Bearing friction test device and test method

Abstract

The invention discloses a bearing friction test device and a test method, the bearing friction test device comprises a support, a central shaft, a pressurizing mechanism, a heating mechanism, a driving mechanism and a control mechanism, the central shaft is rotatably arranged on the support, a shaft sleeve is arranged on the central shaft and is used for installing a bearing to be detected, the pressurizing mechanism applies pressure to the bearing to be detected, and the heating mechanism is used for heating the bearing to be detected. The pressurizing mechanism comprises a pressure sensor capable of measuring pressure, the heating mechanism heats the to-be-detected bearing and comprises a temperature sensor capable of measuring the temperature of the to-be-detected bearing, and the driving mechanism is in transmission connection with the center shaft so as to drive the center shaft to rotate. The driving mechanism comprises an angular displacement sensor capable of measuring the rotation angle and torque of the center shaft and a torque measuring strain gauge, and the pressurizing mechanism, the driving mechanism and the heating mechanism are all connected with the control mechanism. The bearing friction test device disclosed by the invention is simple in structure and convenient to operate, and can perform a friction test on the to-be-detected bearing under the conditions of high temperature and large load so as to evaluate the performance of the to-be-detected bearing.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and more specifically, to a bearing friction test device and a test method. Background Art

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy.

[0003] The performance of bearings under high temperature and high load conditions is of great significance. Accurately measuring the friction torque of bearings under high temperature and high load can accurately evaluate the performance of bearings.

[0004] Therefore, how to conduct friction tests on bearings under high temperature and high load to detect the performance of the bearings has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a bearing friction test device for performing a friction test on a bearing under high temperature and high load to detect the performance of the bearing.

[0006] Another core of the present invention is to disclose a test method using the above-mentioned bearing friction test device.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A bearing friction test device, comprising:

[0009] Bracket;

[0010] A central shaft, which is rotatably arranged on the bracket, and a shaft sleeve is arranged on the central shaft for mounting the bearing to be tested;

[0011] A pressurizing mechanism, which applies pressure to the bearing to be tested, and includes a pressure sensor capable of measuring pressure;

[0012] A heating mechanism, the heating mechanism is used to heat the bearing to be tested, and the heating mechanism includes a temperature sensor capable of measuring the temperature of the bearing to be tested;

[0013] A driving mechanism, the driving mechanism is connected to the central shaft to drive the central shaft to rotate, and the driving mechanism includes an angular displacement sensor capable of measuring the rotation angle of the central shaft and a torsion strain gauge capable of measuring the torque of the central shaft;

[0014] The control mechanism, the pressurizing mechanism, the driving mechanism and the heating mechanism are all connected to the control mechanism.

[0015] Optionally, in the above-mentioned bearing friction test device, the pressurizing mechanism includes a pressurizing device, a loading block and a pressure sensor, the loading block is sleeved on the bearing to be tested and connected to the bracket, and the pressurizing device applies pressure to the loading block;

[0016] The pressure sensor is arranged on the bearing to be detected.

[0017] Optionally, in the above-mentioned bearing friction test device, the heating mechanism includes a steam generator, a heating sealing chamber and a temperature sensor;

[0018] A sealing structure is provided at one end of the bearing to be tested, and the sealing structure is respectively connected to the central shaft and the loading block to form a heating sealing cavity between the sealing structure and the bearing to be tested, and the steam generator is connected to the heating sealing cavity.

[0019] Optionally, in the above-mentioned bearing friction test device, the heating mechanism further includes a heat sink, which is connected to the central shaft to reduce the temperature of the central shaft, and the heat sink includes heat sink fins arranged along the circumference of the heat sink.

[0020] Optionally, in the above-mentioned bearing friction testing device, the direction of the pressure applied by the pressurizing mechanism to the bearing to be tested is along the radial direction of the bearing to be tested.

[0021] Optionally, in the above-mentioned bearing friction test device, the loading block includes a loading block body and a wing plate arranged on the loading block body, the loading block body is provided with a through hole capable of accommodating the bearing to be tested, and the loading block is connected to the bracket through the wing plate.

[0022] Optionally, in the above-mentioned bearing friction test device, the pressurizing mechanism further includes a transition piece, the transition piece is connected to the loading block, and the pressurizing device applies pressure to the transition piece;

[0023] The loading block comprises two wing plates, one of which is provided with a mounting hole, and the other is provided with a waist-shaped hole.

[0024] Optionally, in the above-mentioned bearing friction test device, the driving mechanism includes a driving device, a rotating arm, an angular displacement sensor and a torsion strain gauge, the driving device is connected to the rotating arm, and the rotating arm is connected to the central axis;

[0025] The angular displacement sensor is arranged on the central axis, and the torsion strain gauge is arranged on the central axis;

[0026] The angular displacement sensor and the torsion strain gauge are both connected to the control mechanism.

[0027] A bearing friction test method, using the above-mentioned bearing friction test device, comprises:

[0028] Install the bearing to be tested on the sleeve;

[0029] Apply pressure to the bearing to be tested through a pressure mechanism, and measure the pressure value through a pressure sensor;

[0030] The bearing to be tested is heated by a heating mechanism, and the temperature of the bearing to be tested is measured by a temperature sensor;

[0031] The central shaft is driven to rotate by a driving mechanism, the rotation angle of the central shaft is measured by an angular displacement sensor, and the torque of the central shaft is measured by a torsion strain gauge;

[0032] The variation law of torque with rotation angle, pressure and temperature is obtained.

[0033] Optionally, in the above-mentioned bearing friction test method, the position of the force applied by the pressurizing mechanism to the bearing to be tested is changed to obtain the variation pattern of the torque with the rotation angle, pressure and temperature under the eccentric load condition.

[0034] It can be seen from the above scheme that the bearing friction test device disclosed in the present invention has a simple structure and is easy to operate. It can perform friction tests on the bearing to be tested under high temperature and high load conditions to evaluate the performance of the bearing to be tested, ensure its reliability and durability under actual working conditions, and guide actual production. The bearing test friction method disclosed in the present invention has the same technical effect and will not be described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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 description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a structural schematic diagram of a bearing friction test device disclosed in an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of the structure of the central axis disclosed in an embodiment of the present invention;

[0038] Figure 3 for Figure 2 Middle AA section;

[0039] Figure 4 for Figure 2 The cross-section of middle B;

[0040] Figure 5 It is a schematic diagram of the structure of the shaft sleeve disclosed in the embodiment of the present invention;

[0041] Figure 6 for Figure 5 Middle CC section;

[0042] Figure 7 for Figure 5 Middle DD section;

[0043] Figure 8 for Figure 5 Middle EE section;

[0044] Fig. 9 A schematic diagram of the structure of the loading block disclosed in the embodiment of the present invention Figure 1 ;

[0045] Fig.10 A schematic diagram of the structure of the loading block disclosed in the embodiment of the present invention Figure 2 ;

[0046] Fig.11 for Fig. 9 Middle FF section;

[0047] Fig.12 It is a partial enlarged view of the bearing friction test device disclosed in an embodiment of the present invention.

[0048] Among them, 10, bracket, 11, bearing seat, 20, center axis, 30, bearing to be tested, 40, pressurizing mechanism, 41, pressurizing equipment, 42, loading block, 421, loading block body, 422, wing plate, 43, transition piece, 50, driving mechanism, 51, driving equipment, 52, rotating arm, 53, angular displacement sensor, 54, torsion strain gauge, 60, bushing, 70, heating sealing chamber, 71, sealing structure, 72, distance sleeve, 73, heat sink. DETAILED DESCRIPTION

[0049] The core of the present invention is to disclose a bearing friction test device, so as to perform a friction test on the bearing under high temperature and high load to detect the performance of the bearing.

[0050] Another core of the present invention is to disclose a test method using the above-mentioned bearing friction test device.

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0052] like Figure 1 As shown, an embodiment of the present invention discloses a bearing friction test device, which includes a bracket 10, a central shaft 20, a pressurizing mechanism 40, a driving mechanism 50, a heating mechanism and a control mechanism.

[0053] The central shaft 20 is rotatably arranged on the bracket 10, a sleeve 60 is arranged on the central shaft 20, and the bearing 30 to be detected is installed on the central shaft 20 through the sleeve 60. The pressurizing mechanism 40 applies pressure to the bearing 30 to be detected, and the pressurizing mechanism 40 includes a pressure sensor capable of measuring pressure. The heating mechanism is used to heat the bearing 30 to be detected, and the heating mechanism includes a temperature sensor arranged to measure the temperature of the bearing 30 to be detected. The driving mechanism 50 is connected to the central shaft 20 in a transmission manner to drive the central shaft 20 to rotate. The driving mechanism 50 includes an angular displacement sensor 53 capable of measuring the rotation angle of the central shaft 20 and a torsion strain gauge 54 capable of measuring the torque of the central shaft 20. The pressurizing mechanism 40, the driving mechanism 50 and the heating mechanism are all connected to the control mechanism.

[0054] During the test, the pressure mechanism 40 applies a certain pressure to the bearing 30 to be tested to provide a pressure environment, the heating mechanism heats the bearing 30 to be tested to provide a temperature environment, the driving mechanism 50 drives the bearing 30 to be tested to rotate, and the rotation angle of the central shaft 20 is measured by the angular displacement sensor 53, and the torque of the central shaft 20 is measured by the torsion strain gauge 54, so that the torque at different rotation angles under certain load and temperature conditions can be obtained, and then the change law of the friction coefficient of the bearing 30 to be tested with the rotation angle can be obtained. By changing the pressure and heating temperature applied to the bearing 30 to be tested, the change law of the friction coefficient, pressure and temperature can be obtained to guide actual production. The actual operation of the pressure mechanism 40, the heating mechanism and the driving mechanism 50 can all be achieved through the control system.

[0055] The bearing friction test device disclosed in the embodiment of the present invention has a simple structure and is easy to operate. It can perform friction tests on the bearing 30 to be tested under high temperature and high load conditions to evaluate the performance of the bearing 30 to be tested, ensure its reliability and durability under actual working conditions, and guide actual production.

[0056] In some specific embodiments, Figure 1 As shown in the figure, a bearing seat 11 is provided on the bracket 10, and the central shaft 20 is installed on the bearing seat 11. There are three bearing seats 11 in the figure. The bearing seats 11 located at both ends of the central shaft 20 are roller bearing seats, and the bearing seat 11 located between the bearing seats 11 at both ends is a ball bearing seat. It should be noted that the number and type of bearing seats can be adjusted according to actual conditions, and this is only an example.

[0057] The sleeve 60 is connected to the central shaft 20 by means of concave-convex matching. Figure 2-Figure 8As shown, the center shaft 20 is provided with grooves arranged along the circumferential direction, and the sleeve 60 is provided with protrusions matching with the grooves, so that when the sleeve 60 is installed on the center shaft 20, the protrusions are embedded in the grooves to realize the connection between the sleeve 60 and the center shaft 20. This connection method is easy to operate and convenient for disassembly and assembly.

[0058] In some specific embodiments, Figure 1 As shown, the pressurizing mechanism 40 includes a pressurizing device 41, a loading block 42 and a pressure sensor. The loading block 42 is sleeved on the bearing 30 to be detected and connected to the bracket 10. The pressurizing device 41 applies pressure to the loading block 42, which is then transmitted to the bearing 30 to be detected. The pressure sensor can be arranged on the loading block 42 or on the bearing 30 to be detected. In order to make the bearing 30 to be detected bear force evenly, it is preferred that the axial length of the loading block 42 is the same as the axial length of the bearing 30 to be detected.

[0059] In some specific embodiments, Figure 1 As shown, the heating mechanism includes a steam generator, a heating sealed cavity 70 and a temperature sensor, wherein the steam generator and the temperature sensor are not shown in the figure, a sealing structure 71 is provided at one end of the bearing 30 to be detected, and the sealing structure 71 is respectively connected to the central shaft 20 and the loading block 42 to form a heating sealed cavity 70 between the sealing structure 71 and the bearing 30 to be detected, and the steam generator is connected to the heating sealed cavity 70, and steam is introduced into the heating sealed cavity 70, so as to heat the bearing 30 to be detected. Specifically, the sealing can be performed by a graphite packing and a sealing gasket, and the graphite packing and the loading block 42 can be connected by bolts. In other specific embodiments, the bearing 20 to be detected can also be heated by induction heating.

[0060] In order to prevent the outer ring of the bearing 30 to be tested from rotating, when the sealing structure 71 is connected to the loading block 42, the width of the abutment portion between the sealing structure 71 and the loading block 42 is slightly smaller than the flange thickness of the bearing 30 to be tested, so that when the sealing structure 71 and the loading block 42 are connected by bolts, the bearing 30 to be tested is pressed. Fig.12 shown.

[0061] In order to dissipate heat from the central shaft 20 and reduce the influence of the steam generator passing steam into the heating sealed cavity 70 on the temperature of the central shaft 20, in some specific embodiments, the heating mechanism further includes a heat sink 73, which can be connected to the central shaft or to the sleeve 60, and includes heat sink fins, which are arranged along the circumference of the heat sink 73. Preferably, the heat sink 73 and the heating sealed cavity are respectively arranged at both ends of the bearing 30 to be tested.

[0062] In order to locate the position of the sealing structure 71 , in some specific embodiments, a distance sleeve 72 is provided on the bearing 30 to be detected. Specifically, the distance sleeve 72 is provided on the bearing seat 11 located at the end.

[0063] The direction of the pressure applied by the pressure mechanism 40 to the bearing 30 to be tested is along the radial direction of the bearing 30 to be tested, and the pressure can be applied in the vertical direction or in the horizontal direction. Preferably, the pressure is applied in the vertical direction to the bearing 30 to be tested. The pressure device 41 can be a hydraulic cylinder, the upper end of which is fixed, and the pressure is applied to the loading block 42 in the vertical direction. Figure 1 The example in which the pressure device 41 applies pressure to the loading block 42 from top to bottom is used for explanation.

[0064] Specifically, Figure 9-11 As shown, the loading block 42 includes a loading block body 421 and a wing plate 422 arranged on the loading block body 421, the wing plate 422 extends radially along the loading block body 421, and a through hole capable of accommodating the bearing 30 to be detected is opened on the loading block body 421. The loading block 42 is connected to the bracket 10 through the wing plate 422, and the pressurizing device 41 applies pressure to one of the wing plates 422, and then transmits it to the bearing 30 to be detected.

[0065] like Figure 1 As shown, in other specific embodiments, in order to be able to perform friction tests on the bearing 30 to be tested with uniform load and uneven load, the pressure mechanism 40 also includes a transition piece 43. Specifically, the transition piece 43 is connected to the loading block 42. The pressure device 41 applies pressure to the transition piece 43. In order to make the transition piece 43 bear force evenly, the side of the transition piece 41 that receives force is preferably set to a flat surface. Figure 9-10 As shown, the loading block 42 includes two wing plates 422, and the two wing plates 422 are symmetrically arranged along the axis of the loading block body 421. A mounting hole is provided on one of the wing plates 422. When the transition piece 43 cooperates with the mounting hole, when the loading block 42 is installed on the bearing to be detected 30, the line connecting the center of the mounting hole and the center of the bearing to be detected 30 is perpendicular to the axis of the bearing to be detected 30, so that the pressure applied by the pressurizing device 41 acts vertically on the bearing to be detected 30. A waist-shaped hole is provided on the other wing plate 422. The center of the waist-shaped hole and the center of the mounting hole are offset, and can be arranged to the right or to the left. When the transition piece 43 cooperates with the waist-shaped hole, it can simulate the possible overload situation of the bearing to be detected 30 in actual work. Fig.10 shown.

[0066] When it is necessary to conduct a friction test on the bearing 30 to be tested under uniform load, the transition piece 42 can be connected to the mounting hole, specifically by pin connection or bolt connection, so that the pressure applied by the pressure device 41 on the bearing 30 to be tested is uniform; when it is necessary to conduct a friction test on the bearing 30 to be tested under uneven load (eccentric load condition), the transition piece 42 can be connected to the waist-shaped hole. By matching the transition piece 43 with the mounting hole and the waist-shaped hole respectively, the bearing 30 to be tested under uniform load and uneven load can be subjected to friction tests, so as to obtain the relationship between the torque and the deflection angle of the bearing 30 to be tested under uniform load condition and eccentric load condition, so as to test the performance of the bearing 30 to be tested under different working conditions.

[0067] When it is necessary to test the bearing 30 of different models and specifications, it is only necessary to replace the sleeve 60 and the loading block 42 of the size matching the bearing 30 to be tested, and other equipment does not need to be replaced.

[0068] The drive mechanism 50 has a variety of setting schemes. It can be connected to the central shaft 20 by a driving motor and a pulley mechanism to drive the central shaft 20 to rotate; it can also be driven by a driving motor to drive the central shaft 10 to rotate through a gear assembly; or the central shaft 10 can be driven to rotate by connecting the output shaft of the drive motor to the central shaft 20.

[0069] In some specific embodiments, Figure 1 As shown, the driving mechanism 50 includes a driving device 51, a rotating arm 52, an angular displacement sensor 53 and a torsion strain gauge 54. The driving device 51 is connected to the rotating arm 52, and the rotating arm 52 is connected to the central shaft 20. The driving device 51 drives the rotating arm 52 to rotate, thereby driving the central shaft 20 to rotate. Specifically, the driving device 51 can be a hydraulic cylinder, and the rotating arm 52 includes a connecting rod and a crankshaft. The piston rod of the hydraulic cylinder is connected to the connecting rod, the connecting rod is connected to the crankshaft, and the crankshaft is connected to the central shaft 20, so as to convert the linear motion of the piston rod into the rotational motion of the central shaft 20.

[0070] The angular displacement sensor 53 is disposed on the central axis 20, and the torsion strain gauge 54 is disposed on the central axis 20. Specifically, Figure 1 and Figure 5-Figure 7 As shown, a simply supported beam structure is provided on the shaft sleeve 60, and a torsion strain gauge 54 is installed at the simply supported beam structure, preferably by adhesive connection, to measure the torque of the central shaft 20, and the angular displacement sensor 53 and the torsion strain gauge 54 are both connected to the control mechanism.

[0071] In addition, an embodiment of the present invention further discloses a bearing friction test method, which uses the above-mentioned friction test device and includes the following steps:

[0072] S1. Install the bearing 30 to be tested on the shaft sleeve 60.

[0073] S2. Apply pressure to the bearing 30 to be tested through the pressure mechanism 40, and measure the pressure value through the pressure sensor.

[0074] Specifically, a preset pressure can be input through the control mechanism to control the pressurizing mechanism 40 to start and apply pressure to the bearing 30 to be tested. The input pressure can be adjusted through the control mechanism to change the load borne by the bearing 30 to be tested.

[0075] S3. The bearing to be tested 30 is heated by a heating mechanism, and the temperature of the bearing to be tested 30 is measured by a temperature sensor.

[0076] Specifically, steam is injected into the heating sealing chamber 70 through a steam generator to heat the bearing 30 to be tested, and the temperature of the bearing 30 to be tested is measured by a temperature sensor. The temperature of the bearing 30 to be tested can be changed by changing the amount of steam introduced.

[0077] S4. The central shaft 20 is driven to rotate by the driving mechanism 50 , the rotation angle of the central shaft 20 is measured by the angular displacement sensor 53 , and the torque of the central shaft 20 is measured by the torsion strain gauge 54 .

[0078] When the temperature of the bearing 30 to be tested reaches a preset temperature, the central shaft 20 is driven to rotate by the driving mechanism 50 to measure the torque when the central shaft 20 rotates at different angles.

[0079] S5. Obtain the variation of torque with rotation angle, pressure and temperature;

[0080] According to the pressure value measured by the pressure sensor, the torque measured by the torsion strain gauge 54, the temperature measured by the temperature sensor, and the rotation angle measured by the angular displacement sensor 53, the variation law of the torque with the rotation angle, pressure and temperature can be obtained. Further, the variation law of the friction factor with the rotation angle, pressure and temperature can be obtained. According to the pressure value measured by the pressure sensor, the torque measured by the torsion strain gauge 54, and the nominal inner diameter of the bearing 30 to be tested, the friction coefficient between the center shaft 20 and the bearing 30 to be tested can be calculated. Specifically, the pressure value measured by the pressure sensor is recorded as P, the torque measured by the torsion strain gauge is recorded as M, the nominal radius of the center shaft 20 is recorded as r, and the friction coefficient is recorded as μ, then: μ=M / (P×r), and the variation law of the friction factor with the rotation angle, pressure and temperature can be obtained.

[0081] In addition, by changing the position of the force applied by the pressure mechanism 40 to the bearing to be tested 30, the variation law of the torque with the rotation angle, pressure and temperature under the eccentric load condition can be obtained, and the variation law of the friction coefficient of the bearing to be tested 30 with the rotation angle, pressure and temperature can be further obtained. Specifically, the loading block 42 can be turned upside down so that the waist-shaped holes of the transition piece 43 are connected, thereby obtaining the variation law of the friction coefficient of the bearing to be tested 30 with the rotation angle, pressure and temperature under the eccentric load condition.

[0082] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0083] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0084] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0085] The terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0086] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A bearing friction test device, characterized in that: include: Bracket (10); A central shaft (20), the central shaft (20) being rotatably disposed on the bracket (10), and a shaft sleeve (60) being disposed on the central shaft (20) for mounting a bearing (30) to be tested; A pressurizing mechanism (40), the pressurizing mechanism (40) applying pressure to the bearing to be tested (30), the pressurizing mechanism (40) comprising a pressure sensor capable of measuring the pressure; A heating mechanism, the heating mechanism being used to heat the bearing to be detected (30), the heating mechanism comprising a temperature sensor capable of measuring the temperature of the bearing to be detected (30); a driving mechanism (50), the driving mechanism (50) being drivingly connected to the central shaft (20) to drive the central shaft (20) to rotate, the driving mechanism (50) comprising an angular displacement sensor (53) capable of measuring the rotation angle of the central shaft (20) and a torsion strain gauge (54) capable of measuring the torque of the central shaft (20); A control mechanism, wherein the pressurizing mechanism (40), the driving mechanism (50) and the heating mechanism are all connected to the control mechanism.

2. The bearing friction test device according to claim 1, characterized in that: The pressurizing mechanism (40) comprises a pressurizing device (41), a loading block (42) and the pressure sensor; the loading block (42) is sleeved on the bearing to be detected (30) and connected to the bracket (10); the pressurizing device (41) applies pressure to the loading block (42); The pressure sensor is arranged on the bearing (30) to be detected.

3. The bearing friction test device according to claim 2, characterized in that: The heating mechanism comprises a steam generator, a heating sealed cavity (70) and the temperature sensor; A sealing structure (71) is provided at one end of the bearing to be detected (30), and the sealing structure (71) is respectively connected to the central shaft (20) and the loading block (42) to form the heating sealing cavity (70) between the sealing structure (71) and the bearing to be detected (30), and the steam generator is connected to the heating sealing cavity (70).

4. The bearing friction test device according to claim 3, characterized in that: The heating mechanism further comprises a heat sink (73), the heat sink (73) being connected to the central shaft (20) to reduce the temperature of the central shaft (20), the heat sink (73) comprising heat sink fins arranged along the circumference of the heat sink (73).

5. The bearing friction test device according to claim 2, characterized in that: The direction of the pressure applied by the pressurizing mechanism (40) to the bearing to be tested (30) is along the radial direction of the bearing to be tested (30).

6. The bearing friction test device according to claim 5, characterized in that: The loading block (42) comprises a loading block body (421) and a wing plate (422) arranged on the loading block body (421); a through hole capable of accommodating the bearing (30) to be tested is provided on the loading block body (421); and the loading block (42) is connected to the bracket (10) via the wing plate (422).

7. The bearing friction test device according to claim 6, characterized in that: The pressurizing mechanism (40) further comprises a transition piece (43), wherein the transition piece (43) is connected to the loading block (42), and the pressurizing device (41) applies pressure to the transition piece (43); The wing plates (422) of the loading block (42) include two, one of the wing plates (422) is provided with a mounting hole, and the other wing plate (422) is provided with a waist-shaped hole.

8. The bearing friction test device according to claim 1, characterized in that: The driving mechanism (50) comprises a driving device (51), a rotating arm (52), an angular displacement sensor (53) and the torsion strain gauge (54); the driving device (51) and the rotating arm (52) are connected, and the rotating arm and the central shaft (20); The angular displacement sensor (53) is arranged on the central axis (20), and the torsion strain gauge (54) is arranged on the central axis (20); The angular displacement sensor (53) and the torsion strain gauge (54) are both connected to the control mechanism.

9. A bearing friction test method, using the bearing friction test device according to any one of claims 1 to 8, characterized in that: include: Mounting the bearing to be tested (30) on the shaft sleeve (60); Applying pressure to the bearing to be tested (30) through the pressurizing mechanism (40), and measuring the pressure value through the pressure sensor; heating the bearing to be tested (30) by means of the heating mechanism, and measuring the temperature of the bearing to be tested (30) by means of a temperature sensor; The central shaft (20) is driven to rotate by the driving mechanism (50), the rotation angle of the central shaft (20) is measured by an angular displacement sensor (53), and the torque of the central shaft (20) is measured by a torsion strain gauge (54); The variation law of torque with rotation angle, pressure and temperature is obtained.

10. The bearing friction test method according to claim 9, characterized in that: The position of the force applied by the pressurizing mechanism (40) to the bearing to be tested (30) is changed to obtain a variation pattern of the torque with the rotation angle, pressure and temperature under an eccentric load condition.

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