A high-temperature environment simulation test device for high-speed rolling bearings

Abstract

A high-temperature environment simulation test device for high-speed rolling bearings includes a mounting base plate, a test bearing, a drive assembly, a cooling protection assembly, a bearing heating assembly, and an axial force loading assembly. The drive assembly includes a mounting spindle, on which both the test bearing and the cooling protection assembly are mounted. The test bearing can rotate under the drive of the mounting spindle. The cooling protection assembly is assembled between the test bearing and the power input end of the mounting spindle for cooling the mounting spindle during high-temperature operation. The axial force loading assembly is located at one end of the mounting spindle and acts on the end face of the test bearing away from the cooling protection assembly to apply axial force to the test bearing. This invention can quickly, efficiently, and reliably achieve controllable temperature regulation of the test bearing and ensure the uniformity and stability of the overall temperature of the test bearing, thus meeting the needs of research on the mechanisms of temperature field changes, friction, and heat transfer in rolling bearings.

Description

Technical Field

[0001] This invention relates to the field of rolling bearing testing equipment, specifically a high-temperature environment simulation testing device for high-speed rolling bearings. Background Technology

[0002] Rolling bearings are crucial components of mechanical equipment and have an extremely wide range of applications. Therefore, the technology for predicting their service life and overall performance has a very broad market. During operation, the heat generated by friction and the axial stress conditions are important causes of rolling bearing failure. Thus, studying the internal temperature field changes and the axial stress conditions of rolling bearings is of great significance.

[0003] Currently, there is limited research on the internal temperature field changes of bearings in existing technologies. The few existing studies also lack uniform and consistent temperature control in rolling bearings, resulting in low reliability of test results. Therefore, it is essential to develop an experimental device that can achieve high efficiency, uniformity, and controllable temperature maintenance in bearings to meet the research needs on the mechanisms of bearing temperature field changes, friction, and heat transfer. Summary of the Invention

[0004] The technical objective of this invention is to improve the structure of the test device so that it can quickly, efficiently and reliably achieve controllable temperature regulation of the test bearing, and ensure the uniformity and stability of the overall temperature of the test bearing, so as to meet the needs of studying the mechanism of temperature field change, friction, heat transfer and other aspects of rolling bearings.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a high-speed rolling bearing high-temperature environment simulation test device, including a mounting base plate and a test bearing, a drive assembly, a cooling protection assembly, a bearing heating assembly and an axial force loading assembly disposed on the mounting base plate. The drive assembly includes a horizontally arranged rotatable mounting spindle. The test bearing and the cooling protection assembly are both mounted on the mounting spindle. The test bearing can rotate under the drive of the mounting spindle. The cooling protection assembly is assembled between the test bearing and the power input end of the mounting spindle and is used to cool the mounting spindle when it is operating at high temperature. The axial force loading assembly is disposed at one end of the mounting spindle and acts on the end face of the test bearing away from the cooling protection assembly to apply axial force to the test bearing.

[0006] The bearing heating assembly includes an electromagnetic heating ring, a heating ring base, a constant temperature gas source, a constant temperature gas delivery pipeline, and a flow stabilizer. The electromagnetic heating ring is fixed to the mounting base plate via the heating ring base. The electromagnetic heating ring is sleeved on the outside of the test bearing and can cover the outer side of the outer ring of the test bearing and one end face near the cooling protection assembly. An electromagnetic heating coil is provided inside the electromagnetic heating ring. Multiple constant temperature gas inlets connected to the chamber where the rolling elements of the test bearing are located are provided on the electromagnetic heating ring. Temperature detection holes for measuring the temperature of the test bearing are also provided on the electromagnetic heating ring.

[0007] The stabilizer has an annular disc structure with its clamp on the outside of the mounting shaft. The stabilizer is vertically split into an intake disc and a sealing disc arranged side-by-side along its radial direction. Both the intake disc and the sealing disc have gas channels and gas inlets on their mating surfaces. The gas channels are annular, and the gas inlets are evenly distributed along the circumference of the annular gas channels. Multiple nozzles are also evenly distributed along the circumference of the gas channels on the intake disc, and these nozzles correspond one-to-one with multiple constant-temperature gas inlets on the electromagnetic heating ring. The gas channels and gas inlets on the intake disc and the gas channels and gas inlets on the sealing disc are aligned left and right, forming a constant-temperature gas channel in the middle of the stabilizer that is connected to the chamber where the rolling elements of the test bearing are located. This constant-temperature gas channel is connected to an external constant-temperature gas source via a gas inlet and a constant-temperature gas delivery pipe, and is used to deliver constant-temperature gas to the surface of the test bearing for gas atmosphere heating and cooling.

[0008] Furthermore, the drive assembly includes a drive motor and a mounting spindle, wherein the drive motor is fixed to the mounting base plate via a motor base, and the mounting spindle is connected to the output shaft of the drive motor.

[0009] Furthermore, the cooling protection assembly includes a low-temperature gas source, a low-temperature gas delivery pipe, and a cooling ring sleeved on the outside of the mounting spindle. The cooling ring is sleeved on the outside of the mounting spindle via a cooling ring support, which is fixed to the mounting base plate. The cooling ring has a cylindrical annular structure, with multiple gas delivery through holes opened radially on it. Each gas delivery through hole is connected to the low-temperature gas source via a low-temperature gas delivery pipe, enabling the low-temperature gas source to deliver low-temperature gas to the outer surface of the mounting spindle through the low-temperature gas delivery pipe and the gas delivery through holes to achieve cooling.

[0010] Furthermore, the cooling ring is sleeved on the outer surface of the mounting spindle, with a certain gap reserved between it and the mounting spindle.

[0011] Furthermore, the cooling ring has four gas delivery through holes, and the four gas delivery through holes are evenly arranged along the circumference of the cooling ring.

[0012] Furthermore, the winding shape of the electromagnetic heating coil is matched with the end face shape of the test bearing, with no obstructions between them and a gap of 1-1.5mm.

[0013] Furthermore, a groove for winding the electromagnetic heating coil is provided circumferentially on the outer surface of the electromagnetic heating ring.

[0014] Furthermore, both the intake disc and the sealing disc are provided with multiple threaded holes for fixing them together, and the intake disc and the sealing disc are sealed by sealing rings and sealant on their mating surfaces. The intake disc and the sealing disc are also provided with sealing ring grooves for accommodating the sealing rings, and the sealing ring grooves are located on the outside of the gas flow channel.

[0015] Furthermore, the axial force loading assembly includes a fixed base, a hydraulic cylinder, an axial force push rod, an axial force loading disc, and a pressure sensor. The axial force loading disc has an annular disc structure. One end of the annular disc axial force loading disc is in contact with the end face of the test bearing away from the cooling protection assembly. The other end of the annular disc axial force loading disc is connected to one end of the axial force push rod. A pressure sensor for detecting the magnitude of the axial loading force on the end face of the test bearing is also provided at the connection between the axial force loading disc and the axial force push rod. The other end of the axial force push rod is connected to the piston rod of the hydraulic cylinder. The hydraulic cylinder is mounted on the fixed base, which is fixed to the mounting base plate. The fixed base is also provided with a push rod guide rail for directional movement of the axial force push rod. The axial force loading disc is also provided with a chamber end cap for sealing the chamber where the rolling elements of the test bearing are located at one end connected to the axial force push rod. The chamber end cap has multiple vent holes for balancing the pressure inside the chamber.

[0016] Furthermore, the test apparatus also includes a control mechanism, which is connected to the drive assembly, cooling protection assembly, bearing heating assembly, and axial force loading assembly. This control mechanism controls the drive assembly to supply power to the test bearing at different speeds; controls the cooling protection assembly to cool the outer surface of the spindle during operation within a certain temperature range; controls the bearing heating assembly to measure the temperature of the test bearing surface, start and stop the electromagnetic heating coil, start and stop the gas atmosphere heating and cooling of the test bearing surface, and adjust the flow rate of the constant-temperature gas in the constant-temperature gas delivery pipeline; and controls the axial force loading assembly to adjust the magnitude of the axial force loading on the end face of the test bearing.

[0017] Beneficial effects:

[0018] 1. The high-speed rolling bearing high-temperature environment simulation test device of the present invention adopts the electromagnetic heating principle, supplemented by constant temperature air atmosphere heating, to controllably heat the test bearing. It can quickly, efficiently, and reliably achieve controllable temperature regulation of the test bearing, and ensure the uniformity and stability of the overall temperature of the test bearing. This enables the detection and control of the ambient temperature inside the test bearing cavity, thereby meeting the needs of research on the mechanisms of rolling bearing temperature field changes, friction, and heat transfer. The test results have high reliability and good repeatability, which is of great significance for predicting the service life and comprehensive performance of rolling bearings.

[0019] 2. The high-speed rolling bearing high-temperature environment simulation test device of the present invention can neutralize the large amount of heat conducted by the mounting spindle to the drive motor when the test bearing is tested under high temperature conditions by setting a cooling protection component on the mounting spindle, so as to protect the structural temperature inside the drive motor from being too high, thereby achieving cooling protection of the drive component and extending its service life.

[0020] 3. The high-speed rolling bearing high-temperature environment simulation test device of the present invention, by setting a uniquely structured flow stabilizer in the bearing heating assembly, can better ensure that the constant temperature gas is stably distributed after being input into the flow stabilizer from the gas source before entering the bearing chamber, so as to maximize the uniformity of temperature in all parts of the test bearing.

[0021] 4. The high-speed rolling bearing high-temperature environment simulation test device of the present invention can achieve better automated control of the entire test device by setting a control mechanism in the device, thereby enhancing the overall controllability and test accuracy of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 for Figure 1 Exploded view;

[0024] Figure 3 Schematic diagram of the electromagnetic heating ring Figure 1 ;

[0025] Figure 4 Schematic diagram of the electromagnetic heating ring Figure 2 ;

[0026] Figure 5 A schematic diagram of the longitudinal section structure of the assembled electromagnetic heating ring.

[0027] Figure 6 This is a schematic diagram of the intake disc.

[0028] Figure 7 This is a schematic diagram of the structure of the sealing disc;

[0029] Figure 8 A flowchart illustrating the process of heating the test bearing using a bearing heating assembly.

[0030] Figure 9 This is a schematic diagram of the cooling ring structure;

[0031] Figure 10 This is a schematic diagram of the axial force loading assembly;

[0032] Figure 11 This is a schematic diagram of the axial force loading disk.

[0033] Figure Descriptions: 1. Mounting base plate; 2. Test bearing; 3. Mounting spindle; 4. Electromagnetic heating ring; 5. Heating ring base; 6. Constant temperature gas delivery pipeline; 7. Electromagnetic heating coil; 8. Constant temperature gas inlet; 9. Temperature detection hole; 10. Inlet disc; 11. Sealing disc; 12. Gas flow channel; 13. Gas source inlet; 14. Nozzle; 15. Chamber; 16. Drive motor; 17. Motor base; 18. Low temperature gas delivery pipeline; 19. Cooling ring; 20. Cooling ring support; 21. Gas delivery through hole; 22. Mounting threaded hole; 23. Sealing ring groove; 24. Weight removal hole; 25. Fixed base; 26. Hydraulic cylinder; 27. Axial force push rod; 28. Axial force loading plate; 29. ​​Pressure sensor; 30. Chamber end cover; 31. Sensor groove. Detailed Implementation

[0034] The technical solution of the present invention will be further described and explained in detail below with reference to the accompanying drawings and specific embodiments.

[0035] As shown in the figure, a high-speed rolling bearing high-temperature environment simulation test device is provided. The test device adopts the electromagnetic heating principle, and the test bearing 2 is heated by heating wire wrapped around the bearing housing. It also includes a temperature detection and adjustment component, an axial force loading component, and a drive motor temperature protection mechanism, which realizes the detection and control of the ambient temperature of the test bearing 2 in the chamber 15 within the temperature range of 20-180℃.

[0036] A high-speed rolling bearing high-temperature environment simulation test device specifically includes a mounting base plate 1 and a test bearing 2, a drive assembly, a cooling protection assembly, a bearing heating assembly, and an axial force loading assembly mounted on the mounting base plate 1. The drive assembly includes a drive motor 16 and a horizontally arranged rotatable mounting spindle 3. The drive motor 16 is fixed to the mounting base plate 1 via a motor base 17. The mounting spindle 3 is connected to the output shaft of the drive motor 16. The test bearing 2 and the cooling protection assembly are both mounted on the mounting spindle 3. The test bearing 2 can rotate under the drive of the mounting spindle 3. The cooling protection assembly is assembled between the test bearing 2 and the power input end of the mounting spindle 3 for cooling the mounting spindle 3 during high-temperature operation. The axial force loading assembly is located at one end of the mounting spindle 3 and acts on the end face of the test bearing 2 away from the cooling protection assembly to apply axial force to the test bearing 2. The testing apparatus also includes a control mechanism, which is connected to the drive assembly, cooling protection assembly, bearing heating assembly, and axial force loading assembly. The control mechanism is used to control the drive assembly to supply power to the test bearing 2 at different speeds; to control the cooling protection assembly to cool the outer surface of the spindle 3 when it is operating within a certain temperature range; to control the bearing heating assembly to measure the temperature of the surface of the test bearing 2, start and stop the electromagnetic heating coil 7, start and stop the gas atmosphere heating and cooling of the surface of the test bearing 2, and adjust the flow rate of the constant temperature gas in the constant temperature gas delivery pipeline 6; and to control the axial force loading assembly to adjust the axial force loading on the end face of the test bearing 2.

[0037] The bearing heating assembly includes an electromagnetic heating ring 4, a heating ring base 5, a constant temperature gas source, a constant temperature gas delivery pipe 6, and a flow stabilizer. The electromagnetic heating ring 4 is fixed to the mounting base 1 via the heating ring base 5. The electromagnetic heating ring 4 is sleeved on the outside of the test bearing 2 and can cover the outer surface of the outer ring of the test bearing 2 and one end face near the cooling protection assembly. An electromagnetic heating coil 7 is provided inside the electromagnetic heating ring 4. The electromagnetic heating coil 7 is in direct contact with the end face of the test bearing 2 and is designed to fit the shape of the end face of the test bearing 2. A groove for winding the electromagnetic heating coil 7 is provided circumferentially on the outer surface of the electromagnetic heating ring 4. Multiple constant temperature gas inlets 8 are provided on the electromagnetic heating ring 4 and are connected to the chamber 15 where the rolling elements of the test bearing 2 are located. The electromagnetic heating ring 4 also has a temperature detection hole 9 for measuring the temperature of the test bearing 2.

[0038] The flow stabilizer has an annular disc structure, with its clamp located on the outside of the mounting spindle 3. The flow stabilizer is vertically divided into an intake disc 10 and a sealing disc 11, which are joined together on the left and right sides. Both the intake disc 10 and the sealing disc 11 have gas channels 12 and gas inlets 13 on their mating surfaces. The gas channels 12 are annular, and the gas inlets 13 are evenly distributed along the circumference of the annular gas channels 12. Multiple nozzles 14 are also evenly distributed circumferentially on the gas channels 12 of the intake disc 10, and these nozzles 14 correspond one-to-one with multiple constant-temperature gas inlets 8 on the electromagnetic heating ring 4. Both the intake disc 10 and the sealing disc 11 have multiple threaded holes 22 for fixing them together. The air inlet disc 10 and the sealing disc 11 are sealed together on their mating surfaces by a sealing ring and sealant. The air inlet disc 10 and the sealing disc 11 are also provided with sealing ring grooves 23 for accommodating the sealing rings. The sealing ring grooves 23 are located on the outside of the gas flow channel 12. The gas flow channel 12 and the gas source inlet 13 on the air inlet disc 10 are matched and correspond to the gas flow channel 12 and the gas source inlet 13 on the sealing disc 11, so that a constant temperature gas channel is formed in the middle of the flow stabilizer, which is connected to the chamber 15 where the rolling element of the test bearing 2 is located. The constant temperature gas channel is connected to the external constant temperature gas source through the gas source inlet 13 and the constant temperature gas delivery pipe 6, and is used to deliver constant temperature gas to the surface of the test bearing 2 for gas atmosphere heating and cooling.

[0039] The aforementioned flow stabilizer is a self-designed structure. Constant-temperature air is fed into the flow stabilizer from a constant-temperature gas source via a constant-temperature gas delivery pipe 6, where it is evenly distributed before entering the chamber 15 of the test bearing 2, ensuring that the temperature of all parts of the test bearing 2 is as uniform as possible. The flow stabilizer adopts a vertically split structure, consisting of an intake disc 10 (the intake end) and a sealing disc 11 (the non-intake end). The interior is partially sealed with a special sealing rubber ring. Furthermore, during assembly, high-temperature resistant sealant is applied to the split surface of the intake disc 10 and the sealing disc 11 to achieve a sealing effect. Four nozzles 14, each with a diameter of 4mm, are evenly distributed on the gas flow channel 12 of the intake disc 10. The gas enters the electromagnetic heating ring 4 through the nozzles 14 and then enters the bearing chamber 15. On the other side of the bearing chamber 15, this test apparatus is equipped with a chamber end cap 30 made of high-temperature resistant transparent quartz glass material to retain as much heat as possible in the chamber 15. The chamber end cap 30 has four 4mm diameter air outlet holes to balance the airflow in and out of the chamber 15.

[0040] The test apparatus of the present invention places the test bearing 2 inside an electromagnetic heating ring 4 that can simultaneously heat the end face and the outer circle of the outer ring of the test bearing 2. The electromagnetic heating ring 4 adopts the principle of electromagnetic heating, that is, an alternating magnetic field is generated by the components of the electronic circuit board. When the iron electromagnetic heating ring 4 is placed outside the heating circuit, the surface of the electromagnetic heating ring 4 cuts the alternating magnetic field lines to generate an alternating current (i.e., eddy current). The eddy current causes the charge carriers in the contact part of the electromagnetic heating ring 4 to move at high speed and randomly. The charge carriers collide and rub against each other to generate heat energy.

[0041] To ensure uniform heating of all parts of the test bearing 2, the test apparatus simultaneously winds the wires from the electromagnetic heating coil 7 around the outer side of the outer ring of the test bearing 2 and the outer side of one end face of the test bearing 2. Furthermore, the winding shape of the heating wires on the end face of the test bearing 2 is designed to closely match the shape of the bearing 2, minimizing the spatial distance between the bearing body and the heating wires, resulting in more uniform and efficient heating. A cross-sectional diagram of the specific winding method is attached. Figure 5 As shown ("·" indicates that the current in the conductor flows perpendicular to the paper and outwards, and "+" indicates that the current in the conductor flows perpendicular to the paper and inwards).

[0042] When the bearing heating assembly of the test device of the present invention is working, the electromagnetic heating ring 4 has high heating efficiency, poor controllability, and poor heating uniformity. Therefore, in addition to using the electromagnetic heating ring 4 to heat the test bearing 2, this test device adopts the method of introducing constant temperature air to maintain the constant temperature environment of the test bearing 2.

[0043] The constant-temperature air is sourced from an external constant-temperature air source (the air source can be switched between 20-180℃). When the real-time temperature of the test bearing 2 reaches the required test temperature, the equipment stops electromagnetic heating and begins to introduce constant-temperature air to maintain the temperature of the bearing chamber 15 and the test bearing 2 itself at a constant level near the set temperature (error ≤ 0.5℃). The specific heating process of the test bearing using the bearing heating assembly is shown in the attached figure. Figure 8 As shown.

[0044] The cooling protection assembly includes a low-temperature gas source, a low-temperature gas delivery pipe 18, and a cooling ring 19 fitted on the outside of the mounting spindle 3. The cooling ring 19 is fitted on the outside of the mounting spindle 3 through a cooling ring support 20, which is fixed to the mounting base plate 1. The cooling ring 19 is fitted on the outer surface of the mounting spindle 3 and a certain gap is reserved between it and the mounting spindle 3 to facilitate heat dissipation. The cooling ring 19 has a columnar annular structure and multiple gas delivery holes 21 are opened radially on it. Each gas delivery hole 21 is connected to the low-temperature gas source through the low-temperature gas delivery pipe 18, so that the low-temperature gas source can deliver low-temperature gas to the outer surface of the mounting spindle 3 through the low-temperature gas delivery pipe 18 and the gas delivery hole 21 to achieve cooling. There are four gas delivery holes 21 on the cooling ring 19, and the four gas delivery holes 21 are evenly arranged along the circumference of the cooling ring 19.

[0045] When the bearing chamber 15 of this test apparatus needs to reach the test temperature of 180°C, a large amount of heat will be conducted from the test bearing 2 end to the drive shaft of the drive motor 16 through the mounting spindle 3. In order to protect the internal structure of the drive motor 16 from being damaged due to excessive temperature, this test apparatus is designed with the above-mentioned cooling protection component, namely the electrically mounted spindle protection mechanism.

[0046] The cooling protection assembly includes a cooling ring 19, a cooling ring support 20, a cryogenic gas source, and a cryogenic gas delivery pipe 18. The cryogenic gas supplied by the cryogenic gas source is delivered to the cooling ring 18 through the cryogenic gas delivery pipe 18. The gas delivery through-hole 21 on the cooling ring 18 sprays the cooling gas onto the mounting spindle 3 to achieve cooling. The cooling ring 19 is fitted onto the mounting spindle 3 but does not directly contact it; instead, it is fixed by the cooling ring support 20 below. When the user-input temperature exceeds 50°C, the cooling protection assembly of this device is activated.

[0047] To achieve axial force loading, this test apparatus is further equipped with an axial force loading component. This component includes a fixed base 25, a hydraulic cylinder 26, an axial force push rod 27, an axial force loading disc 28, and a pressure sensor 29, and is connected to the control structure. The axial force loading disc 28 has an annular disc shape. One end of the annular disc-shaped axial force loading disc 28 is in contact with the end face of the test bearing 2 furthest from the cooling protection component, and the other end face is connected to one end of the axial force push rod 27. A detection device is also provided at the connection point between the axial force loading disc 28 and the axial force push rod 27. The pressure sensor 29 on the end face of the test bearing 2 measures the axial loading force. The other end of the axial force push rod 27 is connected to the piston rod of the hydraulic cylinder 26. The hydraulic cylinder 26 is mounted on a fixed base 25, which is fixed to the mounting base 1. The fixed base 25 is also provided with a push rod guide rail for the axial force push rod 27 to move in a directional manner. The axial force loading disk 28 is provided with a chamber end cover 30 at one end connected to the axial force push rod 27 to seal the chamber 15 where the rolling elements of the test bearing 2 are located. The chamber end cover 30 has multiple vent holes for balancing the pressure inside the chamber 15. The axial force push rod 27 is integrally cast from 45# steel. After the piston of the hydraulic cylinder 26 applies a load to the force application point of the hydraulic cylinder 26, the axial force push rod 27 converts the load into an axial force applied to the pressure sensor 29. In order to make the axial force push rod 27 move in a plane as much as possible, a guide rail is provided at the lower end of the axial force push rod 27 in this experimental device.

[0048] In practical use, the axial force loading assembly controls the magnitude of the axial force according to the input command. The axial force loading disk 28 is in direct contact with one end face of the test bearing 2. The end face of the axial force loading disk 28 connected to the axial force push rod 27 is also provided with two pressure sensor slots 31, which contain two pressure sensors 29. The pressure applied by the hydraulic cylinder 26 is transmitted to the pressure sensors 29 via the axial force push rod 27 and then axially pressurizes the end face of the test bearing 2 via the axial force loading disk 28, thereby simulating the axial force of the test bearing 2.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the entire scope of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make formal modifications to the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. All formal modifications and equivalent substitutions made within the scope of the concept and teaching of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-speed rolling bearing high-temperature environment simulation test device, comprising a mounting base plate (1) and a test bearing (2), a drive assembly, a cooling protection assembly, a bearing heating assembly, and an axial force loading assembly mounted on the mounting base plate (1), characterized in that: The drive assembly includes a horizontally rotatable mounting spindle (3), on which the test bearing (2) and the cooling protection assembly are mounted. The test bearing (2) can rotate under the drive of the mounting spindle (3). The cooling protection assembly is mounted between the test bearing (2) and the power input end of the mounting spindle (3) for cooling the mounting spindle (3) during high-temperature operation. The axial force loading assembly is located at one end of the mounting spindle (3) and acts on the end face of the test bearing (2) away from the cooling protection assembly for applying axial force to the test bearing (2). The bearing heating assembly includes an electromagnetic heating ring (4), a heating ring base (5), a constant temperature gas source, a constant temperature gas delivery pipe (6), and a flow stabilizer. The electromagnetic heating ring (4) is fixed on the mounting base plate (1) through the heating ring base (5). The electromagnetic heating ring (4) is sleeved on the outside of the test bearing (2) and can cover the outer side of the outer ring of the test bearing (2) and one end face near the cooling protection assembly. An electromagnetic heating coil (7) is provided inside the electromagnetic heating ring (4). Multiple constant temperature gas inlets (8) are provided on the electromagnetic heating ring (4) and are connected to the chamber (15) where the rolling elements of the test bearing (2) are located. The electromagnetic heating ring (4) is also provided with a temperature detection hole (9) for measuring the temperature of the test bearing (2). The flow stabilizer has an annular disc structure, and its clamp is located on the outside of the mounting spindle (3). The flow stabilizer is vertically split into an intake disc (10) and a sealing disc (11) arranged side to side along its radial direction. Both the intake disc (10) and the sealing disc (11) have gas channels (12) and gas inlets (13) on their mating surfaces. The gas channels (12) are annular, and the gas inlets (13) are evenly arranged along the circumference of the annular gas channels (12). On the mating surfaces of the intake disc (10) and the sealing disc (11), a sealing ring groove (23) and a sealing ring are also provided on the outside of the gas channels (12) to achieve the mating surfaces The radial seal between the air intake disc (10) and the gas flow channel (12) of the air intake disc (10) are also provided with multiple nozzles (14) evenly distributed circumferentially. The multiple nozzles (14) correspond one-to-one with the multiple constant temperature gas inlets (8) on the electromagnetic heating ring (4). The gas flow channel (12) and gas source inlet (13) on the air intake disc (10) correspond left and right with the gas flow channel (12) and gas source inlet (13) on the sealing disc (11). This makes the middle part of the flow stabilizer form a constant temperature gas channel that is connected to the chamber (15) where the rolling element of the test bearing (2) is located. The constant temperature gas channel is connected to the outside constant temperature gas through the gas source inlet (13) and the constant temperature gas delivery pipe (6). The constant temperature air is connected to the constant temperature gas source and enters the chamber of the test bearing after being stably distributed by the constant temperature gas delivery pipe (6) through the constant temperature gas source; the cooling protection component includes a low temperature gas source, a low temperature gas delivery pipe (18) and a cooling ring (19) sleeved on the outside of the mounting spindle (3). The cooling ring (19) is sleeved on the outside of the mounting spindle (3) through a cooling ring support (20). The cooling ring support (20) is fixed on the mounting base plate (1). The cooling ring (19) has a columnar circular structure. Multiple gas delivery through holes (21) are opened on the cooling ring (19) along its radial direction. Each gas delivery through hole (21) is connected to a low temperature gas delivery pipe ( 18) Connect to a low-temperature gas source so that the low-temperature gas source can transport the low-temperature gas to the outer surface of the mounting spindle (3) through the low-temperature gas delivery pipe (18) and the gas delivery through hole (21) to achieve cooling; the air inlet disc (10) and the sealing disc (11) are provided with multiple mounting threaded holes (22) for fixing the two together, and the air inlet disc (10) and the sealing disc (11) are sealed by sealing rings and sealant on their mating surfaces. The air inlet disc (10) and the sealing disc (11) are also provided with sealing ring grooves (23) for accommodating the sealing rings, and the sealing ring grooves (23) are located on the outside of the gas flow channel (12).

2. The high-speed rolling bearing high-temperature environment simulation test device according to claim 1, characterized in that: The drive assembly includes a drive motor (16) and a mounting spindle (3), wherein the drive motor (16) is fixed on the mounting base plate (1) by a motor base (17), and the mounting spindle (3) is connected to the output shaft of the drive motor (16).

3. The high-speed rolling bearing high-temperature environment simulation test device according to claim 1, characterized in that: The cooling ring (19) is sleeved on the outer side of the mounting spindle (3) and a certain gap is reserved between it and the mounting spindle (3).

4. The high-speed rolling bearing high-temperature environment simulation test device according to claim 1, characterized in that: The cooling ring (19) has four gas delivery through holes (21), and the four gas delivery through holes (21) are evenly arranged along the circumference of the cooling ring (19).

5. The high-speed rolling bearing high-temperature environment simulation test device according to claim 1, characterized in that: The electromagnetic heating coil (7) is designed to fit the end face of the test bearing (2).

6. The high-speed rolling bearing high-temperature environment simulation test device according to claim 1, characterized in that: A groove for winding the electromagnetic heating coil (7) is provided along the circumference on the outer surface of the electromagnetic heating ring (4).

7. The high-speed rolling bearing high-temperature environment simulation test device according to claim 1, characterized in that: The axial force loading assembly includes a fixed base (25), a hydraulic cylinder (26), an axial force push rod (27), an axial force loading disk (28), and a pressure sensor (29). The axial force loading disk (28) has an annular disc structure. One end of the annular disc axial force loading disk (28) is in contact with the end face of the test bearing (2) away from the cooling protection assembly. The other end face of the annular disc axial force loading disk (28) is connected to one end of the axial force push rod (27). A pressure sensor for detecting the magnitude of the axial loading force on the end face of the test bearing (2) is also provided at the connection between the axial force loading disk (28) and the axial force push rod (27). (29) The other end of the axial force push rod (27) is connected to the piston rod of the hydraulic cylinder (26). The hydraulic cylinder (26) is mounted on the fixed base (25), which is fixed on the mounting base plate (1). The fixed base (25) is also provided with a push rod guide for the axial force push rod (27) to move in a direction. The axial force loading disk (28) is also provided with a chamber end cover (30) at one end of its connection to the axial force push rod (27) for sealing the chamber (15) where the rolling elements of the test bearing (2) are located. The chamber end cover (30) is provided with multiple air outlets for balancing the pressure inside the chamber (15).

8. The high-speed rolling bearing high-temperature environment simulation test device according to claim 1, characterized in that: The test apparatus also includes a control mechanism, which is connected to the drive assembly, cooling protection assembly, bearing heating assembly and axial force loading assembly respectively. The control mechanism is used to control the drive assembly to supply power to the test bearing (2) at different speeds; control the cooling protection assembly to cool the outer surface of the spindle (3) when it is operating within a certain temperature range; control the bearing heating assembly to measure the temperature of the surface of the test bearing (2), start and stop the electromagnetic heating coil (7), start and stop the gas atmosphere heating and cooling of the surface of the test bearing (2), and adjust the flow rate of the constant temperature gas in the constant temperature gas delivery pipeline (6); and control the axial force loading assembly to adjust the axial force loading on the end face of the test bearing (2).

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