CN1595100A - Reciprocal and rotary type incorporated frictional wear test machine - Google Patents

Abstract

The invention discloses two reciprocating and rotating integrated friction and wear testing machines, including a base, a reciprocating mechanism, a rotating mechanism and an upper sample control device, wherein the reciprocating mechanism includes a reciprocating drive motor, a slider, a slide rail, Crank and connecting rod; the rotary mechanism includes a rotary drive motor and a rotating disc; the upper sample control device includes elastic arms, guide rails and sliding supports or includes elastic arms, rotating parts and bases. The present invention combines the compound friction and wear testing machine and the rotary friction and wear testing machine into an integrated structure through the specially designed base and upper sample control device. During the experiment, there is no need to disassemble and assemble the sample, and the use is stable and reliable, which ensures the accuracy of the experimental data and reduces the workload of the experimenters.

Description

Reciprocating and rotating integrated friction and wear testing machine

technical field

The invention relates to a friction and wear testing machine, in particular to a reciprocating and rotating integrated friction and wearing testing machine.

Background technique

No matter the existing friction and wear testing machine is a reciprocating testing machine or a rotating testing machine, only a single friction and wear test can be performed. When two kinds of friction and wear tests are required, two testing machines must be set accordingly. It not only increases the equipment investment, but also increases the space occupied by the equipment, and also makes the whole experimental process cumbersome and lengthy, increasing the workload of the experimenters.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a reciprocating and rotating integrated friction and wear testing machine that can perform two kinds of friction and wear experiments on the same sample, and does not need to disassemble the sample during the experiment.

In order to achieve the above object, a reciprocating and rotating integrated friction and wear testing machine of the present invention includes a base, a reciprocating mechanism, a rotating mechanism and an upper sample control device, wherein the reciprocating mechanism includes a driving device, a slide block, a slide Rail, crank, connecting rod. The crank is installed on the output shaft of the drive device and connected with the slider through the connecting rod. The slide rail is fixed on the base horizontally. The slider moves reciprocatingly along the slide rail under the drive of the drive device. There is a lower sample installation slot; the rotary mechanism includes a driving device, a support, and a rotating disk. The rotation axis of the rotating disk is set vertically; the upper sample control device includes an elastic arm and a base, the base is fixed on the base, and the base is provided with a support that can rotate around its vertical axis. One end is rotatably installed on the support through a horizontal shaft, and the other end of the elastic arm is provided with a sample fixture and a weight support. There is a locking device between the piece and the base.

To achieve the above object, another reciprocating and rotating integrated friction and wear testing machine of the present invention includes a base, a reciprocating mechanism, a rotating mechanism and an upper sample control device, wherein the reciprocating mechanism includes a driving device, a slider, Slide rail, crank, connecting rod. The crank is installed on the output shaft of the drive device and connected with the slider through the connecting rod. The slide rail is fixed on the base horizontally. The slider reciprocates along the slide rail under the drive of the drive device. There is a lower sample installation slot on the top; the rotary mechanism includes a driving device, a support, and a rotating disk. The device is driven to rotate, and the rotation axis of the rotating disk is vertically set; the upper sample control device includes an elastic arm, a sliding support, and a base, and the base is fixed on the base, and a guide rail is arranged on it, and the guide rail is perpendicular to the reciprocating The movement direction of the mechanism is set. The sliding support can be slidably installed on the guide rail on the base. One end of the elastic arm is rotatably installed on the sliding support through a horizontal axis. The other end of the elastic arm is provided with a sample fixture and a weight support. The track of the fixture when it moves with the sliding support passes through the top of the rotating disc on the rotary mechanism, and a locking device is arranged between the guide rail and the sliding support.

Further, a scale is provided on the guide rail.

Further, the crank is provided with a plurality of pin holes for fixing the connecting rod with different gyration radii, and the movement stroke of the slider of the reciprocating mechanism can be adjusted through the pin holes.

Further, the lower sample mounting groove on the slider of the reciprocating mechanism has an oil discharge hole, and a control valve is arranged at the oil discharge hole; the rotating disc of the rotary mechanism is in a shallow cup shape, Positioning holes are arranged on its side walls.

Further, an oil retaining sleeve is arranged on the periphery of the rotating disk of the rotary mechanism, and the oil retaining sleeve is fixed on the base, and an oil discharge hole is opened at the bottom of the oil retaining sleeve.

Further, the base is provided with a friction lubrication oil supply device, including an oil cup and an oil pipe. The oil cup has a certain height, and the oil pipe supplies oil to the downward sample installation groove and the rotating disk. The oil pipe is provided with an adjustment control valve. .

The present invention combines the compound friction and wear testing machine and the rotary friction and wear testing machine into an integrated structure through the specially designed base and upper sample control device. During the experiment, there is no need to disassemble and assemble the sample, and the use is stable and reliable, which ensures the accuracy of the experimental data.

Description of drawings

Figure 1 is a schematic diagram of reciprocating friction;

Fig. 2 is a schematic diagram of rotary friction;

Fig. 3 is the structural representation of first kind of experimental machine of the present invention;

Fig. 4 is a top view structural schematic diagram of Fig. 3;

Fig. 5 is a structural schematic diagram of opening a mounting groove on the slider of the reciprocating mechanism;

Fig. 6 is the B direction view of Fig. 5;

Fig. 7 is a schematic diagram when adjusting the elastic arm;

Figure 8 is a cross-sectional view when carrying out a reciprocating friction test;

Fig. 9 is a structural schematic diagram of a rotating disk of a rotary mechanism;

Fig. 10 is the A-A view of Fig. 9;

Figure 11 is a partial schematic view of the rotary mechanism;

Fig. 12 is a schematic top view when a gap is left on the base;

Fig. 13 is the structural representation of the reciprocating friction experiment carried out by the second experimental machine;

Fig. 14 is a schematic diagram of the structure of the second experimental machine for rotating friction experiments.

Detailed ways:

As shown in Figure 1, it is a schematic diagram of reciprocating friction. The upper sample 1 is fixed, and the lower sample 2 is reciprocating horizontally. Figure 2 is a schematic diagram of rotary friction. A certain normal load N is applied to the sample 1 and the upper sample 3, and the friction force F is generated during friction. Its magnitude is determined by F=N*f, and f is the friction coefficient. The results measured between the pairs are comparable. The so-called "same working condition" refers to the same friction mode, the same normal load, the same speed, the same stroke and the same lubrication conditions.

The first kind of testing machine shown in Figure 3 and Figure 4, the whole testing machine consists of a base 10, a reciprocating mechanism, a rotary mechanism and an upper sample control device, wherein the reciprocating mechanism consists of a reciprocating drive motor 5, a slider 6. The slide rail 7 is composed of a crank connecting rod. The crank connecting rod includes a disc 8 and a connecting rod 9. The reciprocating drive motor 5 drives the disc 8 to move. The disc 8 is connected to the connecting rod 9 in rotation. The connecting rod 9 and the slider 6 The slider 6 reciprocates under the drive of the reciprocating drive motor 5. When in use, the connecting rod 9 and the slider 6 move along the plane. The disc 8 is provided with crank pin holes 13 with multiple crank radii. By using different The crank pin hole 13 can adjust the stroke of the reciprocating mechanism. In order to prevent the plane from jumping during the test, the slide rail 7 is fixed to the base 10 and parallel to the upper surface of the base 10. During processing, the plane runout of the slide block 6 must be ensured to be less than 0.1 mm. The slide rail 7 can be a rolling guide rail, which can be Reduce frictional resistance and improve test accuracy. The specific structure of the mounting groove on the slide block 6 is shown in Figure 10 and Figure 11. The slide block 6 is provided with a mounting groove for the lower sample, and the wall of the mounting groove is provided with a threaded hole 11 for fastening the lower sample and an unloading socket. Oil hole 12, when in use, put the lower sample into the installation groove, and then clamp the lower sample from both ends with set screws. The sample is tightened and fixed.

The rotary mechanism is made up of a rotary drive motor 16 and a rotary disc 17. The rotating shaft of the rotary drive motor 16 is perpendicular to the rotary disc 17 and is coaxially fixed with the rotary disc 17. The surfaces are parallel, and the center of the rotating disk 17 is roughly located on the vertical bisector of the slide rail 7 of the reciprocating mechanism, which facilitates positioning during operation.

The upper sample control device is composed of a guide rail 18, a sliding support 19 and an elastic arm 20. The guide rail 18 is arranged perpendicular to the moving direction of the reciprocating mechanism. A scale 21 is installed on the guide rail 18 to facilitate the precise positioning of the sliding support 19. The sliding support 19 is arranged on the guide rail 18, and can move back and forth along the groove of the guide rail 18. A sliding locking device is arranged between the guide rail 18 and the sliding support 19. After moving to a predetermined position, the elastic arm 20 can be locked. One end of the arm 20 is hinged to the sliding support 19 through a rotating shaft, and the other end is provided with a clamp for clamping the upper sample. The upper part of the clamp is provided with a post for placing weights. In the experiment, different loads are applied by means of It is achieved by changing the mass of the weight, and the clamping center of the fixture is also roughly located on the vertical bisector of the upper slide rail 7 of the reciprocating mechanism, so as to facilitate adjustment and positioning. The reciprocating drive motor 5 and the rotary drive motor 16 are both arranged in the base 10 .

As shown in Figures 7 and 8, after the rotary friction test is completed, the elastic arm 20 is first lifted, and then moved forward along the guide rail until the top of the elastic arm clamps the position of the upper sample and the lower sample. Correspondingly, the two are in contact, and then the sliding support and the guide rail are locked, and the reciprocating friction test is carried out by weight loading.

The required experimental parameters can be measured by attaching strain gauges on the elastic arm 20. When the elastic arm clamps the sample end, a reciprocating or rotating mechanism is selected for relative movement. A dynamic strain tester is installed in the friction experiment to measure the friction generated. Strain, the coefficient of friction value can be obtained by calculation.

In the friction experiment, there are mainly three kinds of lubrication conditions: dry friction, dripping oil lubrication and full lubrication. For this reason, the present invention can also be equipped with a friction lubrication oil supply device as shown in Fig. 3 and Fig. 4, consisting of oil cup 22 and Composed of oil pipe 23, matched with the oil supply device, the rotating disk of the rotary mechanism adopts the structure shown in Figure 9 and Figure 10, the rotating disk is formed into a shallow cup shape, and positioning holes 24 are arranged on the side wall, such as As shown in Figure 11, the bearing of rotating disc 26 becomes double sleeve shape, and its inner sleeve 29 cooperates with the rotating shaft of rotating disc, and the diameter and height of outer sleeve 25 are all greater than rotating disc 26, and its top is inward Bending, to prevent the lubricating oil from splashing during the rotation process, the bottom of the bearing has an oil unloading through hole 27, and the oil is sealed between the rotating shaft and the base. The oil cup 22 has a certain height, and the two oil outlets of the oil pipe 23 communicate with the lower sample installation groove and the inner cavity of the rotating disc respectively, and the oil pipe 23 is provided with a regulating control valve.

Since the reciprocating mechanism and the rotating mechanism are staggered by a certain distance, the base of the present invention can be designed as the structure shown in Figure 12, which not only saves manufacturing materials, but also facilitates the operation station.

As shown in Figure 13 and Figure 14, the second type of testing machine has the same reciprocating mechanism and rotary mechanism as the first type of testing machine. Part 30 is rotatably installed on the rotating support 31, and the rotating support is installed on the base 32. The elastic arm 33 is installed on the rotating member 30 through the rotating shaft or rotating joint. Between the rotating member 30 and the rotating support 31, there is Angle locking device, the rotating disc 33 of the rotary mechanism is arranged on the rotation track of the clamping center of the fixture, so that the position of the upper sample on the rotating disc relative to the center of the circle can be easily adjusted to carry out different rotational friction experiments.

Claims (7)

1. A reciprocating and rotating integrated friction and wear testing machine is characterized in that it includes a base, a reciprocating mechanism, a rotating mechanism and an upper sample control device, wherein the reciprocating mechanism includes a driving device, a slider, and a slide rail , crank, connecting rod, the crank is installed on the output shaft of the drive device and connected with the slider through the connecting rod, the slide rail is fixed on the base horizontally, the slider is driven by the drive device to reciprocate along the slide rail, and the slider opens There is a lower sample installation slot; the rotary mechanism includes a driving device, a support, and a rotating disk. It is driven to rotate, and the rotation axis of the rotating disc is set vertically; the upper sample control device includes an elastic arm and a base, the base is fixed on the base, and the base is provided with a support that can rotate around its vertical axis, and one end of the elastic arm It is rotatably installed on the support through a horizontal shaft, and the other end of the elastic arm is provided with a sample fixture and a weight support. The track of the sample fixture when it rotates with the support passes through the top of the rotating disc on the rotary mechanism, and the support There is a locking device between the base and the base. 2. A reciprocating and rotating integrated friction and wear testing machine, characterized in that it includes a base, a reciprocating mechanism, a rotating mechanism and an upper sample control device, wherein the reciprocating mechanism includes a driving device, a slider, and a slide rail , crank, connecting rod, the crank is installed on the output shaft of the drive device and connected with the slider through the connecting rod, the slide rail is fixed on the base horizontally, the slider is driven by the drive device to reciprocate along the slide rail, and the slider opens There is a lower sample installation slot; the rotary mechanism includes a driving device, a support, and a rotating disk. It is driven to rotate, and the rotation axis of the rotating disk is set vertically; the upper sample control device includes an elastic arm, a sliding support, and a base, and the base is fixed on the base, and a guide rail is arranged on it, and the guide rail moves perpendicular to the reciprocating mechanism Direction setting, the sliding support can be slidably installed on the guide rail on the base, one end of the elastic arm can be rotatably installed on the sliding support through a horizontal axis, the other end of the elastic arm is provided with a sample fixture and a weight support, and the sample fixture is The trajectory of the sliding support passes through the top of the rotating disc on the rotary mechanism, and a locking device is arranged between the guide rail and the sliding support. 3. A reciprocating and rotating integrated friction and wear testing machine as claimed in claim 2, wherein a scale is arranged on the guide rail. 4. A reciprocating and rotating integrated friction and wear testing machine as claimed in claim 2, characterized in that the crank is provided with a plurality of pin holes for fixed connecting rods with different radii of gyration, through which pin holes The movement stroke of the slider of the reciprocating mechanism can be adjusted. 5. A reciprocating and rotating integrated friction and wear testing machine as claimed in claim 2, characterized in that the lower sample mounting groove on the slider of the reciprocating mechanism has an oil discharge hole, and the oil discharge A control valve is arranged at the hole; the rotating disk of the rotary mechanism is in a shallow cup shape, and a positioning hole is arranged on its side wall. 6. A reciprocating and rotating integrated friction and wear testing machine according to claim 2, characterized in that an oil retaining sleeve is arranged on the periphery of the rotating disk of the rotary mechanism, and the oil retaining sleeve is fixed on On the said support, an oil discharge hole is opened at the bottom thereof. 7. A reciprocating and rotating integrated friction and wear testing machine as claimed in claim 2, characterized in that, the base is provided with a friction lubrication oil supply device, including an oil cup and an oil pipe, and the oil cup has a certain height , the oil pipe goes down to the sample installation groove and the rotating disc to supply oil, and the oil pipe is provided with an adjustment control valve.

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