrust bearing surface such that when rotation of the brake wheel exceeds the nominal rate and has been arrested, such that when the rate of rotation of the brake wheel relative to the anchored rope exceeds the nominal rate, the axle and brake wheel are progressively driven further towards the thrust bearing surface to thereby cause the teeth of the brake wheel to progressively bite into the rope and arrest downward movement of the device along the rope.

The invention discloses a self-adaptive cutter system for brake disc machining. The self-adaptive cutter system comprises a cutter handle, a cutter disc, a cutting blade, a suspension sleeve, an electromagnet and a control system. The permanent magnet is embedded in the circular truncated cone section of the cutter handle, the suspension sleeve is circumferentially fixed to the cutter head through the flat key, the flat key is pasted with the strain gauge to detect cutting force in real time, and the electromagnet and the permanent magnet are oppositely arranged in the radial direction to form magnetic suspension supporting. And the control system adjusts the current of the electromagnet according to the strain signal, dynamically adjusts the radial rigidity and the suspension position of the cutterhead, and realizes axial-radial decoupling support in combination with the thrust bearing. In a preferable embodiment, the cutting blade realizes micron-order cutting depth adjustment through a piezoelectric ceramic driving gasket, the service life of the cutter is prolonged due to the alternative opening design of a cutter head mounting boss, and the problem of winding of a rotating lead is solved by a conductive slip ring assembly. Working conditions such as sand holes and hardness sudden change can be responded in real time, broadband vibration is restrained, the machining precision is improved, the service life of the cutter is prolonged, and the method is suitable for high-precision brake disc machining.

The invention discloses an air floatation lifting rotating platform, and belongs to the technical field of precise instruments, the platform comprises a base, a slide block and an objective table, the slide block maintains a suspension state in the base through gas power and can respond to an external load in the vertical direction to carry out position adjustment, and the objective table and the slide block are in isolated contact through a gas film. The objective table can rotate in a plane parallel to the surface of the sliding block, the sliding block comprises a shell, a thrust bearing is arranged on the upper portion of the shell, a radial bearing is arranged on the inner side of the thrust bearing, the objective table is in clearance fit with the upper surface and the lower surface of the thrust bearing to form a cavity, and the objective table is in clearance fit with the inner side of the radial bearing to form a cavity. The thrust bearing is provided with an air path for releasing high-pressure air to the cavity, and the objective table is connected with a motor. According to the invention, the contact friction is reduced, the lifting precision and the rotating precision are improved, and the wafer detection alignment efficiency is improved.

The embodiment of the utility model provides a storage tank bottom structure, a storage tank and a carrier rocket, the storage tank bottom structure comprises a shell and a top cover, the shell is of a hollow arc-shaped revolving body structure which is through in the front-back direction, the two ends of the shell are the small-diameter end and the large-diameter end respectively in the axis direction of the shell, and the small-diameter end of the shell is fixedly connected with the top cover; a propellant is arranged on the top cover; a plurality of protruding structures are evenly distributed on the outer side face of the shell in the circumferential direction in the axis direction of the shell. According to the technical scheme, the bottom structure of the thrust bearing type storage tank is simple in process, easy to manufacture in batches and beneficial to achieving light weight of a carrier rocket.

The invention discloses a self-balancing tilting-pad thrust bearing, and relates to the field of sliding bearing design. In order to solve the problems that when an existing thrust bearing is applied to the working condition that a mechanical rotor rotates at a high speed, the axis of the rotor is likely to deflect due to machining quality, self vibration and the like, then a bearing bush of the thrust bearing is stressed unevenly, unbalance loading is generated, and the service life of the thrust bearing is shortened. A double-layer balance block structure is adopted to automatically adjust the stress state of the thrust pads, so that each thrust pad is in uniform contact with the thrust disc, uniform stress among the thrust pads is realized, and the dynamic stability of a mechanical rotating system is improved; the thrust bearing structure can automatically adjust the problem of unbalanced stress between tilting pads of a sliding thrust bearing caused by manufacturing errors, assembly errors and stress states, the reliability and maintainability of the thrust bearing are improved, and the service life of the thrust bearing is prolonged. The invention is suitable for the technical field of thrust bearings.

A method, system and electronic device for regulating the top cover pressure of a vertical hydro-generator set, and a storage medium. The method comprises: setting a monitoring time window, and collecting thrust bearing pad temperatures at different time points within the monitoring time window; acquiring a top cover pressure influence factor set at each time point; inputting the top cover pressure influence factor set corresponding to each time point into a pre-built top cover pressure influence correction database for optimal matching to obtain a bearing pad temperature correction factor corresponding to each time point; using the bearing pad temperature correction factor corresponding to the same time point to perform temperature influence correction on the corresponding thrust bearing pad temperature so as to obtain a corrected thrust bearing pad temperature; and on the basis of a preset pad temperature threshold, performing over-temperature calculation on the corrected thrust bearing pad temperature at each time point.

A turbocharger capable of improving local oil supply and negative pressure oil leakage capacity relates to the technical field of turbochargers and comprises a thrust bearing plate arranged between a shaft seal and a thrust sleeve. Thrust oil wedges are arranged on the opposite side walls of the thrust bearing plate, an oil supply channel is formed in the thrust bearing plate and comprises a first oil collection cavity and a second oil collection cavity which are sequentially and annularly arranged from outside to inside, and first oil collection cavity oil outlet holes communicated with the first oil collection cavity are formed in the opposite side walls of the thrust bearing plate correspondingly. And the second oil collecting cavity oil outlet hole is communicated with the second oil collecting cavity. The thrust bearing solves the problem that in the prior art, oil supply is relatively thin in the area with high bearing capacity on the thrust surface of the thrust bearing; and in order to avoid the reliability problem of dynamic and static interference, a gap between a dynamic piece and a static piece forming a labyrinth structure needs to be designed to be large enough, so that the negative pressure resistance oil leakage of the labyrinth structure is limited.

The invention relates to the technical field of retainer machining, and discloses a retainer machining tool for a thrust bearing and a machining process thereof.The retainer machining tool for the thrust bearing comprises a tool body, the tool body comprises a base and an outer tire clamping cover, a first chip groove is formed in the position, corresponding to a centering claw, of a dustproof cover, and a second chip groove is formed in the position, corresponding to the centering claw, of the dustproof cover; the supporting seat comprises a cushion block installed on the base, and a second chip groove corresponding to the centering claw in position is formed in the cushion block. A plurality of first air blowing openings are formed in the first chip groove, and a plurality of second air blowing openings are formed in the position, corresponding to the second chip groove, of the dustproof cover. Scraps in the first chip removal groove and the second chip removal groove are cleaned through the first air blowing opening and the second air blowing opening; and moreover, by controlling opening and closing of the swing blades and adjusting the airflow in real time according to the machining state, the chip removal requirements of different machining stages can be accurately met, the pertinence of cleaning work is remarkably enhanced, and the energy utilization efficiency is greatly improved.

The utility model relates to a dynamic and static pressure mixed thrust bearing structure which comprises a back plate, the back plate is of a hollow cylinder structure, a plurality of fan-shaped bosses are evenly distributed on the front face of the back plate at intervals in the circumferential direction, a gasket and a bottom foil are arranged between every two adjacent fan-shaped bosses, fan-shaped flat foils are arranged on the gaskets and the bottom foils, and pressure equalizing grooves are formed in the fan-shaped bosses. The pressure equalizing groove is an arc-shaped groove, air outlet holes are formed in the pressure equalizing groove, the air outlet holes are connected with air inlet holes through air supply flow channels, the air supply flow channels are located in the back plate, and the air inlet holes are located in the outer wall of the back plate. The dynamic and static pressure hybrid bearing provided by the utility model is of a multi-tile structure, and the flexible foils and the steps with the air inlet holes are distributed in a staggered manner. The working back pressure of the bearing can be improved through external high-pressure air supply of the air inlet holes, the dynamic pressure effect is improved, abrasion of the bearing during starting and stopping is avoided, and therefore the bearing capacity and rigidity of the bearing are improved.

A turbofan engine includes a fan and a fan actuation system. The fan has a plurality of fan blades. Each of the plurality of fan blades is rotatable about a pitch axis. The fan actuation system includes one or more actuators for rotating the plurality of fan blades about the pitch axis and one or more thrust bearings. The fan actuation system is characterized by a fan actuation system envelope in a range of 300 to 1860. The fan actuation system envelope is given byNFB×DFT×Mcruise(RTBNFB),where NFB is a number of the plurality of fan blades, DFT is a fan tip diameter of the plurality of fan blades, Mcruise is a Mach number of the turbofan engine at cruise operating conditions, and RTB is a thrust bearing radius of the one or more thrust bearings.

The invention belongs to a robot, and particularly relates to a high-strength bearing two-axis robot. According to the high-strength bearing two-axis robot, the bearing capacity of key nodes is enhanced through optimization design, and the overall structural strength and the anti-fatigue performance are improved. The high-strength bearing two-axis robot comprises a mounting frame and the like. A vertical moving mechanism is vertically mounted in the mounting frame, a rotary moving mechanism is arranged on a moving part of the vertical moving mechanism, and a clamping mechanism is mounted on the rotary moving mechanism. The extension arm is tensioned on the arc-shaped track through the clamping shaft, so that the stress of a rotating point of the swing arm is more balanced, the rotating point of the swing arm is prevented from being damaged, the service life of the swing arm is prolonged, the thrust bearing is connected between the swing arm and the lifting plate, and the thrust bearing is used for reducing the friction force of the swing arm during rotation and reducing the resistance of the swing arm during rotation; the service life of equipment is prolonged; the two-way telescopic rod is used for tensioning the end of the swing arm, and the weight borne by the end of the swing arm can be shared.

The utility model discloses an air floatation motorized spindle with a damping cavity on a rotating shaft flange, which comprises a rotating shaft shell, a thrust bearing is arranged at one end of the rotating shaft shell, a plurality of throttling air taps are arranged on the thrust bearing, a closed air cavity is arranged on the rotating shaft shell, an air inlet is arranged on one side of the closed air cavity facing the thrust bearing, and a damping cavity is arranged on the other side of the closed air cavity. A sealing jackscrew is arranged above the closed air cavity, the pressure of the closed air cavity is maximum at the corresponding moment through the throttling air nozzle and the air inlet, air in the closed air cavity is slightly compressed, the air in the closed air cavity is exhausted to generate oscillation when the closed air cavity is staggered, and air hammer excitation generated between the damping thrust bearing and the flange is disturbed by air oscillation. The effects of reducing spindle vibration and improving high-frequency harmonic waves are achieved.

Example thrust bearing apparatus includes: a thrust disk extending radially from the shaft, the thrust disk having a first side and a second side opposite the first side; a bearing housing surrounding the thrust disk and the shaft, the bearing housing having a first wall facing the first side of the thrust disk and a second wall facing the second side of the thrust disk; a first thrust pad coupled to the first wall of the bearing housing, the first thrust pad including a first plurality of serrations circumferentially arranged in a first pattern along the first thrust pad; and a second thrust pad coupled to the first side of the thrust disk, the second thrust pad including a second plurality of serrations circumferentially arranged in a second pattern along the second thrust pad.

[Problem] To provide an axle driving device with a locking differential gear assembly, wherein the pressing force from the clutch pack does not act on the bearings of a differential case when the differential function is restricted.[Solution] The clutch pack includes a clutch housing, a first friction plate, a second friction plate, and a reaction plate, the clutch housing is engaged with the differential case relatively non-rotatably and axially movably, the friction plates are engaged with an axle and the clutch housing, respectively, relatively non-rotatably and axially movably and in a superposed manner, the reaction plate adjacent to the friction plates can freely press them, and the clutch housing is disposed opposite to the reaction plate to face a wall, and a first thrust bearing is disposed therebetween.

The present application discloses a maglev air compressor, which includes a compressor housing, a motor stator, a rotor, a first impeller assembly and a second impeller assembly subjectable to an axial magnetic force and a control module. The compressor housing, the motor stator and the rotor are sleeved sequentially, both ends of the rotor are rotatably connected to an inside of the compressor housing through a maglev bearing group, the first impeller assembly and the second impeller assembly are fixedly oppositely installed on the both ends of the rotor. The maglev bearing group includes: a first thrust bearing piece generating a first axial magnetic force to the first impeller assembly, and, a second thrust bearing piece generating a second axial magnetic force to the second impeller assembly.

A turbocharger with a bleed air brake function relates to the technical field of internal combustion engine supercharging devices and comprises a turbine, the turbine comprises a volute, and a turbine is rotatably arranged in the volute; a first flow channel and a second flow channel which are used for introducing waste gas are arranged on the volute, the first flow channel is communicated with a turbine flow channel, the second flow channel is communicated with a turbine back disc through a perforated heat insulation cover, and a flow channel switching mechanism which is used for connecting and disconnecting the first flow channel or the second flow channel is arranged on the volute. The problems that in the prior art, after an exhaust brake valve is closed, axial force borne by a thrust bearing is instantly and greatly improved compared with axial force in a normal working state, so that the bearing capacity of the thrust bearing is insufficient, and abrasion of the thrust bearing is accelerated are solved; and the exhaust pressure of the engine cannot be released, so that air leaks from a gap between a sealing ring at the turbine end and a sealing ring groove.

The utility model provides a thrust bearing of a steel rolling mill. The thrust bearing comprises a middle shaft ring, a roller assembly, a first seat ring, a second seat ring and a middle space ring, the center shaft ring is composed of an inner ring part and an outer ring part. The outer ring part is arranged in the middle of the outer circumferential surface of the inner ring part; a middle space ring is arranged on the outer side of the outer ring part; the two end faces of the middle space ring make contact with the first seat ring and the second seat ring respectively. The number of the roller assemblies is two. The first roller assembly is arranged between the outer ring part and the first seat ring; and the second roller assembly is arranged between the outer ring part and the second seat ring. According to the thrust bearing of the steel rolling mill, a traditional loose rib structure is abandoned, the thrust bearing is of an integrated structure, machining and installation are convenient, the middle shaft ring is in interference fit with the shaft, the situation that the loose rib sinks to rub the shaft is avoided, the use condition is greatly improved, and the service life of the bearing is prolonged.

The thrust bearing comprises an outer shell, a main oil chamber is arranged at the bottom of the outer shell, and an oil suction opening is formed in the upper portion of the main oil chamber; the thrust main shaft is rotationally installed in the outer shell, a thrust disc extending outwards in the radial direction is arranged on the thrust main shaft, and when the thrust disc rotates, lubricating oil in the main oil chamber can be guided to the outer wall of the circumference of the thrust disc through the oil suction opening and rotates along with the thrust disc; a first mounting cavity for mounting a radial bearing bush assembly is formed between the outer diameter of the thrust main shaft and the outer shell; a self-lubricating system and a forced lubricating system are combined, reliable lubrication of a thrust bearing bush and a radial bearing bush under different working conditions is achieved, the self-lubricating system utilizes rotation of a thrust disc to guide oil liquid to flow, a passive oil supply path driven by a structure is constructed, the self-lubricating system is suitable for power failure or low load scenes, and the service life of the thrust bearing bush and the radial bearing bush is prolonged. And on the basis of forced lubrication, a self-lubricating system is combined to further improve the lubricating effect.

The invention relates to a VOCs purification device based on an enrichment catalysis coupling microwave integrated technology, the VOCs purification device comprises an air inlet, a flip slide bar device and an overall shell, the lower part of the flip slide bar device is connected with the overall shell, and the upper part of the flip slide bar device is connected with the air inlet; a supporting frame is arranged at the bottom end in the overall shell, a stepping motor is arranged in a square groove position in the bottom of the supporting frame, and a three-rotation gear disc oil seal mechanism is arranged in a circular groove position in the top of the supporting frame. A thrust bearing is further arranged in the overall shell, and a rotating wheel cavity is formed above the thrust bearing. The upper part of the runner cavity is connected with a clean gas pipeline; the lower part of the base is connected with a three-spin gear disc oil seal mechanism; a microwave resonance shell is fixedly connected to the side face of the overall shell, and a microwave emission box is arranged on the microwave resonance shell. And a paint mist filter is arranged above the clean gas pipeline in the overall shell. Compared with the prior art, the device has the advantages that industrial waste gas can be directly absorbed, and purification of VOCs is completed under automatic control.

The utility model discloses an air compressor, fuel cell system and vehicle, said air compressor includes, machine body, pressurization mechanism and sealing mechanism, sealing mechanism includes first sealing subassembly and second sealing subassembly both installed on the rotating shaft, first sealing subassembly is connected with first impeller close to the one side of second impeller, and second sealing subassembly is connected with second impeller close to the one side of second impeller. A first sealing channel communicating with the first volute is arranged between the first sealing assembly and the first impeller. The second sealing assembly is connected with the side, close to the first impeller, of the second impeller, and a second sealing channel communicating with the second volute is arranged between the second sealing assembly and the first impeller. The second sealing assembly is provided with a bypass sealing channel communicating with the second sealing channel and an adjusting assembly used for adjusting the opening degree of a communicating opening between the bypass sealing channel and the second sealing channel. The opening degree of the communicating opening is adjusted through the adjusting assembly, axial force balance of the air compressor within the full rotating speed range is achieved, and the safety performance and efficiency of the thrust bearing are improved.

The invention provides a permanent magnet radial-axial collaborative balancing device and method for a shield pump, and belongs to the technical field of shield pumps. The device comprises a pump shell, an impeller, a rotor assembly, a stator assembly, a shaft, a thrust bearing, a rotor permanent magnet component and a static permanent magnet component, the rotor permanent magnet component and the static permanent magnet component correspond to each other, the rotor permanent magnet component is embedded below an impeller front cover plate opening ring, and the static permanent magnet component is embedded into the corresponding inner wall of the pump shell. The magnetization direction and the axis of the pump shaft form a preset inclination angle and are in mirror symmetry, so that a repulsive magnetic circuit with opposite same-name magnetic poles is formed; space magnetic force generated during working can be decomposed into radial and axial components. The radial component provides restoring force pointing to the center when the rotor deviates, and the radial stability is enhanced. The axial component counteracts the axial thrust of the fluid, and the thrust bearing load is reduced. External energy input is not needed, the structure is compact, vibration noise can be effectively restrained, and the service life of the bearing is prolonged.

The utility model discloses a gearbox axial force loading test device, which comprises a test shaft, an upper mounting structure, a lower mounting structure and an axial force applying mechanism, the upper mounting structure comprises a bearing seat, an upper radial bearing, a thrust bearing and a lower radial bearing, and the test shaft is rotatably connected with the bearing seat through the upper radial bearing, the thrust bearing and the lower radial bearing. Labyrinth oil seals are arranged at the upper part and the lower part of the bearing seat; the axial force applying mechanism comprises an oil cylinder, and a piston rod of the oil cylinder is connected with the bearing seat. According to the utility model, the test shaft is a large-span shaft, the actual connection condition of the gear box rotating shaft in actual work is fully simulated, so that the test is closer to the actual operation condition of the gear box rotating shaft, the actual performance parameters under the actual working condition are further obtained, and the reliability of the parameters is ensured; the two radial bearings are used for radially positioning and supporting the test shaft, the concentricity of the test shaft and the rotating shaft is ensured, the thrust bearing is used for bearing the axial load, and the service life of the device is ensured.

The invention relates to a vibration control design method for a ship low-speed motor direct propulsion long shafting, and the method comprises the steps: determining the position of a low-speed motor output flange and the central position of a propeller, determining the positions of a thrust bearing, an intermediate bearing, a tail pipe bearing and the like, arranging the span of the bearings, arranging the number of the bearings, and calculating the shafting strength. Torsional vibration calculation of the long shaft system of the low-speed motor, torsional vibration calculation result analysis, centering calculation of the long shaft system of the low-speed motor, cyclotron vibration calculation of the long shaft system of the low-speed motor, longitudinal vibration calculation of the long shaft system of the low-speed motor, fatigue analysis of a thrust bearing, verification of whether the thrust bearing meets the load requirement or not, shaft system jacking verification, and the like. And finally verifying the shafting vibration control design effect through a navigation test. Different from conventional diesel engine propulsion and high-speed motor propulsion shafting design, the method starts from the characteristics of a low-speed motor direct propulsion shafting, and analysis is carried out through shafting strength design, torsional vibration, centering, rotation, longitudinal vibration, installation and other systems, so that the risks of shafting load imbalance and abnormal vibration are avoided.