Marine bearing swing test device

Abstract

The present invention relates to a marine bearing swing test device. The test device comprises a swing tilt test device, which comprises a test bench, and the marine bearing swing test device also comprises a space loading upright bearing test bench located on the test bench, the space loading upright bearing test bench comprises a driving motor, a transmission shaft, a unloading mechanism, a test shaft, a flexible loading device and a bearing support, one end of the transmission shaft is transmission-connected to the driving motor, and the other end is transmission-connected to the test bearing, the unloading mechanism is used to unload the deflection and vibration of the transmission shaft; the test shaft is equipped with a sliding bearing; the flexible loading device comprises a suspension assembly and a plurality of lifting mechanisms arranged at intervals along the outer peripheral side of the suspension assembly, a slot structure for assembling the sliding bearing and the test shaft is arranged in the suspension assembly, and the lifting mechanism comprises a flexible member, a first telescopic cylinder and a second telescopic cylinder. The present invention realizes the flexible change of the direction of applied load and ensures the accuracy of the test results.

Description

Technical Field

[0001] The invention relates to the technical field of ships, in particular to a ship bearing swing test device. Background Art

[0002] Sliding bearings are often used in some large equipment because they can achieve high-speed operation with large loads, long life and high reliability, such as large marine motor sliding bearings, large steam turbine main shaft bearings, nuclear main pump bearings, etc. With the development of the national economy, the demand for such bearings is becoming more and more extensive. These bearings have common characteristics: large load, high speed, high reliability requirements, and are high-end sliding bearings. When developing such bearings, full-condition performance tests must be carried out, and for this purpose, a full-condition performance test bench must be developed, and the full-condition performance test bench must meet the requirements of large loads and high speeds.

[0003] However, the existing marine bearing testing equipment can only apply load in a single direction. During the actual operation of the ship, as the hull shakes, the bearings will be subjected to forces in all directions, and the existing marine bearing testing equipment cannot meet the detection requirements of applying loads to bearings in multiple directions. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a marine bearing swing test device to solve the technical problems in the prior art that the load direction of the space loading upright bearing test bench is single and the direction of the load cannot be flexibly adjusted.

[0005] The technical solution of a marine bearing swing test device of the present invention is:

[0006] A marine bearing swing test device, comprising a swing and tilt test device, the swing and tilt test device comprising a test bench, the marine bearing swing test device also comprising a space-loaded upright bearing test bench located on the test bench, the space-loaded upright bearing test bench comprising a drive motor, a transmission shaft, a unloading mechanism, a test shaft, a flexible loading device and a bearing support, one end of the transmission shaft is transmission-connected to the drive motor, and the other end is transmission-connected to the test bearing, the unloading mechanism is used to unload the deflection and vibration of the transmission shaft; the test shaft is used to fit a sliding bearing; the flexible loading device comprises a suspension assembly and a plurality of lifting mechanisms spaced apart along the outer circumference of the suspension assembly, the suspension assembly is provided with a slot structure for assembling sliding bearings and test shafts, the lifting mechanism comprises a flexible member, a first A telescopic cylinder and a second telescopic cylinder, one end of the flexible member is connected to the driving end of the first telescopic cylinder, and the other end is used to connect to the suspension assembly, the driving end of the second telescopic cylinder faces upward and is supported in the middle of the flexible member; there are two bearing supports, which are respectively located at the two ends of the test shaft and are rotatably assembled with the test shaft, an intermediate partition is arranged in the bearing support, the intermediate partition divides the inner cavity of the bearing support into two oil storage cavities, a through hole connecting the two oil storage cavities is arranged on the intermediate partition, a mounting hole for assembling a support bearing is also arranged on the intermediate partition, the outer ring of the support bearing is anti-rotatingly assembled with the intermediate partition, an oil inlet and an oil outlet connected with the inner cavity of the bearing support are arranged on the bearing support, and a shaft vibration sensor for monitoring the vibration of the test shaft is also installed in the bearing support.

[0007] As a further improvement of the above technical solution, the bearing support close to one side of the transmission shaft is set as the right bearing support, and the other is set as the left bearing support. The test shaft passes through the left and right sides of the right bearing support, and the left end of the test shaft is located in the left bearing support. The left and right sides of the right bearing support and the right side of the left bearing support are provided with oil scraper end covers for the test shaft to pass through, and an oil collection structure for preventing leakage of lubricating oil is provided between each oil scraper end cover and the test shaft.

[0008] As a further improvement of the above technical solution, the oil collection structure includes an oil-slinging ring groove arranged on the outer peripheral side of the test shaft and a circumferential oil groove arranged on the oil scraper end cover. The notch of the circumferential oil groove is arranged opposite to the notch of the oil-slinging ring groove. The oil-slinging ring groove is used to throw the overflowed lubricating oil into the circumferential oil groove when the test shaft rotates. The oil scraper end cover is also provided with an oil return hole connecting the circumferential oil groove and the oil storage chamber.

[0009] As a further improvement to the above technical solution, a V-shaped ring groove is further provided on the oil scraper end cover, the notch direction of the V-shaped ring groove is the same as the notch direction of the circumferential oil groove, and V-shaped ring grooves are provided on both sides of the circumferential oil groove.

[0010] As a further improvement to the above technical solution, a thrust end cover is sealed and installed on the left bearing support, and the thrust end cover is arranged opposite to the oil scraping end cover on the left bearing support.

[0011] As a further improvement to the above technical solution, an anti-rotation rod is installed on the bearing support, and an anti-rotation hole for inserting the end of the anti-rotation rod is provided on the outer ring of the support bearing.

[0012] As a further improvement to the above technical solution, a U-shaped frame is fixed in the oil storage cavity, the test shaft passes through the U-shaped frame, and the shaft vibration sensor is installed on the U-shaped frame.

[0013] As a further improvement to the above technical solution, the setting position of the oil inlet is higher than the setting position of the oil outlet.

[0014] As a further improvement of the above technical solution, the main shaft of the drive motor is connected to the transmission shaft through a synchronous belt, a motor base is provided at the bottom of the drive motor, the drive motor guide is slidably assembled on the motor base, an adjustment block is provided on the motor base, there are at least two adjustment blocks and they are divided into two rows, the drive motor is installed between the two rows of adjustment blocks, each adjustment block is threadedly assembled with an adjustment bolt, and the drive motor is clamped and fixed between the two rows of adjustment bolts.

[0015] As a further improvement of the above technical solution, the swing and tilt test device includes a base plate, on which a base with a rotation axis extending in the up and down directions is rotatably mounted, and a first driving mechanism for driving the base to rotate is provided on the base. The test device also includes a test bench located on the upper side of the base, and the four corners of the test bench are respectively connected to the base through a servo telescopic cylinder, the upper end of the servo telescopic cylinder is connected to the test bench ball joint, and the lower end of the servo telescopic cylinder is connected to the base through a universal joint. The test device also includes an auxiliary support for constraining the test bench, the lower end of the auxiliary support is fixedly connected to the base, and the upper end is connected to the test bench. The test bench includes a frame and a swing platform rotatably assembled in the frame, the rotation axis of the swing platform extends in the front and rear directions, and the frame is provided with a second driving mechanism for driving the swing platform to rotate and a braking mechanism for braking the swing platform.

[0016] The present invention provides a marine bearing swing test device, which has the following beneficial effects compared with the prior art:

[0017] The marine bearing sway test device of the present invention can realize roll, pitch, bow and tilt, and can simulate various usage scenarios of marine bearings more realistically, providing a basis for the design and manufacture of marine bearings. During the test, the adjustment of the traction force of each flexible part can be achieved by adjusting the telescopic amount of the first telescopic cylinder and the second telescopic cylinder, and the resultant force formed by the traction force of each flexible part will also be adjusted accordingly, thereby realizing the flexible change of the direction of applied load and facilitating the detection of sliding bearings. In addition, in the present invention, by providing an unloading mechanism and a transmission shaft, the deflection and vibration caused by the driving mechanism can be weakened and will not be directly transmitted to the test shaft, thus ensuring the accuracy of the test results. In the present invention, an oil inlet, an oil outlet, an oil storage chamber, etc. are provided on the bearing support, so that the support bearing and the test shaft can be lubricated by a circulating oil circuit, thereby improving the lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the swing and tilt test device in the marine bearing swing test device of the present invention is schematically shown. Figure 1 ;

[0019] Figure 2 The structure of the swing and tilt test device in the marine bearing swing test device of the present invention is schematically shown. Figure 2 ;

[0020] Figure 3 It is a structural schematic diagram of a test bench in a swing and tilt test device in a marine bearing swing test device of the present invention;

[0021] Figure 4 It is a structural schematic diagram of a servo hydraulic cylinder in a swing and tilt test device in a marine bearing swing test device of the present invention;

[0022] Figure 5 It is a structural schematic diagram of a Hooke's hinge in a swing and tilt test device in a marine bearing swing test device of the present invention;

[0023] Figure 6 It is a schematic diagram of the assembly of the base and the bottom plate in the swing and tilt test device in the marine bearing swing test device of the present invention;

[0024] Figure 7 yes Figure 6 A cross-sectional view of the base and the bottom plate in FIG.

[0025] Figure 8 It is a structural schematic diagram of a bottom plate in a swing and tilt test device in a marine bearing swing test device of the present invention;

[0026] Fig. 9 It is a structural schematic diagram of a base in a swing and tilt test device in a marine bearing swing test device of the present invention;

[0027] Fig.10 It is a structural schematic diagram of a driving mechanism in a swing and tilt test device in a marine bearing swing test device of the present invention;

[0028] Fig.11 yes Fig.10 The structural diagram of the motor and reducer in FIG.

[0029] Fig.12 yes Fig.10 A schematic diagram of the structure of the rotating shaft in FIG.

[0030] Fig.13 yes Fig.10 Schematic diagram of the assembly of the connecting sleeve, the plane bearing and the connecting ring;

[0031] Fig.14 yes Fig.10 A schematic diagram of the structure of the connecting sleeve in FIG.

[0032] Fig.15 yes Fig.10 A schematic diagram of the structure of the connecting ring in FIG.

[0033] Fig.16 The structure of the test bench in the swing and tilt test device of the marine bearing swing test device of the present invention is shown in FIG. Figure 1 ;

[0034] Fig.17 The structure of the test bench in the swing and tilt test device of the marine bearing swing test device of the present invention is shown in FIG. Figure 2 ;

[0035] Fig.18 The structure of the test bench in the swing and tilt test device of the marine bearing swing test device of the present invention is shown in FIG. Figure 3 ;

[0036] Fig.19 It is a structural schematic diagram of an auxiliary support in a swing and tilt test device in a marine bearing swing test device of the present invention;

[0037] Fig. 20 It is a structural schematic diagram of a gantry bracket and a flexible traction mechanism in a swing and tilt test device in a marine bearing swing test device of the present invention;

[0038] Fig.21 It is a structural schematic diagram of a flexible traction mechanism in a swing and tilt test device in a marine bearing swing test device of the present invention;

[0039] Fig. 22 It is a schematic diagram of the overall structure of a space-loaded upright bearing test bench in a marine bearing swing test device of the present invention;

[0040] Fig.23 yes Fig. 22 A partial enlarged view of the middle A;

[0041] Fig.24 It is a top view of the overall structure of the space loading upright bearing test bench in the marine bearing swing test device of the present invention;

[0042] Fig.25 yes Fig.24 Schematic diagram of the cross section at the middle BB;

[0043] Fig.26 yes Fig.25 An enlarged schematic diagram of the internal structure of the middle bearing support;

[0044] Fig. 27 yes Fig.25 The enlarged schematic diagram at C in the middle;

[0045] Fig.28 It is a partial structural stereoscopic diagram of a space-loaded upright bearing test bench in a marine bearing swing test device of the present invention;

[0046] Fig.29 It is a three-dimensional schematic diagram of a flexible loading device of a space-loading upright bearing test bench in a marine bearing swing test device of the present invention;

[0047] Fig.30 It is a three-dimensional schematic diagram of the lifting mechanism of the space-loading upright bearing test bench in the marine bearing sway test device of the present invention;

[0048] Fig.31 It is a three-dimensional schematic diagram of the suspension assembly of the space-loading upright bearing test bench in the marine bearing swing test device of the present invention;

[0049] Fig.32 It is a cross-sectional schematic diagram of the suspension assembly of the space-loaded upright bearing test bench in the marine bearing swing test device of the present invention;

[0050] Fig.33 It is a structural schematic diagram of a marine bearing swing test device of the present invention;

[0051] In the figure: 1, bottom plate; 2, base; 3, air spring; 4, benchmark; 5, motor; 6, worm gear reducer; 61, socket; 7, reducer fixing seat; 8, rotating shaft; 81, small diameter section; 82, large diameter section; 83, connecting flange; 84, connecting key; 9, fixing plate; 10, connecting sleeve; 101 horizontal part; 102, vertical part; 11, plane thrust ball bearing; 12, connecting ring; 121, flange; 13, mounting plate; 14, step hole; 15, fixing block; 16, test bench; 161, fixing hole; 17, servo hydraulic cylinder; 18, second Hook hinge; 181, second Lower hinge seat; 182, second connecting rod; 183, second upper hinge body; 19, cushion block; 20, support plate; 21, ball head seat; 22, fixing hole; 23, avoidance groove; 24, perforation; 25, gantry bracket; 251, bracket column; 252-through hole; 253-bracket crossbeam; 26, flexible traction mechanism; 261-lateral traction mechanism; 262-longitudinal traction mechanism; 263-roller structure; 264-sliding roller; 265-limiting cover; 266-length adjustment structure; 267-rotation assembly structure; 27, swing platform; 28, connecting seat; 29, pin shaft; 30, Motor; 31. Brake; 32. Brake disc; 33. First bearing group; 34. Second bearing group; 35. Support frame; 36. Telescopic rod; 37. First lower hinge seat; 38. First connecting rod; 39. First upper hinge body; 40. Driving motor; 41. Synchronous belt; 42. Unloading mechanism; 43. Right bearing support; 44. Left bearing support; 45. Flexible loading device; 46. Adjustment block; 47. Adjustment bolt; 48. Fixing bolt; 49. Test shaft; 50. Suspension assembly; 51. Transmission shaft; 52. Motor base; 53. Thrust end cover; 54. Middle partition; 55. Through hole ; 56. U-shaped frame; 57. Oil storage chamber; 58. Anti-rotation rod; 59. Support bearing; 60. Oil-throwing ring groove; 61. Circumferential oil groove; 62. V-shaped ring groove; 63. Oil return hole; 64. Oil outlet; 65. Oil inlet; 66. Lifting mechanism; 67. Lifting base; 68. Second telescopic cylinder; 69. First telescopic cylinder; 70. Buffer; 71. Tension sensor; 72. Flexible member; 73. First pulley assembly; 74. Second pulley assembly; 75. Guide plate; 76. Suspension chassis; 77. Slot structure; 78. Shell; 79. Support platform; 80. Lining; 81. Sliding bearing. DETAILED DESCRIPTION

[0052] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0053] A specific embodiment of the marine bearing swing test device of the present invention comprises a swing and tilt test device and a space-loaded upright bearing test bench.

[0054] like Figure 1 , Figure 2 As shown, the sway and tilt test device includes a base plate 1, a base 2, a first driving mechanism and a test bench 16. The base 2 is rotatably mounted on the base plate 1, and the rotation axis of the base 2 extends in the up-down direction. The first driving mechanism is used to drive the base 2 to rotate relative to the base plate 1. Two parallel and spaced fixed blocks 15 are fixedly connected to the base 2, and the two ends of the fixed block 15 are respectively fixedly connected with a servo telescopic cylinder extending upward. Preferably, the servo telescopic cylinder is a servo hydraulic cylinder 17. The upper end of the servo hydraulic cylinder 17 is connected to the test bench 16.

[0055] Specifically, the lower end of the servo hydraulic cylinder 17 is fixedly connected to the base through the second Hooke's hinge 18, so that the servo hydraulic cylinder 17 can swing within a certain angle when extending and retracting. Figure 4 , Figure 5 As shown, the second Hooke's hinge 18 includes a second lower hinge seat 181, a second upper hinge body 183 and a second connecting rod 182, and the second lower hinge seat 181 is fixedly connected to the fixed block. The second lower hinge seat 181 includes two parallel connecting ears, and the connecting ears have a hinge hole. The second connecting rod 182 is hinged between the two connecting ears through a hinge rod. The second upper hinge body 183 has two, and the two second upper hinge bodies 183 are hinged on both sides of the second connecting rod 182. The rotation axis of the second upper hinge body 183 and the second connecting rod 182 and the rotation axis of the second connecting rod 182 and the second lower hinge seat 181 are perpendicular. The second upper hinge body 183 is fixedly connected to the lower end of the servo hydraulic cylinder 17 by bolts.

[0056] Reference Figure 3 As shown, the upper end of the servo hydraulic cylinder 17 is connected to the lower side of the test bench 16 by a ball joint. Specifically, the upper end of the servo hydraulic cylinder 17 has a stud, and a ball head is threadedly connected to the stud. A ball head seat 21 matching the ball head has two ears, and a fixing hole 22 is opened on the ear. The lower side of the test bench 16 has a fixing hole 161 corresponding to the fixing hole.

[0057] A displacement sensor is installed on the servo hydraulic cylinder 17 . When the servo hydraulic cylinder 17 is extended or retracted, the displacement sensor can detect the extension length of the servo hydraulic cylinder 17 , thereby accurately controlling the extension length of the servo hydraulic cylinder 17 .

[0058] like Figure 6 , Figure 7 , Figure 8 As shown, the bottom plate 1 includes a frame and a panel fixedly connected to the upper side of the frame. The panel has a through hole at the center thereof penetrating the upper and lower sides of the panel, and a mounting plate is fixedly connected in the through hole. The mounting plate is provided with a step hole 14 penetrating the upper and lower sides of the mounting plate, and a plurality of fixing bolts are installed on the steps of the step hole 14. The panel is fixedly connected to the two sides of the step hole 14 with the mark rods 4 extending upward.

[0059] Reference Fig. 9 As shown, the base 2 includes a frame and an outer plate wrapped around the outside of the frame, and a through hole 24 is provided at the center of the upper outer plate, penetrating the upper and lower sides of the base 2, and the through hole 24 is correspondingly connected to the step hole 14 on the bottom plate 1. The outer plate has avoidance grooves on both sides of the through hole 24 for the pole 4 on the bottom plate 1 to pass upward.

[0060] In this embodiment, the base 2 and the bottom plate 1 are rotatably assembled through a bearing. Specifically, a fixing plate 9 is installed in the through hole of the bottom plate 1, a through hole is opened in the center of the fixing plate 9, and a connecting sleeve 10 is fixedly connected to the lower side of the fixing plate 9 by bolts. Fig.14 As shown, the connecting sleeve 10 is a T-shaped structure, and the T-shaped connecting sleeve 10 includes a horizontal portion 101 and a vertical portion 102. The horizontal portion 101 has a plurality of fixing holes arranged circumferentially and penetrating the horizontal portion 101 vertically, and bolts for connecting with the fixing plate 9 are installed in the fixing holes. The center hole of the connecting sleeve 10 and the through hole of the fixing plate 9 are equidiametrically connected. A plane bearing is mounted on the vertical portion 102 of the connecting sleeve 10, and preferably, the plane bearing is a plane thrust ball bearing 11. The upper end surface of the plane thrust ball bearing 11 is fixedly connected to the horizontal portion 101 of the connecting sleeve 10 by bolts.

[0061] A connecting ring 12 is fixedly connected to the step hole 14 of the bottom plate 1 by bolts. Fig.13 , 15 As shown, the connecting ring 12 is embedded in the large diameter section of the step hole 14, and the center of the connecting ring 12 has a center hole that is equal in diameter to the small diameter section of the step hole 14. The vertical portion 102 of the connecting sleeve 10 is embedded in the center hole of the connecting ring 12 and the small diameter section of the step hole 14. The outer peripheral wall of the connecting ring 12 has a flange 13 extending upward, and an annulus is provided between the flange 13 and the connecting sleeve 10. The lower end of the plane thrust ball bearing 11 is embedded in the annulus, and the lower end face of the plane thrust ball bearing 11 is fixedly connected to the connecting ring 12 by bolts. The base 2 is relatively fixed to the upper end face of the plane thrust ball bearing 11, and the bottom plate 1 is opposite to the lower end face of the plane thrust ball bearing 11, so as to realize the rotational assembly of the base 2 and the bottom plate 1.

[0062] In this embodiment, the first driving mechanism includes a motor 5, a reducer and a rotating shaft 8. Fig.10 , Fig.11 , Fig.12As shown, the motor 5 is connected to the reducer in a transmission manner, and the reducer is a worm gear reducer 6. The worm gear reducer 6 is fixedly connected to the base 2 through a reducer fixing seat 7, and the reducer fixing seat 7 includes a bottom plate 1, a vertical plate, and a reinforcing plate connected between the bottom plate 1 and the vertical plate. The bottom plate 1 has a connecting hole fixedly connected to the base 2, and the vertical plate has a fixing hole fixedly connected to the worm gear reducer 6. The worm gear reducer 6 is connected to the rotating shaft 8 through a key, and the output end of the worm gear reducer 6 has a socket 61, and the socket 61 has a keyway, and the rotating shaft 8 has a connecting key 84 matching the keyway. In this embodiment, the rotating shaft 8 is a variable diameter shaft, and the rotating shaft 8 includes a large diameter section, a small diameter section, and a connecting flange 83 fixedly connected to the end of the large diameter section. The small diameter section of the rotating shaft 8 is fixedly matched with the worm gear reducer 6, and the keyway is axially arranged on the small diameter section of the rotating shaft 8. The large diameter section is inserted into the connecting sleeve 10. A fixing plate is fixedly connected to the lower end of the base plate 1. The middle part of the fixing plate has a positioning hole that matches the positioning protrusion on the lower side of the rotating shaft 8. The fixing plate has a fixing hole that passes through the connecting hole of the connecting flange 83. The connecting flange 83 and the fixing plate are fixed by bolts to achieve a fixed connection between the rotating shaft 8 and the base plate 1.

[0063] In this embodiment, the avoidance groove is an arc-shaped avoidance groove, so that when the driving mechanism drives the base 2 to rotate, the mark rod 4 can move in the base 2. The openings of the two arc-shaped avoidance grooves 23 on the base 2 are arranged opposite to each other, and a scale is fixedly connected to the groove edge of the avoidance groove 23. When the base 2 and the bottom plate 1 do not rotate relative to each other, the mark rod 4 corresponds to zero degree on the scale.

[0064] In this embodiment, the base 2 and the bottom plate 1 are both rectangular structures, and air springs 3 are respectively installed at the four corners of the rectangular bottom plate 1. A support plate 20 is arranged on the lower side of the bottom plate 1, and a cushion block 19 is provided at the position of the support plate corresponding to the air spring 3.

[0065] Reference Fig.16 , Fig.17 , Fig.18 , Fig.19As shown, the test bench includes a frame and a swing platform 27 rotatably assembled in the frame, and the rotation axis of the swing platform 27 extends in the front-to-back direction. In this embodiment, the frame is a rectangular frame, and the swing platform 27 is a rectangular plate. The front and rear sides of the frame are respectively provided with a first driving mechanism and a braking mechanism. In this embodiment, the first driving mechanism includes a motor 30 and a reducer 31, and the reducer 31 is specifically a worm gear reducer. The first driving mechanism is installed at the front end of the frame, and the motor 30 and the reducer 31 are connected in a transmission manner. A first rotating shaft portion is connected between the output shaft of the reducer 31 and the swing platform 27, and the first rotating shaft portion is a transmission shaft. The first rotating shaft portion is used to connect to the swing platform 27 with a flange plate on one side facing the swing platform 27. In this embodiment, the braking mechanism is installed at the rear end of the frame, and the braking mechanism includes a brake disc 32 and a brake 31. In this embodiment, the second rotating shaft portion is also a transmission shaft. One end of the second rotating shaft portion is connected and fixed to the swing platform 27 through a flange, and the brake disc 32 is integrally arranged at the other end of the second rotating shaft portion. When the swing platform 27 swings to a set angle, the swing angle of the swing platform 27 can be fixed by clamping the brake disc 32 with the brake 31.

[0066] In this embodiment, the front and rear ends of the swing platform 27 are also provided with a first bearing group 33 and a second bearing group 34, respectively. The first bearing group 33 includes a bearing housing and a bearing installed in the bearing housing. The first shaft portion and the second shaft portion are both rotatably assembled in the corresponding bearing group. Specifically, the first bearing group 33 is used to support the middle position of the first shaft portion, and the second bearing group 34 is used to support the middle position of the second shaft portion. In this embodiment, the first shaft portion and the second shaft portion are coaxially arranged, so that the swing platform 27 will rotate around the first shaft portion and the second shaft portion. In other embodiments, the first shaft portion and the second shaft portion can also be arranged on the same transmission shaft. In this embodiment, end plate structures are also fixed at the front and rear ends of the swing platform 27. The end plate structures are installation plates arranged at the front and rear ends of the swing platform 27. Both end plate structures are arranged vertically with the swing platform 27. The arrangement of the end plate structures increases the end surface area of ​​the swing platform 27, thereby facilitating the flange connection between the first shaft portion and the swing platform 27, and the second shaft portion and the swing platform 27.

[0067] In this embodiment, a gantry structure is provided at both the front and rear ends of the frame. The gantry structure is a door-shaped connecting frame installed at the front and rear ends of the platform frame. The gantry structure is mainly used to fix the connection with the rope of the pulling dynamic test bench. The rope is mainly set to suspend the dynamic test bench to prevent the dynamic test bench from falling when the servo hydraulic cylinder fails.

[0068] In this embodiment, a connection seat 28 is provided on both sides of the frame, and the cross section of the connection seat 28 is an isosceles trapezoid. The connection seat 28 is provided with a fixing hole for inserting a pin 29. When the test bench is not in use, the pins 29 are inserted into the fixing holes, and then the pins 29 are fixedly connected to the gantry bracket 25 by screws or bolts, so that the test bench can be stopped at the set position by the pins 29.

[0069] In order to facilitate the measurement of the swing angle of the swing platform 27, in this embodiment, an arc scale is provided on the brake disc 32, and an indicator needle for indicating the scale of the arc scale is provided on the frame. When the brake disc 32 rotates with the second rotating shaft portion, the arc scale will also rotate. The swing angle of the swing platform 27 can be measured by reading the value indicated by the indicator needle.

[0070] In this embodiment, the swing platform 27 includes a flat plate structure and a reinforcing structure fixed to the bottom of the flat plate structure. The flat plate structure is a rectangular flat plate, and the reinforcing structure is a reinforcing rib welded and fixed to the bottom of the rectangular flat plate.

[0071] In order to enhance the stability of the structure, an auxiliary support is also fixedly connected to the base. The auxiliary support includes a telescopic rod 36 and a support frame 35 supported at the bottom of the telescopic rod 36. The bottom of the support frame 35 is fixedly connected to the base by screws. The telescopic rod 36 and the support frame 35 are connected and fixed by flanges. The top of the telescopic rod 36 is connected and fixed to the swing platform 27 by a first Hooke's hinge. The first Hooke's hinge includes a first lower hinge seat 37, a first upper hinge body 39 and a first connecting rod 38. The first lower hinge seat 37 is fixedly connected to the telescopic rod 36, the first upper hinge body 39 is fixedly connected to the swing platform 27, the upper end of the first connecting rod 38 is hinged to the first upper hinge body 39, and the lower end is hinged to the first lower hinge seat 37. The rotation axis of the first connecting rod 38 and the first lower hinge seat 37 and the rotation axis of the first connecting rod 38 and the first upper hinge body 39 are perpendicular. The first Hooke's hinge enables the swing platform 27 to swing left and right and front and back around the top of the auxiliary support. In this embodiment, the telescopic rod 36 is a jack. The first Hooke's hinge constraint ensures that the test bench always swings around the center position. During the installation of the entire test platform, the telescopic rod can pre-adjust the height position of the entire moving platform. Once the adjustment is completed, it can be locked with a bolt locking device.

[0072] Reference Fig. 20 , Fig.21As shown, a gantry bracket 25 is fixedly connected to the base, and a flexible traction mechanism 26 is slidably mounted on the gantry bracket 25. The flexible traction mechanism 26 includes a traction rope and a rotating assembly structure 267 arranged at both ends of the traction rope, the rotating assembly structure 267 is used for rotating assembly with the test bench, and a length adjustment structure 266 is further arranged between each rotating assembly structure 267 and the traction rope, and the length adjustment structure 266 is used to adjust the overall length of the flexible traction mechanism 26 to adjust the tightness of the flexible traction mechanism 26.

[0073] The gantry support 25 includes two support columns 251 arranged opposite to each other and a support beam 253 extending between the two support columns 251. In this embodiment, the support beam 253 is an I-beam, and the two support columns 251 are both triangular frames. Each support column 251 is welded and formed by rectangular steel, and the support column includes an isosceles triangle-shaped outer frame and a plurality of inner supports welded in the outer frame. There are two flexible traction mechanisms 26, and the two flexible traction mechanisms 26 can be divided into a transverse traction mechanism 261 and a longitudinal traction mechanism 262 according to different extension directions, wherein the transverse traction mechanism 261 is arranged along the extension direction of the support beam 253, and the longitudinal traction mechanism 262 is arranged perpendicular to the support beam 253.

[0074] In this embodiment, the flexible traction mechanism 26 includes a traction rope, which is specifically a steel wire rope. The flexible traction mechanism 26 also includes a rotating assembly structure 267 and a length adjustment structure 266 arranged at both ends of the traction rope. The length adjustment structure 266 and the traction rope, and the length adjustment structure 266 and the rotating assembly structure 267 are connected by hanging rings. The rotating assembly structure 267 includes a rotating shaft and a plurality of bearings arranged on the rotating shaft. The test bench is provided with a mounting hole for the rotating assembly structure 267 to pass through. In addition, in order to prevent the rotating shaft from coming out of the mounting hole, a sleeve is provided on the outer side of the rotating shaft, and the outer peripheral side of the sleeve is stepped. Bearings of different diameters are correspondingly arranged at different diameters of the sleeve, and correspondingly, the mounting hole is also a stepped hole. In this embodiment, a hanging ring is provided at one end of the rotating shaft, and an external thread is provided on the outer peripheral side of the rotating shaft. The rotating shaft is connected and fixed to the sleeve by threaded assembly. During the installation process, each bearing is first placed in the mounting hole, and then the sleeve is inserted into the mounting hole from the side with a larger aperture of the mounting hole, and the rotating shaft is screwed into the sleeve from the side with a smaller aperture of the mounting hole. Finally, the end cover is fixed at the end with a larger aperture of the mounting hole. The end cover is installed by screw fixing. The end cover can stop and limit the ends of the bearing and the sleeve, thereby avoiding the situation where the rotating assembly structure 267 falls out of the mounting hole.

[0075] In this embodiment, the length adjustment structure 266 includes a threaded sleeve and a threaded column threadedly assembled in the threaded sleeve. The threaded sleeve is provided with an internal thread, and both ends of the threaded sleeve are threadedly assembled with a threaded column, and each threaded column is provided with a hanging ring at the end outside the threaded sleeve. When the length needs to be adjusted, it can be done by screwing the threaded sleeve or the threaded column.

[0076] Since the traction rope is slidably assembled on the gantry bracket 25, in order to reduce the friction between the traction rope and the gantry bracket 25, a roller structure 263 is further provided on the gantry bracket 25 in this embodiment. The roller structure 263 includes a sliding roller and a limiting cover 265 provided on the outer peripheral side of the sliding roller. The sliding roller is a concave wheel, that is, an annular groove for the traction rope to be inserted laterally is provided on the outer peripheral surface of the sliding roller. In this embodiment, the limiting cover 265 is in the shape of a U-shaped groove, and a gap is formed between the limiting cover 265 and the sliding roller for the traction rope to pass through. The setting of the limiting cover 265 can prevent the traction rope from escaping from the roller structure 263, thereby ensuring the safety and stability of the operation. The longitudinal traction mechanism 262 is correspondingly provided with a roller structure 263, and the roller structure 263 is arranged at the middle position of the support beam 253, while the transverse traction mechanism 261 is correspondingly provided with four roller structures 263, two of which are arranged at the two end positions of the support beam 253, and the remaining two roller structures 263 are respectively arranged on the corresponding support columns 251.

[0077] Since both ends of the lateral traction mechanism 261 need to bypass the support column 251 to be connected to the test bench, in order to facilitate the connection of the lateral traction mechanism 261, a through hole 252 is provided on each support column 251. Since the support column 251 in this embodiment is a triangular frame structure, the gap (through hole) inside the support column 251 constitutes the through hole 252.

[0078] In this embodiment, Figures 22 to 33As shown, the space loading upright bearing test bench includes a driving motor 40, a transmission shaft 51, a unloading mechanism 42, a test shaft 49, a flexible loading device 45 and a bearing support, one end of the transmission shaft 51 is transmission-connected to the driving motor 40, and the other end is transmission-connected to the test shaft 49, the unloading mechanism 42 is used to remove the deflection and vibration of the transmission shaft 51; the test shaft 49 is used to fit the sliding bearing 81; the flexible loading device 45 includes a suspension assembly 50 and a plurality of lifting mechanisms 66 arranged at intervals along the outer peripheral side of the suspension assembly 50, the suspension assembly 50 is provided with a slot structure 77 for assembling the sliding bearing 81 and the test shaft 49, the lifting mechanism 66 includes a flexible member 72, a first telescopic cylinder 69 and a second telescopic cylinder 68, one end of the flexible member 72 is connected to the driving end of the first telescopic cylinder 69 The other end is used for connection with the suspension assembly 50, the driving end of the second telescopic cylinder 68 faces upward and is supported in the middle of the flexible member 72; there are two bearing supports, which are respectively located at the two ends of the test shaft 49 and are rotatably assembled with the test shaft 49, and an intermediate partition 54 is arranged in the bearing support, and the intermediate partition 54 divides the inner cavity of the bearing support into two oil storage cavities 57, and a through hole 55 connecting the two oil storage cavities 57 is arranged on the intermediate partition 54, and a mounting hole for assembling a support bearing 59 is also arranged on the intermediate partition 54, and the outer ring of the support bearing 59 is fixedly assembled with the intermediate partition 54, and an oil inlet 65 and an oil outlet 64 connected with the inner cavity of the bearing support are arranged on the bearing support, and a shaft vibration sensor for monitoring the vibration of the test shaft 49 is also installed in the bearing support.

[0079] Specifically, in this embodiment, the driving motor 40 is a servo motor, and a motor base 52 is provided at the bottom of the driving motor 40. In this embodiment, the main shaft of the driving motor 40 is connected to the transmission shaft 51 in a transmission connection manner, and the transmission connection mode is specifically a synchronous belt 41 transmission, that is, a large pulley is provided on the main shaft of the driving motor 40, and a small pulley is provided at the corresponding end of the transmission shaft 51. The diameter of the large pulley is larger than that of the small pulley, and the synchronous belt 41 is wound around the outer circumference of the large pulley and the small pulley at the same time. When the main shaft of the driving motor 40 rotates, the large pulley will drive the synchronous belt 41 to rotate, and the synchronous belt 41 will drive the small pulley to rotate, thereby realizing the rotation drive of the transmission shaft 51. In this embodiment, since the diameter of the large pulley is larger than that of the small pulley, the rotation angular velocity of the small pulley is faster than that of the large pulley.

[0080] In order to reduce the vibration of the drive motor 40, in this embodiment, a vibration isolation pad is provided between the drive motor 40 and the motor base 52. Four vibration isolation pads are provided, and the four vibration isolation pads are respectively located at the four bottom corners of the drive motor 40. In this embodiment, the vibration isolation pad is specifically a rubber pad. In this embodiment, the drive motor 40 is installed on the motor base 52 by fixing bolts 48 and fixing nuts. The four bottom corners of the drive motor 40 are all installed with fixing bolts 48. In this embodiment, the motor base 52 is provided with a long hole for the fixing bolts 48 to pass through. Corresponding to the fixing bolts 48, in this embodiment, four long holes are provided on the motor base 52. Each long hole is perpendicular to the extension direction of the main shaft of the drive motor 40, so that the fixing bolts 48 can slide horizontally in the long hole, thereby realizing the movement of the position of the drive motor 40. When the position of the drive motor 40 is adjusted to the right position, in order to fix the position of the drive motor 40, in this embodiment, four adjustment blocks 46 are welded and fixed on the motor base 52, and the four adjustment blocks 46 are divided into two rows, and the drive motor 40 is installed between the two rows of adjustment blocks 46. In this embodiment, an adjustment bolt 47 is threadedly assembled on each adjustment block 46, and each adjustment bolt 47 is extended along the extension direction of the long hole. When the drive motor 40 is adjusted along each long hole, the adjustment bolts 47 on both sides of the drive motor 40 are rotated to the position where the drive motor 40 presses and contacts. In this way, the position of the drive motor 40 can be fixed by clamping and fixing the adjustment bolts 47 on both sides. It should be noted that since the main shaft of the drive motor 40 is connected to the transmission shaft 51 through the synchronous belt 41, when the tightness of the synchronous belt 41 needs to be adjusted, the drive motor 40 can be moved along the long hole. After moving to the right position, the adjustment bolts 47 on both sides of the drive motor 40 are rotated to the position where the drive motor 40 presses and contacts.

[0081] In this embodiment, the transmission shaft 51 is a transmission rod, one end of which is transmission-connected to the synchronous belt 41, and the other end of which is transmission-connected to the test shaft 49 through a coupling. Since the synchronous belt 41 will apply lateral force to the transmission shaft 51, in order to avoid the transmission shaft 51 from bending greatly, a unloading mechanism 42 is also installed at the transmission shaft 51 in this embodiment. The unloading mechanism 42 includes an unloading bearing seat and an unloading base, and the unloading bearing seat is installed on the unloading base. An unloading bearing is installed in the unloading bearing seat, and the unloading bearing is specifically an angular contact ball bearing. In this embodiment, there are two unloading bearings, and an unloading mounting hole for mounting two unloading bearings is provided on the unloading bearing seat. A front sealing cover and a rear sealing cover are also installed at both ends of the unloading mounting hole, and the two unloading bearings are clamped between the front sealing cover and the rear sealing cover. In this embodiment, the two unloading bearings are spaced a certain distance apart, and a spacer for separating the two unloading bearings is sleeved on the outer peripheral side of the transmission shaft 51. In this embodiment, the transmission shaft 51 is inserted into the inner rings of two unloading bearings, and the tension and vibration of the synchronous belt 41 are weakened by the radial limiting effect of the unloading bearings.

[0082] In this embodiment, the test shaft 49 is a rotating rod, and one end of the test shaft 49 is in transmission connection with the transmission shaft 51. In this embodiment, the test shaft 49 and the transmission shaft 51 are coaxially arranged. In order to keep the test shaft 49 at a set position, this embodiment also includes two bearing supports. For the convenience of description, in this embodiment, the bearing support close to the transmission shaft 51 is called the right bearing support 43, and the other bearing support is called the left bearing support 44.

[0083] In the present embodiment, the interior of the left bearing support 44 is hollow, and a support bearing 59 is installed in the left bearing support 44. The left end of the test shaft 49 penetrates from the right side of the left bearing support 44, and then passes through the inner ring of the support bearing 59. In the present embodiment, the left end of the test shaft 49 is located in the left bearing support 44. In order to achieve a sealing effect, a thrust end cover 53 is installed on the left side of the left bearing support 44 in the present embodiment. The thrust end cover 53 is installed by screw sealing. In the present embodiment, the thrust end cover 53 is also used to block the left end of the test shaft 49 to prevent the test shaft 49 from extending out of the left bearing support 44.

[0084] In this embodiment, a middle partition 54 is arranged in the cavity of the left bearing support 44, and the middle partition 54 divides the left bearing support 44 into two left and right oil storage chambers 57. The middle partition 54 is provided with a mounting hole for mounting a support bearing 59. In order to constrain the support bearing 59, an annular groove is arranged on the outer ring of the support bearing 59 in this embodiment. During assembly, the middle partition 54 will be partially embedded in the annular groove. In order to further constrain the support bearing 59, an anti-rotation rod 58 is also installed on the left bearing support 44 in this embodiment. The anti-rotation rod 58 is threadedly assembled on the left bearing support 44, and an anti-rotation hole is arranged on the outer ring of the support bearing 59 for the end of the anti-rotation rod 58 to be inserted. The support bearing 59 is constrained by the stop limit of the anti-rotation rod 58 and the wall of the anti-rotation hole.

[0085] In this embodiment, the two oil storage chambers 57 are used to store lubricating oil. In order to realize the circulation of lubricating oil, an oil inlet 65 and an oil outlet 64 are provided on the left bearing support 44. In order to facilitate the reflux of lubricating oil, the setting position of the oil inlet 65 in this embodiment is higher than the setting position of the oil outlet 64. In addition, in order to realize the communication between the two oil storage chambers 57, a through hole 55 is also provided on the middle partition 54 in this embodiment. During the detection process, the lubricating oil flows into the left bearing support 44 from the oil inlet 65, and then flows back to the lubricating oil tank from the oil outlet 64, thereby realizing the circulation lubrication.

[0086] In order to prevent the lubricating oil from overflowing along the test shaft 49, in this embodiment, an oil scraper cover is also installed on the left bearing support 44. The oil scraper cover is arranged opposite to the thrust cover 53. A through hole is arranged in the oil scraper cover for the test shaft 49 to pass through. An oil collecting structure for preventing the lubricating oil from leaking out is arranged between the oil scraper cover and the test shaft 49. In this embodiment, the oil collecting structure includes an oil slinging ring groove 60 arranged on the outer peripheral side of the test shaft 49 and a circumferential oil groove 61 arranged on the oil scraper cover. The notch of the circumferential oil groove 61 is arranged opposite to the notch of the oil slinging ring groove 60. In this embodiment, the cross-sectional dimension of the circumferential oil groove 61 is much larger than the cross-sectional dimension of the oil slinging ring groove 60. The cross-sectional dimension of the circumferential oil groove 61 is rectangular, and the cross-sectional dimension of the oil slinging ring groove 60 is V-shaped. The notch of the circumferential oil groove 61 covers the groove of the oil slinging ring groove 60 on the inner side. In this embodiment, an oil return hole 63 is also arranged on the oil scraper cover to connect the circumferential oil groove 61 with the oil storage chamber 57. In this embodiment, the lubricating oil will flow along the test shaft 49. When it flows to the oil scraper end cover, the oil-slinging ring groove 60 arranged along the shaft will throw the overflowing lubricating oil into the circumferential oil groove 61 under the action of centrifugal force, and then the lubricating oil will flow back to the oil storage chamber 57 again. In this embodiment, two V-shaped ring grooves 62 are also arranged on the oil scraper end cover. The two V-shaped grooves are respectively located on the left and right sides of the circumferential oil groove 61 and are arranged in parallel with the circumferential oil groove 61, that is, the notch direction of the V-shaped ring groove 62 is the same as the notch direction of the circumferential oil groove 61. The two V-shaped ring grooves 62 can play the role of storing lubricating oil, thereby enhancing the sealing between the test shaft 49 and the oil scraper end cover.

[0087] In order to monitor the vibration at both ends of the test shaft 49, in this embodiment, a U-shaped frame 56 is installed in one of the oil storage chambers 57 of the left bearing support 44, and the test shaft 49 passes through the middle of the U-shaped frame 56. A shaft vibration sensor is fixed to the top thread of the U-shaped frame 56. In this embodiment, the shaft vibration sensor is specifically an eddy current sensor. It should be noted that in this embodiment, an eddy current sensor is also installed in the right bearing support 43, and the two eddy current sensors can monitor the shaft vibration at both ends of the test shaft 49 respectively.

[0088] In this embodiment, the internal structure of the right bearing support 43 is the same as the internal structure of the left bearing support and is arranged in mirror symmetry, which will not be described in detail in this embodiment. The difference between the right bearing support 43 and the left bearing support 44 is that, in order to allow the test shaft 49 to pass through the left bearing support 44, an oil scraper end cover is provided on both sides of the right bearing support 43 in this embodiment. Since the oil scraper end cover of the right bearing support 43 and the oil scraper end cover of the left bearing support 44 have the same structure, they will not be described in detail in this embodiment.

[0089] In this embodiment, the flexible loading device 45 includes a suspension assembly 50 and a plurality of lifting mechanisms 66 arranged at intervals along the outer peripheral side of the suspension assembly 50; there are four lifting mechanisms 66, and the four lifting mechanisms 66 are respectively arranged at four positions of the suspension assembly 50, and the suspension assembly 50 is located at the center position of the four lifting mechanisms 66.

[0090] In this embodiment, each lifting mechanism 66 includes a first telescopic cylinder 69 and a second telescopic cylinder 68 arranged in parallel. The first telescopic cylinder 69 and the second telescopic cylinder 68 are both arranged to extend in the vertical direction and the driving ends are both located at the top. In this embodiment, the first telescopic cylinder 69 and the second telescopic cylinder 68 are both hydraulic telescopic cylinders. In other embodiments, the first telescopic cylinder 69 and the second telescopic cylinder 68 can also be electric push rods, cylinders, etc. In this embodiment, the size of the first telescopic cylinder 69 is smaller than the size of the second telescopic cylinder 68, and the second telescopic cylinder 68 is located between the suspension assembly and the first telescopic cylinder 69. In this embodiment, the flexible member 72 is a steel wire rope. In other embodiments, the flexible member 72 can also be a hemp rope, a chain, a high-strength carbon fiber rope, etc. One end of the flexible member 72 is connected and fixed to the driving end of the first telescopic cylinder 69, and the other end is used to connect to the suspension assembly. In this embodiment, the second telescopic cylinder 68 is supported at the middle position of the flexible member 72. Since the size of the second telescopic cylinder 68 is larger, the flexible member 72 as a whole presents an arched shape with the middle bulging upward and the two ends extending downward.

[0091] Since the flexible member 72 is to pull the suspension assembly to move, in order to avoid the rigid pulling between the suspension assembly and the flexible member 72, a buffer member 70 is installed between the flexible member 72 and the suspension assembly in this embodiment. The buffer member 70 is a tension spring in this embodiment. In other embodiments, the buffer member 70 can also be installed at a position between the flexible member 72 and the first telescopic cylinder 69.

[0092] In order to facilitate the observation of the force applied by each flexible member 72, a tension sensor 71 is also installed between the buffer member 70 and the suspension assembly in this embodiment. The tension sensor 71 can monitor the force between the flexible member 72 and the suspension assembly in real time, so that the staff can obtain the corresponding tension data in time. In other embodiments, the tension sensor 71 can also be installed at other positions such as between the flexible member 72 and the first telescopic cylinder 69.

[0093] Since the flexible member 72 needs to go around the top (driving end) of the second telescopic cylinder 68, in order to avoid the situation where the flexible member 72 is easily worn due to large friction, a first pulley assembly 73 is installed on the top of the second telescopic cylinder 68 in this embodiment. In order to prevent the flexible member 72 from easily detaching from the first pulley assembly 73, the first pulley assembly 73 in this embodiment includes three pulleys, which are arranged in a straight line, and the flexible member 72 goes around the corresponding pulleys in a wave shape.

[0094] In order to avoid the flexible member 72 from contacting the second telescopic cylinder 68, a second pulley assembly 74 is further installed on the cylinder wall of the second telescopic cylinder 68 in this embodiment. In this embodiment, the second pulley assembly 74 includes only one pulley, which is supported between the second telescopic cylinder 68 and the flexible member 72, thereby avoiding the flexible member 72 from contacting the second telescopic cylinder 68. It should be noted that in order to further achieve the limiting effect on the flexible member 72, each pulley in this embodiment is a concave pulley, that is, the outer peripheral surface of each pulley is provided with an annular groove for the flexible member 72 to be inserted laterally.

[0095] Since the first pulley assembly 73 moves up and down with the extension and retraction of the second telescopic cylinder 68, in order to enhance the guiding effect, in this embodiment, a guide plate 75 is further installed on the cylinder wall of the second telescopic cylinder 68, and the guide plate 75 is also extended in the up and down direction. In this embodiment, there are two guide plates 75, which are symmetrically arranged on both sides of the second telescopic cylinder 68, and each guide plate 75 is provided with a guide groove, and the corresponding two sides of the first pulley assembly 73 are provided with a slider protrusion inserted into the corresponding guide groove, and the slider protrusion can slide in the guide groove, and the guiding effect is enhanced by the limiting effect of the slider protrusion and the guide groove.

[0096] In this embodiment, the suspension assembly includes an inner liner 80 and an outer shell 78, wherein the inner liner 80 is installed on the inner side of the outer shell 78. Since a sliding bearing 81 is to be installed in the suspension assembly, in order to facilitate the installation of the sliding bearing 81, in this embodiment, the inner liner 80 and the outer shell 78 are both separately detachable. Specifically, in this embodiment, the suspension assembly is spherical, the outer shell 78 is correspondingly a spherical outer shell 78, and the inner liner 80 is also a spherical structure. In this embodiment, the outer shell 78 includes two upper and lower parts, both of which are hemispherical, and the inner liner 80 also includes two upper and lower parts, both of which are hemispherical. The two parts of the outer shell 78 are fixed by bolts, and the two parts of the inner liner 80 are also fixed by bolts. In this embodiment, the inner liner 80 can rotate in the outer shell 78. In order to limit the rotation direction, in this embodiment, a long strip protrusion is provided on the outer peripheral surface of the inner liner 80, and a guide groove for the transverse insertion of the long strip protrusion is correspondingly provided on the inner wall of the outer shell 78.

[0097] In this embodiment, the inner liner 80 is provided with a slot structure 77 for installing the sliding bearing 81 and the test shaft 49. In this embodiment, the slot structure 77 includes a circle of annular grooves provided on the inner wall of the inner liner 80, and also includes a circular through hole that penetrates the inner liner 80 and the outer shell 78 at the same time. When installing the sliding bearing 81, the sliding bearing 81 is horizontally inserted into the annular groove of half of the inner liner 80, and then the other half of the inner liner 80 is buckled. The test shaft 49 will also be buckled into the circular through hole accordingly.

[0098] In this embodiment, each suspension assembly and each tension sensor 71 are connected by a ball joint. The ball joint includes a spherical shell and a sphere. In this embodiment, the shape of the spherical shell is cylindrical. The spherical shell is fixedly connected to the tension sensor 71, and the sphere is fixedly connected to the outer shell 78 of the suspension assembly.

[0099] In order to avoid the situation that the flexible member 72 needs to pull the suspension assembly when not testing, a support platform 79 is provided below the suspension assembly in this embodiment, and a limiting groove matching the bottom shape of the suspension assembly is provided on the top surface of the support platform 79. Since the suspension assembly in this embodiment is spherical, the limiting groove in this embodiment is also a curved groove.

[0100] In this embodiment, a suspension base frame 76 is also installed at the bottom of the support platform 79. In this embodiment, the suspension base frame 76, the left bearing support 44, and the right bearing support 43 are all installed on the same base plate. In this embodiment, a lifting base 67 is also installed at the bottom of each lifting mechanism 66.

[0101] The working process of the present invention is as follows: when testing is required, the sliding bearing 81 is first fixed on the test shaft 49, and then the sliding bearing 81 and the test shaft 49 are installed in the slot structure 77 of the suspension assembly, and then the tension applied by the corresponding flexible member 72 can be adjusted by adjusting the telescopic amount of the first telescopic cylinder 69 and the second telescopic cylinder 68 of each lifting mechanism 66, thereby realizing the adjustment setting of the loading force of the sliding bearing 81, and finally starting the drive motor 40, the drive motor 40 will drive the test shaft 49 to rotate, and the operation of the sliding bearing 81 can be observed.

[0102] It should be noted that, in actual working conditions, the direction of gravity on the bearing remains unchanged. In order to make the simulation test process more in line with the actual working conditions, it is necessary to ensure that the force effect applied to the test bearing should always be in the vertical direction. In this embodiment, since the suspension assembly 40 applies dynamic loading through four flexible parts 47, when the suspension assembly 40 performs swing detection, the four flexible parts 47 will be dynamically adjusted. Since the gravity direction of the suspension assembly remains unchanged, the direction of the dynamic loading resultant force of the four flexible parts 47 is always vertically upward, thereby achieving the effect of controlling the direction of the loading resultant force vector, and realizing the detection of the fatigue, life and other performance of the bearing under the dynamic swing test environment.

[0103] In summary, the embodiment of the present invention provides a marine bearing sway test device. During the test, the traction force of each flexible member 72 can be adjusted by adjusting the extension and contraction amount of the first telescopic cylinder 69 and the second telescopic cylinder 68, and the resultant force formed by the traction force of each flexible member 72 will also be adjusted accordingly, thereby achieving a flexible change in the direction of applied load and facilitating the detection of the sliding bearing 81. In addition, in the present invention, by providing an unloading mechanism 42 and a transmission shaft 51, the deflection and vibration caused by the driving mechanism can be weakened and will not be directly transmitted to the test shaft 49, thus ensuring the accuracy of the test results. In the present invention, an oil inlet 65, an oil outlet 64, an oil storage chamber 57, etc. are provided on the bearing support, so that the support bearing 59 and the test shaft 49 can be lubricated by a circulating oil circuit, thereby improving the lubrication effect.

[0104] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. Marine bearing swing test device, characterized by: The invention comprises a swing and tilt test device, wherein the swing and tilt test device comprises a test bench, and the marine bearing swing test device further comprises a space-loaded upright bearing test bench located on the test bench, wherein the space-loaded upright bearing test bench comprises a driving motor, a transmission shaft, a unloading mechanism, a test shaft, a flexible loading device and a bearing support, wherein one end of the transmission shaft is transmission-connected to the driving motor and the other end is transmission-connected to the test bearing, and the unloading mechanism is used to unload the deflection and vibration of the transmission shaft; the test shaft is used to set a sliding bearing; the flexible loading device comprises a suspension assembly and a plurality of lifting mechanisms arranged at intervals along the outer peripheral side of the suspension assembly, a slot structure for assembling sliding bearings and the test shaft is arranged in the suspension assembly, the lifting mechanism comprises a flexible part, a first telescopic cylinder and a second telescopic cylinder, wherein one end of the flexible part is connected to the driving end of the first telescopic cylinder and the other end is used to be connected to the suspension assembly, and the driving end of the second telescopic cylinder faces upward and is supported in the middle of the flexible part; there are two bearing supports, which are respectively located on the two sides of the test shaft The ends are both rotatably assembled with the test shaft, an intermediate partition is arranged in the bearing support, the intermediate partition divides the inner cavity of the bearing support into two oil storage cavities, a through hole communicating with the two oil storage cavities is arranged on the intermediate partition, a mounting hole for assembling the support bearing is also arranged on the intermediate partition, the outer ring of the support bearing is non-rotatably assembled with the intermediate partition, an oil inlet and an oil outlet communicating with the inner cavity of the bearing support are arranged on the bearing support, a shaft vibration sensor for monitoring the vibration of the test shaft is also installed in the bearing support; The bearing support on one side near the transmission shaft is set as the right bearing support, and the other is set as the left bearing support. The test shaft passes through the left and right sides of the right bearing support, and the left end of the test shaft is located in the left bearing support. The left and right sides of the right bearing support and the right side of the left bearing support are provided with oil scraping end covers for the test shaft to pass through, and an oil collection structure for preventing lubricating oil from leaking is provided between each oil scraping end cover and the test shaft; an anti-rotation rod is installed on the bearing support, and an anti-rotation hole for inserting the end of the anti-rotation rod is provided on the outer ring of the support bearing.

2. The marine bearing swing test device according to claim 1, characterized in that: The oil collecting structure includes an oil-slinging ring groove arranged on the outer peripheral side of the test shaft and a circumferential oil groove arranged on the oil scraper end cover. The notch of the circumferential oil groove is arranged opposite to the notch of the oil-slinging ring groove. The oil-slinging ring groove is used to throw the overflowed lubricating oil into the circumferential oil groove when the test shaft rotates. The oil scraper end cover is also provided with an oil return hole connecting the circumferential oil groove and the oil storage chamber.

3. The marine bearing sway test device according to claim 2, characterized in that: The oil scraper end cover is also provided with a V-shaped annular groove, the notch direction of the V-shaped annular groove is the same as the notch direction of the circumferential oil groove, and both sides of the circumferential oil groove are provided with V-shaped annular grooves.

4. The marine bearing sway test device according to claim 1, characterized in that: A thrust end cover is sealed and installed on the left bearing support, and the thrust end cover is arranged opposite to the oil scraping end cover on the left bearing support.

5. The marine bearing sway test device according to claim 1, characterized in that: A U-shaped frame is fixed in the oil storage cavity, the test shaft passes through the U-shaped frame, and the shaft vibration sensor is installed on the U-shaped frame.

6. The marine bearing sway test device according to claim 1, characterized in that: The setting position of the oil inlet is higher than the setting position of the oil outlet.

7. The marine bearing sway test device according to claim 1, characterized in that: The main shaft of the driving motor is connected to the transmission shaft through a synchronous belt. A motor base is provided at the bottom of the driving motor. The driving motor is guided and slidably assembled on the motor base. An adjustment block is provided on the motor base. There are at least two adjustment blocks and they are divided into two rows. The driving motor is installed between the two rows of adjustment blocks. Each adjustment block is threadedly assembled with an adjustment bolt. The driving motor is clamped and fixed between the two rows of adjustment bolts.

8. The marine bearing sway test device according to claim 1, characterized in that: The swing and tilt test device includes a base plate, on which a base with a rotation axis extending in the up-down direction is rotatably mounted, and a first driving mechanism for driving the base to rotate is provided on the base. The test device also includes a test bench located on the upper side of the base, and the four corners of the test bench are respectively connected to the base through a servo telescopic cylinder, the upper end of the servo telescopic cylinder is connected to the test bench ball joint, and the lower end of the servo telescopic cylinder is connected to the base through a universal joint. The test device also includes an auxiliary support for constraining the test bench, the lower end of the auxiliary support is fixedly connected to the base, and the upper end is connected to the test bench. The test bench includes a frame and a swing platform rotatably mounted in the frame, the rotation axis of the swing platform extends in the front-rear direction, and the frame is provided with a second driving mechanism for driving the swing platform to rotate and a braking mechanism for braking the swing platform.

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