Swing wear test device for knuckle bearing in high-temperature salt spray environment

Abstract

The utility model relates to the technical field of bearing testing, in particular to a swing wear test device for a knuckle bearing in a high-temperature salt-spray environment. The device comprises a fixing mechanism, a power mechanism and an environment simulation mechanism, the fixing mechanism comprises a first bearing seat, the first bearing seat is used for fixing a joint bearing, and the first bearing seat is provided with a salt mist through hole in the radial direction of the joint bearing; the power mechanism comprises a power assembly and a transmission shaft, the power assembly is connected with the transmission shaft to drive the transmission shaft to rotate, and the transmission shaft extends into an inner ring of the knuckle bearing and drives the knuckle bearing to rotate so as to provide active torque for swinging of the knuckle bearing; the environment simulation mechanism comprises a box body, a heating assembly and a salt mist assembly, the salt mist assembly and the heating assembly are located in the box body, the salt mist assembly is arranged towards the salt mist through hole so that salt mist can enter the knuckle bearing, and the heating assembly heats the bearing seat to increase the temperature of the bearing; through the components, the abrasion change condition of the knuckle bearing in the high-temperature salt mist environment is obtained.

Description

Technical Field

[0001] This utility model relates to the field of bearing testing technology, and in particular to a test device for oscillation wear of spherical bearings under high temperature salt spray environment. Background Technology

[0002] Spherical plain bearings are a type of bearing capable of withstanding large loads and moving flexibly. Due to their advantages such as compact structure, strong self-aligning ability, and good adaptability to impact loads, they are widely used in key parts of aerospace, mechanical engineering, wind power equipment and other fields.

[0003] Spherical plain bearings are often subjected to complex loads, high temperature salt spray, vacuum environments, and other working conditions. Under heavy load and wear, the coating of the spherical plain bearing will gradually wear away, leading to structural failure.

[0004] Currently, testing the service performance of spherical plain bearings using test benches is one of the important methods. While various wear test benches for spherical plain bearings are provided in related technologies, evaluating their performance from different perspectives, they lack the capability for testing under high-temperature salt spray conditions.

[0005] Therefore, there is an urgent need for a test device for the oscillation wear of spherical bearings under high temperature and salt spray conditions to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to provide a test device for the oscillation wear of spherical bearings under high temperature and salt spray conditions, which can test spherical bearings under high temperature and salt spray conditions.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A test apparatus for oscillating wear of spherical plain bearings under high temperature and salt spray conditions is provided, comprising:

[0009] The fixing mechanism includes a first bearing housing for fixing a spherical bearing, and the first bearing housing has a salt spray through hole along the radial direction of the spherical bearing.

[0010] A power mechanism includes a power component and a drive shaft, wherein the power component is connected to the drive shaft to drive the drive shaft to rotate, and the drive shaft is used to extend into the inner ring of the spherical bearing and drive the spherical bearing to rotate.

[0011] An environmental simulation mechanism includes a housing, a salt spray assembly, and a heating assembly. The salt spray assembly and the heating assembly are located inside the housing. The salt spray assembly is positioned toward the salt spray through-hole to allow salt spray to enter the joint bearing. The heating assembly is used to increase the temperature inside the housing.

[0012] As an optional technical solution for the joint bearing oscillation wear test device under the above-mentioned high temperature salt spray environment, the salt spray assembly includes a drive pump and a salt spray nozzle. The inlet of the drive pump is connected to a salt spray source, and the outlet of the drive pump is connected to the salt spray nozzle through a salt spray pipe. The salt spray nozzle sprays out salt spray.

[0013] As an optional technical solution for the above-mentioned test device for spherical bearing oscillation wear under high temperature and salt spray environment, the heating component includes a heating element and a heating support platform. The heating support platform is located in the area enclosed by the box body. The heating support platform is set at the bottom of the fixing mechanism. The heating element is fixed to the heating support platform to provide heat to the heating support platform.

[0014] As an optional technical solution for the above-mentioned high-temperature salt spray environment spherical bearing oscillation wear test device, the first bearing seat is provided with a mounting hole for installing the spherical bearing, and the fixing mechanism further includes a clamping member and a friction member. The clamping member and the friction member are disposed in the mounting hole, and the clamping member is fixedly connected to the first bearing seat. Along the axial direction of the mounting hole, the clamping member and the friction member are located on both sides of the spherical bearing, and the friction member is disposed between the clamping member and the spherical bearing.

[0015] As an optional technical solution for the above-mentioned high-temperature salt spray environment spherical bearing oscillation wear test device, the transmission shaft includes a first shaft, a second shaft, and an elastic mounting sleeve. The first shaft and the second shaft are respectively fixedly connected to two first flanges of the elastic mounting sleeve. The first end of the second shaft is connected to the power component. A second flange is provided at one end of the first shaft facing the elastic mounting sleeve and at the second end of the second shaft. The first flange and the second flange are fixedly connected. A conical platform is provided on one side of the second flange facing the first flange. A conical connecting hole is provided along the axial direction of the elastic mounting sleeve. The conical platform is located in the conical connecting hole, and the volume of the conical platform is larger than the volume of the conical connecting hole.

[0016] As an optional technical solution for the above-mentioned test device for spherical bearing oscillation wear under high temperature and salt spray environment, the transmission shaft also includes a third shaft and a torque limiter. The torque limiter connects the second shaft and the third shaft, and the third shaft is connected to the power component.

[0017] As an optional technical solution for the above-mentioned high-temperature salt spray environment spherical bearing oscillation wear test device, the high-temperature salt spray environment spherical bearing oscillation wear test device further includes a loading mechanism. The loading mechanism is located directly above the fixing mechanism. The loading mechanism includes a support frame, a pressure sensor, a first driving member, and a loading member. The first driving member is fixed to the top of the support frame. The pressure sensor is disposed between the first driving member and the loading member. The driving rod of the first driving member passes through the support frame and is fixedly connected to the loading member. The loading member is located in the area enclosed by the support frame and contacts the first bearing seat. The loading member is located inside the housing.

[0018] As an optional technical solution for the above-mentioned test device for spherical bearing oscillation wear under high temperature and salt spray environment, the loading mechanism further includes a cooling structure and a loading shaft. The first driving member and the loading member are connected through the loading shaft. The pressure sensor is located between the first driving member and the loading shaft. The cooling structure is sleeved on the outer periphery of the loading shaft.

[0019] As an optional technical solution for the above-mentioned test device for the oscillation wear of spherical bearings under high temperature and salt spray environment, the power component includes a motor and a connecting coupling. The output shaft of the motor is connected to the transmission shaft through the connecting coupling. The power mechanism also includes an absolute encoder and a torque sensor. The torque sensor is used to obtain the torque change value of the spherical bearing, and the absolute encoder is used to obtain the oscillation angle of the spherical bearing.

[0020] As an optional technical solution for the joint bearing oscillation wear test device under the above-mentioned high temperature and salt spray environment, it also includes a heat dissipation mechanism, which includes a heat sink and a cooling fan. The heat sink is attached to the drive shaft, and the cooling fan is located on one side of the drive shaft.

[0021] This utility model has at least the following beneficial effects:

[0022] The first bearing housing provides fixed support for the spherical plain bearing and has a salt spray through hole. The salt spray component of the environmental simulation mechanism introduces salt spray into the salt spray through hole, and the heating component heats the spherical plain bearing, so that the spherical plain bearing is in a high-temperature salt spray environment during the test. In addition, the power mechanism provides rotational power to the spherical plain bearing, thereby providing rotational force to the spherical plain bearing, so that the spherical plain bearing can wear under the high-temperature salt spray environment, so as to obtain the wear changes of the spherical plain bearing under the high-temperature salt spray environment. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1 A side view of the spherical bearing oscillation wear test device under high temperature salt spray environment provided in this embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the structure of the joint bearing swing wear test device under high temperature salt spray environment provided in this embodiment of the utility model (without support plate);

[0026] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0027] Figure 4 for Figure 2 A sectional view;

[0028] Figure 5 for Figure 4 Enlarged view of a section at point B in the middle;

[0029] Figure 6 for Figure 5 Enlarged view of a section at point C;

[0030] Figure 7 A front view of the test device for oscillating wear of spherical bearings under high temperature and salt spray environment provided in this embodiment of the present invention.

[0031] In the picture:

[0032] 1. Fixing mechanism; 11. First bearing housing; 111. Upper mounting base; 112. Lower mounting base; 12. Clamping component; 13. Friction component;

[0033] 2. Power mechanism; 21. Drive shaft; 211. First shaft; 212. Second shaft; 213. Flexible mounting sleeve; 214. First flange; 215. Second flange; 216. Tapered platform; 217. Third shaft; 218. Torque limiter; 210. Air bearing; 22. Motor; 23. Connecting coupling; 24. Torque sensor; 25. Absolute encoder; 26. Encoder bracket;

[0034] 3. Environmental simulation mechanism; 31. Enclosure; 311. Inner cover; 312. Outer cover; 313. Base plate; 314. Temperature sensor; 32. Drive pump; 33. Salt spray nozzle; 34. Salt spray pipeline; 35. Heating element; 36. Heating support platform; 37. Insulation platform;

[0035] 4. Loading mechanism; 41. Support frame; 42. First driving component; 43. Loading component; 44. Cooling structure; 45. Loading shaft; 46. Pressure sensor;

[0036] 5. Support plate;

[0037] 6. Cooling fan;

[0038] 100. Spherical plain bearing. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] To address the problem that current spherical plain bearing wear testing devices are limited in variety and cannot meet the testing requirements of spherical plain bearings in salt spray environments, this invention provides a spherical plain bearing oscillation wear testing device under high-temperature salt spray conditions. This device provides a high-temperature salt spray environment for spherical plain bearings during wear testing, enabling the bearings to be tested in a salt spray environment and obtaining the wear changes of the bearings under such conditions.

[0044] like Figures 1 to 3 As shown, the spherical plain bearing oscillation wear test device under high temperature salt spray environment includes a fixing mechanism 1, a power mechanism 2, and an environmental simulation mechanism 3. The fixing mechanism 1 includes a first bearing seat 11, which is used to fix the spherical plain bearing 100. The first bearing seat 11 has a salt spray through hole along the radial direction of the spherical plain bearing 100. The power mechanism 2 includes a power component and a transmission shaft 21. The power component is connected to the transmission shaft 21 to drive the transmission shaft 21 to rotate. The transmission shaft 21 is used to extend into the inner ring of the spherical plain bearing 100 and drive the spherical plain bearing 100 to rotate, thereby providing the active torque for the oscillation of the spherical plain bearing 100. The environmental simulation mechanism 3 includes a chamber 31, a heating component, and a salt spray component. The salt spray component is located inside the chamber 31 and is arranged facing the salt spray through hole to allow salt spray to enter the spherical plain bearing 100. The heating component is used to increase the temperature inside the chamber 31.

[0045] The first bearing housing 11 provides fixed support for the spherical plain bearing 100, and the first bearing housing 11 has a salt spray through hole. The salt spray component of the environmental simulation mechanism 3 introduces salt spray into the salt spray through hole, and the heating component heats the spherical plain bearing 100, so that the spherical plain bearing 100 is in a high-temperature salt spray environment during the test. In addition, the power mechanism 2 provides rotational power to the spherical plain bearing 100, thereby providing rotational force to the spherical plain bearing 100, so that the spherical plain bearing 100 can wear in the high-temperature salt spray environment, so as to obtain the wear change of the spherical plain bearing 100 in the high-temperature salt spray environment.

[0046] In some embodiments, combined with Figure 4 and Figure 5As shown, the enclosure 31 includes an inner cover 311, an outer cover 312, and a base plate 313. Vertically, the inner cover 311 and outer cover 312 are coaxially arranged and both are fixed to the base plate 313, specifically by welding. Both the inner cover 311 and outer cover 312 have through holes for the drive shaft 21 to pass through. The inner cover 311 can be a separate structure, and the outer cover 312 can be a separate structure. The inner cover 311 and outer cover 312 are sealed by a sealing structure, specifically, the sealing structure includes a sealing ring, and a receiving space is formed between the inner cover 311 and outer cover 312. This receiving space is filled with insulation material to ensure a constant temperature inside the enclosure 31. For example, insulation materials are mainly divided into organic insulation materials, inorganic insulation materials, and composite insulation materials. Organic insulation materials such as EPS and XPS have the advantages of good heat insulation and low production cost; inorganic insulation materials such as rock wool and glass wool have good fire resistance; composite insulation materials combine the advantages of organic and inorganic materials, are flame retardant and produce less smoke when burning.

[0047] like Figure 7 As shown, a temperature sensor 314 is also installed inside the housing 31. Specifically, the first bearing housing 11 is provided with a temperature detection hole 114 through which the probe of the temperature sensor 314 passes. The temperature sensor 314 is a thermocouple, which is located inside the temperature detection hole 114 and can contact the spherical plain bearing 100 to detect the ambient temperature of the spherical plain bearing 100. The housing 31 provides a sealed testing environment for the spherical plain bearing 100 to be tested and can acquire the temperature change of the spherical plain bearing 100 during the test.

[0048] In some embodiments, such as Figure 2 As shown, the salt spray assembly includes a drive pump 32 and a salt spray nozzle 33. The inlet of the drive pump 32 is connected to a salt spray source, for example, seawater. The outlet of the drive pump 32 is connected to the salt spray nozzle 33 through a salt spray pipe 34. The salt spray nozzle 33 sprays out salt spray, which acts on the spherical bearing 100 through the salt spray through-hole, thereby providing a salt spray environment for the spherical bearing 100.

[0049] The first bearing housing 11 is provided with two salt spray through holes, which are located on both sides of the spherical bearing 100 to facilitate the spraying of salt spray. The drive pump 32 is a peristaltic pump, and there are two drive pumps 32 and two salt spray nozzles 33. Each drive pump 32 is connected to one salt spray nozzle 33.

[0050] In addition, in order to achieve a high-temperature salt spray environment, combined with Figure 2 and Figure 5As shown, the environmental simulation mechanism 3 also includes a heating component, which includes a heating element 35 and a heating support platform 36. The heating support platform 36 is located within the area enclosed by the housing 31 and is positioned at the bottom of the fixing mechanism 1. The heating element 35 is fixed to the heating support platform 36 to provide heat to the heating support platform 36. The heating support platform 36 provides support for the first bearing seat 11 and transfers heat to the first bearing seat 11. The first bearing seat 11 then transfers heat to the spherical plain bearing 100. Due to thermal radiation, the environment around the first bearing seat 11 is also in a high-temperature environment, thereby ensuring that the spherical plain bearing 100 is entirely in a high-temperature and salt spray environment.

[0051] For example, the heating support 36 has eight mounting holes for mounting a heating element 35, which is an electric heating rod. The heating support 36 has a boss on the side facing the first bearing housing 11, and the first bearing housing 11 has a heating hole. The boss is located in the heating hole and directly contacts the spherical plain bearing 100 so as to heat the spherical plain bearing 100 through surface-to-surface contact.

[0052] In order to facilitate the transfer of heat from the heating support platform 36 to the first bearing housing 11, the heating assembly also includes a heat insulation platform 37. The heat insulation platform 37 is disposed between the base plate 313 and the heating support platform 36, that is, the heat insulation platform 37 supports the heating support platform 36, thereby transferring the heat from the heating support platform 36 to the first bearing housing 11 and providing a high-temperature environment for the first bearing housing 11.

[0053] like Figure 3 As shown, the first bearing housing 11 includes an upper mounting base 111 and a lower mounting base 112. Both the upper mounting base 111 and the lower mounting base 112 are provided with receiving grooves. The upper mounting base 111 and the lower mounting base 112 are fixedly connected. In this way, the mounting groove of the upper mounting base 111 and the mounting groove of the lower mounting base 112 are spliced ​​together to form a mounting hole that can accommodate the spherical plain bearing 100. In addition, the upper mounting base 111 and the lower mounting base 112 are fixedly connected by fasteners such as bolts. Both the upper mounting base 111 and the lower mounting base 112 are provided with connecting holes. The bolts pass through the connecting holes and are fastened to the clamping member 12. The clamping member 12 is provided with threaded holes and is threadedly connected to the bolts.

[0054] like Figure 6As shown, the first bearing housing 11 is provided with a mounting hole for mounting the spherical plain bearing 100 to support the spherical plain bearing 100. The fixing mechanism 1 also includes a clamping member 12 and a friction member 13. The clamping member 12 and the friction member 13 are disposed in the mounting hole, and the clamping member 12 is fixedly connected to the first bearing housing 11. Along the axial direction of the mounting hole, the clamping member 12 and the friction member 13 are located on both sides of the spherical plain bearing 100, and the friction member 13 is disposed between the clamping member 12 and the spherical plain bearing 100. It can be understood that on each side of the spherical plain bearing 100, there is a clamping member 12 and a friction member 13. The clamping member 12 is fixedly connected to the first bearing housing 11, specifically by screws. In this way, the clamping member 12 can cooperate with the spherical plain bearing 100 to press the friction member 13 tightly. The friction member 13 is in close contact with the outer ring of the spherical plain bearing 100, thereby fixing the outer ring of the spherical plain bearing 100 to ensure that the inner ring of the spherical plain bearing 100 can rotate with the drive shaft 21.

[0055] In some implementations, the drive shaft 21 includes a first shaft 211, a second shaft 212, and an elastic mounting sleeve 213. The elastic mounting sleeve 213 has a support sleeve and first flanges 214 located at both ends of the support sleeve. A second flange 215 is provided at the end of the first shaft 211 and the second shaft 212 facing the first flange 214. The first shaft 211 and the second shaft 212 are respectively fixedly connected to the two first flanges 214 of the elastic mounting sleeve 213, that is, the first flanges 214 are connected to the second flanges 215, so as to achieve the purpose of fixing the first shaft 211 and the second shaft 212 to the elastic mounting sleeve 213. The first end of the second shaft 212 is connected to the power assembly, thereby ensuring the power transmission of the power assembly. The second end of the second shaft 212 is provided with... A second flange 215 is provided, and a tapered platform 216 is provided on the side of the second flange 215 facing the first flange 214. A tapered connecting hole is provided axially on the elastic mounting sleeve 213. After the second shaft 212 is assembled with the elastic mounting sleeve 213, the tapered platform 216 is located within the tapered connecting hole. The volume of the tapered platform 216 is larger than the volume of the tapered connecting hole, thus the tapered platform 216 presses against the sidewall of the tapered connecting hole, causing the elastic mounting sleeve 213 to bulge outwards. This bulging of the elastic mounting sleeve 213 presses against the spherical plain bearing 100, thereby achieving an interference fit between the elastic mounting sleeve 213 and the spherical plain bearing 100. This achieves an interference connection between the drive shaft 21 and the inner ring of the spherical plain bearing 100, allowing the drive shaft 21 to rotate and drive the inner ring of the spherical plain bearing 100 to rotate. The central axes of the first shaft 211, the second shaft 212, and the elastic mounting sleeve 213 are collinear.

[0056] For example, the elastic mounting sleeve 213 is made of metal rubber, which can ensure the connection strength between the elastic mounting sleeve 213 and the first shaft 211 and the second shaft 212. In addition, the surface of the metal rubber is a non-smooth surface, which can increase the friction between the elastic mounting sleeve 213 and the inner ring of the spherical bearing 100, so that the inner ring of the spherical bearing 100 rotates with the drive shaft 21.

[0057] In some embodiments, such as Figure 1 As shown, the drive shaft 21 also includes a third shaft 217 and a torque limiter 218. The torque limiter 218 connects the second shaft 212 and the third shaft 217. The third shaft 217 is connected to the power assembly. The torque limiter 218 is used to limit the torque of the drive shaft 21. Specifically, the torque limiter 218 is a torque limiting coupling.

[0058] In some embodiments, such as Figure 2 As shown, the drive shaft 21 also includes two second bearing seats and two air bearings 210. The second bearing seats and the two air bearings 210 are arranged in a one-to-one correspondence. The air bearings 210 are installed in the second bearing seats. One air bearing 210 supports the first shaft 211, and the other air bearing 210 is used to support the second shaft 212. The two air bearings 210 play a supporting role for the spherical bearing 100.

[0059] In some embodiments, continue to refer to Figure 1 The power assembly includes a motor 22 and a connecting coupling 23. The output shaft of the motor 22 is connected to the drive shaft 21 via the connecting coupling 23 to drive the drive shaft 21 to rotate. The power mechanism 2 also includes an absolute encoder 25 and a torque sensor 24. The torque sensor 24 is used to obtain the torque change value of the spherical bearing, and the absolute encoder 25 is used to obtain the swing angle of the spherical bearing, thereby realizing closed-loop control of the swing angle of the spherical bearing 100. The torque limiter 218 is located on the side of the torque sensor 24 away from the motor 22 to limit the torque of the drive shaft 21.

[0060] It should be noted that the central axes of the various structures of the power mechanism 2 are arranged in a collinear manner, that is, the central axis of the motor 22, the central axis of the coupling, the central axis of the torque limiter 218, the central axis of the air bearing 210, and the central axis of the transmission shaft 21 are all arranged in a collinear manner to improve the detection accuracy.

[0061] Combination Figure 1 and Figure 2As shown, the spherical plain bearing 100 is subjected to radial pressure during actual use. Therefore, the spherical plain bearing oscillation wear test device under high temperature and salt spray conditions also includes a loading mechanism 4. The loading mechanism 4 is located directly above the fixing mechanism 1. The loading mechanism 4 includes a support frame 41, a first driving member 42, and a loading member 43. The first driving member 42 is fixed to the top of the support frame 41. The driving rod of the first driving member 42 passes through the support frame 41 and is fixedly connected to the loading member 43. The loading member 43 is located within the area enclosed by the support frame 41 and contacts the first bearing seat 11. Furthermore, the loading member 43 is located inside the housing 31 to achieve contact with the first bearing seat 11. For example, the first driving member 42 can be a hydraulic cylinder or an electric cylinder. The loading member 43 can be fixedly connected to the first bearing seat 11 to apply pressure to the first bearing seat 11. The loading force transmitted by the first driving member 42 is transmitted to the spherical plain bearing 100 through the first bearing seat 11 to achieve the purpose of applying a loading force to the spherical plain bearing 100.

[0062] Due to the heating component and the fixed connection between the loading member 43 and the first bearing housing 11, the first bearing housing 11 will conduct heat to the loading member 43 at high temperatures. The loading member 43 will then transfer heat to the pressure sensor 46, causing high temperatures that affect the accuracy of the pressure sensor 46. Therefore, the loading mechanism 4 also includes a cooling structure 44 and a loading shaft 45. The first driving member 42 is connected to the loading member 43 via the loading shaft 45, and the cooling structure 44 is fitted around the outer periphery of the loading shaft 45. The pressure sensor 46 is positioned between the loading shaft 45 and the first driving member 42. The cooling structure 44 cools the loading shaft 45, thus significantly reducing the heat transferred to the pressure sensor 46, ensuring the normal operation of the pressure sensor 46 and guaranteeing its detection accuracy.

[0063] The cooling structure 44 comprises a cooling inner sleeve, a cooling outer sleeve, and a cooling sealing plate. The cooling inner sleeve is located within the space formed by the cooling outer sleeve. The cooling inner sleeve, cooling sealing plate, and cooling outer sleeve together form a cooling cavity, and the cooling inner sleeve is fitted onto the loading shaft 45. The cooling sealing plate is located at the bottom of the cooling outer sleeve and the cooling inner sleeve, and is fixedly connected to the cooling outer sleeve and the cooling inner sleeve. The cooling sealing plate provides a seal for the cooling inner sleeve and the cooling outer sleeve, and also provides support for them. The cooling sealing plate is interference-fitted to the loading shaft 45 to ensure that the cooling structure 44 can be fixed on the loading shaft 45. The cooling outer sleeve has an inlet for coolant to flow through and an outlet for coolant to flow out. Both the inlet and outlet are connected to the cooling cavity, so that the coolant can enter the cooling cavity and exchange heat with the cooling inner sleeve. The loading shaft 45 transfers heat to the cooling inner sleeve through heat transfer. The cooling inner sleeve achieves the purpose of cooling by exchanging heat with the coolant, thereby achieving the purpose of cooling the loading shaft 45 as well, preventing the temperature from affecting the pressure sensor.

[0064] The central axes of all components of the loading mechanism 4 are arranged collinearly, that is, the central axis of the cooling structure 44, the central axis of the loading shaft 45, the central axis of the power assembly, and the central axis of the transmission shaft 21 are all arranged collinearly.

[0065] like Figure 1 As shown, the swing wear test device also includes a support plate 5, and the power mechanism 2, the environmental simulation mechanism 3 and the fixing mechanism 1 are all fixed on the support plate 5.

[0066] For example, the power mechanism 2 also includes an encoder bracket 26, an absolute encoder 25 is bolted to the encoder bracket 26, and the encoder bracket 26 is bolted to the support plate 5.

[0067] In some embodiments, the joint bearing swing wear test device under high temperature and salt spray environment further includes a heat dissipation mechanism, which includes a heat sink and a cooling fan 6. The heat sink is attached to the drive shaft 21 for heat dissipation, and the cooling fan 6 is located on one side of the drive shaft 21 to enhance the transfer of temperature.

[0068] This invention relates to a high-temperature salt spray environment spherical plain bearing oscillation wear testing device. The environmental simulation mechanism 3 simulates the operating state of the spherical plain bearing 100 under salt spray conditions and oscillation wear. The cooling structure 44 prevents damage to the pressure sensor caused by high temperatures. The first driving component 42 generates a radial load, enabling wear variations under different loads. This invention satisfies the wear variation process of the spherical plain bearing 100 under different operating conditions, which is of great significance for maintaining the normal operation of mechanical equipment and provides good support for the performance evaluation of high-performance spherical plain bearings 100.

[0069] The working process of this high-temperature salt spray environment joint bearing oscillation wear test device is as follows:

[0070] First, pass one end of the elastic mounting sleeve 213 through the spherical bearing 100, so that the two first flanges 214 of the elastic mounting sleeve 213 are exposed in the spherical bearing 100. Then, connect the second flange 215 of the first shaft 211 to one of the first flanges 214 of the elastic mounting sleeve 213. After inserting the tapered platform 216 of the second shaft 212 into the tapered connecting hole of the elastic mounting sleeve 213 and installing it in place, fix the other first flange 214 of the elastic mounting sleeve 213 to the second flange 215 of the second shaft 212. The assembled spherical plain bearing 100 is then placed in the mounting groove of the lower mounting base 112. The clamping member 12 and friction member 13 are then sequentially placed into the mounting groove of the lower mounting base 112, and the clamping member 12 is fixedly connected to the lower mounting base 112. The upper mounting base 111 is then fastened to the lower mounting base 112 and connected to the lower mounting base 112 with bolts. The upper mounting base 111 is then fixedly connected to the clamping member 12, confining the spherical plain bearing 100 within the first bearing housing 11. The spherical plain bearing 100 and the bearing housing are then placed inside the housing 31. Next, depending on the test conditions, the environmental simulation mechanism 3 simulates salt spray and high-temperature salt spray conditions to create environments corresponding to different conditions for the spherical plain bearing 100. The salt spray nozzle 33 sprays salt spray before heating. The motion state of the spherical plain bearing 100 is obtained through the absolute encoder 25, torque sensor 24, and pressure sensor, thereby realizing a multi-condition spherical plain bearing 100 oscillation test.

[0071] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A test apparatus for oscillating wear of spherical bearings under high temperature and salt spray conditions, characterized in that, include: The fixing mechanism (1) includes a first bearing seat (11) for fixing a spherical bearing (100), and the first bearing seat (11) has a salt spray through hole along the radial direction of the spherical bearing (100). The power mechanism (2) includes a power component and a drive shaft (21). The power component is connected to the drive shaft (21) to drive the drive shaft (21) to rotate. The drive shaft (21) is used to extend into the inner ring of the spherical bearing (100) and drive the spherical bearing (100) to rotate. The environmental simulation mechanism (3) includes a housing (31), a salt spray assembly and a heating assembly. The salt spray assembly and the heating assembly are located inside the housing (31). The salt spray assembly is arranged toward the salt spray through hole to allow salt spray to enter the joint bearing (100). The heating assembly is used to increase the temperature inside the housing (31).

2. The test apparatus for spherical bearing oscillation wear under high temperature salt spray environment according to claim 1, characterized in that, The salt spray assembly includes a drive pump (32) and a salt spray nozzle (33). The inlet of the drive pump (32) is connected to a salt spray source, and the outlet of the drive pump (32) is connected to the salt spray nozzle (33) through a salt spray pipe (34). The salt spray nozzle (33) sprays out salt spray.

3. The test apparatus for spherical bearing oscillation wear under high temperature salt spray environment according to claim 1, characterized in that, The heating assembly includes a heating element (35) and a heating support platform (36). The heating support platform (36) is located in the area enclosed by the housing (31). The heating support platform (36) is disposed at the bottom of the fixing mechanism (1). The heating element (35) is fixed to the heating support platform (36) to provide heat to the heating support platform (36).

4. The test apparatus for spherical bearing oscillation wear under high temperature salt spray environment according to claim 1, characterized in that, The first bearing housing (11) is provided with a mounting hole for mounting the spherical bearing (100). The fixing mechanism (1) further includes a clamping member (12) and a friction member (13). The clamping member (12) and the friction member (13) are disposed in the mounting hole, and the clamping member (12) is fixedly connected to the first bearing housing (11). Along the axial direction of the mounting hole, the clamping member (12) and the friction member (13) are both located on both sides of the spherical bearing (100), and the friction member (13) is disposed between the clamping member (12) and the spherical bearing (100).

5. The test apparatus for spherical bearing oscillation wear under high temperature salt spray environment according to claim 1, characterized in that, The drive shaft (21) includes a first shaft (211), a second shaft (212), and an elastic mounting sleeve (213). The first shaft (211) and the second shaft (212) are respectively fixedly connected to two first flanges (214) of the elastic mounting sleeve (213). The first end of the second shaft (212) is connected to the power assembly. A second flange (215) is provided at one end of the first shaft (211) facing the elastic mounting sleeve (213) and at the second end of the second shaft (212). The first flange (214) is fixedly connected to the second flange (215). A tapered platform (216) is provided on one side of the second flange (215) facing the first flange (214). The elastic mounting sleeve (213) is provided with a tapered connecting hole along the axial direction. The tapered platform (216) is located in the tapered connecting hole. The volume of the tapered platform (216) is larger than the volume of the tapered connecting hole.

6. The test apparatus for spherical bearing oscillation wear under high temperature salt spray environment according to claim 5, characterized in that, The drive shaft (21) also includes a third shaft (217) and a torque limiter (218), the torque limiter (218) connecting the second shaft (212) and the third shaft (217), the third shaft (217) being connected to the power assembly.

7. The test apparatus for spherical bearing oscillation wear under high temperature salt spray environment according to claim 1, characterized in that, The high-temperature salt spray environment joint bearing swing wear test device also includes a loading mechanism (4). The loading mechanism (4) is located directly above the fixing mechanism (1). The loading mechanism (4) includes a support frame (41), a pressure sensor (46), a first driving member (42), and a loading member (43). The first driving member (42) is fixed to the top of the support frame (41). The pressure sensor (46) is disposed between the first driving member (42) and the loading member (43). The driving rod of the first driving member (42) passes through the support frame (41) and is fixedly connected to the loading member (43). The loading member (43) is located in the area enclosed by the support frame (41) and contacts the first bearing seat (11). The loading member (43) is located inside the housing (31).

8. The test apparatus for spherical bearing oscillation wear under high temperature salt spray environment according to claim 7, characterized in that, The loading mechanism (4) further includes a cooling structure (44) and a loading shaft (45). The first driving member (42) and the loading member (43) are connected through the loading shaft (45). The pressure sensor (46) is located between the first driving member (42) and the loading shaft (45). The cooling structure (44) is sleeved on the outer periphery of the loading shaft (45).

9. The test apparatus for spherical bearing oscillation wear under high temperature salt spray environment according to claim 1, characterized in that, The power assembly includes a motor (22) and a connecting coupling (23). The output shaft of the motor (22) is connected to the transmission shaft (21) through the connecting coupling (23). The power mechanism (2) also includes an absolute encoder (25) and a torque sensor (24). The torque sensor (24) is used to obtain the torque change value of the spherical bearing, and the absolute encoder (25) is used to obtain the swing angle of the spherical bearing.

10. The test apparatus for spherical bearing oscillation wear under high temperature salt spray environment according to claim 1, characterized in that, It also includes a heat dissipation mechanism, which includes a heat sink and a cooling fan (6). The heat sink is attached to the drive shaft (21), and the cooling fan (6) is located on one side of the drive shaft (21).

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