817 results about "Axial load" patented technology

The invention relates to the technical field of material fatigue performance testing, in particular to a fatigue acceleration detection method and system for a high-fatigue-resistance cast wheel, and the method comprises the steps: generating a dynamic load spectrum containing a multi-axis combined load according to the actual operation condition of a target cast wheel; applying a dynamic load spectrum to the target casting wheel to perform an acceleration test, and monitoring dynamic strain responses on the surface and inside of the target casting wheel in real time based on the distributed sensing array; establishing a damage accumulation calculation model by taking a loading parameter of the dynamic load spectrum as an additional correlation condition, and calculating an equivalent fatigue damage accumulation value based on the dynamic strain response; when the equivalent fatigue damage accumulated value reaches a preset damage threshold value, it is judged that the target cast wheel reaches the fatigue life end point, and the damage evolution rule in the acceleration test is kept consistent with the damage mechanism of the actual operation working condition. According to the invention, the problems of multi-axis load simulation distortion, incomplete damage monitoring, low service life prediction precision and the like in traditional fatigue detection are effectively solved.

A deflectable tube (312) has a deflectable tip section (301) and a bendable body section (309). The deflectable tube has one or more steering wires (16(i)) spiraling in the body section (309) in order to compensate path length differences occurring in the body section (309) when the body section (309) bends. To isolate axial loads in the body section (309) the deflectable tube (312) is provided with one or more longitudinal force isolation elements (322(k)) in the body section (309), which are running in parallel to the one or more steering wires (16(i)). The force isolation elements (322(k)) are attached at both ends to an outer tube (340) or inner tube (330) or to both.

The invention discloses an alloy functional material fatigue performance prediction model building method, and relates to the technical field of material scientificity, the method comprises the following steps: installing a sensor group on an alloy surface, using an instrument to collect alloy performance influence data, and transmitting the data to a data processor through a wireless network for preprocessing, data storage and analysis; the method comprises the following steps: constructing a load performance prediction model, calculating a thermal coupling fatigue damage coefficient and a multi-axial load fatigue damage coefficient, summarizing and calculating to obtain a composite fatigue damage coefficient, and carrying out preliminary evaluation on the composite fatigue damage coefficient and a safety fatigue damage threshold value. The environment corrosion influence coefficient is calculated by combining the corrosion influence data set and the precipitation object integral number, corrosion degree prediction risk assessment is carried out on the environment corrosion influence coefficient and the safety fatigue damage threshold value, finally, the comprehensive fatigue damage coefficient is obtained, comprehensive corrosion degree assessment and fatigue damage prediction are carried out, real-time early warning and optimization suggestions are provided, and the safety fatigue damage risk is improved. The safe use of the alloy material is ensured; the service life is prolonged.

The invention relates to a pre-compensation flexible assembling and adjusting mechanism of a large-diameter transmission reflector. The pre-compensation flexible assembling and adjusting mechanism comprises the large-diameter transmission reflector, a glue joint mandrel, an isolation telecentric flexible hinge, an isolation plate, a hooke flexible hinge, an adjusting flexible branch chain, an anti-rotation flexible branch chain, a back plate and a driving assembly. The large-aperture transmission reflector is provided with three blind holes for glue joint, and is connected with the isolation plate through three groups of glue joint mandrels and isolation telecentric flexible hinges, so that isolation of load deformation interference of the isolation plate is realized; the driving ends of the two adjusting flexible branch chains are correspondingly connected with two driving assemblies installed on the back plate, and the connecting ends of the adjusting flexible branch chains are connected with the isolation plate. One ends of the Hooke flexible hinges and the anti-rotation flexible branch chains are connected with the isolation plate, and the other ends are connected with the back plate; the device has the advantages of being simple in structural form, stable in movement and high in precision, meanwhile, the return clearance caused by axial load reversing under heavy loads can be avoided, the additional surface shape caused by assembling and adjusting stress is effectively isolated, and the additional surface shape caused by gravity is compensated.

The invention belongs to the technical field of electric digital data processing and foundation engineering, and discloses a method for calculating stress and displacement of a foundation pile in a soil body under the action of a pile top axial load, which comprises the following steps of: taking the pile top as an origin of coordinates, and taking the downward direction of the longitudinal axis of a pile body as a z axis; according to the basic mechanical equilibrium condition of an infinitesimal body formed by the micro-section length randomly selected in the axial direction of the pile body, the boundary condition of the force at the top end of the pile and the deformation coordination relation between the bottom end of the pile and the foundation, characteristic variables reflecting the pile body stress and displacement distribution mode are solved; and according to the basic mechanical equilibrium condition of the infinitesimal body, the boundary condition of the force at the top end of the pile and the characteristic variables, the pile body axial displacement, the pile body axial force and the pile side surface friction resistance at different depths in the axial direction of the pile body are solved. The rapid and effective method and scientific basis are provided for design calculation and analysis of the foundation pile in the soil body under the action of the axial load of the pile top, and the method has important technical method significance and engineering application value.

The invention discloses a stretch-bending composite fatigue test device and method for an engine blade (centrifugal impeller) simulation sample in a high-temperature corrosion environment. The device comprises an axial load system, a transverse vibration system, a temperature control system and a measurement system. The axial load system applies an axial pull-pull load to the simulation sample through a pin, the transverse vibration system provides a transverse bending vibration load for the simulation sample, the temperature control system provides the temperature of an engine in a real working environment for an examination part of the simulation sample, and meanwhile, according to the tension-bending composite fatigue test requirement, the test accuracy is improved. A simulation sample is designed according to a local position load of an engine blade (centrifugal impeller), a salt mist spraying / deposition mode is adopted on the surface of the sample to simulate a sea salt mist corrosion environment, the real stress, temperature and corrosion environment of an engine are accurately reflected, and the test can more accurately simulate the stretch-bending composite fatigue condition of a dangerous part in the working process.

The invention discloses a multi-shaft fretting wear testing device for a hub bearing, which comprises an equipment rack, a hydraulic oil source system assembly, a temperature simulation environment box, a tool structure component and an auxiliary hoisting mechanism, and is characterized in that the temperature simulation environment box is mounted on the equipment rack, the tool structure component is used for mounting the hub bearing to be tested, and the auxiliary hoisting mechanism is mounted on the equipment rack; the tool structure component is installed in the temperature simulation environment box, the auxiliary hoisting mechanism is arranged above the temperature simulation environment box, and a radial load actuator, an axial load actuator and a swing actuator are arranged in the equipment rack. According to the multi-axis fretting wear testing device for the hub bearing, simulation of the environment temperature and application of loads in multiple directions can be effectively achieved, so that testing is achieved by applying swing actions.

The invention discloses an axial-radial integrated loading rotating shaft bush high-temperature swing friction-wear testing machine, and belongs to the technical field of friction-wear testing, the axial-radial integrated loading rotating shaft bush high-temperature swing friction-wear testing machine comprises a bottom plate, a loading module is arranged on the bottom plate, one side of the loading module is connected with a high-temperature clamp module, one side of the high-temperature clamp module is connected with a motion generation module, and the motion generation module is connected with the loading module. One side of the motion generation module is connected with an electric control box body, and one side of the electric control box body is connected with a control computer. According to the axial-radial integrated loading rotating shaft bush high-temperature swing friction wear testing machine disclosed by the invention, synchronous application of an axial load and a radial load is realized through cooperative control of double stepping motors in the loading module; meanwhile, the influence of the coupling on torque measurement is effectively eliminated through the self-designed coupling, and the accuracy of synchronous application is improved.

A ball screw bearing efficiency test device disclosed by the present invention comprises a tool table and a tested screw rod, the tested screw rod is composed of a screw rod shaft and a screw rod sleeve which is used for sleeving the screw rod shaft and is movably matched with the screw rod shaft so as to perform sliding motion along the axis direction of the screw rod shaft, and the tool table is provided with a driving seat, a test seat and a sliding seat. The tested screw rod is located in the test seat, and the drive seat is provided with a first drive member used for driving the screw rod shaft to move and a first detection member used for cooperating with the first drive member to detect the torque generated when the screw rod shaft moves. The tool table is provided with a loading screw rod and a second driving part used for driving the loading screw rod to do relative sliding motion in the axis direction of the tested screw rod. A loading part used for being matched with the second driving part to apply an axial load to the transmission sleeve is arranged between the loading screw rod and the screw rod sleeve. The problem that in the prior art, no detection equipment for detecting the efficiency of the ball screw matched with the MKC2 operating system exists is solved.

The invention provides a data twin-driven automobile precision shaft fault prediction system and method, and relates to the technical field of fault prediction, and the method comprises the steps: building a digital twin model for precision shaft fault prediction based on the working condition operation data of a precision shaft; determining the correlation constraint quantity of each sensor according to the correlation elements of the monitoring data among the sensors in the multi-source sensor network, and determining the state credibility of each sensor through all the correlation constraint quantities and the interference characteristics of the multi-source sensor network; a failure mechanism model of the precision shaft is constructed based on material characteristics and working condition operation data of the precision shaft, state reconstruction is carried out on the failure mechanism model through an axial load and hardness obtained through a precision shaft test, and a digital twinborn model is updated according to reconstructed failure parameters and all state credibility sums. And predicting the fault state of the precision shaft through the updated digital twin model, so that dynamic updating of the digital twin model can be realized, and the precision of fault prediction of the precision shaft is improved.

The invention relates to the technical field of bearing measurement, and discloses a multifunctional measuring instrument for comprehensive precision of a rolling bearing. The driving device is mounted on the working platform and comprises a load block capable of axially moving and a motor assembly for driving the load block to rotate; the measuring device comprises a high-precision inductance measuring head for detecting the runout of the bearing to be measured and a pressure sensor for monitoring an axial load; the fixing device is a replaceable mandrel base and is used for supporting an inner ring or an outer ring of the bearing to be detected; wherein the driving device applies an axial load to an inner ring or an outer ring of a to-be-measured bearing through the load block and drives the to-be-measured bearing to rotate, the measuring device synchronously collects bounce and load data of the to-be-measured bearing, the brushless motor and the load block are connected through the magnetic coupling, and the centering error of the mechanical coupling is eliminated. Meanwhile, motor vibration is prevented from being transmitted to the to-be-tested bearing, the pushing force air floating shaft sleeve actively counteracts the magnetic attraction force, and the stability of the load applied to the to-be-tested bearing is remarkably improved.

The invention relates to a tension-torsion combined load test device for a rotary connector, and relates to the technical field of crossing of mechanical engineering and material testing technologies, and the tension-torsion combined load test device comprises a working box, a shell, an automatic clamping assembly, a workpiece hoisting assembly, an axial load applying assembly and a torque applying assembly, the automatic clamping assembly and the torque applying assembly are arranged on the upper surface of the shell in a penetrating mode. A first forward and reverse motor drives a first gear and drives a second gear and a forward and reverse threaded column to rotate, so that two sets of U-shaped movable plates synchronously move in the same direction or in the opposite directions, after the first forward and reverse motor is started, the rotary motion is converted into rotation of the threaded column through gear transmission, and the U-shaped movable plates linearly move along limiting grooves under the action of threads; the clamp claw is driven to realize automatic clamping or loosening, manual operation is replaced, accurate and uniform clamping force is realized, loosening or deviation caused by human factors is avoided, and the reliability of test data is improved.

The impeller machine capable of stabilizing and reducing the axial force comprises a turbine impeller and a nozzle base, the nozzle base is arranged on the blade back side of the turbine impeller, and a gap is formed between the impeller back of the turbine impeller and the nozzle base; a groove is formed in the nozzle base in the circumferential direction of the nozzle base, and an adjusting piece used for adjusting the geometric space of a fluid domain of a turbine impeller back cavity is arranged in the groove. The adjustable rib-shaped structure is driven by the power structure to move back and forth in the axial direction, so that leakage flow in the wheel back cavity does not perform simple rotary Taylor-Couette flow any more, but performs complex flow behaviors under the action of the protrusions or the grooves in combination with the rotary friction action of the wheel back disc, and the flow speed is increased. Under the condition, the pressure drop rate of the wheel back leakage flow in the radius direction of the wheel disc can be increased or decreased so as to achieve the state of being balanced with axial load adjustment generated by a pressure field of a working medium at the impeller.

A surrounding rock deformation and failure test system with a rotatable stress main shaft in a three-dimensional crustal stress field is characterized in that a press machine upper pressure head and a press machine base are oppositely distributed up and down, and a loading hydraulic cylinder is connected with the press machine upper pressure head; the surrounding rock sample is vertically arranged in the axial loading space, and a simulation roadway is formed in the axis part of the surrounding rock sample; annular upper and lower end plates are fixedly connected in the upper and lower ends of the confining pressure cylinder respectively; the confining pressure cylinder sleeves the outer side of the axial loading space; a plurality of groups of mounting holes are uniformly formed in the circumferential directions of the annular upper and lower end plates; the radial pressurizing assembly comprises a supporting steel pipe and an elastic capsule. The main supporting section is sleeved with the elastic capsule, and a plurality of through holes are formed in the main supporting section. A plurality of strain bricks are pre-buried in the surrounding rock sample; the track is fixedly mounted in the simulated roadway; the micro camera is assembled on the track through the electric control trolley; and the strain gauge II and the acoustic emission probe are arranged in the simulated roadway. According to the system, the working condition that the direction of a stress field changes can be simulated in a three-dimensional true triaxial stress environment.

The batten type water lubricated bearing comprises a shaft sleeve and a plurality of composite battens which are installed on the inner wall of the shaft sleeve at intervals in the circumferential direction of the shaft sleeve, and the composite battens comprise the first battens installed in a bearing area of the bearing and the second battens installed in a non-bearing area of the bearing. A through type variable cross-section groove is formed in the side, away from the ship stern shaft, of the first batten in the length direction of the first batten, and the cross-section area of the variable cross-section groove is gradually increased from the bow to the stern. The invention further discloses an assembly method of the batten type water lubricated bearing. The first batten is arranged in the bearing carrying area and provided with the variable cross-section groove, so that the rigidity of the first batten is gradually reduced in the direction from the bow to the stern, axial gradient rigidity distribution is formed, the low-rigidity area at the stern end can adapt to deformation of the stern shaft to be adjusted in a self-adaptive mode, local stress concentration is reduced, and the stability of the stern end is improved. And a high-rigidity area at the bow end maintains necessary bearing strength, so that the axial load of the bearing is homogenized as a whole.

The invention discloses a multipoint non-uniform measurement device for uniaxial compression radial displacement of salt rock at high temperature and an implementation method. The measurement device comprises an axial load loading system, a test cavity temperature control system, a radial displacement measurement system and a computer data processing system, the test cavity temperature control system is used for regulating and controlling the environment temperature of the salt rock sample placed in the test cavity temperature control system, so that the salt rock sample is located in a high-temperature environment with a preset temperature; the axial load loading system is in contact with the salt rock sample in the test cavity temperature control system and is used for applying a vertically downward axial load to the salt rock sample at a high temperature; and the radial displacement measurement system is connected with the salt rock sample and is used for measuring the real-time temperature and radial displacement of the surface of the salt rock sample placed in the test cavity temperature control system. And the computer data processing system is connected with the radial displacement measuring system. According to the invention, the radial displacement and temperature of the salt rock sample in the uniaxial compression process can be measured with high precision under the high-temperature condition.

The invention discloses a true triaxial dynamic and static combined loading and multi-field coupling test device and method. The test device comprises a test cavity; the loading system comprises an axial loading device, a Hopkinson pressure bar, a longitudinal loading device and a vertical loading device; the axial loading device is configured to apply an axial load to the test coal sample; the Hopkinson pressure bar is configured to apply an impact load to the test coal sample; the longitudinal loading device is configured to apply a longitudinal load to the test coal sample; the vertical loading device is configured to apply a vertical load to the test coal sample; the gas supply system comprises a gas bottle and is configured to inject gas into the test cavity; the fiber bragg grating monitoring system comprises a fiber bragg grating sensor and a fiber bragg grating demodulator, and the fiber bragg grating demodulator is configured to be used for sensing a change signal of a strain field of the test coal sample under the loading action of the loading system; and the ultrasonic phased array monitoring system comprises an ultrasonic transducer and is used for sensing an ultrasonic signal of the test coal sample under the loading action of the loading system.

The invention discloses a variable-shaft-diameter rolling bearing testing device and testing method, and aims to solve the problems that an existing rolling bearing testing device is difficult to adapt to bearings with different shaft diameter specifications, and a main shaft needs to be replaced frequently. The device is composed of a testing platform, a lead screw driving mechanism, an axial loading mechanism, an inner diameter variable mechanism, an outer diameter variable mechanism, a main shaft, a bearing seat mechanism, a main shaft coupler, a main shaft motor and a supporting frame. The inner diameter variable mechanism adapts to the inner diameters of different rolling bearings through a plurality of ring petals and a chuck structure, the outer diameter variable mechanism can adjust the outer diameter and the radial applied force in real time according to the outer diameter of the rolling bearing, the axial loading mechanism can apply a preset axial load to the bearing, and besides conventional constant axial force, the axial loading mechanism can also apply axial torque in different directions. The device can adapt to the testing of rolling bearings with various shaft diameter specifications without replacing the whole set of main shaft, effectively shortens the testing preparation time, and improves the testing efficiency. And the universality and the applicability are high.

The invention relates to a pressure freezing triaxial test device and method for a rock-soil medium, and belongs to the technical field of rock-soil pressure freezing experiments. The device comprises a pressure bearing mechanism, a triaxial loading control mechanism, a confining pressure loading mechanism, a freezing mechanism and a stress and deformation monitoring mechanism, and can realize accurate control of confining pressure, axial load, pore water pressure and temperature of a sample; through the CT imaging unit, the change of the rock and soil medium in freezing and triaxial loading processes can be monitored in real time. The method comprises the steps of sample placement, CT imaging, confining pressure control, pore water pressure adjustment, axial load application and stress deformation monitoring so as to analyze the mechanical property of the rock and soil medium. According to the invention, the change condition of the rock-soil medium in freezing and triaxial loading processes can be obtained in real time, and a test means is provided for the research of the mechanical properties of underground frozen rock-soil.

The utility model provides a single-stator double-rotation axial magnetic flux motor, which comprises a stator assembly and a rotor assembly, the stator assembly comprises an inner side shell, an outer side shell and a stator mounting frame arranged between the inner side shell and the outer side shell, the inner side wall of the inner side shell is provided with a bearing chamber, and the inner periphery of the bearing chamber protrudes to form an annular boss; a first angular contact bearing is arranged on one side of the annular boss, a second angular contact bearing is arranged on the other side of the annular boss, and the first angular contact bearing and the second angular contact bearing are arranged oppositely; the rotor assembly comprises a rotating shaft, a first rotor disc and a second rotor disc, the rotating shaft penetrates through the first angular contact bearing and the second angular contact bearing, and the first rotor disc and the second rotor disc are connected with the two opposite ends of the rotating shaft respectively. The bearing chamber is arranged in the inner side shell, the space in the center of the stator assembly is fully utilized, the axial size of the motor is reduced, the two angular contact bearings are arranged oppositely, axial loads caused by rotation of rotors at the two ends of the rotating shaft can be effectively balanced and dispersed, and the service life of the motor is prolonged.

The invention relates to the technical field of bearing tests, in particular to a loading device and a loading method for a low-temperature bearing test of a spaceflight turbine pump. Comprising a test shaft shell, a test bearing A, an axial loading gland, an axial loading piston cylinder shell, an axial loading piston, a variable-diameter piston cylinder shell, a variable-diameter piston cylinder piston, a vaporizer, a test bearing B, a liquid nitrogen pipeline, a nitrogen pipeline and a hydraulic oil pipeline. Liquid nitrogen enters a test shaft shell from a liquid nitrogen pipeline to be fully cooled and then is discharged, the liquid nitrogen is converted into nitrogen through heat exchange of a vaporizer, the nitrogen is introduced into a variable-diameter piston cylinder shell through a nitrogen pipeline to push a variable-diameter piston cylinder piston to compress hydraulic oil, and the hydraulic oil is introduced into an axial loading piston cylinder shell to generate oil pressure to push an axial loading piston to move. The axial loading piston generates thrust on the axial loading gland to promote the axial loading gland to complete thrust loading on the test bearing, the electric cylinder is adopted to directly apply push-pull force load to the variable-diameter piston rod, load fluctuation is compensated, and stability of the test load is guaranteed.

The invention provides an axial force active balancing method for a fluid machine. The axial force active balancing method for the fluid machine comprises the steps that S1, fluid axial force borne by an impeller of the fluid machine during working is obtained; s2, configuring a motor for driving the impeller, and enabling the motor to generate an electromagnetic axial force through design or control; and S3, the direction of the electromagnetic axial force is opposite to that of the fluid axial force, the magnitude of the electromagnetic axial force is controlled to at least partially counteract the fluid axial force, and therefore the net axial load transmitted to the supporting bearing is reduced. The driving motor is actively designed and controlled to generate electromagnetic axial force which is equal to the pneumatic / hydraulic axial force of the impeller in magnitude and opposite to the pneumatic / hydraulic axial force of the impeller in direction, so that zero returning or minimization of net axial force is realized at the bearing.

The invention discloses a ball screw pair loading test device, and relates to the technical field of ball screw testing. The driving piece is used for driving the tested lead screw to rotate and adopts an integrated headstock structure integrated at one end of the bed body; and the loading piece is used for providing an axial load for the tested lead screw, adopts a dual-motor top-to-top loading structure arranged at the other end of the bed body, and is matched with the integrated headstock structure to form a unified mechanical standard. According to the invention, an integrated headstock structure of the driving piece and a dual-motor opposite-top loading structure of the loading piece are matched to form a unified mechanical standard, a friction torque measurement state and an axial force measurement state are rapidly switched through a switchable connection structure, a to-be-tested lead screw only needs to be clamped once, multi-parameter test can be completed, the test efficiency is effectively improved, and the test cost is reduced. And meanwhile, positioning errors caused by multiple times of clamping are avoided, it is ensured that all parameters are based on the same reference, and data relevance is higher.

The invention discloses a porous medium static pressure air floatation spline which comprises a spline shaft, a spline sleeve outer sleeve, an air bearing, a spline sleeve, a flange sleeve, a valve plate and a porous medium. The air floating spline is cylindrical, a plurality of air paths and static pressure cavities are formed in the air floating spline, porous media are mounted in trapezoidal grooves of the spline housing, and the internal static pressure cavities enable circumferential torsional moment applied to the spline shaft to be borne by the porous media and static pressure supports between trapezoidal tooth slopes on the spline shaft when the spline works; radial force applied to the spline shaft is borne by a static pressure support between the porous medium and the inclined plane of the trapezoidal teeth and a static pressure support on the inner ring of the air bearing; the axial load applied to the outer sleeve of the spline housing is borne by the annular static pressure cavity and the annular static pressure cavity; according to the porous medium static pressure air floatation spline, abrasion of the spline in the working process is reduced, and the problem that the spline precision is affected due to abrasion after a traditional ball spline works for a period of time is solved.

The invention relates to a wind power tower bending shear torsion test loading anti-interference decoupling switching integrated device, which comprises a reaction wall, a support, a reaction column, a reaction longitudinal beam, a reaction cross beam and four actuators, and is characterized in that the top end of a fixed tower on the support is connected with a loading beam through a switching device; the first actuator applies axial load to the tower drum through the loading beam and the switching device, the second actuator and the third actuator apply bending moment to the end of the tower drum through the loading beam and the switching device, the fourth actuator is matched with the connecting piece, the rectangular steel plate is connected with the switching device to apply horizontal shearing force and torque to the end of the tower drum, and application and decoupling of various types of loads are achieved. The test precision is ensured; the device can truly simulate the load condition of the tower drum section, can also be matched with the loading beam to transmit the axial force, the bending moment, the shearing force and the torque to the wind power tower drum, and effectively solves the influence of horizontal displacement and torsional deformation on loading in the horizontal and vertical load coupling loading process in the wind power tower drum composite load simulation test.

The spindle sliding bearing comprises a radial pad, a thrust pad and a bearing main body, the middle of the bearing main body is columnar, and the two sides of the bearing main body are conical tables; the radial pads are uniformly arranged in the middle of the through hole in the bearing main body in the circumferential direction, and the thrust pads are uniformly arranged on the conical tables at the two ends of the bearing main body in the circumferential direction. Compared with the prior art, the segmented sliding bearing is adopted, the conical surface radial pads and the inclined plane thrust pads are distributed in an array mode in the axial direction to form a multi-pad structure, and the pad replacement efficiency can be improved. The thrust pad installed in an inclined mode can bear radial loads and axial loads at the same time, and the overall bearing capacity of the bearing is enhanced while axial impact is borne.

The invention discloses a composite bearing load calculation method considering ferrule deformation. The composite bearing load calculation method comprises the following steps: step 1, enabling m rolling body rows to be equivalent to springs capable of bearing axial load, radial load and torque; constructing a non-rigid shaft system stress schematic diagram of the composite bearing; step 2, calculating the acting load on each inner ring according to the deformation of the mandrel; 3, calculating the Hertz contact deformation of the rigid ferrule under the loading condition; 4, calculating the contact deformation generated by the deformation of the ferrule; 5, solving the total radial deformation of the raceway contact considering the deformation of the ferrule; 6, calculating the load of the rolling body at the position by using the total deformation of the rolling body and the inner and outer ferrules; and 7, verifying the resultant force of each row of rolling bodies and the reliability of the external load borne by the bearing. According to the method, the acting load of each row of rolling bodies of the composite bearing is calculated, and load analysis is performed on the composite bearing under the condition of considering the deformation of the ferrule, so that a more accurate calculation result is obtained and applied to bearing design.

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 discloses an anti-unbalance loading testing machine for aero-engine main shaft bearing test, which comprises a machine body, a core shaft and two test seats arranged in the machine body, the two test seats are coaxially and oppositely arranged, and test holes for the core shaft to penetrate through are formed in the two test seats in a penetrating manner; a test cavity for mounting an external to-be-tested bearing is formed between the inner peripheral wall of the test hole and the outer peripheral wall of the mandrel, and one of the test seats is provided with an axial loading structure for applying an axial load to the other test seat; a guide structure is arranged between the two test seats, the guide structure is used for being in linkage fit with the axial loading structure to correctly conduct the axial load so as to prevent unbalance loading, and the two test seats are both provided with radial loading structures used for applying radial loads to the corresponding test seats. The problem that a traditional aero-engine main shaft bearing test device is prone to unbalance loading when the bearing is subjected to axial loading and radial loading is solved.

The invention discloses an elevator bearing multifunctional test tool, which comprises a frame body, a mandrel, a tool seat, a support plate and a drive plate, a through hole penetrates through the tool seat, and a to-be-tested bearing is connected between the mandrel and the through hole. The driving plate is provided with a driving structure which is used for driving the mandrel to operate to enable the to-be-tested bearing to operate synchronously so as to simulate the actual operation condition of the elevator bearing, and the frame body is provided with a first simulation structure which is used for applying a static or dynamic radial load to the inner ring of the to-be-tested bearing so as to simulate the actual static or dynamic radial load condition of the bearing. The frame body is also provided with a second simulation structure used for applying a static radial load to the outer ring of the to-be-tested bearing and a third simulation structure used for applying a static axial load or a reciprocating axial load to the inner ring of the to-be-tested bearing so as to simulate the working condition that the bearing is actually subjected to the static axial load or the reciprocating axial load. The problems that a traditional elevator bearing test tool is single in detection function and different load working conditions borne by an elevator bearing in actual operation are difficult to simulate are solved.