CN110274547B - Bidirectional speed point contact photoelastic flow test bed - Google Patents
Bidirectional speed point contact photoelastic flow test bed Download PDFInfo
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- CN110274547B CN110274547B CN201910648573.8A CN201910648573A CN110274547B CN 110274547 B CN110274547 B CN 110274547B CN 201910648573 A CN201910648573 A CN 201910648573A CN 110274547 B CN110274547 B CN 110274547B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2441—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures using interferometry
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Abstract
The invention belongs to the technical field of optical interference test equipment, and particularly relates to a bidirectional speed point contact photoelastic test bed, which comprises a main body structure, a guide rail, a ball box, a servo motor, a coupler, a small ball connecting rod, a ball support, a steel ball, a tension spring, a glass disc, a threaded pressing plate, a bearing, a main shaft, a vibration exciter connecting rod, a vibration exciter shaft sleeve and a vibration exciter threaded support, wherein when the bidirectional speed point contact photoelastic test bed is used, the main body structure is respectively connected with a camera, a microscope, a signal generator, a computer and 2 vibration exciters, the vibration exciters respectively drive the steel ball to reciprocate and the glass disc to rotate, the microscope and the camera which are arranged on a support are used for recording an oil film image of a contact area between the steel ball and the glass disc in a test process and storing the oil film image into the computer, the first servo motor controls the rotating speed of the, and the computer controls the initial load of the vibration exciter in the test process.
Description
The technical field is as follows:
the invention belongs to the technical field of optical interference test equipment, and particularly relates to a bidirectional speed point contact photoelastic flow test bed which is matched with a vibration exciter, a signal generator and a computer to carry out an optical interference test.
Background art:
the optical interference method is a physical method designed by using the optical interference principle, and the main technical means is various interferometers. The light interference is the phenomenon that the light intensity distribution generated when a plurality of light waves (member waves) meet is not equal to the sum of the light intensity distributions caused by the member waves independently, and the light and the shade are alternated. The interference phenomenon is usually expressed as that the light intensity is distributed in a rather stable light and dark alternate fringe in space; sometimes it appears that the intensity of light received at a fixed point varies in a regular manner when a certain parameter of the interference device changes over time. The interference can be divided into dual-wave interference and multi-wave interference. When the member waves are not polarized in the same direction at the observation point, interference of polarized light occurs. The method can be widely applied to the fields of precision measurement, astronomical observation, photoelastic stress analysis, automatic control in optical precision machining and the like. The optical interference method is one of the most effective methods for measuring the thickness of the lubricating oil film, the shape and distribution of the thickness of the oil film in a contact area are reflected by the light intensity and color of an interference image, and the important measures for saving energy and raw materials and shortening the maintenance time are realized by controlling friction, reducing abrasion and improving the lubricating performance. The method for controlling friction and wear is usually from the representation of tests, along with the development of tribology, the working conditions of test research become more and more complex, and the existing one-way speed point contact test bed can not meet the requirements of tests, for example: the heavy-load photoelastic flow oil film measuring device disclosed in Chinese patent 201010198089.9 comprises three parts: the motion mechanism comprises a servo motor, a belt wheel, a lead screw, a sliding block and a transparent material, wherein the servo motor is a power source, the lead screw is driven by the belt wheel and is fixed on the sliding block, the sliding block is driven by the lead screw to linearly slide on a guide rail, the transparent material is arranged in the sliding block, the lower surface of the transparent material is pressed on a tested piece and forms a pair of contact bodies with the tested piece, and the exposed width of the transparent material is slightly larger than the length of a roller; the supporting mechanism comprises a pair of fixed rollers and a pair of floating rollers, the tested piece is supported by the pair of floating rollers, and the pair of floating rollers are supported by the pair of fixed rollers and the loading roller, and the fixed rollers and the loading roller are respectively provided with a rolling bearing, so that pure rolling can be realized; the loading mechanism comprises a load weight and a loading roller at the other end, the load weight is amplified through a lever mechanism and then acts on the tested piece through the loading roller, and a rolling bearing is arranged on the loading roller; an incident cold light source irradiates the test piece through a narrow-band filter by a microscope, and an interference image is amplified by the microscope and transmitted to a computer for processing by a CCD (charge coupled device); chinese patent 201610850701.3 discloses a high-speed heavy-duty roller photoelastic flow oil film measuring device includes motion, loading mechanism, strutting arrangement and image acquisition processing system, motion includes speed regulating motor, first shaft coupling, reduction gear, second shaft coupling, rolling disc, axle sleeve and transparent material, speed regulating motor passes through first shaft coupling with the reduction gear links to each other, the reduction gear passes through second shaft coupling with the rolling disc links to each other, the rolling disc is connected the axle sleeve, transparent material have stretch out the end and with the corresponding end of inserting of end stretches out, insert the end and insert and locate in the axle sleeve, stretch out the end expose in the axle sleeve, the rolling disc drives the axle sleeve, the axle sleeve drives transparent material makes rotary motion, loading mechanism includes portable support, lever, cylinder, pressure sensor, The device comprises a floating roller, a measured roller and an air cylinder control system, wherein the air cylinder control system is electrically connected with an air cylinder, one end of a lever is connected with the floating roller, the other end of the lever is connected with the air cylinder, the movable support is sleeved in the middle of the lever, the floating roller is in contact with the measured roller, the measured roller is arranged below the floating roller, the support device comprises an even number of support wheels, the even number of support wheels are symmetrically distributed on two sides of the extending end of the transparent material, the image acquisition processing system comprises an image acquisition device and an image processing system, the image acquisition device is arranged on the outer side of the transparent material, the image acquisition device is aligned with the measured roller, and the image acquisition device is electrically connected with the image processing system; chinese patent 201811155691.7 discloses a ring formula photoelastic flow oil film measurement testing machine, include the base and install the bearing frame on the base, the base on be equipped with actuating mechanism, loading mechanism and image acquisition processing system, actuating mechanism: the device comprises a transmission main shaft supported by a bearing seat, wherein the front end of the transmission main shaft is connected with a sleeve, the inner ring of the sleeve is fixedly connected with a glass ring, and a roller to be detected is placed at the bottom of the inner ring of the glass ring; a loading mechanism: the device comprises a front lever and a rear lever, wherein the front lever is arranged parallel to the axis of a transmission main shaft, the rear lever is perpendicular to the front lever and is not in the same plane with the front lever, the front end of the front lever is provided with a loading head with a floating roller, the floating roller vertically presses a measured roller to form an oil film contact area, the front end of the rear lever presses the rear end of the front lever, and a pressing weight is hung at the rear end of the rear lever; the image acquisition processing system comprises: the microscope is provided with a high-speed camera which shoots an oil film interference pattern formed by the oil film contact area and transmits the oil film interference pattern to the computer. Therefore, a point contact photoelastic flow test bed with a bidirectional speed is sought to be designed, and good economic benefits and social benefits are achieved.
The invention content is as follows:
the invention aims to overcome the defects in the prior art and develops a bidirectional speed point contact photoelastic flow test bed which is matched with a vibration exciter, a signal generator and a computer to carry out bidirectional speed point contact photoelastic flow tests.
In order to achieve the purpose, the main structure of the bidirectional speed point contact photoelastic test bed comprises a base, a guide rail, a motor mounting seat, a ball box, a servo motor I, a shaft coupling I, a small ball connecting rod, a ball support, a steel ball, a tension spring, a main shaft mounting plate, a connecting assembly, a motor supporting seat, a shaft coupling II, a servo motor II, a main shaft bearing seat, a bearing mounting piece, a glass disc, a threaded pressing plate, a bearing, a main shaft, a vibration exciter connecting rod I, a vibration exciter connecting rod II, a vibration exciter shaft sleeve and a vibration exciter threaded support; the table-type structure is characterized in that a guide rail is arranged on the table top of a base of the table-type structure, a motor mounting seat of an L-shaped plate-shaped structure consisting of a transverse plate and a longitudinal plate and a ball box are arranged in the guide rail, a first servo motor penetrates through the longitudinal plate of the motor mounting seat and then is rotatably connected with a small ball connecting rod through a first coupler, the small ball connecting rod is connected with a steel ball fixed in the ball box by a ball support, and the ball box is connected with a tension spring fixedly arranged on the table top of the base; the spindle mounting plate is arranged between two table legs of the base through a connecting assembly, the lower surface of the spindle mounting plate is connected with a motor supporting seat of a U-shaped structure, a second coupler is arranged in a U-shaped groove of the motor supporting seat, a second servo motor is arranged below the motor supporting seat and connected with the second servo motor, a main bearing carrier seat of an inner hollow structure is arranged on the upper surface of the spindle mounting plate, a bearing mounting part is arranged at the top of the spindle carrier seat, a glass disc is arranged at the top of the bearing mounting part and contacted with a steel ball, a threaded pressing plate is arranged at the top of the glass disc, a bearing is arranged on the threaded pressing plate and connected with the bearing mounting part through the threaded pressing plate, the spindle is arranged in the spindle carrier seat, the bottom end of the spindle is connected with the second coupler; a vibration exciter connecting rod and a second vibration exciter connecting rod are arranged under the table board of the base, one end of the first vibration exciter connecting rod penetrates through the table board of the base to be in contact with the ball box, one end of the second vibration exciter connecting rod is in contact with the main shaft mounting plate, and the other ends of the first vibration exciter connecting rod and the second vibration exciter connecting rod are provided with vibration exciter shaft sleeves and vibration exciter thread supports.
The table top of the base related to the invention is also provided with a bracket; a longitudinal plate of the motor mounting seat is in threaded connection with a first servo motor; a lower rubber gasket and a lower gasket are arranged between the bearing mounting piece and the glass disc from top to bottom, and an upper gasket and an upper rubber gasket are arranged between the glass disc and the threaded pressing plate from top to bottom.
The guide rail related to the invention is arranged on the central line of the base; the elastic force of the extension spring enables the ball box to return to the initial position; the main shaft mounting plate is respectively connected with the motor supporting seat and the main bearing load seat in a bolt manner; the main shaft bearing seat is in bolted connection with a bearing mounting part, the main bearing seat is used for fixing the main shaft, and the bearing mounting part is used for fixing the bearing; the number of the bearings is 8, and the bearings are arranged on the circumference of the threaded pressing plate at equal intervals.
The bracket is used for mounting a microscope and a camera; the bottoms of the motor mounting seat and the ball box are both in a dovetail groove structure and can horizontally move in the guide rail along the dovetail groove direction; the threaded pressure plate, the lower rubber gasket, the lower gasket, the upper gasket and the upper rubber gasket fix the glass disc on the spindle and protect the glass disc.
The invention relates to a bidirectional speed point contact photoelastic test bed which is connected with a camera, a microscope, a signal generator, a computer and 2 vibration exciters respectively when in use, wherein the signal generator generates continuous signals with set frequency, the signals are input into the vibration exciters after being amplified by a power amplifier, a moving coil of each vibration exciter generates exciting force under the action of variable frequency current, the exciting force sent by one vibration exciter is transmitted and loaded to a ball box through a vibration exciter thread support, a vibration exciter shaft sleeve and a vibration exciter connecting rod, the ball box transversely vibrates according to the set frequency and distance, the ball box drives a steel ball with tangential speed to carry out axial reciprocating vibration, meanwhile, a motor mounting seat fixes a servo motor and drives the servo motor to horizontally move in a guide rail, and the servo motor drives the steel ball to rotate through a coupler and a small ball connecting rod; the exciting force of the other vibration exciter is transmitted and loaded to a contact area between the steel ball and the glass disc through a vibration exciter thread support, a vibration exciter shaft sleeve, a second vibration exciter connecting rod, a main shaft mounting plate and a main shaft, and meanwhile, a second servo motor transmits torque to the main shaft through a second coupler so as to drive the glass disc to rotate; and observing and recording the change of the oil film in the test process by a microscope and a camera right above the contact area of the steel ball and the glass disc, acquiring a light interference pattern of the oil film, and controlling the exciting force of the vibration exciter by a computer.
The first servo motor can control the rotating speed of the steel ball; the second servo motor can control the rotating speed of the glass disc; the vibration exciter can control the axial reciprocating distance of the steel ball; the signal generator module is a 4-channel waveform generator, the resolution is 12 bits, the frequency is 0.1-100kHz, the waveform duty ratio is 0-100%, and the frequency of the reciprocating motion of the steel ball is adjusted by controlling the frequency.
Compared with the prior art, the steel ball testing device is respectively connected with a camera, a microscope, a signal generator, a computer and 2 vibration exciters when in use, the vibration exciters respectively drive the steel ball to reciprocate and the glass disc to rotate, the microscope and the camera arranged on the support are used for recording an oil film image of a contact area of the steel ball and the glass disc in a testing process and storing the oil film image into the computer, the first servo motor controls the rotating speed of the steel ball, the second servo motor controls the rotating speed of the glass disc, the vibration exciters control the axial reciprocating distance of the steel ball, the signal generator controls the axial reciprocating frequency of the steel ball, and the computer controls the initial load of the vibration exciters in the testing; the device has the advantages of reasonable structure, high test precision, accurate measurement, long service life and environment-friendly application.
Description of the drawings:
fig. 1 is a schematic diagram of the principle of the main structure of the present invention.
Fig. 2 is a top view of the main structure of the present invention.
Fig. 3 is a side view of the main structure of the present invention.
The specific implementation mode is as follows:
the present invention will be described in further detail by way of examples with reference to the accompanying drawings.
Example 1:
the main structure of the bidirectional speed point contact photoelastic flow test bed related to the embodiment comprises
The vibration exciter comprises a base 1, a guide rail 2, a support 3, a motor mounting seat 4, a ball box 5, a first servo motor 6, a first coupler 7, a small ball connecting rod 8, a ball support 9, a steel ball 10, an extension spring 11, a main shaft mounting plate 12, a connecting assembly 13, a motor supporting seat 14, a second coupler 15, a second servo motor 16, a main bearing loading seat 17, a bearing mounting part 18, a glass disc 19, a threaded pressing plate 20, a bearing 21, a lower rubber gasket 22, a lower gasket 23, an upper gasket 24, an upper rubber gasket 25, a main shaft 26, a first vibration exciter connecting rod 27, a second vibration exciter connecting rod 28, a vibration exciter shaft sleeve 29 and a vibration exciter threaded support 30; a guide rail 2 and a support 3 are arranged on the table top of a base 1 of a table structure, a motor mounting seat 4 of an L-shaped plate-shaped structure consisting of a transverse plate and a longitudinal plate and a ball box 5 are arranged in the guide rail 2, the longitudinal plate of the motor mounting seat 4 is in threaded connection with a servo motor 6, the servo motor 6 penetrates through the longitudinal plate of the motor mounting seat 4 and then is in rotary connection with a small ball connecting rod 8 through a coupler 7, the small ball connecting rod 8 is connected with a steel ball 10 fixed in the ball box 5 by a ball support 9, and the ball box 5 is connected with a tension spring 11 fixedly arranged on the table top of the base 1; the main shaft mounting plate 12 is arranged between two table legs of the base 1 through a connecting component 13, the lower surface of the main shaft mounting plate 12 is connected with a motor supporting seat 14 with a U-shaped structure, a second coupler 15 is arranged in a U-shaped groove of the motor supporting seat 14, a second servo motor 16 is arranged below the motor supporting seat 14, the second coupler 15 is connected with the second servo motor 16, a main bearing carrier seat 17 with an inner hollow structure is arranged on the upper surface of the main shaft mounting plate 12, a bearing mounting part 18 is arranged at the top of the main bearing carrier seat 17, a glass disc 19 is arranged at the top of the bearing mounting part 18, the glass disc 19 is contacted with a steel ball 10, a threaded pressing plate 20 is arranged at the top of the glass disc 19, a bearing 21 is arranged on the threaded pressing plate 20, the bearing 21 penetrates through the threaded pressing plate 20 to be connected with the bearing mounting part 18, a lower, an upper gasket 24 and an upper rubber gasket 25 are arranged between the glass disc 19 and the threaded pressing plate 20 from top to bottom, a main shaft 26 is arranged in the main bearing carrier seat 17, the bottom end of the main shaft 26 is connected with the second coupler 15, and the top end of the main shaft 26 extends out of the threaded pressing plate 20; a first vibration exciter connecting rod 27 and a second vibration exciter connecting rod 28 are arranged below the table board of the base 1, one end of the first vibration exciter connecting rod 27 penetrates through the table board of the base 1 to be in contact with the ball box 5, one end of the second vibration exciter connecting rod 28 is in contact with the spindle mounting plate 12, and a vibration exciter shaft sleeve 29 and a vibration exciter thread support 30 are arranged at the other ends of the first vibration exciter connecting rod 27 and the second vibration exciter connecting rod 28.
The guide rail 2 according to the present embodiment is provided on the center line of the base 1; the bracket 3 is used for mounting a microscope and a camera; the bottoms of the motor mounting seat 4 and the ball box 5 are both in a dovetail groove structure and can horizontally move in the guide rail 2 along the dovetail groove direction; the elastic force of the extension spring 11 returns the ball box 5 to the initial position; the main shaft mounting plate 12 is respectively connected with a motor supporting seat 14 and a main bearing carrier seat 17 in a bolt manner; the main bearing carrier seat 17 is connected with a bearing mounting piece 18 in a bolt mode, the main bearing carrier seat 17 is used for fixing the main shaft 26, and the bearing mounting piece 18 is used for fixing the bearing 21; the threaded pressure plate 20, the lower rubber gasket 22, the lower gasket 23, the upper gasket 24 and the upper rubber gasket 25 fix the glass disk 19 on the spindle 26 and protect the glass disk 19; the number of the bearings 21 is 8, and the bearings are arranged on the circumference of the screw thread pressing plate 20 at equal intervals.
When the bidirectional speed point contact photoelastic test bed related to the embodiment is used, the test bed is respectively connected with a camera, a microscope, a signal generator, a computer and 2 vibration exciters, the signal generator generates continuous signals with set frequency, the signals are input into the vibration exciters after being amplified by a power amplifier, a moving coil of each vibration exciter generates exciting force under the action of variable frequency current, the exciting force sent by one vibration exciter is transmitted and loaded to a ball box 5 through a vibration exciter thread support 30, a vibration exciter shaft sleeve 30 and a vibration exciter connecting rod 27, the ball box 5 performs transverse vibration according to the set frequency and distance, the ball box 5 drives a steel ball 10 with tangential speed to perform axial reciprocating vibration, meanwhile, the motor mounting seat 4 fixes the first servo motor 6 and drives the first servo motor 6 to horizontally move in the guide rail 2, and the first servo motor 6 drives the steel ball 10 to rotate through the first coupler 7 and the small ball connecting rod 8; the exciting force of the other vibration exciter is transmitted and loaded to a contact area between the steel ball 10 and the glass disc 19 through a vibration exciter thread support 30, a vibration exciter shaft sleeve 30, a second vibration exciter connecting rod 28, a main shaft mounting plate 12 and a main shaft 26, and meanwhile, a second servo motor 16 transmits torque to the main shaft 26 through a second coupler 15, so that the glass disc 19 is driven to rotate; and observing and recording the change of the oil film in the test process by a microscope and a camera right above the contact area of the steel ball 10 and the glass disc 19, acquiring a light interference pattern of the oil film, and controlling the exciting force of a vibration exciter by a computer.
The first servo motor 6 related to the embodiment can control the rotating speed of the steel ball 10; the second servo motor 16 can control the rotating speed of the glass disc 19; the vibration exciter can control the axial reciprocating distance of the steel ball 10; the signal generator module is a 4-channel waveform generator, the resolution is 12 bits, the frequency is 0.1-100kHz, the waveform duty ratio is 0-100%, and the reciprocating frequency of the steel ball 10 is adjusted by controlling the frequency.
Claims (7)
1. A bidirectional speed point contact photoelastic test bed is characterized in that a main body structure comprises a base, a guide rail, a motor mounting seat, a ball box, a first servo motor, a first coupler, a small ball connecting rod, a ball support, a steel ball, a tension spring, a main shaft mounting plate, a connecting assembly, a motor supporting seat, a second coupler, a second servo motor, a main shaft bearing seat, a bearing mounting piece, a glass disc, a threaded pressing plate, a bearing, a main shaft, a first vibration exciter connecting rod, a second vibration exciter connecting rod, a vibration exciter shaft sleeve and a vibration exciter threaded support; the table-type structure is characterized in that a guide rail is arranged on the table top of a base of the table-type structure, a motor mounting seat of an L-shaped plate-shaped structure consisting of a transverse plate and a longitudinal plate and a ball box are arranged in the guide rail, a first servo motor penetrates through the longitudinal plate of the motor mounting seat and then is rotatably connected with a small ball connecting rod through a first coupler, the small ball connecting rod is connected with a steel ball fixed in the ball box by a ball support, and the ball box is connected with a tension spring fixedly arranged on the table top of the base; the spindle mounting plate is arranged between two table legs of the base through a connecting assembly, the lower surface of the spindle mounting plate is connected with a motor supporting seat of a U-shaped structure, a second coupler is arranged in a U-shaped groove of the motor supporting seat, a second servo motor is arranged below the motor supporting seat and connected with the second servo motor, a main bearing carrier seat of an inner hollow structure is arranged on the upper surface of the spindle mounting plate, a bearing mounting part is arranged at the top of the spindle carrier seat, a glass disc is arranged at the top of the bearing mounting part and contacted with a steel ball, a threaded pressing plate is arranged at the top of the glass disc, a bearing is arranged on the threaded pressing plate and connected with the bearing mounting part through the threaded pressing plate, the spindle is arranged in the spindle carrier seat, the bottom end of the spindle is connected with the second coupler; a vibration exciter connecting rod and a second vibration exciter connecting rod are arranged under the table board of the base, one end of the first vibration exciter connecting rod penetrates through the table board of the base to be in contact with the ball box, one end of the second vibration exciter connecting rod is in contact with the main shaft mounting plate, and the other ends of the first vibration exciter connecting rod and the second vibration exciter connecting rod are provided with vibration exciter shaft sleeves and vibration exciter thread supports.
2. The bidirectional velocity point contact photoelastic flow test bed of claim 1, wherein a support is further provided on the table top of the base; a longitudinal plate of the motor mounting seat is in threaded connection with a first servo motor; a lower rubber gasket and a lower gasket are arranged between the bearing mounting piece and the glass disc from top to bottom, and an upper gasket and an upper rubber gasket are arranged between the glass disc and the threaded pressing plate from top to bottom.
3. The bi-directional velocity point contact photoelastic flow test stand of claim 1, wherein the guide rail is disposed on the centerline of the base; the elastic force of the extension spring enables the ball box to return to the initial position; the main shaft mounting plate is respectively connected with the motor supporting seat and the main bearing load seat in a bolt manner; the main shaft bearing seat is in bolted connection with a bearing mounting part, the main bearing seat is used for fixing the main shaft, and the bearing mounting part is used for fixing the bearing; the number of the bearings is 8, and the bearings are arranged on the circumference of the threaded pressing plate at equal intervals.
4. The bi-directional velocity point contact photoelastic flow test stand of claim 2, wherein the mount is used to mount a microscope and a camera.
5. The bidirectional velocity point contact photoelastic flow test bed of claim 2, wherein the bottom of the motor mounting seat and the ball box are both dovetail groove structures, and can move horizontally in a guide rail along the dovetail groove direction; the threaded pressure plate, the lower rubber gasket, the lower gasket, the upper gasket and the upper rubber gasket fix the glass disc on the spindle and protect the glass disc.
6. The bi-directional velocity point contact photoelastic flow test stand of claim 2, characterized in that in use, the signal generator generates continuous signals with set frequency, the signals are input into the vibration exciters after being amplified by the power amplifier, the moving coil of the vibration exciters generates exciting force under the action of variable frequency current, the exciting force generated by one vibration exciter is transmitted and loaded to the ball box through the vibration exciter thread support, the vibration exciter shaft sleeve and the first vibration exciter connecting rod, the ball box performs transverse vibration according to the set frequency and distance, the ball box drives the steel ball with tangential speed to perform axial reciprocating vibration, meanwhile, the motor mounting seat fixes the first servo motor and drives the first servo motor to horizontally move in the guide rail, and the first servo motor drives the steel ball to rotate through the first coupler and the small ball connecting rod; the exciting force of the other vibration exciter is transmitted and loaded to a contact area between the steel ball and the glass disc through a vibration exciter thread support, a vibration exciter shaft sleeve, a second vibration exciter connecting rod, a main shaft mounting plate and a main shaft, and meanwhile, a second servo motor transmits torque to the main shaft through a second coupler so as to drive the glass disc to rotate; and observing and recording the change of the oil film in the test process by a microscope and a camera right above the contact area of the steel ball and the glass disc, acquiring a light interference pattern of the oil film, and controlling the exciting force of the vibration exciter by a computer.
7. The point contact photoelastic flow test bed of claim 6, wherein a servo motor can control the rotation speed of the steel ball; the second servo motor can control the rotating speed of the glass disc; the vibration exciter can control the axial reciprocating distance of the steel ball; the signal generator module is a 4-channel waveform generator, the resolution is 12 bits, the frequency is 0.1-100kHz, the waveform duty ratio is 0-100%, and the frequency of the reciprocating motion of the steel ball is adjusted by controlling the frequency.
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| CN201910648573.8A CN110274547B (en) | 2019-07-18 | 2019-07-18 | Bidirectional speed point contact photoelastic flow test bed |
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| CN201910648573.8A CN110274547B (en) | 2019-07-18 | 2019-07-18 | Bidirectional speed point contact photoelastic flow test bed |
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| CN111006598B (en) * | 2019-12-06 | 2022-07-01 | 东华大学 | Variable-load optical elastic fluid dynamic lubrication test bed based on PLC control |
| CN111487153A (en) * | 2020-05-08 | 2020-08-04 | 东华大学 | Bidirectional variable-speed variable-load contact lubrication abrasion integrated tester |
| CN114413814A (en) * | 2021-12-13 | 2022-04-29 | 徐州中材装备重型机械有限公司 | Grate cooler clinker bed thickness measuring instrument |
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| JPH0526625A (en) * | 1991-07-18 | 1993-02-02 | Kawasaki Steel Corp | Oil film quantity measuring method and device |
| CN101852592A (en) * | 2010-06-10 | 2010-10-06 | 常州大学 | Heavy-duty optical elastohydrodynamic oil film measuring device |
| CN104613878B (en) * | 2015-01-05 | 2017-09-08 | 常州大学 | A kind of Novel wire contacts photoelastic stream experimental provision |
| CN104748692B (en) * | 2015-03-24 | 2017-08-25 | 上海大学 | Three rollers integrally load the photoelastic stream testing machine of needle roller |
| CN106323180A (en) * | 2016-09-26 | 2017-01-11 | 常州大学 | High-speed heavy-load roller optical elastic-hydrodynamic oil film measuring device |
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