CN107340087A - Simulation measuring device for high-stress contact lubricating oil film friction force - Google Patents

Abstract

The invention belongs to the field of measurement of high secondary point contact elastohydrodynamic friction force, and relates to a simulation measurement device for high stress contact lubricating oil film friction force. The adjustment device, the loading rotary device and the translation device, the disc drive device is fixed on the upper surface of the support platform near the front edge, the contact between the steel ball and the flat round steel disc is used to simulate the contact between the roller and the bearing raceway, the sensor is fixed and adjusted The device is located at the front of the left and right edges of the translation table to measure the friction between the steel ball and the disc. The loading and rotating device is fixed in the middle of the rear edge of the translation table and is controlled by adjusting the spring adjustment nut in the loading and rotating device. The magnitude of the force loaded by the loading plate has a simple main structure, ingenious design concept, accurate measurement results, simple and convenient operation, scientific principle, convenient and flexible use, strong practicability, good application environment, and broad market prospects.

Description

A device for simulating and measuring the oil film friction of high-stress contact lubricating oil

Technical field:

The invention belongs to the field of measurement of high secondary point contact elastohydrodynamic friction force, and relates to a friction measurement experimental simulation device, in particular to a simulation measurement device of high stress contact lubricating oil film friction force, which can measure ball bearings in different motion state conditions Under the friction force simulated measurement.

Background technique:

A large number of components in engineering are in high-pair contact, and depending on the operating conditions, their lubrication states are mostly under elastohydrodynamic lubrication, mixed lubrication and boundary lubrication. Exploring the lubrication mechanism under mixed lubrication and boundary conditions is the focus of research in the field of tribology , especially the improvement of the surface quality of the contact pair by processing technology and the use of new lubricating materials require a new understanding of the lubrication mechanism. The oil film friction measurement is mainly carried out by a gravity testing machine. In the prior art, the Chinese patent application number CN2736771Y discloses a comprehensive performance evaluation testing machine for lubricating oil, which includes a power unit, a friction pair, an oil holding device, and a loading device. , fixed shaft, the friction pair includes a rotor and a stator, the patent uses weights to load, and utilizes the principle of leverage to make the stator and the rotor at the friction point slide and rub, and record the final oil temperature change and the wear marks of the friction pair through the temperature control device test To evaluate the anti-wear performance of lubricating oil, the utility model is simple in design, easy to operate, and easy to carry. However, the patent still has the following defects. First, the accuracy of evaluating the anti-friction and anti-wear performance of lubricating oil through wear marks is not high , there is no accurate standard to judge the size of the wear scars, and the wear scars themselves are also irregular. Different people have different judgments on the wear scars, which will lead to personnel errors. Second, it needs to be replaced after each test. Repairing the friction pair increases manpower, material and financial resources. Third, the temperature is easily affected by the external environment, which makes the accuracy of the measurement results not high. Fourth, the utility model cannot obtain the test results at the first time and needs to be calculated. Therefore, in order to overcome the technical defects in the previous measurement devices, a practical experimental device was developed to accurately measure the friction of high-stress contact lubricating oil film, so as to provide data support for its research. In the study of high-stress contact lubricating oil film friction In the process, in order to simplify the analysis, the contact between the roller and the bearing raceway is equivalent to the contact between the roller and the plane, and a simulation measurement device for the friction force of the lubricating oil film under high stress contact is designed and prepared.

Invention content:

The purpose of the present invention is to overcome the problems existing in the prior art, and seek to design and provide a kind of simulation measurement device of high stress contact lubricating oil film friction force, utilize the contact of steel ball and flat circular steel disc to simulate the contact between roller and bearing raceway Contact, to obtain friction data with high accuracy and good repeatability, to provide experimental data support for research on friction of lubricating oil film in high-stress contact.

In order to achieve the above object, the main structure of the simulation measuring device of high stress contact lubricating oil film friction force involved in the present invention includes: supporting platform, disk driving device, steel ball fixing device, sensor fixing and adjusting device, loading rotary device and translation device; the support platform has a four-leg support structure at the bottom, and the upper ends of the four support feet are respectively fixedly connected to the four corners of the table; the disc drive device is fixedly placed on the upper surface of the support platform near the front edge, and its main structure includes: Round steel disc, fixing device, driven pulley, driven shaft, disc drive motor support, disc drive motor, synchronous pulley, fixed disc and sleeve; the round steel disc is fixedly placed on the upper end of the driven shaft, and the The upper end of the round steel disc is equipped with a circular fixing device for fixing the round steel disc, the lower end of the driven shaft passes through the fixed through hole on the translation device, and the lower end of the driven shaft is fixed with a driven pulley for The power of the synchronous pulley is transmitted to drive the driven shaft to rotate. The lower end of the driven shaft is close to the upper side of the driven pulley, and a cylindrical hollow sleeve is movable, and the upper end of the sleeve is fixedly connected with a fixed plate. The driven shaft It can freely rotate around the chamber in the middle of the sleeve, and bolt holes are opened at the corresponding positions on the periphery of the fixed disk and the fixed through hole, which are used to fix the fixed disk on the table and to fix the disk drive device; I-shaped The disc drive motor support of the structure is fixed on the right edge of the table, the notch of the disc drive motor support faces inward, and a disc drive motor for providing power is fixed inside the notch, and the disc drive motor The output shaft passes through the lower side plate of the disk drive motor support and is connected with the synchronous pulley to drive the synchronous pulley to rotate.

The steel ball fixing device is located on the upper side of the round steel plate, and its main structure includes: a steel ball support, a steel ball sleeve, a tension wire nut and a steel ball; the steel ball support is a round rod-shaped structure, and its upper end is connected to The outer end connection of the loading plate in the loading slewing device is used to transfer the force loaded by the loading slewing device to the steel ball support. The lower end of the steel ball support is threaded to connect the cylindrical steel ball sleeve, and the outer surface of the steel ball sleeve There are two tension wire nuts on the upper side, the angle between the two tension wire nuts on the steel ball sleeve is 180°; it is connected with the pressure sensor in the sensor fixing and adjusting device through the tension wire; The lower end of the steel ball sleeve is covered with steel balls, and the lower end of the steel ball is in contact with the round steel disc as a high-stress contact pair, and the friction force change process of the contact pair is observed through a pressure sensor.

The sensor fixing and adjusting device is located at the front of the left and right edges of the translation platform, and its main structure includes: a one-dimensional translation platform, support feet, support screws, sensor connecting plates and tension and pressure sensors; the one-dimensional translation platform and the translation platform Movably connected, and can only move left and right along the translation platform, the upper surface of the one-dimensional translation platform is fixed with an L-shaped support foot, and the upper middle of the support foot is connected to the lower end of the support screw. The sensor connection plate is an L-shaped bent plate structure, the lower end is a vertical flat plate structure, and the upper end is a short horizontal plate structure bent outward. The outer side of the vertical flat plate structure is close to the inner side of the support foot. In the middle of the inner side of the vertical plate structure, a tensile pressure sensor is fixed, and the tension pressure sensor is connected with the tension wire nut through a tension wire, and the upper side of the support screw is connected with the short horizontal plate structure of the sensor connecting plate. Adjust the support screw to adjust the height of the sensor connection plate, and further adjust the height of the pressure sensor.

The loading and turning device is fixedly placed in the middle of the rear edge of the translation platform, and its main structure includes: loading plate, spring adjustment nut, spring, spring seat, supporting side plate, thrust shaft, bearing seat and thrust ball bearing; hollow cylindrical structure The bearing seat is fixedly placed on the translation platform, and the middle cavity is disposed with a thrust ball bearing. The thrust ball bearing is connected with the lower end bearing of the thrust shaft. The thrust shaft can rotate freely in the horizontal direction around the thrust ball bearing. The thrust shaft The upper side of the upper side is a cuboid plate structure, and the middle part of the thrust shaft is connected with the spring seat of the flat structure, and the upper end of the thrust shaft is connected with one end of the supporting side plate in a rotational manner, and the supporting side plate can rotate up and down around the thrust shaft; The other end of the supporting side plate is connected to one end of the loading plate, and the other end of the loading plate is connected to the steel ball support to load the steel ball fixing device; the upper side of the spring seat is fixed with a spring Adjusting nut, the upper end of the spring adjusting nut is equipped with a spring, the upper end of the spring is connected with the bottom of one end of the loading plate near the supporting side plate, in order to control the loaded force of the loading plate by adjusting the spring adjusting nut.

The translation device includes: a table top, a slider, a guide rail, a translation plate, a threaded front seat, a threaded rear seat, a translation screw and a fixed through hole; a fixed through hole is opened near the front edge of the table top, and a translation plate is arranged on the upper side of the table top , the lower surface of the translation plate is provided with a threaded front seat, and the upper surface of the table is provided with a threaded rear seat, the threaded front seat and the threaded rear seat are connected by a translation screw, and the rotation of the translation screw can realize the horizontal movement of the translation plate. The upper surface of the translation plate is equipped with a linear guide rail and a slider structure extending along the direction of the front and back of the table. The lower surface of the translation plate is provided with a groove matching the guide rail and the slider. The slider can slide in the groove to reduce the The friction resistance during the moving process of the translation plate is eliminated, and the steel ball fixing device, the sensor fixing and adjusting device and the loading and rotating device are moved back and forth through the forward and backward movement of the translation plate to adjust the radius of gyration of the round steel disc.

When the present invention measures high-stress contact lubricating oil film friction, the specific measurement steps are as follows:

1. Adjustment of turning radius and loading force:

First adjust the translation screw to adjust the front and rear positions of the translation plate, adjust the radius of gyration of the steel ball through the movement of the table position, adjust the spring adjustment nut according to the required loading force, and then place the corresponding weight on the loading plate for accurate loading;

2. Adjustment of the position of the pull pressure sensor:

First adjust the support screw to adjust the height of the sensor connecting plate, so that the tension and pressure sensor reaches the required height. After the adjustment, fix the support screw, and then move the one-dimensional translation platform to adjust the required tension. After the adjustment, fix it One-dimensional translation stage;

3. Acquisition of friction force:

Start the disc drive motor, the disc drive motor drives the driven pulley to rotate through the synchronous pulley, and transmits the power to the driven shaft to drive the round steel disc to rotate. The round steel disc and the steel ball together form a high-stress contact pair. The way the sensor is pulled is connected to the loading plate through the tension line, and the two tension pressure sensors are connected to the translation platform, and the tension line is pulled by moving the translation platform. The loading plate is not tightly constrained by the two tension pressure sensors. , can freely rotate around the loading and rotating device; and when the loading plate is restrained by two tension and pressure sensors, the loading plate will have a tendency to rotate under the action of the friction of the contact pair, and this tendency will be transmitted to the tension and pressure sensors. And then get the friction force;

4. On-line measurement and storage of friction force:

The friction force between the round steel disc and the steel ball is measured by the tension and pressure sensor, captured by the data acquisition card USB and transmitted to the PC end, and the PC end converts the analog signal into a digital signal. By calling the dynamic link library, the LabVIEW for data acquisition is processed Program design, realize the combination of LabVIEW and common data acquisition card USB, and then realize signal acquisition, processing and data storage, directly read the friction force through the acquisition interface, and complete the online measurement and storage of friction force;

5. Calibration of measuring equipment:

The system error in the measurement process can be calibrated by using two tension and pressure sensors to calibrate the system error. Since the rotation of the loading plate needs to be supported by the thrust ball bearing, if the steel ball moves or moves, it must overcome the thrust bearing itself. Rolling friction, in order to ensure the accuracy of friction measurement, the friction torque in the thrust ball bearing must be calibrated, using the sensor designed by Chen Jun to perform the pull test, the value measured by the pull pressure sensor is corrected, assuming that the resistance of the steel ball The frictional moment of motion is M, and the two tension and pressure sensors are respectively named sensor 1 and sensor 2 to distinguish them. When sensor 1 is fixed and sensor 2 moves at a constant speed, sensor 1 gets the tension value F ₁ , and sensor 2 gets F ₂ . have:

F ₂ X ₂ =F ₁ X ₁ +M (1)

In the above formula then there is

F ₂ ＝b+F ₁ k (2)

Among them, X ₁ and X ₂ represent the distances from sensor 1 and sensor 2 to the center of gyration respectively. It should be noted that although the ball-disk did not contact in the pull experiment, F ₂ in the experiment can be equivalent to The actual frictional force exerted by the lubricating oil film on the steel ball after the ball-disk contact. Therefore, in order to eliminate the influence of the friction torque in the thrust ball bearing, it is only necessary to read the value _of sensor F1, and the actual frictional force exerted by the lubricating oil film on the steel ball F2 is calculated by fitting _formula .

Compared with the prior art, the present invention adopts the structure of the steel ball and the round steel disc as the high-stress contact pair, and obtains the friction force change process of the contact pair from time to time through the tension and pressure sensor, which improves the accuracy and repeatability of the measurement data , the translation plate can move along the front and back of the table to adjust the radius of gyration, which has good practicability, and the loading and gyrating device can precisely control the magnitude of the loading force according to the needs, so as to ensure the accuracy of the measurement results, and at the same time improve the operational flexibility of the equipment. Its main structure Simple, ingenious design concept, accurate measurement results, simple and convenient operation, scientific principle, convenient and flexible use, strong practicability, good application environment, and broad market prospects.

Description of drawings:

Fig. 1 is a schematic diagram of the principle of the main structure of the present invention.

FIG. 2 is a schematic diagram of the principle structure of the main body of the disk driving device involved in the present invention.

Fig. 3 is a schematic diagram of the main structure of the steel ball fixing device involved in the present invention.

Fig. 4 is a schematic diagram of the main structure of the sensor fixing and adjusting device involved in the present invention.

Fig. 5 is a schematic diagram of the principle structure of the main body of the loading and turning device involved in the present invention.

Fig. 6 is a schematic diagram of the longitudinal section structure of the bearing seat involved in the present invention.

Fig. 7 is a schematic diagram of the principle of the main structure of the translation device involved in the present invention.

detailed description:

The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings.

Example:

The main structure of the analog measurement device for the high-stress contact lubricating oil film friction force involved in this embodiment includes: a support platform 1, a disk drive device 2, a steel ball fixing device 3, a sensor fixing and adjusting device 4, a loading and rotating device 5 and translation device 6; the support platform 1 is a four-leg support structure at the bottom, and the upper ends of the four support feet are respectively fixedly connected to the four corners of the table top 61; the disc drive device 2 is fixedly placed on the upper surface of the support platform 1 near the front edge , its main structure includes: round steel disc 21, fixing device 22, driven pulley 23, driven shaft 24, disc drive motor support 25, disc drive motor 26, timing pulley 27, fixed disc 28 and sleeve 29 The round steel disc 21 is fixedly placed on the upper end of the driven shaft 24, and the upper end of the round steel disc 21 is equipped with a circular fixture 22 for fixing the round steel disc 21, and the lower end of the driven shaft 24 passes through the translation device 6, and the lower end of the driven shaft 24 is fixed with a driven pulley 23, which is used to transmit the power of the synchronous pulley 27 to drive the driven shaft 24 to rotate, and the lower end of the driven shaft 24 is close to the driven belt The upper side of the wheel 23 is movable with a cylindrical hollow sleeve 29, and the upper end of the sleeve 29 is fixedly connected with a fixed disk 28. The driven shaft 24 can freely rotate around the chamber in the middle of the sleeve 29, and the fixed disk 28 There are bolt holes at corresponding positions on the periphery of the fixed through hole 68, for fixing the fixed disk 28 on the table top 61 and for fixing the disk drive device 2; the disk drive motor support 25 of the I-shaped structure is fixed on the table 61 at the rear of the right edge, the notch of the disk drive motor support 25 faces inward, and a disk drive motor 26 for providing power is fixed in the notch, and the output shaft of the disk drive motor 26 passes through the disk drive The lower side plate of the motor support 25 is connected with the synchronous pulley 27 to drive the synchronous pulley 27 to rotate.

The steel ball fixing device 3 is located on the upper side of the round steel plate 21, and its main structure includes: a steel ball support 31, a steel ball sleeve 32, a tension wire nut 33 and a steel ball 34; the steel ball support 31 is a circle Rod-shaped structure, its upper end is connected with the outer end of the loading plate 51 in the loading rotary device 5, in order to transfer the force loaded by the loading rotary device 5 to the steel ball support 31, and the lower end of the steel ball support 31 is screwed to the cylindrical The steel ball sleeve 32 has two tension wire nuts 33 disposed on the outer surface of the steel ball sleeve 32, and the angle between the two tension wire nuts 33 on the steel ball sleeve 32 is 180° Be connected with the pressure sensor 45 in the sensor fixing and adjusting device 4 through the tension wire; the lower end of the steel ball sleeve 32 is covered with a steel ball 34, and the lower end of the steel ball 34 is in contact with the round steel disc 21 as a high-stress contact pair, and observe the change process of the friction force of the contact pair through the pressure sensor 45.

The sensor fixing and adjusting device 4 is located at the front of the left and right edges of the translation platform 64, and its main structure includes: a one-dimensional translation platform 41, a support foot 42, a support screw 43, a sensor connecting plate 44 and a tension and pressure sensor 45; The one-dimensional translation platform 41 is movably connected with the translation platform 64, and can only move left and right along the translation platform 64. The upper surface of the one-dimensional translation platform 41 is fixedly equipped with the support pin 42 of the L-shaped structure, and the support pin 42 The middle part of the upper side is connected with the lower end of the support screw 43. The sensor connection plate 44 is an L-shaped bent plate structure, the lower end is a vertical flat plate structure, and the upper end is a short horizontal plate structure bent outward. The outer side of the flat plate structure is close to the inner side of the support pin 42, and a tension pressure sensor 45 is fixed in the middle of the inner side of the vertical flat structure, and the tension pressure sensor 45 is connected with the tension line nut 33 through a tension line, The upper side of the support screw 43 is connected to the short horizontal plate structure of the sensor connection plate 44 , and the height of the sensor connection plate 44 is adjusted by adjusting the support screw 43 , and the height of the pressure sensor 45 is further adjusted.

The loading and turning device 5 is fixedly placed in the middle of the rear edge of the translation platform 64, and its main structure includes: a loading plate 51, a spring adjustment nut 52, a spring 53, a spring seat 54, a supporting side plate 55, thrust shafts 56, 57, Bearing pedestal 58 and thrust ball bearing 59; the bearing pedestal 58 of hollow cylindrical structure is fixedly placed on the translation platform 64, and a thrust ball bearing 59 is disposed in the middle cavity thereof, and the thrust ball bearing 59 is connected with the lower end bearing of the thrust shaft 56, The thrust shaft 56 can rotate freely in the horizontal direction around the thrust ball bearing 59. The upper side of the thrust shaft 56 is a cuboid plate structure, and the middle of the thrust shaft 56 is connected with the spring seat 54 of the flat structure. The upper end of 56 is rotationally connected with one end of the supporting side plate 55, and the supporting side plate 55 can rotate up and down around the thrust shaft 56; the other end of the supporting side plate 55 is connected with one end of the loading plate 51, and the other end of the loading plate 51 One end is connected with the steel ball support 31 to load the steel ball fixing device 3; the upper side of the spring seat 54 is fixed with a spring adjustment nut 52, and the upper end of the spring adjustment nut 52 is provided with a spring 53, and the upper end of the spring It is connected with the bottom of one end of the loading plate 51 close to the supporting side plate 55 , and is used to control the loading force of the loading plate 51 by adjusting the spring adjusting nut 52 .

The translation device 6 includes: a table top 61, a slide block 62, a guide rail 63, a translation plate 64, a threaded front seat 65, a threaded rear seat 66, a translation screw 67 and a fixing through hole 68; hole 68, the upper side of the table top 61 is provided with a translation plate 64, the lower surface of the translation plate 64 is provided with a threaded front seat 65, and the upper surface of the table top 61 is provided with a threaded rear seat 66, the threaded front seat 65 and the threaded back seat The seat 66 is connected by a translation screw 67, and the rotation of the translation screw 67 can realize the horizontal movement of the translation plate 64. The upper surface of the table top 61 is equipped with a linear guide rail 63 and a slider 62 structure extending along the front and rear direction of the table top 61. The structure of the translation plate 64 The lower surface is provided with a groove matching the guide rail 63 and the slider 62. The slider 62 can slide in the groove to reduce the frictional resistance during the movement of the translation plate 64, and the translation plate 64 moves forward and backward to drive The steel ball fixing device 3 , the sensor fixing and adjusting device 4 and the loading turning device 5 move back and forth to adjust the radius of gyration of the round steel disc 21 .

In this embodiment, when measuring the frictional force of high-stress contact lubricating oil film, the specific measurement steps are as follows:

(1) Adjustment of turning radius and loading force:

First adjust the translation screw 67 to adjust the front and rear positions of the translation plate 64, adjust the radius of gyration of the steel ball 34 by moving the position of the table top 61, adjust the spring adjustment nut 52 according to the required loading force, and then place the weight corresponding to the weight Place it on the loading plate 51 for accurate loading;

(2) Adjustment of the position of the pull pressure sensor:

First adjust the support screw 43 to adjust the height of the sensor connection plate 44, so that the tension and pressure sensor 45 reaches the required height. After the adjustment, fix the support screw 43, and then move the one-dimensional translation platform 41 to adjust the required tension. , fix the one-dimensional translation stage 41 after the adjustment is completed;

(3) Acquisition of friction force:

Start the disc drive motor 26, the disc drive motor 26 drives the driven pulley 23 to rotate through the synchronous pulley 27, and transmits power to the driven shaft 24 to drive the round steel disc 21 to rotate, and the round steel disc 21 and the steel ball 34 form a high Stress contact pair, two pull-pressure sensors 45 are connected to the loading plate 51 through tension lines in a pair-pull manner, and the two pull-pressure sensors 45 are connected to the translation platform 64, and the tension lines are tensioned by moving the translation platform 64, and the loading plate 51 can freely rotate around the loading rotary device 5 without being tightly constrained by the two tension and pressure sensors 45; and when the loading plate 51 is pulled and constrained by the two tension and pressure sensors 45, the friction of the contact pair of the loading plate 51 Under the action of force, there will be a turning trend, which is transmitted to the tension and pressure sensor 45, and then the friction force is obtained;

(4) On-line measurement and storage of friction force:

The frictional force between the round steel disc 21 and the steel ball 34 is measured by the pull pressure sensor 45, captured by the data acquisition card USB5935 and transmitted to the PC end, the analog signal is converted into a digital signal by the PC end, and the data acquisition is performed by calling the dynamic link library. LabVIEW is used for program design to realize the combination of LabVIEW and ordinary data acquisition card USB5935, and then realize signal acquisition, processing and data storage, directly read the friction force through the acquisition interface, and complete the online measurement and storage of friction force;

(5) Calibration of measuring equipment:

The system error in the measurement process can be calibrated by using two tension and pressure sensors 45 to pull. Since the rotation of the loading plate 51 needs to be supported by the thrust ball bearing 59, if the steel ball (roller) produces movement or movement tendency , must overcome the rolling friction of the thrust ball bearing 59 itself. In order to ensure the accuracy of the friction force measurement, the friction torque in the thrust ball bearing 59 must be calibrated. The sensor-to-pull experiment designed by Chen Jun et al. The measured value is corrected, assuming that the frictional moment hindering the movement of the steel ball 34 is M, and the two tension and pressure sensors 45 are respectively named sensor 1 and sensor 2 to distinguish them. When the sensor 1 is fixed and the sensor 2 moves at a constant speed, the sensor 1 gets the tension value F ₁ , sensor 2 gets F ₂ , there are:

F ₂ X ₂ =F ₁ X ₁ +M (1)

In the above formula then there is

F ₂ ＝b+F ₁ k (2)

Among them, X ₁ and X ₂ represent the distances from sensor 1 and sensor 2 to the center of gyration respectively. It should be noted that although the ball-disk did not contact in the pull experiment, F ₂ in the experiment can be equivalent to The actual friction force applied by the lubricating oil film to the steel ball after the ball-disk contact, therefore, in order to eliminate the influence of the friction torque in the bearing, this embodiment only needs to read the value _of the sensor F1, and the actual friction force applied by the lubricating oil film to the steel ball The force F ₂ is calculated by the fitting formula.

Claims (4)

1. a kind of analogue measurement device of high stress contact lubricating oil oil film frictional force, it is characterised in that its agent structure includes： Support platform, disk drive device, steel ball fixing device, sensor is fixed and adjusting means, loading slewing equipment peace move dress Put；Support platform is that bottom is four foot-supporting structures, and the upper end of four support feets is fixedly connected with the corner of table top respectively；Institute State disk drive device and fix and be placed in support platform upper surface and include close to preceding edge, its agent structure：Round steel disk, fixed dress Put, driven pulley, driven shaft, disk drive motor support base, disk drives motor, synchronous pulley, fixed disk and sleeve；Round steel disk is fixed and is placed in The upper end of driven shaft, the upper end of the round steel disk are equipped with to the circular fixing device of fixed round steel disk, under the driven shaft End is through the fixed via on translating device, and driven shaft lower end is fixedly equipped with driven pulley, to transmit synchronous pulley For power to drive driven shaft to rotate, the upside that driven pulley is pressed close in the lower end of driven shaft movable is cased with cylindricality cannulated sleeve, set Cylinder upper end be fixedly connected with fixed disk, the driven shaft can freely rotate around the chamber among sleeve, the fixed disk with consolidate The circumference edge correspondence position for determining through hole is provided with bolt hole, fixed disk is fixed on table top and to fixed disc Drive device；The right edge that the disk drive motor support base of work shape structure is fixed on table top is located rearward, and the disk drives the groove of motor support base Mouthful inwardly, and in notch the disk for being fixedly equipped with to provide power drives motor, and the disk drives the output shaft of motor through disk drive The lower side panel of motor support base is connected with synchronous pulley, to drive synchronous pulley to rotate；The steel ball fixing device is located at round steel The upside of disk, its agent structure include：Steel ball bearing, steel ball sleeve, tensioning line nut and steel ball；Steel ball bearing is round bar shape knot Structure, its upper end are connected with the outer end of the load plate in loading slewing equipment, the power for loading slewing equipment loading to be transferred to Steel ball bearing, the lower end of steel ball bearing are threadedly coupled cylindric steel ball sleeve, and the top place of lateral surface of steel ball sleeve is equipped with two Line nut is tensioned, the angles between two tensioning line nuts on the steel ball sleeve are 180 °；By being tensioned line and sensor Pressure sensor connection in fixed and adjusting means；The lower end of the steel ball sleeve is cased with steel ball, the lower end of steel ball and round steel Disk contact is used as high stress Contact Pair, and observes Contact Pair change in friction force process by pressure sensor；The sensing Device is fixed and adjusting means is located at translation stage or so edge front, and its agent structure includes：One-dimensional translation stage, branch seat leg, branch Support screw, sensor connecting plate and pull pressure sensor；The upper surface of the one-dimensional translation stage is fixedly equipped with the bearing of L-type structure Pin, the upside middle of branch seat leg and the lower end of supporting screw connect, and the sensor connecting plate is that L-type bends harden structure, under It is the hyphen harden structure bent laterally to hold as two vertical plates structure, upper end, is close to closely prop up on the outside of the two vertical plates structure The inner side of seat leg, the inner side middle of the two vertical plates structure are fixedly equipped with pull pressure sensor, the pull pressure sensor It is connected by being tensioned line with tensioning line nut, the upside of the supporting screw is connected with the hyphen harden structure of sensor connecting plate, The height of sensor connecting plate is adjusted by adjusting supporting screw, further adjusts the height of pressure sensor；The loading Slewing equipment fixes the back edge middle for being placed in translation stage, and its agent structure includes：Load plate, spring adjusting nut, spring, Spring base, support side plate, thrust axis, bearing block and thrust ball bearing；The bearing block of hollow cylinder structure is fixed and is placed in translation stage On, thrust ball bearing is equipped with in-between cavity, the bottom end bearing connection of the thrust ball bearing and thrust axis, thrust axis can Freely being rotated in the horizontal direction around thrust ball bearing, the upside of the thrust axis is cuboid platy structure, and thrust axis The spring base of middle and plate-like structure connects, and the upper end of the thrust axis and one end rotary type of support side plate connect, branch Support side plate can rotate upwardly and downwardly around thrust axis；The other end of the support side plate and one end of load plate connect, the load plate The other end be connected with steel ball bearing, to be loaded to steel ball fixing device；Bullet is fixedly equipped with the upside of the spring base Spring adjusting nut, the upper end of spring adjusting nut are equipped with spring, and the upper end of spring and load plate are close to one end of support side plate Bottom connects, to by adjusting spring adjusting nut come the size of controlled loading plate institute loading force；The translating device includes： Table top, sliding block, guide rail, translation plates, screw thread front stall, screw thread back seat, translation screw rod and fixed via；The close preceding edge of table top Fixed via is provided with, translation plates are equipped with the upside of table top, screw thread front stall is equipped with the lower surface of the translation plates, the table top Screw thread back seat is equipped with upper surface, screw thread front stall connects with screw thread back seat by translating screw rod, and translation screw rod rotation can be realized Translation plates move horizontally, and the upper surface of table top is equipped with the line slideway and slide block structure that extend along table top fore-and-aft direction, described The lower surface of translation plates is provided with the groove with guide rail and sliding block cooperation, and the slip that sliding block can be in the trench is flat to reduce The frictional resistance moved in plate moving process, and moved forward and backward by translation plates drive steel ball fixing device, sensor fix and Adjusting means and loading slewing equipment move forward and backward, to adjust the radius of gyration of round steel disk.

2. the analogue measurement device of high stress contact lubricating oil oil film frictional force according to claim 1, it is characterised in that One-dimensional translation stage and the movable connection of translation stage, and be merely able to move left and right along translation stage.

3. the analogue measurement device of high stress contact lubricating oil oil film frictional force according to claim 1, it is characterised in that The angle between two tensioning line nuts on steel ball sleeve is 180 °.

4. the analogue measurement device of high stress contact lubricating oil oil film frictional force according to claim 1, it is characterised in that Specific measuring method is carried out in accordance with the following steps：

(1) adjustment of the radius of gyration and loading force：

First adjustment translates screw rod to adjust the front and back position of translation plates, and the revolution of steel ball half is adjusted by the movement of table position Footpath, spring adjusting nut is adjusted according to the size of required loading force, then the counterweight of corresponding weight is placed in load plate and carried out Accurate loading；

(2) adjustment of pull pressure sensor position：

Supporting screw is first adjusted to adjust the height of sensor connecting plate, pull pressure sensor is reached required height, is adjusted Supporting screw is fixed after whole, then moves one-dimensional translation stage to adjust the size of required tensile force, it is solid after adjustment Fixed one-dimensional translation stage；

(3) acquisition of frictional force：

Boot disk drives motor, and disk drives motor and drives driven pulley to rotate by synchronous pulley, power is transferred on driven shaft Drive round steel disk to rotate, round steel disk and steel ball collectively constitute high stress Contact Pair, two pull pressure sensor to the mode of drawing with Load plate is connected by being tensioned line, and two pull pressure sensor are connected on translation stage, and tensioning is tensed by mobile translation stage Line, load plate can freely turn round under conditions of two pull pressure sensor tight constraints are not affected by around loading slewing equipment；And When load plate by two pull pressure sensor to draw constrain after, load plate contact friction force effect under, it will produce back Gesture is transferred toward, the trend is delivered in pull pressure sensor, and then obtains frictional force；

(4) on-line measurement and storage of frictional force：

Round steel disk and steel ball frictional force are measured by pull pressure sensor, is captured by data collecting card USB and is transferred to PC ends, Data signal is converted analog signals into by PC ends, by calling dynamic link library, line program is entered to the LabVIEW of data acquisition Design, realizes LabVIEW and general data capture card USB combination, and then realizes the collection, processing and data storage of signal, Frictional force is directly read by acquisition interface, completes the on-line measurement and storage of frictional force；

(5) demarcation of measuring apparatus：

Drawing can be realized using two pull pressure sensor the systematic error in measurement process is demarcated, due to load plate Revolution need to realize by thrust ball bearing support, if make steel ball produce motion or movement tendency, it is necessary to overcome thrust axis The force of rolling friction of itself is held, in order to ensure the accuracy of friction measurement, it is necessary to calibrate the frictional force in thrust ball bearing Square, tested using the sensor of the designs such as Chen Jun to drawing, the numerical value measured by pull pressure sensor is modified, it is assumed that hinder The moment of friction of steel ball motion is M, and two pull pressure sensor are respectively designated as into sensor 1 and sensor 2 to make a distinction, When sensor 1 is fixed, during 2 uniform motion of sensor, sensor 1 obtains value of thrust F₁, sensor 2 obtains F₂, have：

F₂X₂=F₁X₁+M (1)

Make in above formulaThen have

F₂=b+F₁k (2)

Wherein, X₁、X₂Sensor 1 and sensor 2 are represented respectively to the distance of the centre of gyration, it is necessary to illustrate, although real to drawing Test ball-disk and not in contact with, but test in F₂Lubricating oil film is applied to steel ball after ball in friction Force system-disk contact can be equivalent to The actual frictional force added, therefore, in order to eliminate the influence of moment of friction in thrust ball bearing, only it need to read sensor F₁Number Value, lubricating oil film are applied to the actual frictional force F of steel ball₂Then it is calculated by fitting formula.