1025 results about "Frictional coefficient" patented technology

The invention relates to a negative-wear super-wear-resistant current-carrying friction pair material which is a conductive lubricating film which is constructed in situ and stably exists under a current-carrying friction condition, and the current-carrying friction pair material is composed of Ga-based liquid metal, a Mo coating and an Al alloy bolt. Through cooperation of friction pair materials, a friction interface reaction is adjusted to generate a conductive lubricating film, and excellent lubricating and wear-resisting properties are achieved; in a large voltage and current range, the average friction coefficient is always maintained to be 0.25 or below, the existence of the lubricating film enables the surface to present negative wear, and the average negative wear rate is 1.28 * 10 <-6 > mm < 3 > / Nm or above. The obtained material is suitable for application in the field of electric contact industry and provides lubrication and wear protection for the surfaces of mechanical parts.

The invention relates to the technical field of parameter simulation, in particular to a parameterized simulation model design method based on a standard part structure. The method comprises the following steps: collecting bolt connection data of standard components in the wind generating set; blade surface vibration feature information is extracted according to the standard component bolt connection data; acquiring stress concentration distribution data at the joint based on the blade surface vibration characteristic information; calculating a local deformation accumulated value of the standard part according to the stress concentration distribution data at the joint; measuring the friction coefficient variation trend of the contact surface based on the local deformation accumulated value of the standard component; deducing pre-tightening force attenuation characteristics according to the change trend of the friction coefficient of the contact surface; and constructing a standard part fatigue damage prediction model based on the pre-tightening force attenuation characteristics. According to the method, the vibration characteristics of the blade surface are collected, the stress concentration distribution at the bolt connection position is indirectly extracted, and the bottleneck that the internal connection state is difficult to directly sense is broken through.

Systems and methods for clamping force estimation are provided. In one example, operations include generating a displacement-torque curve based on displacement data and motor torque data of an electric motor of the EMB system for a braking episode having a switchover time. The operations also include determining a high torque value and a low torque value at the switchover time from the displacement-torque curve. The operations further include calculating a friction coefficient based on the high torque value and the low torque value. The operations yet further include determining a non-linear coefficient from the displacement-torque curve. The operations include estimating a clamping force for a constant speed based on the friction coefficient and the non-linear coefficient.

The invention relates to the technical field of powder machines, in particular to an intelligent control method and system for a powder forming machine. The method comprises the steps that powder material parameters and mold parameters are obtained, the powder material parameters comprise particle size distribution, yield strength and a friction coefficient, and the mold parameters comprise mold geometric parameters; based on a discrete element method, particle dynamic analysis is conducted on the powder material parameters, particle mechanical motion characteristic data are generated, and the particle mechanical motion characteristic data comprise particle position data, speed data, contact force data and force chain distribution data constructed by the contact force data; based on a finite element method, structural mechanics analysis is conducted on the mold parameters, mold macromechanics response data are generated, and the mold macromechanics response data comprise stress distribution data, strain distribution data and displacement distribution data; and according to the particle mechanical motion characteristic data and the mold macromechanical response data, generating a powder pressing path control instruction of the mold.

The support comprises an upper seat plate, a spherical crown lining plate, a middle steel lining plate and a lower seat plate, the upper seat plate is fixedly installed at the bottom of a beam bottom, the spherical crown lining plate is arranged between the upper seat plate and the middle steel lining plate, the middle steel lining plate is arranged between the spherical crown lining plate and the lower seat plate, and the spherical crown lining plate is fixedly installed on the lower seat plate. The lower seat plate is fixedly mounted at the top of a bridge pier, the bottom surface of the upper seat plate is fixedly connected with a first limiting ring through a first anti-shear pin, the first limiting ring abuts against the middle steel lining plate, the top surface of the lower seat plate is fixedly connected with a second limiting ring through a second anti-shear pin, and the second limiting ring abuts against the middle steel lining plate. In a normal use state, the slip surface adopts a large curvature radius and a small friction coefficient to provide smaller damping, reduce the acting force of the support on a bridge and reduce the lifting of a beam end, and in an earthquake state, the slip surface adopts a small curvature radius and a large friction coefficient to provide larger damping, so that the shock absorption and isolation effect of the support is improved; and displacement of the bridge under the earthquake condition is controlled.

The invention relates to the technical field of engineering construction, and particularly discloses a pavement flatness measuring device for engineering construction, which comprises an eight-wheel instrument for measuring the flatness of a pavement; the detection mechanism is installed in the eight-wheel instrument support, and the detection mechanism detects the friction coefficient of the road surface before the device runs; the road surface friction coefficient is detected in advance through the adjusting mechanism, the adjusting mechanism dynamically adjusts the position of a pressure sensor and the ground clearance of a detection wheel according to the friction coefficient, and a fixed motor is started to drive a rotating ring to rotate through a rotating roller and a synchronous belt to drive a second lead screw to rotate; the movement of the second moving member can drive the eight-wheel instrument supporting seat to move up and down, thereby adjusting the ground clearance of the detection wheel, effectively compensating the data deviation caused by the wear of the detection wheel, and improving the accuracy and stability of the measurement result.

The invention discloses a forking operation track generation method and device for a forklift, and the method comprises the steps: determining the pose of a target tray when the distance between the forklift and the target tray reaches a first distance; according to the target tray pose, the current fork tooth pose and the forking environment illumination intensity, the first pose deviation between the target tray and fork teeth is determined, and a first forklift linear speed and angular speed instruction is obtained through calculation; in the process that the forklift travels to the second distance, the ground friction coefficient and the vibration compensation amount are determined according to the friction-vibration joint estimation model and the first forklift linear speed and the first forklift angular speed; when the second distance is reached, determining a second pose deviation between the target tray and the prongs; and simulating the obtained parameters to obtain a second linear velocity and angular velocity instruction so as to complete the forking operation. Through rough adjustment and fine adjustment of the two distances, high-precision track planning of the forklift is achieved, and through calculation of the ground friction coefficient and the vibration compensation amount, the curve insertion precision of the tray is further improved.

The invention provides a wafer polishing method, a polishing device and processing equipment, the wafer polishing method is used for removing a target layer comprising a first layer and a second layer with similar friction coefficients, a primary polishing process comprises a first polishing stage and a second polishing stage, and the method comprises the following steps: determining first time; determining the material removal amount and the material removal rate of the wafer in the second polishing stage; calculating second time; adjusting the first time according to the second time to obtain third time; and polishing the current wafer, executing a first polishing stage according to a third time, and executing a second polishing stage according to a second time, so that the second layer reaches the target thickness. According to the polishing method, the chemical mechanical polishing efficiency and polishing precision of the specific wafer can be improved.

The invention discloses a method for evaluating the performance of a friction pendulum type seismic mitigation and isolation support in a service state. The method comprises the following steps: S1, carrying out horizontal sliding displacement and vertical force detection on the friction pendulum type seismic mitigation and isolation support in service; s2, according to the detected data, the sliding interface friction coefficient mu of the service friction pendulum type seismic mitigation and isolation support is calculated; s3, according to the obtained sliding interface friction coefficient mu of the in-service friction pendulum type seismic mitigation and isolation support, anti-seismic performance indexes of the friction pendulum type seismic mitigation and isolation support are calculated, and the anti-seismic performance indexes comprise the horizontal rigidity and the effective damping ratio coefficient; and S4, according to the influence of the sliding interface state change and the horizontal rigidity change on the seismic damage state of the bridge structure, the anti-seismic safety risk of the friction pendulum type seismic mitigation and isolation support in the sliding interface state is graded. By means of the method, the sliding interface state and the specific friction characteristic of the friction pendulum type seismic mitigation and isolation support in the service state can be obtained, and therefore the anti-seismic performance of the friction pendulum type seismic mitigation and isolation support can be evaluated.

The invention discloses a self-adaptive parallel clamp and method suitable for a bush-disc test, and belongs to the technical field of mechanical engineering, the self-adaptive parallel clamp comprises a supporting mechanism, a parallelism adjusting mechanism is arranged in the supporting mechanism, the lower end of the supporting mechanism is connected with a clamping rod, the lower end of the clamping rod is provided with a sample clamping mechanism, and the sample clamping mechanism is provided with a clamping mechanism. And a movement mechanism is arranged at the lower end of the sample clamping mechanism. By adopting the self-adaptive parallel clamp suitable for the lining-disc test, the problem of parallelism error between the lining and the disc is solved, so that the horizontal load error and the friction force and friction coefficient measurement error caused by the error are reduced, and a more accurate surface-surface friction wear disc test is realized.

The invention discloses a method, device and equipment for inhibiting abnormal torsional vibration of a propulsion shafting and a storage medium, and relates to the technical field of ship propulsion systems.The method comprises the steps that the torsional vibration inherent frequency and the torsional vibration modal shape corresponding to the abnormal torsional vibration frequency of the propulsion shafting are matched; calculating the modal mass and the modal damping ratio of the abnormal torsional vibration of the matching order, and calculating the bearing reaction at the rear stern bearing and the front stern bearing; fitting friction coefficients among the rear stern bearing, the front stern bearing and the propulsion shafting; according to the reaction force, the friction coefficient and the matched torsional vibration modal shape, calculating a friction excitation torque under the torsional vibration modal shape of the corresponding order and a Taylor expansion coefficient corresponding to the friction excitation torque; and according to the matched inherent frequency of the torsional vibration, the modal mass, the modal damping ratio and the Taylor expansion coefficient, a suppression device used for generating electrical damping is arranged on the propulsion shafting so as to suppress the abnormal torsional vibration. According to the application, the abnormal torsional vibration can be accurately suppressed by accurately designing the structural parameters of the suppression device.

The invention discloses a water turbine guide vane shaft-top cover rub-impact coupling system vibration characteristic analysis method which comprises the following steps: S1, establishing a reduction dynamic model of a guide vane shaft-top cover rub-impact coupling system by adopting a finite element method in combination with a fixed interface modal synthesis method; s2, analyzing an influence rule of a modal truncation number, a friction coefficient and a water flow surface load on first three orders of prestress modal characteristics of the guide vane shaft-top cover rub-impact coupling system based on a reduction kinetic model; s3, analyzing an influence rule of a near load end contact state, a near-far load end contact state and a friction coefficient on vibration response and spectral characteristics of the guide vane shaft-top cover rub-impact coupling system when the reduction kinetic model is subjected to harmonic excitation; and S4, evaluating whether the mixed-flow water turbine operates stably and safely based on the steps. By analyzing the vibration characteristics of the guide vane shaft-top cover rub-impact coupling system of the mixed-flow water turbine, the structural health state and fault of the mixed-flow water turbine are monitored and diagnosed.

The utility model relates to a tensioning device for a building block type screw. The tensioning device comprises a stretching piece, a pressing piece, a telescopic piece and a driving piece. The stretching piece is used for being connected with a locking piece of the building block type screw. The pressing piece is used for being connected with a thread element of the building block type screw. One end of the telescopic piece is connected with the stretching piece, and the other end of the telescopic piece is connected with the pressing piece; the driving part is connected with the telescopic part and used for driving the telescopic part to do telescopic motion. Compared with the prior art, the tensioning piece and the pressing piece only transmit axial force to the shaft core and the thread element, so that the transmission efficiency of the tensioning force is high, and compared with a radial screwing mode of a traditional torque wrench, radial load is not borne between the shaft core and the thread element, and the torque wrench is simple in structure and convenient to use. The problem that the friction coefficient is increased due to torsional deformation of the thread element and the shaft core spline is solved.

The invention provides a big data-based building construction safety assessment method, which comprises the following steps of: acquiring a tension distribution gradient, a local stress peak value, a tension fluctuation frequency and a pulley contact surface friction coefficient of a tower crane steel wire rope under a dynamic working condition, and determining a dynamic stress distribution characteristic of the steel wire rope; performing real-time data screening and peak value identification processing on the dynamic stress distribution characteristics to obtain a stress concentration coefficient distribution diagram of each measuring point, and determining a tension concentration area with the stress concentration coefficient higher than a preset threshold value; carrying out weighted adjustment on the non-uniform wear characteristics, calculating to obtain the surface wear depth, the wear particle size and the weight change of the contact surface temperature rise under different working conditions, and obtaining the real-time wear index weight distribution; and aiming at the real-time wear index weight distribution, combining the tension distribution gradient and the wear region area in the historical operation data, and analyzing and predicting the change trend of the surface roughness of the steel wire rope through wear trend fitting and load history to obtain a residual life prediction value.

The invention discloses a constant-tension self-compensation coating method and an intelligent deviation adjusting method, and belongs to the technical field of material dynamic characteristic on-line testing and cooperative control, and the constant-tension self-compensation coating method comprises the following steps: obtaining stress distribution data of the surface of a coating base material, generating a multi-mode optical data set, analyzing a real-time tension estimated value and material dynamic characteristic parameters, and obtaining a multi-mode optical data set; wherein the dynamic characteristic parameters of the material comprise an equivalent elastic modulus and a surface friction coefficient; generating a dynamic coupling coefficient based on the real-time tension estimation value and the dynamic characteristic parameters of the material, performing analysis and calculation, and outputting a tension compensation control quantity and a deviation adjustment control quantity; and the tension compensation control quantity is executed to adjust the unwinding or winding torque, and meanwhile, the deviation adjusting control quantity is executed to adjust the angle of a deviation correcting guide roller. According to the method, the dynamic characteristics of the material are analyzed in real time by adopting multi-mode optical perception, and the tension deviation coupling model is constructed, so that interference advanced cooperative inhibition and working condition self-adaptive stable coating can be realized.

The utility model relates to a friction type quasi seismic isolation support, a bridge and a building body, comprising a spherical support used for forming a first plane friction pair with a building body cross beam, and further comprising an additional plane support used for being fixed on a building bottom pier and used for being supported between the spherical support and the building bottom pier; a second plane friction pair is formed between the additional plane support and the spherical support, and the friction coefficient of the second plane friction pair is larger than that of the first plane friction pair; the structure further comprises a plurality of fragile shear keys, the upper ends of the fragile shear keys are connected to the spherical support, and the fragile shear keys abut against the two opposite sides of the additional plane support in the midspan direction of the building cross beam in a limited mode. According to the utility model, the upper structure of the building body can be prevented from being easily lifted when the building body suffers from a rare earthquake, the building body is prevented from losing the shock resistance after the rare earthquake, and the controllability of the friction coefficient is stronger.

The invention discloses a gear pair life prediction method based on dynamic stress, belongs to the technical field of reliability design of mechanical transmission systems, and aims to solve the problem of inaccurate life prediction caused by neglecting a dynamic effect and a real surface topography in an existing gear design method. The method comprises the following steps: firstly, acquiring gear pair interface mechanical property parameters considering shafting vibration, dynamic load and surface roughness, wherein the parameters comprise transient oil film pressure, friction coefficient, oil film thickness and shear stress; solving a three-dimensional subsurface stress field by adopting an algorithm and calculating von Mises equivalent stress distribution; stress volume integration is conducted on different rough surfaces, the honed surface is used as the reference, the relative fatigue life of other surfaces is calculated based on the Zaretsky life prediction theory, and accurate prediction and process optimization of the contact fatigue life are achieved; meanwhile, the dynamic bending stress of the tooth root is calculated based on the dynamic normal load, and the bending fatigue safety coefficient is checked.

The invention belongs to the field of analog simulation, and particularly relates to a runway dynamic friction coefficient real-time simulation method, system and equipment based on multi-source data. The problem that taxiing simulation is insufficient in authenticity is solved. The method comprises the following steps: acquiring runway surface temperature data, accumulated water depth and / or accumulated snow depth; judging a runway type based on the runway texture features, matching a basic friction coefficient according to the runway type, and dynamically correcting the basic friction coefficient in combination with the accumulated water depth and / or accumulated snow depth and runway surface temperature data to obtain a corrected friction coefficient; acquiring a tire vertical load, an initial sideslip angle and tire pressure data of the aircraft, calculating a tire lateral force, and calculating a final friction coefficient in combination with the updated sideslip angle, the corrected friction coefficient and the sideslip attenuation coefficient; and inputting the data into a ground taxiing model of the flight simulator to realize real-time simulation. Through the attenuation effect of the dynamic process on the friction coefficient, the simulation result better fits the real runway state.

The invention discloses a propulsion shafting abnormal torsional vibration diagnosis method, device and equipment and a storage medium, and relates to the technical field of ship propulsion systems.The method comprises the steps that torsional vibration inherent frequencies and torsional vibration modal shapes of a propulsion shafting under multiple target orders are obtained; the modal mass and the modal damping ratio of the propulsion shaft system under each target order are calculated, and the bearing reaction at the rear stern bearing and the front stern bearing is calculated; fitting friction coefficients among the rear stern bearing, the front stern bearing and the propulsion shafting; according to the reaction force, the friction coefficient and the torsional vibration modal shape under the target order, calculating a friction excitation torque under the torsional vibration modal shape of the corresponding order and a Taylor expansion coefficient corresponding to the friction excitation torque; and judging according to the inherent frequency of the torsional vibration, the modal quality, the modal damping ratio and the Taylor expansion coefficient under the target order, and checking whether the torsional vibration mode of the target order of the propulsion shafting has abnormal vibration or not. Whether friction torsion abnormal vibration is generated or not can be predicted according to the shafting design parameters.

The invention discloses a face gear dynamics analysis method considering hybrid thermal elastohydrodynamic lubrication and microtexture coupling, which comprises the following steps: step 1, based on a gear dynamics theory, constructing an eight-degree-of-freedom face gear-rotor system dynamics model; 2, establishing a finite element analysis model of the micro-texture face gear transmission pair, solving time-varying meshing stiffness and coupling the time-varying meshing stiffness to a system kinetic equation; 3, coupling a micro-texture item representing the film thickness equation with the film thickness equation of mixed thermal elastohydrodynamic lubrication; 4, coupling the mixing and thermal influence with the elastohydrodynamic lubrication basic equation, and establishing a mixed thermal elastohydrodynamic lubrication model; 5, carrying out iterative solution on the mixed thermal elastohydrodynamic lubrication and micro-texture coupling equation, outputting the tooth surface friction force and the friction coefficient of a solution domain, and inputting the tooth surface friction force and the friction coefficient as parameters into a system kinetic equation; and 6, solving the coupled system kinetic equation by using a Runge-Kutta numerical integration method to obtain the kinetic response of the face gear transmission system.

The invention relates to the technical field of welding monitoring, and discloses an online monitoring method for the welding quality of a joint of an ultrasonic welding metal sheet, which comprises the following steps: S1, detecting the friction coefficient of a welding interface of the metal sheet in real time through a friction coefficient detection unit; s3, dividing the real-time friction coefficient detected in the step S1 into three stages, namely a pre-welding stage, a welding process stage and a post-welding cooling stage according to the welding process, and S4, performing statistical analysis on the real-time friction coefficient of each stage in the step S3 by adopting an average value and an extreme value, and during calculation, at least obtaining the real-time friction coefficient of each stage during five times of welding. The method has the following advantages and effects that by dynamically monitoring the friction coefficient of the interface of the ultrasonic welding metal sheet in real time, detecting the quality of a welding joint in real time and optimizing welding process parameters in time, the percent of pass of products can be greatly increased, and the operability and accuracy of quality control are remarkably improved.

The conductive slip ring with the self-lubricating structure comprises a slip ring body, the outer side of the slip ring body is coated with a self-lubricating coating, the two sides of the slip ring body are connected with the inner sides of correspondingly arranged positioning bearings through first insulating sleeves, and meanwhile the outer sides of the two positioning bearings are connected with the two sides of the interior of a protective shell. The interior of the slip ring body is connected with a main shaft through a second insulating sleeve, one end of the main shaft penetrates through one side of the slip ring body and extends to the outer side of one end of the protective shell, and an electric brush mechanism is arranged in the middle of the upper end of the protective shell and comprises a sealing seat, a positioning block, a supporting adjusting assembly and an electric brush assembly. A self-lubricating assembly is arranged in the middle of the lower end of the protective shell. According to the conductive slip ring with the self-lubricating structure, the self-lubricating coating is arranged, so that in the relative movement process of the electric brush head and the slip ring body, a solid lubricant is continuously released, a layer of ultra-thin lubricating film is formed between the electric brush head and the slip ring body, the friction coefficient is effectively reduced, abrasion is reduced, and the service life of the conductive slip ring is prolonged.

A plurality of collapsible protrusions extending from a base including a first end, a second end, a first surface, and an outer surface. The second end is opposite the first end. The first surface is distal from the base. The outer surface is between the first end and the second end. The outer surface has a variable coefficient of friction. The variable coefficient of friction increases in a direction towards the base. The second end has a coefficient of friction greater than the coefficient of friction at the first end.

The invention discloses a friction coefficient difference-considered wear prediction method, which comprises the following steps of: firstly, obtaining a stable friction coefficient and an evolution law through friction wear tests with different loads and frequencies; secondly, establishing a universal friction coefficient model which comprises a stable friction coefficient model and an evolution model of the friction coefficient along with the cycle number; thirdly, based on an energy method and in combination with the friction coefficient model, an energy wear model considering the friction coefficient difference is established; then, through a UMESHMOTION user subprogram and a loop jump technology, dynamic prediction of the wear depth is achieved in finite element simulation; and finally, verifying the accuracy of model prediction through a test. The dynamic change of the friction coefficient along with the load, the frequency and the cycle index can be accurately reflected, the application range of the energy wear model is expanded, the wear prediction precision under the complex working condition is remarkably improved, and the method has important theoretical significance and engineering application value.

The invention relates to the technical field of gear mechanical calculation, in particular to a spur gear and rolling bearing transmission system analysis method, device and equipment and a medium. The method comprises the steps that spur gear design and working condition parameters are obtained, and the meshing process is analyzed to obtain initial meshing rigidity; constructing a transmission dynamics model, and introducing initial rigidity to solve an initial dynamics response; analyzing a meshing process under bearing deformation based on the response, and obtaining a corrected meshing position; the gear tooth stress and tooth surface lubricating state is analyzed based on the position, and the corrected meshing rigidity and the tooth surface friction coefficient are obtained; introducing parameters and solving to obtain a corrected dynamic response; judging whether an iteration stop condition is met or not, and if not, replacing the initial response with the corrected response to repeat the analysis; according to the method, the meshing position, the rigidity and the friction coefficient are dynamically corrected through an iteration mechanism, the coupling effect of bearing deformation and tooth surface friction is considered, and the analysis precision of a straight gear-rolling bearing transmission system is effectively improved.

The invention provides a gear gluing analysis method and device, and relates to the technical field of data processing, and the method comprises the steps: simulating a gear transient meshing process based on a gear pair model, and obtaining mechanical parameters of gear meshing; based on the mechanical parameters, a gearbox temperature field and corresponding thermodynamic parameters are determined, and the thermodynamic parameters comprise lubricant viscosity and tooth surface deformation data; determining the minimum film thickness and the corresponding friction coefficient according to the mechanical parameters and the thermodynamic parameters; updating the three-dimensional gear pair model according to the tooth surface deformation data, and re-executing the transient meshing process of the simulated gear and subsequent steps based on the friction coefficient until convergence is achieved; and evaluating the gear gluing risk according to the tooth surface maximum contact stress, the tooth surface maximum temperature and the minimum film thickness during convergence. Therefore, through coupling analysis of mechanics, thermodynamics and lubrication, coupling analysis of multiple physical quantities is achieved, and the accuracy of gear gluing risk assessment is improved.

The invention discloses a method for testing the mechanical strength of a hydrated natural fracture of deep shale, which comprises the following steps: selecting a target block rock sample, and carrying out fracture forming treatment to obtain a rock sample fracture wall surface; soaking the wall surface of the rock sample crack for required hydration time; measuring the elastic coefficient k of the silica gel gasket; the rock sample and the silica gel gasket are combined and then placed in a thermoplastic pipe, and shale natural crack mechanical strength testing is carried out; testing and collecting test data under different closing stresses; stress analysis is conducted on the rock sample in the shear slip process according to test data, a linear relation between F2-F1 and the effective closing stress is obtained through fitting, and the slope and the intercept in the linear relation are the friction coefficient mu and the cohesion C of the wall face of the natural fracture of the deep shale respectively. According to the method, the defects in the prior art are overcome, the testing method considering the mechanical strength change rule of the natural fracture of the deep shale reservoir under the hydration effect is explored, and accurate characterization of reservoir parameters of the deep shale oil and gas reservoir is achieved.

The present invention provides an adaptive radial-thrust integrated bearing suitable for high-speed and heavy-load conditions, comprising a bearing body, a thrust fixed pad and a radial tilting pad, wherein the bearing body comprises a radial part and a thrust part; the thrust fixed pad is fixedly installed at one end of the thrust part along the circumferential direction, and the radial tilting pad is arranged inside the radial part along the circumferential direction; a cavity structure is arranged on one side of the thrust fixed pad for forming a friction pair, for forming an oil film, and the radial tilting pad comprises a load-bearing radial tilting pad and an unload-bearing radial tilting pad, and micro-textures are distributed on the load-bearing radial tilting pad. The radial part pad of the present invention is provided with micro-textures at the load-bearing part, which can effectively reduce the contact area between the friction pairs, thereby reducing contact deformation and local pressure concentration, and further reducing the friction coefficient; the thrust part pad is provided with a cavity structure, which can greatly reduce the lubricating oil temperature between the friction pairs, ensure the fluid viscosity, and greatly improve the axial load-bearing capacity and anti-eccentric load performance of the bearing.

According to the novel bridge support sliding plate provided by the utility model, the plastic oil is used as a lubricating medium; the friction coefficient is reduced, the wear resistance is improved, and vibration and noise are reduced; a lubricating film is automatically formed in the operation process, the lubricating film ensures continuous lubrication in a severe environment and adapts to the stability performance of a wide temperature range, the structural stress of the bridge support under stress is effectively reduced, vibration and noise between moving parts are reduced, the stability and durability of operation of the bridge support sliding plate are remarkably improved, and the service life of the bridge support sliding plate is prolonged. Bridge faults caused by poor lubrication are reduced; a good lubrication state is kept for a long time, friction loss is reduced, and the maintenance-free effect is achieved. And the solid plastic oil is not easy to leak, so that the risk of environmental pollution is reduced.

The invention discloses a variable-pitch sliding table, and relates to the technical field of sliding tables, the variable-pitch sliding table comprises a base used for providing supporting force and a rotating rod connected with the base, and further comprises a pitch adjusting mechanism arranged on the base and used for changing a gap and a connecting mechanism used for moving a workpiece, and an extrusion block is arranged in the extrusion groove. In the using process of the variable-pitch sliding table, an existing screw rod with a fixed screw pitch is changed into the screw rod with the variable screw pitch, so that when the device is started and braked, the screw pitches are changed into different gaps, starting is facilitated during starting, the effect of assisting in speed reduction at the tail end can be achieved, and in the using process, the screw rod with the variable screw pitch can be replaced by the screw rod with the variable screw pitch. The variable screw pitch strip can be continuously oiled, so that the friction coefficient between the variable screw pitch strip and the guide ball is maintained in a relatively proper range, and the situation that the service life of the sliding table is shortened due to additional abrasion of the guide ball caused by the overlarge friction coefficient is avoided.