CN215573762U - Linear contact rolling friction experimental device - Google Patents
Linear contact rolling friction experimental device Download PDFInfo
- Publication number
- CN215573762U CN215573762U CN202120997949.9U CN202120997949U CN215573762U CN 215573762 U CN215573762 U CN 215573762U CN 202120997949 U CN202120997949 U CN 202120997949U CN 215573762 U CN215573762 U CN 215573762U
- Authority
- CN
- China
- Prior art keywords
- photoelastic
- cylindrical roller
- disc sample
- rolling friction
- sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a linear contact rolling friction experiment device, which comprises a bearing table, a sample fixing seat, a photoelastic disc sample, a driving mechanism, a cylindrical roller, a weight loading mechanism and a camera, wherein the sample fixing seat, the photoelastic disc sample, the driving mechanism, the cylindrical roller, the weight loading mechanism and the camera are arranged on the bearing table; the cylindrical roller is positioned above the photoelastic disc sample, and when the photoelastic disc sample rotates, the cylindrical roller is driven to rotate through friction force, so that linear contact rolling friction is formed between the photoelastic disc sample and the cylindrical roller; the weight loading mechanism is used for applying load to the photoelastic disc sample, and the magnitude of the applied load is adjustable; the lens of the camera faces the contact between the photoelastic disc sample and the cylindrical roller. The rotating photoelastic disc sample drives the cylindrical roller bearing above the photoelastic disc sample to rotate under the action of friction force, so that rolling friction is realized, and the stress distribution in the photoelastic disc sample can be observed.
Description
Technical Field
The utility model belongs to the technical field of rolling friction failure analysis, and particularly relates to a linear contact rolling friction experimental device.
Background
Friction is an important factor for ensuring normal operation of mechanical equipment and systems, but under long-term operation, the rolling friction coefficient between internal parts is reduced. Especially in a wet slip environment, the reduction of the rolling friction coefficient is easy to cause the device to slip, and the system operation is unstable or fails. There are many rolling friction applications in large mechanical equipment systems, such as in vehicles, where the wheel was used by people about five thousand years ago to make use of rolling friction which is less than sliding friction resistance, but not as small as possible for rolling friction. In recent years, with rapid development of public transportation, rail transit such as high-speed motor train units, urban subways, trams, light rails and the like accounts for a higher proportion of the public transportation. In the transportation under the wet and slippery environment, when the rolling friction coefficient is reduced, the sliding friction action of the train wheels on the track far exceeds the rolling friction action, and the normal operation of the train can be influenced. In a traction state, the train wheels spin on the track; during braking, the train wheels slide on the rails. The automobile wheel and rail scratch damage can be caused, great waste is caused to national property, normal operation of a train and comfort of passengers are affected, and great hidden danger can be brought to life safety of the passengers in serious cases. If rolling friction can be increased in the process, the anti-skid performance of the vehicle is enhanced, and the safety risk can be effectively reduced.
As is known, rolling friction pairs are used in engineering technology in large numbers as sliding friction pairs. The principle of rolling friction to reduce drag has been used as early as in the pre-historical construction of ancient Egypt pyramids. With the utility model of the wheel, it is relatively simple to understand that it is essentially different from sliding friction. In the beginning of the 18 th century, when coulombs first clarified the classical sliding friction theorem, the research on the rolling friction mechanism, which is the rolling friction theorem published in 1785 seen in theoretical mechanics, is started, the rolling friction exists widely in mechanical devices, equipment and systems, and the rolling friction coefficient between the devices is reduced after long-term operation. Particularly, under a wet and slippery working environment, the rolling friction coefficient of an equipment system is generally reduced, slipping and damage are easily caused, the system is unstable or fails, and unpredictable loss is brought to the life of people and the national economy. Therefore, it is necessary to perform an analysis of rolling friction failure. Influenced by experimental effects, the existing linear contact rolling friction photoelastic experiment table is few in China.
Disclosure of Invention
The utility model aims to provide a linear contact rolling friction experiment device which is simple in structure, easy to assemble and operate, capable of performing rolling friction stress experiments on photoelastic samples with different loads and different specifications, high in control and measurement accuracy, accurate and reliable in experiment data and good in repeatability.
In order to achieve the purpose, the utility model provides a linear contact rolling friction experimental device, which comprises a bearing table, a sample fixing seat, a photoelastic disc sample, a driving mechanism, a cylindrical roller, a weight loading mechanism and a camera, wherein the sample fixing seat, the photoelastic disc sample, the driving mechanism, the cylindrical roller, the weight loading mechanism and the camera are arranged on the bearing table,
the photoelastic disc sample is positioned in the sample fixing seat and is connected with the driving mechanism so as to rotate under the action of the driving mechanism;
the cylindrical roller is positioned above the photoelastic disc sample, and when the photoelastic disc sample rotates, the cylindrical roller is driven to rotate through friction force, so that linear contact rolling friction is formed between the photoelastic disc sample and the cylindrical roller;
the weight loading mechanism is used for applying load to the photoelastic disc sample, and the applied load is adjustable in size;
the lens of the camera faces the contact position of the photoelastic disc sample and the cylindrical roller. By adopting the scheme, the photoelastic disc sample is driven to rotate by the driving mechanism, and the rotating photoelastic disc sample drives the cylindrical roller bearing above the photoelastic disc sample to rotate under the action of friction force, so that rolling friction is realized; the load born by the photoelastic disc sample is applied by the weight loading mechanism, the load is adjustable, so that various loads can be provided, and the stress distribution in the photoelastic disc sample can be observed through the camera. The internal stress fields of the two cylindrical rollers during rolling friction are truly simulated, and the experimental result is accurate and reliable.
Further, still include anchor clamps, cylindrical roller rotates and sets up in anchor clamps, and for dismantling the connection between cylindrical roller and the anchor clamps.
Further, the fixture comprises a screw rod, the screw rod is in threaded connection with the fixture, and the cylindrical roller is sleeved on the screw rod. The screw rod is connected with the clamp in a threaded manner in a detachable manner, and the cylindrical roller is conveniently detached and replaced in a detachable connection manner.
Furthermore, a first limiting piece is arranged on the screw rod and positioned on two sides of the cylindrical roller. The horizontal movement of the cylindrical roller is limited by arranging a first limiting piece.
Preferably, the first limiting member is a nut. The cylindrical roller passes through the screw rod with anchor clamps are connected, simultaneously the cylindrical roller passes through two its horizontal direction's of nut restriction removal, open threaded hole in the anchor clamps, only need with the cylindrical roller dress is in on the screw rod, then will the screw rod is fixed in the threaded hole, can accomplish the fixed of cylindrical roller. Meanwhile, the detachable mode can be used for disassembling and assembling the cylindrical rollers with different specifications to realize the line contact rolling friction experiment with different sizes, so that the experimental materials can be conveniently replaced, the damage to the equipment is reduced to the maximum extent, and the operation is further simplified.
Further, the photoelastic disc sample is located in the sample fixing seat, the photoelastic disc sample can be detached, the photoelastic disc sample is limited to move leftwards and rightwards through a second limiting part like a nut, threads are machined on the rotating shaft, the photoelastic disc sample is placed between two nuts and can be limited to move in the horizontal direction of the photoelastic disc, and when the photoelastic disc sample needs to be different in size, the photoelastic disc sample only needs to be mounted on the rotating shaft according to other sizes. Through the scheme, the contact rolling friction research can be carried out on photoelastic disc samples of different sizes and cylindrical rollers of different materials, different experiments can be carried out only by replacing the friction pair, and the operation is easier.
Further, the photoelastic disk sample, the cylindrical roller and the weight loading mechanism are located on the same central axis. Therefore, the experimental device can be accurately centered, the misalignment force caused by the rigidity of the equipment is minimized, additional dynamic load is avoided, and only the weight loading mechanism applies static load, so that the experimental effect is the best.
Furthermore, the driving mechanism comprises a driving motor and a synchronous belt wheel, the driving motor is fixed on the bearing table, and the photoelastic disc sample is connected with the driving motor through the synchronous belt wheel. The photoelastic disc is in transmission with the servo motor through the synchronous belt wheel, and after the servo motor is controlled to rotate through control software, the photoelastic disc and the servo motor are enabled to keep the same rotating speed through the rotation of the synchronous belt wheel.
The supporting frame is fixed on the bearing table, a cross beam is arranged on the supporting frame and above the cylindrical roller, and a through hole is formed in the cross beam;
the weight loading mechanism comprises a weight and a loading rod, the weight is located above the beam, the top end of the loading rod is detachably connected with the weight, the bottom end of the loading rod penetrates through a through hole in the beam to apply load to the photoelastic disc sample, and the diameter of the loading rod is smaller than that of the through hole in the beam. The weight loading mechanism applies a load by a weight, so that a constant load can be applied when the photoelastic disk sample is in contact with the cylindrical roller. Further, the diameter of loading arm is less than the diameter of through-hole on the crossbeam, can be so that the weight reciprocates at the support frame under the drive of loading arm, change that can be convenient cylindrical roller with distance between the photoelastic disc sample when exerting different loads, can add the weight of different masses can, what exert like this is the dead load, and is very little to the error of experiment, can not produce phenomenons such as dynamic load.
Further, offer the oil groove that is used for holding emollient on the sample fixing base, the photoelastic disc sample is located the upper end of oil groove, and when placing emollient in the oil groove, photoelastic disc sample contacts with emollient. The groove is arranged in the sample fixing seat and is used for placing the photoelastic disc sample, and meanwhile, lubricating oil with different specifications can be added into the oil groove of the sample fixing seat so as to reduce friction and measure the film thickness, contact stress and the like during lubrication, so that the application range of the device is further expanded, and the device is stronger in functionality.
Further, the vibration isolation platform is included, and the bottom of the bearing platform is fixed on the vibration isolation platform. Fix the bearing platform on the platform that shakes that separates, can avoid supporting the relative vibrations between mesa and the experimental apparatus to can reduce external environment and to the interference of whole experiment, avoid influencing the experimental result.
Further, a force sensor is provided for placement between the photoelastic disk specimen and the cylindrical roller. The force weighing sensor is only required to be placed between the photoelastic disc sample and the cylindrical roller before an experiment, the load applied by the weight loading mechanism is measured, the force weighing sensor can be taken out after a numerical value is obtained, the force weighing sensor is not required to be fixed on the device all the time, and a new mechanism is not required to be additionally designed for placing the force weighing sensor. The experimental device adopted by the utility model is simple and easy to disassemble, and can be used for modifying and redesigning other functions.
Compared with the prior art, the utility model has at least the following beneficial effects:
the photoelastic disc sample is arranged to rotate in contact with the cylindrical roller, the photoelastic disc sample and the cylindrical roller move, stress distribution conditions of the photoelastic disc sample and the cylindrical roller under static and dynamic conditions are observed through an external camera, different loads can be applied by controlling the number of weights, the generation of dynamic loads is reduced in the rotating process, and the applied load size can be intuitively known by adopting the force weighing sensor. The experimental device is convenient to assemble, simple to operate and high in testing precision.
Drawings
In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below.
Fig. 1 is a side view of a linear contact rolling friction experiment apparatus provided in an embodiment of the present invention (a camera and a camera mounting frame and a part of a support frame are omitted in the figure).
Fig. 2 is an enlarged view of a part of a jig according to an embodiment of the present invention.
FIG. 3 is an enlarged view of the assembly of a photoelastic disk sample in an embodiment of the present invention.
Fig. 4 is a schematic perspective view of a line contact rolling friction experiment apparatus provided in an embodiment of the present invention.
Description of reference numerals:
1-a bearing table; 2-sample fixing seat; 3-driving a motor; 4-a synchronous pulley; 5-photoelastic disc sample; 6-cylindrical rollers; 7-a clamp; 8-a support frame; 9-weight; 10-a screw; 11-a first stop; 12-a camera; 13-a loading rod; 14-a cross beam; 15-camera mount.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "center", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the embodiment of the utility model, the support frame and the bearing platform are processed by taking Q235 as a material, and the support frame and the bearing platform have good hardness, so that when the weight exerts force in the vertical direction, the support frame and the bearing platform can ensure small deformation, even close to no deformation, and can be ignored. The line contact rolling friction place is photoelastic disc and cylindrical roller, the focus research object is two surfaces that contact each other and produce relative motion, the material of cylindrical roller is not limited to the structural steel, can trade many different materials to carry on the experiment, for example: aluminum, polymers, mica, and the like. Simultaneously, also can carry out the experiment under different operating modes, the main stress distribution of structure under the different load of research, different coefficient of friction, this experimental apparatus has fine universality. Because the stress concentration phenomenon generally exists in the field of practical application, the research on the linear contact rolling friction has scientific significance for deepening the basic theory of the linear contact rolling friction and has practical significance for guiding the structure improvement and reducing the stress concentration in the field of engineering application.
Referring to fig. 1 to 4, the linear contact rolling friction experiment apparatus provided by the present invention includes a bearing table 1, a sample fixing seat 2, a driving mechanism, a photoelastic disc sample 5, a cylindrical roller 6, a clamp 7, a support frame 8, a weight 9, a screw 10, a first limiting member 11, a force weighing sensor, and a camera 12. The sample is made of a photoelastic material, the photoelastic material is a general name of a material (specifically including epoxy resin, polycarbonate and the like), the material has a temporary birefringence phenomenon, and a light source can generate optical path difference in the material and can generate stress stripes so as to be convenient for observing stress distribution in the sample.
In one embodiment of the utility model, a through hole is formed at each of four end corners of the bottom of the bearing table 1, a threaded hole is also formed at a corresponding position on the vibration isolation table, the central lines of the four through holes on the bearing table 1 are superposed with the central line of the threaded hole on the vibration isolation table, and the four through holes and the threaded hole are connected and fixed through screws, so that the bearing table 1 is fixed on the vibration isolation table. The vibration isolation table of the present embodiment is an active vibration isolation table.
In one embodiment of the present invention, the bearing platform 1 is in an inverted Contraband shape, that is, the bearing platform 1 is a hollow frame with openings at the bottom corners as fixing positions. The sample fixing seat 2, the photoelastic disc sample 5, the driving mechanism, the cylindrical roller 6 and the weight loading mechanism are all positioned on the bearing platform 1.
The photoelastic disc sample 5 is positioned in the sample fixing seat 2, and the photoelastic disc sample 5 is connected with the driving mechanism to rotate under the action of the driving mechanism; the cylindrical roller 6 is positioned above the photoelastic disc sample 5, and when the photoelastic disc sample 5 rotates, the cylindrical roller 6 is driven to rotate through friction force, so that linear contact rolling friction is formed between the photoelastic disc sample 5 and the cylindrical roller 6; the weight loading mechanism is used for applying load to the photoelastic disc sample 5, and the applied load is adjustable in size; the lens of the camera 12 faces the contact between the photoelastic disk sample 5 and the cylindrical roller 6.
In one embodiment of the present invention, the driving mechanism comprises a driving motor 3 and a synchronous pulley 4, the sample fixing seat 2 and the servo motor 3 are fixed on the bearing platform 1, specifically, the bottom of the sample fixing seat 2 is provided with four threaded holes, the mounting seat of the servo motor 3 is provided with two threaded holes, the bottom of the bearing platform 1 is provided with a circular groove, a bolt passes through the circular groove, and the sample fixing seat 2 and the servo motor 3 are fixed on the bearing platform 1 by a gasket and a nut.
In one embodiment of the present invention, the photoelastic disc sample 5 is disposed in the middle of the sample holder 2, specifically, an oil groove with a depth of 30mm is disposed in the middle of the sample holder 2 (of course, in other embodiments, the depth of the oil groove may be set to other values as required), and holes with a diameter of 10mm are respectively formed on both sides of the sample holder (of course, in other embodiments, the diameter of the hole may be other values) for placing a rolling bearing, the photoelastic disc sample 5 is sleeved on the rotating shaft, and the rotating shaft is provided with the rolling bearing and is disposed in the middle of the sample holder 2. And the rotating shaft is connected with the driving motor 3 through a synchronous belt pulley 4. Thus, when the driving motor 3 is started, the rotating shaft can be driven to rotate, and the photoelastic disc sample 5 is driven to rotate.
In one embodiment of the present invention, the oil groove can be filled with lubricating oil with different specifications to reduce friction. Can be used for measuring the film thickness, the contact stress and the like during lubrication.
In one embodiment of the utility model, both sides of the rotating shaft are provided with threads, the photoelastic disc sample 5 is placed in the middle of the threads, then two nuts are arranged on the threads to fix the photoelastic disc sample 5 and limit the horizontal movement of the photoelastic disc sample, and the connection mode is convenient for disassembling and replacing the photoelastic disc sample 5 and is also convenient for improvement later.
In one embodiment of the present invention, the external thread on the screw 10 is a fine thread, which can be effectively loosened to avoid loosening of the cylindrical roller 6 due to the reaction force during rotation after the load is applied. The rotating shaft sleeved with the photoelastic disc sample 5 is also provided with fine threads, and the photoelastic disc sample 5 is matched with a nut for use, so that the problem that the accuracy of an experiment is influenced due to the looseness of the photoelastic disc sample 5 can be effectively solved, the repeatability is poor, and the data and analysis errors can not be accurately concluded.
The device provided by the utility model is also provided with a clamp 7, the cylindrical roller 6 is rotatably arranged in the clamp 7, and the cylindrical roller 6 is detachably connected with the clamp 7. In one embodiment of the present invention, the clamp 7 is in an inverted U shape, a screw 10 is connected to the opening through an internal thread, and the cylindrical roller 6 is sleeved on the screw 10. Threaded holes are formed in two sides of the opening of the clamp 7, the cylindrical roller 6 is only required to be arranged on the screw rod 10, and then the screw rod 10 is fixed in the threaded holes, so that the cylindrical roller 6 can be fixed. The screw 10 is a hexagonal socket screw.
In one embodiment of the utility model, the supporting frame 8 is further arranged, the cross beam 14 is arranged on the supporting frame 8, the bottom of the supporting frame 8 is provided with two threaded holes, the supporting frame is connected with the bearing table 1 through screws, good stability can be kept, meanwhile, the supporting frame 8 is made of structural steel, good rigidity can be kept, and accidents such as bending deformation and instability cannot be caused.
In one embodiment of the utility model, the weight loading mechanism comprises a weight 9 and a loading rod 13, the weight 9 is positioned above a beam 14, a through hole is formed in the beam 14, the top end of the loading rod 13 is detachably connected with the weight 9, the bottom end of the loading rod passes through the through hole in the beam 14 and is connected with the clamp 7 to apply load to the photoelastic disc sample 5, and the diameter of the through hole in the beam is slightly larger than that of the loading rod 13, so that the loading rod 13 can move up and down in the beam 14. When different loads are applied, weights with different masses can be added, so that the applied static load is the applied static load, the error of the experiment is small, the phenomena of dynamic load and the like cannot be generated, and extra dynamic stress cannot be generated. The weight 9 and the support frame 8 are detachably connected. Weight 9 can be connected with anchor clamps 7 through loading pole 13, reciprocate at support frame 8, can conveniently change the distance between cylindrical roller 6 and the photoelastic disc sample 5, when the experiment is done to needs, down remove loading pole 13, make cylindrical roller 6 and photoelastic disc sample 5 contact, when not doing the experiment or need change photoelastic disc sample 5, can up remove loading pole 13, get rid of cylindrical roller 6 and photoelastic disc sample 5 contact state or be convenient for change photoelastic disc sample 5.
In one embodiment of the present invention, the photoelastic disk sample 5, the cylindrical roller 6, the clamp 7, the support frame 8 and the weight 9 are located on the same central axis. Therefore, the experimental device can be accurately centered, the misalignment force caused by the rigidity of the equipment is minimized, extra dynamic load cannot be generated, only the weights apply static load, and the experimental effect is the best.
In one embodiment of the present invention, the present invention further comprises a camera mounting frame 15, and the camera 12 is mounted and fixed on the camera mounting frame 15.
The device provided by the utility model is also provided with a force weighing sensor. The force weighing sensor is only required to be placed between the photoelastic disc sample 5 and the cylindrical roller 6 before an experiment, the load applied by the weight loading mechanism is measured, the force weighing sensor can be taken out after a numerical value is obtained, and a new mechanism is not required to be additionally designed to place the force weighing sensor.
In the embodiment of the utility model, the servo motor 3 is connected with the photoelastic disc sample 5 through the synchronous belt pulley 4, and the rotation of the servo motor 3 can be controlled by inputting related parameters in related matched software of the servo motor 3. When the servo motor 3 rotates, the photoelastic disc sample 5 can rotate at the same rotating speed through belt transmission, and when the photoelastic disc sample 5 rotates, the cylindrical roller 6 in contact with the photoelastic disc sample can rotate at the same rotating speed under the action of friction force, so that rolling friction is formed, and the experimental device is an important part of a linear contact rolling friction experimental device.
The contact width and the centering performance of the photoelastic disc sample 5 and the cylindrical roller 6 can be adjusted in the embodiment of the utility model, when the width of the contact area needs to be adjusted, the sample fixing seat 2 only needs to be moved, so that the contact width of the photoelastic disc sample 5 and the cylindrical roller 6 reaches the state required by an experiment, the contact area width can be effectively adjusted by the mode, the operation is simple and convenient, and the whole experiment process can be completed by only one person.
The experimental device adopted by the utility model is simple and easy to disassemble, can be used for modifying and redesigning other functions, and has good modification property.
The diameter of all the bolts matched with the experimental device is slightly smaller than that of the through hole.
Before adopting this device to carry out the experiment, assemble the device earlier: from up the assembly down, fix sample fixing base 2 and servo motor 3 on bearing platform 1, the bolt should let in sample fixing base 2 and servo motor 3 through the square groove of 1 bottom of support frame, fix bearing platform 1 on the suitable position on the platform that shakes with the bolt from 1 inboard bearing platform again, then photoelastic disc sample 5 is fixed in the axis of rotation, pack into antifriction bearing in the axis of rotation simultaneously, pack into sample fixing base 2 with the axis of rotation through antifriction bearing in, photoelastic disc sample 5 just is fixed in sample fixing base 2 this moment. The servomotor 3 is connected to the rotating shaft via the synchronous pulley 2. The cylindrical roller 6 is sleeved on the screw 10, M10 nuts are arranged on two sides of the cylindrical roller 6, the cylindrical roller 6 can be prevented from sliding in the horizontal direction, then the set cylindrical roller 6 is installed on the clamp 7 through the screw 10, and the clamp 7 is provided with a threaded hole, so that the screw 10 can be prevented from loosening. Then the clamp 7 and the weight 9 are connected through the loading rod 13, the movement in the vertical direction can be carried out, and the experiment can be carried out after the clamp is installed. The experimental process is as follows:
the loading weight 9 is used for applying different static loads, a specific force value needs to be determined at the moment, the force weighing sensor can be placed between the cylindrical roller 6 and the photoelastic disc sample 5, the applied load value can be read at the moment, and the force weighing sensor can be taken out after the force value is read. Then, experimental conditions can be set, the servo motor 3 is controlled by motion software to rotate at a certain speed, the photoelastic disc sample 5 in the sample fixing seat 2 is driven to rotate by the rotation of the synchronous belt pulley 4, and the rotating speeds of the photoelastic disc sample 5 and the servo motor 3 are the same. Because the photoelastic disc sample 5 is in contact with the cylindrical roller 6, the rotation of the photoelastic disc sample 5 can drive the cylindrical roller 6 to synchronously rotate under the action of friction force, a linear contact rolling friction experiment is formed, and the stress distribution of the photoelastic disc sample 5 can be observed when the photoelastic disc sample 5 and the cylindrical roller 6 rotate through the camera 12. After the image is acquired by using the camera, the main stress in the material can be calculated according to a related formula. Wherein, the calculation formula is as follows:
in the formula (f)αIs the stress fringe coefficient of the photoelastic material, which depends on the type of birefringent material and the wavelength of the incident light. The stress fringe coefficient can be determined by pure bending beam experiments and radial disk compression experiments. N is equal toThe number of the color stripe orders and d is the thickness of the photoelastic disc sample. On the left of the equation is the principal stress difference, σ1、σ2Two stresses are at any point in the photoelastic disk specimen.
The experimental device for the linear contact rolling friction experiment provided by the embodiment of the utility model is easy to assemble and operate, and can be used for performing linear contact rolling friction stress experiments on various material samples with different rotating speeds and different specifications. When the rolling friction experimental apparatus during operation, can observe the inside stress distribution condition of photoelastic material when contacting through external camera, the experimental apparatus that this embodiment provided, control and measurement accuracy are high, and the experimental data is accurate reliable, and repeatability is good.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (10)
1. The utility model provides a line contact rolling friction experimental apparatus which characterized in that: comprises a bearing table (1), a sample fixing seat (2) arranged on the bearing table (1), a photoelastic disc sample (5), a driving mechanism, a cylindrical roller (6), a weight loading mechanism and a camera (12),
the photoelastic disc sample (5) is positioned in the sample fixing seat (2), and the photoelastic disc sample (5) is connected with the driving mechanism to rotate under the action of the driving mechanism;
the cylindrical roller (6) is positioned above the photoelastic disc sample (5), and when the photoelastic disc sample (5) rotates, the cylindrical roller (6) is driven to rotate through friction force, so that linear contact rolling friction is formed between the photoelastic disc sample (5) and the cylindrical roller (6);
the weight loading mechanism is used for applying load to the photoelastic disc sample (5), and the applied load is adjustable in size;
the lens of the camera (12) faces the contact position of the photoelastic disc sample (5) and the cylindrical roller (6).
2. The line contact rolling friction experimental device according to claim 1, characterized in that: still include anchor clamps (7), cylindrical roller (6) rotate to be set up in anchor clamps (7), and be connected for dismantling between cylindrical roller (6) and anchor clamps (7).
3. The line contact rolling friction experimental device according to claim 2, characterized in that: the fixture is characterized by further comprising a screw (10), the screw (10) is in threaded connection with the fixture (7), and the cylindrical roller (6) is sleeved on the screw (10).
4. The line contact rolling friction experimental device according to claim 3, characterized in that: first limiting parts (11) are arranged on the screw (10) and positioned at two sides of the cylindrical roller (6).
5. The line contact rolling friction experimental device according to claim 4, characterized in that: the photoelastic disc sample (5), the cylindrical roller (6) and the weight loading mechanism are positioned on the same central axis.
6. The line contact rolling friction experimental device according to claim 1, characterized in that: the driving mechanism comprises a driving motor (3) and a synchronous belt wheel (4), the driving motor (3) is fixed on the bearing platform (1), and the photoelastic disc sample (5) is connected with the driving motor (3) through the synchronous belt wheel (4).
7. The line contact rolling friction experimental device according to claim 1, characterized in that: the supporting frame (8) is fixed on the bearing table (1), a cross beam (14) is arranged on the supporting frame (8) and above the cylindrical roller (6), and a through hole is formed in the cross beam;
weight loading mechanism includes weight (9) and loading pole (13), and weight (9) are located the top of crossbeam (14), and the top and weight (9) of loading pole (13) can be dismantled and be connected, and the bottom passes through the through-hole on crossbeam (14) in order to give photoelastic disc sample (5) applys the load, and the diameter of loading pole (13) is less than the diameter of through-hole on the crossbeam.
8. The line contact rolling friction experimental device according to claim 1, characterized in that: offer the oil groove that is used for holding emollient on sample fixing base (2), when placing emollient in the oil groove, photoelastic disc sample (5) contacts with emollient.
9. The line contact rolling friction experimental device according to claim 1, characterized in that: the bearing platform is characterized by further comprising a vibration isolation platform, and the bottom of the bearing platform (1) is fixed on the vibration isolation platform.
10. A line contact rolling friction test device according to any one of claims 1 to 9, wherein: a force sensor is also provided, which is intended to be placed between the photoelastic disk specimen (5) and the cylindrical roller (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120997949.9U CN215573762U (en) | 2021-05-11 | 2021-05-11 | Linear contact rolling friction experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120997949.9U CN215573762U (en) | 2021-05-11 | 2021-05-11 | Linear contact rolling friction experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215573762U true CN215573762U (en) | 2022-01-18 |
Family
ID=79859949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120997949.9U Active CN215573762U (en) | 2021-05-11 | 2021-05-11 | Linear contact rolling friction experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215573762U (en) |
-
2021
- 2021-05-11 CN CN202120997949.9U patent/CN215573762U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103575463A (en) | Independent weight loading-unloading dead-load type torque measurement device | |
| CN103776628B (en) | Speed reduction unit torsional rigidity and idle running error test experimental bed and method of testing thereof | |
| CN107907331B (en) | Wheel hub bearing rigidity testing machine | |
| CN113588298B (en) | Test system for vehicle steering performance | |
| US20190011322A1 (en) | Dynamic balance testing device | |
| CN102248485B (en) | Clearance magnetic adsorption type two-dimensional grinding force test system | |
| CN206919856U (en) | A kind of beam rear axle axle housing detects leveling machine | |
| CN215573762U (en) | Linear contact rolling friction experimental device | |
| CN203422232U (en) | Rail vehicle bogie static load detection system | |
| CN113218655A (en) | Linear contact rolling friction experimental device and experimental method | |
| CN112033271B (en) | Automobile brake disc flatness detection device | |
| CN2286308Y (en) | Materials mechanics multi-function teststand | |
| CN216621771U (en) | Reduced scale rolling test bed for wheel set or single-axle bogie | |
| CN212082822U (en) | Rolling bearing test bed | |
| CN111504670B (en) | Comprehensive performance test bed for variable-gauge wheel set | |
| JPH06129953A (en) | Device for measuring stiffness of tire | |
| CN210375724U (en) | Calibrating device of steering wheel angle measuring instrument for automobile test | |
| CN110345837B (en) | Comprehensive checking device of wide-range length measuring tool based on laser interference | |
| CN207163387U (en) | Concentricity measures cubing | |
| CN218726206U (en) | Load loading system of vehicle wheel axle scaling test bed | |
| JP3257617B2 (en) | Vehicle output measuring device and method | |
| CN218512217U (en) | Electric control measuring system of vehicle wheel axle shrinkage ratio test bed | |
| CN218726207U (en) | Vehicle wheel axle shrinkage test bed | |
| CN215115163U (en) | Rolling bearing test device | |
| CN113618654B (en) | High-precision positioning external spline locking mandrel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |