A high temperature wear resistance testing machine

Abstract

The invention discloses a high-temperature wear-resistant testing machine, which belongs to the field of wear-resistant experimental equipment, and includes a mounting frame for rotatably mounting a roller, a roller parallel to the roller is provided above the roller, a heating component for heating the roller is provided in the roller, and both ends of the roller mandrel are rotatably mounted in the bearing seat, and the bearing seat is vertically slidably mounted in the mounting frame and connected to a pressure component, the pressure component makes the bearing seat slide down to the position where the roller and the heating component always keep rolling contact, and the pressing force applied by the pressure component to the roller through the bearing seat can be adjusted; one end of the mandrel is transmission-connected to a driving device capable of detecting the number of revolutions and installed vertically and slidably, the driving device drives the mandrel and the roller to rotate synchronously together, and when the roller to be tested is worn to a set degree, the driving device stops and records the number of revolutions that have been rotated at this time. The testing machine recorded in the invention can simulate the working state of the roller more realistically, and thus simply and effectively test the wear resistance of the device.

Description

Technical Field

[0001] The invention relates to wear-resistant test equipment, in particular to a high-temperature wear-resistant test machine. Background Art

[0002] In the production process of hot-rolled steel, rollers are a very important component, which is mainly used to support and guide the transmission movement of steel such as steel strips. The use of rollers can effectively reduce the friction of steel in the production process, improve production efficiency, and also ensure the quality of steel.

[0003] In actual production, there are many ways to use rollers. The most common method is to install rollers at the exit of the rolling mill to support and guide the movement of steel. In addition, rollers can also be used to adjust the tension of steel to prevent special steels such as steel strips from becoming loose or tight during the production process. Therefore, in production practice, the maintenance and care of rollers is also very important. Regularly check the wear of rollers and replace severely worn rollers in time to ensure the smooth progress of the production process.

[0004] In order to study, design or maintain rollers, technicians in this field have specially designed a series of roller wear resistance test equipment to study how to improve the wear resistance of rollers during the production process, or to design high wear resistance at the beginning of the design, such as using special steel, or nesting special inlays, or performing special surface treatments. These existing experimental equipment either directly designs an equivalent production line, or simply occupies the workshop production line for testing, that is, the roller needs to be installed on a specific production line for testing, and the corresponding steel is allowed to shuttle through to detect the wear resistance of the roller. However, in practice, it is unreliable and even dangerous to directly use rollers with immature designs in actual production, and it is strictly dependent on production planning and arrangements, which has great constraints on the development of rollers. In addition, the evaluation of the wear resistance of rollers only stays on the evaluation of the wear condition of the wear-resistant layer, and there is a lack of intuitive basis for the production matching of specific steels. Summary of the invention

[0005] In view of the above introduction to the current state of the art, the purpose of the present invention is to provide a high temperature wear-resistant testing machine to better solve a series of problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, a high-temperature wear-resistant testing machine of the present invention includes a mounting frame for rotatably mounting a roller, a roller parallel to the roller is provided above the roller, a heating component for heating the roller is provided in the roller, both ends of the core shaft of the roller are rotatably mounted in the bearing seat respectively, the bearing seat is vertically slidably mounted in the mounting frame, and is connected to a pressure component, the pressure component enables the bearing seat to slide down to a position where the roller and the heating component always maintain rolling contact, and the extrusion force applied by the pressure component to the roller through the bearing seat can be adjusted; one end of the core shaft is transmission-connected to a vertically slidably mounted driving device capable of detecting the number of revolutions, the driving device drives the core shaft and the roller to rotate synchronously together, and when the roller to be tested is worn to a set degree, the driving device stops and records the number of revolutions that have been rotated at this time.

[0007] Furthermore, the interior of the drum is a hollow structure, and the heating assembly includes an electric heating tube spirally wound axially along the inner wall of the drum, the electric heating tube extends into one end of the core shaft without contact, and the end extending into the core shaft is a cylindrical structure with an increased diameter, the outside of the cylindrical structure is coaxially provided with an insulating protective sleeve that is in rotational contact with the core shaft, the insulating protective sleeve is fixedly embedded in the axial direction of the core shaft, and is coaxially fixed to an insulating flange pipe that passes through the end of the core shaft, and the power cord of the electric heating tube passes through the flange pipe and extends out of the end of the core shaft.

[0008] Furthermore, the mounting frame includes relatively arranged support plates, the upper portion of the support plates having a vertically arranged rectangular groove, in which a first rectangular bearing seat is vertically slidably mounted; and the lower portion of the support plates has a second bearing seat for mounting the roller shaft of the roller embedded and fixed therein.

[0009] Furthermore, a mounting plate is fixed obliquely at the lower position of one side of each of the two support plates, and the inclination direction of the mounting plate is in one of the diameter directions of the roller, and the two mounting plates are relatively arranged outside the two ends of the roller, and a strip sliding hole is provided on the mounting plate along its inclination direction, and the strip sliding hole is used for rolling installation of a rotating shaft of a smooth roller body and sliding installation along the strip groove, and the rotating shaft and the smooth roller body are coaxially fixed as a whole;

[0010] A cantilever is also fixed to one side of the free end of the mounting plate, the cantilever is located on the symmetry axis in the tilting direction of the mounting plate, and one end of the cantilever extends to a position directly opposite to the strip-shaped sliding hole, and a liquid storage tank for containing conductive liquid is provided on the surface of the cantilever directly opposite to the strip-shaped sliding hole;

[0011] A through hole is provided in the axial direction of the rotating shaft, and the end face of the rotating shaft is in sliding contact and connection with the surface of the cantilever facing the strip sliding hole in a dynamic sealing manner. In the initial state, the opening of the through hole is located in the liquid storage tank, and the driving device is kept powered on. When the surface of the roller to be tested is worn to a set degree, the smooth roller body slides down to the position where the opening leaves the liquid storage tank, and the driving device is in a power-off and stopped state.

[0012] Furthermore, the liquid storage tank is a rectangular strip groove, the strip groove is extended along the inclined direction of the cantilever, and the through hole is a rectangular hole.

[0013] Furthermore, an insulating piston plate is slidably installed in the liquid storage tank along its inclined direction. The piston plate is screwed into the free end of the cantilever in cooperation with the thread and reaches an adjusting screw in the liquid storage tank for rotational cooperation, and a pressure spring which is always in a compressed state is sleeved on the adjusting screw between the piston plate and the liquid storage tank.

[0014] Furthermore, a conductive pin is fixed to the bottom of the liquid storage tank, one end of the conductive pin is sleeved with an insulating sleeve, and the insulating sleeve passes through the bottom of the liquid storage tank.

[0015] Furthermore, the pressure-applying assembly includes, from top to bottom, a clamping bolt, a mounting seat, a pressure-resistant spring, a sliding block, a pressure sensing element and a contact plate, wherein the clamping bolt is threadedly screwed into the mounting frame and abuts against the mounting seat, the mounting seat has a concave cavity at the bottom, the pressure-resistant spring is installed in the concave cavity, the bottom end of the pressure-resistant spring is connected to the sliding block slidably installed in the concave cavity, the sliding block is connected to the contact plate through the pressure sensing element, and the contact plate is located on the top surface of the bearing seat.

[0016] Furthermore, the pressure-applying assembly includes a cylinder whose pressure of the input compressed gas can be adjusted, and a telescopic shaft of the cylinder vertically slides through the top end of the mounting frame and then contacts the bearing seat.

[0017] Furthermore, the driving device is a motor, one end of which is installed in a vertical guide groove on the stand in a vertical sliding manner through a guide block.

[0018] Beneficial effects: The present invention does not need to be tested on the actual production line, so it will not delay production progress, and does not need to rely on production schedules. The test is efficient and reliable, and can be tested at any time. It uses heated rollers to simulate the wear of long steel on rollers during transmission. The structure is compact and easy to actually make and manage and maintain, and it has the ability to achieve special testing and research on one type of steel and one type of roller. In addition, the present invention can directly correlate the specific wear resistance of the roller, such as the specific wear thickness, with the specific steel transmission length, so that the research and production of the roller can directly match the specific steel order quantity requirements, which is very scientific and reasonable.

[0019] It can be seen that the high temperature wear-resistant testing machine in the present invention has a simple and compact structure, can be independently set based on test conditions such as steel weight and length, can flexibly and realistically simulate the working state of the roller, and can conduct targeted research and testing independent of the actual production plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following are auxiliary illustrations for explaining some specific embodiments of the present invention. The drawings described are mainly the principles of the specific operation execution structures or methods of some embodiments of the present invention. However, this does not mean that the physical structure or operation steps of the present invention can only be as shown in the drawings.

[0021] Figure 1 It is a side view of one embodiment of the present invention;

[0022] Figure 2 It is a front view of the contact between the roller and the drum;

[0023] Figure 3 The figure is a structural diagram of the installation of the end of the electric heating tube at the end of the core shaft;

[0024] Figure 4 for Figure 1 The enlarged structure diagram at M in FIG.

[0025] Figure 5 for Figure 4 The structural diagram after the cantilever section is removed;

[0026] Figure 6 for Figure 4 The enlarged structure diagram at K in FIG.

[0027] Figure 7 for Figure 6 a rear view of the structure shown;

[0028] Figure 8 A side view of another embodiment of the present invention;

[0029] Fig. 9 This is an installation structure diagram of the drive equipment.

[0030] Component number description: test roller 1, roller shaft 101, roller 2, core shaft 201, mounting frame 3, electric heating tube 4, columnar structure 5, thermal insulation protection cover 6, flange pipe 7, power cord 8, first bearing seat 901, second bearing seat 902, clamping bolt 10, mounting seat 11, pressure-resistant spring 12, sliding block 13, pressure sensing element 14, contact plate 15, mounting plate 16, cantilever 17, strip sliding hole 18, smooth roller body 19, rotating shaft 20, perforation 21, liquid storage tank 22, piston plate 23, pressure spring 24, adjusting screw 25, insulating sleeve 26, conductive pin 27, cylinder 28, telescopic shaft 29, driving device 30, guide block 31, guide groove 32, stand 33. DETAILED DESCRIPTION

[0031] The embodiments of the present invention will be fully described below, and some core features of the embodiments will be specifically shown in the accompanying drawings, wherein the same or similar reference numerals in the drawings represent the same or similar technical features, or structures or steps or processes with similar functions. Other embodiments replaced by ordinary technicians based on these embodiments without the need for creative work also belong to the protection scope of the present invention.

[0032] See also Figure 1 The high temperature wear test machine mainly includes a mounting frame for rotating and mounting the roller, and a roller 2 is arranged above the roller and parallel to the roller. The roller 2 is provided with a heating component for heating the roller 2 to heat the roller 2 to a set temperature range and maintain it, simulating the working state of high temperature steel plates and other steel materials moving on the roller during production in a hot rolling steel plant. The roller rotates and rolls due to the forward movement of the steel materials. Specifically, the two ends of the core shaft 201 of the roller 2 are respectively rotatably mounted in the bearing seat, such as Figure 1 The bearing seat is vertically slidably mounted in the mounting frame 3 and connected to a pressure component. The pressure component simulates the weight of the steel and combines the high temperature of the roller 2 to truly simulate the conveying process during the production of hot-rolled steel, so that the roller is in a working state as realistically as possible. Figure 1As shown, the pressure assembly enables the bearing seat to slide down to the position where the roller 2 and the heating assembly always maintain rolling contact, so the above-mentioned bearing seat, such as the first bearing seat 901, is vertically slidably installed and is not fixedly installed in a fixed position. In addition, the extrusion force applied by the pressure assembly to the roller 2 through the bearing seat can be adjusted to simulate the positive extrusion force on the roller, that is, to simulate the friction and wear of the roller when different steels are transmitted on the roller. In this embodiment, one end of the mandrel 201 used is connected to the driving device 30 that is vertically slidably installed and can detect the number of revolutions, that is, the number of revolutions of the driving device 30, or the number of revolutions of the roller 2 is detected, and the driving device 30 drives the mandrel 201 and the roller 2 to rotate synchronously together, and when the roller 1 to be tested is worn to a set degree, the driving device 30 stops immediately, the test of the roller is terminated, and the number of revolutions that the driving device 30 has rotated at this time is recorded.

[0033] In the specific production, the drum 2 of this embodiment has a hollow structure inside, and the heating assembly includes electric heating tubes 4 spirally wound along the inner wall of the drum 2. These electric heating tubes 4 provide heat for the drum 2 to increase the temperature of the drum 2. The material of the drum 2 can be made according to the steel of a specific steel production line to simulate the production and transportation of steel. Figure 2-Figure 3 , the electric heating tube 4 extends into one end of the core shaft 201 without contact, that is, the end of the electric heating tube 4 does not contact the end of the core shaft 201. At the same time, the end of the electric heating tube 4 in this embodiment that extends into the core shaft 201 is a cylindrical structure 5 with an increased diameter. The outside of this cylindrical structure 5 is coaxially provided with an insulating protective sleeve 6 that is in rotational contact with it, so as to prevent heat from being directly transferred to the end of the core shaft 201 and to try to dissipate heat in the internal area of ​​the drum 2. The insulating protective sleeve 6 is fixedly embedded in the axial direction of the core shaft 201 and is coaxially fixed to an insulated flange pipe 7 that passes through the end of the core shaft 201. The power cord 8 of the electric heating tube 4 passes through the flange pipe 7 and extends out of the end of the core shaft 201, so as to achieve interference-free threading installation of the electric heating tube 4.

[0034] like Figure 1 The mounting frame 3 of this embodiment includes two front and rear support plates arranged relatively to each other, and the upper part of the support plate has a vertically arranged rectangular groove, in which a rectangular first bearing seat 901 is vertically slidably installed, that is, the first bearing seat 901 can move freely on the support plate to ensure that the roller 2 can fully roll in contact with the roller to be tested, and correspondingly, a second bearing seat 902 for mounting the roller shaft 101 of the roller is embedded and fixed in the lower part of the support plate, so that the roller keeps rotating in place, and the roller 2 is relied on to adjust the state of friction contact between the two.

[0035] As one of the most important structural designs, Figure 1 and Figure 4-5In this embodiment, a mounting plate 16 is specially fixed at a lower position on one side of the two support plates, and the mounting plate 16 is tilted in one of the diameter directions of the roller. The two mounting plates 16 are relatively arranged outside the two ends of the roller. In addition, a strip sliding hole 18 is provided on the mounting plate 16 along its tilting direction. The strip sliding hole 18 is provided for the rotating shaft 20 of a smooth roller body 19 to be rolled and installed along the strip groove. The rotating shaft 20 and the smooth roller body 19 are coaxially fixed as a whole, and can be integrally formed during specific production. In use, the reason why the mounting plate 16 is tilted in one of the diameter directions of the roller and the mounting plate 16 is provided with a strip sliding hole 18 along its tilting direction is mainly to enable the smooth roller body 19 to move with it when the surface of the roller is worn, and the displacement in the moving direction is considered to be equal to the wear amount of the roller. On the basis of the above structure, a cantilever 17 needs to be fixed on one side of the free end of the mounting plate 16. The cantilever 17 is located on the symmetry axis in the tilting direction of the mounting plate 16, and one end of the cantilever 17 extends to the position directly opposite the strip sliding hole 18. At the same time, a through hole 21 must be provided in the axial direction of the rotating shaft 20, and the end face of the rotating shaft 20 is in dynamic sealing and sliding contact with the surface of the cantilever 17 facing the strip sliding hole 18. In other words, the above structural design can be made so that the corresponding part of the cantilever 17 can be covered in close contact with the opening of the strip sliding hole 18 during specific production, and when the end face of the rotating shaft 20 is flush with the opening, that is, the cantilever 17 is essentially for covering the end face of the cantilever 17, so that the surface of the cantilever 17 facing the strip sliding hole 18 is provided with a liquid storage tank 22 for accommodating the conductive liquid, which is in dynamic sealing contact with the end face of the rotating shaft 20, and the liquid storage tank 22 is sealed to form a complete groove such as a rectangle to store the conductive liquid; and in practice, it is required that the end face of the rotating shaft 20 is always in contact with the surface of the cantilever 17 to maintain the closedness of the liquid storage tank 22 and prevent the conductive liquid from leaking out.

[0036] In actual use, before or at the beginning of the test, that is, in the initial state, the opening of the through hole 21 is located in the liquid storage tank 22, and the driving device 30 is kept powered on. Here, it is specifically and figuratively considered that: the conductive liquids in the two liquid storage tanks 22 are respectively two nodes of a certain wire in a circuit, and the columnar conductive liquid column contained in the through hole 21 is equivalent to a connecting wire. When the connecting wire is connected to the two nodes, the corresponding circuit is turned on. Therefore, in the above structural design, it is required that when the surface of the roller 1 to be tested is worn to a set degree, the smooth roller body 19 slides down to the position where the orifice leaves the liquid storage tank 22, which is equivalent to the two ends of the above-mentioned wire being disconnected from the two nodes, and the above-mentioned circuit is in an open circuit state, and this circuit is a power supply circuit or a control circuit for controlling the rotation of the drive device 30, that is, the drive device 30 is in a power-off and stopped state, so as to achieve the purpose of immediately stopping the drive device 30 once the wear degree of the roller 1 to be tested reaches the set degree. At this time, according to the number of revolutions of the drive device 30, that is, directly or indirectly (if there is a speed change mechanism transmission) corresponding to the number of revolutions of the roller 2, then this number of revolutions multiplied by the circumference of the roller 2 is equal to the length of the hot-rolled steel transmitted on the roller. In this way, the transmission capacity of the roller corresponding to the specific steel model (limited to the specific weight and length, etc.) is simply and clearly obtained, and then more accurate and intuitive reference data is provided for the design and use of the roller.

[0037] Specifically in this embodiment, Figure 6-Figure 7 As shown, the liquid storage tank 22 is a rectangular strip groove, which is extended along the tilt direction of the cantilever 17. That is, combined with the above structure, it actually moves along a certain radial direction of the roller, and the corresponding perforation 21 is a rectangular hole, so as to cooperate with the rectangular liquid storage tank 22 to control the on and off of the circuit.

[0038] In practice, since the roller wear amount is sometimes required to be very small and sometimes very large, in order to adapt to this range, in this embodiment, Figure 6-Figure 7 As shown, an insulating piston plate 23 is slidably installed in the liquid storage tank 22 along its inclined direction. The piston plate 23 is screwed into the free end of the cantilever 17 in cooperation with the thread and reaches an adjusting screw 25 in the liquid storage tank 22 for rotational cooperation. In addition, a pressure-bearing spring 24 which is always in a compressed state is sleeved on the adjusting screw 25 between the piston plate 23 and the liquid storage tank 22, so that the piston plate 23 is always in a relatively stable state and is not easy to move at will. The movement of the piston plate 23 changes the displacement range of the above-mentioned through hole 21 when it remains connected with the liquid storage tank 22 during the movement.

[0039] The liquid storage tank 22 in the above embodiment is used as a conductive node, which can be as follows: Figure 7 As shown, a conductive pin 27 is fixed to the bottom of the liquid storage tank 22, and the conductive pin 27 is in contact with the conductive liquid. Figure 6-Figure 7One end of the conductive pin 27 is provided with an insulating sleeve 26, and the insulating sleeve 26 passes through the bottom of the liquid storage tank 22 to avoid causing local conduction. The inside of the liquid storage tank 22 and the through hole 21 can be sprayed with insulating heat-resistant materials, or directly embedded with an inlay made of insulating high-temperature resistant materials that is consistent with the shape of the liquid storage tank 22 and the through hole 21.

[0040] As another important structural design, one of the pressure component structures mentioned above can be as follows: Figure 1 As shown, from top to bottom, it includes a clamping bolt 10, a mounting seat 11, a pressure-resistant spring 12, a sliding block 13, a pressure sensing element 14 and a contact plate 15, wherein the clamping bolt 10 is threadedly screwed into the mounting frame 3 and contacts the mounting seat 11, and the bottom of the mounting seat 11 has a concave cavity, in which a pressure-resistant spring 12 is installed, and the bottom end of the pressure-resistant spring 12 is connected to the sliding block 13 slidably installed in the concave cavity, and the sliding block 13 is connected to the contact plate 15 through the pressure sensing element 14, and the contact plate 15 is located on the top surface of the bearing seat, so that in the process of tightening the clamping bolt 10, a corresponding pressure can be applied to the corresponding bearing seat, and then a corresponding pressure can be applied to the roller 2, that is, a corresponding pressure is applied to the roller for testing, and the pressure sensing element 14 can intuitively display the pressure value of the simulated roller, and as the roller or the roller 2 wears, this pressure is always continuously loaded on the roller.

[0041] In the above structural design, a pressure-resistant spring 12 is used to allow the roller 2 to automatically follow the degree of wear of the roller, so as to maintain the relative rolling and squeezing contact relationship between the two. However, at the beginning, the pressure is determined, that is, the tightening depth of the clamping bolt 10 is determined, as the degree of wear of the roller or the roller 2 increases, the pressure-resistant spring 12 will actually be gradually released, that is, it has a very small elastic release amount, that is, a very small elongation. This elongation will cause the actual pressure loaded on the roller 2 to be smaller than the expected design. Because the steel itself is heavier, the positive pressure liquid loaded on the roller through the roller 2 is larger, then the stiffness coefficient of the pressure-resistant spring 12 used in practice is larger. Therefore, the release of a small amount of elastic deformation of the pressure-resistant spring 12 will actually produce a larger change in the pressure value. In order to make the vertical load applied to the roller 2 relatively unchanged during the test, as another structural design: such as Fig. 9As shown, this embodiment particularly uses a cylinder 28 whose pressure of input compressed gas can be adjusted as a pressure component to provide load. The telescopic shaft 29 of the cylinder 28 vertically slides through the top of the mounting frame 3 and contacts the bearing seat. Because as long as the pressure value is set, once the roller 2 or the roller moves down due to wear, the telescopic shaft 29 will move with it, and then the pressure value will be constant, ensuring that the roller under test always has a relatively stable experimental positive pressure load. The driving device 30 in the above embodiment can be directly selected as a motor, such as Fig. 9 One end of the motor is installed in a vertical guide groove 32 on the stand 33 through a guide block 31 in a vertical sliding fit, so that when the pressure assembly presses the bearing seat and the roller 2 downward, the motor driving the roller 2 can also move downward more stably without affecting the rotation driving action of the roller 2 as much as possible.

[0042] The above series of specific implementation details are merely some preferred embodiments of the present invention and cannot be used to limit the protection scope of the claims of the present invention. A person skilled in the art can simply change the design ideas based on the understanding of the above embodiments and the reference to the basic principles recorded in the claims of the present invention. However, these design changes still fall within the protection scope of the invention.

Claims

1. A high temperature wear tester, comprising a mounting frame (3) for rotatably mounting a roller (1) to be tested, characterized in that: A roller (2) parallel to the roller (1) to be tested is arranged above the roller (1), a heating component for heating the roller (2) is arranged inside the roller (2), two ends of the core shaft (201) of the roller (2) are respectively rotatably mounted in the bearing seat, the bearing seat is vertically slidably mounted in the mounting frame (3), and is connected to a pressure component, the pressure component enables the bearing seat to slide down to a position where the roller (2) and the heating component always maintain rolling contact, and the extrusion force applied by the pressure component to the roller (2) through the bearing seat can be adjusted; One end of the mandrel (201) is in driving connection with a driving device (30) which is vertically slidably mounted and capable of detecting the number of revolutions. The driving device (30) drives the mandrel (201) and the roller (2) to rotate synchronously together. When the roller (1) to be tested is worn to a set degree, the driving device (30) stops rotating and records the number of revolutions that have been rotated at this time. The mounting frame (3) comprises supporting plates arranged opposite to each other, wherein the upper portion of the supporting plate has a vertically arranged rectangular groove, in which a first rectangular bearing seat (901) is vertically slidably mounted; and a second bearing seat (902) for mounting a roller shaft (101) of a roller is embedded and fixed in the lower portion of the supporting plate; A mounting plate (16) is fixed obliquely at a lower position on one side of each of the two support plates, and the inclination direction of the mounting plate (16) is in one of the diameter directions of the roller. The two mounting plates (16) are relatively arranged outside the two ends of the roller. A strip-shaped sliding hole (18) is provided on the mounting plate (16) along its inclination direction. The strip-shaped sliding hole (18) is provided for a rotating shaft (20) of a smooth roller body (19) to be rolled and installed and to be slidably installed along the strip-shaped groove. The rotating shaft (20) and the smooth roller body (19) are coaxially fixed as a whole. A cantilever (17) is also fixed on one side of the free end of the mounting plate (16). The cantilever (17) is located on the symmetrical axis in the inclination direction of the mounting plate (16), and one end of the cantilever (17) extends At the position directly opposite to the strip-shaped sliding hole (18), a liquid storage tank (22) for containing conductive liquid is provided on the surface of the cantilever (17) directly opposite to the strip-shaped sliding hole (18); a through hole (21) is provided in the axial direction of the rotating shaft (20), and the end surface of the rotating shaft (20) is in sliding contact and connection with the surface of the cantilever (17) directly opposite to the strip-shaped sliding hole (18) in a dynamic sealing manner. In the initial state, the orifice of the through hole (21) is located in the liquid storage tank (22), and the driving device (30) is kept in a powered-on state. When the surface of the roller (1) to be tested is worn to a set degree, the smooth roller body (19) slides down to the position where the orifice leaves the liquid storage tank (22), and the driving device (30) is in a powered-off and stopped state.

2. A high temperature wear resistance testing machine according to claim 1, characterized in that: The interior of the drum (2) is a hollow structure, and the heating component includes an electric heating tube (4) axially spirally wound along the inner wall of the drum (2), the electric heating tube (4) extends into one end of the core shaft (201) without contact, and the end extending into the core shaft (201) is a cylindrical structure (5) with an increased diameter, and the outside of the cylindrical structure (5) is coaxially provided with an insulating protective sleeve (6) in rotational contact with the core shaft (201), the insulating protective sleeve (6) is fixedly embedded in the axial direction of the core shaft (201), and is coaxially fixed to an insulating flange pipe (7) passing through the end of the core shaft (201), and the power cord (8) of the electric heating tube (4) passes through the flange pipe (7) and extends out of the end of the core shaft (201).

3. A high temperature wear resistance testing machine according to claim 1, characterized in that: The liquid storage tank (22) is a rectangular strip groove, which is arranged to extend along the inclined direction of the cantilever (17), and the through hole (21) is a rectangular hole.

4. A high temperature wear resistance testing machine according to claim 3, characterized in that: An insulating piston plate (23) is slidably installed in the liquid storage tank (22) along its tilting direction. The piston plate (23) is screwed into the free end of the cantilever (17) in a threaded manner and rotates with an adjusting screw (25) in the liquid storage tank (22). A pressure spring (24) that is always in a compressed state is sleeved on the adjusting screw (25) between the piston plate (23) and the liquid storage tank (22).

5. A high temperature wear resistance testing machine according to claim 1, characterized in that: A conductive pin (27) is fixed to the bottom of the liquid storage tank (22), one end of the conductive pin (27) is sleeved with an insulating sleeve (26), and the insulating sleeve (26) passes through the bottom of the liquid storage tank (22).

6. A high temperature wear resistance testing machine according to any one of claims 1 to 5, characterized in that: The pressure-applying assembly includes, from top to bottom, a clamping bolt (10), a mounting seat (11), a pressure-resistant spring (12), a sliding block (13), a pressure sensing element (14) and a contact plate (15), wherein the clamping bolt (10) is screwed into the mounting frame (3) in a threaded manner and is in contact with the mounting seat (11), the mounting seat (11) has a concave cavity at the bottom, the pressure-resistant spring (12) is installed in the concave cavity, the bottom end of the pressure-resistant spring (12) is connected to the sliding block (13) slidably installed in the concave cavity, the sliding block (13) is connected to the contact plate (15) through the pressure sensing element (14), and the contact plate (15) is located on the top surface of the bearing seat.

7. A high temperature wear resistance testing machine according to any one of claims 1 to 5, characterized in that: The pressure-applying assembly comprises a cylinder (28) whose pressure of the input compressed gas can be adjusted. The telescopic shaft (29) of the cylinder (28) vertically slides through the top end of the mounting frame (3) and then contacts the bearing seat.

8. A high temperature wear resistance testing machine according to claim 1, characterized in that: The driving device (30) is a motor, one end of which is installed in a vertical guide groove (32) on a stand (33) in a vertical sliding manner through a guide block (31).

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