CN111487153A - Bidirectional variable-speed variable-load contact lubrication abrasion integrated tester - Google Patents

Abstract

The invention relates to an integrated testing machine for bidirectional variable load contact lubrication and wear, belonging to the technical field of load contact lubrication and wear. Including frame, loading device, steel ball driving device, glass disk driving device, cam driving device and optical acquisition system; the steel ball and glass disk form point contact under variable load conditions, and the glass disk (or metal disk), steel The ball and the cam are brought into contact and make relative motions under certain regular load conditions. The oil film image of the contact area is collected by an optical microscope and a CCD camera and transmitted to the computer, so that the formation of the steel ball and the glass disk can be observed and stored in real time. The thickness and morphology of the elastic hydrodynamic lubricating oil film, or the wear between the steel ball and the metal disk can be studied. The invention is simple in structure, strong in practicability and reliable in operation, and provides a reliable experimental device for studying the lubrication or wear problems of bidirectional (axial, circumferential) variable speed point contact under variable load conditions.

Description

A two-way speed change variable load contact lubrication and wear integrated test machine

technical field

The invention relates to an integrated test machine for bidirectional variable load contact lubrication and wear, belonging to the technical field of load contact lubrication and wear.

Background technique

Bearings, gears and industrial chains in machinery will generate lateral vibration perpendicular to the main motion direction during the working process for various reasons, resulting in speed changes of mechanical elements in both directions of the working plane. The existing optical elastic hydrodynamic lubrication and wear test machine can only simulate the speed change in one direction, so it cannot accurately and effectively simulate the actual working conditions. In addition, since the mechanical motion may be under variable load conditions, the existing elastohydrodynamic lubrication experimental machines are not yet able to perform experiments on point contacts with speed changes in two directions and variable load conditions.

To sum up, there is currently no experimental machine for studying the lubrication or wear problems of bidirectional (axial, circumferential) speed change points under variable load conditions. Therefore, the technical field needs to design a bidirectional variable load contact lubrication and wear integrated experimental device, so as to better simulate the actual working conditions, so as to better study the bidirectional (axial, axial, Circumferential) lubrication and wear characteristics of variable speed point contacts, measuring the shape and thickness of the oil film, and the wear of the test piece.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: the prior art cannot effectively and accurately simulate the actual working condition of point contact bidirectional (axial, circumferential) speed change under variable load conditions in the field of optical elastic hydrodynamic lubrication, and cannot accurately perform lubrication and wear experiment.

In order to solve the above technical problems, the technical solution of the present invention is to provide a two-way variable load contact lubrication and wear integrated testing machine, which is characterized in that it includes a frame, a loading device, a steel ball drive device, a glass disk drive device, and a cam drive device. Apparatus and optical acquisition system, wherein:

A steel ball driving device, a glass disk driving device and a cam driving device are arranged on the frame;

The steel ball drive device is used to drive the steel ball; when the lubrication experiment is performed, the glass disk drive device is used to drive the glass disk, and when the wear experiment is performed, the glass disk drive device is used to drive the metal disk;

The loading device is used to connect the upper end of the steel ball with the lower surface of the glass disk or metal disk, and apply a variable load to the steel ball;

Cam drive device, used to change the speed of the steel ball in the axial direction;

The steel ball and the glass disc or metal disc are in contact with the glass disc or metal disc under the action of the ball drive device, the glass disc drive device, the cam drive device and the loading device, and make relative motions under a certain regular pressure;

The optical acquisition system is used to acquire the oil film image or wear condition generated by the relative movement of the steel ball and the glass.

Preferably, the steel ball driving device comprises a motor support, a motor, a coupling, a steel ball connecting rod and a steel ball; the motor support is arranged on the frame, the motor support is provided with a motor, and the motor One end of the roller connecting rod is connected through a coupling, and the other end of the roller connecting rod is provided with a steel ball.

Preferably, the glass disk drive device includes a glass disk or a metal disk, a glass disk sleeve, a glass disk sleeve end cover, a glass disk gland, a spherical roller bearing, a second coupling, a second motor support and a second motor The second motor bracket is arranged on the frame, the second motor bracket is provided with the second motor, the second motor is connected with one end of the glass disk rotating rod through the second coupling, and the other end of the glass disk rotating rod is provided with the glass disk or the other end. The metal disc and the glass disc press cover; the glass disc sleeve is arranged on the frame, the self-aligning roller bearing is arranged in the glass disc sleeve, the glass disc sleeve end cover is arranged above the glass disc sleeve, and the glass disc rotates The middle part of the rod is sleeved in the spherical roller bearing after passing through the end cover of the glass disc sleeve.

Preferably, rubber pads are respectively provided between the glass disk rotating rod and the glass disk or metal disk and between the glass disk or metal disk and the glass disk press cover.

Preferably, the loading device includes a steel ball clamp, a loading support plate, a bearing seat, a loading sleeve, a thimble, a third coupling, a third motor bracket, a reducer and a third motor; There is a motor bracket 3; a loading sleeve is arranged under the upper table surface provided on the frame; a reducer is arranged on the motor bracket 3, one end of the reducer is connected with the motor 3, and the other end of the reducer is connected with the load through the coupling 3 The loading rod provided at one end of the sleeve is connected; the ejector pin provided at the other end of the loading sleeve passes through the upper table surface and is in contact with the lower surface of the loading support plate provided on the upper table surface; There is a steel ball clamp, and the steel ball clamp supports and connects the steel balls.

Preferably, the loading pallet is connected to the upper table surface through a bearing seat, the ejector pin passes through the upper table surface to support and connect one end of the lower surface of the loading pallet, and the upper surface of the middle part of the loading pallet is provided with There are steel ball clamps.

Preferably, the steel ball clamp includes a clamp shell with a concave structure, and the bottom of the concave structure is arranged on the loading pallet; the interior of the clamp shell is provided with two sets of bearings side by side, and the bearings pass through the bearing shaft passing through the clamp shell. Connected with the fixture shell, the steel balls are arranged above the two parallel sets of bearings.

Preferably, one end of the ejector pin provided in the loading sleeve passes through the upper table, and the other end is connected to the loading rod through the cylinder core provided in the loading sleeve; one end of the cylinder core is connected to the ejector pin, and the other end of the cylinder core is connected to the loading rod It is made into a tubular shape, and the end of the tubular core is provided with one end of the loading rod; the outer circumference of the tube core and the outer circumference of the loading rod are sleeved with a spring; the outer circumference of the loading rod is also sleeved with a spring for making the spring in a compressed state The loading plate, the loading rod and the loading sleeve are provided with a limiting structure for preventing the loading rod from slipping down from the loading sleeve.

Preferably, the limiting structure includes a loading barrel end cover arranged at the bottom end of the loading barrel, the loading barrel end cover is provided with a self-aligning ball bearing, and the other end of the loading rod passes through the self-aligning ball bearing and the loading barrel end The cover is connected with the reducer; a pressure sensor for real-time measurement of the force of the thimble is arranged between the thimble and the core; the side wall of the loading sleeve is provided with a Open slot for adjusting the position of the loading tray.

Preferably, the cam drive device includes a motor bracket 4 arranged on the frame, the motor bracket 4 is provided with a motor 4, the motor 4 is connected with one end of the cam link through the coupling 4, and the other end of the cam link is connected Equipped with cam.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The device of the present invention can clamp steel balls, as well as glass disks or metal disks. The loading device can make the steel balls form point contact with the glass disks or metal disks under a certain load. The steel ball driving device and the cam driving device can Make the steel ball move at variable speed in the axial and circumferential directions, and the glass disc has its own driving device, which increases the practicability and reliability of the test;

(2) Under the state that the steel ball can be in contact with the glass disk or metal disk to form point contact, a variable load can be applied to the steel ball according to a certain law through the loading device;

(3) The image of the elastic hydrodynamic lubricating oil film formed by the steel ball and the glass disk or metal disk can be observed and stored in real time, and the shape and thickness of the oil film can be measured.

Description of drawings

Fig. 1 is the main structure schematic diagram of a kind of bidirectional variable-load variable load contact lubrication and wear integrated testing machine provided by the present invention;

Fig. 2 is a kind of bidirectional speed change variable load contact lubrication and wear integrated test machine upper table structure diagram provided by the present invention;

3 is a top view of the main structure of a two-way variable load contact lubrication and wear integrated testing machine provided by the present invention;

4A and 4B are a front view and a top view of a steel ball clamp of a bidirectional variable-load variable load contact lubrication and wear integrated testing machine provided by the present invention.

Reference signs: 1. Upper table; 2. Glass disc sleeve; 3. Glass disc; 4. Spherical roller bearing; 5. Glass disc sleeve end cover; 6. Rubber pad; 7. Glass disc gland; 8. Glass disc rotating rod; 9. Cam; 10. Steel ball connecting rod; 11. Double nut one; 12. Steel ball; 13. Steel ball clamp; 14. Loading plate; 15. Bearing seat; 16. Coupling 1; 17. Motor bracket 1; 18. Motor 1; 19. Loading sleeve; 20. Thimble; 21. Pressure sensor; 22. Core; 23. Spring; 24. Loading plate; 25. Loading rod; 26. Self-aligning ball bearing; 27. Loading cylinder end cover; 28. Coupling three; 29. Motor bracket three; 30. Reducer; 31. Motor three; . Motor bracket two; 36. Coupling two; 37. Double nut two; 38. Cam connecting rod; 39. Motor bracket four; 40. Motor four; 41. Coupling four.

Detailed ways

The present invention will be further described below in conjunction with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

As shown in Figures 1 to 3 and Figures 4A and 4B, the present invention provides a bidirectional variable load contact lubrication and wear integrated testing machine, including a frame, a loading device, a steel ball drive device, a glass disk drive device, and a cam drive device. device and optical acquisition system. For convenience of illustration, only the cam 9 in the cam drive device is shown in FIG. 1 . The upper table 1 provided with the frame is provided with a steel ball driving device, a glass disk driving device and a cam driving device. The top of the steel ball 12 driven by the steel ball driving device is connected in point contact with the lower surface of the glass disk 3 driven by the glass disk driving device. Under the steel ball 12 driven by the steel ball driving device, there is a loading device that applies a variable load to the steel ball. Above the position where the steel ball 12 driven by the steel ball driving device contacts with the glass disk 3 driven by the glass disk driving device, an optical acquisition system for collecting oil film images is provided.

In this embodiment, the frame is constituted as follows: four pillars 33 are respectively connected with the upper table surface 1 and the lower table surface 32 by screws to constitute the frame of the experimental machine.

The steel ball drive device includes a motor bracket 17 , a motor 18 , a coupling 16 , a double nut 11 , a steel ball connecting rod 10 and a steel ball 12 . The upper table 1 provided with the frame is provided with a motor bracket 1 17 , the motor bracket 1 17 is provided with a motor 1 18 , and the motor 1 18 is connected to one end of the steel ball connecting rod 10 through the coupling 1 16 . A steel ball 12 is installed at the other end.

In this embodiment, the motor bracket 1 17 is an L-shaped plate structure, the lower side plate is provided with two strip-shaped through holes for screw connection with the upper table 1, and the side plate is provided with a circular through hole and four small through holes. threaded through holes for a 18-screw connection with the motor. The center of the steel ball 12 is machined with a through hole. After the steel ball connecting rod 10 is inserted into the through hole, a double nut 11 is used to fasten it.

The glass disk drive device includes glass disk 3, spherical roller bearing 4, glass disk sleeve end cover 5, rubber pad 6, glass disk press cover 7, glass disk rotating rod 8, coupling two 36, motor bracket two 35 and motor two 34. The lower surface of the upper table 1 provided on the frame is provided with a second motor bracket 35 , and the side wall of the second motor bracket 35 is provided with an opening slot for adjusting the tightness of the second coupling 36 . The second motor bracket 35 is provided with a second motor 34, and the second motor 34 is connected with one end of the glass disk rotating rod 8 through the second coupling 36, and the other end of the glass disk rotating rod 8 is provided with a glass disk 3, and above the glass disk 3 is provided with The glass disc pressing cover 7 is screwed to the glass disc rotating rod. A glass disc sleeve 2 is arranged on the upper table 1 provided on the frame, and a self-aligning roller bearing 4 is arranged in the glass disc sleeve 2 . The outer circumference of the lower end of the glass disk rotating rod 8 is sleeved in the spherical roller bearing 4 . Rubber pads 6 are respectively provided between the glass disk 3 and the glass disk rotating rod 8 and between the glass disk 3 and the glass disk press cover 7 .

In this embodiment, a glass disk 3 or a metal disk can be used according to the experimental requirements. One end of the second motor bracket 35 is screwed to the bottom of the upper table 1 of the frame, and the other end is screwed to the second motor 34 . One end of the glass disk rotating rod 8 is screwed with the motor 34 through a coupling 36 . The glass plate pressing cover 7 is screwed with the glass plate rotating rod 8 so as to fix the glass plate 3 . The glass disc sleeve 2 is screwed to the upper surface of the upper table 1 of the frame, and a self-aligning roller bearing 4 is arranged therein. The upper end of the glass disc sleeve 2 is screwed to the end cover 5 of the glass disc sleeve.

The loading device includes a steel ball clamp 13 , a loading pallet 14 , a bearing seat 15 , a loading sleeve 19 , a thimble 20 , a third coupling 28 , a third motor bracket 29 , a reducer 30 and a third motor 31 . A reducer bracket 29 is provided on the lower table surface 32 provided by the frame. A loading sleeve 19 is provided under the upper table 1 provided by the frame. The motor bracket 3 29 is provided with a reducer 30 , one end of the reducer 30 is connected to the third motor 31 , and the other end of the reducer 30 is connected to the loading rod 25 provided at one end of the loading sleeve 19 through the third coupling 28 . The ejector pin 20 provided at the other end of the loading sleeve 19 passes through the upper table surface 1 and is in contact with the lower plate surface of the loading support plate 14 provided on the upper table surface 1 . A steel ball clamp 13 is provided on the upper surface of the loading pallet 14 , and the steel ball clamp 13 supports the steel ball 12 driven by the connection with the steel ball driving device. The loading pallet 14 is connected to the upper table 1 through the bearing seat 15 . The steel ball clamp 13 includes a clamp shell with a concave structure, and the bottom of the concave structure is arranged on the loading pallet 14 . Two sets of bearings are arranged side by side inside the shell of the steel ball clamp 13 . The bearings are connected to the clamp shell through a bearing shaft running through the shell of the clamp. The steel balls 12 driven by the roller drive device are arranged above the two sets of bearings. In this embodiment, the fixture shell is a concave structure, and there is a bar-shaped bead on each of the two sides. The bar-shaped bead is connected with the main body of the fixture shell by screws; each bearing shaft is equipped with a set of bearings, and then the bearing shaft with the bearing is installed. Installed on the fixture shell; during the experiment, the steel ball 12 was placed in the middle of the two sets of bearings of the steel ball fixture 13, so as to use a loading device to apply a load to the steel ball 12 through the steel ball fixture 13. One end of the ejector pin 20 provided in the loading sleeve 19 passes through the upper table 1 , and the other end is connected to the loading rod 25 through the cylinder core 22 provided in the loading sleeve 19 . One end of the cylinder core 22 is connected to the thimble 20 , the other end of the cylinder core 22 is tubular, and one end of the loading rod 25 is arranged in the tube. A spring 23 is sleeved on the outer circumference of the tube core 22 and the outer circumference of the loading rod 25 . The outer circumference of the loading rod 25 is also sleeved with a loading disc 24 for keeping the spring 23 in a compressed state. Between the loading rod 25 and the loading sleeve 19 is a limiting structure for preventing the loading rod 25 from slipping down from the loading sleeve 19 . The limiting structure includes a loading cylinder end cover 27 arranged at the bottom end of the loading sleeve 19. The loading cylinder end cover 27 is provided with a self-aligning ball bearing 26, and the other end of the loading rod 25 passes through the self-aligning ball bearing 26 and the end of the loading cylinder. The cover 27 is connected to the reducer 30 . A pressure sensor 21 is provided between the ejector pin 20 and the cylinder core 22 for measuring the force on the ejector pin 20 in real time. An opening slot for adjusting the position of the loading disc 24 is provided on the side wall of the loading sleeve 19 in the axial direction parallel to the central axis of the loading sleeve 19 .

In this embodiment, super glue is used to connect the ejector pin 20 , the pressure sensor 21 and the core 22 in sequence, so that the pressure sensor 21 can measure the force on the ejector pin 20 in real time. One end of the cylinder core 22 is processed with a tube for connecting one end of the loading rod 25, the spring 23 is sleeved on the tube, and then the loading rod 25 equipped with the loading disc 24 is loaded into the cylinder core 22, wherein the loading disc 24 is sleeved on the outer periphery of the loading rod 25 , adjust the position of the loading disc 24 on the loading rod 25 until the two ends of the spring 23 are in contact with the base of the cylinder core 22 and the loading disc 24 and are in a compressed state. After the lower end of the loading rod 25 is installed into the self-aligning ball bearing 26, the assembled part from the thimble 20 to the self-aligning ball bearing 26 is assembled into the loading sleeve 19, and then the loading cylinder end cover 27 is installed at the bottom of the loading sleeve 19. , the loading sleeve 19 is screwed to the end cover 27 of the loading cylinder. The loading sleeve 19 is screwed to the upper table 1 so as to fix the loading device and bear the load. There is a strip-shaped hole in the axial direction of the right cylinder wall of the loading sleeve 19. After the loading plate 24 is positioned, use a screw from the outside to the inside to pass through the strip hole and screw it into the threaded hole on the loading plate 24. , so that the loading plate 24 is fixed circumferentially. The motor bracket 3 29 is a C-shaped plate structure, and the upper surface has a large circular through hole and four small threaded through holes for screw connection with the reducer 30; Connect with 32 screws on the lower table. The reducer 30 is connected with the third motor 31 by screws, and is connected with the loading rod 25 through the third coupling 28 .

The cam drive device includes a motor bracket four 39 on the upper table 1, the motor bracket four 39 is provided with a motor 40, the motor 40 is connected with one end of the cam link 41 through a coupling 41, and the other end of the cam link 41 is provided with a cam 9. The cam 9 is fastened on the cam connecting rod through the second double nut 37.

In this embodiment, the motor bracket 4 39 is an L-shaped plate-like structure, and the bottom plate is provided with two strip-shaped through holes, so that it can be screwed with the upper table 1, and its side plate is provided with a circular through hole and four through holes. Small threaded through holes so that four 40 screws can be connected with the motor.

In this embodiment, the optical acquisition system is composed of a light source, a CCD camera and an optical microscope, and the CCD camera and the optical microscope are connected to a computer. The experimental machine is mainly composed of a frame, a loading device, a steel ball drive device, a glass disk or metal disk drive device, a cam drive device and a steel ball clamp 13 .

The working principle of this experimental machine is: use PLC and servo motor relay to drive the motor 331 to rotate, and then drive the loading rod 23 to rotate through the reducer 30 and the coupling 328. Since the circumference of the loading plate 24 is fixed, it can only rotate along the As the loading rod 25 moves up and down, it is loaded or unloaded by the spring 23, so that the steel ball 12 is in contact with the glass plate 3 and can exert a certain regular variable load. A PLC and a servo motor are used to drive the motor one 18, and then the steel ball 12 is driven to rotate through the coupling one 16 and the steel ball connecting rod 10. The second motor 34 is driven by the PLC and the servo motor, and then the glass plate 3 is driven to rotate through the second coupling 36 and the glass plate connecting rod 8 . Use PLC and servo motor to drive the motor 40, and then drive the cam 9 through the coupling 41 and the cam link 38. When the cam 9 rotates, it will periodically push the steel ball link 10 in the steel ball drive device, causing steel The velocity of the ball 12 in the axial direction varies. The steel ball 12 is in contact with the glass disc 3 under the action of the driving device, the cam and the loading device, and makes relative movement under a certain regular pressure. An optical acquisition system consisting of a light source, a CCD camera and an optical microscope is located directly above the steel ball 12 and the glass disk 3, and is used to collect the oil film image in the contact area; the CCD camera is connected to the computer to transmit the collected images.

When this testing machine is tested: first use PLC and servo driver to drive motor 3 31 to rotate slowly, load until steel ball 12 just touches glass plate 3, zero pressure sensor 21, and then continue to load to a predetermined load. The first motor 18, the second motor 34, and the fourth motor 40 are driven by PLC and servo relay, thereby driving the steel ball 12, the glass plate 3 and the cam 9 to move. The microscope and CCD camera located above the contact area of the steel ball 12 and the glass disk 3 collect the contact oil film image in real time and transmit it to the computer. For experiments under variable load conditions, it is only necessary to drive the motor 3 31 to move according to a certain rule, so that a variable load is applied to the contact area formed by the steel ball 12 and the glass disk 3 through the above loading device. The oil film images of the contact area were acquired using an optical acquisition system consisting of a light source, a CCD camera and an optical microscope. Use computer and oil film analysis software to measure and analyze oil film thickness and shape.

When using the present invention to carry out the wear test, it is only necessary to replace the glass disk in the above test process with a metal disk of the same specification, and the principle and test method are basically the same. After the wear test is completed, the wear condition of the steel ball 12 and the metal disk can be measured by using a surface topography instrument or the like.

Claims (10)

1. a bidirectional variable load contact lubrication and wear integrated testing machine is characterized in that: comprise frame, loading device, steel ball drive device, glass disk drive device, cam drive device and optical acquisition system, wherein: A steel ball driving device, a glass disk driving device and a cam driving device are arranged on the frame; The steel ball drive device is used to drive the steel ball; when the lubrication experiment is performed, the glass disk drive device is used to drive the glass disk, and when the wear experiment is performed, the glass disk drive device is used to drive the metal disk; The loading device is used to connect the upper end of the steel ball with the lower surface of the glass disk or metal disk, and apply a variable load to the steel ball; Cam drive device, used to change the speed of the steel ball in the axial direction; The steel ball and the glass disc or metal disc are in contact with the glass disc or metal disc under the action of the ball drive device, the glass disc drive device, the cam drive device and the loading device, and make relative motions under a certain regular pressure; The optical acquisition system is used to acquire the oil film image or wear condition generated by the relative movement of the steel ball and the glass. 2. The bidirectional variable load contact lubrication and wear integrated testing machine as claimed in claim 1, wherein the steel ball driving device comprises a motor support, a motor, a coupling, and a steel ball connecting rod and steel balls; the first motor bracket is arranged on the frame, the first motor bracket is provided with the first motor, the first motor is connected to one end of the roller connecting rod through the coupling one, and the other end of the roller connecting rod is provided with a steel ball. 3. The bidirectional variable load contact lubrication and wear integrated testing machine as claimed in claim 1, wherein the glass disk drive device comprises a glass disk or a metal disk, a glass disk sleeve, and a glass disk sleeve end Cover, glass disc gland, self-aligning roller bearing, coupling two, motor bracket two and motor two; motor bracket two is arranged on the frame, motor bracket two is provided with motor two, motor two passes through the coupling The second is connected with one end of the glass disk rotating rod, and the other end of the glass disk rotating rod is provided with the glass disk or the metal disk and the glass disk press cover; the glass disk sleeve is arranged on the frame, and the glass disk sleeve is provided with There is a self-aligning roller bearing, a glass disk sleeve end cover is arranged above the glass disk sleeve, and the middle part of the glass disk rotating rod passes through the glass disk sleeve end cover and is sleeved in the self-aligning roller bearing. 4. A bidirectional variable load contact lubrication and wear integrated testing machine as claimed in claim 3, characterized in that: between the glass disk rotating rod and the glass disk or metal disk and between the glass disk or metal disk Rubber pads are respectively provided between the disc and the glass disc press cover. 5. The bidirectional variable load contact lubrication and wear integrated testing machine as claimed in claim 3, wherein the loading device comprises a steel ball clamp, a loading pallet, a bearing seat, a loading sleeve, a thimble, a coupling The third shaft, the third motor support, the reducer and the third motor; the lower table provided with the frame is provided with the motor support three; the upper table provided with the frame is provided with a loading sleeve; the motor support three is above There is a reducer, one end of the reducer is connected with the motor 3, the other end of the reducer is connected with the loading rod provided at one end of the loading sleeve through the coupling 3; the thimble provided at the other end of the loading sleeve passes through the upper table and the upper table The lower surface of the loading pallet provided on the upper surface is in contact and connection; the upper surface of the loading pallet is provided with a steel ball clamp, and the steel ball clamp supports and connects the steel balls. 6 . The bidirectional variable load contact lubrication and wear integrated testing machine according to claim 5 , wherein the loading support plate is connected to the upper table surface through a bearing seat, and the ejector pin passes through the upper table surface. 7 . One end of the lower surface of the loading pallet is supported and connected, and a steel ball clamp is arranged on the upper surface of the middle part of the loading pallet. 7. A bidirectional variable load contact lubrication and wear integrated testing machine as claimed in claim 6, characterized in that: the steel ball clamp comprises a clamp shell of a concave structure, and the bottom of the concave structure is arranged on the load On the pallet; two sets of bearings are arranged side by side inside the fixture shell, the bearings are connected with the fixture shell through the bearing shaft penetrating the fixture shell, and the steel balls are arranged above the two sets of side-by-side bearings. 8. A two-way variable-load variable load contact lubrication and wear integrated testing machine as claimed in claim 7, characterized in that: one end of the thimble provided with the loading sleeve passes through the upper table surface, and the other end passes through the middle of the loading sleeve. Some cylinder cores are connected with the loading rod; one end of the cylinder core is connected to the thimble, the other end of the cylinder core is tubular, and the end of the tubular cylinder core is provided with one end of the loading rod; The outer circumference is sleeved with a spring; the outer circumference of the loading rod is also sleeved with a loading disc for making the spring in a compressed state, and a limit for preventing the loading rod from slipping from the loading sleeve is set between the loading rod and the loading sleeve structure. 9. A two-way variable-load variable load contact lubrication and wear integrated testing machine as claimed in claim 8, characterized in that: the limiting structure comprises a loading cylinder end cover arranged at the bottom end of the loading sleeve cylinder, and the loading cylinder end A self-aligning ball bearing is arranged on the cover, and the other end of the loading rod is connected to the reducer through the self-aligning ball bearing and the end cover of the loading cylinder; between the thimble and the cylinder core, there is a real-time measurement of the force of the thimble. A pressure sensor; the side wall of the loading sleeve is provided with an opening groove for adjusting the position of the loading disc on the axial direction parallel to the central axis of the loading sleeve. 10. The bidirectional variable-load variable load contact lubrication and wear integrated testing machine as claimed in claim 9, wherein the cam drive device comprises a motor bracket 4 arranged on the frame, and the motor bracket 4 is provided with a motor bracket 4. The fourth motor is connected with one end of the cam connecting rod through the fourth coupling, and the other end of the cam connecting rod is provided with a cam.

Images