221 results about "Friction test" patented technology

The invention relates to the technical field of wear resistance testing, in particular to a wear resistance testing device for a wear-resistant coating, which comprises a testing box, a mounting groove is formed in the top of the testing box, a protective cover is hinged to the top of the mounting groove, and a reciprocating rotating mechanism for a rotating friction test and a reciprocating friction test is arranged on the right side of the top of the mounting groove. A swing impact mechanism used for swing impact friction is arranged on the left side of the top of the mounting groove, supporting legs are fixedly connected to the four corners of the bottom of the test box correspondingly, and a control panel is fixedly mounted on the left side of the top of the test box. According to the device, reciprocating rotary friction testing and reciprocating linear friction testing are carried out on coatings of a plurality of substrates at the same time, the abrasion resistance of the coatings in different friction states can be tested, the detection accuracy is improved, reciprocating rolling friction testing and impact testing on the coatings are achieved through the swing impact mechanism, and the testing efficiency is improved. The wear resistance of the coating in various environments can be conveniently simulated, the detection can be performed without replacing equipment, and the test efficiency is high.

The utility model discloses a rock sample friction test device which comprises a bottom plate, a first movable seat, a second movable seat, a first force sensor and a second force sensor, the first movable seat is connected to the bottom plate in a sliding mode, the first force sensor is arranged between the bottom plate and the first movable seat, and the second force sensor is arranged between the bottom plate and the second movable seat. The force sensor is used for measuring the stress of the first movable seat and the bottom plate in the relative sliding direction; the second movable seat is connected to the first movable seat in a sliding mode, the relative sliding direction of the second movable seat and the first movable seat is perpendicular to the relative sliding direction of the first movable seat and the bottom plate, and the second force sensor is arranged between the first movable seat and the second movable seat. And the force sensor is used for measuring the stress of the second movable seat and the first movable seat in the relative sliding direction. The friction test device can be used for stably and conveniently carrying out friction test on the rock sample.

The invention discloses a wide-temperature-range self-lubricating coating friction and wear performance evaluation method and a test system. The method comprises the following steps: preparing a sample of a self-lubricating coating on the surface of a matrix, cleaning the matrix sample and a counter-abrasion sample, carrying out friction test at multiple temperature points by adopting set parameters, recording change data of friction coefficients along with time in real time, calculating stable friction coefficients at each temperature point according to the data of the friction coefficients, and calculating the abrasion rate according to the abrasion crack condition. Therefore, accurate, reliable and repeatable coating tribological performance data can be obtained. According to the method, the change rule of the coating performance along with the temperature can be comprehensively represented, the problems that an existing test method is large in data fluctuation and cannot truly reflect the wide-temperature-range service performance are solved, and a key test basis is provided for research, development, screening and application of the high-performance self-lubricating coating.

The invention relates to the technical field of detection equipment, in particular to a textile fabric wear resistance testing device which comprises a base, a multi-unit friction mechanism and an auxiliary mechanism are arranged on the base, each unit friction mechanism comprises a pressing block inserted into the inner wall of the base in a sliding mode, and the pressing blocks are used for pressing cloth. And a mounting frame for driving the friction unit to rotate is mounted on the inner wall of the top of the pressing block. Through the arranged multi-unit friction mechanism, in the process that a mounting frame drives a grinding block and a grinding disc to revolve, the grinding block slides in a reciprocating mode in the radial direction, meanwhile, an impact rod continuously impacts cloth at the circle center, and a second gear drives the grinding disc to rotate; therefore, friction tests in different forms can be carried out on circumferential areas with different radiuses of the cloth, the test effect is greatly improved, the contingency of a detection result is prevented, and the conditions that the friction form of a detection mode in the prior art is relatively single, the detection mode is difficult to adapt to different types of cloth, and the detection effect is relatively poor are avoided.

The invention provides a gas compressor blade titanium fire friction test device and test method. The gas compressor blade titanium fire friction test device is used for testing the flame retardant property of a blade sample piece of a gas compressor, and is characterized by comprising a first rotating piece, a second rotating piece and a friction piece, wherein the friction piece is arranged on the first rotating piece; the blade sample piece is assembled on the second rotating piece, and the blade sample piece and the friction piece are arranged to be opposite to each other; the first rotating part can rotate in a first direction, and the second rotating part can rotate in a second direction opposite to the first direction; in the rotating process of the first rotating piece and the second rotating piece, the friction piece makes contact with the blade sample piece, and then the blade sample piece is rubbed. The test device can better simulate the working environment of the high-pressure compressor.

The utility model relates to the technical field of aircraft tire tread rubber friction test, in particular to aircraft tire multi-angle friction force detection equipment, which is provided with an angle adjusting mechanism and a friction mechanism, so that in the aircraft tire tread rubber friction test process, the material friction force can be tested in a multi-angle manner; and the detection accuracy is improved. The device comprises a lifting mechanism, the device further comprises an angle adjusting mechanism, a rotating mechanism, a rotating mechanism and multiple sets of friction mechanisms, the angle adjusting mechanism is installed on the lifting mechanism, the rotating mechanism is installed on the angle adjusting mechanism, the rotating mechanism is installed on the lifting mechanism, and the multiple sets of friction mechanisms are installed on the rotating mechanism. The lifting mechanism is used for lifting, the angle adjusting mechanism is used for adjusting angles, the rotating mechanism is used for rotating, and the friction mechanism is used for detecting.

The utility model relates to the technical field of ink friction tests, and discloses an ink abrasion resistance tester which comprises a main machine, a placing plate is fixedly installed on the outer wall of the main machine, a moving rod is fixedly assembled on the outer wall of the main machine, a fixing block is movably connected to the outer wall of the moving rod in a sleeved mode, and a weight is fixedly assembled on the top of the fixing block. And a fixed shell is fixedly mounted at the top of the placement plate, and an extension shell is fixedly mounted on the outer wall of the fixed shell. By rotating a second threaded rod, the second threaded rod drives a telescopic plate to move towards the bottom of an inclined block through a transverse plate, the inclined block is jacked up through attachment of the inclined block and the telescopic plate, then the inclined block drives a first magnet to move upwards, and at the moment, an ink sample is placed on the top of a second magnet; a telescopic plate is retracted by rotating a second threaded rod, then a first magnet is pressed downwards through a spring, the first magnet is attached to the top of the ink sample, and then the ink sample is fixed through attraction force of the first magnet and the second magnet.

The invention discloses a high-temperature friction testing device for a hydraulic slide valve. The device is composed of a valve element clamping module, a valve body mounting module, a vertical force applying module, a high-temperature heating module and a friction force applying module. The valve element clamping module is composed of a valve element, a valve element centering fixing column, a valve element fixing clamp, a valve element mounting rod and a mounting rod fixing shell. The valve body mounting module consists of an oil storage tank, an oil storage tank fixing plate and a valve body; the vertical force applying module comprises X, Y and Z three-axis guide rails driven by a motor, and pressure and friction force sensors; the high-temperature heating module surrounds the whole valve body and the valve core mounting part; the friction force applying module is driven by a motor to drive the oil storage tank to achieve axial movement of the valve body, and relative friction between the valve element and the valve body is achieved. The device can carry out friction tests of the hydraulic slide valve at different temperatures, realizes friction wear simulation of the hydraulic slide valve under multiple working conditions of oil environment, high temperature, pollution and the like, and provides data support for wear and degradation tests of the hydraulic slide valve.

The utility model discloses a device for testing the friction coefficient of air bag cloth. The device comprises a test board, a movable arm, a friction block and a clamping block, supporting rods are vertically arranged at the two ends of one side of the top of the testing table and penetrate through guide holes in the two sides of the clamping block, the clamping block is installed on one side of the top of the testing table in a liftable mode through sliding fit between the guide holes and the supporting rods, and a first sliding groove extending in the horizontal direction is formed in the rear side of the testing table. The bottom end of the movable arm is movably installed in the first sliding groove through a sliding connection structure, a second sliding groove extending in the vertical direction is formed in the upper portion of the front wall of the movable arm, a sliding block is slidably installed in the second sliding groove, and a lifting arm is fixedly installed at the front end of the sliding block. According to the utility model, by controlling the motion trails of the movable arm, the lifting arm and the friction block, seamless switching between precise positioning and bidirectional friction testing of a test part can be realized, operation errors and efficiency loss caused by manual adjustment are avoided, and the test efficiency and the data reliability are remarkably improved.

This invention relates to a piston ring-cylinder liner friction testing system, comprising a piston ring, a cylinder liner, a piston ring-cylinder liner fixing assembly, a piston ring-cylinder liner heating assembly, a lubricating oil supply assembly, and a power assembly. The piston ring-cylinder liner fixing assembly includes a housing, an elastic thrust rod, steel balls, a tension / compression sensor, a bracket, and a piston ring clamp. The bracket is located on the single-cylinder engine of the power assembly, and the housing is located on the bracket. An annular oil groove is provided on the inner wall of the bottom of the housing, and an oil outlet communicating with the annular oil groove is provided at the bottom of the housing. The cylinder liner is located inside the housing, with its sidewall facing the annular oil groove. The lubricating oil supply assembly includes an oil supply passage and an oil supply cap. The cap is located inside the cylinder liner, with its perimeter edges close to the inner wall of the cylinder liner. The cap has an oil supply port, providing circumferential oil supply to the cylinder liner. The testing system is located outside the single-cylinder engine, eliminating the need to modify the internal structure of the engine, thus saving costs and simplifying experimental operation.

The invention belongs to the technical field of oil and gas exploitation, and particularly relates to a performance testing device and method of an oil pipe and cable assembly for an oil and gas well, and the device achieves the active, accurate and repeatable simulation of the sag of an oil pipe through the cooperation of a first lifting mechanism, a second lifting mechanism and a self-adaptive displacement assembly. Uncontrollability caused by natural droop depending on gravity in a traditional method is overcome; through cooperation of the first displacement assembly and the adjusting assembly, rapid and accurate alignment of a friction test point and a maximum droop point and stepless accurate regulation and control of test pressure are realized, so that a cable wear resistance test result is more scientific and has higher comparability; and the measurement mechanism is combined with the second displacement assembly, so that automatic and high-precision scanning measurement of the overall deflection curve of the oil pipe is realized, and low-efficiency and inaccurate manual measurement is replaced. The whole device is highly integrated and automatic, and the test efficiency, the data consistency and the reliability are remarkably improved.

This utility model discloses a carbon brush friction test bench fixture structure, including a clamping seat for clamping carbon brushes and a fixing seat. The fixing seat includes a base plate and two side plates fixed to the upper side of the base plate. Each of the two side plates has a first through hole, and the clamping seat has a second through hole. The clamping seat is inserted between the two side plates. A clamping nut is screwed onto the threaded end of a clamping bolt after passing through the first and second through holes. The clamping seat of this utility model is rotatably and adjustablely mounted on the fixing seat via the clamping bolt, allowing for convenient adjustment of the carbon brush angle. Once the angle is adjusted, the clamping bolt is tightened, thereby fixing the clamping seat and the fixing seat.

The invention provides a plastic film wear resistance detection device, and relates to the technical field of plastic film detection, the plastic film wear resistance detection device comprises a bottom frame, a tooth pressing mechanism, a fixing mechanism, a lifting table, a friction mechanism and an adsorption mechanism, the bottom frame is provided with an unwinding piece and a winding piece, and the tooth pressing mechanism is used for pressing tooth mark lines on a plastic film roll; and the fixing mechanism is used for separating the part enclosed by the tooth mark lines from the plastic film roll and fixing the sample. The lifting table is installed on one side of the fixing frame, the friction mechanism and the adsorption mechanism are located on the two opposite sides of the lifting table respectively and can switch the relative positions, when the friction mechanism is located on the upper portion of a plastic film, a friction test is conducted on the plastic film, and the positions of the adsorption mechanism and the friction mechanism are switched after the test is completed. And the sample is adsorbed through the adsorption mechanism to judge whether the sample meets the wear-resistant requirement. According to the invention, the continuous test of the whole roll of plastic film can be realized, each sample can be conveniently detected after the test is finished, and the detection result can be conveniently and quickly obtained after the detection is finished.

The invention discloses a mechanical property comprehensive test platform, which belongs to the technical field of power system support equipment testing, and comprises a console, and a test board is arranged on the right side of the console; a clamp is arranged on the back face of the control table, and a bending resistance testing assembly matched with the clamp is arranged on the testing table. One side, close to the console, of the test board is provided with an anti-torsion test assembly I, and the right side of the anti-torsion test assembly I is provided with an anti-torsion test assembly II matched with the anti-torsion test assembly I; a multifunctional test assembly is arranged on the test board and is used for carrying out a cross arm bending resistance test and a fastener friction force test; and a tensile test assembly for testing the composite insulator is arranged on an internal groove of the test board. Different mechanical properties of different parts can be tested through one test platform, the number of test equipment is reduced, the test process is simplified, the test efficiency is improved, and the test platform has positive influences on design, manufacturing and research and development of the parts in a power system.

The invention belongs to the technical field of new material detection, and discloses an orthodontic correction arch wire friction corrosion test system, which comprises a controller, a mechanical excitation device and an electrochemical workstation, and is characterized in that the controller controls the electrochemical workstation to apply polarization pulses to form an ion sheath for neutralizing friction charges; the method comprises the following steps: firstly, carrying out mechanical damage and electrochemical response on the surface of a material, then controlling a mechanical excitation device to apply single instantaneous mechanical scratch, immediately triggering an electrochemical workstation after the scratch is finished, and recording an electrochemical relaxation transient process of spontaneous repassivation of the surface of the material in a static environment without mechanical interference. The technical problem that the dynamic repairing capacity of the material cannot be accurately evaluated due to signal aliasing in an existing continuous friction test is solved, and the obtained data is no longer a fuzzy average value but a clear dynamic fingerprint containing rich physical mechanisms.

A sports shoe sole bearing capacity testing device comprises a base, an extrusion mechanism, a crank rocker mechanism, a resilience force testing mechanism, a friction force testing mechanism and a central control unit. The base is provided with a horizontal reference plane; the extrusion mechanism comprises a translation fixed sliding table, a vertical pressing assembly and a horizontal pushing assembly; the crank rocker mechanism is arranged on the driving side of the sliding table, consists of a servo motor, a turntable and a driving rod, and can drive the sliding table to translate; the resilience force testing mechanism is located on the opposite side of the moving end point of the sliding table and comprises a horizontal moving platform, an adjusting lead screw and a horizontal pressure tester coaxial with the moving direction of the sliding table. The friction force testing mechanism is arranged below the extrusion mechanism and is composed of a replaceable simulation test board, a movable guide rail and a friction force tester, and the guide rail is rigidly connected with the base; the central control unit is in signal connection with the servo motor and the two types of pressure testers, a programmable multi-test-mode switching module is arranged in the central control unit, and switching of multiple test modes can be achieved.

The utility model relates to the field of wear resistance of calendaring machines, in particular to a friction resistance testing device of a calendaring machine, which comprises a working table, a supporting plate connected to the upper side of the rear part of the working table, a connecting plate connected to the supporting plate in a sliding manner, two preformed holes formed in the left and right parts of the connecting plate, and grooves formed in the upper sides of the left and right parts of the supporting plate, a rolling assembly is connected to the lower portion of the connecting plate, a limiting piece is installed on the upper side of the workbench, a circle of sliding groove is formed in the limiting piece, six guiding pieces are connected into the sliding groove in a sliding mode, and connecting pieces are connected to the guiding pieces. Through the arrangement of the rotary connecting piece and the three testing modules, a plurality of material modules are allowed to be tested at the same time, the testing efficiency is improved, the abrasion resistance of different materials can be compared, the position of the calendering assembly can be adjusted according to the material modules with different thicknesses through the combination of the reserved holes and the grooves, and the testing efficiency is improved. The optimal tightness of each test is ensured, and the adaptability of the device is enhanced.

The utility model relates to the technical field of friction testing, and discloses a friction coefficient testing device for injection molding products, which comprises a friction coefficient tester and a test placing plate mounted in the middle of the top of the friction coefficient tester, and sliding plates are fixedly connected to two sides of the top of the friction coefficient tester. According to the utility model, during testing, the U-shaped pressing plate is rotated, pressed and fixed on one side of the mouse pad, then the pull handle is pulled, the U-shaped sliding rod is triggered to drive the linkage assembly to slide, and the smoothing block automatically falls to be attached to the surface at a specific position by utilizing the mechanical cooperation of the spring and the guide rod, so that the mouse pad is flattened, and the test efficiency is improved. And when the U-shaped sliding rod abuts against the limiting position, the smoothing block and the U-shaped lower pressing plate form bidirectional elastic clamping, finally, a test weight is hung according to needs, a friction test is driven by a traction sensor, data are displayed on a tester in real time, and the accuracy and reliability of the friction coefficient test of the injection molding mouse pad are remarkably improved.

The present invention discloses a method for measuring the dynamic and static contact stiffness of bearing rollers based on a digital twin model, comprising: separately constructing a rotor system and a bearing system; for the rotor system, designing an algorithm based on VGWO‑DBSCAN‑AMD to perform modal parameter identification and designing a response surface algorithm to perform simulation model correction, thereby obtaining a high-precision rotor system simulation model; for the bearing system, conducting a friction test to obtain the bearing roller friction coefficient and building an initial simulation model of the bearing system; obtaining a digital twin model by assembling the bearing system and rotor system simulation models; operating a system test bench and the digital twin model under the same operating conditions and simultaneously extracting time domain vibration signals, performing correlation analysis on the vibration characteristics using a correlation evaluation criterion, adjusting the roller contact stiffness to obtain the true value of the contact stiffness of the test bench under different operating conditions, and fitting the contact stiffness under multiple operating conditions to obtain the bearing roller contact stiffness value within the full operating range of the test bench.

The application discloses a kind of ceramic coating self-lubricating life estimation methods based on ultraviolet accelerated aging.The method comprises the following steps: preparing vacuum impregnation oil-containing ceramic coating sample;Using ultraviolet accelerated aging condition of ultraviolet irradiation, lightless condensation alternative cycle, respectively at the interval 500h node sampling of cumulative aging time, dynamic friction coefficient is measured, and discrete data points are obtained;Discrete data points are processed using piecewise interpolation method, and the piecewise continuous corresponding relationship of dynamic friction coefficient with ultraviolet aging time is established;With dynamic friction coefficient ≤0.4 as self-lubricating effective threshold, the aging time corresponding to the first time when friction coefficient reaches 0.4 is accurately positioned by the piecewise continuous corresponding relationship.The application realizes the complete tracking and life estimation of coating self-lubricating performance from initial service, performance attenuation to final failure, and makes up for the deficiency that conventional friction test can only evaluate initial lubricating performance but cannot estimate self-lubricating life after ultraviolet aging.

The invention provides a method for predicting the friction performance of a titanium alloy surface coating based on image features. The method comprises the following steps: preparing an electroplating solution; the Ti6Al7Nb titanium substrate is subjected to pretreatment; a titanium substrate is used as a cathode, a copper rod is used as an anode, and the copper and nano-hydroxyapatite composite coating is obtained through a jet electrodeposition process; collecting a coating surface image, and obtaining a coating surface friction coefficient through a friction test; extracting image features and carrying out normalization processing on test data; obtaining the most significant factors influencing the friction coefficient of the coating according to a grey correlation analysis method; and establishing a prediction model of the average friction coefficient with respect to image features based on a multiple regression algorithm, and performing reliability analysis. According to the method, the surface friction coefficient can be effectively predicted through the surface image features on the premise that the integrity of the titanium alloy coating is not damaged.

The present application provides a laminate capable of achieving excellent slidability regardless of whether or not a user's finger is wetted with water, an optical member with the laminate, and an image display device. The laminate of the embodiment of the present application has a substrate and a functional layer disposed on one side in the thickness direction of the substrate, and the static friction coefficient and the kinetic friction coefficient of the functional layer surface measured using a contact wetted with water are both 0.13 or less in a specific friction test based on a Bowden method of surface contact.

The invention relates to a test and evaluation device (21) for calibrating bearing test benches (1, 20), comprising a plurality of bearing test benches (1, 20), each of which is designed as a friction test bench for testing a swivel bearing (2) having two bearing rings (6, 7). The test and evaluation device (21) further comprises data capture devices (17, 18) which are assigned to individual bearing test benches (1, 20) and which are connected to a common data processing unit (19) which is designed to compare specific properties of the bearing test benches (1, 20) with one another.

The present invention discloses a battery shell strength testing device, which relates to the technical field of battery production. The device comprises a base, a synchronous testing mechanism for simultaneously performing multiple strength tests on the battery shell is arranged on the top of the base, a rotating mechanism for changing the direction of the battery shell is also arranged on the top of the base, the synchronous testing mechanism comprises a rotating disk rotatably connected to the top of the base, a bracket is also fixedly connected to the top of the base, a hollow rod is vertically slidably connected to the top of the bracket, a grinding disk for testing the strength of the battery shell is fixedly connected to the bottom of the hollow rod, an impact rod is slidably connected inside the hollow rod, and the bottom of the impact rod is pointed. By providing the synchronous testing mechanism, the impact resistance test of the battery shell can be simultaneously performed when the friction test is performed on the battery shell. By performing the friction and impact resistance tests simultaneously, the performance data of the shell under two different stress conditions can be obtained in one experiment, thereby reducing the time and cost required for repeated settings and execution of separate tests.

This invention provides a device for testing the abrasion resistance of plastic films, relating to the field of plastic film testing technology. It includes a base frame, a tooth-pressing mechanism, a fixing mechanism, a lifting platform, a friction mechanism, and an adsorption mechanism. The base frame is equipped with an unwinding component and a rewinding component. The tooth-pressing mechanism is used to press tooth marks onto the plastic film roll. The fixing mechanism is used to detach the portion enclosed by the tooth marks from the plastic film roll and fix the sample. The lifting platform is installed on one side of the fixing frame. The friction mechanism and the adsorption mechanism are located on opposite sides of the lifting platform and their relative positions can be switched. When the friction mechanism is located on the upper part of the plastic film, a friction test is performed on the plastic film. After the test, the positions of the adsorption mechanism and the friction mechanism are switched, and the adsorption mechanism adsorbs the sample to determine whether the sample meets the abrasion resistance requirements. This invention enables continuous testing of an entire roll of plastic film. After each sample test, convenient testing can be performed, and test results can be obtained quickly and easily.

The invention relates to the technical field of billiard table cloth testing, in particular to a full-automatic friction testing device for billiard table cloth, which comprises a bearing table plate, a cloth tightening mechanism, a transverse sliding rail, a sliding table, an industrial camera, a range finder and a controller. The frame-shaped groove is formed in the bearing table plate and is in embedded type pressing fit with the cloth tightening mechanism, it is ensured that the to-be-tested billiard table cloth can be flatly and compactly fixed, the cylinder is arranged to drive the tested billiard balls to roll on the billiard table cloth, the simulation friction test of the billiard table cloth is achieved, and the test efficiency is improved. The friction test is closer to the actual use condition of the billiard table cloth, meanwhile, real-time detection data collection of the industrial camera and the distance measuring instrument and automatic judgment of the controller are introduced, full-automatic billiard table cloth friction test is achieved, the friction test efficiency is greatly improved, and the test cost is reduced. And the accuracy of a test result is improved through a simulation type friction test.

The utility model belongs to the technical field of wear resistance testing devices, and particularly relates to a wear resistance testing device suitable for a piston sealing ring, which comprises a testing cabinet and a control panel arranged on the surface of the testing cabinet, one side of the testing cabinet is connected with a supporting bottom frame, one side of the testing cabinet is connected with a rotating shaft, and the rotating shaft is connected with a rotating shaft. According to the piston sealing ring testing device, the limiting plate is stretched outwards, then a piston sealing ring to be tested is connected to the clamping end of one end of the clamping block, at the moment, the first linkage plate connected with the limiting plate pulls the clamping spring to be elastically stretched, the piston sealing ring to be tested is clamped in the clamping spring, and then the piston sealing ring to be tested is clamped in the clamping spring. The piston sealing ring to be tested is rapidly clamped and stabilized, then the air cylinder is driven to enable the piston sealing ring to be close to the abrasive paper wheel, friction testing is conducted on the piston sealing ring through rotation of the abrasive paper wheel, and then the abrasion loss is weighed through the electronic scale. And the wear resistance of the piston sealing ring can be accurately known.

The application provides a friction experiment device and method applied to inhibiting crawling research. The device comprises a motion control device, a balancing device, a friction device structure, a data acquisition device and a control unit. The application controls a stepping motor to realize low-speed motion, detects displacement and friction force change trends when crawling occurs, provides different system stiffness by using a spring, records friction force and displacement changes of a friction pair during motion, evaluates the crawling degree of the friction pair, and finds out measures for inhibiting crawling. The structure is simple, and observation is convenient.

The invention relates to the technical field of oil and gas exploitation, and discloses a thickened carbon dioxide fluid flow friction resistance testing system and method. The method comprises the following steps: S1, liquefying carbon dioxide gas into liquid carbon dioxide; s2, preparing the liquid carbon dioxide, a cosolvent and a thickening agent into a thickened carbon dioxide fluid, and recording the density as shown in the specification; s3, the thickened carbon dioxide fluid is introduced into the testing pipeline, the flow speed of the thickened carbon dioxide fluid introduced into the testing pipeline is as follows, and the pressure difference of the thickened carbon dioxide fluid flowing through the inlet end and the outlet end of the testing pipeline is recorded; s4, calculating the friction resistance coefficient according to a formula (1), wherein D is the diameter of the test pipeline; l is the length of the test pipeline; s1 and S2 are the solubility of the cosolvent and the thickening agent in the liquid carbon dioxide. The invention creatively provides a friction coefficient calculation formula, and the numerical relationship between the friction of the thickened carbon dioxide fluid in the shaft and each parameter can be quickly calculated and evaluated according to the formula.

The present application relates to the technical fields of bearing friction test, especially to a kind of experimental measuring device and measuring method of rolling bearing rolling body drag resistance. Including the low-speed wind tunnel of air suitable for providing wind speed for experimental piece, the low-speed wind tunnel is fixed on wind tunnel support, and the low-speed wind tunnel includes wind tunnel experimental section, and the front end of wind tunnel experimental section is provided with pitot tube, experimental piece is arranged on the measuring structure of wind tunnel experimental section, force sensor is arranged on the measuring structure, and force sensor is connected with force acquisition computer by force acquisition module, and wind tunnel control computer is further arranged on the low-speed wind tunnel. The present application can not only measure the drag resistance of bearing rolling body under different incoming flow velocity conditions, but also meet the measurement requirements of different sizes and different types of rolling bodies;Its device is simple to operate, and the drag resistance of bearing rolling body under different constraint space conditions can be measured simultaneously.