Gravity loading type water lubricated bearing tester

Abstract

The invention relates to a gravity loading type water lubricated bearing tester. The tester is provided with a bottom plate and an upper plate which are symmetrically arranged up and down; a plurality of optical shafts are fixedly arranged between the bottom plate and the upper plate, and a gravity platform is further arranged between the bottom plate and the upper plate and is arranged on the optical shafts in a sliding mode at the same time and can slide between the bottom plate and the upper plate; an upper bearing mounting seat is arranged between the gravity platform and the bottom plate, and a lower bearing mounting seat which can be inserted into or separated from the upper bearing mounting seat along with the sliding of the gravity platform is arranged on the bottom plate; a testing device is fixedly arranged at the upper end of the gravity platform, the testing device comprises a servo motor used for driving the upper bearing mounting seat to rotate and a torque sensor used for testing the torque of the servo motor, and a plurality of load grooves which are uniformly distributed are formed in the upper end of the gravity platform; according to the invention, the device can completely intrude underwater for testing and continuously apply the load, so that the continuous testing is kept.

Description

Technical Field

[0001] The invention patent relates to a gravity-loaded water-lubricated bearing tester. Background Art

[0002] A bearing detector is a specialized device used to monitor and diagnose the health of bearings in rotating machinery. Through vibration analysis, temperature measurement, and acoustic monitoring, the device can detect potential faults in advance, thereby avoiding unexpected downtime and increased maintenance costs. With the continuous advancement of sensor technology and data analysis algorithms, bearing detectors have significantly improved in accuracy and intelligence. Modern bearing detectors support wireless data transmission and remote monitoring, allowing users to understand the status of the equipment in real time and take preventive maintenance measures in a timely manner.

[0003] Traditional bearing testers have a horizontal structural design and the test environment simulation form is spraying. The test object (sliding bearing) cannot be completely submerged in water. The overall volume and mass are large, and it cannot be easily moved after positioning, which is inconvenient to operate. At the same time, although traditional bearing testers have a loading function, the loading power source is generally a hydraulic or pneumatic device and is unloaded through an elastic recovery device (i.e., temperature / friction limitation). The disadvantage is that it is impossible to give the test object a continuous and effective load while preventing load overload, resulting in interruptions in the load-carrying test process. Summary of the invention

[0004] The purpose of this patent is to provide a gravity-loaded water-lubricated bearing tester that can be fully immersed in water for testing and continuously apply load to keep the test going.

[0005] The technical solution to achieve the purpose of the patent of the present invention is: the patent of the present invention has a bottom plate and an upper plate which are symmetrically arranged up and down; a plurality of optical axes are fixedly arranged between the bottom plate and the upper plate, and a gravity platform is also provided, the gravity platform is slidably arranged on each optical axis at the same time and can slide between the bottom plate and the upper plate; an upper bearing mounting seat is provided between the gravity platform and the bottom plate, and a lower bearing mounting seat is provided on the bottom plate which can be plugged in or out of the upper bearing mounting seat as the gravity platform slides; a test device is fixedly provided on the upper end of the gravity platform, the test device includes a servo motor for driving the upper bearing mounting seat to rotate and a torque sensor for testing the torque of the servo motor, a plurality of evenly arranged load slots are provided on the upper end of the gravity platform, and a pressure sensor for feedback of load fluctuation values ​​is provided on the lower end of the gravity platform.

[0006] Furthermore, a mounting frame is fixedly provided on the gravity platform, the mounting frame is provided with an open end connected to the outside, and one side of the mounting frame provided with the open end is fixedly provided on the upper end of the gravity platform, the servo motor is fixedly provided on the outward side of the upper end of the mounting frame, and the torque sensor is fixedly provided inside the mounting frame, the driving end of the servo motor passes through the bottom of the mounting frame and is fixedly connected to the input end of the torque sensor through a first connecting piece, and a driving rod is also provided, one end of the driving rod is fixedly connected to the output end of the torque sensor through a second connecting piece, the middle part of the driving rod passes through the gravity platform and forms a rotational connection with the gravity platform through a bearing, and the other end of the driving rod is fixedly connected to the upper bearing mounting seat.

[0007] Furthermore, a plurality of penetrating mounting holes are provided on the side wall of the mounting frame, a connecting rod which can pass through the mounting hole is fixedly provided on the torque sensor, a fixing plate is fixedly provided on one end of the connecting rod which passes through the mounting hole, and the fixing plate can be fixed to the mounting frame by bolts. The torque sensor can be fixed inside the mounting frame after being fixed to the mounting frame by bolts through the fixing plate.

[0008] Furthermore, a thread is provided on one end of the drive rod fixedly connected to the upper bearing mounting seat, and a screw hole that can form a threaded match with the thread is provided on the upper bearing mounting seat. The upper bearing mounting seat is fixedly connected to the drive rod through the threaded match between the screw hole and the thread.

[0009] Furthermore, the first connecting member and the second connecting member each include a first half hoop and a second half hoop that can be connected to form a clamp, the first half hoop and the second half hoop are correspondingly provided with through holes, and are also equipped with a screw and a nut that can form a threaded fit, the first half hoop and the second half hoop are fixedly connected by the screw passing through the through hole and the threaded fit of the nut; the driving end of the servo motor is fixedly connected to the input end of the torque sensor through the fixed connection between the first half hoop and the second half hoop of the first connecting member, and one end of the driving rod is fixedly connected to the output end of the torque sensor through the fixed connection between the first half hoop and the second half hoop of the second connecting member.

[0010] Furthermore, a pressure block is fixedly provided on the pressure-bearing end of the pressure sensor, and the pressure-bearing end of the pressure sensor is arranged toward the base plate; a mounting column extending upward is fixedly provided on the base plate, and a dividing pin is fixedly provided on the top of the mounting column, which can form abutment with the pressure block after the upper bearing mounting seat and the lower bearing mounting seat are plugged in and fit, and a guiding groove is provided on the pressure block to guide the dividing pin to be embedded in and fit.

[0011] Furthermore, the upper bearing mounting seat includes a rotating shaft seat, a bearing inner ring fixing bracket and a bearing inner ring, the rotating shaft seat is fixedly set on the upper end of the bearing inner ring mounting seat, the bearing inner ring is fixedly set on the lower end of the bearing inner ring mounting seat, and the screw hole is set on the upper end of the rotating shaft seat; the lower bearing mounting seat includes a supporting bottom, a bearing outer ring fixing bracket and a bearing outer ring, a groove is provided on the bottom plate for placing the supporting bottom, the supporting bottom is fixedly set in the groove, the lower end of the bearing outer ring fixing bracket is fixedly set on the supporting bottom, and the bearing outer ring is fixedly set on the upper end of the bearing outer ring mounting seat.

[0012] Furthermore, the indexing pin includes a base block fixedly mounted on a mounting column and a roller rotatably mounted on the base block, a support plate is symmetrically mounted on the upper end of the base block, a connecting rod is fixedly mounted between the symmetrically mounted supporting rods, and a middle portion of the roller is rotatably mounted on the connecting rod.

[0013] Furthermore, a limit assembly for limiting the sliding of the gravity platform is provided on the optical axis, and the limit assembly is located between the base plate and the gravity platform. The limit assembly includes a limit ring and an adjusting threaded rod. The limit ring is sleeved on the optical axis, and a fracture is provided on the limit ring. The limit ring is divided into a first section and a second section by the fracture. An adjusting handle is fixedly provided on the adjusting threaded rod. A threaded hole that can form a threaded fit with the adjusting threaded rod is provided on the first section, and an adjusting hole for the adjusting threaded rod to pass through is penetrated on the second section. The limit ring is also provided with a limiting surface that can limit the adjusting handle after the adjusting threaded rod passes through the adjusting hole; the limit ring is adjustably fixed on the optical axis through the threaded fit between the adjusting threaded rod and the threaded hole and the limiting action of the limiting surface on the adjusting handle.

[0014] Furthermore, handles are symmetrically fixed on the upper end of the upper plate.

[0015] The patent of the present invention has positive effects: (1) The bottom plate and the upper plate of the present invention are symmetrically arranged up and down, and the test bearing can be placed in the lower bearing mounting seat on the bottom plate, and the lower bearing mounting seat can be completely immersed in water. The environment originally used for water moistening test by spraying can be converted to being placed underwater, which can meet the requirements of underwater bearing performance test; the test object placed on the bottom plate is pressurized by sliding the gravity platform, and at the same time, a counterweight can be added to the load slot on the gravity platform to ensure that the unloading function caused by the reaction force generated by the water flow during the test can be offset, and a continuous load can be provided to ensure uninterrupted testing.

[0016] (2) The torque sensor of the present invention is fixedly arranged inside the mounting frame, the driving end of the servo motor passes through the bottom of the mounting frame and is fixedly connected to the input end of the torque sensor through a first connecting member, one end of the driving rod is fixedly connected to the output end of the torque sensor through a second connecting member, the middle part of the driving rod passes through the gravity platform and is rotatably connected to the gravity platform through a bearing, and the other end of the driving rod is fixedly connected to the upper bearing mounting seat; the servo motor is adjusted to output large torque and precise speed through the torque sensor to ensure that the test object obtains a more accurate test output at various speeds. At the same time, if the torque increases due to bearing damage or other reasons, the motor stall protection can be triggered to interrupt the test.

[0017] (3) The side wall of the mounting frame of the present invention is provided with a plurality of through-going mounting holes, and may also be provided with a plurality of weight blocks that can be inserted into the mounting holes to further increase the load, and the weight blocks are provided with matching blocks that can be inserted into the mounting holes for hanging; by further adding the load, the stability of the test is further ensured.

[0018] (4) A thread is provided on one end of the driving rod of the present invention that is fixedly connected to the upper bearing mounting seat, and a screw hole that can form a threaded match with the thread is provided on the upper bearing mounting seat. The upper bearing mounting seat is fixedly connected to the driving rod through the threaded match between the screw hole and the thread. The upper bearing mounting seat can be disassembled, repaired or replaced through the threaded match, thereby extending its service life.

[0019] (5) The driving end of the servo motor of the present invention passes through the bottom of the mounting frame and is fixedly connected to the input end of the torque sensor through a first connecting member, and one end of the driving rod is fixedly connected to the output end of the torque sensor through a second connecting member. The first connecting member and the second connecting member both include a first half hoop and a second half hoop that can be correspondingly connected to form a clamp; the stability of the connection is ensured by the action of the first connecting member and the second connecting member.

[0020] (6) A pressure block is fixedly provided on the pressure-bearing end of the pressure sensor of the present invention, and the pressure-bearing end of the pressure sensor is arranged toward the base plate; an upwardly extending mounting column is fixedly provided on the base plate, and a dividing pin is fixedly provided on the top of the mounting column, which can form abutment with the pressure block after being plugged into the upper bearing mounting seat and the lower bearing mounting seat, and a guiding groove is provided on the pressure block to guide the dividing pin to be embedded to form a fit; the dividing pin is in a semi-tightened state during the test, and the load fluctuation generated during the test operation will be reflected in the form of changes in the size of the rebound force given to the sensor by the dividing pin during this process, and the load fluctuation value during the test process can be fed back in real time, providing real and effective parameters for calibration for the later test data collation, thereby ensuring accurate data detection.

[0021] (7) The optical axis of the present invention is provided with a limit assembly for limiting the sliding of the gravity platform. The limit assembly is located between the base plate and the gravity platform. The limit assembly includes a limit ring and an adjusting threaded rod. The limit ring is sleeved on the optical axis. The limit assembly limits the gravity platform so that the gravity platform is fixed on the optical axis when it is being transported, replacing the test bearing tooling, or not in use, thereby preventing the gravity platform from driving the upper bearing mounting seat to move downward during this process, which makes it inconvenient to transport or replace the test bearing tooling, thereby increasing safety.

[0022] (8) The upper end of the upper plate of the present invention is symmetrically fixed with a handle, which makes it easy for the tester to carry the entire invention to the test scene or take it out of the toilet scene, making the present invention easier to carry, more convenient and efficient.

[0023] (9) The entire invention can be made of aluminum alloy or stainless steel to reduce the weight of the entire invention and make it easier to carry and move. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in combination with the accompanying drawings, wherein

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a front view of the present invention;

[0027] Figure 3 is a side view of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the lower bearing mounting seat and the upper bearing mounting seat of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the limiting component of the invention;

[0030] Figure 6 It is a schematic structural diagram of the first connecting member or the second connecting member of the present invention;

[0031] Figure 7 for Figure 3 A partial enlarged view of center. DETAILED DESCRIPTION

[0032] See Figures 1 to 7The patent of the present invention has a bottom plate 1 and an upper plate 2 which are symmetrically arranged up and down; a plurality of optical axes 3 are fixedly arranged between the bottom plate 1 and the upper plate 2, and a gravity platform 4 is also provided, the gravity platform 4 is slidably arranged on each optical axis 3 at the same time and can slide between the bottom plate 1 and the upper plate 2; an upper bearing mounting seat 6 is provided between the gravity platform 4 and the bottom plate 1, and a lower bearing mounting seat 7 is provided on the bottom plate 1 which can be plugged into or disengaged from the upper bearing mounting seat 6 as the gravity platform 4 slides; a testing device 5 is fixedly provided at the upper end of the gravity platform 4, the testing device 5 includes a servo motor 51 for driving the upper bearing mounting seat 6 to rotate and a torque sensor 52 for testing the torque of the servo motor 51, a plurality of evenly arranged load slots 41 are provided on the upper end of the gravity platform 4, and a pressure sensor 42 for feedback of load fluctuation values ​​is provided on the lower end of the gravity platform 4.

[0033] A plurality of load counterweights may be placed in the load slot 41 , and may be used to apply a certain load to the test object during the test, thereby ensuring that the test process is continuous and uninterrupted.

[0034] A mounting frame 53 is also fixedly provided on the gravity platform 4. The mounting frame 53 is provided with an open end connected to the outside. One side of the mounting frame 53 with the open end is fixedly provided on the upper end of the gravity platform 4. The servo motor 51 is fixedly provided on the outward side of the upper end of the mounting frame 53. The torque sensor 53 is fixedly provided inside the mounting frame 53. The driving end of the servo motor 51 passes through the bottom of the mounting frame 53 and is fixedly connected to the input end of the torque sensor 53 through a first connecting member 51-1. A driving rod 54 is also provided. One end of the driving rod 54 is fixedly connected to the output end of the torque sensor 53 through a second connecting member 52-1. The middle part of the driving rod 54 passes through the gravity platform 4 and is rotatably connected to the gravity platform 4 through a bearing. The other end of the driving rod 54 is fixedly connected to the upper bearing mounting seat 6.

[0035] The optical axes 3 are provided with four and are distributed in a rectangular shape. The servo motor 51 , the torque sensor 52 , the mounting seat 53 , the driving rod 53 , the upper bearing mounting seat 6 and the lower bearing mounting seat 7 are all located in the middle of the four optical axes 3 distributed in a rectangular shape.

[0036] The gravity platform 4 can slide toward the bottom plate 1 under the action of gravity.

[0037] The servo motor 51 is adjusted to output high torque and precise rotation speed through the torque sensor 53 to ensure that the test object obtains relatively accurate test output at various rotation speeds. At the same time, if the torque increases due to bearing damage or other reasons, the motor stall protection can be triggered to interrupt the test.

[0038] The side wall of the mounting frame 53 is provided with a plurality of mounting holes 531 which penetrate therethrough. A connecting rod 521 which can pass through the mounting hole 531 is fixedly provided on the torque sensor 53. A fixing plate 522 is fixedly provided on one end of the connecting rod 521 which passes through the mounting hole 531. The fixing plate 522 can be fixed to the mounting frame 53 by bolts. The torque sensor 53 can be fixed inside the mounting frame 53 after being fixed to the mounting frame 53 by bolts via the fixing plate 522.

[0039] A plurality of weight blocks that can be inserted into the mounting hole 531 to further increase the load can also be provided, and a matching block that can be inserted into the mounting hole 531 for suspension is provided on the weight block, so that the pressure on the test bearing can be further increased by using the weight blocks.

[0040] A thread is provided on one end of the driving rod 54 fixedly connected to the upper bearing mounting seat 6. The upper bearing mounting seat 6 is provided with a screw hole 61 which can form a threaded fit with the thread. The upper bearing mounting seat 6 is fixedly connected to the driving rod 54 through the threaded fit of the screw hole 61 and the thread.

[0041] The first connecting member 51-1 and the second connecting member 52-1 both include a first half hoop 8 and a second half hoop 9 which can be connected to form a clamp, and the first half hoop 8 and the second half hoop 9 are correspondingly provided with through holes, and are also equipped with a screw and a nut which can form a threaded fit. The first half hoop 8 and the second half hoop 9 are fixedly connected by the screw passing through the through hole and the threaded fit with the nut; the driving end of the servo motor 51 is fixedly connected to the input end of the torque sensor 53 through the fixed connection between the first half hoop 8 and the second half hoop 9 of the first connecting member 51-1, and one end of the driving rod 54 is fixedly connected to the output end of the torque sensor 53 through the fixed connection between the first half hoop 8 and the second half hoop 9 of the second connecting member 52-1.

[0042] A pressure block 421 is fixedly provided on the pressure-bearing end of the pressure sensor 42, and the pressure-bearing end of the pressure sensor 42 is arranged toward the base plate 1; an upwardly extending mounting column 11 is fixedly provided on the base plate 1, and a dividing pin 111 is fixedly provided on the top of the mounting column 11, which can form abutment with the pressure block 421 after the upper bearing mounting seat 6 and the lower bearing mounting seat 7 are plugged in and fit, and a guide groove 4211 is provided on the pressure block 421 to guide the dividing pin 111 to be embedded in the fit.

[0043] The upper bearing mounting seat 6 includes a rotating shaft seat 61, a bearing inner ring 63 fixing bracket 62 and a bearing inner ring 63, wherein the rotating shaft seat 61 is fixedly arranged at the upper end of the bearing inner ring 63 mounting seat, the bearing inner ring 63 is fixedly arranged at the lower end of the bearing inner ring 63 mounting seat, and the screw hole 61 is arranged at the upper end of the rotating shaft seat 61; the lower bearing mounting seat 7 includes a supporting bottom 71, a bearing outer ring 73 fixing bracket 72 and a bearing outer ring 73, a groove 4211 for placing the supporting bottom 71 is provided on the bottom plate 1, the supporting bottom 71 is fixedly arranged in the groove 4211, the lower end of the bearing outer ring 73 fixing bracket 72 is fixedly arranged on the supporting bottom 71, and the bearing outer ring 73 is fixedly arranged at the upper end of the bearing outer ring 73 mounting seat.

[0044] The bottom of the groove 4211 may be provided with a plurality of holes, and the bottom of the support base 71 may be provided with a plurality of insertion rods which may be inserted into the holes one by one. The support base 71 is fixed in the groove 4211 by inserting the insertion rods into the holes.

[0045] When the test bearing is installed on the upper bearing mounting seat 6 and the lower bearing mounting seat 7, the bearing inner ring 63 acts on the inner ring of the bearing, and the bearing outer ring 73 acts on the outer ring of the bearing. When the upper bearing mounting seat 6 rotates, the bearing inner ring 63 drives the bearing inner ring to rotate, thereby performing a test.

[0046] The indexing pin 111 includes a bottom block 1111 fixedly mounted on the mounting column 11 and a roller 1112 rotatably mounted on the bottom block 1111. Support plates are symmetrically mounted on the upper end of the bottom block 1111. Connecting rods are fixedly mounted between the symmetrically mounted supporting rods. The middle portion of the roller 1112 is rotatably mounted on the connecting rods.

[0047] The indexing pin 111 is in a semi-tightened state during the test. The load fluctuations generated during the test will be reflected in the form of changes in the rebound force given to the sensor by the indexing pin 111. The load fluctuation value during the test can be fed back in real time, providing real and effective parameters for calibration for the subsequent test data collation.

[0048] The optical axis 3 is provided with a limit assembly 10 for limiting the sliding of the gravity platform 4. The limit assembly 10 is located between the base plate 1 and the gravity platform 4. The limit assembly 10 includes a limit ring 101 and an adjusting threaded rod 102. The limit ring 101 is sleeved on the optical axis 3. The limit ring 101 is provided with a fracture. The limit ring 101 is divided into a first section 1021 and a second section 1022 by the fracture. An adjusting handle 1023 is fixed on the adjusting threaded rod 102. A threaded hole is provided which can form a threaded match with the adjusting threaded rod 102, an adjusting hole is penetrated on the second section 1022 for the adjusting threaded rod 102 to pass through, and a limiting surface 103 is also provided on the limiting ring 101 which can limit the adjusting handle 1023 after the adjusting threaded rod 102 passes through the adjusting hole; the limiting ring 101 is adjustably fixed on the optical axis 3 through the threaded match between the adjusting threaded rod 102 and the threaded hole and the limiting effect of the limiting surface 103 on the adjusting handle 1023.

[0049] Through the limiting effect of the limiting component 10 on the gravity platform 4, the gravity platform 4 is fixed on the optical axis 3 when being transported, replacing the test bearing tooling or not in use, avoiding the gravity platform 4 driving the upper bearing mounting seat 6 to move downward during this process, which makes it inconvenient to transport or replace the test bearing tooling, thereby increasing safety.

[0050] A handle 21 is symmetrically fixed to the upper end of the upper plate 2 .

[0051] The whole device can be made of aluminum alloy or stainless steel to reduce the weight of the whole device and make it easier to carry and move.

[0052] The working principle of the present invention is as follows: the entire invention is moved to the test scene by the handle 21, the bearing to be tested is placed on the lower bearing mounting seat 7, the adjustment handle 1023 in the limit assembly 10 is rotated, the adjustment threaded rod 102 is screwed out from the threaded hole, the restriction on the gravity platform 4 is cancelled, and the gravity platform 4 drives the upper bearing mounting seat 6 to move downward until the upper bearing mounting seat 6 is plugged into the lower bearing mounting seat 7, and the bearing is clamped between the upper bearing mounting seat 6 and the lower bearing mounting seat 7. At this time, the indexing pin 111 is in contact with the pressing block 421, and the servo motor 51 is started to drive the torque sensor 53 and the servo motor 54. The fixedly connected upper bearing mounting seat 6 rotates, and the rotating lower bearing mounting seat 7 drives the tested bearing to rotate. The force change during the test affects the clamping state of the indexing pin 111, and the magnitude of the rebound force is reflected on the corresponding pressure sensor 42, thereby feeding back the change in the thrust value loaded on the tested bearing in real time; during the test, weight blocks can be added to the load slot 41 and the mounting hole 531 to further increase the load, thereby further ensuring the stable progress of the test, and at the same time offsetting the unloading function caused by the reaction force generated by the water flow during the test, and also providing a continuous load to ensure uninterrupted testing.

[0053] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gravity-loaded water-lubricated bearing tester, comprising a bottom plate (1) and an upper plate (2) symmetrically arranged up and down; characterized in that: A plurality of optical axes (3) are fixedly arranged between the bottom plate (1) and the upper plate (2), and a gravity platform (4) is also arranged. The gravity platform (4) is slidably arranged on each of the optical axes (3) and can slide between the bottom plate (1) and the upper plate (2); an upper bearing mounting seat (6) is arranged between the gravity platform (4) and the bottom plate (1), and a lower bearing mounting seat (7) is arranged on the bottom plate (1) and can be plugged into or disengaged from the upper bearing mounting seat (6) as the gravity platform (4) slides; a testing device (5) is fixedly arranged at the upper end of the gravity platform (4), and the testing device (5) comprises a servo motor (51) for driving the upper bearing mounting seat (6) to rotate and a torque sensor (52) for testing the torque of the servo motor (51); a plurality of evenly arranged load slots (41) are arranged on the upper end of the gravity platform (4), and a pressure sensor (42) for feeding back load fluctuation values ​​is arranged on the lower end of the gravity platform (4).

2. A gravity-loaded water-lubricated bearing tester according to claim 1, characterized in that: A mounting frame (53) is also fixedly provided on the gravity platform (4), the mounting frame (53) is provided with an open end communicating with the outside, a side of the mounting frame (53) provided with the open end is fixedly provided on the upper end of the gravity platform (4), the servo motor (51) is fixedly provided on the side of the upper end of the mounting frame (53) facing outward, the torque sensor (53) is fixedly provided inside the mounting frame (53), the driving end of the servo motor (51) passes through the bottom of the mounting frame (53) and is fixedly connected to the input end of the torque sensor (53) through a first connecting member (51-1), a driving rod (54) is also provided, one end of the driving rod (54) is fixedly connected to the output end of the torque sensor (53) through a second connecting member (52-1), the middle part of the driving rod (54) passes through the gravity platform (4) and is rotatably connected to the gravity platform (4) through a bearing, and the other end of the driving rod (54) is fixedly connected to the upper bearing mounting seat (6).

3. The gravity-loaded water-lubricated bearing tester according to claim 2, characterized in that: The side wall of the mounting frame (53) is provided with a plurality of mounting holes (531) extending therethrough. A connecting rod (521) that can pass through the mounting hole (531) is fixedly provided on the torque sensor (53). A fixing plate (522) is fixedly provided on one end of the connecting rod (521) that passes through the mounting hole (531). The fixing plate (522) can be fixed to the mounting frame (53) by bolts. The torque sensor (53) can be fixedly provided inside the mounting frame (53) after being fixed to the mounting frame (53) by bolts via the fixing plate (522).

4. The gravity-loaded water-lubricated bearing tester according to claim 2, characterized in that: A thread is provided on one end of the driving rod (54) fixedly connected to the upper bearing mounting seat (6); a screw hole (61) capable of threading with the thread is provided on the upper bearing mounting seat (6); the upper bearing mounting seat (6) is fixedly connected to the driving rod (54) through the threading cooperation between the screw hole (61) and the thread.

5. The gravity-loaded water-lubricated bearing tester according to claim 2, characterized in that: The first connecting member (51-1) and the second connecting member (52-1) both comprise a first half hoop (8) and a second half hoop (9) which can be connected to form a clamp, and the first half hoop (8) and the second half hoop (9) are provided with through holes, and are also provided with screws and nuts which can form threaded fit, and the first half hoop (8) and the second half hoop (9) are fixedly connected by the screw passing through the through holes and the screw fitting with the nut; the driving end of the servo motor (51) is fixedly connected to the input end of the torque sensor (53) through the fixed connection between the first half hoop (8) and the second half hoop (9) of the first connecting member (51-1), and one end of the driving rod (54) is fixedly connected to the output end of the torque sensor (53) through the fixed connection between the first half hoop (8) and the second half hoop (9) of the second connecting member (52-1).

6. The gravity-loaded water-lubricated bearing tester according to claim 1, characterized in that: A pressure block (421) is fixedly provided on the pressure-bearing end of the pressure sensor (42), and the pressure-bearing end of the pressure sensor (42) is arranged toward the base plate (1); an upwardly extending mounting column (11) is fixedly provided on the base plate (1), and a dividing pin (111) is fixedly provided on the top end of the mounting column (11) and can form abutment with the pressure block (421) after the upper bearing mounting seat (6) and the lower bearing mounting seat (7) are plugged in and matched, and a guide groove (4211) is provided on the pressure block (421) for guiding the dividing pin (111) to be inserted and matched.

7. The gravity-loaded water-lubricated bearing tester according to claim 4, characterized in that: The upper bearing mounting seat (6) comprises a rotating shaft seat (61), a bearing inner ring (63) fixing bracket (62) and a bearing inner ring (63); the rotating shaft seat (61) is fixedly arranged at the upper end of the bearing inner ring (63) mounting seat, the bearing inner ring (63) is fixedly arranged at the lower end of the bearing inner ring (63) mounting seat, and the screw hole (61) is arranged at the upper end of the rotating shaft seat (61); the lower bearing mounting seat (7) comprises a supporting base (71), a bearing outer ring (73) fixing bracket (72) and a bearing outer ring (73); a groove (4211) for placing the supporting base (71) is provided on the bottom plate (1), the supporting base (71) is fixedly arranged in the groove (4211), the lower end of the bearing outer ring (73) fixing bracket (72) is fixedly arranged on the supporting base (71), and the bearing outer ring (73) is fixedly arranged at the upper end of the bearing outer ring (73) mounting seat.

8. The gravity-loaded water-lubricated bearing tester according to claim 6, characterized in that: The indexing pin (111) comprises a bottom block (1111) fixedly arranged on the mounting column (11) and a roller (1112) rotatably arranged on the bottom block (1111); a support plate is symmetrically arranged at the upper end of the bottom block (1111); a connecting rod is fixedly arranged between the symmetrically arranged supporting rods; and the middle part of the roller (1112) is rotatably arranged on the connecting rod.

9. The gravity-loaded water-lubricated bearing tester according to claim 1, characterized in that: The optical axis (3) is provided with a limit assembly (10) for limiting the sliding of the gravity platform (4); the limit assembly (10) is located between the bottom plate (1) and the gravity platform (4); the limit assembly (10) comprises a limit ring (101) and an adjusting threaded rod (102); the limit ring (101) is sleeved on the optical axis (3); a fracture is provided on the limit ring (101); the limit ring (101) is divided into a first section (1021) and a second section (1022) by the fracture; an adjusting handle (1023) is fixedly provided on the adjusting threaded rod (102); the first section (1021) and the second section (1022) are respectively provided with a limit assembly (1021) and a second section (1022) and a first section (1021) and a second section (1022) are respectively provided on the limit ring (101) and the adjusting threaded rod (102) are respectively provided with a limit assembly (1021) and a second section (1022) are respectively provided on the limit ring (101) and the adjusting threaded rod (102) are respectively provided with a limit assembly (1021) and a second section (1022) are respectively provided on the limit ring (101) and the adjusting threaded rod (102) are respectively provided with a limit assembly (1021) and a second section (1022) are respectively provided on the limit ring (101) and the first section (1021) and the second section (102 ... A threaded hole (1021) is provided on the optical section (1021) and can be threadedly matched with the adjusting threaded rod (102); an adjusting hole is penetrated on the second section (1022) for the adjusting threaded rod (102) to pass through; and a limiting surface (103) is also provided on the limiting ring (101) and can limit the adjusting handle (1023) after the adjusting threaded rod (102) passes through the adjusting hole; the limiting ring (101) is adjustably fixed on the optical axis (3) through the threaded match between the adjusting threaded rod (102) and the threaded hole and the limiting effect of the limiting surface (103) on the adjusting handle (1023).

10. The gravity-loaded water-lubricated bearing tester according to claim 1, characterized in that: A handle (21) is symmetrically fixedly provided on the upper end of the upper plate (2).

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