Adjustable friction-wear test device

Abstract

The invention relates to the technical field of wear tests, and discloses an adjustable friction wear test device which comprises a testing machine, a test bed is fixedly mounted in an inner cavity of the testing machine, a first friction pair is arranged on one side of the test bed, a second friction pair is arranged on the other side of the test bed, and the first friction pair is in contact with the surface of the second friction pair. The top of the test bench is slidably connected with a base, and the base is provided with an adjusting assembly used for adjusting the second friction pair. According to the adjustable friction and wear test device, any one moving column is rotated to enable a fixed rod on the inner side of the moving column to move forwards or backwards, so that the horizontal position between two adjusting blocks is changed, a swinging block is deflected under the rotary connection action of a connecting lug, and a second friction pair is inclined and changed according to actual requirements; the angle of the contact face of the first friction pair and the second friction pair is adjusted so as to simulate the abrasion states at different angles, and the abrasion condition of the friction pairs under the actual working condition can be simulated.

Description

Technical Field

[0001] The invention relates to the technical field of wear testing, and in particular to an adjustable friction and wear testing device. Background Art

[0002] Simulated friction and wear testing is an important means of material research and development, product design and performance evaluation. It can evaluate the wear resistance, fatigue resistance and corrosion resistance of materials, optimize product design, predict product life, and promote the development of new materials and new processes. By simulating the friction and wear process under different working conditions, simulation tests can more realistically reflect the actual wear conditions and provide reliable data support for material selection, product design and product maintenance.

[0003] The contact angles between two friction pairs vary. For example, the contact angle between the crankshaft and the connecting rod of a car engine is not vertical, but has a certain inclination angle. If the test device cannot adjust the contact surface angle, it will not be able to affect the distribution of the load on the friction pair, and it will be difficult to simulate the wear state at different angles, resulting in the test results being unable to reflect the actual wear conditions. Therefore, an adjustable friction and wear test device is urgently needed at this stage. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an adjustable friction and wear testing device, which can effectively solve the problem in the prior art that the testing device cannot adjust the contact surface angle and it is difficult to simulate the wear state at different angles, resulting in the test results being unable to reflect the actual wear conditions.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention provides an adjustable friction and wear testing device, comprising a testing machine, a test bench is fixedly installed in the inner cavity of the testing machine, a first friction pair is arranged on one side of the test bench, and a second friction pair is arranged on the other side of the test bench, the first friction pair is in contact with the surface of the second friction pair, the top of the test bench is slidably connected with a base, and an adjustment component for adjusting the second friction pair is arranged on the base;

[0009] The adjustment assembly includes an L-shaped plate fixedly mounted on the top of the base, a movable column is threadedly connected to the L-shaped plate, and two movable columns are stacked, a fixed rod is rotatably mounted on the inner side of the movable column, an adjustment block is arranged on the side of the fixed rod close to the first friction pair, and connecting ears are arranged on the sides of the two adjustment blocks close to each other, a swing block is rotatably mounted between the two connecting ears via a rotating shaft, and a cavity for mounting the second friction pair is opened in the swing block.

[0010] Furthermore, a turning handle is fixedly mounted on one end of the movable column away from the second friction pair, and the turning handle is located on the outer side of the L-shaped plate.

[0011] Furthermore, a horizontal slide groove is provided in the inner cavity of the fixing rod, a slide rod is slidably connected in the horizontal slide groove, one end of the slide rod is fixedly connected to the outer wall of the adjustment block, and an elastic member is sleeved on the outer side of the slide rod.

[0012] Furthermore, a thread groove is provided in the middle of the movable column, a knob is threadedly connected to the thread groove, one end of the elastic member is connected to the outer wall of the knob, and the other end of the elastic member is rotatably connected to the outer wall of the adjustment block.

[0013] Furthermore, the testing machine is provided with a conveying assembly for conveying the medium, and the conveying assembly comprises a conveying block slidably connected to the top wall of the testing machine and connected to an external pump body, and a conveying pipe is installed at the bottom of the conveying block.

[0014] Furthermore, the delivery pipe is a metal bellows, and the bottom outlet of the delivery pipe faces between the first friction pair and the second friction pair.

[0015] Furthermore, a conical groove is provided at the bottom of the testing machine, a collecting frame for collecting the medium is arranged in the conical groove, and an opening adapted to the collecting frame is provided on the wall of the testing machine.

[0016] Furthermore, a linear actuator is fixedly mounted on the wall of the test bench, a connecting frame is fixedly mounted on the telescopic end of the linear actuator, a shaft is rotatably mounted on the connecting frame, and both ends of the shaft extend out of the outside of the connecting frame, the first friction pair is fixedly mounted on the middle part of the shaft, and a through hole for assembly is opened on the first friction pair.

[0017] Furthermore, a driving motor is installed on one side of the connecting frame through a fixing plate, a driving wheel is fixedly sleeved at the output end of the driving motor, a driven wheel is fixedly sleeved at one end of the shaft, and the driving wheel and the driven wheel are connected by a sleeved belt transmission.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention rotates any one of the movable columns to move the inner fixed rod forward or backward, so that the horizontal position between the two adjustment blocks changes. Under the rotational connection of the connecting ear, the swing block is deflected, so that the second friction pair is tilted according to actual needs, thereby adjusting the contact surface angle of the first friction pair and the second friction pair to simulate the wear state at different angles, and can simulate the wear condition of the friction pair under actual working conditions.

[0020] 2. In the present invention, when it is necessary to increase the contact pressure between the first friction pair and the second friction pair, the knob is rotated clockwise to move the knob toward the side close to the adjustment block, thereby reducing the compression of the elastic member to increase the contact pressure between the first friction pair and the second friction pair; when it is necessary to reduce the contact pressure between the first friction pair and the second friction pair, the knob is rotated counterclockwise to move the knob away from the adjustment block, thereby increasing the compression of the elastic member to reduce the contact pressure between the first friction pair and the second friction pair. By changing the contact pressure, various friction and wear conditions in actual applications can be simulated. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2 It is a structural schematic diagram of an adjustment component according to an embodiment of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of a swing block according to an embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the sliding rod according to an embodiment of the present invention;

[0026] Figure 5 It is a cross-sectional structural schematic diagram of a testing machine according to an embodiment of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the first friction pair according to an embodiment of the present invention.

[0028] The numbers in the figure represent: 1. testing machine; 2. test bench; 3. first friction pair; 4. second friction pair; 5. base; 6. adjustment assembly; 61. L-shaped plate; 62. moving column; 63. fixed rod; 64. adjustment block; 65. connecting ear; 66. rotating shaft; 67. swing block; 68. horizontal slide groove; 69. slide rod; 610. elastic member; 611. threaded groove; 612. knob; 7. conveying assembly; 71. conveying block; 72. conveying pipe; 73. conical groove; 74. collecting frame; 8. linear actuator; 9. connecting frame; 10. shaft; 11. through hole; 12. driving motor; 13. driving wheel; 14. driven wheel. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention will be further described below in conjunction with the embodiments.

[0031] Example 1, reference Figure 1 - Figure 6 , which is the first embodiment of the present invention, provides an adjustable friction and wear testing device, including a testing machine 1, a test bench 2 is fixedly installed in the inner cavity of the testing machine 1, a first friction pair 3 is arranged on one side of the test bench 2, and a second friction pair 4 is arranged on the other side of the test bench 2, the first friction pair 3 is in contact with the surface of the second friction pair 4, the top of the test bench 2 is slidably connected with a base 5, and an adjustment component 6 for adjusting the second friction pair 4 is installed on the base 5.

[0032] Specifically, a transparent sliding protective door is slidably installed on the front of the testing machine 1, and a transparent window is provided on the top of the testing machine 1, so as to facilitate observation of the wear conditions of the first friction pair 3 and the second friction pair 4 from different angles.

[0033] Specifically, the first friction pair 3 is in the shape of a ring, the second friction pair 4 is in the shape of a flat plate, and the center of the first friction pair 3 and the center of the second friction pair 4 are located in the same height plane.

[0034] The adjustment assembly 6 includes an L-shaped plate 61 fixedly mounted on the top of the base 5, a movable column 62 is threadedly connected to the L-shaped plate 61, and the movable columns 62 are stacked in two, a fixed rod 63 is rotatably mounted on the inner side of the movable column 62, an adjustment block 64 is arranged on the side of the fixed rod 63 close to the first friction pair 3, and the two adjustment blocks 64 are each provided with a connecting ear 65 close to each other, a swing block 67 is rotatably mounted between the two connecting ears 65 via a rotating shaft 66, and a cavity for mounting the second friction pair 4 is opened in the swing block 67.

[0035] Specifically, by rotating any one of the movable columns 62, the fixed rod 63 inside it moves forward or backward, so that the horizontal position between the two adjustment blocks 64 changes. Under the rotational connection of the connecting ear 65, the swing block 67 is deflected, so that the second friction pair 4 is tilted according to actual needs, thereby adjusting the contact surface angle of the first friction pair 3 and the second friction pair 4 to simulate the wear state at different angles, and can simulate the wear condition of the friction pair under actual working conditions.

[0036] Reference Figure 3 A turning handle (shown in the figure but not numbered) is fixedly mounted on one end of the movable column 62 away from the second friction pair 4 , and the turning handle is located on the outer side of the L-shaped plate 61 .

[0037] Specifically, the handle is turned to drive the movable column 62 to rotate in a threaded manner, thereby changing the horizontal position of the fixed rod 63 .

[0038] Reference Figure 2 , Figure 5 A linear actuator 8 is fixedly mounted on the wall of the test bench 2, a connecting frame 9 is fixedly mounted on the telescopic end of the linear actuator 8, a shaft 10 is rotatably mounted on the connecting frame 9, and both ends of the shaft 10 extend out of the outside of the connecting frame 9, a first friction pair 3 is fixedly mounted on the middle part of the shaft 10, and a through hole 11 for assembly is opened on the first friction pair 3; a driving motor 12 is mounted on one side of the connecting frame 9 through a fixing plate, a driving wheel 13 is fixedly sleeved on the output end of the driving motor 12, a driven wheel 14 is fixedly sleeved on one end of the shaft 10, and the driving wheel 13 and the driven wheel 14 are connected by a sleeved belt transmission.

[0039] Specifically, the linear actuator 8 can be an electric push rod or a cylinder, which is not particularly limited here. As long as it can complete high-precision linear motion, it can push the first friction pair 3 to move according to first friction pairs 3 of different sizes under different test conditions, so that the first friction pair 3 contacts the surface of the second friction pair 4.

[0040] Specifically, the through hole 11 can be located at the center of the first friction pair 3, or it can be offset from the center of the first friction pair 3. The first friction pair 3 is fixedly installed in the middle of the shaft 10 through the through hole 11, and the rotation speed and rotation time of the shaft 10 are controlled by controlling the drive motor 12; when the drive motor 12 is started, the driving wheel 13 rotates accordingly, and under the transmission action of the belt, the driven wheel 14 and the shaft 10 are driven to rotate synchronously to provide a constant contact pressure friction between the first friction pair 3 and the second friction pair 4.

[0041] Example 2, reference Figure 1 - Figure 4 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: a horizontal slide groove 68 is provided in the inner cavity of the fixed rod 63, and a slide rod 69 is slidably connected in the horizontal slide groove 68, one end of the slide rod 69 is fixedly connected to the outer wall of the adjustment block 64, and an elastic member 610 is sleeved on the outer side of the slide rod 69; a threaded groove 611 is provided in the middle of the movable column 62, and a knob 612 is threadedly connected to the threaded groove 611, one end of the elastic member 610 is connected to the outer wall of the knob 612, and the other end of the elastic member 610 is rotatably connected to the outer wall of the adjustment block 64.

[0042] Specifically, the elastic member 610 is a rigid spring that can withstand axial pressure or tension.

[0043] Specifically, when the contact pressure between the first friction pair 3 and the second friction pair 4 needs to be increased, the knob 612 is rotated clockwise to move the knob 612 toward the side close to the adjustment block 64, thereby reducing the compression of the elastic member 610 to increase the contact pressure between the first friction pair 3 and the second friction pair 4; when the contact pressure between the first friction pair 3 and the second friction pair 4 needs to be reduced, the knob 612 is rotated counterclockwise to move the knob 612 away from the adjustment block 64, thereby increasing the compression of the elastic member 610 to reduce the contact pressure between the first friction pair 3 and the second friction pair 4. By changing the contact pressure, various friction and wear conditions in actual applications can be simulated. The remaining structure is the same as that of Example 1.

[0044] Example 3, reference Figure 1 - Figure 5 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: a conveying assembly 7 for conveying a medium is installed on the testing machine 1, and the conveying assembly 7 includes a conveying block 71 slidably connected to the top wall of the testing machine 1 and connected to an external pump body, and a conveying pipe 72 is installed at the bottom of the conveying block 71; the conveying pipe 72 is a metal bellows, and the bottom end outlet of the conveying pipe 72 faces between the first friction pair 3 and the second friction pair 4.

[0045] Specifically, the metal bellows is composed of multiple metal corrugations, which can expand and compress to a certain extent, have a certain bending flexibility, and their direction and angle can be adjusted according to actual needs; the use of metal bellows provides good flexibility and pressure resistance, and is suitable for conveying media containing solid particles.

[0046] Reference Figure 1 and Figure 5 A conical groove 73 is provided at the bottom of the testing machine 1 , a collecting frame 74 for collecting the medium is arranged in the conical groove 73 , and an opening matched with the collecting frame 74 is provided on the wall of the testing machine 1 .

[0047] Specifically, the conical groove 73 facilitates the introduction of the wear particles and the remaining medium generated after the test into the collection frame 74, and the collection is carried out in the collection frame 74, which is convenient for subsequent analysis and processing. The remaining structure is the same as that of the second embodiment.

[0048] Example 4, reference Figure 1 - Figure 5 , which is the fourth embodiment of the present invention. This embodiment is different from the third embodiment in that the conveying medium in the conveying block 71 is sand and gravel required by ASTM G65, the first friction pair 3 is a rubber wheel in the standard, and the second friction pair 4 is a test block size required by the standard, so that the abrasive wear test required by ASTM G65 can be carried out. The rest of the structure is the same as that of the third embodiment.

[0049] Example 5, reference Figure 1 - Figure 5 , which is the fifth embodiment of the present invention. This embodiment is different from the third embodiment in that the first friction pair 3 is a wear-resistant belt material, and the second friction pair 4 is a casing material. The friction and wear comparison evaluation test between the wear-resistant belt material and different casing materials can be evaluated to obtain test data, providing test data support for the optimization of the wear-resistant belt material. The rest of the structure is the same as that of embodiment 3.

[0050] Example 6, reference Figure 6 , which is the sixth embodiment of the present invention. This embodiment is different from the third embodiment in that the first friction pair 3 is an eccentric wheel, and by rotating the second friction pair 4, the discontinuous contact friction between the first friction pair 3 and the second friction pair 4 can be achieved, thereby achieving impact friction or impact friction. The rest of the structure is the same as that of the third embodiment.

[0051] Example 7, reference Figure 1 - Figure 5, which is the seventh embodiment of the present invention. This embodiment is different from the third embodiment in that the first friction pair 3 is made of drill pipe joint wear-resistant belt material, the second friction pair 4 is made of drill pipe joint material, and the conveying medium in the conveying block 71 is mud, which can simulate the friction and wear of the drill pipe joint when it is eccentrically worn under drilling conditions. The rest of the structure is the same as that of embodiment 3.

[0052] Embodiment 8, Figure 1 - Figure 5 , which is the eighth embodiment of the present invention. This embodiment is different from the third embodiment in that the first friction pair 3 uses the drill pipe joint wear-resistant belt material, and the second friction pair 4 uses different rocks, so that the friction and wear between the drill pipe joint and the well wall rock under drilling conditions can be simulated and evaluated. The rest of the structure is the same as that of the third embodiment.

[0053] Example 9, reference Figure 1 - Figure 5 , which is the ninth embodiment of the present invention. This embodiment is different from the third embodiment in that the first friction pair 3 is a hard alloy material, and the second friction pair 4 is a glass plate. Through the friction and wear test, the wear of the hard alloy during precision machining of glass is studied. The rest of the structure is the same as that of the third embodiment.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable friction and wear testing device, characterized in that: The invention comprises a testing machine (1), wherein a testing platform (2) is fixedly installed in an inner cavity of the testing machine (1), a first friction pair (3) is arranged on one side of the testing platform (2), and a second friction pair (4) is arranged on the other side of the testing platform (2), the first friction pair (3) is in contact with the surface of the second friction pair (4), the top of the testing platform (2) is slidably connected with a base (5), and an adjustment component (6) for adjusting the second friction pair (4) is arranged on the base (5); The adjustment assembly (6) comprises an L-shaped plate (61) fixedly mounted on the top of the base (5), a movable column (62) being threadedly connected to the L-shaped plate (61), and two movable columns (62) are stacked and arranged, a fixed rod (63) is rotatably mounted inside the movable column (62), an adjustment block (64) is arranged on the side of the fixed rod (63) close to the first friction pair (3), the two adjustment blocks (64) are each provided with a connecting ear (65) on one side close to each other, a swing block (67) is rotatably mounted between the two connecting ears (65) via a rotating shaft (66), and a cavity for mounting the second friction pair (4) is provided in the swing block (67).

2. The adjustable friction and wear testing device according to claim 1, characterized in that: A turning handle is fixedly mounted on one end of the movable column (62) away from the second friction pair (4), and the turning handle is located outside the L-shaped plate (61).

3. The adjustable friction and wear testing device according to claim 1, characterized in that: The inner cavity of the fixed rod (63) is provided with a horizontal slide groove (68), and a slide rod (69) is slidably connected in the horizontal slide groove (68). One end of the slide rod (69) is fixedly connected to the outer wall of the adjustment block (64), and an elastic member (610) is sleeved on the outer side of the slide rod (69).

4. The adjustable friction and wear testing device according to claim 3, characterized in that: A thread groove (611) is provided in the middle of the movable column (62), a knob (612) is threadedly connected to the thread groove (611), one end of the elastic member (610) is connected to the outer wall of the knob (612), and the other end of the elastic member (610) is rotatably connected to the outer wall of the adjustment block (64).

5. The adjustable friction and wear testing device according to claim 1, characterized in that: The testing machine (1) is provided with a conveying assembly (7) for conveying a medium, the conveying assembly (7) comprising a conveying block (71) slidably connected to the top wall of the testing machine (1) and connected to an external pump body, and a conveying pipe (72) is installed at the bottom of the conveying block (71).

6. The adjustable friction and wear testing device according to claim 5, characterized in that: The delivery pipe (72) is a metal bellows, and the bottom outlet of the delivery pipe (72) faces between the first friction pair (3) and the second friction pair (4).

7. The adjustable friction and wear testing device according to claim 5, characterized in that: The bottom of the testing machine (1) is provided with a conical groove (73), a collecting frame (74) for collecting the medium is arranged in the conical groove (73), and an opening matched with the collecting frame (74) is provided on the wall of the testing machine (1).

8. The adjustable friction and wear testing device according to claim 1, characterized in that: A linear actuator (8) is fixedly mounted on the wall of the test bench (2); a connecting frame (9) is fixedly mounted on the telescopic end of the linear actuator (8); a shaft (10) is rotatably mounted on the connecting frame (9), and both ends of the shaft (10) extend out of the outside of the connecting frame (9); the first friction pair (3) is fixedly mounted on the middle part of the shaft (10); and a through hole (11) for assembly is provided on the first friction pair (3).

9. The adjustable friction and wear testing device according to claim 8, characterized in that: A driving motor (12) is mounted on one side of the connecting frame (9) via a fixing plate, a driving wheel (13) is fixedly sleeved at the output end of the driving motor (12), a driven wheel (14) is fixedly sleeved at one end of the shaft (10), and the driving wheel (13) and the driven wheel (14) are connected via a sleeved belt transmission.

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