A marine bearing swing test device

Abstract

The present invention relates to a marine bearing swing test device. The test system comprises a swing tilt test device, which comprises a test bench, and the marine bearing swing test device comprises a space-loaded inverted bearing test bench, which comprises a driving motor, a transmission shaft, a load-removing mechanism, a test shaft, a flexible loading device, and a bearing support assembly. The lifting mechanism comprises a flexible part, a first telescopic cylinder, and a second telescopic cylinder. One end of the flexible part is connected to the driving end of the first telescopic cylinder, and the other end is connected to the suspension assembly. The driving end of the second telescopic cylinder is supported in the middle of the flexible part. The bearing support assembly comprises a left bearing support and a right bearing support. The right bearing support faces one side of the transmission shaft. Bearings are installed in both the left bearing support and the right bearing support. The bearing in the left bearing support is movably assembled, and the bearing in the right bearing support is fixedly assembled. 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 problem that the bearing test bench in the prior art has a single load application direction and the load application direction 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 comprises a swing tilt test device, the swing tilt test device comprises a test bench, the marine bearing swing test device also comprises a space-loaded inverted bearing test bench located on the test bench, the space-loaded inverted bearing test bench comprises a drive motor, a transmission shaft, a load-removing mechanism, a test shaft, a flexible loading device and a bearing support assembly, one end of the transmission shaft is connected to the drive motor in a transmission manner, and the other end is connected to the test bearing in a transmission manner, the load-removing mechanism is used to remove 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 suspension assemblies spaced apart along the outer circumference of the suspension assembly. A lifting mechanism is provided in the suspension assembly, and a slot structure for assembling sliding bearings and test shafts is provided in the lifting mechanism, which includes a flexible part, a first telescopic cylinder and a second telescopic cylinder, one end of the flexible part is connected to the driving end of the first telescopic cylinder, and the other end is used to connect 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; the bearing support group includes a left bearing support and a right bearing support which are respectively rotatably supported at both ends of the test shaft, and the right bearing support faces one side of the transmission shaft, and bearings are installed in both the left bearing support and the right bearing support, the bearing in the left bearing support is movably assembled, and the bearing in the right bearing support is fixedly assembled.

[0007] As a further improvement of the above technical solution, the bearing in the left bearing support is set as the first bearing, and a first nut, a loading sleeve and an elastic member are also installed in the left bearing support. The inner ring of the first bearing is clamped and fixed by the shoulder of the test shaft and the first nut. The loading sleeve is arranged on the left side of the outer ring of the first bearing. The elastic member is used to apply a force to the loading sleeve so that the loading sleeve is in elastic pressing contact with the outer ring of the first bearing.

[0008] As a further improvement to the above technical solution, a first sleeve is arranged between the first nut and the first bearing inner ring, and a first labyrinth structure for enhancing sealing is arranged on the first sleeve.

[0009] As a further improvement to the above technical solution, a guide pin is fixed on the loading sleeve, the elastic member is a spring, and the guide pin is inserted into the spring.

[0010] As a further improvement to the above technical solution, a preload sleeve is further installed in the left bearing support, and a positioning hole for inserting a spring is provided in the preload sleeve.

[0011] As a further improvement of the above technical solution, a first end cover, a fixing sleeve and an outer fixing ring are also installed in the left bearing support, the first bearing gap is assembled inside the fixing sleeve, and the two ends of the fixing sleeve are clamped and fixed between the first end cover and the outer fixing ring.

[0012] As a further improvement of the above technical solution, the bearing in the right bearing support is set as the second bearing, and the second nut, the second end cover and the third end cover are installed in the right bearing support. The outer ring of the second bearing is clamped and fixed between the second end cover and the third end cover, and the inner ring of the second bearing is clamped and fixed between the shoulder of the test shaft and the second nut.

[0013] As a further improvement to the above technical solution, a second sleeve is arranged between the second nut and the second bearing inner ring, and a second labyrinth structure for enhancing sealing is arranged on the second sleeve.

[0014] As a further improvement of the above technical solution, a buffer part and a tension sensor are also installed between the flexible part and the suspension assembly or between the flexible part and the first telescopic cylinder; the driving end of the second telescopic cylinder is provided with a first pulley assembly for the flexible part to bypass, and the cylinder wall of the second telescopic cylinder is provided with a second pulley assembly for the flexible part to bypass.

[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] When the marine bearing sway test device of the present invention is used, the driving mechanism drives the base to rotate, and the base drives the test bench to achieve bow sway; the first Hooke's hinge + servo telescopic cylinder + ball pair form redundant constraints, and the second Hooke's hinge of the intermediate auxiliary support is used to constrain the remaining four degrees of freedom, and the reciprocating motion of the servo telescopic cylinder drives the test platform to achieve roll and pitch. By adjusting the inclination angle of the swing platform, the use scenario of the marine bearing in an inclined state is simulated. 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 load application direction and facilitating the detection of the sliding bearing. In addition, in the present invention, by setting the unloading mechanism and the 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, the bearing in the left bearing support is movably assembled, and the bearing in the right bearing support is fixedly assembled, so that the bearing in the left bearing support can be adjusted automatically during the detection process, ensuring the stability of the operation.

[0018] During the use of the marine bearing sway test device of the present invention, the two ends of the flexible traction mechanism are respectively connected and fixed to the test bench. Since the flexible traction mechanism can be flexibly bent and can slide relative to the gantry bracket, when the test bench sways, the flexible traction mechanism will slide along with the sway of the test bench, thereby avoiding the influence of the flexible traction mechanism on the sway test. The marine bearing sway test device of the present invention can realize roll, pitch, bow roll and tilt, and can more realistically simulate various use scenarios of marine bearings, providing a basis for the design and manufacture of marine bearings.

[0019] The auxiliary supporting telescopic rod in the marine bearing sway test device of the present invention can play a pre-adjustment role, that is, the height position of the entire test bench can be adjusted. Once the adjustment is completed, it can be locked and fixed by a bolt locking device. When the telescopic rod adopts hydraulic support, it can play a vibration reduction role for the entire test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 ;

[0021] 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 ;

[0022] 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;

[0023] 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;

[0024] 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;

[0025] 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;

[0026] Figure 7 yes Figure 6 A cross-sectional view of the base and the bottom plate in FIG.

[0027] 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;

[0028] 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;

[0029] 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;

[0030] Fig.11 yes Fig.10 The structural diagram of the motor and reducer in FIG.

[0031] Fig.12 yes Fig.10 A schematic diagram of the structure of the rotating shaft in FIG.

[0032] Fig.13 yes Fig.10 Schematic diagram of the assembly of the connecting sleeve, the plane bearing and the connecting ring;

[0033] Fig.14 yes Fig.10 A schematic diagram of the structure of the connecting sleeve in FIG.

[0034] Fig.15 yes Fig.10 A schematic diagram of the structure of the connecting ring in FIG.

[0035] 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 ;

[0036] Fig.17The 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 ;

[0037] 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 ;

[0038] 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;

[0039] 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;

[0040] 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;

[0041] Fig. 22 It is a three-dimensional schematic diagram of the overall structure of the space-loaded inverted bearing test bench in the marine bearing swing test device of the present invention;

[0042] Fig.23 It is a schematic top view of the overall structure of the space-loaded inverted bearing test bench in the marine bearing swing test device of the present invention;

[0043] Fig.24 yes Fig.23 Schematic diagram of the cross-section at AA in the middle;

[0044] Fig.25 yes Fig.24 A partial enlarged view of point C in the middle;

[0045] Fig.26 yes Fig.24 A partial enlarged view of point B in the middle;

[0046] Fig. 27 It is a partial structural stereoscopic diagram of a space-loaded inverted bearing test bench in a marine bearing swing test device of the present invention;

[0047] Fig.28 It is a structural schematic diagram of a flexible loading device in a space-loading inverted bearing test bench in a marine bearing swing test device of the present invention;

[0048] Fig.29 It is a structural schematic diagram of a lifting mechanism in a space-loaded inverted bearing test bench in a marine bearing sway test device of the present invention;

[0049] Fig.30It is a schematic diagram of the overall structure of the suspension assembly in the space loading inverted bearing test bench in the marine bearing swing test device of the present invention;

[0050] Fig.31 It is a cross-sectional schematic diagram of the internal structure of the suspension assembly in the space-loaded inverted bearing test bench in the marine bearing swing test device of the present invention;

[0051] Fig.32 It is a structural schematic diagram of a marine bearing swing test device of the present invention;

[0052] 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, drive motor; 41, flexible loading device; 42, bearing support group; 421, right bearing support; 422, left bearing support; 423, support base; 43, synchronous belt; 44, unloading mechanism; 45, suspension assembly; 46, lifting mechanism; 47, transmission shaft; 48, test shaft; 49, positioning guide rail; 50, first bearing; 51, Outer fixing ring; 52, loading sleeve; 53, elastic member; 54, first sleeve; 55, first nut; 56, preload sleeve; 57, guide pin; 58, fixing sleeve; 59, first end cover; 60, second end cover; 61, second bearing; 62, third end cover; 63, second sleeve; 64, first telescopic cylinder; 65, second telescopic cylinder; 66, flexible member; 67, guide plate; 68, first pulley assembly; 69, buffer member; 70, tension sensor; 71, bottom frame; 72, second pulley assembly; 73, slot structure; 74, outer shell; 75, lining; 76, sliding bearing. DETAILED DESCRIPTION

[0053] 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.

[0054] 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 inverted bearing test bench.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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 .

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] In this embodiment, Figures 22 to 32As shown, the space loading inverted bearing test bench includes a driving motor 40, a transmission shaft 47, a unloading mechanism 44, a test shaft 48, a flexible loading device 41 and a bearing support group 42, one end of the transmission shaft 47 is connected to the driving motor 40, and the other end is connected to the test shaft 48, the unloading mechanism 44 is used to remove the deflection and vibration of the transmission shaft 47; the test shaft 48 is used to set the sliding bearing 76; the flexible loading device 41 includes a suspension assembly 45 and a plurality of lifting mechanisms 46 arranged at intervals along the outer peripheral side of the suspension assembly 45, the suspension assembly 45 is provided with a slot structure 73 for assembling the sliding bearing 76 and the test shaft 48, the lifting mechanism 41 is used to remove the sliding bearing 76 and the test shaft 48, and the lifting mechanism 41 is used to remove the sliding bearing 76 and the test shaft 48. The mechanism 46 includes a flexible member 66, a first telescopic cylinder 64 and a second telescopic cylinder 65, one end of the flexible member 66 is connected to the driving end of the first telescopic cylinder 64, and the other end is used to connect to the suspension assembly 45, the driving end of the second telescopic cylinder 65 is upward and supported in the middle of the flexible member 66; the bearing support group 423 includes a left bearing support 422 and a right bearing support 421 which are respectively rotatably supported at both ends of the test shaft 48, the right bearing support 421 faces the side of the transmission shaft 47, and bearings are installed in the left bearing support 422 and the right bearing support 421, the bearing in the left bearing support 422 is movably assembled, and the bearing in the right bearing support 421 is fixedly assembled.

[0080] Specifically, in this embodiment, the driving motor 40 is a servo motor, and a motor base is provided at the bottom of the driving motor 40. In order to reduce the vibration of the driving motor 40, a vibration isolation pad is provided below the motor base in this embodiment, and the vibration isolation pad is specifically a rubber pad. In this embodiment, the main shaft of the driving motor 40 is connected to the transmission shaft 47 by transmission, and the transmission connection method is specifically a synchronous belt 434 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 47. The diameter of the large pulley is larger than that of the small pulley, and the synchronous belt 434 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 43 to rotate, and the synchronous belt 43 will drive the small pulley to rotate, thereby realizing the rotation drive of the transmission shaft 47. 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.

[0081] In this embodiment, the transmission shaft 47 is a transmission rod, one end of which is transmission-connected to the synchronous belt 43, and the other end of which is transmission-connected to the test shaft 48 through a coupling. Since the synchronous belt 43 will exert a lateral force on the transmission shaft 47, in order to avoid a large bending of the transmission shaft 47, a load-relief mechanism 44 is also installed at the transmission shaft 47 in this embodiment. The load-relief mechanism 44 includes a load-relief bearing seat and a load-relief base. The load-relief bearing seat is installed on the load-relief base. A load-relief bearing is installed in the load-relief bearing seat. The load-relief bearing is specifically an angular contact ball bearing, as shown in FIG. Figure 3As shown, in this embodiment, there are two unloading bearings, and the unloading bearing seat is provided with an unloading mounting hole for mounting the two unloading bearings. A front sealing cover and a rear sealing cover are respectively 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 an annular protrusion for separating the two unloading bearings is provided on the outer peripheral side of the transmission shaft 47. In this embodiment, the transmission shaft 47 is inserted into the inner rings of the two unloading bearings, and the tension and vibration of the synchronous belt 43 are weakened by the radial limiting effect of the unloading bearings.

[0082] In this embodiment, the test shaft 48 is a rotating rod, and one end of the test shaft 48 is in transmission connection with the transmission shaft 47. In this embodiment, the test shaft 48 and the transmission shaft 47 are coaxially arranged. In order to keep the test shaft 48 at a set position, this embodiment also includes a bearing support group 42. Specifically, the bearing support group 42 includes a left bearing support 422 and a right bearing support 421 that are rotatably supported on both sides of the test shaft 48, respectively. In this embodiment, the right bearing support 421 is arranged on the side close to the transmission shaft 47.

[0083] In this embodiment, a first bearing 50 is installed in the left bearing support 422, and the first bearing 50 is movably assembled in the left bearing support 422. Specifically, in this embodiment, a loading sleeve 52, an elastic member 53, a first nut 55, a first sleeve 54, a guide pin 57, a preload sleeve 56, a first end cover 59, a fixed sleeve 58 and an outer fixed ring 51 are arranged in the left bearing support 422. There are two first bearings 50, and both of the two first bearings 50 are sleeved on the outer peripheral side of the test shaft 48. The fixed sleeve 58 is arranged on the outer peripheral side of the two first bearings 50. In this embodiment, the first end cover 59 is fixed to the right side of the left bearing support 422 by screws, and the outer fixed ring 51 is fixed to the left side of the left bearing support 422 by screws. The fixed sleeve 58 is clamped between the first end cover 59 and the outer fixed ring 51, thereby preventing the fixed sleeve 58 from axially escaping from the left bearing support 422. In this embodiment, a shaft shoulder is provided on the outer circumference of the test shaft 48, and the first nut 55 is threadedly assembled on the test shaft 48. The inner rings of the two first bearings 50 are clamped and fixed between the first nut 55 and the shaft shoulder of the test shaft 48. In this embodiment, the first sleeve 54 is provided between the first nut 55 and the first bearing 50. In order to enhance the sealing performance, a first labyrinth structure is provided on the first sleeve 54 in this embodiment. Specifically, an inner annular protrusion is provided on the left side of the first sleeve 54, and a step structure (similar to a shaft shoulder) is provided on the outer circumference of the test shaft 48. The sealing performance is enhanced by the blocking effect of the inner annular protrusion and the step structure.

[0084] In this embodiment, the loading sleeve 52 is sleeved on the outer circumference of the first sleeve 54, and the preload sleeve 56 is provided with an inner stepped hole, and the loading sleeve 52 is located in the inner stepped hole of the preload sleeve 56. A plurality of positioning holes are also provided on the inner stepped surface of the preload sleeve 56, each of which is a blind hole, and each of which is spaced along the circumferential direction. Each of the positioning holes is installed with an elastic member 53, and the elastic member 53 is specifically a spring. In this embodiment, a plurality of guide pins 57 corresponding to the positioning holes are also provided on the loading sleeve 52, and each of the guide pins 57 is fixed to the loading sleeve 52 by interference fitting, and each of the guide pins 57 is respectively inserted into each positioning hole and penetrates into the corresponding spring. In this embodiment, each spring member can push the loading sleeve 52 to the right, and the loading sleeve 52 is pressed into contact with the outer ring of the first bearing 50, thereby realizing the floating assembly of the outer ring of the first bearing 50. In order to improve the sealing performance, a sealing cover plate is installed at the left end of the inner stepped hole of the preload sleeve 56 in this embodiment. In this embodiment, the inner stepped hole of the preload sleeve 56 is used for inserting the end of the test shaft 48, and the provision of the sealing cover plate prevents the test shaft 48 from being exposed to the outside.

[0085] In this embodiment, two second bearings 61 are installed in the right bearing support 421, and the second end cover 60 and the third end cover 63 are fixed to the two sides of the right bearing support 421 by screws, respectively, and the outer rings of the two second bearings 61 are clamped between the second end cover 60 and the third end cover 63. In this embodiment, a second sleeve 63 is also installed in the right bearing support 421, and the second sleeve 63 is fixed to the second end cover 60 by screws, and the inner rings of the two second bearings 61 are clamped and fixed between the second sleeve 63 and the shaft shoulder of the test shaft 48. In order to improve the sealing performance, in this embodiment, a second labyrinth structure is provided on the second sleeve 63, and an outer annular flange folded outward is provided on the right side of the second sleeve 63, and an annular groove for inserting the outer annular flange is provided on the second end cover 60.

[0086] In this embodiment, the two ends of the test shaft 48 are respectively inserted into the inner rings of the first bearing 50 and the second bearing 61, wherein the right end of the test shaft 48 passes through the two second bearings 61 and is in transmission connection with the transmission shaft 47. In this embodiment, the outer peripheral side of the test shaft 48 is to be fitted and fixed with the sliding bearing 76 to be tested. In order to make the left bearing support 422 and the right bearing support 421 have better installation accuracy, in this embodiment, a support base 423 is also installed at the bottom of the bearing support, and a positioning guide rail 49 is installed on the support base 423. The positioning guide rail 49 is in the shape of a rectangular parallelepiped, and the bottoms of the left bearing support 422 and the right bearing support 421 are both provided with positioning grooves matching the shape of the positioning guide rail 49. In this embodiment, the positioning guide rail 49 is embedded in the support base 423, and the support base 423 is provided with a positioning long groove for the positioning guide rail 49 to be inserted horizontally. In this embodiment, the positioning guide rail 49 is fixed to the support base 423 by screws.

[0087] In this embodiment, the flexible loading device 41 includes a suspension assembly 45 and a plurality of lifting mechanisms 46 arranged at intervals along the outer peripheral side of the suspension assembly 45; there are four lifting mechanisms 46, and the four lifting mechanisms 46 are respectively arranged at four positions of the suspension assembly 45, and the suspension assembly 45 is located at the center position of the four lifting mechanisms 46.

[0088] In this embodiment, each lifting mechanism 46 includes a first telescopic cylinder 64 and a second telescopic cylinder 65 arranged in parallel. The first telescopic cylinder 64 and the second telescopic cylinder 65 are both extended and arranged in the vertical direction and the driving ends are both located at the top. In this embodiment, the first telescopic cylinder 64 and the second telescopic cylinder 65 are hydraulic telescopic cylinders. In other embodiments, the first telescopic cylinder 64 and the second telescopic cylinder 65 can also be electric push rods, cylinders, etc. In this embodiment, the size of the first telescopic cylinder 64 is smaller than the size of the second telescopic cylinder 65, and the second telescopic cylinder 65 is located between the suspension assembly and the first telescopic cylinder 64. In this embodiment, the flexible member 66 is a steel wire rope. In other embodiments, the flexible member 66 can also be a hemp rope, a chain, a high-strength carbon fiber rope, etc. One end of the flexible member 66 is connected and fixed to the driving end of the first telescopic cylinder 64, and the other end is used to connect to the suspension assembly. In this embodiment, the second telescopic cylinder 65 is supported at the middle position of the flexible member 66. Since the size of the second telescopic cylinder 65 is larger, the flexible member 66 as a whole presents an arched shape with the middle bulging upward and the two ends extending downward.

[0089] Since the flexible member 66 is to pull the suspension assembly to move, in order to avoid the rigid pulling between the suspension assembly and the flexible member 66, a buffer member 69 is installed between the flexible member 66 and the suspension assembly in this embodiment. The buffer member 69 is a tension spring in this embodiment. In other embodiments, the buffer member 69 can also be installed at a position between the flexible member 66 and the first telescopic cylinder 64.

[0090] In order to facilitate the observation of the force applied by each flexible member 66, a tension sensor 70 is also installed between the buffer member 69 and the suspension assembly in this embodiment. The tension sensor 70 can monitor the force between the flexible member 66 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 70 can also be installed at other positions such as between the flexible member 66 and the first telescopic cylinder 64.

[0091] Since the flexible member 66 needs to go around the top (driving end) of the second telescopic cylinder 65, in order to avoid the situation where the flexible member 66 is easily worn due to large friction, a first pulley assembly 68 is installed on the top of the second telescopic cylinder 65 in this embodiment. In order to prevent the flexible member 66 from easily detaching from the first pulley assembly 68, the first pulley assembly 68 in this embodiment includes three pulleys, which are arranged in a straight line, and the flexible member 66 goes around the corresponding pulleys in a wave shape.

[0092] In order to avoid the flexible member 66 from contacting the second telescopic cylinder 65, a second pulley assembly 72 is further installed on the cylinder wall of the second telescopic cylinder 65 in this embodiment. In this embodiment, the second pulley assembly 72 includes only one pulley, which is supported between the second telescopic cylinder 65 and the flexible member 66, thereby avoiding the flexible member 66 from contacting the second telescopic cylinder 65. It should be noted that in order to further achieve the limiting effect on the flexible member 66, 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 66 to be inserted laterally.

[0093] Since the first pulley assembly 68 moves up and down with the extension and retraction of the second telescopic cylinder 65, in order to enhance the guiding effect, in this embodiment, a guide plate 67 is further installed on the cylinder wall of the second telescopic cylinder 65, and the guide plate 67 is also extended in the up and down direction. In this embodiment, there are two guide plates 67, which are symmetrically arranged on both sides of the second telescopic cylinder 65, and each guide plate 67 is provided with a guide groove, and the corresponding two sides of the first pulley assembly 68 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.

[0094] In this embodiment, the suspension assembly includes an inner liner 75 and an outer shell 74, wherein the inner liner 75 is installed on the inner side of the outer shell 74. Since a sliding bearing 76 is to be installed in the suspension assembly, in order to facilitate the installation of the sliding bearing 76, in this embodiment, the inner liner 75 and the outer shell 74 are both detachably arranged. Fig. 9 and Fig.10 As shown, in this embodiment, the suspension assembly is spherical, the outer shell 74 is corresponding to the spherical outer shell 74, and the liner 75 is also a spherical structure. In this embodiment, the outer shell 74 includes two upper and lower parts, both of which are hemispherical, and the liner 75 also includes two upper and lower parts, both of which are hemispherical. The two parts of the outer shell 7435 are fixed by bolts, and the two parts of the liner 75 are also fixed by bolts. In this embodiment, the liner 75 can rotate in the outer shell 74. In order to limit the rotation direction, in this embodiment, a long strip protrusion is provided on the outer peripheral surface of the liner 75, and a guide groove for the long strip protrusion to be inserted horizontally is correspondingly provided on the inner wall of the outer shell 74.

[0095] In this embodiment, the inner liner 75 is provided with a slot structure 73 for installing the sliding bearing 76 and the test shaft 48. In this embodiment, the slot structure 73 includes a circle of annular grooves provided on the inner wall of the inner liner 75, and also includes a circular through hole that penetrates both the inner liner 75 and the outer shell 74. When installing the sliding bearing 76, the sliding bearing 76 is inserted horizontally into the annular groove of half of the inner liner 75, and then the other half of the inner liner 75 is buckled. The test shaft 48 will also be buckled into the circular through hole accordingly.

[0096] In this embodiment, each suspension assembly and each tension sensor 70 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 70, and the sphere is fixedly connected to the outer shell 74 of the suspension assembly.

[0097] In order to avoid the situation that the flexible member 66 needs to pull the suspension assembly when not testing, a support platform 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. Since the suspension assembly in this embodiment is spherical, the limiting groove in this embodiment is also a curved groove.

[0098] In this embodiment, a cushion frame is also installed at the bottom of the support platform. The cushion frame is installed on the support base 423 by screws, and the positioning guide rail 49 passes through the cushion frame. In this embodiment, a pad block slider is also installed on the positioning guide rail 49. The pad block slider is in the shape of a U-shaped groove. The pad block slider covers the positioning guide rail 49. A positioning pin is also provided on the pad block slider. The position of the pad block slider is fixed by the top pressure contact between the positioning pin and the positioning guide rail 49. In this embodiment, the pad block slider is located in the cushion frame. In this embodiment, a bottom frame 71 is also installed at the bottom of each lifting mechanism 46. The first telescopic cylinder 64 and the second telescopic cylinder 65 are both installed on the same bottom frame 71. In this embodiment, the bottom frame 71 serves as a basic base. In this embodiment, vibration isolation pads are installed at the bottom of the support base 423 and the bottom of each bottom frame 71.

[0099] The working principle of the marine bearing sway test device of the present invention is as follows: when testing is required, firstly, the sliding bearing 76 is fixed on the test shaft 48, and then the sliding bearing 76 and the test shaft 48 are installed in the slot structure 73 of the suspension assembly, and then the tension applied by the corresponding flexible member 66 can be adjusted by adjusting the telescopic amount of the first telescopic cylinder 64 and the second telescopic cylinder 65 of each lifting mechanism 46, so as to adjust and set the loading force of the sliding bearing 76, and finally, the driving motor 40 is started, and the driving motor 40 drives the test shaft 48 to rotate, and the operation of the sliding bearing 76 can be observed. It should be noted that, because the direction of gravity on the bearing remains unchanged under actual working conditions, 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 is subjected to dynamic loading via four flexible parts 47, when the suspension assembly 40 is subjected to swing detection, the four flexible parts 47 will be dynamically adjusted accordingly. 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.

[0100] The driving mechanism drives the base to rotate, and the base drives the test bench to achieve bow swing; the first Hook joint + servo telescopic cylinder + ball joint form a redundant constraint, and the second Hook joint of the middle auxiliary support is used to constrain the remaining four degrees of freedom. Through the reciprocating motion of the servo telescopic cylinder, the test dynamic platform is driven to achieve roll and pitch. By adjusting the inclination angle of the swing platform, the use scenario of marine equipment in an inclined state is simulated. In this process, the telescopic rod of the middle auxiliary support can adjust the height of the test bench. Once the adjustment is completed, it can be locked and fixed with a bolt locking device.

[0101] The present invention provides a marine bearing sway test device, which has the following advantages compared with the prior art: when the marine bearing sway test device of the present invention is used, the driving mechanism drives the base to rotate, and the base drives the test platform to achieve bow sway; the first Hooke's hinge + servo telescopic cylinder + ball pair form redundant constraints, and the second Hooke's hinge with intermediate auxiliary support is used to constrain the remaining four degrees of freedom, and the reciprocating motion of the servo telescopic cylinder drives the test platform to achieve roll and pitch. By adjusting the inclination angle of the swaying platform, the use scenario of the marine bearing in an inclined state is simulated. During the test, the traction force of each flexible part can be adjusted 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 load application direction and facilitating the detection of the sliding bearing. In addition, in the present invention, by setting the unloading mechanism and the 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, the bearing in the left bearing support is movably assembled, and the bearing in the right bearing support is fixedly assembled, so that the bearing in the left bearing support can be adjusted automatically during the detection process, thereby ensuring the stability of operation, keeping the direction of the loading force always vertically pointing to the ground, and reducing the test error.

[0102] During the use of the marine bearing sway test device of the present invention, the two ends of the flexible traction mechanism are respectively connected and fixed to the test bench. Since the flexible traction mechanism can be flexibly bent and can slide relative to the gantry bracket, when the test bench sways, the flexible traction mechanism will slide along with the sway of the test bench, thereby avoiding the influence of the flexible traction mechanism on the sway test. The marine bearing sway test device of the present invention can realize roll, pitch, bow roll and tilt, and can more realistically simulate various use scenarios of marine bearings, providing a basis for the design and manufacture of marine bearings.

[0103] The auxiliary supporting telescopic rod in the marine bearing sway test device of the present invention can play a pre-adjustment role, that is, the height position of the entire test bench can be adjusted. Once the adjustment is completed, it can be locked and fixed by a bolt locking device. When the telescopic rod adopts hydraulic support, it can play a vibration reduction role for the entire test bench.

[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. A marine bearing swing test device, characterized in that: The invention comprises a swing and tilt test device, which comprises a test bench, and the marine bearing swing test device also comprises a space-loaded inverted bearing test bench located on the test bench, and the space-loaded inverted bearing test bench comprises a driving motor, a transmission shaft, a unloading mechanism, a test shaft, a flexible loading device and a bearing support assembly, 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 the sliding bearing; the flexible loading device comprises a suspension assembly and a plurality of lifting mechanisms spaced apart along the outer peripheral side of the suspension assembly, The suspension assembly is provided with a slot structure for assembling sliding bearings and test shafts. The lifting mechanism includes a flexible member, a first 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. The bearing support group includes a left bearing support and a right bearing support respectively rotatably supported at both ends of the test shaft, and the right bearing support faces one side of the transmission shaft. Bearings are installed in both the left bearing support and the right bearing support. The bearing in the left bearing support is movably assembled, and the bearing in the right bearing support is fixedly assembled. The bearing in the left bearing support is set as the first bearing. A first nut, a loading sleeve and an elastic member are also installed in the left bearing support. The inner ring of the first bearing is clamped and fixed by the shoulder of the test shaft and the first nut. The loading sleeve is arranged on the left side of the outer ring of the first bearing. The elastic member is used to apply a force to the loading sleeve so that the loading sleeve is in elastic pressing contact with the outer ring of the first bearing. The bearing in the right bearing support is set as the second bearing. The second nut, the second end cover and the third end cover are installed in the right bearing support. The outer ring of the second bearing is clamped and fixed between the second end cover and the third end cover, and the inner ring of the second bearing is clamped and fixed between the shoulder of the test shaft and the second nut.

2. The marine bearing swing test device according to claim 1, characterized in that: A first sleeve is arranged between the first nut and the first bearing inner ring, and a first labyrinth structure for enhancing sealing is arranged on the first sleeve.

3. The marine bearing swing test device according to claim 1, characterized in that: A guide pin is fixed on the loading sleeve, the elastic member is a spring, and the guide pin is inserted into the spring.

4. The marine bearing sway test device according to claim 3, characterized in that: A preload sleeve is also installed in the left bearing support, and a positioning hole for inserting a spring is arranged in the preload sleeve.

5. The marine bearing sway test device according to claim 1, characterized in that: The left bearing support is also equipped with a first end cover, a fixing sleeve and an outer fixing ring. The first bearing is gap-assembled inside the fixing sleeve. Both ends of the fixing sleeve are clamped and fixed between the first end cover and the outer fixing ring.

6. The marine bearing sway test device according to claim 1, characterized in that: A second sleeve is arranged between the second nut and the second bearing inner ring, and a second labyrinth structure for enhancing sealing is arranged on the second sleeve.

7. The marine bearing sway test device according to claim 1, characterized in that: A buffer and a tension sensor are also installed between the flexible part and the suspension assembly or between the flexible part and the first telescopic cylinder; the driving end of the second telescopic cylinder is provided with a first pulley assembly for the flexible part to bypass, and the cylinder wall of the second telescopic cylinder is provided with a second pulley assembly for the flexible part to bypass.

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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