47 results about "Sliding wear" patented technology

The invention relates to a sliding wear performance evaluation method of a sliding bearing, a sliding wear testing machine and application. The method comprises the following steps: acquiring initial-state benchmark characterization of a sliding bearing sample, placing the sliding bearing sample at a test station of the sliding wear testing machine, outputting lubricating oil, collecting a process oil sample, and acquiring final-state characterization of the sliding bearing sample after the test is completed; on the basis of initial state benchmark characterization, process oil sample analysis data, final state characterization and working condition parameters applied by a sliding wear testing machine, the wear stage and the wear mechanism are analyzed, and the sliding wear performance of the sliding bearing is evaluated; a sliding shaft supporting module, a rotating power module, an oil supply lubricating module and a radial load pressurizing module are arranged on the testing machine matching platform; the method is applied to wear resistance evaluation of sliding bearings prepared by adopting different processes. According to the invention, the core working condition of the actual dynamic pressure bearing is accurately reproduced, the stability and durability of the test system are improved, and the occurrence, development and evolution process of wear is visualized and quantifiable.

This application relates to the field of water conservancy engineering and discloses a lifting gate for water conservancy projects, including a base, a frame, a gate body, and a drive mechanism. It also includes a connecting pipe, one end of which passes through the middle of the gate body, and the other end is fixedly connected to a sleeve. A piston cylinder is sealed inside the sleeve. A telescopic rod is mounted on the top of the gate body via a mounting bracket. A connecting plate is fixedly mounted on the telescopic end of the telescopic rod. The top of the balance pipe is fixedly connected to the connecting plate. This device uses a baffle plate to block water entering the semi-circular area, thereby reducing the difference in water level on both sides of the gate body. This design can reduce or offset the water pressure on both sides of the gate body, significantly reducing sliding wear and frictional resistance between the gate body and the chute during relative movement. It also reduces the power consumption of the drive mechanism, making it highly practical.

Provided are: a liquid crystalline resin composition having good flowability, which provides a molded body having good and excellent balance between low dust generation, low sliding wear, low warpage, and mechanical strength; and a camera module using the liquid crystalline resin composition. This liquid crystalline resin composition contains (A) a liquid crystalline resin, (B) a plate-like filler, and (C) an olefin polymer, the component (B) having a median diameter of 8-50 [mu] m, the component (C) containing an epoxy group-containing olefin polymer, the content of the component (A) being 54-87% by mass, the content of the component (B) being 10-40% by mass, and the content of the component (C) being 2.75-6.00% by mass with respect to the entire liquid crystalline resin composition, the content of the epoxy group is at least 0.003 mass% and less than 0.048 mass%.

The invention discloses a wear-vibration coupling modeling method and device for a roller linear guide rail pair system, and the method comprises the steps: dividing the movement process of a roller into an LC stage and two transition stages according to the contact load, deformation state and wear mechanism difference of the roller in a sliding block track; respectively establishing a sliding wear model and an impact-sliding composite wear model, and constructing a non-uniform wear depth expression taking space coordinates as input; the multi-state contact behavior is described by introducing roller compression deformation and contact angle change, and the actual contact area under different contact states is determined based on the Hertz contact theory; in combination with roller operational analysis and a coordinate transformation relation, mapping of the abrasion depth among a roller coordinate system, a sliding block coordinate system and a guide rail coordinate system is achieved, and the abrasion effect of each roller is accumulated through a time discretization method; a five-degree-of-freedom nonlinear dynamic model is introduced, coupling analysis of pretightening force degradation and vibration response is achieved, and dynamic performance changes of the guide rail system in long-term operation are predicted.

The utility model discloses a knitting machine spindle guide track supporting device which comprises a knitting machine installation bottom plate, at least four spindle guide rails are evenly installed on the upper portion of the knitting machine installation bottom plate through bolts, and cycloid mechanism installation grooves are formed in the portions, among the spindle guide rails, of the knitting machine installation bottom plate. A first track groove is formed in the upper portion of the outer side of the spindle guide rail, a first baffle is arranged at the top of the first track groove, and a first transverse pulley track is defined by the first track groove and the first baffle. In order to further slide the knitting spindle, a second track groove is formed in the inner side of the spindle guide rail, and the second track groove and a transverse pulley on the inner side of the knitting spindle are installed in a sliding mode. The supporting force of the knitting spindle is dispersed in the sliding process, the movement load of the knitting spindle is increased, and sliding abrasion between the knitting spindle and the spindle guide rail is reduced.

The application discloses a kind of gradient nanostructure sliding wear high-efficiency calculation method, comprising: obtaining gradient nanostructure grain size parameter and load parameter, determine the material parameter at different depths;Establish size-dependent crystal plasticity constitutive model and dislocation density evolution model and cluster homogenization model;Establish three-dimensional friction contact finite element model, calibrate constitutive model parameters and friction and wear parameters;In three-dimensional friction contact finite element model, calculate the results such as contact pressure, relative slip, cumulative plastic strain, dislocation density;Based on energy dissipation theory, calculate the wear depth increment of each contact node.The application can be coupled in the same calculation framework gradient grain size, crystal plastic deformation, dislocation density evolution, friction contact and surface wear evolution, obtain the wear depth, contact pressure, cumulative plastic strain, dislocation density of gradient nanostructure under reciprocating sliding load, and can be used for comparing the wear resistance under different surface grain size.

This invention relates to the field of tire rubber performance testing technology, and more particularly to a method and system for evaluating and predicting the sliding wear of tread rubber under high-torque acceleration / braking conditions in new energy vehicles. The invention measures the wear amount W at a slip ratio s=10 under the same load, speed, temperature, and abrasive conditions on an improved Lambourn slip wear testing machine. 10 W 15 W 20 The slip sensitivity coefficient K was obtained by linear fitting the W-s relationship using the least squares method. slip and intercept b. Based on high slip wear and K slip Constructing evaluation index I for high torque operating conditions HT And by calibrating the model, I HT This is mapped to wear level or equivalent wear mileage. Compared with single slip rate evaluation, this invention can characterize the sensitivity of wear as slip rate increases, enhance the ability to distinguish high slip events, improve the consistency between indoor evaluation and actual vehicle wear, and is applicable to formula screening, process window determination, and mileage prediction.

The utility model relates to the technical field of automobile connecting rods, and discloses a wear-resistant aluminum alloy automobile connecting rod which comprises a connecting rod body, the upper side of the connecting rod body is fixedly connected with a connecting rod large head, the lower side of the connecting rod body is fixedly connected with a connecting rod small head, and the upper side of the connecting rod large head is provided with a connecting rod cover. An anti-abrasion assembly is arranged on the inner side of the large connecting rod head and the inner side of the connecting rod cover, a first through hole is formed in the large connecting rod head, and a second through hole is formed in the small connecting rod head. The anti-abrasion assembly comprises protrusions, and the protrusions are fixedly connected to the inner walls of the connecting rod large head and the connecting rod cover. The protrusions on the inner walls of the connecting rod large head and the connecting rod cover increase friction force with a crankshaft and prevent relative sliding abrasion, the abrasion-resistant coatings are directly resistant to abrasion, the coatings in the shallow grooves can supplement the abraded abrasion-resistant coatings, self-repairing is achieved, the heat dissipation fins of the connecting rod body increase the heat dissipation area, the situation that the performance of the connecting rod is reduced due to high temperature is avoided, and the service life of the connecting rod is prolonged. And stable operation of the engine is ensured.

The invention provides a liquid crystal resin composition having good fluidity and a camera module using the same. The liquid crystal resin composition provides a molded body having excellent balance in terms of low dust generation, low sliding wear, low warpage, and suppression of inward tilt deformation. This liquid crystalline resin composition contains (A) a liquid crystalline resin, (B) a particulate filler, (C) a plate-like filler, and (D) an olefin polymer, the component (B) having a median diameter of 0.3-8 [mu] m, the component (C) having a median diameter of 10-50 [mu] m, the component (D) containing an epoxy group-containing olefin polymer, the content of the component (A) being 52-82 mass% with respect to the entire liquid crystalline resin composition, and the content of the component (B) being 50-70 mass% with respect to the entire liquid crystalline resin composition. The content of the component (B) is 2.5-35% by mass, the content of the component (C) is 5-35% by mass, the total content of the component (B) and the component (C) is 15-45% by mass, the content of the component (D) is 1.50-6.00% by mass, and the content of the epoxy group is 0.003-0.050% by mass.

The invention discloses a method for forecasting the abrasion loss of a six-rack ultra-high strength steel cold rolling working roll. The method comprises the steps that rolling data of six racks are collected; the sliding abrasion loss and the rolling abrasion loss between the working rollers of the racks and the strip steel and between the working rollers of the racks and the middle rollers are calculated; correcting by comprehensively considering the influence of the temperature on the hardness of the roller; and outputting the abrasion loss of each rack. According to the invention, the wear condition of the working roll of each rack can be visually presented, the roll body needing to be replaced can be accurately positioned, the consumption cost is effectively reduced, reliable data support is provided for field staff, the stability and the high efficiency of the cold rolling process are ensured, the product quality problem caused by wear is avoided, the rejection rate is reduced, and the overall production efficiency is improved.

The application discloses a controllable magnetic field and atmosphere multi-mode fretting-sliding wear test device and method, and belongs to the technical field of material friction and wear performance test. The device comprises a magnetic field generating module, a magnetic attraction force closed-loop regulation and control system, a friction and wear test platform and an atmosphere environment control mechanism. The friction and wear test platform comprises a fretting friction and wear module and a sliding friction and wear module. The fretting friction and wear module and the sliding friction and wear module are respectively used for fretting friction and wear test and sliding friction and wear test of the sample to be tested. The atmosphere environment control mechanism is used for controlling the atmosphere environment of the sample to be tested. The application can solve the technical bottleneck that the traditional device cannot dynamically match the magnetic field and mechanical parameters, lacks multi-mode friction and wear test simulation and controllable atmosphere environment, significantly improves the reliability and applicability of test data, and provides technical support for the research on material friction and wear behavior under a complex magnetic field environment.

The utility model discloses a double-feeding plastic pulverizer which comprises a pulverizer body, a cover plate is connected to the pulverizer body in a sliding and penetrating mode, feeding cylinders are symmetrically and fixedly connected to the cover plate in a penetrating mode, auxiliary mechanisms used for removing iron in plastic particles are symmetrically arranged in the pulverizer body, and each auxiliary mechanism comprises a magnet plate, a supporting plate, a connecting column and a material guiding plate. The magnet plate is located at the bottom of the feeding cylinder and used for conducting iron attraction operation on the interiors of the plastic particles, the supporting plate is located on the side portion of the magnet plate, the connecting column is slidably arranged on the side portion of the smashing machine body, and the material guiding plate is located in the feeding cylinder. According to the plastic particle feeding device, the feeding cylinder, the magnet plate, the supporting plate, the connecting column, the connecting plate, the material guiding plate, the sliding plate and the limiting block are matched with one another, the material guiding plate conducts plastic particle discharging and flow dividing on the interior of the feeding cylinder, and then the magnet plate adsorbs iron impurities in plastic particles; and therefore, the iron impurities in the plastic impurities can be removed conveniently.

The invention relates to the technical field of plate erecting machines, in particular to a plate erecting machine for mounting an ALC spliced large plate. According to the technical scheme, the device comprises a rack, a supporting plate, a sliding plate and a clamping mechanism, and the innovative core is that a plate positioning part is additionally arranged. According to the component, the traction rope is synchronously wound and unwound through the driving module, the clamping seats connected to the two ends of the ALC plate are controlled to be synchronously tightened, and therefore the longitudinal position of the plate is forcibly centered and locked in the horizontal state, and it is ensured that the clamping height is consistent every time. The bottom of the clamping seat is provided with a rolling body for self-adaptive centering, and the clamping seat can adapt to different plate thicknesses through the distance adjusting assembly. The device is further provided with an installation distance adjusting mechanism to adapt to different plate lengths and an anti-abrasion displacement mechanism to reduce sliding abrasion of the plates. According to the clamping and positioning device, clamping and positioning precision and automation are achieved, and on the premise that installation nodes are prevented from being blocked, the repeated precision and overall efficiency of ALC plate installation are greatly improved.

The utility model discloses a cervix uteri sampling swab packaging device which comprises a machine frame. The multiple elastic pressing devices are connected with the rack in a sliding and penetrating mode; the lifting device is mounted at the bottom of the rack, and the lifting device is used for driving the elastic pressing device to do lifting motion; the plastic packaging device is connected with the elastic pressing device in a sliding and penetrating mode, and the plastic packaging device is used for heat sealing of the packaging paper; the bearing table is mounted on the rack, and the position of the bearing table corresponds to that of the plastic packaging device; and a guide roller. By means of the arrangement mode that the elastic pressing device and the lifting device are matched, more uniform and stable pressure distribution can be provided in the heat sealing process through elastic supporting of the elastic pressing device, the phenomenon of poor heat sealing caused by too large or too small pressure is avoided, and therefore the firmness and the sealing performance of a seal are remarkably improved, and the sealing quality is improved. The safety of the sampling swab is ensured, and the risk of operators in the heat sealing process is reduced.

The application relates to the technical field of valve sealing, and discloses a self-sealing anti-blocking safety valve, which comprises a valve frame, the upper part and the bottom part of the valve frame are respectively connected with an upper valve port and a lower valve port, further comprises a slide valve piece for controlling the opening and closing of the flow channel of a valve body, and a bidirectional sealing piece for controlling the flow channel sealing of the upper valve port and the lower valve port. The self-sealing anti-blocking safety valve is characterized in that the slide valve piece and the bidirectional sealing piece are combined with each other, solid medium cannot enter the valve cavity during the whole operation process of the valve, the lower sealing pair of the valve is completely hidden and is not impacted by the medium at any position, so that the service life of the valve is greatly prolonged. Meanwhile, the cylindrical rubber sleeve is in contact with the valve port for sealing, the whole valve body can automatically control the random rotation of the rubber sleeve, when the valve is closed, different contact surfaces can be controlled to abut against the position of the valve port, so that the valve is closed, the sliding wear of the valve is reduced, the contact abutment sealing effect is maximally maintained, and the service life of the valve is prolonged.

This invention discloses a multifunctional mechanical testing device for marine pipelines, belonging to the field of mechanical performance testing for marine engineering pipelines. It includes a horizontally arranged main load-bearing frame, two lifting gantry frames spanning above the main load-bearing frame, and modularly detachable and selectively assembled functional components for axial tension / compression, four-point bending, radial extrusion, and external wear testing. The main load-bearing frame adopts a double-layer welded rigid beam-column structure, equipped with sliding guide rails, adjustable flanges, and internal pressurization ends. The lifting gantry frames use a combination structure of triangular supports and pre-embedded box-shaped steel bases, exhibiting excellent overall torsional and overturning resistance. All testing functional components are structurally universal and can be quickly disassembled and replaced. It can simulate single working conditions such as axial tension / compression, four-point bending, radial extrusion, and external wall sliding wear, as well as tension-bending coupled composite load conditions, on the same platform. This invention features high modularity and strong adaptability to pipe diameter and length, improving testing efficiency and reducing equipment purchase and site usage costs.

The invention relates to the technical field of valve sealing, and discloses a self-sealing anti-blocking safety valve which comprises a valve frame, and the upper portion and the bottom of the valve frame are connected with an upper valve port and a lower valve port correspondingly. The slide valve part is used for controlling the opening and closing of a flow channel of the valve body; and the two-way sealing piece is used for controlling flow channel sealing of the upper valve port and the lower valve port. According to the self-sealing anti-blocking safety valve, through mutual combination of the sliding valve piece and the two-way sealing piece, solid media cannot enter the valve cavity in the whole operation process of the valve, a lower sealing pair of the valve is completely hidden at any position and is not impacted by the media, and therefore the service life of the valve is greatly prolonged. Meanwhile, the cylindrical rubber sleeve and the valve port are used for contact sealing, the whole valve body can automatically control random rotation of the rubber sleeve, and therefore when the valve is sealed, different contact faces can be controlled to abut against the positions of the valve port, sealing is achieved, sliding abrasion of the valve is reduced, the contact abutting sealing effect is kept to the maximum degree, and the service life of the valve is prolonged.

The invention relates to a method for screening multiple supporting rollers based on sliding-rolling coupling, belongs to the technical field of performance detection of core parts of wide and thick plate rolling equipment, and solves the problem that the screened supporting rollers are not suitable for application scenes due to the lack of effective evaluation standards of the supporting rollers in the prior art. The screening method comprises the following steps: pretreating a plurality of samples of a plurality of supporting rollers to obtain a first number of sliding test samples and a second number of rolling test samples corresponding to each supporting roller; obtaining sliding wear data of each supporting roller based on a reciprocating sliding friction wear test; based on a ball disc type rolling contact fatigue test, rolling contact fatigue failure data of each supporting roller is obtained; and according to the sliding wear data and the rolling contact fatigue failure data of each type of supporting rollers, screening the multiple types of supporting rollers to obtain the optimal type of supporting rollers. And the scene adaptability of the screened supporting roller is improved.

The utility model discloses a high-pressure-bearing maintenance-free energy dissipation steel support and belongs to the technical field of bridges and building supports. A sliding wear-resisting plate is fixedly connected in a groove of a spherical crown steel lining plate, and the sliding wear-resisting plate and a support top plate form a sliding friction pair used for achieving horizontal sliding. The sliding wear-resisting plate is made of a self-lubricating wear-resisting material; the rotating sliding plate is fixedly connected into the groove of the support bottom plate, and the convex spherical surface of the spherical crown steel lining plate and the rotating sliding plate form a rotating friction pair for realizing rotating fit; the rotating sliding plate is made of one or more of a self-lubricating wear-resistant material, performance polytetrafluoroethylene, modified ultra-high molecular weight polyethylene and a modified polytetrafluoroethylene material; the convex spherical surface of the spherical crown steel lining plate is made of an anti-corrosion wear-resistant material; the guide blocks are arranged in the grooves in the two sides of the support bottom plate, the guide sliding strips are arranged in the cylindrical surface grooves of the guide blocks, the guide sliding strips and the check blocks form a guide sliding width used for guiding the sliding process of the support, and the high pressure bearing performance and the good anti-corrosion effect are achieved.

The utility model discloses a liquid nitrogen tank cooling device. The positioning device comprises a positioning frame, the restraining part comprises a limiting table and is arranged on the positioning frame; the filling component comprises an adjusting rod which is vertically and slidably arranged in the limiting table in a penetrating manner, and the bottom of the adjusting rod extends into the tank body; the conveying pipe vertically penetrates through the adjusting rod and is rotationally connected with the adjusting rod, and a spray head is arranged at the bottom of the conveying pipe; the transmission assembly is arranged in the adjusting rod and connected with the conveying pipe; the adjusting part is arranged on the positioning frame and is connected with the adjusting rod; the pressure relief unit is arranged in the limiting table; according to the liquid nitrogen spraying device, after the limiting table blocks the opening of the tank body, the adjusting component drives the spray head to move to the preset position through the adjusting rod, then liquid nitrogen is conveyed into the spray head through the conveying pipe, and meanwhile the transmission assembly drives the conveying pipe to rotate so that the liquid nitrogen can be rotationally sprayed in the tank body, so that the inner wall of the tank body is cooled in the first time; and then the liquid nitrogen flows downwards and is accumulated, so that the cooling efficiency is improved, and the cryopreservation waiting time is shortened.

A sealed connection device of a controller terminal comprises a controller shell and a wire, an installation bottom plate is fixedly installed at the bottom of the controller shell, a circuit board body is arranged in the controller shell, and binding posts electrically connected with the circuit board body are fixedly installed on the left side and the right side of the controller shell. According to the wiring terminal, after a wire is connected with a wiring column through an electric contact piece, a first rotary handle is rotated, so that clamping arc plates on the two sides of the wiring column get close to each other and are attached to each other, the position of the electric contact piece is stabilized through cooperation with a gasket, sliding abrasion is avoided, and stable connection is guaranteed. The second push rod cooperates with the anti-falling block, so that the wire is slightly bent, and when the wire is accidentally dragged, by means of the wedge-shaped groove, the anti-falling performance is improved, and the influence on connection is reduced. The second rotating handle is rotated to drive the sealing plate to block the sealing sleeve shell, protection is achieved through the sealing soft cushion, the extrusion force of the sealing plate can be increased along with aging of the soft cushion, deformation is compensated, and good sealing of the terminal is guaranteed.

The invention discloses a sliding bearing life evaluation method, system and device and a storage medium, and the method comprises the steps: solving the maximum oil film pressure and maximum shear stress under each working condition based on a fluid lubrication calculation model, carrying out the whole-cycle damage accumulation evaluation through a Miner rule, and calculating the material fatigue life of a sliding bearing; solving an axis track of the sliding bearing in each start-stop working period based on a fluid lubrication calculation model, and calculating the abrasion loss in each period by utilizing an Archard sliding abrasion model according to the axis track; on the basis of accumulation of a fluid lubrication calculation model and the abrasion loss, the bearing capacity and the bearing stability of the bearing during partial abrasion are calculated, and the abrasion life of the sliding bearing is obtained; comparing the wear life of the sliding bearing with the material fatigue life of the sliding bearing, and determining the life of the sliding bearing. The method can accurately predict the service life of the sliding bearing under the frequent start-stop working condition, and provides a scientific basis for maintenance, overhaul and replacement of equipment.

This invention relates to the field of overhead power transmission conductor technology and discloses a high tensile strength and wear-resistant overhead conductor, including an overhead conductor assembly. The outer side of the overhead conductor assembly is provided with a wear-resistant component for axial sliding and adjusting the protection point position. Inside the wear-resistant component is a moving component for driving the wear-resistant component to move along the conductor's axial direction. A photovoltaic panel for providing electrical energy is installed on the outer surface of the overhead conductor assembly. A cleaning component is provided on the outer surface of the photovoltaic panel for cleaning the photovoltaic panel surface and preventing dust from obstructing power generation efficiency. This invention, by providing an axially sliding wear-resistant component on the outer side of the overhead conductor and matching it with a moving component, can automatically adjust the protection point position to achieve dynamic wear protection. A motor-driven worm gear transmission drives a pulley to move and lock itself, simultaneously driving the cleaning component to clean the photovoltaic panel, ensuring stable self-power supply and improving the conductor's service life and operational reliability.

The application provides a dredging pipeline gradient surfacing layer resistant to sediment erosion and peeling and a preparation method thereof, and belongs to the technical field of advanced steel materials and hard surfacing flux-cored wires. The surfacing layer is formed on the inner wall of a steel base pipe, and comprises an overall continuous buffer layer and a pipe end interface area surfacing layer, a flow impact area surfacing layer and a non-flow impact area surfacing layer arranged in zones on the buffer layer, and a composition transition zone is arranged at the junction of the zones. The scheme is aimed at the problem that the impact, erosion, corrosion and sliding wear effects of different positions on the inner wall of the dredging pipeline are inconsistent, and through the cooperation of the buffer layer transition, spatial zoning, thickness gradient and controlled cooling, the surfacing layers in each region are adapted to the actual service load, and the interlayer bonding stability, the zone junction stability and the overall protection requirement of the inner wall are considered, and the surfacing layer is suitable for the strengthening and repair of the inner wall of the marine dredging pipeline.

In addition to maintaining a low coefficient of friction, the aim is to improve resistance to micro-sliding wear. [Solution] A film is formed on the surface of a substrate made of copper or a copper alloy. The film comprises a nickel layer made of nickel or a nickel alloy formed on the surface of the substrate, a copper-tin alloy layer made of a copper-tin alloy formed on the nickel layer, and a tin layer made of tin or a tin alloy formed on the copper-tin alloy layer. The average thickness of the nickel layer is 0.30 μm or more and 3.00 μm or less, the average thickness of the copper-tin alloy layer is 0.30 μm or more and 1.20 μm or less, and the average thickness of the tin layer is 0.15 μm or more and 0.80 μm or less. The copper-tin alloy layer contains a Cu6Sn5 alloy whose interface with the tin layer has an uneven shape. The average thickness of the protrusions of the Cu6Sn5 alloy in a cross section parallel to the rolling direction of the substrate is 0.80 μm or more and 3.00 μm or less. The average KAM of the Cu6Sn5 alloy in a cross section parallel to the rolling direction is 0.55° or more and 0.80° or less.

The invention relates to the technical field of well drilling string wear analysis, and particularly discloses a drilling string impact sliding wear experimental device and experimental method. The drilling string impact sliding wear experiment device comprises a supporting system, a lifting system, a vortex motion system and an environment system. According to the application, the active dynamic behavior of flexible self-excited vortex motion of the drill string is reproduced, and the contradiction that high-precision observation and extreme environment simulation cannot be compatible on the same device is solved through a visual / high-temperature closed switchable modular environment system. On the basis of the device, a non-uniform impact wear coupling high-temperature corrosion environment can be truly reproduced in a flexible vortex nonlinear contact form of the drill string to carry out a wear test. The experimental result of the device is similar to the material performance under the actual underground complex dynamic working condition.

The invention provides a clutch friction work calculation method and device, equipment, a medium and a program product, and relates to the technical field of vehicles. According to the clutch friction work calculation method, the current friction power and the first clutch temperature in the current calculation period are calculated in response to the slip friction state of a clutch, and the first clutch friction work is calculated according to the current friction power; according to the first clutch temperature, determining first clutch friction work which is friction work generated by the clutch during the sliding friction duration, and according to the first clutch temperature, determining second clutch friction work which is friction work dissipated by the clutch during the sliding friction duration, then the first clutch friction work is corrected according to the second clutch friction work, the target clutch friction work is obtained, the accuracy of clutch friction work calculation is improved, and then the risk of false triggering of a clutch thermal overload protection mechanism is reduced.

The invention relates to the technical field of electric connector reliability simulation, and particularly discloses an electric connector plugging life prediction method based on wear depth-contact resistance, comprising the following steps: determining electric connector electric contact material parameters and load conditions; carrying out a current-carrying electric contact wear experiment to obtain a friction coefficient and a wear coefficient, and calibrating wear depth and sliding wear times corresponding to electric contact failure; establishing an electric connector wear finite element model; on the basis of a friction dissipated energy wear model, wear depths under different wear times are obtained; and determining the plugging wear life of the electric connector according to the wear depth corresponding to the electric contact failure. According to the method for predicting the plugging wear electric contact life of the electric connector, whether the electric contact fails or not can be judged by comparing the thickness of the plating layer according to the plugging wear depth, the method can be used for evaluating the plugging wear mechanical property of the electric connector capable of being in split contact, the optimal design of the structural parameters of the electric connector is supported, and the reliability of the electric connector is improved.

The present application belongs to the technical field of bearing wear resistance detection, and particularly relates to a method for bearing wear resistance detection. The method comprises the steps of data acquisition, primary detection, secondary detection and comprehensive evaluation. The data acquisition acquires real-time temperature and sound data, including environmental temperature and background noise interference. The primary detection performs difference calculation, Kalman filtering and compensation correction on the temperature data, and performs time-frequency spectrum analysis and frequency band noise reduction on the sound data. The primary wear index is calculated by fusing the two, and if the primary wear index is less than a first threshold value, it is determined to be qualified, otherwise, it enters the secondary detection. The secondary detection collects the rolling body, inner ring and outer ring slide wear images, and calculates the secondary wear index through a double-branch convolution network after preprocessing and comparing with the non-wear image. The comprehensive wear degree is obtained by weighted fusion of the two-stage indexes, and if the comprehensive wear degree is greater than a second threshold value, it is determined to be unqualified and an alarm is given, otherwise, it is qualified. The method dynamically eliminates environmental interference, combines multiple parameters and image features, and improves the detection accuracy and reliability.

The utility model discloses a multi-damping friction pendulum support, and relates to the technical field of bridge supports. The upper seat plate is positioned above the lower seat plate; the pair of damping assemblies is connected between the lower seat plate and the upper seat plate; and the sliding wear-resistant assembly is connected between the lower seat plate and the upper seat plate. Therefore, the damping device has the advantages of multiple damping and overturning resistance.